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Faster ray tracing with SIMD shaft culling

Dmitriev, Kirill and Havran, Vlastimil and Seidel, Hans-Peter

December 2004, 13 pages.

Status: available - back from printing

This paper presents a generic technique for acceleration of ray tracing of polygonal scenes. We propose scheduling rays in a way that forms pyramidal shafts. We show that under certain conditions fulfilled by the corner rays of a shaft, it is possible to immediately and conservatively answer visibility queries for the inner rays without expensive ray traversal through acceleration data structures (kd-tree in our case). We show that the presented technique is suitable for primary, secondary, and shadow rays.

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  AUTHOR = {Dmitriev, Kirill and Havran, Vlastimil and Seidel, Hans-Peter},
  TITLE = {Faster ray tracing with SIMD shaft culling},
  TYPE = {Research Report},
  INSTITUTION = {Max-Planck-Institut f{\"u}r Informatik},
  ADDRESS = {Stuhlsatzenhausweg 85, 66123 Saarbr{\"u}cken, Germany},
  NUMBER = {MPI-I-2004-4-006},
  MONTH = {December},
  YEAR = {2004},
  ISSN = {0946-011X},