OPGL源代码，演示了OPGL的面与物体的构成，以及3维物体的旋转，移动，放大等操作。并提供了背景设置，光影等效果的控制。适合于OPGL入门.-OPGL source code, OPGL demonstration of the surface and the composition of objects, as well as three-dimensional object rotation, Mobile, zooming etc. And provided background set