我学计算机图形学--OpenGL时，用MFC方发做的一个机器人手臂（嘿嘿，实话，比较粗糙），但能旋转和拖拉，已经不容易了，适合初学者参考。-I studied computer graphics- OpenGL, use MFC sent us to do a robot arm (hey, the truth, a bit rough), but can rotate and drag, is no easy task, and for advanced users.