feat: 优化测量功能架构与引擎组件

- 重构测量激活逻辑，在 Engine 组件中添加统一的 activateMeasure(mode) 方法
- 简化 MeasureDialogManager，移除冗余的 handleMeasureTypeChange 方法
- 添加 EngineManager.activateMeasure 转发方法
- 修复 loadModel 错误，正确调用 Engine 组件方法
- 为 Engine 组件设置固定背景渐变色
- MeasurePanel 初始化时触发 onModeChange 回调
- 添加 MeasureMode 共享类型定义

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

demo/.gitignore

@@ -1,6 +1,5 @@
 node_modules/
 dist/
-lib/
 .DS_Store
 *.log
 

demo/DEPLOY.md

@@ -0,0 +1,100 @@
+# Demo 部署指南
+
+## 问题说明
+
+部署后出现 `404: Not Found` 错误,找不到 `/static/js/draco/draco_wasm_wrapper.js` 等文件。
+
+这是因为 3D 模型使用了 Draco 压缩,需要 Draco 解码器文件。
+
+## 解决方案
+
+### 需要部署的文件结构
+
+```
+demo/
+├── index.html
+├── viewer.html
+├── lib/
+│   ├── bim-engine-sdk.umd.js
+│   └── bim-engine-sdk.umd.js.map
+├── static/
+│   └── js/
+│       └── draco/
+│           ├── draco_decoder.js
+│           ├── draco_decoder.wasm
+│           ├── draco_encoder.js
+│           ├── draco_wasm_wrapper.js
+│           └── DRACOLoader.js
+└── model/
+    └── test2/
+        └── (模型文件)
+```
+
+### 自动复制文件
+
+在项目根目录执行:
+
+```bash
+# 方法1: 复制所有文件(推荐)
+npm run copy:demo-all
+
+# 方法2: 分步复制
+npm run copy:demo        # 复制 SDK 文件
+npm run copy:demo-draco  # 复制 Draco 文件
+```
+
+在 demo 目录执行:
+
+```bash
+npm run copy-all    # 复制 SDK 和 Draco 文件
+```
+
+### 手动部署步骤
+
+如果自动脚本不可用,手动复制以下文件到服务器:
+
+1. **必需文件**:
+   - `index.html` 或 `viewer.html`
+   - `lib/bim-engine-sdk.umd.js`
+   - `static/js/draco/` 目录下的所有文件
+
+2. **可选文件**:
+   - `lib/bim-engine-sdk.umd.js.map` (用于调试)
+   - `model/` 目录 (如果加载本地模型)
+
+### Nginx 配置示例
+
+```nginx
+server {
+    listen 80;
+    server_name your-domain.com;
+
+    root /var/www/demo;
+    index index.html viewer.html;
+
+    location / {
+        try_files $uri $uri/ /index.html;
+    }
+
+    # 确保 draco 文件可访问
+    location /static/ {
+        expires 1y;
+        add_header Cache-Control "public, immutable";
+    }
+}
+```
+
+## 验证部署
+
+部署后访问以下 URL 确认文件存在:
+
+- `http://your-domain.com/static/js/draco/draco_wasm_wrapper.js`
+- `http://your-domain.com/static/js/draco/draco_decoder.wasm`
+
+如果返回 404,说明文件未正确部署。
+
+## 注意事项
+
+1. **路径硬编码**: Draco 路径在 SDK 中硬编码为 `/static/js/draco/`,请勿修改目录结构
+2. **WASM 文件**: 确保 `.wasm` 文件的 MIME 类型正确配置为 `application/wasm`
+3. **跨域问题**: 如果 draco 文件在不同域名,需要配置 CORS

demo/index.html

@@ -199,7 +199,7 @@
                 const Engine = window.LyzBimEngineSDK.BimEngine;
                 try {
                     engine = new Engine('app', { locale: 'zh-CN' });
-                    // initEngine3D();
+                    initEngine3D();
                     console.log('Engine initialized:', engine);
                 } catch (err) {
                     console.error('Init failed:', err);
@@ -354,6 +354,7 @@
                     engine3DInitialized = true;
                     updateEngineStatus('已初始化');
                     console.log('✅ 3D 引擎初始化成功');
+                    loadModel();
                 } else {
                     updateEngineStatus('初始化失败');
                     console.error('❌ 3D 引擎初始化失败');
@@ -380,7 +381,7 @@
 
             try {
                 // 加载模型文件（从 model 目录）
-                const modelUrl = './model/gujianzhu.glb';
+                const modelUrl = './model/test2';
 
                 engine.engine.loadModel(modelUrl, {
                     position: [0, 0, 0],    // 初始位置
@@ -425,4 +426,4 @@
     </script>
 </body>
 
