99 lines
3.9 KiB
HTML
99 lines
3.9 KiB
HTML
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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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<h1>[name]</h1>
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<p class="desc">
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A class containing utility functions for [page:BufferGeometry BufferGeometry] instances.
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</p>
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<h2>Methods</h2>
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<h3>[method:BufferGeometry mergeBufferGeometries]( [param:Array geometries], [param:Boolean useGroups] )</h3>
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<p>
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geometries -- Array of [page:BufferGeometry BufferGeometry] instances.<br />
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useGroups -- Whether groups should be generated for the merged geometry or not.<br /><br />
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Merges a set of geometries into a single instance. All geometries must have compatible attributes.
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If merge does not succeed, the method returns null.
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</p>
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<h3>[method:BufferAttribute mergeBufferAttributes]( [param:Array attributes] )</h3>
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<p>
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attributes -- Array of [page:BufferAttribute BufferAttribute] instances.<br /><br />
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Merges a set of attributes into a single instance. All attributes must have compatible properties
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and types, and [page:InterleavedBufferAttribute InterleavedBufferAttributes] are not supported. If merge does not succeed, the method
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returns null.
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</p>
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<h3>[method:InterleavedBufferAttribute interleaveAttributes]( [param:Array attributes] )</h3>
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<p>
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attributes -- Array of [page:BufferAttribute BufferAttribute] instances.<br /><br />
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Interleaves a set of attributes and returns a new array of corresponding attributes that share
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a single InterleavedBuffer instance. All attributes must have compatible types. If merge does not
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succeed, the method returns null.
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</p>
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<h3>[method:Number estimateBytesUsed]( [param:BufferGeometry geometry] )</h3>
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<p>
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geometry -- Instance of [page:BufferGeometry BufferGeometry] to estimate the memory use of.<br /><br />
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Returns the amount of bytes used by all attributes to represent the geometry.
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</p>
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<h3>[method:BufferGeometry mergeVertices]( [param:BufferGeometry geometry], [param:Number tolerance] )</h3>
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<p>
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geometry -- Instance of [page:BufferGeometry BufferGeometry] to merge the vertices of.<br />
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tolerance -- The maximum allowable difference between vertex attributes to merge. Defaults to 1e-4.<br /><br />
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Returns a new [page:BufferGeometry BufferGeometry] with vertices for which all similar vertex attributes
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(within tolerance) are merged.
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</p>
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<h3>[method:BufferGeometry toTrianglesDrawMode]( [param:BufferGeometry geometry], [param:TrianglesDrawMode drawMode] )</h3>
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<p>
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geometry -- Instance of [page:BufferGeometry BufferGeometry].<br />
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drawMode -- The draw mode of the given geometry.<br /><br />
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Returns a new indexed [page:BufferGeometry BufferGeometry] based on the [page:DrawModes THREE.TrianglesDrawMode] draw mode. This mode
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corresponds to the *gl.TRIANGLES* WebGL primitive.
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</p>
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<h3>[method:Object computeMorphedAttributes]( [param:Mesh | Line | Points object] )</h3>
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<p>
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object -- Instance of [page:Mesh Mesh] | [page:Line Line] | [page:Points Points].<br /><br />
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Returns the current attributes (Position and Normal) of a morphed/skinned [page:Object3D Object3D] whose geometry is a
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[page:BufferGeometry BufferGeometry], together with the original ones: An Object with 4 properties:
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`positionAttribute`, `normalAttribute`, `morphedPositionAttribute` and `morphedNormalAttribute`.
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Helpful for Raytracing or Decals (i.e. a [page:DecalGeometry DecalGeometry] applied to a morphed Object
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with a [page:BufferGeometry BufferGeometry] will use the original BufferGeometry, not the morphed/skinned one,
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generating an incorrect result.
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Using this function to create a shadow Object3D the DecalGeometry can be correctly generated).
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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/examples/jsm/utils/BufferGeometryUtils.js examples/jsm/utils/BufferGeometryUtils.js]
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</p>
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</body>
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</html>
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