OpenGLRobot例子。带有光照效果，并可以通过键盘或鼠标来改变光源的位置；用户可以通过键盘来旋转机器人的手臂或腿。-OpenGLRobot example. With lighting effects, and can be changed via the keyboard or mouse to position the light source users can use the keyboard to rotate the robot' s arm or leg.