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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:Geometry] →
<h1>管道几何体（[name]）</h1>
<p class="desc">创建一个沿着三维曲线延伸的管道。</p>
<iframe id="scene" src="scenes/geometry-browser.html#TubeGeometry"></iframe>
<script>
// iOS iframe auto-resize workaround
if ( /(iPad|iPhone|iPod)/g.test( navigator.userAgent ) ) {
var scene = document.getElementById( 'scene' );
scene.style.width = getComputedStyle( scene ).width;
scene.style.height = getComputedStyle( scene ).height;
scene.setAttribute( 'scrolling', 'no' );
}
</script>
<h2>示例</h2>
<code>
function CustomSinCurve( scale ) {
THREE.Curve.call( this );
this.scale = ( scale === undefined ) ? 1 : scale;
}
CustomSinCurve.prototype = Object.create( THREE.Curve.prototype );
CustomSinCurve.prototype.constructor = CustomSinCurve;
CustomSinCurve.prototype.getPoint = function ( t ) {
var tx = t * 3 - 1.5;
var ty = Math.sin( 2 * Math.PI * t );
var tz = 0;
return new THREE.Vector3( tx, ty, tz ).multiplyScalar( this.scale );
};
var path = new CustomSinCurve( 10 );
var geometry = new THREE.TubeGeometry( path, 20, 2, 8, false );
var material = new THREE.MeshBasicMaterial( { color: 0x00ff00 } );
var mesh = new THREE.Mesh( geometry, material );
scene.add( mesh );
</code>
<h2>构造器</h2>
<h3>[name]([param:Curve path], [param:Integer tubularSegments], [param:Float radius], [param:Integer radialSegments], [param:Boolean closed])</h3>
<p>
path — [page:Curve] - 一个由基类[page:Curve]继承而来的路径。<br />
tubularSegments — [page:Integer] - 组成这一管道的分段数，默认值为64。<br />
radius — [page:Float] - 管道的半径，默认值为1。<br />
radialSegments — [page:Integer] - 管道横截面的分段数目，默认值为8。<br />
closed — [page:Boolean] 管道的两端是否闭合，默认值为false。<br />
</p>
<h2>属性</h2>
<p>共有属性请参见其基类[page:Geometry]。</p>
<h3>[property:Object parameters]</h3>
<p>
一个包含着构造函数中每个参数的对象。在对象实例化之后，对该属性的任何修改都不会改变这个几何体。
</p>
<h3>[property:Array tangents]</h3>
<p>
一个[page:Vector3]切线数组。
</p>
<h3>[property:Array normals]</h3>
<p>
一个[page:Vector3]法线数组。
</p>
<h3>[property:Array binormals]</h3>
<p>
一个[page:Vector3]次法线数组。
</p>
<h2>方法(Methods)</h2>
<p>共有方法请参见其基类[page:Geometry]。</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>
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