
We introduce a new collision proxy for examplebased deformable bodies. Specifically, we approximate the deforming geometry as a union of spheres. During precomputation we perform a sphere packing on the input, undeformed geometry. Then, for each example pose, we move and resize the spheres to approximate the example. During runtime we blend together these positions and radii, using the same skinning weights we use for the geometry. We demonstrate the method on a car crash example, where we achieve an overall speedup of 520 times, depending on the resolution of the collision proxy geometry.
Ben Jones, Joshua A. Levine, Tamar Shinar, and Adam W. Bargteil
"Efficient Collision Detection for Examplebased Deformable Bodies."
ACM SIGGRAPH Conference on Motion in Games 2017
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