dr. R.J. (Roland) Geraerts
R.J.Geraerts@uu.nl
Gegenereerd op 2017-11-23 02:38:53


Profile

Roland Geraerts is an assistant professor at the Virtual Worlds group in the Department of Information and Computing Sciences at Utrecht University in the Netherlands. There, he obtained his PhD on sampling-based motion planning techniques. In addition, he studied quality aspects of paths and roadmaps. His current research focuses on path planning and crowd simulation in games and virtual environments. Furthermore, he currently teaches a course on crowd simulation. Roland has organized the Creative Game Challenge and is one of the cofounders of the annual Motion in Games conference.

He was involved in making simulations for the Grand Départ of the Tour de France, together with the company Movares and the city of Utrecht. In addition, crowd simulation experiments were carried out during Festival de Beschaving, and evacuation studies were performed for three metro stations of the Noord/Zuidlijn in Amsterdam.

He and his team have created a software package that integrates our crowd simulation research.

Crowd simulation

Involved in the following study programme(s)
Scientific expertise
Gegenereerd op 2017-11-23 02:38:54
Key publications

van Toll, W.G., Cook IV, A.F., van Kreveld, M.J. & Geraerts, R.J. (26.07.2017). The Medial Axis of a Multi-Layered Environment and its Application as a Navigation Mesh. (34 p.).

van Toll, W.G., Triesscheijn, Roy, Kallmann, Marcelo, Oliva, Ramon, Pelechano, Nuria, Pettré, Julien & Geraerts, R.J. (2016). A Comparative Study of Navigation Meshes. International ACM SIGGRAPH Conference on Motion in Games (pp. 91-100).

Kremyzas, Angelos, Jaklin, N.S. & Geraerts, R.J. (14.10.2016). Towards Social Behavior in Virtual-Agent Navigation. Science China Information Sciences, 59, (pp. 1) (17 p.).

Jaklin, N., van Toll, W.G. & Geraerts, R.J. (10.06.2013). Way to go - A framework for multi-level planning in games. 3rd International Planning in Games workshop (pp. 11-14) (4 p.). 3rd International Planning in Games Workshop.

