The Randomized Sample Tree: A Data Structure for Externally Stored Virtual Environments

Beitrag in einer Fachzeitschrift

Details zur Publikation

Autorinnen und Autoren: Meyer auf der Heide F, Fischer M, Krokowski J, Klein J, Wanka R, Wand M
Zeitschrift: Presence-Teleoperators and Virtual Environments
Verlag: Massachusetts Institute of Technology Press (MIT Press): STM Titles
Jahr der Veröffentlichung: 2004
Band: Vol. 13, No. 6, The MIT Press
Heftnummer: 6
Seitenbereich: 617-637
ISSN: 1054-7460
Sprache: Englisch


We present a new data structure for rendering highly complex virtual environments of arbitrary topology. The special feature of our approach is that it allows an interactive navigation in very large scenes (30 GB/400 million polygons in our benchmark scenes) that cannot be stored in main memory, but only on a local or remote hard disk. Furthermore, it allows interactive rendering of substantially more complex scenes by instantiating objects. The sampling process is done in the preprocessing. There, the polygons are randomly distributed in our hierarchical data structure, the randomized sample tree. This tree uses only space that is linear in the number of polygons. In order to produce an approximate image of the scene, the tree is traversed and polygons stored in the visited nodes are rendered. During the interactive walk-through, parts of the sample tree are loaded from a local or remote hard disk. We implement our algorithm in a prototypical walk-through system. Analysis and experiments show that the quality of our images is comparable to images computed by the conventional z-buffer algorithm regardless of the scene topology. © 2005 by the Massachusetts Institute of Technology.

FAU-Autorinnen und Autoren / FAU-Herausgeberinnen und Herausgeber

Wanka, Rolf Prof. Dr.
Professur für Informatik (Effiziente Algorithmen und Kombinatorische Optimierung)

Einrichtungen weiterer Autorinnen und Autoren

Eberhard Karls Universität Tübingen
Universität Paderborn


Meyer auf der Heide, F., Fischer, M., Krokowski, J., Klein, J., Wanka, R., & Wand, M. (2004). The Randomized Sample Tree: A Data Structure for Externally Stored Virtual Environments. Presence-Teleoperators and Virtual Environments, Vol. 13, No. 6, The MIT Press(6), 617-637.

Meyer auf der Heide, Friedhelm, et al. "The Randomized Sample Tree: A Data Structure for Externally Stored Virtual Environments." Presence-Teleoperators and Virtual Environments Vol. 13, No. 6, The MIT Press.6 (2004): 617-637.


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