一个很好的3D与OpenGL结合的例子，实现多级齿轮的运动，效果很好，在运行程序时请先把提供的.dll文件拷贝到你的系统的 SYSTEM32目录下，否则不能运行！-a good combination of 3D and OpenGL example, multi-class sports gear, a good effect, and the operational procedures for the provision when the post. Dll files are copied to your system SYSTEM32 directory, they can run!