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Dr. R.J. (Roland) Geraerts

Universitair hoofddocent 
Bètawetenschappen
Informatica
Algorithms
Geometric Computing
Geometric Computing
Buys Ballotgebouw
Princetonplein 5
Kamer BBG-4.08
3584 CC Utrecht

Dr. R.J. (Roland) Geraerts

Universitair hoofddocent
Geometric Computing
030 253 3977
r.j.geraerts@uu.nl
Profiel Publicaties Prijzen In de media Onderzoek Onderwijs Nevenwerkzaamheden Contact
Profiel Publicaties Prijzen In de media Onderzoek Onderwijs Nevenwerkzaamheden Contact
Expertises
Vaardigheden
Onderzoeksthema's

Sleutelpublicaties

van Toll, W. G., Triesscheijn, R., Kallmann, M., Oliva, R., Pelechano, N., Pettré, J., & Geraerts, R. J. (2016). A Comparative Study of Navigation Meshes. In International ACM SIGGRAPH Conference on Motion in Games (pp. 91-100). ACM. https://doi.org/10.1145/2994258.2994262
van Toll, W. G., Cook IV, A. F., van Kreveld, M. J., & Geraerts, R. J. (2018). The Medial Axis of a Multi-Layered Environment and its Application as a Navigation Mesh. ACM Transactions on Spatial Algorithms and Systems, 4(1), [2]. https://doi.org/10.1145/3204456
Kremyzas, A., Jaklin, N. S., & Geraerts, R. J. (2016). Towards Social Behavior in Virtual-Agent Navigation. Science China Information Sciences, 59, [112102]. https://doi.org/10.1007/s11432-016-0074-9
Jaklin, N., van Toll, W. G., & Geraerts, R. J. (2013). Way to go - A framework for multi-level planning in games. In 3rd International Planning in Games workshop (pp. 11-14) http://icaps13.icaps-conference.org/technical-program/workshop-program/planning-in-games/

Publicaties

2022

Wetenschappelijke publicaties

Ashraf, I., Muijres, F., Lankheet, M. J., Jeroen, S., Zeegers, J., & Geraerts, R. (2022). Mosquito flight in turbulent airflow. Poster session presented at Bulletin of the American Physical Society - 75th Annual Meeting of the Division of Fluid Dynamics, Indianapolis. Indiana, United States.
Zhao, Y., & Geraerts, R. (2022). Automatic Parameter Tuning via Reinforcement Learning for Crowd Simulation with Social Distancing. Paper presented at International Conference on Methods and Models in Automation and Robotics, Miedzyzdroje, Poland. https://doi.org/10.1109/MMAR55195.2022.9874284
Giannias, N., Geraerts, R., Harris, E., Herfst, S., Hobson-Sayers, A., & Thorpe, A. (2022). Large Scale Pattern of Life Simulation for Real-Time Applications. 1-14. Paper presented at Interservice/Industry Training, Simulation, and Education Conference, Orlando, United States.

2020

Wetenschappelijke publicaties

Hillebrand, A., Hoogeveen, H., & Geraerts, R. (2020). Comparing Different Metrics Quantifying Pedestrian Safety. Collective Dynamics, 5, 158-166. https://doi.org/10.17815/CD.2020.46
https://dspace.library.uu.nl/bitstream/handle/1874/427751/admin_20.pdf?sequence=1
Savenije, N., Geraerts, R. J., & Hürst, W. (2020). CrowdAR Table - An AR system for Real-time Interactive Crowd Simulation. In IEEE AIVR 2020 IEEE. https://doi.org/10.1109/AIVR50618.2020.00021
van Toll, W. G., Triesscheijn, R., Kallmann, M., Oliva, R., Pelechano, N., Pettré, J., & Geraerts, R. J. (2020). Comparing navigation meshes: theoretical analysis and practical metrics. Computers and Graphics, 91, 52-82. https://doi.org/10.1016/j.cag.2020.06.006

