4.7 Article

Automatic and high-quality surface mesh generation for CAD models

Journal

COMPUTER-AIDED DESIGN
Volume 109, Issue -, Pages 49-59

Publisher

ELSEVIER SCI LTD
DOI: 10.1016/j.cad.2018.12.005

Keywords

CAD tessellation; High-quality mesh; Remeshing

Funding

  1. National Natural Science Foundation of China [61802406, 61872354, 61772523, 61620106003]
  2. Beijing Natural Science Foundation, China [4184102]
  3. Open Funding Project of State Key Laboratory of Virtual Reality Technology and Systems of Beihang University, China [BUAA-VR-17KF-06]
  4. Open Projects Program of National Laboratory of Pattern Recognition (NLPR), China [201700020]

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In this paper, we present a fully automatic framework that tessellates industrial computer-aided design (CAD) models into high-quality triangular meshes. In contrast to previous approaches that are purely parametric or performed directly in 3D space, our method is based on a remeshing algorithm that can achieve accuracy and high-quality simultaneously. Given an input standard CAD model, which is represented by B-rep format, we first rebuild the parametric domain for each surface patch according to an initial triangulation, and then the boundaries of the parametric domain are retriangulated by exploiting the Constrained Delaunay Triangulation (CDT). In the second stage, the 2D triangulation is projected back to the 3D space, and a modified global isotropic remeshing process is applied, which further improves the regularity and angle quality of the tessellated meshes. Experiments demonstrate the validity of the proposed approach and its ability to generate high-quality meshes. Moreover, we evaluate our technique and compare it with state-of-the-art CAD model tessellation approaches. (C) 2018 Elsevier Ltd. All rights reserved.

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