You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
82 lines
2.2 KiB
82 lines
2.2 KiB
2 years ago
|
<!DOCTYPE html>
|
||
|
|
<html lang="zh">
|
||
|
|
<head>
|
||
|
|
<meta charset="utf-8" />
|
||
|
|
<base href="../../../../" />
|
||
|
|
<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>代码示例</h2>
|
||
|
|
|
||
|
|
<code>
|
||
|
|
//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 );
|
||
|
|
</code>
|
||
|
|
|
||
|
|
<h2>例子</h2>
|
||
|
|
|
||
|
|
<p>
|
||
|
|
[example:webgl_geometry_extrude_splines WebGL / geometry / extrude / splines]
|
||
|
|
</p>
|
||
|
|
|
||
|
|
<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: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:.curveType]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>
|
||
|
|
|
||
|
|
<h2>源代码</h2>
|
||
|
|
|
||
|
|
<p>
|
||
|
|
[link:https://github.com/mrdoob/three.js/blob/master/src/[path].js src/[path].js]
|
||
|
|
</p>
|
||
|
|
</body>
|
||
|
|
</html>
|