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70 lines
1.7 KiB
70 lines
1.7 KiB
<!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:Curve] →
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<h1>二维二次贝塞尔曲线（[name]）</h1>
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<p class="desc">
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创建一条平滑的二维
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<a href="http://en.wikipedia.org/wiki/B%C3%A9zier_curve#mediaviewer/File:B%C3%A9zier_2_big.gif" target="_blank">二次贝塞尔曲线</a>，
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由起点、终点和一个控制点所定义。
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</p>
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<h2>代码示例</h2>
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<code>
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const curve = new THREE.QuadraticBezierCurve(
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new THREE.Vector2( -10, 0 ),
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new THREE.Vector2( 20, 15 ),
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new THREE.Vector2( 10, 0 )
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);
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const points = curve.getPoints( 50 );
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const geometry = new THREE.BufferGeometry().setFromPoints( points );
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const material = new THREE.LineBasicMaterial( { color: 0xff0000 } );
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//Create the final object to add to the scene
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const curveObject = new THREE.Line( geometry, material );
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</code>
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<h2>构造函数</h2>
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<h3>[name]( [param:Vector2 v0], [param:Vector2 v1], [param:Vector2 v2] )</h3>
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<p>
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[page:Vector2 v0] – 起点<br/>
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[page:Vector2 v1] – 中间的控制点<br/>
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[page:Vector2 v2] – 终点<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:Curve]。</p>
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<h3>[property:Vector2 v0]</h3>
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<p>起点</p>
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<h3>[property:Vector2 v1]</h3>
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<p>控制点</p>
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<h3>[property:Vector2 v2]</h3>
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<p>终点</p>
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<h2>方法</h2>
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<p>共有方法请参见其基类[page:Curve]。</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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