public boolean willIntersect(GameObj obj){
		int next_x = pos_x + v_x;
		int next_y = pos_y + v_y;
		int next_obj_x = obj.pos_x + obj.v_x;
		int next_obj_y = obj.pos_y + obj.v_y;
		return (next_x + width >= next_obj_x
				&& next_y + height >= next_obj_y
				&& next_obj_x + obj.width >= next_x 
				&& next_obj_y + obj.height >= next_y);
	}