OpenGL中对于天空的绘制,本文提供的则是天空顶技术。就是绘制一个球体然后赋予材质，可以很好的达到模拟天空的效果。使球体慢慢移动，就可以模拟云彩流动的效果。 -OpenGL rendering of the sky, this article was provided by the sky roof technology. Drawing a sphere is then given material, can achieve a good simulation of the effect