RaTrace: simple and efficient abstractions for BVH ray traversal algorithms

Author:

Pérard-Gayot Arsène1,Weier Martin2,Membarth Richard3,Slusallek Philipp3,Leißa Roland1,Hack Sebastian1

Affiliation:

1. Saarland University, Germany

2. Bonn-Rhein-Sieg University of Applied Sciences, Germany

3. DFKI, Germany

Abstract

In order to achieve the highest possible performance, the ray traversal and intersection routines at the core of every high-performance ray tracer are usually hand-coded, heavily optimized, and implemented separately for each hardware platform—even though they share most of their algorithmic core. The results are implementations that heavily mix algorithmic aspects with hardware and implementation details, making the code non-portable and difficult to change and maintain. In this paper, we present a new approach that offers the ability to define in a functional language a set of conceptual, high-level language abstractions that are optimized away by a special compiler in order to maximize performance. Using this abstraction mechanism we separate a generic ray traversal and intersection algorithm from its low-level aspects that are specific to the target hardware. We demonstrate that our code is not only significantly more flexible, simpler to write, and more concise but also that the compiled results perform as well as state-of-the-art implementations on any of the tested CPU and GPU platforms.

Funder

Bundesministerium für Bildung und Forschung

Seventh Framework Programme

Publisher

Association for Computing Machinery (ACM)

Subject

Computer Graphics and Computer-Aided Design,Software

Reference41 articles.

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1. CUDA-accelerated protein electrostatics in linear space;Journal of Computational Science;2023-06

2. Unified Code Generation for the Parallel Computation of Pairwise Interactions Using Partial Evaluation;2018 17th International Symposium on Parallel and Distributed Computing (ISPDC);2018-06

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