-</html>
+</html>

demo/package.json

@@ -7,7 +7,9 @@
     "dev": "vite",
     "build": "vite build",
     "preview": "vite preview",
-    "copy-sdk": "mkdir -p lib && cp ../dist/bim-engine-sdk.umd.js lib/ && cp ../dist/bim-engine-sdk.umd.js.map lib/ 2>/dev/null || true"
+    "copy-sdk": "mkdir -p lib && cp ../dist/bim-engine-sdk.umd.js lib/ && cp ../dist/bim-engine-sdk.umd.js.map lib/ 2>/dev/null || true",
+    "copy-draco": "mkdir -p static/js/draco && cp ../src/engine_base/draco/*.js ../src/engine_base/draco/*.wasm static/js/draco/ 2>/dev/null || true",
+    "copy-all": "npm run copy-sdk && npm run copy-draco"
   },
   "devDependencies": {
     "vite": "^7.2.6"

demo/static/js/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 };

demo/static/js/draco/draco_wasm_wrapper.js

@@ -0,0 +1,104 @@
+var $jscomp=$jscomp||{};$jscomp.scope={};$jscomp.arrayIteratorImpl=function(f){var m=0;return function(){return m<f.length?{done:!1,value:f[m++]}:{done:!0}}};$jscomp.arrayIterator=function(f){return{next:$jscomp.arrayIteratorImpl(f)}};$jscomp.makeIterator=function(f){var m="undefined"!=typeof Symbol&&Symbol.iterator&&f[Symbol.iterator];return m?m.call(f):$jscomp.arrayIterator(f)};
+$jscomp.getGlobal=function(f){return"undefined"!=typeof window&&window===f?f:"undefined"!=typeof global&&null!=global?global:f};$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());
+S(Ea)}}if(!(0<aa)){if(a.preRun)for("function"==typeof a.preRun&&(a.preRun=[a.preRun]);a.preRun.length;)Fa.unshift(a.preRun.shift());S(Fa);0<aa||(a.setStatus?(a.setStatus("Running..."),setTimeout(function(){setTimeout(function(){a.setStatus("")},1);c()},1)):c())}}function p(){}function u(a){return(a||p).__cache__}function N(a,c){var b=u(c),d=b[a];if(d)return d;d=Object.create((c||p).prototype);d.ptr=a;return b[a]=d}function V(a){if("string"===typeof a){for(var c=0,b=0;b<a.length;++b){var d=a.charCodeAt(b);
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+B.prototype=Object.create(p.prototype);B.prototype.constructor=B;B.prototype.__class__=B;B.__cache__={};a.PointCloud=B;B.prototype.num_attributes=B.prototype.num_attributes=function(){return qb(this.ptr)};B.prototype.num_points=B.prototype.num_points=function(){return rb(this.ptr)};B.prototype.__destroy__=B.prototype.__destroy__=function(){sb(this.ptr)};C.prototype=Object.create(p.prototype);C.prototype.constructor=C;C.prototype.__class__=C;C.__cache__={};a.DracoUInt8Array=C;C.prototype.GetValue=
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+typeof a&&(a=a.ptr);b=b&&"object"===typeof b?b.ptr:V(b);return Zb(c,a,b)};r.prototype.GetStringEntry=r.prototype.GetStringEntry=function(a,b){var c=this.ptr;n.prepare();a&&"object"===typeof a&&(a=a.ptr);b=b&&"object"===typeof b?b.ptr:V(b);return X($b(c,a,b))};r.prototype.NumEntries=r.prototype.NumEntries=function(a){var c=this.ptr;a&&"object"===typeof a&&(a=a.ptr);return ac(c,a)};r.prototype.GetEntryName=r.prototype.GetEntryName=function(a,b){var c=this.ptr;a&&"object"===typeof a&&(a=a.ptr);b&&"object"===
