http://blog.csdn.net/xoyojank/article/details/5734537
http://john-chapman-graphics.blogspot.com/2013/01/ssao-tutorial.html
http://developer.download.nvidia.com/SDK/10.5/direct3d/Source/ScreenSpaceAO/doc/ScreenSpaceAO.pdf
原文：http://www.cnblogs.com/minggoddess/p/3910576.html