该程序主要是采用GeoMipMap算法实现三维地形的渲染，算法对层次细节的不同点进行了处理，使得渲染效果更好，销量更高。-The program using GeoMipMap algorithms 3D terrain rendering processing algorithm on different points of the level of detail rendering better, higher sales.

该程序主要是采用四插数算法实现三维地形的渲染，算法对层次细节的不同点进行了处理，使得渲染效果更好，销量更高。-The program four plug number algorithm to achieve the 3D terrain rendering, different points of the algorithm on the level of detail processing, making rendering better, higher sales.

该程序主要是采用ROAM算法实现三维地形的渲染，算法对层次细节的不同点进行了处理，使得渲染效果更好，销量更高。-The program ROAM algorithm 3D terrain rendering algorithms deal with different levels of detail points, making better rendering higher sales.