+typeof b&&(b=b.ptr);return X(bc(c,a,b))};r.prototype.__destroy__=r.prototype.__destroy__=function(){cc(this.ptr)};G.prototype=Object.create(p.prototype);G.prototype.constructor=G;G.prototype.__class__=G;G.__cache__={};a.DracoInt16Array=G;G.prototype.GetValue=G.prototype.GetValue=function(a){var c=this.ptr;a&&"object"===typeof a&&(a=a.ptr);return dc(c,a)};G.prototype.size=G.prototype.size=function(){return ec(this.ptr)};G.prototype.__destroy__=G.prototype.__destroy__=function(){fc(this.ptr)};H.prototype=
+Object.create(p.prototype);H.prototype.constructor=H;H.prototype.__class__=H;H.__cache__={};a.DracoFloat32Array=H;H.prototype.GetValue=H.prototype.GetValue=function(a){var c=this.ptr;a&&"object"===typeof a&&(a=a.ptr);return gc(c,a)};H.prototype.size=H.prototype.size=function(){return hc(this.ptr)};H.prototype.__destroy__=H.prototype.__destroy__=function(){ic(this.ptr)};O.prototype=Object.create(p.prototype);O.prototype.constructor=O;O.prototype.__class__=O;O.__cache__={};a.GeometryAttribute=O;O.prototype.__destroy__=
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+g;g.prototype.__class__=g;g.__cache__={};a.Decoder=g;g.prototype.GetEncodedGeometryType=g.prototype.GetEncodedGeometryType=function(a){var c=this.ptr;a&&"object"===typeof a&&(a=a.ptr);return mc(c,a)};g.prototype.DecodeBufferToPointCloud=g.prototype.DecodeBufferToPointCloud=function(a,b){var c=this.ptr;a&&"object"===typeof a&&(a=a.ptr);b&&"object"===typeof b&&(b=b.ptr);return N(nc(c,a,b),x)};g.prototype.DecodeBufferToMesh=g.prototype.DecodeBufferToMesh=function(a,b){var c=this.ptr;a&&"object"===typeof a&&
+(a=a.ptr);b&&"object"===typeof b&&(b=b.ptr);return N(oc(c,a,b),x)};g.prototype.GetAttributeId=g.prototype.GetAttributeId=function(a,b){var c=this.ptr;a&&"object"===typeof a&&(a=a.ptr);b&&"object"===typeof b&&(b=b.ptr);return pc(c,a,b)};g.prototype.GetAttributeIdByName=g.prototype.GetAttributeIdByName=function(a,b){var c=this.ptr;n.prepare();a&&"object"===typeof a&&(a=a.ptr);b=b&&"object"===typeof b?b.ptr:V(b);return qc(c,a,b)};g.prototype.GetAttributeIdByMetadataEntry=g.prototype.GetAttributeIdByMetadataEntry=
+function(a,b,d){var c=this.ptr;n.prepare();a&&"object"===typeof a&&(a=a.ptr);b=b&&"object"===typeof b?b.ptr:V(b);d=d&&"object"===typeof d?d.ptr:V(d);return rc(c,a,b,d)};g.prototype.GetAttribute=g.prototype.GetAttribute=function(a,b){var c=this.ptr;a&&"object"===typeof a&&(a=a.ptr);b&&"object"===typeof b&&(b=b.ptr);return N(sc(c,a,b),q)};g.prototype.GetAttributeByUniqueId=g.prototype.GetAttributeByUniqueId=function(a,b){var c=this.ptr;a&&"object"===typeof a&&(a=a.ptr);b&&"object"===typeof b&&(b=b.ptr);
