/**
 * @author alteredq / http://alteredqualia.com/
 */

THREE.SpotLight = function ( color, intensity, distance, angle, exponent, decay ) {

	THREE.Light.call( this, color );

	this.type = 'SpotLight';

	this.position.set( 0, 1, 0 );
	this.target = new THREE.Object3D();

	this.intensity = ( intensity !== undefined ) ? intensity : 1;
	this.distance = ( distance !== undefined ) ? distance : 0;
	this.angle = ( angle !== undefined ) ? angle : Math.PI / 3;
	this.exponent = ( exponent !== undefined ) ? exponent : 10;
	this.decay = ( decay !== undefined ) ? decay : 1;	// for physically correct lights, should be 2.

	this.castShadow = false;
	this.onlyShadow = false;

	//

	this.shadowCameraNear = 50;
	this.shadowCameraFar = 5000;
	this.shadowCameraFov = 50;

	this.shadowCameraVisible = false;

	this.shadowBias = 0;
	this.shadowDarkness = 0.5;

	this.shadowMapWidth = 512;
	this.shadowMapHeight = 512;

	//

	this.shadowMap = null;
	this.shadowMapSize = null;
	this.shadowCamera = null;
	this.shadowMatrix = null;

};

THREE.SpotLight.prototype = Object.create( THREE.Light.prototype );
THREE.SpotLight.prototype.constructor = THREE.SpotLight;

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

	var light = new THREE.SpotLight();

	THREE.Light.prototype.clone.call( this, light );

	light.target = this.target.clone();

	light.intensity = this.intensity;
	light.distance = this.distance;
	light.angle = this.angle;
	light.exponent = this.exponent;
	light.decay = this.decay;

	light.castShadow = this.castShadow;
	light.onlyShadow = this.onlyShadow;

	//

	light.shadowCameraNear = this.shadowCameraNear;
	light.shadowCameraFar = this.shadowCameraFar;
	light.shadowCameraFov = this.shadowCameraFov;

	light.shadowCameraVisible = this.shadowCameraVisible;

	light.shadowBias = this.shadowBias;
	light.shadowDarkness = this.shadowDarkness;

	light.shadowMapWidth = this.shadowMapWidth;
	light.shadowMapHeight = this.shadowMapHeight;

	return light;

};