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Summary: 1
Appeared: IEEE Visualization '97, pp. 355-362, Oct 19-24, 1997.
Architectural Walkthroughs Using Portal Textures
Daniel G. Aliaga, Anselmo A. Lastra
Department of Computer Science
University of North Carolina at Chapel Hill
{ aliaga | lastra } @cs.unc.edu
ABSTRACT
This paper outlines a method to dynamically replace
portals with textures in a cell-partitioned model. The
rendering complexity is reduced to the geometry of the
current cell thus increasing interactive performance. A
portal is a generalization of windows and doors. It
connects two adjacent cells (or rooms). Each portal of the
current cell that is some distance away from the
viewpoint is rendered as a texture. The portal texture
(smoothly) returns to geometry when the viewpoint gets
close to the portal. This way all portal sequences (not too
close to the viewpoint) have a depth complexity of one.
The size of each texture and distance at which the
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