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inria-00604004, version 1

Triangulating Smooth Submanifolds with Light Scaffolding

Jean-Daniel Boissonnat () 1, Arijit Ghosh () 1

N° RR-7660 (2011)

Abstract: We propose an algorithm to sample and mesh a k-submanifold M of positive reach embedded in Rd. The algorithm first constructs a crude sample of M. It then refines the sample according to a prescribed parameter ε, and builds a mesh that approximates M. Differently from most algorithms that have been developped for meshing surfaces of R^3, the refinement phase does not rely on a subdivision of Rd (such as a grid or a triangulation of the sample points) since the size of such scaffoldings depends exponentially on the ambient dimension d. Instead, we only compute local stars consisting of k-dimensional simplices around each sample point. By refining the sample, we can ensure that all stars become coherent leading to a k-dimensional triangulated manifold Mˆ . The algorithm uses only simple numerical operations. We show that the size of the sample is O(ε^(−k)) and that Mˆ is a good triangulation of M. More specifically, we show that M and Mˆ are isotopic, that their Hausdorff distance is O(ε^2) and that the maximum angle between their tangent bundles is O(ε). The asymptotic complexity of the algorithm is T (ε) = O(ε^(−k^2 −k) ) (for fixed M, d and k).

  • 1:  GEOMETRICA (INRIA Sophia Antipolis / INRIA Saclay - Ile de France)
  • INRIA
  • Domain : Computer Science/Computational Geometry
  • Keywords : Manifold triangulation – meshing – manifold learning – manifold sampling – computational geometry – computational topology
  • Internal note : RR-7660
 
  • inria-00604004, version 1
  • oai:hal.inria.fr:inria-00604004
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  • Submitted on: Monday, 27 June 2011 18:15:59
  • Updated on: Tuesday, 28 June 2011 12:12:59