Variationally improved Bézier surfaces with shifted knots
type: Item
instance of: scholarly article
title: Variationally improved Bézier surfaces with shifted knots
DOI: 10.1155/2021/9978633
author: Daud Ahmad
author: Kanwal Hassan
author: M. Khalid Mahmood
author: Javaid Ali
author: Ilyas Khan
author: M. Fayz-Al-Asad
published in: Advances in Mathematical Physics
publication date: 2021-11-25T00:00:00Z
review text: Summary: The Plateau-Bézier problem with shifted knots is to find the surface of minimal area amongst all the Bézier surfaces with shifted knots spanned by the admitted boundary. Instead of variational minimization of usual area functional, the quasi-minimal Bézier surface with shifted knots is obtained as the solution of variational minimization of Dirichlet functional that turns up as the sum of two integrals and the vanishing condition gives us the system of linear algebraic constraints on the control points. The coefficients of these control points bear symmetry for the pair of summation indices as well as for the pair of free indices. These linear constraints are then solved for unknown interior control points in terms of given boundary control points to get quasi-minimal Bézier surface with shifted knots. The functional gradient of the surface gives possible candidate functions as the minimizers of the aforementioned Dirichlet functional; when solved for unknown interior control points, it results in a surface of minimal area called quasi-minimal Bézier surface. In particular, it is implemented on a biquadratic Bézier surface by expressing the unknown control point \(P_{11}\) as the linear combination of the known control points in this case. This can be implemented to Bézier surfaces with shifted knots of higher degree, as well if desired.
Mathematics Subject Classification ID: 65-XX
Mathematics Subject Classification ID: 49-XX
zbMATH DE Number: 7433525
MaRDI profile type: Publication
full work available at URL: https://doi.org/10.1155/2021/9978633
OpenAlex ID: W3193697283
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description: scientific article; zbMATH DE number 7433525