NURBS曲线的一种快速修正算法  

Quick Modifying Method of NURBS Curve

作　　者：苏翃[1] 林意[2] 邱利琼[1] 邱敦元[1] 

机构地区：[1]重庆工学院数理学院,重庆400050 [2]江南大学信息工程学院,无锡214036

出　　处：《重庆大学学报（自然科学版）》2007年第4期118-120,共3页Journal of Chongqing University

基　　金：重庆市教委科技计划基金资助项目(KJ050611)

摘　　要：一种明显的、容易被工程人员接受的修改NURBS曲线的方法是通过移动型值点来修改曲线.目前大多CAD软件中都有这一模块,但其中每一微小的局部变化,都必须将整个曲线重新计算,当曲线形状复杂或尺寸很大,定义曲线的数据很多时,这个修改过程会很费时,并且不具备局部修改性质.本文提出一种方法,修改型值点时,只有四段曲线随之发生变化,有极好的局部性,运行速度也快,可以在CAD软件中应用.Although there are modifying modules in the most CAD software, the parameters of entire curve must be computed again as the tiny local curve changed. The modification are not local and spending long time and difficult as the eurve is complex or large. A method can be applied to engineering designer easily has been proposed. There are only four segments have been ehanged along with the moving of a given point, and the speed is fast. It ean be used to CAD software and generalize the method to surface easily.

关 键 词：NURBS 型值点 控制点 

分 类 号：TP391.72[自动化与计算机技术—计算机应用技术]