CircleGeometry: Use CircleBufferGeometry internally.

src/extras/geometries/CircleGeometry.js

@@ -15,43 +15,7 @@ THREE.CircleGeometry = function ( radius, segments, thetaStart, thetaLength ) {
 		thetaLength: thetaLength
 	};
 
-	radius = radius || 50;
-	segments = segments !== undefined ? Math.max( 3, segments ) : 8;
-
-	thetaStart = thetaStart !== undefined ? thetaStart : 0;
-	thetaLength = thetaLength !== undefined ? thetaLength : Math.PI * 2;
-
-	var i, uvs = [],
-	center = new THREE.Vector3(), centerUV = new THREE.Vector2( 0.5, 0.5 );
-
-	this.vertices.push( center );
-	uvs.push( centerUV );
-
-	for ( i = 0; i <= segments; i ++ ) {
-
-		var vertex = new THREE.Vector3();
-		var segment = thetaStart + i / segments * thetaLength;
-
-		vertex.x = radius * Math.cos( segment );
-		vertex.y = radius * Math.sin( segment );
-
-		this.vertices.push( vertex );
-		uvs.push( new THREE.Vector2( ( vertex.x / radius + 1 ) / 2, ( vertex.y / radius + 1 ) / 2 ) );
-
-	}
-
-	var n = new THREE.Vector3( 0, 0, 1 );
-
-	for ( i = 1; i <= segments; i ++ ) {
-
-		this.faces.push( new THREE.Face3( i, i + 1, 0, [ n.clone(), n.clone(), n.clone() ] ) );
-		this.faceVertexUvs[ 0 ].push( [ uvs[ i ].clone(), uvs[ i + 1 ].clone(), centerUV.clone() ] );
-
-	}
-
-	this.computeFaceNormals();
-
-	this.boundingSphere = new THREE.Sphere( new THREE.Vector3(), radius );
+	this.fromBufferGeometry( new THREE.CircleBufferGeometry( radius, segments, thetaStart, thetaLength ) );
 
 };