计算机工程与应用 ›› 2011, Vol. 47 ›› Issue (34): 26-28.

• 博士论坛 • 上一篇    下一篇

计算点到平面NURBS曲线的最小距离

展俊德,李锡文,史铁林   

  1. 华中科技大学 机械科学与工程学院,武汉 430074
  • 收稿日期:1900-01-01 修回日期:1900-01-01 出版日期:2011-12-01 发布日期:2011-12-01

Calculating minimum distance between point and planar NURBS curve

ZHAN Junde,LI Xiwen,SHI Tielin   

  1. School of Mechanical Science and Engineering,Huazhong University of Science and Technology,Wuhan 430074,China
  • Received:1900-01-01 Revised:1900-01-01 Online:2011-12-01 Published:2011-12-01

摘要: 提出了一种利用控制顶点投影法计算点到平面NURBS曲线最小距离的算法。将控制顶点投影到平面NURBS曲线上,投影点将平面NURBS曲线分割成若干曲线段;计算点到各曲线段的最小距离,通过比较这些最小距离值,找出点到平面NURBS曲线的最小距离。该算法实现简单,计算精度较高,具有重要的实用价值。

关键词: 平面NURBS曲线, 最小距离, 控制顶点投影法

Abstract: The projection method of control points for calculating the minimum distance between a point and a planar NURBS curve is proposed.The control points are projected onto NURBS curve,and the projection points subdivide NURBS curve into a set of curve segments.By calculating and comparing the minimum distances between a point and these curve segments,the minimum distance between a point and NURBS curve can be found.The algorithm has the property of simple realization,high calculation precision,so it has important practical value.

Key words: planar NURBS curve, minimum distance, projection method of control points