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- W2963145016 abstract "A generalization of vector fields, referred to as $N$-direction fields or cross fields when $N = 4$, has been recently introduced and studied for geometry processing, with applications in quadrilateral (quad) meshing, texture mapping, and parameterization. We make the observation that cross field design for two-dimensional quad meshing is related to the well-known Ginzburg--Landau problem from mathematical physics. This yields a variety of theoretical tools for efficiently computing boundary-aligned quad meshes, with provable guarantees on the resulting mesh, such as the number of mesh defects and bounds on the defect locations. The procedure for generating the quad mesh is to (i) find a complex-valued “representation” field that minimizes the Ginzburg--Landau energy subject to a boundary constraint, (ii) convert the representation field into a boundary-aligned, smooth cross field, (iii) use separatrices of the cross field to partition the domain into four-sided regions, and (iv) mesh each of these four-sided regions using standard techniques. Leveraging the Ginzburg--Landau theory, we prove that this procedure can be used to produce a cross field whose separatrices partition the domain into four-sided regions. To minimize the Ginzburg--Landau energy for the representation field, we use an extension of the Merriman--Bence--Osher threshold dynamics method, originally conceived as an algorithm to simulate mean curvature flow. Finally, we demonstrate the method on a variety of test domains." @default.
- W2963145016 created "2019-07-30" @default.
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- W2963145016 date "2019-01-01" @default.
- W2963145016 modified "2023-10-18" @default.
- W2963145016 title "An Approach to Quad Meshing Based on Harmonic Cross-Valued Maps and the Ginzburg--Landau Theory" @default.
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- W2963145016 doi "https://doi.org/10.1137/17m1142703" @default.
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