计算机工程与应用 ›› 2009, Vol. 45 ›› Issue (24): 235-237.DOI: 10.3778/j.issn.1002-8331.2009.24.071

• 工程与应用 • 上一篇    下一篇

Delaunay三角网剖分的约束边嵌入改进算法

陈学工1,李 源1,曹 建1,肖克炎2   

  1. 1.中南大学 信息科学与工程学院,长沙 410083
    2.中国地质科学院 矿产资源研究所,北京 100037
  • 收稿日期:2008-05-08 修回日期:2008-07-31 出版日期:2009-08-21 发布日期:2009-08-21
  • 通讯作者: 陈学工

Improved algorithm of inserting constrained edge into Delaunay triangulation

CHEN Xue-gong1,LI Yuan1,CAO Jian1,XIAO Ke-yan2
  

  1. 1.School of Information Science and Engineering,Central South University,Changsha 410083,China
    2.Institute of Resources,Chinese Academy of Geological Science,Beijing 100037,China
  • Received:2008-05-08 Revised:2008-07-31 Online:2009-08-21 Published:2009-08-21
  • Contact: CHEN Xue-gong

摘要: 重点研究约束边强行嵌入D-三角网的问题。约束边嵌入是解决D-三角网转变为CD-三角网的一种非常有效的方法,而CD-三角网才能真实地虚拟地形地貌。针对基于凸凹判定的对角线交换算法存在的缺陷,提出“分裂约束边”的思想完善算法的健壮性,并引入快速点定位算法以提高算法的执行效率。

关键词: 约束边, Delaunay三角剖分, 对角线, 凸凹性

Abstract: This paper focuses on researching the problem of inserting constrained edge into D-Triangulation.It is a very effective method of changing D-Triangulation into CD-Triangulation that constrained edge is inserted into D-Triangulation,and only CD-Triangulation can present real terrain and relief.According to the shortcoming of the diagonal line exchange algorithm which is based on convexo-concave,this paper proposes an idea of “split -restraint” to improve the robustness of the algorithm and introduces the rapid point positioning algorithm to enhance the efficiency of the algorithm.

Key words: constrained edge, Delaunay triangulation, diagonal, convexo-concave

中图分类号: