Using Graphics Hardware to Speed-up Visibility Queries
Abstract
We present a visibility method that takes advantage of the graphics hardware to give fast answers to visibility queries. Our visibility method is designed to solve two types of visibility queries: point-based visibility queries, where several visibility queries share the same origin, and plane- based visibility queries, where several visibility queries have their origins on the same plane. Both occur frequently in global illumination algorithms. Combining the speed given by graphics hardware with a software heuristic to avoid reliability problems, our visibility method is signicantly faster than ray-casting, and still gives the same results.
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