All publications
  2017 - Other output
van Toll, W.G., Cook IV, A.F., van Kreveld, M.J. & Geraerts, R.J. (26.07.2017). The Medial Axis of a Multi-Layered Environment and its Application as a Navigation Mesh. (34 p.).
  2016 - Scholarly publications
van Toll, W.G., Triesscheijn, Roy, Kallmann, Marcelo, Oliva, Ramon, Pelechano, Nuria, Pettré, Julien & Geraerts, R.J. (2016). A Comparative Study of Navigation Meshes. International ACM SIGGRAPH Conference on Motion in Games (pp. 91-100).
Geraerts, R.J. (2016). Motion in games, 9th International Conference on, MIG 2016. ACM.
Hillebrand, A., van den Akker, J.M., Geraerts, R.J. & Hoogeveen, J.A. (16.12.2016). Performing Multicut on Walkable Environments - Obtaining a Minimally Connected Multi-Layered Environment from a Walkable Environment. Combinatorial Optimization and Applications (pp. 311-325) (15 p.). Springer.
Hillebrand, A., van den Akker, J.M., Geraerts, R.J. & Hoogeveen, J.A. (10.10.2016). Separating a Walkable Environment into Layers. International ACM SIGGRAPH Conference on Motion in Games (pp. 101-106) (6 p.). New York: ACM.
Kremyzas, Angelos, Jaklin, N.S. & Geraerts, R.J. (14.10.2016). Towards Social Behavior in Virtual-Agent Navigation. Science China Information Sciences, 59, (pp. 1) (17 p.).
  2015 - Scholarly publications
Jaklin, N.S., Kremyzas, Angelos & Geraerts, R.J. (2015). Adding Sociality to Virtual Pedestrian Groups. Proceedings of the 21th ACM Symposium on Virtual Reality Software and Technology (VRST 2015) (pp. 163-172) (10 p.). VRST '15 Proceedings of the 21st ACM Symposium on Virtual Reality Software and Technology.
van Toll, W.G. & Geraerts, R.J. (2015). Dynamically Pruned A* for Re-planning in Navigation Meshes. IEEE/RSJ International Conference on Intelligent Robots and Systems (pp. 2051-2057) (7 p.).
Jaklin, N.S. & Geraerts, R.J. (2015). Navigating Through Virtual Worlds - From Single Characters to Large Crowds. Handbook of Research on Gaming Trends in P-12 Education (pp. 527-554) (28 p.). IGI Global, (to appear).
van Goethem, Arthur, Jaklin, Norman, Cook IV, Atlas & Geraerts, Roland (11.03.2015). On Streams and Incentives - A Synthesis of Individual and Collective Crowd Motion. (16 p.). Utrecht: Utrecht University: Information and Computing Sciences.
  2015 - Other output
Geraerts, Roland, van Toll, W.G. & Jaklin, N.S. (2015). UU Crowd simulation framework.
  2014 - Scholarly publications
Jaklin, Norman, Tibboel, Mark & Geraerts, Roland (2014). Computing High-Quality Paths in Weighted Regions. 7th International ACM SIGGRAPH Conference on Motion in Games (pp. 77-86) (10 p.).
Bonfiglioli, Rudi, van Toll, Wouter & Geraerts, Roland (2014). GPGPU-Accelerated Construction of High-Resolution Generalized Voronoi Diagrams and Navigation Meshes. International ACM SIGGRAPH Conference on Motion in Games (pp. 25-30) (6 p.).
  2013 - Scholarly publications
van Toll, W.G., Cook, A. & Geraerts, R.J. (2013). Game-Changing: Fast Dynamic Updates in a Flexible Navigation Mesh. ASCI.OPEN ASCI/ICT.OPEN 2013.
Jaklin, N., Cook IV, Atlas & Geraerts, R.J. (2013). Real-Time Path Planning in Heterogeneous Environments. Computer Animation and Virtual Worlds, 24 (3), (pp. 285-295) (11 p.). Computer animation and social agents.
Karamouzas, I., Geraerts, R.J. & van der Stappen, A.F. (2013). Space-time Group Motion Planning. In E Frazzoli, T. Lozano-Perez, N. Roy & D. Rus (Eds.), Algorithmic Foundations of Robotics X - Proceedings of the Tenth Workshop on the Algorithmic Foundations of Robotics (pp. 227-243) (17 p.). Springer-Verlag Berlin Heidelberg, Workshop on the Algorithmic Foundations of Robotics.
Jaklin, N., Cook, A. & Geraerts, R.J. (2013). Stay off the lawn! Creating smooth paths based on region preferences. ASCI.OPEN2013, Eindhoven ASCI/ICT.OPEN 2013.
Janer, J., Geraerts, R.J., van Toll, W.G. & Bonada, J. (2013). Talking soundscapes: Automatizing voice transformations for crowd simulation. AES 49th Conference Audio for Games (pp. 1-7) (7 p.). AES 49th Conference Audio for Games.
Jaklin, N., van Toll, W.G. & Geraerts, R.J. (10.06.2013). Way to go - A framework for multi-level planning in games. 3rd International Planning in Games workshop (pp. 11-14) (4 p.). 3rd International Planning in Games Workshop.
  2012 - Scholarly publications
van Toll, W.G., Cook IV, A.F. & Geraerts, R.J. (2012). A navigation mesh for dynamic environments. Computer Animation and Virtual Worlds, 23 (6), (pp. 535-546) (12 p.).
van Toll, W.G., Cook IV, A.F. & Geraerts, R.J. (2012). Realistic Crowd Simulation with Density-Based Path Planning. In A. Iosup (Eds.), Advanced School for Computing and Imaging (ASCI) - ICT.OPEN (pp. 3-9) (7 p.). Rotterdam, ICT.OPEN.
van Toll, W.G., Cook IV, A.F. & Geraerts, R.J. (2012). Real-Time Density-Based Crowd Simulation. Computer Animation and Virtual Worlds, 23 (1), (pp. 59-69) (11 p.).
  2011 - Scholarly publications
van Basten, B.J.H., Egges, A. & Geraerts, R.J. (2011). Combining Path Planners and Motion Graphs. Computer Animation and Virtual Worlds, 22, (pp. 59-78) (20 p.).
van Toll, W.G., Cook IV, A.F. & Geraerts, R.J. (2011). Multi-Layered Navigation Meshes. ASCI - IPA - SIKS tracks, ICT.OPEN (pp. 317-323). This paper has received the best paper award ASCI 2011..
van Toll, W.G., Cook IV, A.F. & Geraerts, R.J. (2011). Navigation Meshes for Realistic Multi-Layered Environments. IEEE/RSJ International Conference on Intelligent Robots and Systems (pp. 3526-3532) (7 p.). IEEE/RSJ International Conference on Intelligent Robots and Systems.
Cabello, J.M., Franco, J.M., Collado, A, Janer, J., Cruz-Lara, S., Oyarzun, D., Armisen, A. & Geraerts, R.J. (2011). Standards in Virtual Worlds Virtual Travel Use Case Metaverse1 Project. Journal of Virtual Worlds Research, 4 (3), (pp. 1-29) (29 p.).
  2010 - Scholarly publications
van den Akker, M., Geraerts, R.J., Hoogeveen, J.A. & Prins, C. (2010). Path Planning for Groups using Column Generation. Department of Information and Computing Sciences, Utrecht University, UUCS2010019.
van den Akker, J.M., Geraerts, R.J., Hoogeveen, J.A. & Prins, C. (2010). Path Planning for Groups using Column Generation. Proceeding of the Third International Conference on Motion in Games (MIG 2010) (pp. 94-105) (12 p.). Springer.
