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143 lines
4.4 KiB
143 lines
4.4 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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<h1>[name]</h1>
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<p class="desc">Represents a third-order spherical harmonics (SH). Light probes use this class to encode lighting information.</p>
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<h2>Constructor</h2>
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<h3>[name]()</h3>
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<p>
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Creates a new instance of [name].
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</p>
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<h2>Properties</h2>
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<h3>[property:Array coefficients]</h3>
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<p>An array holding the (9) SH coefficients. A single coefficient is represented as an instance of [page:Vector3].</p>
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<h3>[property:Boolean isSphericalHarmonics3]</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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<h2>Methods</h2>
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<h3>[method:SphericalHarmonics3 add]( [param:SphericalHarmonics3 sh] )</h3>
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<p>
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[page:SphericalHarmonics3 sh] - The SH to add.<br /><br />
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Adds the given SH to this instance.
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</p>
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<h3>[method:SphericalHarmonics3 addScaledSH]( [param:SphericalHarmonics3 sh], [param:Number scale] )</h3>
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<p>
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[page:SphericalHarmonics3 sh] - The SH to add.<br />
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[page:Number scale] - The scale factor.<br /><br />
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A convenience method for performing [page:.add]() and [page:.scale]() at once.
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</p>
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<h3>[method:SphericalHarmonics3 clone]()</h3>
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<p>
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Returns a new instance of [name] with equal coefficients.
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</p>
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<h3>[method:SphericalHarmonics3 copy]( [param:SphericalHarmonics3 sh] )</h3>
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<p>
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[page:SphericalHarmonics3 sh] - The SH to copy.<br /><br />
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Copies the given SH to this instance.
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</p>
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<h3>[method:Boolean equals]( [param:SphericalHarmonics3 sh] )</h3>
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<p>
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[page:SphericalHarmonics3 sh] - The SH to compare with.<br /><br />
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Returns true if the given SH and this instance have equal coefficients.
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</p>
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<h3>[method:SphericalHarmonics3 fromArray]( [param:Array array], [param:Number offset] )</h3>
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<p>
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[page:Array array] - The array holding the numbers of the SH coefficients.<br />
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[page:Number offset] - (optional) The array offset.<br /><br />
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Sets the coefficients of this instance from the given array.
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</p>
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<h3>[method:Vector3 getAt]( [param:Vector3 normal], [param:Vector3 target] )</h3>
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<p>
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[page:Vector3 normal] - The normal vector (assumed to be unit length).<br />
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[page:Vector3 target] - The result vector.<br /><br />
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Returns the radiance in the direction of the given normal.
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</p>
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<h3>[method:Vector3 getIrradianceAt]( [param:Vector3 normal], [param:Vector3 target] )</h3>
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<p>
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[page:Vector3 normal] - The normal vector (assumed to be unit length).<br />
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[page:Vector3 target] - The result vector.<br /><br />
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Returns the irradiance (radiance convolved with cosine lobe) in the direction of the given normal.
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</p>
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<h3>[method:SphericalHarmonics3 lerp]( [param:SphericalHarmonics3 sh], [param:Number alpha] )</h3>
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<p>
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[page:SphericalHarmonics3 sh] - The SH to interpolate with.<br />
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[page:Number alpha] - The alpha factor.<br /><br />
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Linear interpolates between the given SH and this instance by the given alpha factor.
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</p>
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<h3>[method:SphericalHarmonics3 scale]( [param:Number scale] )</h3>
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<p>
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[page:Number sh] - The scale factor.<br /><br />
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Scales this SH by the given scale factor.
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</p>
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<h3>[method:SphericalHarmonics3 set]( [param:Array coefficients] )</h3>
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<p>
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[page:Array coefficients] - An array of SH coefficients.<br /><br />
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Sets the given SH coefficients to this instance.
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</p>
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<h3>[method:Array toArray]( [param:Array array], [param:Number offset] )</h3>
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<p>
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[page:Array array] - (optional) The target array.<br />
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[page:Number offset] - (optional) The array offset.<br /><br />
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Returns an array with the coefficients, or copies them into the provided array. The coefficients
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are represented as numbers.
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</p>
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<h3>[method:SphericalHarmonics3 zero]()</h3>
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<p>
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Sets all SH coefficients to 0.
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</p>
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<h2>Static Methods</h2>
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<h3>[method:undefined getBasisAt]( [param:Vector3 normal], [param:Array shBasis] )</h3>
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<p>
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[page:Vector3 normal] - The normal vector (assumed to be unit length).<br />
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[page:Array shBasis] - The resulting SH basis.<br /><br />
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Computes the SH basis for the given normal vector.
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</p>
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<h2>Source</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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