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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:Group] →
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<h1>XR估计光照([name])</h1>
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<p class="desc">
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[name] 使用 WebXR 的光照估计来创建光探针、定向光和（可选）模拟用户真实世界环境和照明的环境图。<br>
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当 WebXR 更新光照和环境估计时，[name] 会自动更新光照探针、定向光和环境贴图。<br><br>
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在创建 WebXR 会话时，将光照估计指定为可选或必需的功能非常重要，否则光照估计将无法工作。<br><br>
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有关浏览器兼容性信息，请参阅 <a
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href="https://developer.mozilla.org/en-US/docs/Web/API/XRLightProbe#browser_compatibility">此处</a>，因为这仍然是 WebXR
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中的一个实验功能。<br><br>
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要使用它，就像 /examples 目录中的所有文件一样，您必须在HTML中单独包含该文件。
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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 { XREstimatedLight } from 'three/addons/webxr/XREstimatedLight.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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renderer.xr.enabled = true;
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// Don't add the XREstimatedLight to the scene initially.
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// It doesn't have any estimated lighting values until an AR session starts.
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const xrLight = new XREstimatedLight( renderer );
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xrLight.addEventListener( 'estimationstart' , () => {
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scene.add( xrLight );
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if ( xrLight.environment ) {
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scene.environment = xrLight.environment;
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}
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} );
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xrLight.addEventListener( 'estimationend', () => {
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scene.remove( xrLight );
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scene.environment = null;
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} );
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// In order for lighting estimation to work, 'light-estimation' must be included as either
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// an optional or required feature.
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document.body.appendChild( XRButton.createButton( renderer, {
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optionalFeatures: [ 'light-estimation' ]
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} ) );
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</code>
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<h2>例子</h2>
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<p>[example:webxr_ar_lighting webxr / light estimation]</p>
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<h2>构造函数</h2>
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<h3>[name]( [param:WebGLRenderer renderer], [param:Boolean environmentEstimation] )</h3>
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<p>
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[page:WebGLRenderer renderer]: （必需）用于渲染场景的渲染器。主要用于与 WebXRManager 交互。<br><br>
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environmentEstimation: 如果 `true`，则使用 WebXR 来估计环境地图。
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</p>
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<h2>事件</h2>
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<h3>estimationstart</h3>
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<p>
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当估计的照明值开始更新时触发。
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</p>
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<h3>estimationend</h3>
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<p>
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当估计的照明值停止更新时触发。
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</p>
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<h2>Properties</h2>
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<h3>[property:Texture environment]</h3>
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<p>
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WebXR 估计的环境地图。仅当 environmentEstimation 为 时，此选项才可用 `true`。<br><br>
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它可以用作 [page:Scene.environment] 的 [page:MeshStandardMaterial.envMap] 或 [page:Scene.background]。
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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/webxr/XREstimatedLight.js examples/jsm/webxr/XREstimatedLight.js]
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</p>
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</body>
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</html>
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