OpenGL扩展提供了一个很好的方式来增强OpenGL的功能，它依赖于你用户的GPU。 虽然现在扩展属于高级用法（因为大部分功能在核心中已经有了），了解扩展如何运作和怎么用它提高软件性能（付出更高的维护代价）还是很重要的。

在OpenGL中使用顶点法向 在OpenGL中使用法向很简单。 法向是顶点的属性，就像位置，颜色，UV坐标等一样；按处理其他属性的方式处理即可。 第七课的loadOBJ函数已经将它们从OBJ文件中读出来了。

OpenGL is a well-known standard for generating 3-D as well as 2-D graphics that is extremely powerful and has many capabilities. OpenGL is defined and released by the OpenGL Architecture Review Board ...

Excellent coverage of principles and applications of computer graphics. OpenGL.org OpenGL documentation, code and links. NeHe OpenGL Tutorials A series of tutorials and articles covering simple to ...

I recently came in here asking for help in learning how to do basic graphics operations in C++ and someone in here (thank you whoever you are) sent me over to Nehe's OpenGL tutorials page ...