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75 lines
2.3 KiB
75 lines
2.3 KiB
2 years ago
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<!DOCTYPE html>
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<html lang="en">
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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:Object3D] → [page:Light] →
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<h1>光照探针[name]</h1>
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<p class="desc">
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光照探针是一种在3D场景中添加光源的另一种方法。与经典光源（平行光、点光、聚光）不同，
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光照探针不发光。相反，光照探针存储着有关穿过3D空间的光线的信息。
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渲染过程中，通过使用来自光照探针的数据，来逼近打到3D物体上的光线。
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</p>
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<p class="desc">
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光照探针通常从（辐射）环境贴图中创建。 [page:LightProbeGenerator] 类可以根据 [page:CubeTexture] 或
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[page:WebGLCubeRenderTarget] 的实例来创建光照探针。
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但是，光照估算数据同样可以以其他形式提供，例如，通过WebXR。
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这将能够渲染可对真实世界的光照做出反应的增强现实内容。
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</p>
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<p class="desc">
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three.js中，当前的探针实现支持所谓的漫反射光照探针。
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这种类型的光照探针功能上等效于辐照环境贴图。
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</p>
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<h2>例子</h2>
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<p>
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[example:webgl_lightprobe WebGL / light probe ]<br />
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[example:webgl_lightprobe_cubecamera WebGL / light probe / cube camera ]
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</p>
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<h2>构造函数</h2>
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<h3>[name]( [param:SphericalHarmonics3 sh], [param:Float intensity] )</h3>
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<p>
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[page:SphericalHarmonics3 sh] - （可选）一个[page:SphericalHarmonics3]的实例。<br />
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[page:Float intensity] - （可选）光照探针强度的数值。默认值为1。<br /><br />
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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>
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See the base [page:Light Light] class for common properties.
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[page:Light.color color] 属性当前未做评估，因此不生效。
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</p>
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<h3>[property:Boolean isLightProbe]</h3>
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<p>
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Read-only flag to check if a given object is of type [name].
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</p>
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<h3>[property:SphericalHarmonics3 sh]</h3>
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<p>
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光照探针使用球面谐波（spherical harmonic）来编码光照信息。
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</p>
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<h2>方法</h2>
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<p>
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See the base [page:Light Light] class for common methods.
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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/src/[path].js src/[path].js]
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</p>
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</body>
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</html>
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