Physics-Based Simulation

Dynamic GPU Sparse Grids and Voxel-sequential Processing in NanoVDB

We introduce two fundamental advances to the NanoVDB data structure: dynamic GPU-native topological updates, and a voxel-sequential access paradigm that dramatically accelerates point-wise and stencil-based operators on sparse grids. NanoVDB's …

Machine Learning Operator Lexicon for Partial Differential Equation Solvers on Irregular and Sparse Domains

Solvers for grid-based discretizations of Partial Differential Equations (PDEs) are ubiquitous in computer graphics. However, efficient implementation of such solvers is contingent on specific design choices for grid data structures (especially for …

Stochastic Barnes-Hut Approximation for Fast Summation on the GPU

We present a novel stochastic version of the Barnes-Hut approximation. Regarding the level-of-detail (LOD) family of approximations as control variates, we construct an unbiased estimator of the kernel sum being approximated. Through several examples …

Near-realtime Facial Animation by Deep 3D Simulation Super-Resolution

We present a neural network-based simulation super-resolution framework that can efficiently and realistically enhance a facial performance produced by a low-cost, real-time physics-based simulation to a level of detail that closely approximates that …