kopia lustrzana https://github.com/OpenDroneMap/WebODM
640 wiersze
14 KiB
JavaScript
640 wiersze
14 KiB
JavaScript
const {
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BufferAttribute,
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BufferGeometry,
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FileLoader,
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Loader
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} = THREE;
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var DRACOLoader = function ( manager ) {
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Loader.call( this, manager );
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this.decoderPath = '';
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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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DRACOLoader.prototype = Object.assign( Object.create( Loader.prototype ), {
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constructor: DRACOLoader,
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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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setDecoderConfig: function ( config ) {
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this.decoderConfig = config;
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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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/** @deprecated */
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setVerbosity: function () {
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console.warn( 'THREE.DRACOLoader: The .setVerbosity() method has been removed.' );
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},
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/** @deprecated */
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setDrawMode: function () {
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console.warn( 'THREE.DRACOLoader: The .setDrawMode() method has been removed.' );
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},
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/** @deprecated */
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setSkipDequantization: function () {
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console.warn( 'THREE.DRACOLoader: The .setSkipDequantization() method has been removed.' );
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},
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load: function ( url, onLoad, onProgress, onError ) {
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var loader = new FileLoader( this.manager );
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loader.setPath( this.path );
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loader.setResponseType( 'arraybuffer' );
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loader.setRequestHeader( this.requestHeader );
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loader.setWithCredentials( this.withCredentials );
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loader.load( url, ( buffer ) => {
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var taskConfig = {
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attributeIDs: this.defaultAttributeIDs,
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attributeTypes: this.defaultAttributeTypes,
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useUniqueIDs: false
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};
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this.decodeGeometry( buffer, taskConfig )
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.then( onLoad )
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.catch( onError );
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}, onProgress, onError );
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},
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/** @deprecated Kept for backward-compatibility with previous DRACOLoader versions. */
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decodeDracoFile: function ( buffer, callback, attributeIDs, attributeTypes ) {
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var taskConfig = {
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attributeIDs: attributeIDs || this.defaultAttributeIDs,
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attributeTypes: attributeTypes || this.defaultAttributeTypes,
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useUniqueIDs: !! attributeIDs
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};
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this.decodeGeometry( buffer, taskConfig ).then( callback );
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},
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decodeGeometry: function ( buffer, taskConfig ) {
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// TODO: For backward-compatibility, support 'attributeTypes' objects containing
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// references (rather than names) to typed array constructors. These must be
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// serialized before sending them to the worker.
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for ( var attribute in taskConfig.attributeTypes ) {
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var type = taskConfig.attributeTypes[ attribute ];
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if ( type.BYTES_PER_ELEMENT !== undefined ) {
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taskConfig.attributeTypes[ attribute ] = type.name;
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}
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}
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//
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var taskKey = JSON.stringify( taskConfig );
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// Check for an existing task using this buffer. A transferred buffer cannot be transferred
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// again from this thread.
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if ( DRACOLoader.taskCache.has( buffer ) ) {
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var cachedTask = DRACOLoader.taskCache.get( buffer );
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if ( cachedTask.key === taskKey ) {
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return cachedTask.promise;
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} else if ( buffer.byteLength === 0 ) {
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// Technically, it would be possible to wait for the previous task to complete,
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// transfer the buffer back, and decode again with the second configuration. That
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// is complex, and I don't know of any reason to decode a Draco buffer twice in
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// different ways, so this is left unimplemented.
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throw new Error(
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'THREE.DRACOLoader: Unable to re-decode a buffer with different ' +
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'settings. Buffer has already been transferred.'
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);
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}
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}
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//
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var worker;
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var taskID = this.workerNextTaskID ++;
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var taskCost = buffer.byteLength;
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// Obtain a worker and assign a task, and construct a geometry instance
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// when the task completes.
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var geometryPending = this._getWorker( taskID, taskCost )
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.then( ( _worker ) => {
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worker = _worker;
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return new Promise( ( resolve, reject ) => {
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worker._callbacks[ taskID ] = { resolve, reject };
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worker.postMessage( { type: 'decode', id: taskID, taskConfig, buffer }, [ buffer ] );
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// this.debug();
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} );
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} )
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.then( ( message ) => this._createGeometry( message.geometry ) );
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// Remove task from the task list.
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// Note: replaced '.finally()' with '.catch().then()' block - iOS 11 support (#19416)
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geometryPending
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.catch( () => true )
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.then( () => {
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if ( worker && taskID ) {
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this._releaseTask( worker, taskID );
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// this.debug();
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}
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} );
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// Cache the task result.
