CS 6660: Physics-based Animation

INSTRUCTOR:    Adam Bargteil (Office hours: By appointment, WEB 2666) WEB PAGE: http://www.eng.utah.edu/~cs6660/ TIME: M/W 1:25-2:45 PLACE:     WEB L114 UNITS: 3

COURSE OVERVIEW: Physically based simulation techniques have revolutionized special effects in film and video games, creating extremely realistic effects while allowing unprecedented artistic control and avoiding dangerous situations. This course will explore physically based simulation methods for computer animation of a wide variety of phenomena and materials including rigid and deformable solids, cloth, liquids, and explosions. Students will be introduced to numerical methods, physical models, data structures, and theoretical results which form the building blocks of these methods. To gain hands-on experience, students will implement basic simulators for several phenomena.

TOPICS TO BE COVERED: Particle Systems Deformable Solids & Fracture Cloth & Thin Shells Smoke & Explosions Liquids Rigid Bodies Hair Finite Element Methods Finite Difference Methods Collision Detection & Response Stability and Implicit Integration Level Set Methods Smoothed Particle Hydrodynamics Model Reduction Techniques Simulation Control

Learning Outcomes: Students will learn to read and analyze scholarly papers. Students will improve their presentation skills by presenting papers. Students will gain an understanding of the physics-based animation literature sufficient to begin research in the area.

PREREQUISITES: Interest and enthusiasm are the most important prerequisites. Programming experience and basic familiarity with linear algebra and calculus is assumed. Some background in computer graphics is helpful.

PROGRAMMING ASSIGNMENTS: Your programming assignments should produce two final products: a short video and a short paper. The video should demonstrate your system and the paper should describe what you've done. Late Policy: You have five late days to be used over the semester. These should provide sufficient flexibility to handle other project deadlines. After using these days, there will be a 10%/day late penalty. Assignment Due Date Description Particle System Sep. 11, 2013     Description Cloth or Deformable Bodies      Oct. 9, 2013 Description Smoke Simulator Nov. 6, 2013 Description Final Project Dec. 16, 2013

TEXT: While there is no text covering the topics in this course, Physically Based Deformable Models in Computer Graphics by Andrew Nealen, Mathias Muller, Richard Keiser, Eddy Boxerman and Mark Carlson is a nice survey paper of many of the topics we will cover. Robert Bridson has recently published a book on Fluid Simulation for Computer Graphics. (The course notes are free.) The 2001 course notes on Physically Based Modeling are another good resource. Other useful resources can be found in the schedule below. If you are looking for information on openGL, I would start here: OpenGL Quick Reference Guide

