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91 lines
3.0 KiB
91 lines
3.0 KiB
2 years ago
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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:Curve] →
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<h1>椭圆曲线（[name]）</h1>
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<p class="desc">
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创建一个形状为椭圆的曲线。
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将[page:Number xRadius]与[page:Number yRadius]设为相等的值它将会成为一个圆。
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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.EllipseCurve(
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0, 0, // ax, aY
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10, 10, // xRadius, yRadius
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0, 2 * Math.PI, // aStartAngle, aEndAngle
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false, // aClockwise
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0 // aRotation
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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 ellipse = 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:Float aX], [param:Float aY], [param:Float xRadius], [param:Float yRadius], [param:Radians aStartAngle], [param:Radians aEndAngle], [param:Boolean aClockwise], [param:Radians aRotation] )</h3>
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<p>
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[page:Float aX] – 椭圆的中心的X坐标，默认值为*0*。<br/>
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[page:Float aY] – 椭圆的中心的Y坐标，默认值为*0*。<br/>
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[page:Float xRadius] – X轴向上椭圆的半径，默认值为*1*。<br/>
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[page:Float yRadius] – Y轴向上椭圆的半径，默认值为*1*。<br/>
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[page:Radians aStartAngle] – 以弧度来表示，从正X轴算起曲线开始的角度，默认值为*0*。<br/>
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[page:Radians aEndAngle] – 以弧度来表示，从正X轴算起曲线终止的角度，默认值为*2 x Math.PI*。<br/>
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[page:Boolean aClockwise] – 椭圆是否按照顺时针方向来绘制，默认值为*false*。<br/>
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[page:Radians aRotation] – 以弧度表示，椭圆从X轴正方向逆时针的旋转角度（可选），默认值为*0*。<br/><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:Float aX]</h3>
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<p>椭圆的中心的X坐标。</p>
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<h3>[property:Float aY]</h3>
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<p>椭圆的中心的Y坐标。</p>
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<h3>[property:Radians xRadius]</h3>
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<p>X轴向上椭圆的半径。</p>
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<h3>[property:Radians yRadius]</h3>
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<p>Y轴向上椭圆的半径。</p>
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<h3>[property:Float aStartAngle]</h3>
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<p>以弧度来表示，从正右侧算起曲线开始的角度。</p>
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<h3>[property:Float aEndAngle]</h3>
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<p>以弧度来表示，从正右侧算起曲线终止的角度。</p>
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<h3>[property:Boolean aClockwise]</h3>
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<p>椭圆是否按照顺时针方向来绘制。</p>
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<h3>[property:Float aRotation]</h3>
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<p>以弧度表示，椭圆在X轴正方向逆时针的旋转角度（可选），默认值为*0*。</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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