一个OPENGL演示的例子，例子中的场景包含运动的云,流动的水室外山地,雾状效果以及灯光效果，而且该例子利用C++开发，便于初学者学习-OPENGL example of a demonstration, for example, contains scenes of cloud movement, the movement of water outside the mountain, fog effects and lighting effects, and the examples of u