Papers › Approximating Surfaces in R³ by Meshes with Guaranteed Regularity

Approximating Surfaces in R³ by Meshes with Guaranteed Regularity

24 Jan 2020arXiv:2001.09081links table onlyarchive 2025-07-28

Joel Hass, Maria Trnkova

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We study the problem of approximating a surface F in R³ by a high quality mesh, a piecewise-flat triangulated surface whose triangles are as close as possible to equilateral. The MidNormal algorithm generates a triangular mesh that is guaranteed to have angles in the interval [49.1ᵒ, 81.8ᵒ]. As the mesh size e→0, the mesh converges pointwise to F through surfaces that are isotopic to F. The GradNormal algorithm gives a piecewise-C¹ approximation of F, with angles in the interval [35.2ᵒ, 101.5ᵒ] as e→0. Previously achieved angle bounds were in the interval [30ᵒ, 120ᵒ].

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