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A navigation mesh for dynamic environments


  • Supporting information may be found in the online version of this paper.

Roland Geraerts, Department of Information and Computing Sciences, Utrecht University, 3584 CC Utrecht, The Netherlands



Games and simulations frequently model scenarios where obstacles move, appear, and disappear in an environment. A city environment changes as new buildings and roads are constructed, and routes can become partially blocked by small obstacles many times in a typical day. This paper studies the effect of using local updates to repair only the affected regions of a navigation mesh in response to a change in the environment. The techniques are inspired by incremental methods for Voronoi diagrams. The main novelty of this paper is that we show how to maintain a 2D or 2.5D navigation mesh in an environment that contains dynamic polygonal obstacles. Experiments show that local updates are fast enough to permit real-time updates of the navigation mesh. Copyright © 2012 John Wiley & Sons, Ltd.