2019

Wetenschappelijke publicaties

Hürst, W. O., Geraerts, R. J., & Zhao, Y. (2019). CrowdAR Table - An AR Table for Interactive Crowd Simulation. In IEEE AIVR 2019: 2019 IEEE International Conference on Artificial Intelligence and Virtual Reality (pp. 302-305). IEEE. https://doi.org/10.1109/AIVR46125.2019.00070
Adrian, J., Bode, N., Amos, M., Baratchi, M., Beermann, M., Boltes, M., Corbetta, A., Dezecache, G., Drury, J., Fu, Z., Geraerts, R. J., Gwynne, S., Hofinger, G., Hunt, A., Kanters, T., Kneidl, A., Konya, K., Köster, G., Küpper, M., ... Wijermans, N. (2019). A Glossary for Research on Human Crowd Dynamics. In Collective Dynamics. Collective Dynamics, 4(A19), 1-13. [A19]. https://doi.org/10.17815/CD.2019.19
Hürst, W. O., & Geraerts, R. J. (Accepted/In press). Augmented and Virtual Reality Interfaces for Crowd Simulation Software: A Position Statement for Research on Use-Case-Dependent Interaction. In 2019 IEEE Virtual Humans and Crowds for Immersive Environments, VHCIE 2019: Osaka, Japan, 24 March 2019 [8714733] IEEE. https://doi.org/10.1109/VHCIE.2019.8714733

2018

Wetenschappelijke publicaties

Vermeulen, J. L., Hillebrand, A., & Geraerts, R. (2018). Annotating Traversable Gaps in Walkable Environments. In 2018 IEEE International Conference on Robotics and Automation (ICRA) (pp. 3045-3052) https://doi.org/10.1109/ICRA.2018.8461152
Hillebrand, A., Hoogeveen, J. A., & Geraerts, R. J. (Accepted/In press). Comparing different metrics quantifying pedestrian safety. In Proceedings of Pedestrian and Evacuation Dynamics 2018 [18]
Hillebrand, A., Hoogeveen, J. A., & Geraerts, R. J. (2018). Comparing different metrics quantifying pedestrian safety. Poster session presented at ICT.OPEN 2018, Amersfoort, Netherlands.
https://dspace.library.uu.nl/bitstream/handle/1874/396446/poster_no_bleed_v5.pdf?sequence=1
van Toll, W. G., Cook IV, A. F., van Kreveld, M. J., & Geraerts, R. J. (2018). The Medial Axis of a Multi-Layered Environment and its Application as a Navigation Mesh. ACM Transactions on Spatial Algorithms and Systems, 4(1), [2]. https://doi.org/10.1145/3204456

Overige resultaten

van Toll, W. G., Triesscheijn, R., Kallmann, M., Oliva, R., Pelechano, N., Pettré, J., & Geraerts, R. J. (2018). A Comparative Study of Navigation Meshes. ICT.OPEN 2018, Amersfoort, Netherlands.

2017

Wetenschappelijke publicaties

Vermeulen, J., Hillebrand, A., & Geraerts, R. J. (2017). A Comparative Study of k-Nearest Neighbour Techniques in Crowd Simulation. Computer Animation and Virtual Worlds, 28(3-4), [E1775]. https://doi.org/10.1002/cav.1775

Overige resultaten

van Toll, W. G., Cook IV, A. F., van Kreveld, M. J., & Geraerts, R. J. (2017, Jul 26). The Medial Axis of a Multi-Layered Environment and its Application as a Navigation Mesh. arXiv.org.

2016

Wetenschappelijke publicaties

Geraerts, R. J. (Ed.) (2016). Motion in games, 9th International Conference on, MIG 2016. ACM.
Kremyzas, A., Jaklin, N. S., & Geraerts, R. J. (2016). Towards Social Behavior in Virtual-Agent Navigation. Science China Information Sciences, 59, [112102]. https://doi.org/10.1007/s11432-016-0074-9
Hillebrand, A., Van Den Akker, M., Geraerts, R., & Hoogeveen, H. (2016). Separating a walkable environment into layers. In S. N. Spencer (Ed.), Proceedings - Motion in Games 2016: 9th International Conference on Motion in Games, MIG 2016 (pp. 101-106). [2994271] (Proceedings - Motion in Games 2016: 9th International Conference on Motion in Games, MIG 2016). ACM. https://doi.org/10.1145/2994258.2994271
van Toll, W. G., Triesscheijn, R., Kallmann, M., Oliva, R., Pelechano, N., Pettré, J., & Geraerts, R. J. (2016). A Comparative Study of Navigation Meshes. In International ACM SIGGRAPH Conference on Motion in Games (pp. 91-100). ACM. https://doi.org/10.1145/2994258.2994262
Hillebrand, A., van den Akker, M., Geraerts, R., & Hoogeveen, H. (2016). Performing multicut on walkable environments: Obtaining a minimally connected multi-layered environment from a walkable environment. In M. Li, L. Wang, & T-H. H. Chan (Eds.), Combinatorial Optimization and Applications - 10th International Conference, COCOA 2016, Proceedings (Vol. 10043, pp. 311-325). (Lecture Notes in Computer Science (including subseries Lecture Notes in Artificial Intelligence and Lecture Notes in Bioinformatics); Vol. 10043 LNCS). Springer. https://doi.org/10.1007/978-3-319-48749-6_23, https://doi.org/10.1007/978-3-319-48749-6_23

