实现机器人带光照的绘制和运动变换。通过glPushMatrix() 和glPopMatrix()绘制出机器人层次结构模型和几何变换，要求实现机器人手、脚、头、肩膀的旋转等几何变换，能够实现机器人走路的效果。同时机器人应打上光照。(It realizes the robot's rendering and motion transformation with illumination. By glPushMatrix () and glPopMatrix (), the robot hierarchy model and geometric transformation are plotted, and the geometric transformation of the robot's hand, foot, head and shoulder is required to realize the robot's walking effect. At the same time, the robot should hit the light.)