熟练掌握光照模型的基本原理，尤其要了解简单光照模型的计算方法，深刻领会Gouraud明暗处理和Phong明暗处理的原理和算法。-Master the basic principles of illumination model, in particular, to understand the simple illumination model calculation, a profound understanding of Gouraud shading and Phong shading p