• 中国计算机学会会刊
  • 中国科技核心期刊
  • 中文核心期刊

J4 ›› 2006, Vol. 28 ›› Issue (2): 39-40.

• 论文 • 上一篇    下一篇

高斯图边界测定算法的改进

欧新良[1,2] 陈松乔[1] 方逵[2]   

  • 出版日期:2006-02-01 发布日期:2010-05-20

  • Online:2006-02-01 Published:2010-05-20

摘要:

自由曲面的高斯图上高斯抛物线与曲面边界线可能相交,也可能相切。T.S.Smish和R.T.Farouki提出的高斯图外边界测定算法只考虑了高斯抛物线与边界相交的情况。本 文分析了该算法的局限性,提出了适应性更强的新算法,并给出了新算法的证明。最后给出了一个计算实例。

关键词: 自由曲面 高斯图 高斯抛物线

Abstract:

The Gaussian parabolic line on the Gaussian map of the free-form surface alternatively intersects or is tangent to its boundary. An algorithm given byT. S. Smish and R. T. Farouki to determine the outermost boundary of the Gaussian map consideres barely the intersection. The limitations of the old algorithm is analyzed theoretically in this paper, and a better algorithm and its proof are given. At last,a computing example is offered.

Key words: free-form surface ;Gaussian map, Gaussian parabolic line