Computer Graphics

Chris Wojtan

The realistic simulation of complex processes in the physical world is the focus of research in the Wojtan group. Using numerical techniques, they create computer simulations of physical phenomena such as fluids, deformable bodies or cloth. Such accurate representations are required not only for computer animation, but also for medical simulations, computational physics and digital modeling. In their work, the Wojtan group combines mathematical methods from computational physics with geometric techniques from computer graphics. A key contribution of the Wojtan group is the efficient treatment of topological changes with deforming meshes that split and merge, in order to simulate highly detailed surface tension phenomena, such as the formation of water droplets and splashes. This method is used for the realistic animation of flowing and splashing water. Latest research of the group couples high-resolution embedded surface geometry to low-resolution simulations, to simulate detailed animations of elastic, plastic, and fluid phenomena.

Contact
Chris Wojtan
Institute of Science and Technology Austria (IST Austria)
Am Campus 1
A – 3400 Klosterneuburg

Phone: +43 (0)2243 9000-4401
E-mail: chris.wojtan@ist.ac.at
CV

Publication list

Chris Wojtan's website

Assistant
Elisabeth Hacker

Phone: +43 (0)2243 9000-1015
E-mail: elisabeth.hacker@remove-this.ist.ac.at

Team

  • Ryoichi Ando, Postdoc
  • Morten Bojsen-Hansen, PhD Student
  • David Hahn, PhD Student
  • Stefan Jeschke, Postdoc

Current Projects

  • Animation of detailed physics phenomena, such as elasticity, plasticity, and fracture
  • Geometry processing, including shape matching, topology changes, and surface flow
  • Efficient simulation of fluid dynamics, especially liquids

Selected Publications

  • Bojsen-Hansen M, Wojtan C. Liquid Surface Tracking with Error Compensation. ACM Transactions on Graphics 32, 4 (Proceedings of SIGGRAPH 2013), Article 68.
  • Bernstein G, Wojtan C. Putting holes in holey geometry: topology change for arbitrary surfaces. ACM Transactions on Graphics 32, 4 (Proceedings of SIGGRAPH 2013), Article 34.
  • Ando R, Thurey N, Wojtan C. Highly adaptive liquid simulations on tetrahedral meshes. ACM Transactions on Graphics 32, 4 (Proceedings of SIGGRAPH 2013), Article 103.
  • Bojsen-Hansen M, Li H, and Wojtan C. Tracking Surfaces with Evolving Topology. ACM Transactions on Graphics 31, 4 (Proceedings of SIGGRAPH 2012), Article 53.

Career

Since 2011 Assistant Professor, IST Austria
2010 PhD, Georgia Institute of Technology, USA

Selected Distinctions

2013 Microsoft Visual Computing Award
2011 Georgia Institute of Technology Sigma Chi Best PhD Thesis Award
2010 Outstanding Graduate Research Assistant Award (Georgia Institute of Technology)
2005 National Science Foundation Graduate Research Fellowship
2004 Presidential Fellowship
2003 James Scholarship

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