VC环境下多层次DEM的算法实现

Algorithm Realization Of LOD DEM In VC

为了实现数字地面模型的多层次显示,设计了一种基于三角形折叠的LOD的快速算法,首先利用分块扩展算法建立DEM,然后设定高程阀值,用LOD算法进行模型的简化,该方法十分方便模型的简化和还原操作,最后调用OpenGL函数实现了模型的可视化。

In order to realizing LOD of DEM, this paper designs a fast algorithm based on folding of triangle. It makes use of the blocked algorithm to build DEM, and sets an elevation valve value, and simplifies model by using LOD algorithm. The operations of model simplification and model disoxidation are very convenient by using this method, it calls OpenGL to realize the model Visualization.