PLOCTree: A Fast, High-Quality Hardware BVH Builder

Timo Viitanen, Matias Koskela, Pekka Jääskeläinen, Aleksi Tervo, Jarmo Takala

    Tutkimustuotos: ArtikkeliTieteellinenvertaisarvioitu

    10 Sitaatiot (Scopus)
    776 Lataukset (Pure)

    Abstrakti

    In the near future, GPUs are expected to have hardware support for real-time ray tracing in order to, e.g., help render complex lighting effects in video games and enable photorealistic augmented reality. One challenge in real-time ray tracing is dynamic scene support, that is, rebuilding or updating the spatial data structures used to accelerate rendering whenever the scene geometry changes. This paper proposes PLOCTree, an accelerator for tree construction based on the Parallel Locally-Ordered Clustering (PLOC) algorithm. Tree construction is highly memory-intensive, thus for the hardware implementation, the algorithm is rewritten into a bandwidtheconomical form which converts most of the external memory traffic of the original software-based GPU implementation into streaming on-chip data traffic. As a result, the proposed unit is 3.9 times faster and uses 7.7 times less memory bandwidth than the GPU implementation. Compared to state-of-the-art hardware builders, PLOCTree gives a superior performance-quality tradeoff: it is nearly as fast as a state-of-the-art low-quality linear builder, while producing trees of similar Surface Area Heuristic (SAH) cost as a comparatively expensive binned SAH sweep builder.
    AlkuperäiskieliEnglanti
    Sivumäärä19
    JulkaisuProceedings of the ACM on Computer Graphics and Interactive Techniques
    Vuosikerta1
    Numero2
    DOI - pysyväislinkit
    TilaJulkaistu - 12 elok. 2018
    OKM-julkaisutyyppiA1 Alkuperäisartikkeli tieteellisessä aikakauslehdessä

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