2023/03/21 by Otman Benchekroun, Jiayi Eris Zhang, Benchekroun, Otman +9 · 10 citations
Computer Science · Engineering · #3D Shape Modeling and Analysis #Computer Graphics and Visualization Techniques #FOS: Computer and information sciences #Graphics (cs.GR) #Human Motion and Animation #I.3.2 #I.3.5 #I.3.6 #I.3.7 #I.3.8
paper · pdf · doi:10.48550/arxiv.2303.11886
openalex publication_date 2023/03/21 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/01
We propose a reduced-space elasto-dynamic solver that is well suited for augmenting rigged character animations with secondary motion. At the core of our method is a novel deformation subspace based on Linear Blend Skinning that overcomes many of the shortcomings prior subspace methods face. Our skinning subspace is parameterized entirely by a set of scalar weights, which we can obtain through a small, material-aware and rig-sensitive generalized eigenvalue problem. The resulting subspace can easily capture rotational motion and guarantees that the resulting simulation is rotation equivariant. We further propose a simple local-global solver for linear co-rotational elasticity and propose a clustering method to aggregate per-tetrahedra non-linear energetic quantities. The result is a compact simulation that is fully decoupled from the complexity of the mesh.