一个飞行动力学模拟系统的源码，有参考价值，-a flight dynamics simulation system source code, the reference value, thank you

飞行动力学模拟系统 模拟一架飞机在一个地形上空飞行的全过程，用户可以使用键盘对飞机进行控制，如飞机的俯仰、偏航、加速等操作，观看飞机飞行的变化。-Flight dynamics simulation system Simulation of an aircraft in a terrain flying over the whole process, the user can use the keyboard to control the aircraft, such as pitch,