摘要
DEM在众多领域有着广泛的应用,DEM生成算法已成为当前的一个研究热点。TIN是目前DEM的两种重要结构之一。提出基于三角形索引顶点数据结构的三维地形绘制算法。该算法对重复的三角形顶点数据只存储一次,避免了高程数据的重复存储;减少了绘制命令的调用次数;提高了绘制效率。
DEM has extensive application in numerous fields, and generating algorithm of DEM become a research focus. At the moment, TIN is one of two important structure of DEM. A Drawing Algorithm for Three-dimension topography base on Vertex Index Structure of TIN is presented. The triangular vertex date of DEM is stored only one time, the storage of redundant triangular vertex was avoided. Times of calling instruction of drawing topography were reduced. The efficiency of drawing topography was improved.
出处
《贵州大学学报（自然科学版）》
2008年第6期615-618,共4页
Journal of Guizhou University:Natural Sciences
基金
贵州省省长专项基金(黔省专合字2007-14)
国家教育部春晖计划(Z2004-1-520)
