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81 lines
2.2 KiB
81 lines
2.2 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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[page:Curve] →
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<h1>[name]</h1>
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<p class="desc">
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使用[link:https://en.wikipedia.org/wiki/Centripetal_Catmull-Rom_spline Catmull-Rom]算法，
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从一系列的点创建一条平滑的三维样条曲线。</p>
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<h2>代码示例</h2>
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<code>
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//Create a closed wavey loop
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const curve = new THREE.CatmullRomCurve3( [
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new THREE.Vector3( -10, 0, 10 ),
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new THREE.Vector3( -5, 5, 5 ),
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new THREE.Vector3( 0, 0, 0 ),
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new THREE.Vector3( 5, -5, 5 ),
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new THREE.Vector3( 10, 0, 10 )
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] );
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const points = curve.getPoints( 50 );
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const geometry = new THREE.BufferGeometry().setFromPoints( points );
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const material = new THREE.LineBasicMaterial( { color: 0xff0000 } );
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// Create the final object to add to the scene
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const curveObject = new THREE.Line( geometry, material );
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</code>
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<h2>例子</h2>
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<p>
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[example:webgl_geometry_extrude_splines WebGL / geometry / extrude / splines]
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</p>
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<h2>构造函数</h2>
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<h3>[name]( [param:Array points], [param:Boolean closed], [param:String curveType], [param:Float tension] )</h3>
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<p>
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points – [page:Vector3]点数组<br/>
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closed – 该曲线是否闭合，默认值为false。<br/>
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curveType – 曲线的类型，默认值为*centripetal*。<br/>
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tension – 曲线的张力，默认为*0.5*。
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</p>
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<h2>属性</h2>
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<p>共有属性请参见其基类[page:Curve]。</p>
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<h3>[property:Array points]</h3>
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<p>定义了这一曲线的[page:Vector3]点数组，数组中至少需要两个点。</p>
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<h3>[property:Boolean closed]</h3>
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<p>当该值为true时，曲线将会闭合（环回自身）。</p>
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<h3>[property:String curveType]</h3>
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<p>可能的值为*centripetal*、*chordal*和*catmullrom*。</p>
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<h3>[property:Float tension]</h3>
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<p>当[page:.curveType]为*catmullrom*时，定义catmullrom的张力。</p>
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<h2>方法</h2>
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<p>共有方法请参见其基类[page:Curve]。</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/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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