NDLI: Time and Space Coherent Occlusion Culling for Tileable Extended 3D Worlds

Content Provider	IEEE Xplore Digital Library
Author	Gomez, D. Paulin, M. Vanderhaeghe, D. Poulin, P.
Copyright Year	2013
Description	Author affiliation: Dept. I.R.O., Univ. de Montreal, Montreal, QC, Canada (Poulin, P.) \|\| IRIT, Univ. Toulouse III, Toulouse, France (Gomez, D.; Paulin, M.; Vanderhaeghe, D.)
Abstract	In order to interactively render large virtual worlds, the amount of 3D geometry passed to the graphics hardware must be kept to a minimum. Typical solutions to this problem include the use of potentially visible sets and occlusion culling, however, these solutions do not scale well, in time nor in memory, with the size of a virtual world. We propose a fast and inexpensive variant of occlusion culling tailored to a simple tiling scheme that improves scalability while maintaining very high performance. Tile visibilities are evaluated with hardware-accelerated occlusion queries, and in-tile rendering is rapidly computed using BVH instantiation and any visibility method, we use the CHC++ occlusion culling method for its good general performance. Tiles are instantiated only when tested locally for visibility, thus avoiding the need for a preconstructed global structure for the complete world. Our approach can render large-scale, diversified virtual worlds with complex geometry, such as cities or forests, all at high performance and with a modest memory footprint.
Starting Page	1
Ending Page	8
File Size	787080
Page Count	8
File Format	PDF
ISBN	9781479925766
DOI	10.1109/CADGraphics.2013.9
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2013-11-16
Publisher Place	China
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	visibility tiling occlusion culling PVS CHC++ Geometry Three-dimensional displays procedural modeling Tiles BVH Coherence Cities and towns Rendering (computer graphics) Prediction algorithms
Content Type	Text
Resource Type	Article

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