Dynamics Modeling and Culling

emsintovirtualenvironments,whileabstracting the modeling process as much as possible. To achieve efficiency,weconcentrateoncullingdynamicalsystems: if the system is not in view, we do not compute any dynamics for it. As a concrete example of the benefits of culling, consider a museum of kinetic sculpture (such as mobiles). Such a world has a large number of dynamic objects-the exhibits--placed in mutually nonvisible rooms. Traditional dynamic simulation requires computing the motionofallthesculpturesoneveryframe,evenifsome sculptures aren't visible to the viewer. Naturally, this would severely limit the size of the museum. Culling avoids dynamic state computation for the exhibits not in view, just as geometry culling avoids rendering their geometry. Exploiting culling allows the museum to be arbitrarily large, provided only a few rooms are visible at once. Similar examples occur in factory simulations or dense city environments. In this article we describe three tools that togethe...

• Type: Journal
• Year: 1999
• Where: CGA
• Authors: Stephen Chenney, Jeffrey Ichnowski, David A. Forsyth
• Keywords: CGA 1999, Computational Geometry, Culling, Dynamic Objects-the Exhibits, Dynamical Systems