计算机科学 ›› 2008, Vol. 35 ›› Issue (2): 235-237.

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基于双域双向水平倾角最小化圈绕的凸壳新算法

  

  • 出版日期:2018-11-16 发布日期:2018-11-16

  • Online:2018-11-16 Published:2018-11-16

摘要: 本文依据同构化凸壳构造基本定理,提出效率更高的双域双向水平倾角最小化圈绕凸壳新算法。本新算法的同构化特点是:1)“初始顶点与双域生成”处理:找出给定二维点集S的最低点和最高点,即Y轴坐标值最小点(若有多个最小点,则只取最左的最小点)和Y轴坐标值最大点(若有多个最大点,则只取最左的最大点),作为凸壳(逆时针圈绕的)A向初始顶点、(顺时针圈绕的)B向初始顶点;并以这两个初始顶点为端点的线段,把原二维点集划分为两个独立的子点集S右、S左。2)在S右内,进行双向“圈绕寻找下一新顶点”即凸壳A向、B向最新顶点寻找处

关键词: 同构化 凸壳算法 顶点射线 水平倾角 双域双向圈绕

Abstract: According to the isomorphic fundamental theorem of the convex hull construction, a more efficient new algorithm to find a convex hull based on coiling with a minimum lever pitch in double domain and double direction is advanced. This new algorithm isomorp

Key words: Isomorphic, Convex hull algorithm, Vertex's half line, Pitch of base Lines,Double domain and double direction coiling

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