Geraerts, R.J. (2010). Planning Short Paths with Clearance using Explicit Corridors. International Conference on Robotics and Automation (pp. 1997-2010) (14 p.). IEEE, International Conference on Robotics and Automation.
Geraerts, R.J. & Schager, E. (2010). Stealth-Based Path Planning using Corridor Maps. Computer Animation and Social Agents Computer Animation and Social Agents.
  2009 - Scholarly publications
Geraerts, R.J. (21.11.2009). Camera Planning in Virtual Environments using the Corridor Map Method. In R. Geraerts, M.H. Overmars & A. Egges (Eds.), The Second International Workshop on Motion in Games (MIG'09) (pp. 194-209) (16 p.). Springer, Motion in Games.
Karamouzas, I., Geraerts, R.J. & Overmars, M.H. (2009). Indicative Routes for Path Planning and Crowd Simulation. In J. Whitehead & R.M. Young (Eds.), The Fourth International Conference on the Foundations of Digital Games (pp. 113-120) (8 p.). ACM, KGO09.
Egges, A., Geraerts, R.J. & Overmars, M.H. (2009). Motion in Games, Second International Workshop, MIG 2009. Heidelberg: Springer, DBLP:conf/mig/2009.
  2008 - Scholarly publications
Geraerts, R.J. & Overmars, M.H. (2008). Enhancing Corridor Maps for Real-Time Path Planning in Virtual Environments. In J. Noh, K. Wohn & G.J. Kim (Eds.), Computer Animation and Social Agents (pp. 64-71) (8 p.). GO08a.
Overmars, M.H., Karamouzas, I. & Geraerts, R.J. (2008). Flexible Path Planning Using Corridor Maps. In D. Halperin & K. Mehlhorn (Eds.), Algorithms -- ESA (pp. 1-12) (12 p.). Springer, OIR08.
Geraerts, R.J., Kamphuis, A., Karamouzas, I. & Overmars, M.H. (14.06.2008). Using the Corridor Map Method for Path Planning for a Large Number of Characters. In A. Egges, A. Kamphuis & M.H. Overmars (Eds.), Motion in Games (MIG'08) (pp. 11-22) (12 p.). Springer, GO08b International Conference of the Learning Sciences 2008.
  2007 - Scholarly publications
Geraerts, R.J. & Overmars, M.H. (2007). Creating High-Quality Paths for Motion Planning. International Journal of Robotics Research, 26, (pp. 845-863) (19 p.). GO07d.
Geraerts, R.J. & Overmars, M.H. (2007). Reachability-based Analysis for Probabilistic Roadmap Planners. Robotics and Autonomous Systems, 55, (pp. 824-836) (13 p.). GO07c.
Geraerts, R.J. & Overmars, M.H. (2007). The Corridor Map Method: A General Framework for Real-Time High-Quality Path Planning. Computer Animation and Virtual Worlds, 18, (pp. 107-119) (13 p.). GO07b.
Geraerts, R.J. & Overmars, M.H. (2007). The Corridor Map Method: Real-Time High-Quality Path Planning. Proceedings of the IEEE International Conference on Robotics and Automation Computer Animation and Social Agents.
  2006 - Scholarly publications
Geraerts, R.J. & Overmars, M.H. (2006). Creating High-quality Roadmaps for Motion Planning in Virtual Environments. IEEE/RSJ International Conference on Intelligent Robots and Systems (pp. 4355-4361) (7 p.).
Geraerts, R.J. (2006). On Experimental Research in Sampling-based Motion Planning. In AP del Pobil (Eds.), Workshop on Benchmarks in Robotics Research (pp. 31-34) (4 p.). Beijing, China, IEEE/RSJ International Conference on Intelligent Robots and Systems.
Geraerts, R.J. & Overmars, M.H. (2006). Sampling and Node Adding in Probabilistic Roadmap Planners. Robotics and Autonomous Systems, 54, (pp. 165-173) (9 p.). GO06.
  2005 - Scholarly publications
Geraerts, R.J. & Overmars, M.H. (2005). Creating small roadmaps for solving motion planning problems. Proc. 11th IEEE International Conference on Methods and Models in Automation and Robotics (pp. 531-536) (6 p.). Methods and Models in Automation and Robotics.
Geraerts, R.J. & Overmars, M.H. (2005). On Improving the Clearance for Robots in High-Dimensional Configuration Spaces. onbekend: UU WINFI Informatica en Informatiekunde.
Geraerts, R.J. & Overmars, M.H. (2005). On improving the clearance for robots in high-dimensional configuration spaces. IEEE/RSJ International Conference on Intelligent Robots and Systems (pp. 4075-4079) (5 p.). Intelligent Robots and Systems.
Geraerts, R.J. & Overmars, M.H. (2005). On the Analysis and Success of Sampling Based Motion Planning. Conference of the Advanced School for Computing and Imaging (pp. 313-319) (7 p.). GO05d.
Geraerts, R.J. & Overmars, M.H. (2005). Reachability analysis of sampling based planners. Proceedings of the IEEE International Conference on Robotics and Automation (pp. 406-412) (7 p.). International Conference on Robotics and Automation.
  2004 - Scholarly publications
Geraerts, R.J. & Overmars, M.H. (2004). Clearance Based Path Optimization for Motion Planning. IEEE Int. Conf. on Robotics and Automation (pp. 2386-2392) (7 p.). GO04b.
Geraerts, R.J. & Overmars, M.H. (2004). On Improving the Path Quality for Motion Planning. Conference of the Advanced School for Computing and Imaging (ASCI) (pp. 211-217) (7 p.). GO04c.
Geraerts, R.J. & Overmars, M.H. (2004). Sampling Techniques for Probabilistic Roadmap Planners. Conference on Intelligent Autonomous Systems (pp. 600-609) (10 p.). GO04a.
  2003 - Scholarly publications
Geraerts, R.J. & Overmars, M.H. (2003). A comparative study of probabilistic roadmap planners. In J-D. Boissonnat, J. Burdick, K. Goldberg & S. Hutchinson (Eds.), Algorithmic Foundations of Robotics V Berlijn: Springer, pagina 43-57.
Geraerts, R.J. & Overmars, M.H. (2003). Clearance Based Path Optimization for Motion Planning. Utrecht`: Utrecht University: Information and Computing Sciences.
Geraerts, R.J. & Overmars, M.H. (2003). Sampling Techniques for Probabilistic Roadmap Planners. Utrecht: Utrecht University: Information and Computing Sciences.
  2002 - Scholarly publications
Geraerts, R.J. & Overmars, M.H. (2002). A Comparative Study of Probabilistic Roadmap Planners. Utrecht, The Netherlands: Utrecht University: Information and Computing Sciences.
Geraerts, R.J. & Overmars, M.H. (2002). A Comparative Study of Probabilistic Roadmap Planners. Proceedings Workshop on the Algorithmic Foundations of Robotics (WAFR)
  0 - Other output
R.J. Geraerts () Separating a polygonal environment into a multi-layered environments
R.J. Geraerts () Separating a polygonal environment into a multi-layered environments
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Gegenereerd op 2017-11-23 02:38:54

