本程序是一个简单的计算机图形学的课件程序，程序使用了OPENGL图形类库来设计的,实现的功能是画多边形,填充多边形颜色,同时还可以对图形变形,比如扩大缩小翻转等.-this procedure is a simple computer graphics courseware procedures, the procedures for the use of OpenGL graphics library to design and realize the function of drawing

用openGL写一个画球函数（可以是填充的，也可以使线或者点），不用glut里面的画球库函数，-A painted ball function (which can be filled with openGL write, so that the line or point), without glut paintings inside ball library functions,