使用OpenGL库，C Builder环境下地形仿真系统三

代码说明：

利用OpenGL函数库，在C++Builder环境下实现三位地形的仿真显示，实现了对地图的放大，缩小，旋转，移动等操作，对不同的高程使用不同的颜色加以标记没，并增加了光照效果，使显示更逼真！-use OpenGL libraries, the C Builder environment under three terrain simulation showed that the realization of the right of the map to zoom, rotate, such as mobile operators, the use of different elevation of different colors, not to be labeled, and to increase the effects of light, shows a more realistic!