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Ray tracing a three dimensional scene using a grid

United States Patent

February 26, 2013
View the Complete Patent at the US Patent & Trademark Office
Ray tracing a three-dimensional scene using a grid. One example embodiment is a method for ray tracing a three-dimensional scene using a grid. In this example method, the three-dimensional scene is made up of objects that are spatially partitioned into a plurality of cells that make up the grid. The method includes a first act of computing a bounding frustum of a packet of rays, and a second act of traversing the grid slice by slice along a major traversal axis. Each slice traversal includes a first act of determining one or more cells in the slice that are overlapped by the frustum and a second act of testing the rays in the packet for intersection with any objects at least partially bounded by the one or more cells overlapped by the frustum.
Wald; Ingo (Salt Lake City, UT), Ize; Santiago (Salt Lake City, UT), Parker; Steven G. (Salt Lake City, UT), Knoll; Aaron (Sandy, UT)
The University of Utah Research Foundation (Salt Lake City, UT)
12/ 515,812
November 29, 2007
This invention was made with government support under Award 190 B524196 awarded by the United States Department of Energy. The Government has certain rights to this invention.