+return N(tc(c,a,b),q)};g.prototype.GetMetadata=g.prototype.GetMetadata=function(a){var c=this.ptr;a&&"object"===typeof a&&(a=a.ptr);return N(uc(c,a),L)};g.prototype.GetAttributeMetadata=g.prototype.GetAttributeMetadata=function(a,b){var c=this.ptr;a&&"object"===typeof a&&(a=a.ptr);b&&"object"===typeof b&&(b=b.ptr);return N(vc(c,a,b),L)};g.prototype.GetFaceFromMesh=g.prototype.GetFaceFromMesh=function(a,b,d){var c=this.ptr;a&&"object"===typeof a&&(a=a.ptr);b&&"object"===typeof b&&(b=b.ptr);d&&"object"===
+typeof d&&(d=d.ptr);return!!wc(c,a,b,d)};g.prototype.GetTriangleStripsFromMesh=g.prototype.GetTriangleStripsFromMesh=function(a,b){var c=this.ptr;a&&"object"===typeof a&&(a=a.ptr);b&&"object"===typeof b&&(b=b.ptr);return xc(c,a,b)};g.prototype.GetTrianglesUInt16Array=g.prototype.GetTrianglesUInt16Array=function(a,b,d){var c=this.ptr;a&&"object"===typeof a&&(a=a.ptr);b&&"object"===typeof b&&(b=b.ptr);d&&"object"===typeof d&&(d=d.ptr);return!!yc(c,a,b,d)};g.prototype.GetTrianglesUInt32Array=g.prototype.GetTrianglesUInt32Array=
+function(a,b,d){var c=this.ptr;a&&"object"===typeof a&&(a=a.ptr);b&&"object"===typeof b&&(b=b.ptr);d&&"object"===typeof d&&(d=d.ptr);return!!zc(c,a,b,d)};g.prototype.GetAttributeFloat=g.prototype.GetAttributeFloat=function(a,b,d){var c=this.ptr;a&&"object"===typeof a&&(a=a.ptr);b&&"object"===typeof b&&(b=b.ptr);d&&"object"===typeof d&&(d=d.ptr);return!!Ac(c,a,b,d)};g.prototype.GetAttributeFloatForAllPoints=g.prototype.GetAttributeFloatForAllPoints=function(a,b,d){var c=this.ptr;a&&"object"===typeof a&&
+(a=a.ptr);b&&"object"===typeof b&&(b=b.ptr);d&&"object"===typeof d&&(d=d.ptr);return!!Bc(c,a,b,d)};g.prototype.GetAttributeIntForAllPoints=g.prototype.GetAttributeIntForAllPoints=function(a,b,d){var c=this.ptr;a&&"object"===typeof a&&(a=a.ptr);b&&"object"===typeof b&&(b=b.ptr);d&&"object"===typeof d&&(d=d.ptr);return!!Cc(c,a,b,d)};g.prototype.GetAttributeInt8ForAllPoints=g.prototype.GetAttributeInt8ForAllPoints=function(a,b,d){var c=this.ptr;a&&"object"===typeof a&&(a=a.ptr);b&&"object"===typeof b&&
+(b=b.ptr);d&&"object"===typeof d&&(d=d.ptr);return!!Dc(c,a,b,d)};g.prototype.GetAttributeUInt8ForAllPoints=g.prototype.GetAttributeUInt8ForAllPoints=function(a,b,d){var c=this.ptr;a&&"object"===typeof a&&(a=a.ptr);b&&"object"===typeof b&&(b=b.ptr);d&&"object"===typeof d&&(d=d.ptr);return!!Ec(c,a,b,d)};g.prototype.GetAttributeInt16ForAllPoints=g.prototype.GetAttributeInt16ForAllPoints=function(a,b,d){var c=this.ptr;a&&"object"===typeof a&&(a=a.ptr);b&&"object"===typeof b&&(b=b.ptr);d&&"object"===typeof d&&
+(d=d.ptr);return!!Fc(c,a,b,d)};g.prototype.GetAttributeUInt16ForAllPoints=g.prototype.GetAttributeUInt16ForAllPoints=function(a,b,d){var c=this.ptr;a&&"object"===typeof a&&(a=a.ptr);b&&"object"===typeof b&&(b=b.ptr);d&&"object"===typeof d&&(d=d.ptr);return!!Gc(c,a,b,d)};g.prototype.GetAttributeInt32ForAllPoints=g.prototype.GetAttributeInt32ForAllPoints=function(a,b,d){var c=this.ptr;a&&"object"===typeof a&&(a=a.ptr);b&&"object"===typeof b&&(b=b.ptr);d&&"object"===typeof d&&(d=d.ptr);return!!Hc(c,
