Initial commit

public/assets/iflow-engine-base.css

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+.originRotate{width:10px;height:10px;background-color:red}.originDiv{position:absolute;top:100px;left:100px;width:30px;height:30px;border-radius:50%;z-index:1000;pointer-events:none}.catchPoint{pointer-events:none;fill:#00f;stroke:#fff;stroke-width:1}.catchLine{position:absolute;width:10px;height:10px;pointer-events:none;background-color:green}.catchPlane{position:absolute;width:10px;height:10px;pointer-events:none;background-color:#ff0}.ViewCube{position:absolute;width:120px;height:120px;top:0;right:0;z-index:999}.homeViewWrapper{position:absolute;cursor:pointer;pointer-events:auto;background-image:url(/assets/viewcube/home.png);background-size:100% 100%;background-repeat:no-repeat;background-color:#fff0;color:#fff;top:10px;right:100;width:20px;height:20px;z-index:999;user-select:none;-webkit-user-select:none;-moz-user-select:none;-ms-user-select:none}.viewSettingWrapper{position:absolute;cursor:pointer;pointer-events:auto;background-size:100% 100%;background-repeat:no-repeat;font-weight:800;background-color:#fff0;color:#fff;top:30px;right:100;width:20px;height:20px;z-index:999;user-select:none;-webkit-user-select:none;-moz-user-select:none;-ms-user-select:none}.cameraToggleWrapper{position:absolute;cursor:pointer;pointer-events:auto;background-color:#ffffffe6;color:#333;font-size:26px;font-weight:700;display:none;align-items:center;justify-content:center;border-radius:4px;box-shadow:0 2px 4px #0003;transition:all .3s ease;top:70px;right:90px;width:44px;height:44px;z-index:999;user-select:none;-webkit-user-select:none;-moz-user-select:none;-ms-user-select:none}.cameraToggleWrapper.show{display:flex}.cameraToggleWrapper:hover{background-color:#fff;box-shadow:0 3px 6px #0000004d;transform:scale(1.1)}.screenshotWrapper{position:absolute;cursor:pointer;pointer-events:auto;background-color:#ffffffe6;color:#333;font-size:20px;display:none;align-items:center;justify-content:center;border-radius:4px;box-shadow:0 2px 4px #0003;transition:all .3s ease;top:120px;right:90px;width:44px;height:44px;z-index:999;user-select:none;-webkit-user-select:none;-moz-user-select:none;-ms-user-select:none}.screenshotWrapper.show{display:flex}.screenshotWrapper:hover{background-color:#fff;box-shadow:0 3px 6px #0000004d;transform:scale(1.1)}.fullscreenWrapper{position:absolute;cursor:pointer;pointer-events:auto;background-color:#ffffffe6;color:#333;font-size:26px;font-weight:700;display:none;align-items:center;justify-content:center;border-radius:4px;box-shadow:0 2px 4px #0003;transition:all .3s ease;top:170px;right:90px;width:44px;height:44px;z-index:999;user-select:none;-webkit-user-select:none;-moz-user-select:none;-ms-user-select:none}.fullscreenWrapper.show{display:flex}.fullscreenWrapper:hover{background-color:#fff;box-shadow:0 3px 6px #0000004d;transform:scale(1.1)}.measure-elevation{position:absolute;pointer-events:none}.measureSvg{position:absolute;width:1920px;height:1080px}.catch-point{position:absolute;width:10px;height:10px;background-color:red;border-radius:50%;pointer-events:none}.annotation-container{position:absolute;pointer-events:none;top:0;left:0}.measureLine{position:absolute;pointer-events:none}.measureBack{cursor:pointer;pointer-events:auto;fill:orange;top:-50px;rx:5;ry:5}.measureLabel{position:absolute;fill:#fff;font-size:14px;font-family:Arial,sans-serif;pointer-events:none}.measurePointer{fill:orange}.Hight{stroke:#fff;stroke-width:2}.allow-select{pointer-events:auto}.disallow-select{pointer-events:none}.angle-annotation{position:absolute;pointer-events:auto}

