平面电子地形图的三维化关键技术研究

Study on the 3D pivotal technique of plane electronic relief map

对平面地形图DXF文件进行分析并且读取图中的地形数据,基于Delaunay三角网理论,利用数据逐点插入算法、空间对象检索机制以及局部最优方法(LOP)动态地构建不规则三角网,重点提出了深度调整的方法,最后利用OpenGL技术绘制真实感地形。

This paper analyses the the file of DXF and accesses the data of terrain, based on the Delaunay triangulation theory, constructs triangulated irregular network based on the incremental insertion algorithm, mechanism of search of interspace object and recursion local optimization procedure. Then it draws the 3D-terrain utilizing the OpenGL.