/**
 * @author hughes
 */

THREE.CircleGeometry = function ( radius, segments, thetaStart, thetaLength ) {

	THREE.Geometry.call( this );

	this.type = 'CircleGeometry';

	this.parameters = {
		radius: radius,
		segments: segments,
		thetaStart: thetaStart,
		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 );

};

THREE.CircleGeometry.prototype = Object.create( THREE.Geometry.prototype );
THREE.CircleGeometry.prototype.constructor = THREE.CircleGeometry;

THREE.CircleGeometry.prototype.clone = function () {

	var parameters = this.parameters;

	return new THREE.CircleGeometry(
		parameters.radius,
		parameters.segments,
		parameters.thetaStart,
		parameters.thetaLength
	);

};

/**
 * @author hughes
 */

THREE.CircleGeometry = function ( radius, segments, thetaStart, thetaLength ) {

	THREE.Geometry.call( this );

	this.type = 'CircleGeometry';

	this.parameters = {
		radius: radius,
		segments: segments,
		thetaStart: thetaStart,
		thetaLength: thetaLength
	};

	this.fromBufferGeometry( new THREE.CircleBufferGeometry( radius, segments, thetaStart, thetaLength ) );

};

THREE.CircleGeometry.prototype = Object.create( THREE.Geometry.prototype );
THREE.CircleGeometry.prototype.constructor = THREE.CircleGeometry;

THREE.CircleGeometry.prototype.clone = function () {

	var parameters = this.parameters;

	return new THREE.CircleGeometry(
		parameters.radius,
		parameters.segments,
		parameters.thetaStart,
		parameters.thetaLength
	);

};

Use CircleBufferGeometry internally.