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    • Issue 3
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    Instant Visibility

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    Date
    2001
    Author
    Wonka, Peter ORCID
    Wimmer, Michael ORCID
    Sillion, Francois X.
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    Abstract
    We present an online occlusion culling system which computes visibility in parallel to the rendering pipeline. We show how to use point visibility algorithms to quickly calculate a tight potentially visible set (PVS) which is valid for several frames, by shrinking the occluders used in visibility calculations by an adequate amount. These visibility calculations can be performed on a visibility server, possibly a distinct computer communicating with the display host over a local network. The resulting system essentially combines the advantages of online visibility processing and region-based visibility calculations, allowing asynchronous processing of visibility and display operations. We analyze two different types of hardware-based point visibility algorithms and address the problem of bounded calculation time which is the basis for true real-time behavior. Our results show reliable, sustained 60 Hz performance in a walkthrough with an urban environment of nearly 2 million polygons, and a terrain flyover.
    BibTeX
    @article {10.1111:1467-8659.00534,
    journal = {Computer Graphics Forum},
    title = {{Instant Visibility}},
    author = {Wonka, Peter and Wimmer, Michael and Sillion, Francois X.},
    year = {2001},
    publisher = {Blackwell Publishers Ltd and the Eurographics Association},
    ISSN = {1467-8659},
    DOI = {10.1111/1467-8659.00534}
    }
    URI
    http://dx.doi.org/10.1111/1467-8659.00534
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