1.　　在练习8的基础上，实现Deferred Shading算法；

考察目的：

1.　　阅读文献，理解并实现文献中算法；

2.　　通过FrameBufferObject实现render-to-texture技术；

3.　　实现multiple-render-targets技术；

-Deferred Shading algorithm on the basis of Exercise 8　aim to investigate: 1. Reading literature, understanding and literature algorithm　FrameBufferObject achieve the render-to-texture technology　3. Multiple-render-targets technology