public void fire(){
		final int dX = 3,dY = 3;
		if( lastDir==DirKey.Up || lastDir==DirKey.Down ){
			bullets.add(new Bullet(id,this.getCenter().x - dX, this.getCenter().y, lastDir));
		}
		else{
			bullets.add(new Bullet(id,this.getCenter().x, this.getCenter().y - dY, lastDir));
		}
			
	}