http://dev.gameres.com/Program/Visual/3D/multistream.htm
SetStreamSource函數與數據流的使用
http://www.zxbc.cn/html/20071116/29530_2.html
D3DVERTEXELEMENT9的詳細解釋
http://blog.csdn.net/gamerefer/article/details/7825405
頂點着色器入門
http://www.cppblog.com/lovedday/archive/2008/04/06/46357.html