public Entity(int x, int y, int id, int collisionType)
	{
		setX(x);setY(y);
		this.id = id;
		this.collisionType = collisionType;
		if (collisionType == Collidable.CT_CIRCLE)
			collisionRadii = new int[1];
		else if (collisionType == Collidable.CT_RECTANGLE){
			collisionRadii = new int[2];
		}
	}