Overige resultaten

Hillebrand, A., van den Akker, J. M., Geraerts, R. J., & Hoogeveen, J. A. (2016). Obtaining a minimally connected multi-layered environment from a walkable environment. Poster session presented at ICT.OPEN 2016, Amersfoort, Netherlands.
van Toll, W. G., & Geraerts, R. J. (2016). DPA*: Dynamically Pruned A* for Re-planning in Navigation Meshes. Poster session presented at ICT.OPEN 2016, Amersfoort, Netherlands.
van Toll, W. G., Cook, A., van Kreveld, M., & Geraerts, R. J. (2016). The Explicit Corridor Map: Using the Medial Axis for Real-Time Path Planning and Crowd Simulation. 70:1-70:5. Paper presented at International Computational Geometry Multimedia Exposition, Boston, United States.
https://dspace.library.uu.nl/bitstream/handle/1874/343232/The_Explicit_Corridor_Map_Using_the_Medial_Axis_for_Real_Time_Path_Planning_and_Crowd_Simulation_SoCG_2016.pdf?sequence=1

2015

Wetenschappelijke publicaties

Jaklin, N. S., Kremyzas, A., & Geraerts, R. J. (2015). Adding Sociality to Virtual Pedestrian Groups. In Proceedings of the 21th ACM Symposium on Virtual Reality Software and Technology (VRST 2015) (pp. 163-172) https://doi.org/10.1145/2821592.2821597
Jaklin, N. S., & Geraerts, R. J. (2015). Navigating Through Virtual Worlds: From Single Characters to Large Crowds. In Handbook of Research on Gaming Trends in P-12 Education (pp. 536-565). IGI Global. https://doi.org/10.4018/978-1-4666-9629-7.ch025
van Toll, W. G., & Geraerts, R. J. (2015). Dynamically Pruned A* for Re-planning in Navigation Meshes. In IEEE/RSJ International Conference on Intelligent Robots and Systems (pp. 2051-2057) https://doi.org/10.1109/IROS.2015.7353649
van Goethem, A., Jaklin, N., Cook IV, A., & Geraerts, R. (2015). On Streams and Incentives: A Synthesis of Individual and Collective Crowd Motion. (Technical Report Series; No. UU-CS_2015-005). Utrecht University: Information and Computing Sciences.
https://dspace.library.uu.nl/bitstream/handle/1874/310187/Technical_Report_UU_CS_2015_005_On_Streams_and_Incentives.pdf?sequence=1

Overige resultaten

Geraerts, R. J. (2015). On Streams and Incentives: A Synthesis of Individual and Collective Crowd Motion.
https://dspace.library.uu.nl/bitstream/handle/1874/349105/On_Streams_and_Incentives_A_Synthesis_of_Individual_and_Collective_Crowd_Motion_CASA_short_paper_2015_1_.pdf?sequence=1
van Toll, W. G., Jaklin, N. S., & Geraerts, R. J. (2015). A Generic Multi-Level Framework for Agent Navigation. Poster session presented at 8th International ACM SIGGRAPH Conference on Motion in Games, Paris, France.
van Toll, W., Jaklin, N., & Geraerts, R. (2015). Towards Believable Crowds: A Generic Multi-Level Framework for Agent Navigation. Paper presented at ASCI.OPEN 2015, Amersfoort, Netherlands.
https://dspace.library.uu.nl/bitstream/handle/1874/310188/Towards_believable_crowds_A_generic_multi_level_framework_for_agent_navigation_ASCI_Open_2015.pdf?sequence=1
Geraerts, R. (Author), van Toll, W. G. (Author), & Jaklin, N. S. (Author). (2015). UU Crowd simulation framework. Software http://www.staff.science.uu.nl/~gerae101/motion_planning/ecm/index.php

2014

Wetenschappelijke publicaties

Jaklin, N., Tibboel, M., & Geraerts, R. (2014). Computing High-Quality Paths in Weighted Regions. In 7th International ACM SIGGRAPH Conference on Motion in Games (pp. 77-86) https://doi.org/10.1145/2668064.2668097
Bonfiglioli, R., van Toll, W., & Geraerts, R. (2014). GPGPU-Accelerated Construction of High-Resolution Generalized Voronoi Diagrams and Navigation Meshes. In International ACM SIGGRAPH Conference on Motion in Games (pp. 25-30) http://www.staff.science.uu.nl/~3117456/pub_details.php?pub=2014-01-gpgpu

