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149 lines
2.7 KiB
JavaScript
149 lines
2.7 KiB
JavaScript
/**
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* @author Don McCurdy / https://www.donmccurdy.com
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*/
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THREE.DRACOLoader = function ( manager ) {
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THREE.Loader.call( this, manager );
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this.decoderType = typeof WebAssembly !== 'object' || this.workerLimit === 0 ? 'js' : 'wasm';
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this.decoderConfig = {};
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this.decoderBinary = null;
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this.decoderPending = null;
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this.workerLimit = 4;
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this.workerPool = [];
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this.workerNextTaskID = 1;
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this.workerSourceURL = '';
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this.defaultAttributeIDs = {
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position: 'POSITION',
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normal: 'NORMAL',
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color: 'COLOR',
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uv: 'TEX_COORD'
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};
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this.defaultAttributeTypes = {
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position: 'Float32Array',
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normal: 'Float32Array',
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color: 'Float32Array',
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uv: 'Float32Array'
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};
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};
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THREE.DRACOLoader.prototype = Object.assign( Object.create( THREE.Loader.prototype ), {
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constructor: THREE.DRACOLoader,
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setDecoderType: function ( type ) {
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this.decoderType = type;
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return this;
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},
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setWorkerLimit: function ( workerLimit ) {
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this.workerLimit = workerLimit;
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return this;
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},
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setVerbosity: function ( level ) {
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this.verbosity = level;
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return this;
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},
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setDecoderConfig: function ( config ) {
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this.decoderConfig = config;
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return this;
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},
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setDecoderPath: function ( path ) {
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this.decoderPath = path;
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return this;
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},
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preload: function () {
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this._initDecoder();
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return this;
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},
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_initDecoder: function () {
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if ( this.decoderPending ) return this.decoderPending;
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const useJS = this.decoderType === 'js';
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const librariesPending = [];
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if ( useJS ) {
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librariesPending.push( this._loadLibrary( 'draco_decoder.js', 'text' ) );
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} else {
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librariesPending.push( this._loadLibrary( 'draco_wasm_wrapper.js', 'text' ) );
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librariesPending.push( this._loadLibrary( 'draco_decoder.wasm', 'arraybuffer' ) );
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}
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this.decoderPending = Promise.all( librariesPending )
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.then( ( libraries ) => {
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const jsContent = libraries[ 0 ];
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if ( useJS ) {
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this.decoderSourceURL = URL.createObjectURL( new Blob( [ jsContent ], { type: 'application/javascript' } ) );
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} else {
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this.decoderSourceURL = URL.createObjectURL( new Blob( [ jsContent ], { type: 'application/javascript' } ) );
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this.decoderConfig.wasmBinary = libraries[ 1 ];
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}
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} );
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return this.decoderPending;
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},
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_loadLibrary: function ( url, responseType ) {
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const loader = new THREE.FileLoader( this.manager );
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loader.setPath( this.decoderPath );
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loader.setResponseType( responseType );
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loader.setWithCredentials( this.withCredentials );
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return new Promise( ( resolve, reject ) => {
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loader.load( url, resolve, undefined, reject );
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} );
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},
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dispose: function () {
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this.workerPool.length = 0;
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if ( this.decoderSourceURL !== '' ) {
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URL.revokeObjectURL( this.decoderSourceURL );
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}
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return this;
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}
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} ); |