Publikation

Two-Level Grids for Ray Tracing on GPUs

Javor Kalojanov, Markus Billeter, Philipp Slusallek

In: Oliver Deussen, Min Chen (Hrsg.). EG 2011 - Full Papers. Eurographics (EG-11) April 11-15 Llandudno United Kingdom Seiten 307-314 Eurographics Association 2011.

Abstrakt

We investigate the use of two-level nested grids as acceleration structure for ray tracing of dynamic scenes. We propose a massively parallel, sort-based construction algorithm and show that the two-level grid is one of the structures that is fastest to construct on modern graphics processors. The structure handles non-uniform primitive distributions more robustly than the uniform grid and its traversal performance is comparable to those of other high quality acceleration structures used for dynamic scenes. We propose a cost model to determine the grid resolution and improve SIMD utilization during ray-triangle intersection by employing a hybrid packetization strategy. The build times and ray traversal acceleration provide overall rendering performance superior to previous approaches for real time rendering of animated scenes on GPUs.

Weitere Links

Deutsches Forschungszentrum für Künstliche Intelligenz
German Research Center for Artificial Intelligence