lookat

代码说明：

  Qt平台下使用,C++语言所实现的,球体位置变化,并相应的视角跟踪以及变换.对于学习,OpenGL的glLookAt很有帮助.(Qt platform used by the C language to achieve, and ball position change, Perspective and the corresponding tracking and transform. For the study, OpenGL glLookAt helpful.)