十分好的一个飞行D3D程序实例，包含程序源代码，代码简单易懂，对初学者十分有好处，同事讲解了，非自由视角的实现方法和一定的碰撞检测技术-Very good example of a flight D3D program, including source code, the code is simple to understand, very good for beginners, colleagues explain, non-free perspective to achieve a cer