+a,b,d)};g.prototype.GetAttributeUInt32ForAllPoints=g.prototype.GetAttributeUInt32ForAllPoints=function(a,b,d){var c=this.ptr;a&&"object"===typeof a&&(a=a.ptr);b&&"object"===typeof b&&(b=b.ptr);d&&"object"===typeof d&&(d=d.ptr);return!!Ic(c,a,b,d)};g.prototype.GetAttributeDataArrayForAllPoints=g.prototype.GetAttributeDataArrayForAllPoints=function(a,b,d,e,f){var c=this.ptr;a&&"object"===typeof a&&(a=a.ptr);b&&"object"===typeof b&&(b=b.ptr);d&&"object"===typeof d&&(d=d.ptr);e&&"object"===typeof e&&
+(e=e.ptr);f&&"object"===typeof f&&(f=f.ptr);return!!Jc(c,a,b,d,e,f)};g.prototype.SkipAttributeTransform=g.prototype.SkipAttributeTransform=function(a){var b=this.ptr;a&&"object"===typeof a&&(a=a.ptr);Kc(b,a)};g.prototype.__destroy__=g.prototype.__destroy__=function(){Lc(this.ptr)};y.prototype=Object.create(p.prototype);y.prototype.constructor=y;y.prototype.__class__=y;y.__cache__={};a.Mesh=y;y.prototype.num_faces=y.prototype.num_faces=function(){return Mc(this.ptr)};y.prototype.num_attributes=y.prototype.num_attributes=
+function(){return Nc(this.ptr)};y.prototype.num_points=y.prototype.num_points=function(){return Oc(this.ptr)};y.prototype.__destroy__=y.prototype.__destroy__=function(){Pc(this.ptr)};Q.prototype=Object.create(p.prototype);Q.prototype.constructor=Q;Q.prototype.__class__=Q;Q.__cache__={};a.VoidPtr=Q;Q.prototype.__destroy__=Q.prototype.__destroy__=function(){Qc(this.ptr)};I.prototype=Object.create(p.prototype);I.prototype.constructor=I;I.prototype.__class__=I;I.__cache__={};a.DracoInt32Array=I;I.prototype.GetValue=
+I.prototype.GetValue=function(a){var b=this.ptr;a&&"object"===typeof a&&(a=a.ptr);return Rc(b,a)};I.prototype.size=I.prototype.size=function(){return Sc(this.ptr)};I.prototype.__destroy__=I.prototype.__destroy__=function(){Tc(this.ptr)};L.prototype=Object.create(p.prototype);L.prototype.constructor=L;L.prototype.__class__=L;L.__cache__={};a.Metadata=L;L.prototype.__destroy__=L.prototype.__destroy__=function(){Uc(this.ptr)};(function(){function c(){a.OK=Vc();a.DRACO_ERROR=Wc();a.IO_ERROR=Xc();a.INVALID_PARAMETER=
+Yc();a.UNSUPPORTED_VERSION=Zc();a.UNKNOWN_VERSION=$c();a.DT_INVALID=ad();a.DT_INT8=bd();a.DT_UINT8=cd();a.DT_INT16=dd();a.DT_UINT16=ed();a.DT_INT32=fd();a.DT_UINT32=gd();a.DT_INT64=hd();a.DT_UINT64=id();a.DT_FLOAT32=jd();a.DT_FLOAT64=kd();a.DT_BOOL=ld();a.DT_TYPES_COUNT=md();a.INVALID_GEOMETRY_TYPE=nd();a.POINT_CLOUD=od();a.TRIANGULAR_MESH=pd();a.ATTRIBUTE_INVALID_TRANSFORM=qd();a.ATTRIBUTE_NO_TRANSFORM=rd();a.ATTRIBUTE_QUANTIZATION_TRANSFORM=sd();a.ATTRIBUTE_OCTAHEDRON_TRANSFORM=td();a.INVALID=ud();
+a.POSITION=vd();a.NORMAL=wd();a.COLOR=xd();a.TEX_COORD=yd();a.GENERIC=zd()}Ba?c():Da.unshift(c)})();if("function"===typeof a.onModuleParsed)a.onModuleParsed();return m}}();"object"===typeof exports&&"object"===typeof module?module.exports=DracoDecoderModule:"function"===typeof define&&define.amd?define([],function(){return DracoDecoderModule}):"object"===typeof exports&&(exports.DracoDecoderModule=DracoDecoderModule);

