d3d点精灵做的2D横版射击游戏。刚刚学的时候做的。水平不高，新人可以参考。结构和可扩展性，还不错。资源利用需改进。-d3d point sprites do 2D horizontal shooter. Just learn when to do it. The level is not high, the newcomers can reference. Structure and scalability, pretty good. Resource utilization needs to