Crowd simulation

A huge challenge is to simulate tens of thousands of characters in real-time where they pro-actively and realistically avoid collisions with each other and with obstacles present in their environment. This environment contains semantic information (e.g. roads and bicycle lanes, dangerous and pleasant areas), is three-dimensional (e.g. contains bridges where people can walk over and under as well) and can dynamically change (e.g. a bridge partially collapses). We currently study how to create a generic data structure, i.e. a navigation mesh, for such environments and how it can be updated dynamically and efficiently. Next, we study how (groups of) people move and avoid collisions in such environments, based on character profiles and semantics. We run our simulations in realistic environments (e.g. soccer stadiums or train stations) and game levels to study the effectiveness of our methods. Finally, we have created a software package that integrates this research.

An overview on our work on crowd simulation is given in the movie below (in Dutch).

More videos can be found on our YouTube channel.

PhD students

A lot of this research has been carried out by my PhD students Wouter van Toll, Norman Jaklin and Arne Hillebrand.

More information

More information can be found on my research homepage.

Gegenereerd op 2017-11-23 02:38:54

This year I will be involved in the following course:

I'm, together with Maarten Loffler, the master coordinator of the master programme Game and Media Technology. Furthermore, I'm a tutor.

I've obtained a Basic Teaching Qualification.

Gegenereerd op 2017-11-23 02:38:54
Full name
dr. R.J. Geraerts Contact details
Buys Ballotgebouw

Princetonplein 5
Room BBL-418
3584 CC  UTRECHT
The Netherlands


Phone number (direct) +31 30 253 3977
Phone number (department) +31 30 253 4109
Postal address
Postbus 80.089
3508 TB    UTRECHT
The Netherlands
Availability
Mo Tue Wed Thu Fr
Morning
Afternoon

I work at home on Thursdays.

Gegenereerd op 2017-11-23 02:38:54
Last updated 31.08.2017