2013

Wetenschappelijke publicaties

Jaklin, N., Cook, A., & Geraerts, R. J. (2013). Stay off the lawn! Creating smooth paths based on region preferences. In ASCI.OPEN2013, Eindhoven
https://dspace.library.uu.nl/bitstream/handle/1874/309613/paper_4.pdf?sequence=1
van Toll, W. G., Cook, A., & Geraerts, R. J. (2013). Game-Changing: Fast Dynamic Updates in a Flexible Navigation Mesh. In ASCI.OPEN
https://dspace.library.uu.nl/bitstream/handle/1874/315447/GameChanging-Paper-ASCIOPEN-2013.pdf?sequence=1
Janer, J., Geraerts, R. J., van Toll, W. G., & Bonada, J. (2013). Talking soundscapes: Automatizing voice transformations for crowd simulation. In AES 49th Conference Audio for Games (pp. 1-7) http://www.aes.org/e-lib/browse.cfm?elib=16650
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). (Springer Tracts in Advanced Robotics; Vol. 86). Springer-Verlag Berlin Heidelberg. https://doi.org/10.1007/978-3-642-36279-8
Jaklin, N., van Toll, W. G., & Geraerts, R. J. (2013). Way to go - A framework for multi-level planning in games. In 3rd International Planning in Games workshop (pp. 11-14) http://icaps13.icaps-conference.org/technical-program/workshop-program/planning-in-games/
Jaklin, N., Cook IV, A., & Geraerts, R. J. (2013). Real-Time Path Planning in Heterogeneous Environments. Computer Animation and Virtual Worlds, 24(3), 285-295. https://doi.org/10.1002/cav.1511

2012

Wetenschappelijke publicaties

van Toll, W. G., Cook IV, A. F., & Geraerts, R. J. (2012). Realistic Crowd Simulation with Density-Based Path Planning. In A. Iosup (Ed.), Advanced School for Computing and Imaging (ASCI) - ICT.OPEN (pp. 3-9). http://www.cs.uu.nl/~roland/motion_planning/real-time_density-based_crowd_simulation.html

2011

Wetenschappelijke publicaties

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), 1-29. https://doi.org/10.4101/jvwr.v4i3.6129
van Toll, W. G., Cook IV, A. F., & Geraerts, R. J. (2011). Navigation Meshes for Realistic Multi-Layered Environments. In IEEE/RSJ International Conference on Intelligent Robots and Systems (pp. 3526-3532) http://people.cs.uu.nl/roland/motion_planning/navmesh.html

2010

Wetenschappelijke publicaties

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.
Geraerts, R. J. (2010). Planning Short Paths with Clearance using Explicit Corridors. In International Conference on Robotics and Automation (pp. 1997-2010). IEEE. https://doi.org/10.1109/ROBOT.2010.5509263
Geraerts, R. J., & Schager, E. (2010). Stealth-Based Path Planning using Corridor Maps. In Computer Animation and Social Agents http://www.cs.uu.nl/~roland/motion_planning/stealth_corridor_map/index.html

2009

Wetenschappelijke publicaties

Geraerts, R. J. (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). Springer. http://www.springer.com/computer/computer+imaging/book/978-3-642-10346-9
Egges, A., Geraerts, R. J., & Overmars, M. H. (2009). Motion in Games, Second International Workshop, MIG 2009. (Lecture Notes in Computer Science ed.) Springer. http://www.springerlink.com/content/978-3-642-10346-9/
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). ACM. http://people.cs.uu.nl/roland/motion_planning/irm.html

2008

Wetenschappelijke publicaties

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). Springer. http://people.cs.uu.nl/roland/pdf/esa08.pdf
Geraerts, R. J., Kamphuis, A., Karamouzas, I., & Overmars, M. H. (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). Springer. http://people.cs.uu.nl/roland/pdf/mig08.pdf

2007

Wetenschappelijke publicaties

Geraerts, R. J., & Overmars, M. H. (2007). The Corridor Map Method: Real-Time High-Quality Path Planning. In Proceedings of the IEEE International Conference on Robotics and Automation http://www.cs.uu.nl/~roland/motion_planning/cmm.html
Geraerts, R. J., & Overmars, M. H. (2007). Reachability-based Analysis for Probabilistic Roadmap Planners. Robotics and Autonomous Systems, 55, 824-836.
https://dspace.library.uu.nl/bitstream/handle/1874/31849/reachabilityRAS.pdf?sequence=2
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, 107-119.
https://dspace.library.uu.nl/bitstream/handle/1874/31848/corridorCAVW.pdf?sequence=1
Geraerts, R. J., & Overmars, M. H. (2007). Creating High-Quality Paths for Motion Planning. International Journal of Robotics Research, 26, 845-863.
https://dspace.library.uu.nl/bitstream/handle/1874/31850/hqpijr.pdf?sequence=1

