这是我找了很久才找到的模拟下雪效果最好的源码，粒子系统很完善，雪花采用贴图实现，加上雾效果，整体感觉非常真实。-This is what I look for a long time simulation to find the best snow of the source, particle system is perfect, alabaster realize the use of mapping, together with the fog effect, the overall fe