Title:	Bandwidth and memory efficiency in real-time ray tracing
Authors:	Lousada, Pedro Costa, Vasco Pereira, João M.
Citation:	Journal of WSCG. 2017, vol. 25, no. 1, p. 49-57.
Issue Date:	2017
Publisher:	Václav Skala - UNION Agency
Document type:	článek article
URI:	wscg.zcu.cz/WSCG2017/!_2017_Journal_WSCG-No-1.pdf http://hdl.handle.net/11025/26279
ISSN:	1213-6972 (print) 1213-6980 (CD-ROM) 1213-6964 (on-line)
Keywords:	sledování paprsku;hierarchie ohraničujících objemů;paralelizace;GPU;kvantování;paměť
Keywords in different language:	ray tracing;bounding volume hierarchy;parallelization;GPU;quantization;memory
Abstract in different language:	Real time ray tracing has been given a lot of attention in recent years in the academic and research community. Several novel algorithms have appeared that parallelize different aspects of the ray tracing algorithm through the use of a GPU. Among these, the creation of Bounding Volume Hierarchies (BVHs). We believe that recent approaches have failed to consider the performance impact of memory accesses in GPU and how their cost affects the overall performance of the application. In this work we show that by reducing memory bandwidth and footprint we are able to achieve significant improvements in BVH traversal times. We do this by compressing the BVH and the triangle mesh in a parallel manner after its creation, in each frame, and then decompressing it as needed while traversing the BVH.
Rights:	© Václav Skala - UNION Agency
Appears in Collections:	Volume 25, Number 1 (2017)

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