三维球体的光照模型，光学属性模拟。是计算机图形学真实感显示与光照部分的重要内容-Three-dimensional sphere illumination model, the optical properties of the simulation. Photorealistic computer graphics display and illumination important part of the contents

传统几何光学成像,成像仿真，光纤追迹，可以实现模拟成像-geometric optics