CLASS SCHEDULE (subject to change) Date Topic Reading 08/26/13 Introduction 08/28/13 Particle Systems Particle Systems---a Technique for Modeling a Class of Fuzzy Objects W.T. Reeves Particle Animation and Rendering Using Data Parallel Computation Karl Sims Flocks, Herds, and Schools: A Distributed Behavioural Model Craig Reynolds 09/02/13 Labor Day. No Classes. 09/04/13 Spring Mass Systems & Elastic Bodies Physically Based Modeling: Differential Equations Basics Andrew Witkin & David Baraff Physically Based Modeling: Particle System Dynamics Andrew Witkin Elastically Deformable Models Demitri Terzopoulos, John Platt, Alan Barr, Kurt Fleischer Modeling Inelastic Deformation: Viscoelasticity, Plasticity, Fracture Demitri Terzopoulos & Kurt Fleischer 09/09/13 Finite Element Methods Graphical Modeling and Animation of Brittle Fracture James O'Brien & Jessica Hodgins Real-Time Deformation and Fracture in a Game Environment Eric G. Parker and James F. O'Brien Finite Element Notes Adam Bargteil Nonlinear Continuum Mechanics for Finite Element Analysis Javier Bonet and Richard D. Wood Further Resources 09/11/13 Stability & Implicit Integration Physically Based Modeling: Implicit Methods for Differential Equations David Baraff Physically Based Deformable Models In Computer Graphics Andrew Nealen, Mathias Muller, Richard Keiser, Eddy Boxerman, Mark Carlson 09/16/13 Co-rotated & Invertible Finite Elements Stable Real-Time Deformations M. Mueller, J. Dorsey, L. McMillan, R. Jagnow, B. Cutler Invertible Finite Elements For Robust Simulation of Large Deformation Geoffrey Irving, Joey Teran, Ron Fedkiw 09/18/13 Cloth Large Steps in Cloth Simulation David Baraff & Andrew Witkin A Quadratic Bending Model for Inextensible Surfaces Miklos Bergou, Max Wardetzky, David Harmon, Denis Zorin, Eitan Grinspun 09/23/13 Collisions & Yarn Robust Treatment of Collisions, Contact and Friction for Cloth Animation Robert Bridson, Ron Fedkiw, John Anderson Simulating Knitted Cloth at the Yarn Level Jonathan M. Kaldor, Doug L. James, Steve Marschner 09/25/13 Modal Decompositions & Reduced Coordinates Interactive Deformation Using Modal Analysis with Constraints Kris Hauser, Chen Shen, James O'Brien Real-Time Subspace Integration for St.Venant-Kirchhoff Deformable Models Jernej Barbic & Doug James 09/30/13 Shape Matching Meshless Deformations Based on Shape Matching M. Muller, B. Heidelberger, M. Teschner, M. Gross FastLSM: Fast Lattice Shape Matching for Robust Real-Time Deformation Alec Rivers & Doug James 10/02/13 Fluid Simulation using Finite Differences Realistic Animation of Liquids Nick Foster & Dimitri Metaxas Rigid, Melting and Flowing Fluid (pages 31-54) Mark Carlson 10/07/13 More Fluid Simulation Stable Fluids Jos Stam 10/09/13 Smoke & Water Visual Simulation of Smoke Ron Fedkiw, Jos Stam, Henrik Wann Jensen Animation and Rendering of Complex Water Surfaces Doug Enright, Steve Marschner, Ron Fedkiw 10/13/13 Fall Break 10/15/13 Fall Break 10/21/13 Fluid Simulation with Particles Particle-Based Fluid Simulation for Interactive Applications Mathias Mueller, D. Charypar, Markus Gross Predictive-Corrective Incompressible SPH Barbara Solenthaler and Renato Pajarola 10/23/13 Sand & Explosions Animating Sand as a Fluid Yongning Zhu, Robert Bridson Animating Suspended Particle Explosions Bryan Feldman, James O'Brien, Okan Arikan 10/28/13 Solid-Fluid Coupling Rigid Fluid: Animating the Interplay Between Rigid Bodies and Fluid Mark Carlson, Peter Mucha, Greg Turk 10/30/13 More Fluids A Fast Variational Framework for Accurate Solid-Fluid Coupling Christopher Batty, Florence Bertails, Robert Bridson A Point-based Method for Animating Incompressible Flow Funshing Sin, Adam Bargteil, Jessica Hodgins 11/04/13 Controlling Fluid Target-Driven Smoke Animation Raanan Fattal & Dani Lischinski Detail-Preserving Fluid Control Nils Thuerey, Richard Keiser, Mark Pauly & Ulrich Ruede 11/06/13 Rigid Body Dynamics Physically Based Modeling: Rigid Body Simulation David Baraff 11/11/13 Collision Detection & Handling Physically Based Modeling: Rigid Body Simulation David Baraff 11/13/13 Resting Contact & Lots of Bodies Fast Contact Force Computation for Nonpenetrating Rigid Bodies David Baraff Nonconvex Rigid Bodies with Stacking Eran Guendelman, Robert Bridson, Ron Fedkiw 11/18/13 More Contact Asynchronous Contact Mechanics David Harmon, Etienne Vouga, Breannan Smith, Rasmus Tamstorf, Eitan Grinspun 11/20/13 Viscoelastic Fluids & Elastoplastic Solids A Method for Animating Viscoelastic Fluids Tolga Goktekin, Adam Bargteil, James O'Brien Graphical Modeling and Animation of Ductile Fracture James O'Brien, Adam Bargteil, Jessica Hodgins A Finite Element Method for Animating Large Viscoplastic Flow Adam Bargteil, Chris Wojtan, Jessica Hodgins, Greg Turk 11/25/13 Embedded and Wrinkle Meshes Fast Viscoelastic Behavior with Thin Features Chris Wojtan and Greg Turk Wrinkle Meshes Matthias Muller & Nuttapong Chentanez 11/27/13 Thanksgiving. No Classes. 12/02/13 Hair Volumetric Methods for Simulation and Rendering of Hair Lena Petrovic, Mark Henne, John Anderson A Mass Spring Model for Hair Simulation Andrew Selle, Mike Lentine & Ron Fedkiw 12/04/13 Point-based Animation of Solids Point Based Animation of Elastic, Plastic and Melting Objects Matthias Mueller, Richard Keiser, Andy Nealen, Mark Pauly, Markus Gross, Marc Alexa 12/09/13 Unification & Noise Unified Simulation of Elastic Rods, Shells, and Solids Sebastian Martin, Peter Kaufmann, Mario Botsch, Eitan Grinspun, Markus Gross Curl-Noise for Procedural Fluid Flow Robert Bridson, Jim Hourihan, Marcus Nordenstam 12/11/13 Final Exam 12/16/13 Final Project Presentations 1:00-3:00 pm

METHOD OF EVALUATION: Programming Assignments      45% Final Project 25% Paper Presentations 15% Final Exam 15%