WIN32环境下的OPENGL编程。实现功能：通过构建二次方程绘制三维图形，光照和材料设置，圆柱体上下表面封闭处理，键盘控制物体的旋转，缩放和移动。-WIN32 environment OPENGL programming. Function: quadratic equation by constructing three-dimensional graphics rendering, lighting and material set, the upper and lower surface