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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>车削缓冲几何体（[name]）</h1>
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<p class="desc">创建具有轴对称性的网格，比如花瓶。车削绕着Y轴来进行旋转。</p>
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<iframe id="scene" src="scenes/geometry-browser.html#LatheGeometry"></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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const points = [];
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for ( let i = 0; i < 10; i ++ ) {
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points.push( new THREE.Vector2( Math.sin( i * 0.2 ) * 10 + 5, ( i - 5 ) * 2 ) );
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}
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const geometry = new THREE.LatheGeometry( points );
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const material = new THREE.MeshBasicMaterial( { color: 0xffff00 } );
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const lathe = new THREE.Mesh( geometry, material );
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scene.add( lathe );
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</code>
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<h2>构造器</h2>
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<h3>[name]([param:Array points], [param:Integer segments], [param:Float phiStart], [param:Float phiLength])</h3>
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<p>
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points — 一个Vector2对象数组。每个点的X坐标必须大于0。 Default is an array with (0,-0.5), (0.5,0) and (0,0.5) which creates a simple diamond shape.<br />
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segments — 要生成的车削几何体圆周分段的数量，默认值是12。<br />
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phiStart — 以弧度表示的起始角度，默认值为0。<br />
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phiLength — 车削部分的弧度（0-2PI）范围，2PI将是一个完全闭合的、完整的车削几何体，小于2PI是部分的车削。默认值是2PI。
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</p>
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<p>
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基于参数创建一个LatheGeometry。
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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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<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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