Billboard clouds for extreme model simplification

We introduce billboard clouds -- a new approach for extreme simplification in the context of real-time rendering. 3D models are simplified onto a set of planes with texture and transparency maps. We present an optimization approach to build a billboard cloud given a geometric error threshold. After...

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Bibliographic Details
Published in:ACM transactions on graphics 2003-07, Vol.22 (3), p.689-696
Main Authors: Décoret, Xavier, Durand, Frédo, Sillion, François X., Dorsey, Julie
Format: Article
Language:English
Subjects:
3D imaging
Animation
Artificial intelligence
Computer graphics
Computer vision
Computing methodologies
Image and video acquisition
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Summary:We introduce billboard clouds -- a new approach for extreme simplification in the context of real-time rendering. 3D models are simplified onto a set of planes with texture and transparency maps. We present an optimization approach to build a billboard cloud given a geometric error threshold. After computing an appropriate density function in plane space, a greedy approach is used to select suitable representative planes. A good surface approximation is ensured by favoring planes that are "nearly tangent" to the model. This method does not require connectivity information, but instead avoids cracks by projecting primitives onto multiple planes when needed. For extreme simplification, our approach combines the strengths of mesh decimation and image-based impostors. We demonstrate our technique on a large class of models, including smooth manifolds and composite objects.
ISSN:0730-0301
1557-7368
DOI:10.1145/882262.882326