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Meshless methods for physics-based modeling and simulation of deformable models

Science in China(Series F) 2009年第3期52卷 401-417页

作者： GUO XiaoHu QIN Hong Department of Computer Science University of Texas at Dallas Richardson Texas 75083-0688 USA Department of Computer Science Stony Brook University Stony Brook New York 11794-4400 USA

As 3D digital photographic and scanning devices produce higher resolution images, acquired geometric data sets grow more complex in terms of the modeled objects＇ size, geometry, and topology. As a consequence, point-sampled geometry is becoming ubiquitous in graphics and geometric information processing, and poses new challenges which have not been fully resolved by the state-of-art graphical techniques. In this paper, we address the challenges by proposing a meshless computational framework for dynamic modeling and simulation of solids and thin-shells represented as point sam- ples. Our meshless framework can directly compute the elastic deformation and fracture propagation for any scanned point geometry, without the need of converting them to polygonal meshes or higher order spline representations. We address the necessary computational techniques, such as Moving Least Squares, Hierarchical Discretization, and Modal Warping, to effectively and efficiently compute the physical simulation in real-time. This meahless computational framework aims to bridge the gap between the point-sampled geometry with physics-based modeling and simulation governed by partial differential equations.

关键词： meshless method physics-based modeling physics-based simulation deformable models

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Surface Reconstruction Techniques for Imperfect Raw-data

Surface Reconstruction Techniques for Imperfect Raw-data

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2009 11th IEEE International Conference on Computer-Aided Design and Computer Graphics(IEEE CAD/Graphics 2009)

作者： Daniel Cohen-Or School of Computer Science Tel Aviv University Israel

In my talk I will present some surface reconstruction techniques that handle imperfect *** data is common in raw scans and contains large missing parts,ghost outliers and under-sampled *** explore reconstruction techniques that focus on such problematic *** general goal is recovering the expected shape in terms of global topology and local geometric detail.

关键词： Surface reconstruction Wires Topology Shape Performance analysis Computer science deformable models Reconstruction algorithms Noise reduction

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