Author Archives: christopherbatty

We present a practical approach to isotropic tetrahedral meshing of 3D domains bounded by piecewise smooth surfaces. Building upon recent theoretical and practical advances, our algorithm interleaves Delaunay refinement and mesh optimization to generate quality meshes that satisfy a set … Continue reading →

We develop a method for reliable simulation of elastica in complex contact scenarios. Our focus is on firmly establishing three parameter-independent guarantees: that simulations of well-posed problems (a) have no interpenetrations, (b) obey causality, momentum- and energy-conservation laws, and (c) … Continue reading →

This paper introduces a data-driven representation and modeling technique for simulating non-linear heterogeneous soft tissue. It simplifies the construction of convincing deformable models by avoiding complex selection and tuning of physical material parameters, yet retaining the richness of non-linear heterogeneous … Continue reading →

It’s that time of year again… Here’s the link to Ke-Sen’s more complete list. Physics-related papers: Energy-Preserving Integrators for Fluid Animation Interactive Simulation of Surgical Needle Insertion and Steering Modular Bases for Fluid Dynamics Numerical Coarsening of Inhomogeneous Elastic Materials … Continue reading →

We present a method for simulating highly detailed cutting and fracturing of thin shells using low-resolution simulation meshes. Instead of refining or remeshing the underlying simulation domain to resolve complex cut paths, we adapt the extended finite element method (XFEM) … Continue reading →

We present a novel, incompressible fluid simulation method based on the Lagrangian Smoothed Particle Hydrodynamics (SPH) model. In our method, incompressibility is enforced by using a prediction-correction scheme to determine the particle pressures. For this, the information about density fluctuations … Continue reading →

We present a new approach to fluid simulation that balances the speed of model reduction with the flexibility of grid-based methods. We construct a set of composable reduced models, or tiles, which capture spatially localized fluid behavior. We then precompute … Continue reading →

We present algorithms for simulating and visualizing the insertion and steering of needles through deformable tissues for surgical training and planning. Needle insertion is an essential component of manyclinical procedures such as biopsies, injections, neurosurgery, and brachytherapy cancer treatment. The … Continue reading →

We present a method for accurately tracking the moving surface of deformable materials in a manner that gracefully handles topological changes.We employ a Lagrangian surface tracking method, and we use a triangle mesh for our surface representation so that fine … Continue reading →

Keyframe animation is a common technique to generate animations of deformable characters and other soft bodies. With spline interpolation, however, it can be difficult to achieve secondary motion effects such as plausible dynamics when there are thousands of degrees of … Continue reading →