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DRACOLoader.taskCache.set( buffer, {
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key: taskKey,
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promise: geometryPending
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} );
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return geometryPending;
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},
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_createGeometry: function ( geometryData ) {
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var geometry = new BufferGeometry();
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if ( geometryData.index ) {
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geometry.setIndex( new BufferAttribute( geometryData.index.array, 1 ) );
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}
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for ( var i = 0; i < geometryData.attributes.length; i ++ ) {
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var attribute = geometryData.attributes[ i ];
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var name = attribute.name;
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var array = attribute.array;
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var itemSize = attribute.itemSize;
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geometry.setAttribute( name, new BufferAttribute( array, itemSize ) );
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}
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return geometry;
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},
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_loadLibrary: function ( url, responseType ) {
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var loader = new 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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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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var useJS = typeof WebAssembly !== 'object' || this.decoderConfig.type === 'js';
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var 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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var jsContent = libraries[ 0 ];
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if ( ! useJS ) {
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this.decoderConfig.wasmBinary = libraries[ 1 ];
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}
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var fn = DRACOLoader.DRACOWorker.toString();
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var body = [
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'/* draco decoder */',
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jsContent,
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'',
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'/* worker */',
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fn.substring( fn.indexOf( '{' ) + 1, fn.lastIndexOf( '}' ) )
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].join( '\n' );
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this.workerSourceURL = URL.createObjectURL( new Blob( [ body ] ) );
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} );
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return this.decoderPending;
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},
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_getWorker: function ( taskID, taskCost ) {
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return this._initDecoder().then( () => {
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if ( this.workerPool.length < this.workerLimit ) {
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var worker = new Worker( this.workerSourceURL );
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worker._callbacks = {};
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worker._taskCosts = {};
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worker._taskLoad = 0;
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worker.postMessage( { type: 'init', decoderConfig: this.decoderConfig } );
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worker.onmessage = function ( e ) {
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var message = e.data;
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switch ( message.type ) {
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case 'decode':
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worker._callbacks[ message.id ].resolve( message );
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break;
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case 'error':
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worker._callbacks[ message.id ].reject( message );
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break;
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default:
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console.error( 'THREE.DRACOLoader: Unexpected message, "' + message.type + '"' );
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}
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};
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this.workerPool.push( worker );
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} else {
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this.workerPool.sort( function ( a, b ) {
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return a._taskLoad > b._taskLoad ? - 1 : 1;
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} );
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}
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var worker = this.workerPool[ this.workerPool.length - 1 ];
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worker._taskCosts[ taskID ] = taskCost;
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worker._taskLoad += taskCost;
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return worker;
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} );
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},
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_releaseTask: function ( worker, taskID ) {
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worker._taskLoad -= worker._taskCosts[ taskID ];
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delete worker._callbacks[ taskID ];
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delete worker._taskCosts[ taskID ];
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},
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debug: function () {
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console.log( 'Task load: ', this.workerPool.map( ( worker ) => worker._taskLoad ) );
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},
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dispose: function () {
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for ( var i = 0; i < this.workerPool.length; ++ i ) {
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this.workerPool[ i ].terminate();
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}
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this.workerPool.length = 0;
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return this;
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}
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} );
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/* WEB WORKER */
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DRACOLoader.DRACOWorker = function () {
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var decoderConfig;
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var decoderPending;
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onmessage = function ( e ) {
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var message = e.data;
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switch ( message.type ) {
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case 'init':
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decoderConfig = message.decoderConfig;
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decoderPending = new Promise( function ( resolve/*, reject*/ ) {
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decoderConfig.onModuleLoaded = function ( draco ) {
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// Module is Promise-like. Wrap before resolving to avoid loop.
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resolve( { draco: draco } );
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};
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DracoDecoderModule( decoderConfig ); // eslint-disable-line no-undef
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} );
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break;
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case 'decode':
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var buffer = message.buffer;
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var taskConfig = message.taskConfig;
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decoderPending.then( ( module ) => {
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var draco = module.draco;
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var decoder = new draco.Decoder();
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var decoderBuffer = new draco.DecoderBuffer();
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decoderBuffer.Init( new Int8Array( buffer ), buffer.byteLength );
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try {
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var geometry = decodeGeometry( draco, decoder, decoderBuffer, taskConfig );
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var buffers = geometry.attributes.map( ( attr ) => attr.array.buffer );
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if ( geometry.index ) buffers.push( geometry.index.array.buffer );
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self.postMessage( { type: 'decode', id: message.id, geometry }, buffers );
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} catch ( error ) {
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console.error( error );
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self.postMessage( { type: 'error', id: message.id, error: error.message } );
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} finally {
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draco.destroy( decoderBuffer );
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draco.destroy( decoder );
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}
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} );
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break;
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}
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};
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function decodeGeometry( draco, decoder, decoderBuffer, taskConfig ) {
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var attributeIDs = taskConfig.attributeIDs;
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var attributeTypes = taskConfig.attributeTypes;
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var dracoGeometry;
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var decodingStatus;
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var geometryType = decoder.GetEncodedGeometryType( decoderBuffer );
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if ( geometryType === draco.TRIANGULAR_MESH ) {
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dracoGeometry = new draco.Mesh();
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decodingStatus = decoder.DecodeBufferToMesh( decoderBuffer, dracoGeometry );
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} else if ( geometryType === draco.POINT_CLOUD ) {
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dracoGeometry = new draco.PointCloud();
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decodingStatus = decoder.DecodeBufferToPointCloud( decoderBuffer, dracoGeometry );
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} else {
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throw new Error( 'THREE.DRACOLoader: Unexpected geometry type.' );
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}
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if ( ! decodingStatus.ok() || dracoGeometry.ptr === 0 ) {
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throw new Error( 'THREE.DRACOLoader: Decoding failed: ' + decodingStatus.error_msg() );
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}
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var geometry = { index: null, attributes: [] };
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// Gather all vertex attributes.
