[page:Curve] →

# [name]

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。

## 代码示例

`//Create a closed wavey loop const 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 ) ] ); const points = curve.getPoints( 50 ); const geometry = new THREE.BufferGeometry().setFromPoints( points ); const material = new THREE.LineBasicMaterial( { color: 0xff0000 } ); // Create the final object to add to the scene const curveObject = new THREE.Line( geometry, material );`

## 例子

[example:webgl_geometry_extrude_splines WebGL / geometry / extrude / splines]

## 构造函数

### [name]( [param:Array points], [param:Boolean closed], [param:String curveType], [param:Float tension] )

points – [page:Vector3]点数组
closed – 该曲线是否闭合，默认值为false。
curveType – 曲线的类型，默认值为*centripetal*。
tension – 曲线的张力，默认为*0.5*。

## 属性

共有属性请参见其基类[page:Curve]。

### [property:Array points]

定义了这一曲线的[page:Vector3]点数组，数组中至少需要两个点。

### [property:Boolean closed]

当该值为true时，曲线将会闭合（环回自身）。

### [property:String curveType]

可能的值为*centripetal*、*chordal*和*catmullrom*。

### [property:Float tension]

当[page:.curveType]为*catmullrom*时，定义catmullrom的张力。

## 方法

共有方法请参见其基类[page:Curve]。

## 源代码

[link:https://github.com/mrdoob/three.js/blob/master/src/[path].js src/[path].js]