feat: initialize project with core dependencies and game entry point

node_modules/three/examples/jsm/loaders/DRACOLoader.js

@@ -0,0 +1,739 @@
+import {
+	BufferAttribute,
+	BufferGeometry,
+	Color,
+	ColorManagement,
+	FileLoader,
+	Loader,
+	LinearSRGBColorSpace,
+	SRGBColorSpace,
+	InterleavedBuffer,
+	InterleavedBufferAttribute
+} from 'three';
+
+const _taskCache = new WeakMap();
+
+/**
+ * A loader for the Draco format.
+ *
+ * [Draco](https://google.github.io/draco/) is an open source library for compressing
+ * and decompressing 3D meshes and point clouds. Compressed geometry can be significantly smaller,
+ * at the cost of additional decoding time on the client device.
+ *
+ * Standalone Draco files have a `.drc` extension, and contain vertex positions, normals, colors,
+ * and other attributes. Draco files do not contain materials, textures, animation, or node hierarchies –
+ * to use these features, embed Draco geometry inside of a glTF file. A normal glTF file can be converted
+ * to a Draco-compressed glTF file using [glTF-Pipeline](https://github.com/CesiumGS/gltf-pipeline).
+ * When using Draco with glTF, an instance of `DRACOLoader` will be used internally by {@link GLTFLoader}.
+ *
+ * It is recommended to create one DRACOLoader instance and reuse it to avoid loading and creating
+ * multiple decoder instances.
+ *
+ * `DRACOLoader` will automatically use either the JS or the WASM decoding library, based on
+ * browser capabilities.
+ *
+ * ```js
+ * const loader = new DRACOLoader();
+ * loader.setDecoderPath( '/examples/jsm/libs/draco/' );
+ *
+ * const geometry = await dracoLoader.loadAsync( 'models/draco/bunny.drc' );
+ * geometry.computeVertexNormals(); // optional
+ *
+ * dracoLoader.dispose();
+ * ```
+ *
+ * @augments Loader
+ * @three_import import { DRACOLoader } from 'three/addons/loaders/DRACOLoader.js';
+ */
+class DRACOLoader extends Loader {
+
+	/**
+	 * Constructs a new Draco loader.
+	 *
+	 * @param {LoadingManager} [manager] - The loading manager.
+	 */
+	constructor( manager ) {
+
+		super( manager );
+
+		this.decoderPath = '';
+		this.decoderConfig = {};
+		this.decoderBinary = null;
+		this.decoderPending = null;
+
+		this.workerLimit = 4;
+		this.workerPool = [];
+		this.workerNextTaskID = 1;
+		this.workerSourceURL = '';
+
+		this.defaultAttributeIDs = {
+			position: 'POSITION',
+			normal: 'NORMAL',
+			color: 'COLOR',
+			uv: 'TEX_COORD'
+		};
+		this.defaultAttributeTypes = {
+			position: 'Float32Array',
+			normal: 'Float32Array',
+			color: 'Float32Array',
+			uv: 'Float32Array'
+		};
+
+	}
+
+	/**
+	 * Provides configuration for the decoder libraries. Configuration cannot be changed after decoding begins.
+	 *
+	 * @param {string} path - The decoder path.
+	 * @return {DRACOLoader} A reference to this loader.
+	 */
+	setDecoderPath( path ) {
+
+		this.decoderPath = path;
+
+		return this;
+
+	}
+
+	/**
+	 * Provides configuration for the decoder libraries. Configuration cannot be changed after decoding begins.
+	 *
+	 * @param {{type:('js'|'wasm')}} config - The decoder config.
+	 * @return {DRACOLoader} A reference to this loader.
+	 */
+	setDecoderConfig( config ) {
+
+		this.decoderConfig = config;
+
+		return this;
+
+	}
+
+	/**
+	 * Sets the maximum number of Web Workers to be used during decoding.
+	 * A lower limit may be preferable if workers are also for other tasks in the application.
+	 *
+	 * @param {number} workerLimit - The worker limit.
+	 * @return {DRACOLoader} A reference to this loader.
+	 */
+	setWorkerLimit( workerLimit ) {
+
+		this.workerLimit = workerLimit;
+
+		return this;
+
+	}
+
+	/**
+	 * Starts loading from the given URL and passes the loaded Draco asset
+	 * to the `onLoad()` callback.
+	 *
+	 * @param {string} url - The path/URL of the file to be loaded. This can also be a data URI.
