[page:Geometry] →
		[name]
		A class for generating a two-dimensional ring geometry.
		
		Example
		var geometry = new THREE.RingGeometry( 1, 5, 32 );
		var material = new THREE.MeshBasicMaterial( { color: 0xffff00, side: THREE.DoubleSide } );
		var mesh = new THREE.Mesh( geometry, material );
		scene.add( mesh );
		
		Constructor
		[name]([page:Float innerRadius], [page:Float outerRadius], [page:Integer thetaSegments], [page:Integer phiSegments], [page:Float thetaStart], [page:Float thetaLength])
		
		innerRadius — Default is 0, but it doesn't work right when innerRadius is set to 0.
		outerRadius — Default is 50. 
		thetaSegments — Number of segments.  A higher number means the ring will be more round.  Minimum is 3.  Default is 8. 
		phiSegments — Minimum is 1.  Default is 8.
		thetaStart — Starting angle. Default is 0. 
		thetaLength — Central angle.  Default is Math.PI * 2.
		
		Source
		[link:https://github.com/mrdoob/three.js/blob/master/src/[path].js src/[path].js]