第5月第24天 线性变换 opengl

1.

http://news.qiyeku.com/news_837979.html

2. opengl

+ (Class)layerClass { 
    return [CAEAGLLayer class]; 
} 

http://www.cnblogs.com/salam/p/5113572.html

http://blog.csdn.net/wanglixin1999/article/details/51792505

http://www.cnblogs.com/bigly/p/5806186.html