FastLSM

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  • fast lattice shape matching for robust real-time deformation

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<jats:p> We introduce a simple technique that enables robust approximation of volumetric, large-deformation dynamics for real-time or large-scale offline simulations. We propose <jats:italic>Lattice Shape Matching</jats:italic> , an extension of deformable shape matching to regular lattices with embedded geometry; lattice vertices are smoothed by convolution of rigid shape matching operators on local lattice regions, with the effective mechanical stiffness specified by the amount of smoothing via region width. Since the naïve method can be very slow for stiff models - per-vertex costs scale cubically with region width - we provide a fast summation algorithm, <jats:italic>Fast Lattice Shape Matching (FastLSM)</jats:italic> , that exploits the inherent summation redundancy of shape matching and can provide large-region matching at constant per-vertex cost. With this approach, large lattices can be simulated in linear time. We present several examples and benchmarks of an efficient CPU implementation, including many dozens of soft bodies simulated at real-time rates on a typical desktop machine. </jats:p>

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