OPENGL中，利用GLUT中的已知函数实现对基本图形的绘制，如茶壶等，还可以通过修改参数实现缩放，旋转，平移等-OPENGL, using the known GLUT functions to achieve the basic graphics rendering, such as teapots, etc., can also be achieved by modifying the parameter scaling, rotation, translation, etc.