Ray tracing animated scenes using coherent grid traversal

  • Authors:
  • Ingo Wald;Thiago Ize;Andrew Kensler;Aaron Knoll;Steven G. Parker

  • Affiliations:
  • University of Utah;University of Utah;University of Utah;University of Utah;University of Utah

  • Venue:
  • ACM SIGGRAPH 2006 Papers
  • Year:
  • 2006

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Abstract

We present a new approach to interactive ray tracing of moderate-sized animated scenes based on traversing frustum-bounded packets of coherent rays through uniform grids. By incrementally computing the overlap of the frustum with a slice of grid cells, we accelerate grid traversal by more than a factor of 10, and achieve ray tracing performance competitive with the fastest known packet-based kd-tree ray tracers. The ability to efficiently rebuild the grid on every frame enables this performance even for fully dynamic scenes that typically challenge interactive ray tracing systems.