2006

Wetenschappelijke publicaties

Geraerts, R. J., & Overmars, M. H. (2006). Creating High-quality Roadmaps for Motion Planning in Virtual Environments. In IEEE/RSJ International Conference on Intelligent Robots and Systems (pp. 4355-4361) http://www.cs.uu.nl/~roland/motion_planning/hqr.html
Geraerts, R. J., & Overmars, M. H. (2006). Sampling and Node Adding in Probabilistic Roadmap Planners. Robotics and Autonomous Systems, 54, 165-173.
https://dspace.library.uu.nl/bitstream/handle/1874/31845/sampling2.pdf?sequence=2
Geraerts, R. J. (2006). On Experimental Research in Sampling-based Motion Planning. In AP. del Pobil (Ed.), Workshop on Benchmarks in Robotics Research (pp. 31-34). http://www.cs.uu.nl/~roland/motion_planning/benchmarks.html
Geraerts, R. J. (2006). Sampling-based Motion Planning: Analysis and Path Quality. [Doctoral thesis 2 (Research NOT UU / Graduation UU), Utrecht University].
https://dspace.library.uu.nl/bitstream/handle/1874/8771/geraerts.jpg?sequence=2

2005

Wetenschappelijke publicaties

Geraerts, R. J., & Overmars, M. H. (2005). Creating small roadmaps for solving motion planning problems. In Proc. 11th IEEE International Conference on Methods and Models in Automation and Robotics (pp. 531-536)
https://dspace.library.uu.nl/bitstream/handle/1874/31844/smallGraphs.pdf?sequence=2
Geraerts, R. J., & Overmars, M. H. (2005). On Improving the Clearance for Robots in High-Dimensional Configuration Spaces. (UU-CS ed.) UU WINFI Informatica en Informatiekunde.
https://dspace.library.uu.nl/bitstream/handle/1874/24137/geraerts_05_clearanceforrobots.pdf?sequence=1
Geraerts, R. J., & Overmars, M. H. (2005). On improving the clearance for robots in high-dimensional configuration spaces. In IEEE/RSJ International Conference on Intelligent Robots and Systems (pp. 4075-4079) http://people.cs.uu.nl/roland/motion_planning/clearance2.html
Geraerts, R. J., & Overmars, M. H. (2005). On the Analysis and Success of Sampling Based Motion Planning. In Conference of the Advanced School for Computing and Imaging (pp. 313-319) http://people.cs.uu.nl/roland/motion_planning/reachability.html

2004

Wetenschappelijke publicaties

Geraerts, R. J., & Overmars, M. H. (2004). Clearance Based Path Optimization for Motion Planning. In IEEE Int. Conf. on Robotics and Automation (pp. 2386-2392)
https://dspace.library.uu.nl/bitstream/handle/1874/15751/geraerts_04_clearance_based_path.pdf?sequence=1
Geraerts, R. J., & Overmars, M. H. (2004). On Improving the Path Quality for Motion Planning. In Conference of the Advanced School for Computing and Imaging (ASCI) (pp. 211-217)
Geraerts, R. J., & Overmars, M. H. (2004). Sampling Techniques for Probabilistic Roadmap Planners. In Conference on Intelligent Autonomous Systems (pp. 600-609)

2003

Wetenschappelijke publicaties

Geraerts, R. J., & Overmars, M. H. (2003). Clearance Based Path Optimization for Motion Planning. (UU-CS ed.) Utrecht University: Information and Computing Sciences.
https://dspace.library.uu.nl/bitstream/handle/1874/23992/gerearts_03_clearancebased.pdf?sequence=1
Geraerts, R. J., & Overmars, M. H. (2003). Sampling Techniques for Probabilistic Roadmap Planners. (UU-CS ed.) Utrecht University: Information and Computing Sciences.
https://dspace.library.uu.nl/bitstream/handle/1874/23994/geraerts_03_samplingtechniques.pdf?sequence=1
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 Springer.
https://dspace.library.uu.nl/bitstream/handle/1874/40032/compare.pdf?sequence=1

2002

Wetenschappelijke publicaties

Geraerts, R. J., & Overmars, M. H. (2002). A Comparative Study of Probabilistic Roadmap Planners. In Proceedings Workshop on the Algorithmic Foundations of Robotics (WAFR)

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