计算机工程与应用 ›› 2007, Vol. 43 ›› Issue (29): 40-42.

• 学术探讨 • 上一篇    下一篇

有理二次插值曲线的形状控制

邓四清1,方 逵2,3,谢 进4   

  1. 1.湘南学院 数学系,湖南 郴州 423000
    2.湖南师范大学 数学与计算机科学学院,长沙 410081
    3.长沙学院 计算机科学与技术系,长沙 410003
    4.合肥学院 数理系,合肥 230601
  • 收稿日期:1900-01-01 修回日期:1900-01-01 出版日期:2007-10-11 发布日期:2007-10-11
  • 通讯作者: 邓四清

Shape control of rational quadratic interpolating curve

DENG Si-qing1,FANG Kui2,3,XIE Jin4   

  1. 1.Department of Mathematics,Xiangnan University,Chenzhou,Hunan 423000,China 2.School of Mathematics and Computer,Hunan Normal University,Changsha 410081,China 3.Department of Computer Science and Technology,Changsha University,Changsha 410003,China 4.Department of Mathematics and Physics,Hefei University,Hefei 230601,China
  • Received:1900-01-01 Revised:1900-01-01 Online:2007-10-11 Published:2007-10-11
  • Contact: DENG Si-qing

摘要: 将插值曲线约束于给定的区域之内是曲线形状控制中的重要问题。构造了一种分母为二次的连续有理二次插值函数,这种有理二次插值函数中含有参数,因而给约束控制带来了方便。同时可以通过对参数的控制实现连续的插值。给出了将该种插值曲线约束于给定的折线、二次曲线之上、之下或之间的充分条件及将其约束于给定折线之上、之下或之间的充分必要条件。

关键词: 计算机应用, 曲线设计, 有理插值, 形状控制

Abstract: To constrain the interpolating curves to be bounded in the given region is an important problem in curve design.A rational quadratic interpolation function with quadratic denominators has been constructed.The sufficient conditions for the interpolating curves to be above,below or between the given broken lines or piecewise quadratic curves and the sufficient and necessary conditions for the interpolating curves to be above,below or between the given broken lines have been derived.

Key words: computer application, curve design, rational interpolation, shape control