+	 * @param {function(BufferGeometry)} onLoad - Executed when the loading process has been finished.
+	 * @param {onProgressCallback} onProgress - Executed while the loading is in progress.
+	 * @param {onErrorCallback} onError - Executed when errors occur.
+	 */
+	load( url, onLoad, onProgress, onError ) {
+
+		const loader = new FileLoader( this.manager );
+
+		loader.setPath( this.path );
+		loader.setResponseType( 'arraybuffer' );
+		loader.setRequestHeader( this.requestHeader );
+		loader.setWithCredentials( this.withCredentials );
+
+		loader.load( url, ( buffer ) => {
+
+			this.parse( buffer, onLoad, onError );
+
+		}, onProgress, onError );
+
+	}
+
+	/**
+	 * Parses the given Draco data.
+	 *
+	 * @param {ArrayBuffer} buffer - The raw Draco data as an array buffer.
+	 * @param {function(BufferGeometry)} onLoad - Executed when the loading/parsing process has been finished.
+	 * @param {onErrorCallback} onError - Executed when errors occur.
+	 */
+	parse( buffer, onLoad, onError = ()=>{} ) {
+
+		this.decodeDracoFile( buffer, onLoad, null, null, SRGBColorSpace, onError ).catch( onError );
+
+	}
+
+	//
+
+	decodeDracoFile( buffer, callback, attributeIDs, attributeTypes, vertexColorSpace = LinearSRGBColorSpace, onError = () => {} ) {
+
+		const taskConfig = {
+			attributeIDs: attributeIDs || this.defaultAttributeIDs,
+			attributeTypes: attributeTypes || this.defaultAttributeTypes,
+			useUniqueIDs: !! attributeIDs,
+			vertexColorSpace: vertexColorSpace,
+		};
+
+		return this.decodeGeometry( buffer, taskConfig ).then( callback ).catch( onError );
+
+	}
+
+	decodeGeometry( buffer, taskConfig ) {
+
+		const taskKey = JSON.stringify( taskConfig );
+
+		// Check for an existing task using this buffer. A transferred buffer cannot be transferred
+		// again from this thread.
+		if ( _taskCache.has( buffer ) ) {
+
+			const cachedTask = _taskCache.get( buffer );
+
+			if ( cachedTask.key === taskKey ) {
+
+				return cachedTask.promise;
+
+			} else if ( buffer.byteLength === 0 ) {
+
+				// Technically, it would be possible to wait for the previous task to complete,
+				// transfer the buffer back, and decode again with the second configuration. That
+				// is complex, and I don't know of any reason to decode a Draco buffer twice in
+				// different ways, so this is left unimplemented.
+				throw new Error(
+
+					'THREE.DRACOLoader: Unable to re-decode a buffer with different ' +
+					'settings. Buffer has already been transferred.'
+
+				);
+
+			}
+
+		}
+
+		//
+
+		let worker;
+		const taskID = this.workerNextTaskID ++;
+		const taskCost = buffer.byteLength;
+
+		// Obtain a worker and assign a task, and construct a geometry instance
+		// when the task completes.
+		const geometryPending = this._getWorker( taskID, taskCost )
+			.then( ( _worker ) => {
+
+				worker = _worker;
+
+				return new Promise( ( resolve, reject ) => {
+
+					worker._callbacks[ taskID ] = { resolve, reject };
+
+					worker.postMessage( { type: 'decode', id: taskID, taskConfig, buffer }, [ buffer ] );
+
+					// this.debug();
+
+				} );
+
+			} )
+			.then( ( message ) => this._createGeometry( message.geometry ) );
+
+		// Remove task from the task list.
+		// Note: replaced '.finally()' with '.catch().then()' block - iOS 11 support (#19416)
+		geometryPending
+			.catch( () => true )
+			.then( () => {
+
+				if ( worker && taskID ) {
+
+					this._releaseTask( worker, taskID );
+
+					// this.debug();
+
+				}
+
+			} );
+
+		// Cache the task result.
