http://www.opengl.org/resources/faq/technical/
http://www.xmission.com/~nate/tutors.html
http://www.opengl.org/resources/faq/technical/openglfaq.txt
http://iask.sina.com.cn/u/1698675670/ish?folderid=63703&page=0
http://blog.csdn.net/jiangnanyouzi/article/details/5564910