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<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="utf-8" />
<base href="../../../../" />
<script src="list.js"></script>
<script src="page.js"></script>
<link type="text/css" rel="stylesheet" href="page.css" />
</head>
<body>
[page:Curve] →
<h1>[name]</h1>
<p class="desc">
使用[link:https://en.wikipedia.org/wiki/Centripetal_Catmull-Rom_spline Catmull-Rom]算法，
从一系列的点创建一条平滑的三维样条曲线。</p>
<h2>示例</h2>
<code>
//Create a closed wavey loop
var curve = new THREE.CatmullRomCurve3( [
new THREE.Vector3( -10, 0, 10 ),
new THREE.Vector3( -5, 5, 5 ),
new THREE.Vector3( 0, 0, 0 ),
new THREE.Vector3( 5, -5, 5 ),
new THREE.Vector3( 10, 0, 10 )
] );
var points = curve.getPoints( 50 );
var geometry = new THREE.BufferGeometry().setFromPoints( points );
var material = new THREE.LineBasicMaterial( { color : 0xff0000 } );
// Create the final object to add to the scene
var curveObject = new THREE.Line( geometry, material );
</code>
<h3>[example:webgl_geometry_extrude_splines geometry / extrude / splines]</h3>
<h2>构造函数</h2>
<h3>[name]( [param:Array points], [param:Boolean closed], [param:String curveType], [param:Float tension] )</h3>
<p>
points – [page:Vector3]点数组<br/>
closed – 该曲线是否闭合，默认值为false。<br/>
curveType – 曲线的类型，默认值为*centripetal*。<br/>
tension – 曲线的张力，默认为*0.5*。
</p>
<h2>属性</h2>
<p>共有属性请参见其基类[page:Curve]。</p>
<h3>[property:Boolean isCatmullRomCurve3]</h3>
<p>
用于检查该类或者其派生类是否为CatmullRomCurve3。默认值为*true*。<br /><br />
你不应当对这一属性进行改变，它在内部使用，以用于优化。
</p>
<h3>[property:Array points]</h3>
<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>
<h3>[property:Boolean closed]</h3>
<p>当该值为true时，曲线将会闭合（环回自身）。</p>
<h3>[property:String curveType]</h3>
<p>可能的值为*centripetal*、*chordal*和*catmullrom*。</p>
<h3>[property:float tension]</h3>
<p>当[page:.type]为*catmullrom*时，定义catmullrom的张力。</p>
<h2>方法</h2>
<p>共有方法请参见其基类[page:Curve]。</p>
<p>
[link:https://github.com/mrdoob/three.js/blob/master/src/[path].js src/[path].js]
</p>
</body>
</html>
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