用四次有理Bézier曲线表示圆弧与圆

Quartic Rational Bézier Curve Representation of Arc and Circle

提出了一种实用的四次有理Ｂｅｚｉｅｒ曲线表示圆弧及整圆的方法，并得到了各种情况下现成的可用结果．文中所述的方法统一旦简单，符合对圆弧有理Ｂｚｉｅｒ曲线表示的要求．

This paper presents a method for quartic rational Bezier curve representation of arc and circle, and pots forward ready-made results different circumstance.The method described in this paper is simple and consistent, and meets the demands of arc rational Bezier curve representation.