public/assets/svg/rotate-orbit.svg

@@ -0,0 +1 @@
+<?xml version="1.0" standalone="no"?><!DOCTYPE svg PUBLIC "-//W3C//DTD SVG 1.1//EN" "http://www.w3.org/Graphics/SVG/1.1/DTD/svg11.dtd"><svg t="1767704478351" class="icon" viewBox="0 0 1024 1024" version="1.1" xmlns="http://www.w3.org/2000/svg" p-id="5751" width="32" height="32" xmlns:xlink="http://www.w3.org/1999/xlink"><path d="M341.333333 608L202.666667 469.333333H298.666667c10.666667-239.36 101.973333-426.666667 213.333333-426.666666 85.333333 0 160.853333 112.64 194.133333 275.2C868.693333 351.146667 981.333333 426.666667 981.333333 512c0 78.08-92.586667 146.346667-230.4 183.466667l12.373334-86.613334C844.8 585.386667 896 550.826667 896 512c0-45.226667-70.4-85.333333-176.213333-106.666667 3.413333 33.706667 5.546667 69.546667 5.546666 106.666667 0 259.413333-95.573333 469.333333-213.333333 469.333333-78.08 0-146.346667-92.586667-183.466667-230.4l86.613334 12.373334C438.613333 844.8 473.173333 896 512 896c70.826667 0 128-171.946667 128-384 0-42.666667-2.133333-83.2-6.4-121.6C595.2 386.133333 554.666667 384 512 384l-79.36 2.56 12.373333-85.76L512 298.666667c37.12 0 72.96 2.133333 106.666667 5.546666C597.333333 198.4 557.226667 128 512 128c-65.706667 0-120.32 149.333333-128 341.333333h96L341.333333 608M608 682.666667L469.333333 821.333333V725.333333c-239.36-10.666667-426.666667-101.973333-426.666666-213.333333 0-78.08 92.586667-146.346667 230.4-183.466667l-12.373334 86.613334C179.2 438.613333 128 473.173333 128 512c0 65.706667 149.333333 120.32 341.333333 128v-96L608 682.666667z" p-id="5752" fill="#1afa29"></path></svg>

public/draco/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 };

