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Stable Neo-Hookean Flesh Simulation Breannan Smith, Fernando de Goes, Theodore Kim December 2017 Non-linear hyperelastic energies play a key role in capturing the fleshy appearance of virtual characters. Real-world, volume-preserving biological tissues have Poisson's ratios near 1/2, but numerical simulation within this regime is notoriously challenging. In order to robustly capture these visual characteristics, we present a novel version of Neo-Hookean elasticity. Our ... more Paper (PDF) Video Additional materials: [snh_code.tar.bz2], [stable_neo_hookean_supplement.pdf] Errata: The expression for alpha on the last line of Page 4 contained a typo that we have fixed. |
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Analytic Eigensystems for Isotropic Distortion Energies Breannan Smith, Fernando de Goes, Theodore Kim September 2018 Many strategies exist for optimizing non-linear distortion energies in geometry and physics applications, but devising an approach that achieves the convergence promised by Newton-type methods remains challenging. In order to guarantee the positive semi-definiteness required by these methods, a numerical eigendecomposition or approximate regularization is usually needed. In this paper, ... more Paper (PDF) Additional materials: [Matlab.zip], [movie.mov], [supplement.pdf] |