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Contact, Collision and Congestion

Contact, Collision and Congestion. Nobuyuki Umetani. Interactive Hybrid Simulation of Large-Scale Traffic. Jason Sewall (Intel Corporation), David Wilkie , Ming C. Ling (University of North Carolina). Motivation. Efficient traffic simulation Fast Scalable

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Contact, Collision and Congestion

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  1. Contact, Collision and Congestion Nobuyuki Umetani

  2. Interactive Hybrid Simulation of Large-Scale Traffic Jason Sewall (Intel Corporation), David Wilkie, Ming C. Ling (University of North Carolina)

  3. Motivation • Efficient traffic simulation • Fast • Scalable • Interactively moving visible region

  4. Method • Visible Region -> Agent based approach • Solve for each car speed & position • Invisible Region -> Continuum based approach • Solve for car density average velocity Invisible (Continuum Based ) Visible( Agent Based )

  5. Agent Generation from Continuum data • Stochastic Theory • Model Car distances with Poisson’s distribution • For the accuracy, λ is function of x, not constant

  6. Performance – Scalability

  7. Pattern-Guided Smoke Animation with Lagrangian Coherent Structure Zhi Yuan, Fan Chen, Ye Zhao (Kent State University)

  8. Motivation • Fit hi-res fluid simulation to low-res simulation • hi-res : detail, expensive • Low-res : no detail, cheap, controllable Hi-Res Low-Res

  9. Method • Extract skeleton from low-res fluid simulation • Fluid skeleton : Lagrangian Coherent Structure(LCS) • LCS is computed from FTLE(finite-time Lyapunov exponent) • Assimilate high-res fluid velocity to low-res at LCS

  10. Computation of LCS FTLS 0 thinning 10 thinning 5 thinning

  11. Interference Aware Geometric Modeling David Harmon (New York University), Daniele Panozzo (University of Genova), Olga Sorkine (ETH Zurich), Denis Zorin (New York University)

  12. Motivation • Deform Surface avoiding penetration • Interactive Speed • Various type surface • Close/non-close mesh • Subdivision surface

  13. Method • Space-time frame work • Space-time Interference Volume(STIV)

  14. Framework

  15. Imperceptible Relaxation of Collision Avoidance Constraints in Virtual Crowds Richard Kulpa, Anne-Helene Olivier Jan Ondrej, JulienPettre (INRIA, Grenoble, France)

  16. A Hybrid Iterative Solver for Robustly Capturing Coulomb Friction in Hair Dynamics Gilles Daviet, Florence Bertails-Descoubes, Laurence Boissieux (INRIA, Grenoble, France)

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