/*
 * Class that represents a particle in a particle system
 */
class util.Particle {
	
	private var xPos:Number;
	private var yPos:Number;
	private var speed:Number;
	private var targetMC:MovieClip;
	private var particleMC:MovieClip;
	
	/*
	 * CONSTRUCTOR
	 * @x: the x position of this particle
	 * @y: the y position of this particle
	 * @symbol: the graphical representation of this particle
	 * @target: the movieclip where this particle should be rendered
	 */
	public function Particle(x:Number, y:Number, velocity:Number, symbol:String, target:MovieClip) {
		var d = target.getNextHighestDepth();
		targetMC = target;
		particleMC = targetMC.attachMovie(symbol, symbol+"_"+velocity, d);
		setXPos(x);
		setYPos(y);
		setSpeed(velocity);
	}
	
	/*
	 * Removes this particle from stage
	 */
	public function remove() {
		particleMC.unloadMovie();
	}
	
	/*
	 * Sets the x postion of this particle
	 * @x: the new x position
	 */
	public function setXPos(x:Number):Boolean{
		if(!isNaN(x)){
			this.xPos = x;
			particleMC._x = xPos;
			return true;
		}
		return false;
	}
	
	/*
	 * Returns the x position of this particle
	 */
	public function getXPos():Number{
		return xPos;
	}
	
	/*
	 * Sets the y postion of this particle
	 * @x: the new y position
	 */
	public function setYPos(y:Number):Boolean{
		if(!isNaN(y)){
			this.yPos = y;
			particleMC._y = yPos;
			return true;
		}
		return false;
	}
	
	/*
	 * Returns the y position of this particle
	 */
	public function getYPos():Number{
		return yPos;
	}
	
	/*
	 * Sets the speed of this particle
	 * @s: the new speed
	 */
	public function setSpeed(s:Number):Boolean{
		if(!isNaN(s)){
			this.speed = s;
			return true;
		}
		return false;
	}
	
	/*
	 * Returns the speed of this particle
	 */
	public function getSpeed():Number{
		return speed;
	}
	
	/*
	 * Sets the graphical representation of this particle
	 * @mc: the movieclip that is the graphical representation of this particle
	 
	public function setParticleMC(mc:MovieClip):Void {
		particleMC = mc;
	}*/
	
	/*
	 * Returns the reference to the graphical representation of this particle
	 */
	public function getParticleMC():MovieClip {
		return particleMC;
	}
	
}