摘要： 实验使用一种结合滤波法和四叉树的两片融合算法对格网模型进行简化，包括基于高程准则的格网模型简化和基于倾角准则的格网模型简化，并利用点、线、面拓扑结构和正负区判别准则构建不规则三角网（”ＦＩＮ）．在上述两种算法的基础上，结合ＴＩＮ的简化算法，应用ＯｐｅｎＧＬ平台初步实现复杂地质体三维建模工作，取得满意的效果．

关键词: 格网模型简化, 不规则三角网, 正负区判别模型, 不规则三角网简化

Abstract: Quad tree facets fusion algorithm and filter algorithm are applied in this paper for grided model simplification, including the simplification based on criterion of elevation and that on criterion of inclination. The paper also puts forward method of creating TIN (Triangulated Irregular Network) by using the criterion of positive and negative region for discriminating legitimization of points, on the basis of creating topologic structure about the point, line. and area. Based on it, together with simplification algorithm of TIN, we construct 3D models for complicated geological entity on the Platform of Open GL, and the effect is good.

中图分类号: 

• TP399