自己编写的一个用粒子系统编写的雨雪程序，其中包括纹理映射，以及背景音乐的播放，还有雨雪的切换！很不错的！-I have written a particle system with the rain and snow to prepare procedures, including texture mapping, as well as background music playback, as well as rain and snow of the switch! Very good!