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<!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:BufferGeometry] →
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<h1>管道缓冲几何体（[name]）</h1>
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<p class="desc">创建一个沿着三维曲线延伸的管道。</p>
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<iframe id="scene" src="scenes/geometry-browser.html#TubeGeometry"></iframe>
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<script>
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// iOS iframe auto-resize workaround
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if ( /(iPad|iPhone|iPod)/g.test( navigator.userAgent ) ) {
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const scene = document.getElementById( 'scene' );
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scene.style.width = getComputedStyle( scene ).width;
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scene.style.height = getComputedStyle( scene ).height;
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scene.setAttribute( 'scrolling', 'no' );
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}
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</script>
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<h2>代码示例</h2>
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<code>
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class CustomSinCurve extends THREE.Curve {
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constructor( scale = 1 ) {
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super();
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this.scale = scale;
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}
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getPoint( t, optionalTarget = new THREE.Vector3() ) {
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const tx = t * 3 - 1.5;
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const ty = Math.sin( 2 * Math.PI * t );
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const tz = 0;
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return optionalTarget.set( tx, ty, tz ).multiplyScalar( this.scale );
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}
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}
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const path = new CustomSinCurve( 10 );
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const geometry = new THREE.TubeGeometry( path, 20, 2, 8, false );
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const material = new THREE.MeshBasicMaterial( { color: 0x00ff00 } );
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const mesh = new THREE.Mesh( geometry, material );
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scene.add( mesh );
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</code>
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<h2>构造器</h2>
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<h3>[name]([param:Curve path], [param:Integer tubularSegments], [param:Float radius], [param:Integer radialSegments], [param:Boolean closed])</h3>
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<p>
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path — [page:Curve] - 一个由基类[page:Curve]继承而来的3D路径。 Default is a quadratic bezier curve.<br />
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tubularSegments — [page:Integer] - 组成这一管道的分段数，默认值为64。<br />
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radius — [page:Float] - 管道的半径，默认值为1。<br />
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radialSegments — [page:Integer] - 管道横截面的分段数目，默认值为8。<br />
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closed — [page:Boolean] 管道的两端是否闭合，默认值为false。<br />
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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:BufferGeometry]。</p>
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<h3>[property:Object parameters]</h3>
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<p>
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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。
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</p>
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<h3>[property:Array tangents]</h3>
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<p>
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一个[page:Vector3]切线数组。
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</p>
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<h3>[property:Array normals]</h3>
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<p>
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一个[page:Vector3]法线数组。
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</p>
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<h3>[property:Array binormals]</h3>
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<p>
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一个[page:Vector3]次法线数组。
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</p>
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<h2>方法(Methods)</h2>
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<p>共有方法请参见其基类[page:BufferGeometry]。</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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