这个程序是在vc下面写的，基于opgl编程，在卫星绕地球旋转的工程中加入了卫星对地球的照射过程，代码非常精简，并加入了注释。-the procedure is written in vc below, based on opgl programming, the satellite orbits around the Earth works to add a satellite of the Earth's radiation process, code very concise and