说明：  基于MFC的OpenGL编程,简单的实现了绘制茶壶,三维长方体的绘制,相应键盘操作转动及茶壶和长方体的纹理映射和环境映射，外加贝塞尔曲面和Nurbs曲面绘制
(Based on MFC of OpenGL programming, simple implementation drawing teapot, 3 d drawing of the cuboid, the corresponding keyboard rotation and the teapot and texture mapping of the cuboid and environmental mapping, plus Bessel curved surface and the drawing of Nurbs surface)