摘要
本文根据产生曲线的特征点与它的等距线的特征点的对应关系,给出了一种平面NURBS曲线的等距线表示方法——圆弧法矢近似法。这种方法的特点是:(1)等距线与产生曲线具有统一的NURBS表示;(2)计算简单、几何意义明确、近似精度高。
On the basis of the one- to-one correspondence of the characteristic points of the offset curve from a given generator curve with those of the generator, this paper presents the arc-normal vector approximation of offset curves of plane NURBS curves. This method has the following advantages: (1) The offset curve and its generator have a united NURBS representation; (2) Its computation is simple,geometric property is apparant and approximating precision is high.
出处
《计算机辅助设计与图形学学报》
EI
CSCD
1993年第2期95-101,共7页
Journal of Computer-Aided Design & Computer Graphics
基金
航空科学基金
关键词
NURBS
曲线
等距线
NURBS, curve , primitive segment, characteristic point, offset curve.
