计算机工程与应用 ›› 2011, Vol. 47 ›› Issue (21): 162-165.

• 图形、图像、模式识别 • 上一篇    下一篇

插值两个平行平面曲线的可展B样条曲面

方 逵1,2,朱幸辉1,唐 妥1,吴泉源3   

  1. 1.湖南农业大学 信息科学技术学院,长沙 410128
    2.长沙大学 计算机系,长沙 410003
    3.国防科技大学 计算机学院,长沙 410073
  • 收稿日期:1900-01-01 修回日期:1900-01-01 出版日期:2011-07-21 发布日期:2011-07-21

Developable B-spline surface for interpolating two parallel planar curves

FANG Kui1,2,ZHU Xinghui1,TANG Tuo1,WU Quanyuan3   

  1. 1.College of Information Science & Technology,Hunan Agricultural University,Changsha 410128,China
    2.Department of Computer Science,Changsha University,Changsha 410003,China
    3.School of Computer Science,National University of Defense Technology,Changsha 410073,China
  • Received:1900-01-01 Revised:1900-01-01 Online:2011-07-21 Published:2011-07-21

摘要: 两条位于平行平面上的分别是[n]次和[n+1]次B-样条曲线,以这两条曲线作边界生成一个直纹面,即[(n,n+1)]次B样条曲面,得到了该直纹面为可展曲面的充要条件,构造了(2,3)次可展B-样条曲面。通过对以上可展B样条曲面进行凸性分析,得到了(n,n+1)次可展B样条曲面为凸曲面的充要条件。给出了几个(2,3)次B-样条可展曲面。

关键词: 计算机辅助几何设计(CAGD), 可展曲面, B-样条曲线曲面, 凸曲面, 特征多边形

Abstract: When the two B-spline boundary curves of the ruled surface are in two parallel planes,a necessary and sufficient condition for a developable B-spline ruled surface of degree(n,n+1) is derived,and the developable B-spline surfaces of degree(2,3) are constructed.A necessary and sufficient condition for a developable B-spline convex ruled surface of degree(n,n+1) is obtained.A few developable B-spline ruled surfaces of degree(2,3) are given.

Key words: Computer Aided Geometry Design(CAGD), developable surface, B-spline curve surface, convex surface, characteristic polygon