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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>PDB加载器([name])</h1>
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<p class="desc">用于加载 `.pdb` 资源的加载器。<br>
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[link:http://en.wikipedia.org/wiki/Protein_Data_Bank_(file_format) 蛋白质数据库] 文件格式是描述分子三维结构的文本文件。
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</p>
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<h2>导入</h2>
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<p>
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[name] 是一个附加组件，必须显式导入。请参阅 [link:#manual/introduction/Installation Installation / Addons]。
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</p>
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<code>
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import { PDBLoader } from 'three/addons/loaders/PDBLoader.js';
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</code>
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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 PDBLoader();
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// load a PDB resource
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loader.load(
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// resource URL
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'models/pdb/caffeine.pdb',
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// called when the resource is loaded
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function ( pdb ) {
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const geometryAtoms = pdb.geometryAtoms;
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const geometryBonds = pdb.geometryBonds;
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const json = pdb.json;
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console.log( 'This molecule has ' + json.atoms.length + ' atoms' );
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},
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// called when loading is in progress
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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_pdb]
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</p>
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<h2>构造函数</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] 。默认值为 [page:LoadingManager
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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>有关公共属性，请参阅 [page:Loader] 基类。</p>
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<h2>Methods</h2>
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<p>有关常用方法，请参阅 [page:Loader] 基类。</p>
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<h3>[method:undefined load]( [param:String url], [param:Function onLoad], [param:Function onProgress], [param:Function
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onError] )</h3>
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<p>
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[page:String url] — 包含 `.pdb` 文件路径/URL 的字符串。<br />
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[page:Function onLoad] — （可选）加载成功完成后调用的函数。该函数接收具有以下属性的对象。[page:BufferGeometry geometryAtoms]、[page:BufferGeometry
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geometryBonds] 和 [page:Object JSON] 结构。<br />
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[page:Function onProgress] — （可选）加载过程中调用的函数。参数将是 XMLHttpRequest 实例，其中包含 .[page:Integer total] 和 .[page:Integer
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loaded] 字节。如果服务器没有设置 Content-Length，.[page:Integer total] 将为 0。<br />
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[page:Function onError] —（可选）加载期间发生错误时调用的函数。该函数接收错误作为参数。<br />
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</p>
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<p>
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开始从 url 加载并使用解析后的响应内容调用 onLoad。
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</p>
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<h3>[method:Object parse]( [param:String text] )</h3>
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<p>
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[page:String text] — 要解析的文本 `pdb` 结构。
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</p>
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<p>
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解析 `pdb` 文本并返回JSON结构。<br />
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</p>
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<h2>源代码</h2>
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<p>
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[link:https://github.com/mrdoob/three.js/blob/master/examples/jsm/loaders/PDBLoader.js examples/jsm/loaders/PDBLoader.js]
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</p>
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</body>
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</html>
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