Bolun Wang, Zachary Ferguson, Xin Jiang, Marco Attene, Daniele Panozzo, Teseo Schneider We introduce the first exact root parity counter for continuous collision detection (CCD). That is, our algorithm computes the parity (even or odd) of the number of roots of the cubic polynomial arising from a CCD query. We note that the parity is […]

Qisi Wang, Yutian Tao, Eric Brandt, Court Cutting, Eftychios Sifakis We present a method for the efficient processing of contact and collision in volumetric elastic models simulated using the Projective Dynamics paradigm. Our approach enables interactive simulation of tetrahedral meshes with more than half a million elements, provided that the model satisfies two fundamental properties: […]

Haozhe Su, Tao Xue, Chengguizi Han, Mridul Aanjaneya We present an arbitrary updated Lagrangian Material Point Method (A-ULMPM) to alleviate issues, such as the cell-crossing instability and numerical fracture, that plague state of the art Eulerian formulations of MPM, while still allowing for large deformations that arise in fluid simulations. Our proposed framework spans MPM […]

A-ULMPM: An Arbitrary Updated Lagrangian Material Point Method for Efficient Simulation of Solids and Fluids Coupling 3D Liquid with Simulation with 2D Wave Propagation for Large Scale Water Surface Animation using the Equivalent Sources Method Fast and Exact Root Parity for Continuous Collision Detection Mesh-Based Network for Quasi-Static Cloth Deformation Optimized Processing of Localized Collisions […]

Mianlun Zheng, Yi Zhou, Duygu Ceylan, Jernej Barbič Fast and light-weight methods for animating 3D characters are desirable in various applications such as computer games. We present a learning-based approach to enhance skinning-based animations of 3D characters with vivid secondary motion effects. We design a neural network that encodes each local patch of a character […]

Jing Li, Tiantian Liu, Ladislav Kavan We propose a fast and robust solver to simulate continuum-based deformable models with constraints, in particular, rigid-body and joint constraints useful for soft articulated characters. Our method embeds the degrees of freedom of both articulated rigid bodies and deformable bodies in one unified constrained optimization problem, thus coupling the […]

Happy new year 2022, Physics-Based Animation readers! Aside from the usual papers that appear here, I also maintain a page for tutorial resources and courses: http://www.physicsbasedanimation.com/resources-courses/ Since there have been quite a few nice new ones produced over the last 3-4 years, I thought I would highlight them with this post (including Matthias Mueller-Fischer’s YouTube […]

Bo Ren, Ben Xu, Chenfeng Li Porous materials are common in daily life. They include granular material (e.g. sand) that behaves like liquid flow when mixed with fluid and foam material (e.g. sponge) that deforms like solid when interacting with liquid. The underlying physics is further complicated when multiple fluids interact with porous materials involving […]

Yue Chang, Shusen Liu, Xiaowei He, Sheng Li, Guoping Wang The treatment of solid boundary conditions remains one of the most challenging parts in the SPH method. We present a semi-analytical approach to handle complex solid boundaries of arbitrary shape. Instead of calculating a renormalizing factor for the particle near the boundary, we propose to […]

Chengguizi Han*, Tao Xue*, Mridul Aanjaneya We propose a Lagrangian particle-based formulation for simulating deformation, fracture, and diffusion in thin membrane-like structures, such as aluminium foil, rubbery films, and seaweed flakes. We integrate our model with diffusion processes and derive a unified framework for simulating deformation-diffusion coupled phenomena, which is applied to provide realistic heterogeneity […]