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three.js
镜像来自 https://github.com/mrdoob/three.js.git


			
				
					
						
						
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		[page:BufferGeometry] &rarr;

		<h1>[name]</h1>

		<p class="desc">A class for generating a two-dimensional ring geometry.</p>

		<iframe id="scene" src="scenes/geometry-browser.html#RingGeometry"></iframe>

		<script>

		// iOS iframe auto-resize workaround

		if ( /(iPad|iPhone|iPod)/g.test( navigator.userAgent ) ) {

			const scene = document.getElementById( 'scene' );

			scene.style.width = getComputedStyle( scene ).width;
			scene.style.height = getComputedStyle( scene ).height;
			scene.setAttribute( 'scrolling', 'no' );

		}

		</script>
		<h2>Code Example</h2>

		<code>
const geometry = new THREE.RingGeometry( 1, 5, 32 ); 
const material = new THREE.MeshBasicMaterial( { color: 0xffff00, side: THREE.DoubleSide } );
const mesh = new THREE.Mesh( geometry, material ); scene.add( mesh );
		</code>

		<h2>Constructor</h2>

		<h3>
			[name]([param:Float innerRadius], [param:Float outerRadius],
			[param:Integer thetaSegments], [param:Integer phiSegments], [param:Float thetaStart], [param:Float thetaLength])
		</h3>
		<p>
			innerRadius — Default is `0.5`. <br />
			outerRadius — Default is `1`. <br />
			thetaSegments — Number of segments. A higher number means the ring will be
			more round. Minimum is `3`. Default is `32`. <br />
			phiSegments — Number of segments per ring segment. Minimum is `1`. Default is `1`.<br />
			thetaStart — Starting angle. Default is `0`. <br />
			thetaLength — Central angle. Default is Math.PI * 2.
		</p>

		<h2>Properties</h2>
		<p>See the base [page:BufferGeometry] class for common properties.</p>

		<h3>[property:Object parameters]</h3>
		<p>
			An object with a property for each of the constructor parameters. Any
			modification after instantiation does not change the geometry.
		</p>

		<h2>Methods</h2>
		<p>See the base [page:BufferGeometry] class for common methods.</p>

		<h2>Source</h2>

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