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84 lines
2.2 KiB
84 lines
2.2 KiB
3 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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[page:Object3D] →
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<h1>[name]</h1>
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<p class="desc">
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用于模拟场景中平行光 [page:DirectionalLight] 的辅助对象.
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其中包含了表示光位置的平面和表示光方向的线段.
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</p>
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<h2>代码示例</h2>
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<code>
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const light = new THREE.DirectionalLight( 0xFFFFFF );
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const helper = new THREE.DirectionalLightHelper( light, 5 );
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scene.add( helper );
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</code>
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<h2>构造函数</h2>
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<h3>[name]( [param:DirectionalLight light], [param:Number size], [param:Hex color] )</h3>
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<p>
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[page:DirectionalLight light]-- 被模拟的光源. <br /><br />
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[page:Number size] -- (可选的) 平面的尺寸. 默认为 *1*.<br /><br />
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[page:Hex color] -- (可选的) 如果没有设置颜色将使用光源的颜色.
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</p>
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<h2>属性</h2>
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<p>请到基类 [page:Object3D] 页面查看公共属性.</p>
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<h3>[property:Line lightPlane]</h3>
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<p>包含表示平行光方向的线网格.</p>
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<h3>[property:DirectionalLight light]</h3>
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<p>被模拟的光源. 请参考 [page:DirectionalLight directionalLight] .</p>
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<h3>[property:Object matrix]</h3>
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<p>请参考光源的世界矩阵 [page:Object3D.matrixWorld matrixWorld].</p>
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<h3>[property:Object matrixAutoUpdate]</h3>
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<p>
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请查看 [page:Object3D.matrixAutoUpdate] 页面. 这里设置为 *false* 表示辅助对象
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使用光源的 [page:Object3D.matrixWorld matrixWorld].
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</p>
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<h3>[property:hex color]</h3>
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<p>
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构造函数中传入的颜色值. 默认为 *undefined*. 如果改变该值,
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辅助对象的颜色将在下一次 [page:.update update] 被调用时更新.
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</p>
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<h2>方法</h2>
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<p>请到基类 [page:Object3D] 页面查看公共方法.</p>
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<h3>[method:undefined dispose]()</h3>
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<p>销毁该平行光辅助对象.</p>
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<h3>[method:undefined update]()</h3>
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<p>更新辅助对象，与模拟的 [page:.light directionalLight] 光源的位置和方向保持一致.</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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