实现了一个3D的机器人行走，我觉得这段代码很好地使用了glScalef，和glRotatef，实现了如何画出一个长方形，和机器人各部位的摆动-Implementation of a 3D robot walk, I think a good use of this code glScalef, and glRotatef, realized how to draw a rectangle, and each part of the sw