利用openGL实现了三维图形茶壶、球、圆锥、圆环、正方体的绘制、平移、旋转、缩放等简单功能，是openGL入门的好示例。-OpenGL achieved using three-dimensional graphics teapot, ball, cone, ring, cube mapping, shifting, rotating, zooming and other simple functions, it is a good example of openGL entry.