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Pythagorean-Hodograph C-曲线
Pythagorean-Hodograph C-Curve
【摘要】 给出了Pythagorean-hodograph(PH) C-曲线的定义、平面四阶C-曲线是PH曲线的充分必要条件及平面四阶PHC-Bézier曲线的几何构造方法.最后证明了高于四阶的平面PHC-曲线只能是直线或者多项式PH曲线.
【Abstract】 The definition of Pythagorean-hodograph C-curve is given and a necessary and sufficient condition for a fourth-order plane C-curve to be a PH C-curve is obtained.A new geometric construction approach of fourth-order PH C-Bézier curves is also proposed.Finally,it is proved that higher order(>4)PH C-curves are either straight lines or polynomial PH curves.
【关键词】 Pythagorean-hodograph(PH);
C-曲线;
C-Bézier;
【Key words】 Pythagorean-hodograph(PH); C-curve; C-Bézier;
【Key words】 Pythagorean-hodograph(PH); C-curve; C-Bézier;
【基金】 国家自然科学基金(60473130);国家“九七三”重点基础研究发展规划项目(2004CB31800)
- 【文献出处】 计算机辅助设计与图形学学报 ,Journal of Computer-Aided Design & Computer Graphics , 编辑部邮箱 ,2007年07期
- 【分类号】TP391.4
- 【被引频次】6
- 【下载频次】175