Los Angeles, CA, USA
March 22, 2003 to March 26, 2003
Peter Willemsen , University of Utah
Joseph K. Kearney , University of Iowa
Hongling Wang , University of Iowa
This paper presents a real-time database modeling complex networks of intersecting roads and walkways in urban virtual environments. The database represents information about the layout of streets and sidewalks, the rules that govern behavior on roads and walkways, and the locations of agents with respect to road and sidewalk structures. This information is used by programs that control the behavior of autonomous vehicles and pedestrians populating the virtual urban environment. Roads and sidewalks are modeled as ribbons in space. The ribbon structure provides a natural coordinate frame for defining the local geometry of navigable surfaces. This geometry is important for way finding and also forms the geometric basis on which spatial relationships among agents are defined. The database includes a powerful run-time interface supported by robust and efficient code for locating objects on the ribbon network, for mapping between Cartesian and ribbon coordinates, and for determining behavioral constraints imposed by the environment.
Peter Willemsen, Joseph K. Kearney, Hongling Wang, "Ribbon Networks for Modeling Navigable Paths of Autonomous Agents in Virtual Urban Environments", VR, 2003, Proceedings IEEE Virtual Reality 2003, Proceedings IEEE Virtual Reality 2003 2003, pp. 79, doi:10.1109/VR.2003.1191124