Updated Sparse Cholesky Factors for Corotational Elastodynamics

Florian Hecht, Yeon Jin Lee, Jonathan Shewchuk, James O’Brien We present warp-canceling corotation, a nonlinear finite element formulation for elastodynamic simulation that achieves fast performance by making only partial or delayed changes to the simulation’s linearized system matrices. Coupled with an algorithm for incremental updates to a sparse Cholesky factorization, the method realizes the stability […]

Posted by christopherbatty on March 19th, 2012 | Comments Off on Updated Sparse Cholesky Factors for Corotational Elastodynamics Posted in Cloth, Deformables

Asynchronous Integration with Phantom Meshes

David Harmon, Qingnan Zhou, Denis Zorin Asynchronous variational integration of layered contact models provides a framework for robust collision handling, correct physical behavior, and guaranteed eventual resolution of even the most difficult contact problems. Yet, even for low-contact scenarios, this approach is significantly slower compared to its less robust alternatives — often due to handling […]

Posted by christopherbatty on August 16th, 2011 | Comments Off on Asynchronous Integration with Phantom Meshes Posted in Cloth, Collisions, Deformables

Sensitive Couture for Interactive Garment Editing and Modeling

Nobuyuki Umetani, Danny M. Kaufman, Takeo Igarashi, Eitan Grinspun We present a novel interactive tool for garment design that enables, for the first time, interactive bidirectional editing between 2D patterns and 3D high-fidelity simulated draped forms. This provides a continuous, interactive, and natural design modality in which 2D and 3D representations are simultaneously visible and […]

Posted by christopherbatty on July 28th, 2011 | Comments Off on Sensitive Couture for Interactive Garment Editing and Modeling Posted in Cloth, Shells

Physics-inspired Upsampling for Cloth Simulation in Games

Ladislav Kavan, Dan Gerszewski, Peter-Pike Sloan, Adam W. Bargteil We propose a method for learning linear upsampling operators for physically-based cloth simulation, allowing us to enrich coarse meshes with mid-scale details in minimal time and memory budgets, as required in computer games. In contrast to classical subdivision schemes, our operators adapt to a specific context […]

Posted by christopherbatty on July 26th, 2011 | Comments Off on Physics-inspired Upsampling for Cloth Simulation in Games Posted in Cloth, Deformables

Data-Driven Elastic Models for Cloth: Modeling and Measurement

Cloth often has complicated nonlinear, anisotropic elastic behavior due to its woven pattern and fiber properties. However, most current cloth simulation techniques simply use linear and isotropic elastic models with manually selected stiffness parameters. Such simple simulations do not allow differentiating the behavior of distinct cloth materials such as silk or denim, and they cannot […]

Posted by christopherbatty on May 4th, 2011 | Comments Off on Data-Driven Elastic Models for Cloth: Modeling and Measurement Posted in Cloth, Deformables, Shells

Fast and Scalable CPU/GPU Collision Detection for Rigid and Deformable Surfaces

We present a new hybrid CPU/GPU collision detection technique for rigid and deformable objects based on spatial subdivision. Our approach efficiently exploits the massive computational capabilities of modern CPUs and GPUs commonly found in off-the-shelf computer systems. The algorithm is specifically tailored to be highly scalable on both the CPU and the GPU sides. We […]

Posted by christopherbatty on December 3rd, 2010 | Comments Off on Fast and Scalable CPU/GPU Collision Detection for Rigid and Deformable Surfaces Posted in Cloth, Collisions, Deformables, Rigid bodies

Animation Wrinkling: Augmenting Coarse Cloth Simulations with Realistic-Looking Wrinkles

Moving garments and other cloth objects exhibit dynamic, complex wrinkles. Generating such wrinkles in a virtual environment currently requires either a time-consuming manual design process, or a computationally expensive simulation, often combined with accurate parameter-tuning requiring specialized animator skills. Our work presents an alternative approach for wrinkle generation which combines coarse cloth animation with a […]

Posted by christopherbatty on September 22nd, 2010 | Comments Off on Animation Wrinkling: Augmenting Coarse Cloth Simulations with Realistic-Looking Wrinkles Posted in Cloth

Multi-Resolution Isotropic Strain Limiting

In this paper we describe a fast strain-limiting method that allows stiff, incompliant materials to be simulated efficiently. Unlike prior approaches, which act on springs or individual strain components, this method acts on the strain tensors in a coordinate-invariant fashion allowing isotropic behavior. Our method applies to both two- and three-dimensional strains, and only requires […]

Posted by christopherbatty on September 13th, 2010 | Comments Off on Multi-Resolution Isotropic Strain Limiting Posted in Cloth, Deformables

Multi-Resolution Cloth Simulation

We propose a novel, multi-resolution method to efficiently perform large-scale cloth simulation. Our cloth simulation method is based on a triangle-based energy model constructed from a cloth mesh. We identify that solutions of the linear system of cloth simulation are smooth in certain regions of the cloth mesh and solve the linear system on those […]

Posted by christopherbatty on August 6th, 2010 | Comments Off on Multi-Resolution Cloth Simulation Posted in Cloth

A Deformation Transformer for Real-Time Cloth Animation

Achieving interactive performance in cloth animation has significant implications in computer games and other interactive graphics applications. Although much progress has been made, it is still much desired to have real-time high-quality results that well preserve dynamic folds and wrinkles. In this paper, we introduce a hybrid method for real-time cloth animation. It relies on […]

Posted by christopherbatty on July 17th, 2010 | Comments Off on A Deformation Transformer for Real-Time Cloth Animation Posted in Cloth
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