该程序基于VC++语言和OPenGL语言相结合，利用OPenGL中粒子系统原理，在MFC界面内完成绘制从天空下雨的3D仿真效果。该界面中主要以其中一点为中兴点喷射弧形粒子，达到仿真效果。-The program is based on VC++ language and OPenGL language, combining use OPenGL particles in the system principle, in MFC interface to finish drawing from t