Preprint A681/2010
Geodesic conic subdivision curves on surfaces
Nayla Lopez-Gil | Estrada-Sarlabous, Jorge | Hernandez-Mederos, Victoria | Mart?nez-Morera, Dimas | Velho, Luiz
Keywords: subdivision
In this paper we present a nonlinear curve subdivision scheme, suitable for designing curves on surfaces. The scheme is inspired in the concept of geodesic Bezier curves. Starting with a geodesic control polygon with ver- tices on a surface S, the scheme generates a sequence of geodesic polygons that converges to a continuous curve on S. In the planar case, the limit curve is a conic B ́ezier spline curve. Each section of the subdivision curve, corresponding to three consecutive points of the control polygon, depends on a free parameter which can can be used to obtain a local control of the shape of the curve. Furthermore, it has the convex hull property. Results are extended to triangulated surfaces showing that the scheme is suitable for designing curves on these surfaces.