Real-Time Dynamic Fracture with Volumetric Approximate Convex Decompositions

Matthias Mueller, Nuttapong Chentanez, Tae-Yong Kim We propose a new fast, robust and controllable method to simulate the dynamic destruction of large and complex objects in real time. The common method for fracture simulation in computer games is to pre-fracture models and replace objects by their pre-computed parts at run-time. This popular method is computationally […]

Posted by christopherbatty on April 23rd, 2013 | Comments Off on Real-Time Dynamic Fracture with Volumetric Approximate Convex Decompositions Posted in Fracture, Rigid bodies

Geometric Numerical Integration of Inequality Constrained Nonsmooth Hamiltonian Systems

Danny Kaufman, Dinesh Pai We consider the geometric numerical integration of Hamiltonian systems subject to both equality and “hard” inequality constraints. As in the standard geometric integration setting, we target long-term structure preservation. Additionally, however, we also consider invariant preservation over persistent, simultaneous, and/or frequent boundary interactions. Appropriately formulating geometric methods for these cases has […]

Posted by christopherbatty on October 18th, 2012 | Comments Off on Geometric Numerical Integration of Inequality Constrained Nonsmooth Hamiltonian Systems Posted in Collisions, Deformables, Rigid bodies

Interpenetration Free Simulation of Thin Shell Rigid Bodies

R. Elliot English, Michael Lentine, Ron Fedkiw We propose a new algorithm for rigid body simulation that guarantees each body is in an interpenetration free state, both increasing the accuracy and robustness of the simulation as well as alleviating the need for ad hoc methods to separate bodies for subsequent simulation and rendering. We cleanly separate collision […]

Posted by christopherbatty on October 13th, 2012 | Comments Off on Interpenetration Free Simulation of Thin Shell Rigid Bodies Posted in Collisions, Rigid bodies, Shells

Automated Constraint Placement to Maintain Pile Shape

Shu-Wei Hsu, John Keyser We present a simulation control to support art-directable stacking designs by automatically adding constraints to stabilize the stacking structure. We begin by adapting equilibrium analysis in a local scheme to find “stable” objects of the stacking structure. Next, for stabilizing the structure, we pick suitable objects from those passing the  equilibrium analysis and then […]

Posted by christopherbatty on September 30th, 2012 | Comments Off on Automated Constraint Placement to Maintain Pile Shape Posted in Rigid bodies

Efficient Collision Detection for Brittle Fracture

Loiez Glondu, Sarah Schvartzman, Maud Marchal, Georges Dumon, Miguel Otaduy In complex scenes with many objects, collision detection plays a key role in the simulation performance. This is particularly true for fracture simulation, where multiple new objects are dynamically created. In this paper, we present novel algorithms and data structures for collision detection in real-time […]

Posted by christopherbatty on July 29th, 2012 | Comments Off on Efficient Collision Detection for Brittle Fracture Posted in Fracture, Rigid bodies

Mass-Splitting for Jitter-Free Parallel Rigid Body Simulation

Richard Tonge, Feodor Benevolenski, Andrey Voroshilov We present a parallel iterative rigid body solver that avoids common artifacts at low iteration counts. In large or real-time simulations, iteration is often terminated before convergence to maximize scene size. If the distribution of the resulting residual energy varies too much from frame to frame, then bodies close […]

Posted by christopherbatty on July 29th, 2012 | Comments Off on Mass-Splitting for Jitter-Free Parallel Rigid Body Simulation Posted in Rigid bodies

Versatile Rigid-Fluid Coupling for Incompressible SPH

Nadir Akinci, Markus Ihmsen, Gizem Akinci, Barbara Solenthaler, Matthias Teschner We propose a momentum-conserving two-way coupling method of SPH fluids and arbitrary rigid objects based on hydrodynamic forces. Our approach samples the surface of rigid bodies with boundary particles that interact with the fluid, preventing deficiency issues and both spatial and temporal discontinuities. The problem […]

Posted by christopherbatty on May 23rd, 2012 | Comments Off on Versatile Rigid-Fluid Coupling for Incompressible SPH Posted in Fluids, Rigid bodies

Adaptive Image-Based Intersection Volume

Bin Wang, Francois Faure, Dinesh Pai A method for image-based contact detection and modeling, with guaranteed precision on the intersection volume, is presented. Unlike previous image-based methods, our method optimizes a non-uniform ray sampling resolution and allows precise control of the volume error. By cumulatively projecting all mesh edges into a generalized 2D texture, we […]

Posted by christopherbatty on May 21st, 2012 | Comments Off on Adaptive Image-Based Intersection Volume Posted in Collisions, Deformables, Rigid bodies

Underwater Rigid Body Dynamics

Steffen Weissman, Ulrich Pinkall We show that the motion of rigid bodies under water can be realistically simulated by replacing the usual inertia tensor and scalar mass by the so-called Kirchhoff tensor. This allows us to model fluid-body interaction without simulating the surrounding fluid at all. We explain some of the phenomena that arise and […]

Posted by christopherbatty on May 9th, 2012 | Comments Off on Underwater Rigid Body Dynamics Posted in Fluids, Rigid bodies

PhD Thesis

Efficient and scalable simulation of solids and fluids – Jonathan Su, Stanford  

Posted by christopherbatty on April 11th, 2012 | Comments Off on PhD Thesis Posted in Deformables, Fluids, Rigid bodies
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