Hybrid CPU/GPU KD-Tree Construction for Versatile Ray Tracing

Jean-Patrick Roccia, Mathias Paulin, Christophe Coustet
IRIT – Universite de Toulouse, France
Eurographics Symposium on Rendering (EUROGRAPHICS), 2012


   title={Hybrid CPU/GPU KD-Tree Construction for Versatile Ray Tracing},

   author={Roccia, J.P. and Paulin, M. and Coustet, C.},

   booktitle={Eurographics Symposium on Rendering, Cagliari, Italy},



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We propose an hybrid CPU-GPU ray-tracing implementation based on an optimal Kd-Tree as acceleration structure. The construction and traversal of this KD-tree takes benefit from both the CPU and the GPU to achieve high-performance ray-tracing on mainstream hardware. Our approach, flexible enough to use only a single computing unit (CPU or GPU), is able to efficiently distribute workload between CPUs and GPUs for fast KD-tree construction and traversal.
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