+		_taskCache.set( buffer, {
+
+			key: taskKey,
+			promise: geometryPending
+
+		} );
+
+		return geometryPending;
+
+	}
+
+	_createGeometry( geometryData ) {
+
+		const geometry = new BufferGeometry();
+
+		if ( geometryData.index ) {
+
+			geometry.setIndex( new BufferAttribute( geometryData.index.array, 1 ) );
+
+		}
+
+		for ( let i = 0; i < geometryData.attributes.length; i ++ ) {
+
+			const { name, array, itemSize, stride, vertexColorSpace } = geometryData.attributes[ i ];
+
+			let attribute;
+
+			if ( itemSize === stride ) {
+
+				attribute = new BufferAttribute( array, itemSize );
+
+			} else {
+
+				const buffer = new InterleavedBuffer( array, stride );
+
+				attribute = new InterleavedBufferAttribute( buffer, itemSize, 0 );
+
+			}
+
+			if ( name === 'color' ) {
+
+				this._assignVertexColorSpace( attribute, vertexColorSpace );
+
+				attribute.normalized = ( array instanceof Float32Array ) === false;
+
+			}
+
+			geometry.setAttribute( name, attribute );
+
+		}
+
+		return geometry;
+
+	}
+
+	_assignVertexColorSpace( attribute, inputColorSpace ) {
+
+		// While .drc files do not specify colorspace, the only 'official' tooling
+		// is PLY and OBJ converters, which use sRGB. We'll assume sRGB when a .drc
+		// file is passed into .load() or .parse(). GLTFLoader uses internal APIs
+		// to decode geometry, and vertex colors are already Linear-sRGB in there.
+
+		if ( inputColorSpace !== SRGBColorSpace ) return;
+
+		const _color = new Color();
+
+		for ( let i = 0, il = attribute.count; i < il; i ++ ) {
+
+			_color.fromBufferAttribute( attribute, i );
+			ColorManagement.colorSpaceToWorking( _color, SRGBColorSpace );
+			attribute.setXYZ( i, _color.r, _color.g, _color.b );
+
+		}
+
+	}
+
+	_loadLibrary( url, responseType ) {
+
+		const loader = new FileLoader( this.manager );
+		loader.setPath( this.decoderPath );
+		loader.setResponseType( responseType );
+		loader.setWithCredentials( this.withCredentials );
+
+		return new Promise( ( resolve, reject ) => {
+
+			loader.load( url, resolve, undefined, reject );
+
+		} );
+
+	}
+
+	preload() {
+
+		this._initDecoder();
+
+		return this;
+
+	}
+
+	_initDecoder() {
+
+		if ( this.decoderPending ) return this.decoderPending;
+
+		const useJS = typeof WebAssembly !== 'object' || this.decoderConfig.type === 'js';
+		const librariesPending = [];
+
+		if ( useJS ) {
+
+			librariesPending.push( this._loadLibrary( 'draco_decoder.js', 'text' ) );
+
+		} else {
+
+			librariesPending.push( this._loadLibrary( 'draco_wasm_wrapper.js', 'text' ) );
+			librariesPending.push( this._loadLibrary( 'draco_decoder.wasm', 'arraybuffer' ) );
+
+		}
+
+		this.decoderPending = Promise.all( librariesPending )
+			.then( ( libraries ) => {
+
+				const jsContent = libraries[ 0 ];
+
+				if ( ! useJS ) {
+
+					this.decoderConfig.wasmBinary = libraries[ 1 ];
+
+				}
+
+				const fn = DRACOWorker.toString();
+
+				const body = [
+					'/* draco decoder */',
+					jsContent,
+					'',
+					'/* worker */',
+					fn.substring( fn.indexOf( '{' ) + 1, fn.lastIndexOf( '}' ) )
+				].join( '\n' );
+
+				this.workerSourceURL = URL.createObjectURL( new Blob( [ body ] ) );
+
+			} );
+
+		return this.decoderPending;
+
+	}
+
+	_getWorker( taskID, taskCost ) {
+
+		return this._initDecoder().then( () => {
+
+			if ( this.workerPool.length < this.workerLimit ) {
+
+				const worker = new Worker( this.workerSourceURL );
+
+				worker._callbacks = {};
+				worker._taskCosts = {};
+				worker._taskLoad = 0;
+
+				worker.postMessage( { type: 'init', decoderConfig: this.decoderConfig } );
+
+				worker.onmessage = function ( e ) {
+
+					const message = e.data;
+
+					switch ( message.type ) {
+
+						case 'decode':
+							worker._callbacks[ message.id ].resolve( message );
+							break;
+
+						case 'error':
+							worker._callbacks[ message.id ].reject( message );
+							break;
+
+						default:
