Example-Based Expressive Animation of 2D Rigid Bodies

Marek Dvorožňák, Pierre Bénard, Pascal Barla, Oliver Wang, Daniel Sýkora We present a novel approach to facilitate the creation of stylized 2D rigid body animations. Our approach can handle multiple rigid objects following complex physically-simulated trajectories with collisions, while retaining a unique artistic style directly specified by the user. Starting with an existing target animation […]

Power Diagrams and Sparse Paged Grids for High Resolution Adaptive Liquids

Mridul Aanjaneya, Ming Gao, Haixiang Liu, Christopher Batty and Eftychios Sifakis We present an efficient and scalable octree-inspired fluid simulation framework with the flexibility to leverage adaptivity in any part of the computational domain, even when resolution transitions reach the free surface. Our methodology ensures symmetry, definiteness and second order accuracy of the discrete Poisson […]

Variational Stokes: A Unified Pressure-Viscosity Solver for Accurate Viscous Liquids

Egor Larionov, Christopher Batty, Robert Bridson We propose a novel unsteady Stokes solver for coupled viscous and pressure forces in grid-based liquid animation which yields greater accuracy and visual realism than previously achieved. Modern fluid simulators treat viscosity and pressure in separate solver stages, which reduces accuracy and yields incorrect free surface behavior. Our proposed […]

A Multi-Scale Model for Simulating Liquid-Hair Interactions

Yun (Raymond) Fei, Henrique Teles Maia, Christopher Batty, Changxi Zheng, Eitan Grinspun The diverse interactions between hair and liquid are complex and span multiple length scales, yet are central to the appearance of humans and animals in many situations. We therefore propose a novel multi-component simulation framework that treats many of the key physical mechanisms […]

Real-time Interactive Tree Animation

We present a novel method for posing and animating botanical tree models interactively in real time. Unlike other state of the art methods which tend to produce trees that are overly flexible, bending and deforming as if they were underwater plants, our approach allows for arbitrarily high stiffness while still maintaining real-time frame rates without […]

Approximate Air-Fluid Interactions for SPH

Christoph Gissler, Stefan Band, Andreas Peer, Markus Ihmsen, Matthias Teschner Computing the forces acting from a surrounding air phase onto an SPH free-surface fluid is challenging. For full multiphase simulations the computational overhead is significant and stability issues due to the high density ratio may arise. In contrast, the air-fluid interactions can be approximated efficiently […]

Moving Least Squares Boundaries for SPH Fluids

Stefan Band, Christoph Gissler, Matthias Teschner The paper shows that the SPH boundary handling of Akinci et al. [AIA∗ 12] suffers from perceivable issues in planar regions due to deviations in the computed boundary normals and due to erroneous oscillations in the distance computation of fluid particles to the boundary. In order to resolve these […]

Prescribed Velocity Gradients for Highly Viscous SPH Fluids with Vorticity Diffusion

Andreas Peer, Matthias Teschner Working with prescribed velocity gradients is a promising approach to efficiently and robustly simulate highly viscous SPH fluids. Such approaches allow to explicitly and independently process shear rate, spin, and expansion rate. This can be used to, e.g., avoid interferences between pressure and viscosity solvers. Another interesting aspect is the possibility […]


Variational Stokes: A Unified Pressure-Viscosity Solver for Accurate Viscous Liquids Power Diagrams and Sparse Paged Grids for High Resolution Adaptive Liquids A Multi-Scale Model for Simulating Liquid-Hair Interactions A Stiffly Accurate Integrator for Elastodynamic Problems Example-Based Damping Design Robust eXtended Finite Elements for Complex Cutting of Deformables Perceptual Evaluation of Liquid Simulation Methods Data-Driven Synthesis […]