Title:	Extension of validity calculation to moving objects within a virtual reality system using frame to frame coherence
Authors:	Duckstein, Franz
Citation:	Journal of WSCG. 1998, vol. 6, no. 1-3, p. 81-87.
Issue Date:	1998
Publisher:	Václav Skala - UNION Agency
Document type:	článek article
URI:	http://hdl.handle.net/11025/15839
ISSN:	1213-6972 (print) 1213-6980 (CD-ROM) 1213-6964 (online)
Keywords:	počítačová grafika;animované objekty;virtuální realita;modelování
Keywords in different language:	computer graphics;animated objects;virtual reality;modelling
Abstract in different language:	Generating pictures of a complex scene in real-time with constant frame rates still overhelms modern rendering systems. The exploitation of frame to frame coherence proposes a solution to this problem by reusing the images of rendered objects multiple times. Combining this with a cost-metric and a LOD-system delivers a uniform frame rate system with less additional effort. The fundament of reusing images is a validity calculation, deciding in how far the original and the image might differ. The application is restricted to fixed objects respectively fixed spaces. This paper presents extensions for existing validity calculation to handle moving objects, which e. g. are now standard in the virtual reality description language VRML 2.0. The additional deviation resulting from object movement is estimated together with viewpoint movement.
Rights:	© Václav Skala - UNION Agency
Appears in Collections:	Volume 6, number 1-3 (1998)

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