AGVS: Adaptive Global Visibility Sampling скачать в хорошем качестве

AGVS: Adaptive Global Visibility Sampling

Jiri Bittner, Oliver Mattausch, Peter Wonka, Vlastimil Havran and Michael Wimmer ACM Transactions on Graphics (Siggraph 2009) http://dcgi.felk.cvut.cz/home/bittner... In this paper we propose a global visibility algorithm which com- putes from-region visibility for all view cells simultaneously in a progressive manner. We cast rays to sample visibility interactions and use the information carried by a ray for all view cells it in- tersects. The main contribution of the paper is a set of adaptive sampling strategies based on ray mutations that exploit the spatial coherence of visibility. Our method achieves more than an order of magnitude speedup compared to per-view cell sampling. This provides a practical solution to visibility preprocessing and also en- ables a new type of interactive visibility analysis application, where it is possible to quickly inspect and modify a coarse global visibility solution that is constantly refined.