inria-00604004, version 1
Triangulating Smooth Submanifolds with Light Scaffolding
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:
- 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
- http://hal.inria.fr/inria-00604004
- oai:hal.inria.fr:inria-00604004
- From:
- Submitted on: Monday, 27 June 2011 18:15:59
- Updated on: Tuesday, 28 June 2011 12:12:59





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