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拟三次Bezier曲线
引用本文:韩西安,马逸尘.拟三次Bezier曲线[J].装备指挥技术学院学报,2008,19(1):99-102.
作者姓名:韩西安  马逸尘
作者单位:[1]装备指挥技术学院基础部,北京101416 [2]西安交通大学理学院,陕西西安710049
基金项目:国家自然科学基金(10371096,10671153)
摘    要:给出了一组含有2个参数的多项式基函数,它是三次Bernstein基函数的扩展;基于该组基定义了带形状参数的多项式曲线,称之为拟三次Bezier(Q-Bezier)曲线。Q-Bezier曲线不仅具有三次Bezier曲线的特征,而且在控制多边形保持不变的条件下,具有形状可调性和对控制多边形更好的逼近性。形状参数具有明显的几何意义:控制曲线端点的性质。最后,给出了一些图形实例。

关 键 词:Q-Bezier曲线  三次BEZIER曲线  形状参数
文章编号:1673-0127(2008)01-0099-04
收稿时间:2006-11-27
修稿时间:2006年11月27

Cubic Quasi-Bezier Curve
Affiliation:HAN Xi'an,MA Yichen(1.Department of Basic Theories, the Academy of Equipment Command & Technology, Beijing 101416, China;2. School of Science, Xi'an Jiaotong University, Xi'an Shaanxi 710049, China)
Abstract:A class of polynomial basic function with two adjustable shape parameters is presented. It is an extension to classical cubic Bernstein basis function. A polynomial curve, called cubic Quasi- Bezier (Q-Bezier) curve with two shape parameters is defined based on it. The curve inherits the most properties of cubic Bezier curve and the shape of Q-Bezier curve can be adjusted by alerting the two shape parameters when the control polygon is maintained. The Q-Bezier curve can be more approximated to the control polygon. It is visible that the properties of end-point on Q-Bezier curve can be controlled by the two shape parameters. Finally, some examples are given by figures.
Keywords:Q-Bezier curve  cubic Bezier curve  shape parameters
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