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MergeTree: a HLBVH Constructor for Mobile Systems

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Yksityiskohdat

AlkuperäiskieliEnglanti
OtsikkoSIGGRAPH Asia 2015 Technical Briefs
JulkaisupaikkaNew York, NY, USA
KustantajaACM
Sivumäärä4
ISBN (elektroninen)978-1-4503-3930-8
DOI - pysyväislinkit
TilaJulkaistu - 2 marraskuuta 2015
OKM-julkaisutyyppiA4 Artikkeli konferenssijulkaisussa
TapahtumaACM SIGGRAPH ASIA -
Kesto: 1 tammikuuta 1900 → …

Conference

ConferenceACM SIGGRAPH ASIA
Ajanjakso1/01/00 → …

Tiivistelmä

Powerful hardware accelerators have been recently developed that put interactive ray-tracing even in the reach of mobile devices. However, supplying the rendering unit with up-to date acceleration trees remains difficult, so the rendered scenes are mostly static. The restricted memory bandwidth of a mobile device is a challenge with applying GPU-based tree construction algorithms. This paper describes MergeTree, a BVH tree constructor architecture based on the HLBVH algorithm, whose main features of interest are a streaming hierarchy emitter, an external sorting algorithm with provably minimal memory usage, and a hardware priority queue used to accelerate the external sort. In simulations, the resulting unit is faster by a factor of three than the state-of-the art hardware builder based on the binned SAH sweep algorithm.

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