AHT Bézier curves and NUAHT B-spline curves

Authors:
Gang Xu;Guo-Zhao Wang
Affiliations:
Institute of Computer Graphics and Image Processing, Zhejiang University, Hangzhou, China and Department of Mathematics, Zhejiang University, Hangzhou, China;Institute of Computer Graphics and Image Processing, Zhejiang University, Hangzhou, China and Department of Mathematics, Zhejiang University, Hangzhou, China
Venue:
Journal of Computer Science and Technology
Year:
2007

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Abstract

In this paper, we present two new unified mathematics models of conics and polynomial curves, called algebraic hyperbolic trigonometric (AHT) Bézier curves and non-uniform algebraic hyperbolic trigonometric (NUAHT) B-spline curves of order n, which are generated over the space span{sin t, cos t, sinh t, cosh t, 1, t,..., tn-5}, n ≥ 5. The two kinds of curves share most of the properties as those of the Bézier curves and B-spline curves in polynomial space. In particular, they can represent exactly some remarkable transcendental curves such as the helix, the cycloid and the catenary. The subdivision formulae of these new kinds of curves are also given. The generations of the tensor product surfaces are straightforward. Using the new mathematics models, we present the control mesh representations of two classes of minimal surfaces.