demo/viewer.html

@@ -0,0 +1,212 @@
+<!DOCTYPE html>
+<html lang="en">
+
+<head>
+    <meta charset="UTF-8">
+    <meta name="viewport" content="width=device-width, initial-scale=1.0">
+    <title>BIM Engine Viewer</title>
+    <!-- 从本地 lib 目录加载 SDK 文件 -->
+    <script src="./lib/bim-engine-sdk.umd.js"></script>
+    <style>
+        * {
+            box-sizing: border-box;
+            margin: 0;
+            padding: 0;
+        }
+
+        html,
+        body {
+            width: 100%;
+            height: 100%;
+            overflow: hidden;
+        }
+
+        body {
+            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
+            background-color: #1a1a1a;
+        }
+
+        #app {
+            width: 100%;
+            height: 100%;
+            background: #1a1a1a;
+            position: relative;
+        }
+
+        /* 错误提示 */
+        #error {
+            position: absolute;
+            top: 20px;
+            left: 50%;
+            transform: translateX(-50%);
+            background: rgba(220, 53, 69, 0.9);
+            color: #fff;
+            padding: 15px 30px;
+            border-radius: 6px;
+            font-size: 14px;
+            z-index: 1001;
+            display: none;
+            max-width: 80%;
+        }
+
+        #error.show {
+            display: block;
+        }
+    </style>
+</head>
+
+<body>
+    <!-- 主容器 -->
+    <div id="app"></div>
+
+    <!-- 错误提示 -->
+    <div id="error"></div>
+
+    <script>
+        let engine = null;
+        const errorEl = document.getElementById('error');
+
+        /**
+         * 显示错误提示
+         */
+        function showError(message) {
+            console.error('Error:', message);
+            if (errorEl) {
+                errorEl.textContent = message;
+                errorEl.classList.add('show');
+                // 5秒后自动隐藏
+                setTimeout(() => {
+                    errorEl.classList.remove('show');
+                }, 5000);
+            }
+        }
+
+        /**
+         * 初始化 3D 引擎
+         */
+        function initEngine3D() {
+            if (!engine || !engine.engine) {
+                throw new Error('引擎未创建');
+            }
+
+            if (engine.engine.isInitialized()) {
+                console.log('3D 引擎已经初始化过了');
+                return;
+            }
+
+            try {
+                // 初始化引擎，使用默认配置
+                const success = engine.engine.initialize({
+                    version: 'v2',              // WebGL 版本
+                    showStats: false,           // 不显示性能统计
+                    showViewCube: true          // 显示视图立方体
+                });
+
+                if (success) {
+                    console.log('✅ 3D 引擎初始化成功');
+                } else {
+                    throw new Error('3D 引擎初始化失败');
+                }
+            } catch (error) {
+                console.error('❌ 3D 引擎初始化错误:', error);
+                throw error;
+            }
+        }
+
+        /**
+         * 加载 3D 模型
+         */
+        function loadModel() {
+            if (!engine || !engine.engine) {
+                throw new Error('引擎未创建');
+            }
+
+            if (!engine.engine.isInitialized()) {
+                throw new Error('请先初始化 3D 引擎');
+            }
+
+            try {
+                // 加载模型文件（从 model 目录）- 使用与 index.html 相同的模型路径
+                const modelUrl = './model/test2';
+
+                engine.engine.loadModel(modelUrl, {
+                    position: [0, 0, 0],    // 初始位置
+                    rotation: [0, 0, 0],    // 初始旋转
+                    scale: [1, 1, 1]        // 初始缩放
+                });
+
+                console.log('✅ 模型加载请求已发送:', modelUrl);
+            } catch (error) {
+                console.error('❌ 模型加载错误:', error);
+                throw error;
+            }
+        }
+
+        /**
+         * 初始化引擎和加载模型
+         */
+        async function initializeViewer() {
+            try {
+                // 检查 SDK 是否加载
+                if (!window.LyzBimEngineSDK) {
+                    throw new Error('SDK not loaded');
+                }
+
+                // 创建引擎实例
+                const Engine = window.LyzBimEngineSDK.BimEngine;
+                engine = new Engine('app', {
+                    locale: 'zh-CN'
+                });
+
+                console.log('✅ Engine instance created:', engine);
+
+                // 初始化 3D 引擎
+                initEngine3D();
+
+                // 等待引擎完全初始化
+                await new Promise(resolve => setTimeout(resolve, 500));
+
+                // 加载模型
+                loadModel();
+
+                console.log('✅ Viewer initialized successfully');
+
+            } catch (error) {
+                showError('Failed to initialize: ' + error.message);
+            }
+        }
+
+        // 页面加载完成后自动初始化
+        window.onload = () => {
+            console.log('Page loaded, initializing viewer...');
+            initializeViewer();
+        };
+
+        // 窗口大小改变时调整引擎尺寸
+        window.addEventListener('resize', () => {
+            if (engine && engine.engine && engine.engine.isInitialized()) {
+                const rendererModule = engine.engine.getEngine()?.rendererModule;
+                if (rendererModule && rendererModule.renderer) {
+                    const container = document.getElementById('app');
+                    rendererModule.renderer.setSize(
+                        container.clientWidth,
+                        container.clientHeight
+                    );
+                }
+            }
+        });
+
+        // 错误处理
+        window.addEventListener('error', (event) => {
+            console.error('Global error:', event.error);
+            showError('An error occurred: ' + event.error.message);
+        });
+
+        window.addEventListener('unhandledrejection', (event) => {
+            console.error('Unhandled promise rejection:', event.reason);
+            showError('An error occurred: ' + event.reason);
+        });
+    </script>
+</body>
+
+</html>