<p><InlineEquation ID="IEq1"> <EquationSource Format="TEX">\(G^1\)</EquationSource> <EquationSource Format="MATHML"><math> <msup> <mi>G</mi> <mn>1</mn> </msup> </math></EquationSource> </InlineEquation> curves are visually smooth and aesthetic curves. They play an important role in the domain of computer-aided design (CAD) and 3D modeling. Interpolatory geometric subdivision schemes is a methodological approach for attaining these curves while mitigating undesirable artifacts. In this paper, we introduce a novel geometric interpolatory subdivision scheme, named the angle-based 6-point geometric scheme, designed for curves on surfaces of constant curvature (Euclidean, spherical, and hyperbolic). This proposed scheme incorporates a tension parameter. We show that the scheme converges if the tension parameter belongs to a specific interval, and yields <InlineEquation ID="IEq2"> <EquationSource Format="TEX">\(G^1\)</EquationSource> <EquationSource Format="MATHML"><math> <msup> <mi>G</mi> <mn>1</mn> </msup> </math></EquationSource> </InlineEquation>-continuous limit curves. This allows us to manipulate a whole family of curve subdivision schemes on constant curvature surfaces according to our needs. Numerical tests indicate the possibility of selecting the parameter within a well-defined range to achieve <InlineEquation ID="IEq3"> <EquationSource Format="TEX">\(G^2\)</EquationSource> <EquationSource Format="MATHML"><math> <msup> <mi>G</mi> <mn>2</mn> </msup> </math></EquationSource> </InlineEquation>-continuity across all three surface models. Experimental examples are presented to illustrate the convergence and <InlineEquation ID="IEq4"> <EquationSource Format="TEX">\(G^1\)</EquationSource> <EquationSource Format="MATHML"><math> <msup> <mi>G</mi> <mn>1</mn> </msup> </math></EquationSource> </InlineEquation> property of this scheme, accompanied by substantial applications showcasing its effectiveness.</p>

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A class of geometric curve subdivision schemes on surfaces of constant curvature

  • Taoufik Ahanchaou,
  • Mohamed Bellaihou,
  • Aziz Ikemakhen

摘要

\(G^1\) G 1 curves are visually smooth and aesthetic curves. They play an important role in the domain of computer-aided design (CAD) and 3D modeling. Interpolatory geometric subdivision schemes is a methodological approach for attaining these curves while mitigating undesirable artifacts. In this paper, we introduce a novel geometric interpolatory subdivision scheme, named the angle-based 6-point geometric scheme, designed for curves on surfaces of constant curvature (Euclidean, spherical, and hyperbolic). This proposed scheme incorporates a tension parameter. We show that the scheme converges if the tension parameter belongs to a specific interval, and yields \(G^1\) G 1 -continuous limit curves. This allows us to manipulate a whole family of curve subdivision schemes on constant curvature surfaces according to our needs. Numerical tests indicate the possibility of selecting the parameter within a well-defined range to achieve \(G^2\) G 2 -continuity across all three surface models. Experimental examples are presented to illustrate the convergence and \(G^1\) G 1 property of this scheme, accompanied by substantial applications showcasing its effectiveness.