+							console.error( 'THREE.DRACOLoader: Unexpected message, "' + message.type + '"' );
+
+					}
+
+				};
+
+				this.workerPool.push( worker );
+
+			} else {
+
+				this.workerPool.sort( function ( a, b ) {
+
+					return a._taskLoad > b._taskLoad ? - 1 : 1;
+
+				} );
+
+			}
+
+			const worker = this.workerPool[ this.workerPool.length - 1 ];
+			worker._taskCosts[ taskID ] = taskCost;
+			worker._taskLoad += taskCost;
+			return worker;
+
+		} );
+
+	}
+
+	_releaseTask( worker, taskID ) {
+
+		worker._taskLoad -= worker._taskCosts[ taskID ];
+		delete worker._callbacks[ taskID ];
+		delete worker._taskCosts[ taskID ];
+
+	}
+
+	debug() {
+
+		console.log( 'Task load: ', this.workerPool.map( ( worker ) => worker._taskLoad ) );
+
+	}
+
+	dispose() {
+
+		for ( let i = 0; i < this.workerPool.length; ++ i ) {
+
+			this.workerPool[ i ].terminate();
+
+		}
+
+		this.workerPool.length = 0;
+
+		if ( this.workerSourceURL !== '' ) {
+
+			URL.revokeObjectURL( this.workerSourceURL );
+
+		}
+
+		return this;
+
+	}
+
+}
+
+/* WEB WORKER */
+
+function DRACOWorker() {
+
+	let decoderConfig;
+	let decoderPending;
+
+	onmessage = function ( e ) {
+
+		const message = e.data;
+
+		switch ( message.type ) {
+
+			case 'init':
+				decoderConfig = message.decoderConfig;
+				decoderPending = new Promise( function ( resolve/*, reject*/ ) {
+
+					decoderConfig.onModuleLoaded = function ( draco ) {
+
+						// Module is Promise-like. Wrap before resolving to avoid loop.
+						resolve( { draco: draco } );
+
+					};
+
+					DracoDecoderModule( decoderConfig ); // eslint-disable-line no-undef
+
+				} );
+				break;
+
+			case 'decode':
+				const buffer = message.buffer;
+				const taskConfig = message.taskConfig;
+				decoderPending.then( ( module ) => {
+
+					const draco = module.draco;
+					const decoder = new draco.Decoder();
+
+					try {
+
+						const geometry = decodeGeometry( draco, decoder, new Int8Array( buffer ), taskConfig );
+
+						const buffers = geometry.attributes.map( ( attr ) => attr.array.buffer );
+
+						if ( geometry.index ) buffers.push( geometry.index.array.buffer );
+
+						self.postMessage( { type: 'decode', id: message.id, geometry }, buffers );
+
+					} catch ( error ) {
+
+						console.error( error );
+
+						self.postMessage( { type: 'error', id: message.id, error: error.message } );
+
+					} finally {
+
+						draco.destroy( decoder );
+
+					}
+
+				} );
+				break;
+
+		}
+
+	};
+
+	function decodeGeometry( draco, decoder, array, taskConfig ) {
+
+		const attributeIDs = taskConfig.attributeIDs;
+		const attributeTypes = taskConfig.attributeTypes;
+
+		let dracoGeometry;
+		let decodingStatus;
+
+		const geometryType = decoder.GetEncodedGeometryType( array );
+
+		if ( geometryType === draco.TRIANGULAR_MESH ) {
+
+			dracoGeometry = new draco.Mesh();
+			decodingStatus = decoder.DecodeArrayToMesh( array, array.byteLength, dracoGeometry );
+
+		} else if ( geometryType === draco.POINT_CLOUD ) {
+
+			dracoGeometry = new draco.PointCloud();
+			decodingStatus = decoder.DecodeArrayToPointCloud( array, array.byteLength, dracoGeometry );
+
+		} else {
+
+			throw new Error( 'THREE.DRACOLoader: Unexpected geometry type.' );
+
+		}
+
+		if ( ! decodingStatus.ok() || dracoGeometry.ptr === 0 ) {
+
+			throw new Error( 'THREE.DRACOLoader: Decoding failed: ' + decodingStatus.error_msg() );
+
+		}
+
+		const geometry = { index: null, attributes: [] };
+
+		// Gather all vertex attributes.
+		for ( const attributeName in attributeIDs ) {
+
+			const attributeType = self[ attributeTypes[ attributeName ] ];
+
+			let attribute;
+			let attributeID;
+
+			// A Draco file may be created with default vertex attributes, whose attribute IDs
+			// are mapped 1:1 from their semantic name (POSITION, NORMAL, ...). Alternatively,
+			// a Draco file may contain a custom set of attributes, identified by known unique
+			// IDs. glTF files always do the latter, and `.drc` files typically do the former.
