96 lines
2.6 KiB
HTML
96 lines
2.6 KiB
HTML
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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] → [page:Light] →
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<h1>半球光（[name]）</h1>
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<p class="desc">
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光源直接放置于场景之上，光照颜色从天空光线颜色渐变到地面光线颜色。
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<br /><br />
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半球光不能投射阴影。
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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.HemisphereLight( 0xffffbb, 0x080820, 1 );
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scene.add( light );
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</code>
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<h2>例子</h2>
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<p>
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[example:webgl_lights_hemisphere lights / hemisphere ]<br />
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[example:misc_controls_pointerlock controls / pointerlock ]<br />
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[example:webgl_decals decals ]<br />
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[example:webgl_loader_collada_kinematics loader / collada / kinematics ]<br />
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[example:webgl_materials_lightmap materials / lightmap ]<br />
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[example:webgl_shaders_ocean shaders / ocean ]
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</p>
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<h2>构造器（Constructor）</h2>
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<h3>[name]( [param:Integer skyColor], [param:Integer groundColor], [param:Float intensity] )</h3>
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<p>
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[page:Integer skyColor] - (可选参数) 天空中发出光线的颜色。 缺省值 0xffffff。<br />
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[page:Integer groundColor] - (可选参数) 地面发出光线的颜色。 缺省值 0xffffff。<br />
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[page:Float intensity] - (可选参数) 光照强度。 缺省值 1。<br /><br />
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创建一个半球光。
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</p>
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<h2>属性（Properties）</h2>
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<p>
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公共属性请查看基类[page:Light Light]。
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</p>
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<h3>[property:Boolean castShadow]</h3>
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<p>
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该参数在构造时被设置为 *undefined* 因为半球光不能投射阴影。
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</p>
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<h3>[property:Float color]</h3>
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<p>
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在构造时传递的天空发出光线的颜色。
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默认会创建 [page:Color] 并设置为白色（0xffffff）。
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</p>
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<h3>[property:Float groundColor]</h3>
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<p>
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在构造时传递的地面发出光线的颜色。
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默认会创建 [page:Color] 并设置为白色（0xffffff）。
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</p>
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<h3>[property:Vector3 position]</h3>
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<p>
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假如这个值设置等于 [page:Object3D.DefaultUp] (0, 1, 0),那么光线将会从上往下照射。
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</p>
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<h2>方法（Methods）</h2>
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<p>公共方法请查看基类 [page:Light Light]。</p>
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<h3>[method:HemisphereLight copy]( [param:HemisphereLight source] )</h3>
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<p>
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从[page:Light source]复制 [page:.color color], [page:.intensity intensity] 和
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[page:.groundColor groundColor] 的值到当前半球光对象中。
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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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