Uniform trigonometric polynomial B-spline curves. (English) Zbl 1185.41008

Lü, Yonggang; Wang, Guozhao; Yang, Xunnian

Sci. China, Ser. F 45, No. 5, 335-343 (2002).

Summary: This paper presents a new kind of uniform spline curve, named trigonometric polynomial B-splines, over space \(\Omega = \text{span}\{\text{sin }t, \text{cost},t^{k-3},t^{k-4}, \dots,t, 1\}\) of which \(k\) is an arbitrary integer larger than or equal to 3. We show that trigonometric polynomial B-spline curves have many similar properties to traditional B-splines. Based on the explicit representation of the curve we have also presented the subdivision formulae for this new kind of curve. Since the new spline can include both polynomial curves and trigonometric curves as special cases without rational form, it can be used as an efficient new model for geometric design in the fields of CAD/CAM.

MSC:

41A15	Spline approximation
42A10	Trigonometric approximation

Keywords:

C-curves; uniform B-splines; C-B-splines; trigonometric polynomial B-splines

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