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68 lines
2.4 KiB
68 lines
2.4 KiB
<!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>场景工具（[name]）</h1>
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<p class="desc">一个用于操控场景的实用类。</p>
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<h2>方法</h2>
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<h3>[method:Group createMeshesFromInstancedMesh]( [param:InstancedMesh instancedMesh] )</h3>
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<p>
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instancedMesh -- 实例化网格。
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</p>
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<p>
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为给定的实例化网格的每个实例，创建一个包含新网格的新物体组（Object Group）。
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</p>
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<h3>[method:Group createMeshesFromMultiMaterialMesh]( [param:Mesh mesh] )</h3>
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<p>
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mesh -- A mesh with multiple materials.
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</p>
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<p>
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Converts the given multi-material mesh into an instance of [page:Group] holding for each material a separate mesh.
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</p>
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<h3>[method:Group createMultiMaterialObject]( [param:BufferGeometry geometry], [param:Array materials] )</h3>
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<p>
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geometry -- 材料集的几何形状。 <br />
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materials -- 为物体准备的材料。
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</p>
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<p>
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创建一个新组，囊括了在材质中定义的每种材质的新网格。请注意，这和为一个网格定义多种材质的材质数组不同。<br />
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该方法对于同时需要材质和线框绘制的物体非常有用。
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</p>
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<h3>[method:undefined sortInstancedMesh]( [param:InstancedMesh mesh], [param:Function compareFn] )</h3>
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<p>
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mesh -- InstancedMesh in which instances will be sorted. <br />
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compareFn -- Comparator function defining the sort order.
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</p>
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<p>
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Sorts the instances within an [page:InstancedMesh], according to a user-defined
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callback. The callback will be provided with two arguments, <i>indexA</i>
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and <i>indexB</i>, and must return a numerical value. See
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[link:https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Array/sort#description Array.prototype.sort]
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for more information on sorting callbacks and their return values.
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</p>
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<p>
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Because of the high performance cost, three.js does not sort
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[page:InstancedMesh] instances automatically. Manually sorting may be
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helpful to improve display of alpha blended materials (back to front),
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and to reduce overdraw in opaque materials (front to back).
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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/utils/SceneUtils.js examples/jsm/utils/SceneUtils.js]
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</p>
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</body>
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</html>
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