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for ( var attributeName in attributeIDs ) {
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var attributeType = self[ attributeTypes[ attributeName ] ];
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var attribute;
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var attributeID;
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// A Draco file may be created with default vertex attributes, whose attribute IDs
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// are mapped 1:1 from their semantic name (POSITION, NORMAL, ...). Alternatively,
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// a Draco file may contain a custom set of attributes, identified by known unique
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// IDs. glTF files always do the latter, and `.drc` files typically do the former.
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if ( taskConfig.useUniqueIDs ) {
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attributeID = attributeIDs[ attributeName ];
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attribute = decoder.GetAttributeByUniqueId( dracoGeometry, attributeID );
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} else {
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attributeID = decoder.GetAttributeId( dracoGeometry, draco[ attributeIDs[ attributeName ] ] );
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if ( attributeID === - 1 ) continue;
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attribute = decoder.GetAttribute( dracoGeometry, attributeID );
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}
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geometry.attributes.push( decodeAttribute( draco, decoder, dracoGeometry, attributeName, attributeType, attribute ) );
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}
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// Add index.
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if ( geometryType === draco.TRIANGULAR_MESH ) {
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geometry.index = decodeIndex( draco, decoder, dracoGeometry );
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}
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draco.destroy( dracoGeometry );
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return geometry;
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}
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function decodeIndex( draco, decoder, dracoGeometry ) {
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var numFaces = dracoGeometry.num_faces();
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var numIndices = numFaces * 3;
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var byteLength = numIndices * 4;
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var ptr = draco._malloc( byteLength );
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decoder.GetTrianglesUInt32Array( dracoGeometry, byteLength, ptr );
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var index = new Uint32Array( draco.HEAPF32.buffer, ptr, numIndices ).slice();
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draco._free( ptr );
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return { array: index, itemSize: 1 };
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}
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function decodeAttribute( draco, decoder, dracoGeometry, attributeName, attributeType, attribute ) {
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var numComponents = attribute.num_components();
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var numPoints = dracoGeometry.num_points();
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var numValues = numPoints * numComponents;
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var byteLength = numValues * attributeType.BYTES_PER_ELEMENT;
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var dataType = getDracoDataType( draco, attributeType );
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var ptr = draco._malloc( byteLength );
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decoder.GetAttributeDataArrayForAllPoints( dracoGeometry, attribute, dataType, byteLength, ptr );
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var array = new attributeType( draco.HEAPF32.buffer, ptr, numValues ).slice();
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draco._free( ptr );
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return {
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name: attributeName,
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array: array,
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itemSize: numComponents
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};
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}
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function getDracoDataType( draco, attributeType ) {
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switch ( attributeType ) {
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case Float32Array: return draco.DT_FLOAT32;
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case Int8Array: return draco.DT_INT8;
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case Int16Array: return draco.DT_INT16;
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case Int32Array: return draco.DT_INT32;
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case Uint8Array: return draco.DT_UINT8;
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case Uint16Array: return draco.DT_UINT16;
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case Uint32Array: return draco.DT_UINT32;
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}
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}
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};
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DRACOLoader.taskCache = new WeakMap();
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|
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/** Deprecated static methods */
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|
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/** @deprecated */
|
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DRACOLoader.setDecoderPath = function () {
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|
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console.warn( 'THREE.DRACOLoader: The .setDecoderPath() method has been removed. Use instance methods.' );
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};
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|
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/** @deprecated */
|
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DRACOLoader.setDecoderConfig = function () {
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console.warn( 'THREE.DRACOLoader: The .setDecoderConfig() method has been removed. Use instance methods.' );
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};
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|
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/** @deprecated */
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DRACOLoader.releaseDecoderModule = function () {
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console.warn( 'THREE.DRACOLoader: The .releaseDecoderModule() method has been removed. Use instance methods.' );
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};
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/** @deprecated */
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DRACOLoader.getDecoderModule = function () {
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console.warn( 'THREE.DRACOLoader: The .getDecoderModule() method has been removed. Use instance methods.' );
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};
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THREE.DRACOLoader = DRACOLoader; |