Billboard clouds for extreme model simplification

Author:

Décoret Xavier1,Durand Frédo1,Sillion François X.2,Dorsey Julie3

Affiliation:

1. MIT LCS

2. Artis INRIA

3. Yale University

Abstract

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.

Publisher

Association for Computing Machinery (ACM)

Subject

Computer Graphics and Computer-Aided Design

Reference48 articles.

1. Smooth transitions in texture-based simplification

2. CGAL library. http://www.cgal.org. CGAL library. http://www.cgal.org.

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