javascript
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three.js
mirror of https://github.com/tazdij/three.js.git


			
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		[page:Curve] &rarr;

		<h1>椭圆曲线（[name]）</h1>

		<p class="desc">
			创建一个形状为椭圆的曲线。
			将[page:Number xRadius]与[page:Number yRadius]设为相等的值它将会成为一个圆。
		</p>

		<h2>代码示例</h2>

		<code>
		const curve = new THREE.EllipseCurve(
			0,  0,            // ax, aY
			10, 10,           // xRadius, yRadius
			0,  2 * Math.PI,  // aStartAngle, aEndAngle
			false,            // aClockwise
			0                 // aRotation
		);

		const points = curve.getPoints( 50 );
		const geometry = new THREE.BufferGeometry().setFromPoints( points );

		const material = new THREE.LineBasicMaterial( { color: 0xff0000 } );

		// Create the final object to add to the scene
		const ellipse = new THREE.Line( geometry, material );
		</code>

		<h2>构造函数</h2>


		<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>
		<p>
			[page:Float aX] – 椭圆的中心的X坐标，默认值为*0*。<br/>
			[page:Float aY] – 椭圆的中心的Y坐标，默认值为*0*。<br/>
			[page:Float xRadius] – X轴向上椭圆的半径，默认值为*1*。<br/>
			[page:Float yRadius] – Y轴向上椭圆的半径，默认值为*1*。<br/>
			[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/>
			[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/>
			[page:Boolean aClockwise] – 椭圆是否按照顺时针方向来绘制，默认值为*false*。<br/>
			[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/>
		</p>

		<h2>属性</h2>
		<p>共有属性请参见其基类[page:Curve]。</p>

		<h3>[property:Float aX]</h3>
		<p>椭圆的中心的X坐标。</p>

		<h3>[property:Float aY]</h3>
		<p>椭圆的中心的Y坐标。</p>

		<h3>[property:Radians xRadius]</h3>
		<p>X轴向上椭圆的半径。</p>

		<h3>[property:Radians yRadius]</h3>
		<p>Y轴向上椭圆的半径。</p>

		<h3>[property:Float aStartAngle]</h3>
		<p>以弧度来表示，从正右侧算起曲线开始的角度。</p>

		<h3>[property:Float aEndAngle]</h3>
		<p>以弧度来表示，从正右侧算起曲线终止的角度。</p>

		<h3>[property:Boolean aClockwise]</h3>
		<p>椭圆是否按照顺时针方向来绘制。</p>

		<h3>[property:Float aRotation]</h3>
		<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>

		<h2>方法</h2>
		<p>共有方法请参见其基类[page:Curve]。</p>

		<h2>源代码</h2>

		<p>
			[link:https://github.com/mrdoob/three.js/blob/master/src/[path].js src/[path].js]
		</p>
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