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113 lines
3.3 KiB
113 lines
3.3 KiB
2 years ago
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<!DOCTYPE html>
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<html lang="zh">
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<head>
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<meta charset="utf-8" />
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<base href="../../../" />
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<script src="page.js"></script>
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<link type="text/css" rel="stylesheet" href="page.css" />
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</head>
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<body>
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[page:Loader] →
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<h1>[name]</h1>
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<p class="desc">
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A loader for the PCD (Point Cloud Data) file format. [name] supports ASCII and (compressed) binary files as well as the following PCD fields:
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<ul>
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<li>x y z</li>
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<li>rgb</li>
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<li>normal_x normal_y normal_z</li>
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<li>intensity</li>
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<li>label</li>
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</ul>
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</p>
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<h2>代码示例</h2>
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<code>
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// instantiate a loader
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const loader = new PCDLoader();
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// load a resource
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loader.load(
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// resource URL
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'pointcloud.pcd',
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// called when the resource is loaded
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function ( points ) {
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scene.add( points );
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},
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// called when loading is in progresses
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function ( xhr ) {
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console.log( ( xhr.loaded / xhr.total * 100 ) + '% loaded' );
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},
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// called when loading has errors
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function ( error ) {
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console.log( 'An error happened' );
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}
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);
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</code>
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<h2>例子</h2>
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<p>
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[example:webgl_loader_pcd]
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</p>
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<h2>构造器</h2>
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<h3>[name]( [param:LoadingManager manager] )</h3>
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<p>
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[page:LoadingManager manager] — 加载器使用的 [page:LoadingManager loadingManager] (加载管理器)，默认值是 [page:LoadingManager THREE.DefaultLoadingManager]。
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</p>
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<p>
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创建一个新的 [name]。
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</p>
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<h2>属性</h2>
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<p>共有属性请参见其基类 [page:Loader]。</p>
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<h3>[page:Boolean littleEndian]</h3>
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<p>
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在加载器内部调用 DataView.prototype.getFloat32() 时，表示这个32位浮点数是否以 小字节序(little-endian) 格式存储，默认值为 true。
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</p>
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<h2>方法</h2>
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<p>共有方法请参考其基类 [page:Loader]。</p>
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<h3>[method:undefined load]( [param:String url], [param:Function onLoad], [param:Function onProgress], [param:Function onError] )</h3>
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<p>
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[page:String url] — 一个包含有 <em>.pcd</em> 文件的路径或URL的字符串。<br />
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[page:Function onLoad] — (可选参数) 当加载过程成功完成后将被调用的函数。 其参数是一个 [page:Object3D] 实例。<br />
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[page:Function onProgress] — (可选参数) 加载正在进行过程中会被调用的函数。 其参数是一个 XMLHttpRequest 实例，包含有总字节数 [page:Integer total] 和已加载的字节数 [page:Integer loaded]。<br />
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[page:Function onError] — (可选参数) 若在加载过程中发生错误，将被调用的函数。 其参数是一个 error 实例。<br />
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</p>
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<p>
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开始从路径或url加载，并使用解析过的响应内容调用回调函数。
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</p>
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<h3>[method:Object3D parse]( [param:Arraybuffer data],[param:String url] )</h3>
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<p>
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[page:Arraybuffer data] — 要分析的二进制数据结构
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</p>
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<p>
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[page:String url] — 文件名或文件url。
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</p>
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<p>
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分析 <em>pcd</em> 二进制结构并返回一个 [page:Object3D] 实例。<br />
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该 Object3D 实例实际类型为 [page:Points]，由一个 [page:BufferGeometry] 实例和一个 [page:PointsMaterial] 实例作为参数构造而成。
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</p>
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<h2>源码</h2>
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<p>
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[link:https://github.com/mrdoob/three.js/blob/master/examples/jsm/loaders/PCDLoader.js examples/jsm/loaders/PCDLoader.js]
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</p>
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</body>
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</html>
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