+			if ( taskConfig.useUniqueIDs ) {
+
+				attributeID = attributeIDs[ attributeName ];
+				attribute = decoder.GetAttributeByUniqueId( dracoGeometry, attributeID );
+
+			} else {
+
+				attributeID = decoder.GetAttributeId( dracoGeometry, draco[ attributeIDs[ attributeName ] ] );
+
+				if ( attributeID === - 1 ) continue;
+
+				attribute = decoder.GetAttribute( dracoGeometry, attributeID );
+
+			}
+
+			const attributeResult = decodeAttribute( draco, decoder, dracoGeometry, attributeName, attributeType, attribute );
+
+			if ( attributeName === 'color' ) {
+
+				attributeResult.vertexColorSpace = taskConfig.vertexColorSpace;
+
+			}
+
+			geometry.attributes.push( attributeResult );
+
+		}
+
+		// Add index.
+		if ( geometryType === draco.TRIANGULAR_MESH ) {
+
+			geometry.index = decodeIndex( draco, decoder, dracoGeometry );
+
+		}
+
+		draco.destroy( dracoGeometry );
+
+		return geometry;
+
+	}
+
+	function decodeIndex( draco, decoder, dracoGeometry ) {
+
+		const numFaces = dracoGeometry.num_faces();
+		const numIndices = numFaces * 3;
+		const byteLength = numIndices * 4;
+
+		const ptr = draco._malloc( byteLength );
+		decoder.GetTrianglesUInt32Array( dracoGeometry, byteLength, ptr );
+		const index = new Uint32Array( draco.HEAPF32.buffer, ptr, numIndices ).slice();
+		draco._free( ptr );
+
+		return { array: index, itemSize: 1 };
+
+	}
+
+	function decodeAttribute( draco, decoder, dracoGeometry, attributeName, TypedArray, attribute ) {
+
+		const count = dracoGeometry.num_points();
+		const itemSize = attribute.num_components();
+		const dracoDataType = getDracoDataType( draco, TypedArray );
+
+		// Reference: https://registry.khronos.org/glTF/specs/2.0/glTF-2.0.html#data-alignment
+		const srcByteStride = itemSize * TypedArray.BYTES_PER_ELEMENT;
+		const dstByteStride = Math.ceil( srcByteStride / 4 ) * 4;
+
+		const dstStride = dstByteStride / TypedArray.BYTES_PER_ELEMENT;
+
+		const srcByteLength = count * srcByteStride;
+		const dstByteLength = count * dstByteStride;
+
+		const ptr = draco._malloc( srcByteLength );
+		decoder.GetAttributeDataArrayForAllPoints( dracoGeometry, attribute, dracoDataType, srcByteLength, ptr );
+
+		const srcArray = new TypedArray( draco.HEAPF32.buffer, ptr, srcByteLength / TypedArray.BYTES_PER_ELEMENT );
+		let dstArray;
+
+		if ( srcByteStride === dstByteStride ) {
+
+			// THREE.BufferAttribute
+
+			dstArray = srcArray.slice();
+
+		} else {
+
+			// THREE.InterleavedBufferAttribute
+
+			dstArray = new TypedArray( dstByteLength / TypedArray.BYTES_PER_ELEMENT );
+
+			let dstOffset = 0;
+
+			for ( let i = 0, il = srcArray.length; i < il; i ++ ) {
+
+				for ( let j = 0; j < itemSize; j ++ ) {
+
+					dstArray[ dstOffset + j ] = srcArray[ i * itemSize + j ];
+
+				}
+
+				dstOffset += dstStride;
+
+			}
+
+		}
+
+		draco._free( ptr );
+
+		return {
+			name: attributeName,
+			count: count,
+			itemSize: itemSize,
+			array: dstArray,
+			stride: dstStride
+		};
+
+	}
+
+	function getDracoDataType( draco, TypedArray ) {
+
+		switch ( TypedArray ) {
+
+			case Float32Array: return draco.DT_FLOAT32;
+			case Int8Array: return draco.DT_INT8;
+			case Int16Array: return draco.DT_INT16;
+			case Int32Array: return draco.DT_INT32;
+			case Uint8Array: return draco.DT_UINT8;
+			case Uint16Array: return draco.DT_UINT16;
+			case Uint32Array: return draco.DT_UINT32;
+
+		}
+
+	}
+
+}
+
+export { DRACOLoader };