在c语言中使用opengl编程，在窗口中绘制三维球体，使用键盘中的上下左右方向键，左右键使得球体左右移动，上下坚实的球体朝里或朝外移动，但当向外移动到一定程度时，上下键功能相反-C language using opengl programming, rendering three-dimensional sphere in the window, use the up and down the keyboard arrow keys, left and right keys making sphere move around, up and down a solid sphere inward or outward movement, but moves outward to a certain extent , opposite the arrow keys function