OpenGl入门，包括二维图形显示，旋转，鼠标事件和键盘事件-OpenGl entry, including the two-dimensional graphical display, rotation, mouse events and keyboard events

opengl，四个扇叶的风车，键盘点R风车开始转动，放开R风车转动停止。-Opengl, four blades of the windmill, the keyboard point R windmill began to turn, let go of R windmills rotation stops.

是一个对于opengl的初学者的一个关于如何做旋转的一个教程-It is an opengl for a beginner s tutorial on how to do rotation