Visual
Computing
Computing
ACM Transactions on Graphics (Siggraph 2008)
We introduce a method for efficiently animating a wide range of deformable materials. We combine a high resolution surface mesh with a tetrahedral finite element simulator that makes use of frequent re-meshing. This combination allows for fast and detailed simulations of complex elastic and plastic behavior. We significantly expand the range of physical parameters that can be simulated with a single technique, and the results are free from common artifacts such as volume-loss, smoothing, popping, and the absence of thin features like strands and sheets. Our decision to couple a high resolution surface with low-resolution physics leads to efficient simulation and detailed surface features, and our approach to creating the tetrahedral mesh leads to an order-of-magnitude speedup over previous techniques in the time spent re-meshing. We compute masses, collisions, and surface tension forces on the scale of the fine mesh, which helps avoid visual artifacts due to the differing mesh resolutions. The result is a method that can simulate a large array of different material behaviors with high resolution features in a short amount of time.
@article{10.1145/1360612.1360646,
author = {Wojtan, Chris and Turk, Greg},
title = {Fast viscoelastic behavior with thin features},
year = {2008},
issue_date = {August 2008},
publisher = {Association for Computing Machinery},
address = {New York, NY, USA},
volume = {27},
number = {3},
issn = {0730-0301},
url = {https://doi.org/10.1145/1360612.1360646},
doi = {10.1145/1360612.1360646},
journal = {ACM Trans. Graph.},
month = aug,
pages = {1–8},
numpages = {8},
keywords = {computational fluid dynamics, deformable models, explicit surface, finite element method, free-form deformation, viscoelastic behavior}
}