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Computational Visual Media

, Volume 1, Issue 2, pp 105–118 | Cite as

Subregion graph: A path planning acceleration structure for characters with various motion types in very large environments

  • Nicholas Mario Wardhana
  • Henry Johan
  • Hock Soon Seah
Open Access
Research Article

Abstract

Modern computer graphics applications commonly feature very large virtual environments and diverse characters which perform different kinds of motions. To accelerate path planning in such a scenario, we propose the subregion graph data structure. It consists of subregions, which are clusters of locally connected waypoints inside a region, as well as subregion connectivities. We also present a fast algorithm to automatically generate a subregion graph from an enhanced waypoint graph map representation, which also supports various motion types and can be created from large virtual environments. Nevertheless, a subregion graph can be generated from any graphbased map representation. Our experiments show that a subregion graph is very compact relative to the input waypoint graph. By firstly planning a subregion path, and then limiting waypoint-level planning to this subregion path, over 8 times average speedup can be achieved, while average length ratios remain as low as 102.5%.

Keywords

path planning acceleration very large environments motion types abstraction 

Supplementary material

41095_2015_18_MOESM1_ESM.pdf (2.3 mb)
Supplementary material, approximately 2.35 MB.
41095_2015_18_MOESM2_ESM.mp4 (49.5 mb)
Supplementary material, approximately 49.4 MB.

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Copyright information

© The Author(s) 2015

Authors and Affiliations

  • Nicholas Mario Wardhana
    • 1
    • 2
  • Henry Johan
    • 3
  • Hock Soon Seah
    • 1
    • 2
  1. 1.Multi-plAtform Game Innovation Centre (MAGIC)Nanyang Technological University, XFrontiers BlockSingaporeSingapore
  2. 2.School of Computer EngineeringNanyang Technological UniversitySingaporeSingapore
  3. 3.Fraunhofer IDM@NTUNanyang Technological UniversitySingaporeSingapore

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