里面包含了一个完整的游戏引擎，并根据游戏引擎写了一个碰撞检测程序，对于初学者和想自己写2D游戏引擎的用户很有帮助。-Which contains a complete game engine and game engine written in accordance with a collision detection procedure, for beginners and want to write 2D game engine users helpful.