visilib

The visilib project aims to provide an efficient C++ library for exact visibility computation in 3D. The main feature of the current version is exact occlusion query between two polygon, and allows to answer the question "Are these two polygons mutually visible?". The principal application is from-region occlusion culling and exact Potentially Visible Set computation (PVS). The visibility determination is exact and make no simplification, in opposition to conservative or aggressive visibility methods: visilib performs the complete penumbra fusion of the occluders, by the mean of CSG operations in Plücker space. All the technical details are described in the companion paper "A Low Dimensional Framework for Exact Polygon-to-Polygon Occlusion Queries", presented at EGSR 2005 (cf. download section) Visilib Extensions Visilib will be extended in the future, in order to provide a complete framework for exact visibility determination in 3D. The f