基于opengl函数图形库设置照相机功能，实现在三维场景中的逼真漫游-Based on the opengl function graphic library function in the camera Settings of lifelike 3d scene roamed

openGL的入门教程，由例子逐步了解openGL的基本原理和基本函数的应用，非常适合于初学者入门！-OpenGL introductory tutorial by example to develop an understanding of the basic principles and the basic function of openGL, very suitable for beginners entry!