基于二位纹理技术、粒子系统的气象要素二维模拟，能够很好的模拟下雨、雪的自然现象；也能模拟各种条件下的云状、云色，和存在风等 条件下云的自然变动-2 texture-based technology, particle system of two-dimensional simulation of the meteorological factors, the simulation can be a very good rain, snow natural phenomenon also ca