public/draco/draco_wasm_wrapper.js

@@ -0,0 +1,104 @@
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+$jscomp.getGlobal=function(f){return"undefined"!=typeof window&&window===f?f:"undefined"!=typeof global&&null!=global?global:f};$jscomp.global=$jscomp.getGlobal(this);$jscomp.ASSUME_ES5=!1;$jscomp.ASSUME_NO_NATIVE_MAP=!1;$jscomp.ASSUME_NO_NATIVE_SET=!1;$jscomp.SIMPLE_FROUND_POLYFILL=!1;$jscomp.defineProperty=$jscomp.ASSUME_ES5||"function"==typeof Object.defineProperties?Object.defineProperty:function(f,m,v){f!=Array.prototype&&f!=Object.prototype&&(f[m]=v.value)};
+$jscomp.polyfill=function(f,m,v,t){if(m){v=$jscomp.global;f=f.split(".");for(t=0;t<f.length-1;t++){var h=f[t];h in v||(v[h]={});v=v[h]}f=f[f.length-1];t=v[f];m=m(t);m!=t&&null!=m&&$jscomp.defineProperty(v,f,{configurable:!0,writable:!0,value:m})}};$jscomp.FORCE_POLYFILL_PROMISE=!1;
+$jscomp.polyfill("Promise",function(f){function m(){this.batch_=null}function v(e){return e instanceof h?e:new h(function(l,f){l(e)})}if(f&&!$jscomp.FORCE_POLYFILL_PROMISE)return f;m.prototype.asyncExecute=function(e){if(null==this.batch_){this.batch_=[];var l=this;this.asyncExecuteFunction(function(){l.executeBatch_()})}this.batch_.push(e)};var t=$jscomp.global.setTimeout;m.prototype.asyncExecuteFunction=function(e){t(e,0)};m.prototype.executeBatch_=function(){for(;this.batch_&&this.batch_.length;){var e=
+this.batch_;this.batch_=[];for(var l=0;l<e.length;++l){var f=e[l];e[l]=null;try{f()}catch(z){this.asyncThrow_(z)}}}this.batch_=null};m.prototype.asyncThrow_=function(e){this.asyncExecuteFunction(function(){throw e;})};var h=function(e){this.state_=0;this.result_=void 0;this.onSettledCallbacks_=[];var l=this.createResolveAndReject_();try{e(l.resolve,l.reject)}catch(S){l.reject(S)}};h.prototype.createResolveAndReject_=function(){function e(e){return function(h){f||(f=!0,e.call(l,h))}}var l=this,f=!1;
+return{resolve:e(this.resolveTo_),reject:e(this.reject_)}};h.prototype.resolveTo_=function(e){if(e===this)this.reject_(new TypeError("A Promise cannot resolve to itself"));else if(e instanceof h)this.settleSameAsPromise_(e);else{a:switch(typeof e){case "object":var l=null!=e;break a;case "function":l=!0;break a;default:l=!1}l?this.resolveToNonPromiseObj_(e):this.fulfill_(e)}};h.prototype.resolveToNonPromiseObj_=function(e){var l=void 0;try{l=e.then}catch(S){this.reject_(S);return}"function"==typeof l?
+this.settleSameAsThenable_(l,e):this.fulfill_(e)};h.prototype.reject_=function(e){this.settle_(2,e)};h.prototype.fulfill_=function(e){this.settle_(1,e)};h.prototype.settle_=function(e,l){if(0!=this.state_)throw Error("Cannot settle("+e+", "+l+"): Promise already settled in state"+this.state_);this.state_=e;this.result_=l;this.executeOnSettledCallbacks_()};h.prototype.executeOnSettledCallbacks_=function(){if(null!=this.onSettledCallbacks_){for(var e=0;e<this.onSettledCallbacks_.length;++e)X.asyncExecute(this.onSettledCallbacks_[e]);
+this.onSettledCallbacks_=null}};var X=new m;h.prototype.settleSameAsPromise_=function(e){var l=this.createResolveAndReject_();e.callWhenSettled_(l.resolve,l.reject)};h.prototype.settleSameAsThenable_=function(e,l){var f=this.createResolveAndReject_();try{e.call(l,f.resolve,f.reject)}catch(z){f.reject(z)}};h.prototype.then=function(e,f){function l(e,f){return"function"==typeof e?function(f){try{m(e(f))}catch(p){v(p)}}:f}var m,v,t=new h(function(e,f){m=e;v=f});this.callWhenSettled_(l(e,m),l(f,v));return t};
+h.prototype.catch=function(e){return this.then(void 0,e)};h.prototype.callWhenSettled_=function(e,f){function l(){switch(h.state_){case 1:e(h.result_);break;case 2:f(h.result_);break;default:throw Error("Unexpected state: "+h.state_);}}var h=this;null==this.onSettledCallbacks_?X.asyncExecute(l):this.onSettledCallbacks_.push(l)};h.resolve=v;h.reject=function(e){return new h(function(f,h){h(e)})};h.race=function(e){return new h(function(f,h){for(var l=$jscomp.makeIterator(e),m=l.next();!m.done;m=l.next())v(m.value).callWhenSettled_(f,
+h)})};h.all=function(e){var f=$jscomp.makeIterator(e),m=f.next();return m.done?v([]):new h(function(e,h){function l(f){return function(h){t[f]=h;z--;0==z&&e(t)}}var t=[],z=0;do t.push(void 0),z++,v(m.value).callWhenSettled_(l(t.length-1),h),m=f.next();while(!m.done)})};return h},"es6","es3");
+var DracoDecoderModule=function(){var f="undefined"!==typeof document&&document.currentScript?document.currentScript.src:void 0;"undefined"!==typeof __filename&&(f=f||__filename);return function(m){function v(k){return a.locateFile?a.locateFile(k,M):M+k}function t(a,c){a||z("Assertion failed: "+c)}function h(a,c,b){var d=c+b;for(b=c;a[b]&&!(b>=d);)++b;if(16<b-c&&a.subarray&&xa)return xa.decode(a.subarray(c,b));for(d="";c<b;){var k=a[c++];if(k&128){var e=a[c++]&63;if(192==(k&224))d+=String.fromCharCode((k&
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+a.HEAPF32=new Float32Array(k);a.HEAPF64=new Float64Array(k)}function S(k){for(;0<k.length;){var c=k.shift();if("function"==typeof c)c();else{var b=c.func;"number"===typeof b?void 0===c.arg?a.dynCall_v(b):a.dynCall_vi(b,c.arg):b(void 0===c.arg?null:c.arg)}}}function z(k){if(a.onAbort)a.onAbort(k);k+="";ya(k);Y(k);za=!0;throw new WebAssembly.RuntimeError("abort("+k+"). Build with -s ASSERTIONS=1 for more info.");}function va(a){return String.prototype.startsWith?a.startsWith("data:application/octet-stream;base64,"):
+0===a.indexOf("data:application/octet-stream;base64,")}function wa(){try{if(da)return new Uint8Array(da);if(la)return la(U);throw"both async and sync fetching of the wasm failed";}catch(k){z(k)}}function Ma(){return da||!ea&&!Z||"function"!==typeof fetch?new Promise(function(a,c){a(wa())}):fetch(U,{credentials:"same-origin"}).then(function(a){if(!a.ok)throw"failed to load wasm binary file at '"+U+"'";return a.arrayBuffer()}).catch(function(){return wa()})}function ba(){if(!ba.strings){var a={USER:"web_user",
+LOGNAME:"web_user",PATH:"/",PWD:"/",HOME:"/home/web_user",LANG:("object"===typeof navigator&&navigator.languages&&navigator.languages[0]||"C").replace("-","_")+".UTF-8",_:na},c;for(c in Aa)a[c]=Aa[c];var b=[];for(c in a)b.push(c+"="+a[c]);ba.strings=b}return ba.strings}function ma(k){function c(){if(!fa&&(fa=!0,!za)){Ba=!0;S(Ca);S(Da);if(a.onRuntimeInitialized)a.onRuntimeInitialized();if(a.postRun)for("function"==typeof a.postRun&&(a.postRun=[a.postRun]);a.postRun.length;)Ea.unshift(a.postRun.shift());
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