NDLI: Fast parallel construction of high-quality bounding volume hierarchies

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Fast parallel construction of high-quality bounding volume hierarchies

Content Provider	ACM Digital Library
Author	Aila, Timo Karras, Tero
Abstract	We propose a new massively parallel algorithm for constructing high-quality bounding volume hierarchies (BVHs) for ray tracing. The algorithm is based on modifying an existing BVH to improve its quality, and executes in linear time at a rate of almost 40M triangles/sec on NVIDIA GTX Titan. We also propose an improved approach for parallel splitting of triangles prior to tree construction. Averaged over 20 test scenes, the resulting trees offer over 90% of the ray tracing performance of the best offline construction method (SBVH), while previous fast GPU algorithms offer only about 50%. Compared to state-of-the-art, our method offers a significant improvement in the majority of practical workloads that need to construct the BVH for each frame. On the average, it gives the best overall performance when tracing between 7 million and 60 billion rays per frame. This covers most interactive applications, product and architectural design, and even movie rendering.
Starting Page	89
Ending Page	99
Page Count	11
File Format	PDF
ISBN	9781450321358
DOI	10.1145/2492045.2492055
Language	English
Publisher	Association for Computing Machinery (ACM)
Publisher Date	2013-07-19
Publisher Place	New York
Access Restriction	Subscribed
Subject Keyword	Bounding volume hierarchies Ray tracing
Content Type	Text
Resource Type	Article

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