A Skinned Tetrahedral Mesh for Hair Animation and Hair-Water Interaction

Minjae Lee, David Hyde, Michael Bao, Ronald Fedkiw We propose a novel framework for hair animation as well as hair-water interaction that supports millions of hairs. First, we develop a hair animation framework that embeds hair into a tetrahedralized volume mesh that we kinematically skin to deform and follow the exterior of an animated character. […]

Posted by christopherbatty on February 24th, 2018 | Comments Off on A Skinned Tetrahedral Mesh for Hair Animation and Hair-Water Interaction Posted in Deformables, Fluids, Hair/Rods/Rope

Exponential Rosenbrock-Euler Integrators for Elastodynamic Simulation

Yu Ju Chen, Uri M. Ascher, Dinesh K. Pai High quality simulations of the dynamics of soft flexible objects can be rather costly, because the assembly of internal forces through an often nonlinear stiffness at each time step is expensive. Many standard implicit integrators introduce significant, time-step dependent artificial damping. Here we propose and demonstrate […]

Posted by christopherbatty on February 22nd, 2018 | Comments Off on Exponential Rosenbrock-Euler Integrators for Elastodynamic Simulation Posted in Deformables

Efficient BVH-based Collision Detection Scheme with Ordering and Restructuring

X. L. Wang, M. Tang, D. Manocha, Ruo-Feng Tong Bounding volume hierarchy (BVH) has been widely adopted as the acceleration structure in broad-phase collision detection. Previous state-of-the-art BVH-based collision detection approaches exploited the spatio-temporal coherence of simulations by maintaining a bounding volume test tree (BVTT) front. A major drawback of these algorithms is that large […]

Posted by christopherbatty on February 16th, 2018 | Comments Off on Efficient BVH-based Collision Detection Scheme with Ordering and Restructuring Posted in Collisions

Stabilizing Integrators for Real-Time Physics

Dimitar Dinev, Tiantian Liu, Ladislav Kavan We present a new time integration method featuring excellent stability and energy conservation properties, making it particularly suitable for real-time physics. The commonly used backward Euler method is stable but introduces artificial damping. Methods such as implicit midpoint do not suffer from artificial damping but are unstable in many […]

Posted by christopherbatty on February 7th, 2018 | Comments Off on Stabilizing Integrators for Real-Time Physics Posted in Cloth, Deformables

Fast Fluid Simulations with Sparse Volumes on the GPU

Kui Wu, Nghia Truong, Cem Yuksel, Rama Hoetzlein We introduce efficient, large scale fluid simulation on GPU hardware using the fluid-implicit particle (FLIP) method over a sparse hierarchy of grids represented in NVIDIA GVDB Voxels. Our approach handles tens of millions of particles within a virtually unbounded simulation domain. We describe novel techniques for parallel […]

Posted by christopherbatty on February 1st, 2018 | Comments Off on Fast Fluid Simulations with Sparse Volumes on the GPU Posted in Fluids