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两种带形状参数的三角曲线

  

  • 出版日期:2012-02-24 发布日期:2015-06-19

Two kinds of trigonometric curves with shape parameters

  • Online:2012-02-24 Published:2015-06-19

摘要: 定义了带形状参数的三次三角多项式曲线和三次三角样条曲线。前者具有
与二次Bézier 曲线类似的端点性质,但逼近性比二次Bézier 曲线更好,且在拼接时能达到
更高阶的连续性。而后者与二次B 样条曲线类似,其每一段由相继的三个控制顶点生成。
对于等距节点,在一般情况下曲线C2 连续,在特殊条件下可达C3 连续。

关键词: 计算机应用, 三角基, 样条曲线, 形状参数

Abstract: Two kinds of trigonometric curves with shape parameters are defined, they are
trigonometric polynomial curves and cubic trigonometric spline curves. The former retains the
main properties of the quadratic Bézier curve, and it is closer to the control polygon and can
achieve higher order of continuity than the quadratic Bézier curve. The latter is similar to the
quadratic B-spline curve, each piece of it is generated by three consecutive control points. For
equidistant knots, the curves are C2 continuous, and they are C3 continuous under special
conditions.

Key words: computer application, trigonometric basis, spline curve, shape parameter