http://www.cnblogs.com/not-code/archive/2011/07/16/2108369.html
http://blog.csdn.net/liuhongwei123888/article/details/6340757
http://blog.csdn.net/liuhongwei123888/article/details/6618408
http://houchangxi.iteye.com/blog/1012490
http://blog.csdn.net/l_serein/article/details/6618327
----------------灵动三维 提供