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Micropolar Elasticity in Physically-Based Animation
(ACM Association for Computing Machinery, 2023)
We explore micropolar materials for the simulation of volumetric deformable solids. In graphics, micropolar models have only been used in the form of one-dimensional Cosserat rods, where a rotating frame is attached to ...
MAAIP: Multi-Agent Adversarial Interaction Priors for imitation from fighting demonstrations for physics-based characters
(ACM Association for Computing Machinery, 2023)
Simulating realistic interaction and motions for physics-based characters is of great interest for interactive applications, and automatic secondary character animation in the movie and video game industries. Recent works ...
HDHumans: A Hybrid Approach for High-fidelity Digital Humans
(ACM Association for Computing Machinery, 2023)
Photo-real digital human avatars are of enormous importance in graphics, as they enable immersive communication over the globe, improve gaming and entertainment experiences, and can be particularly beneficial for AR and ...
Physics-based Motion Retargeting from Sparse Inputs
(ACM Association for Computing Machinery, 2023)
Avatars are important to create interactive and immersive experiences in virtual worlds. One challenge in animating these characters to mimic a user’s motion is that commercial AR/VR products consist only of a headset and ...
Towards Realtime: A Hybrid Physics-based Method for Hair Animation on GPU
(ACM Association for Computing Machinery, 2023)
This paper introduces a hair simulator optimized for real-time applications, including console and cloud gaming, avatar live-streaming, and metaverse environments. We view the collisions between strands as a mechanism to ...
A Multilevel Active-Set Preconditioner for Box-Constrained Pressure Poisson Solvers
(ACM Association for Computing Machinery, 2023)
Efficiently solving large-scale box-constrained convex quadratic programs (QPs) is an important computational challenge in physical simulation.We propose a new multilevel preconditioning scheme based on the active-set ...
Adaptive Rigidification of Discrete Shells
(ACM Association for Computing Machinery, 2023)
We present a method to improve the computation time of thin shell simulations by using adaptive rigidification to reduce the number of degrees of freedom. Our method uses a discretization independent metric for bending ...
A Unified Analysis of Penalty-Based Collision Energies
(ACM Association for Computing Machinery, 2023)
We analyze a wide class of penalty energies used for contact response through the lens of a reduced frame. Applying our analysis to both spring-based and barrier-based energies, we show that we can obtain closedform, ...
NeuroDog: Quadruped Embodiment using Neural Networks
(ACM Association for Computing Machinery, 2023)
Virtual reality (VR) allows us to immerse ourselves in alternative worlds in which we can embody avatars to take on new identities. Usually, these avatars are humanoid or possess very strong anthropomorphic qualities. ...
A Linear and Angular Momentum Conserving Hybrid Particle/Grid Iteration for Volumetric Elastic Contact
(ACM Association for Computing Machinery, 2023)
We present a momentum conserving hybrid particle/grid iteration for resolving volumetric elastic collision. Our hybrid method uses implicit time stepping with a Lagrangian finite element discretization of the volumetric ...