The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Aug. 05, 2014
Filed:
Jan. 18, 2011
Marco Salvi, San Francisco, CA (US);
Aaron Lefohn, Bothell, WA (US);
Andrew T. Lauritzen, Victoria, CA;
Kiril Vidimce, Saint Pete Beach, FL (US);
Marco Salvi, San Francisco, CA (US);
Aaron Lefohn, Bothell, WA (US);
Andrew T. Lauritzen, Victoria, CA;
Kiril Vidimce, Saint Pete Beach, FL (US);
Intel Corporation, Santa Clara, CA (US);
Abstract
A dynamic volumetric medium, such as hair, fog, or smoke, may be represented, for purposes of shadow mapping, by transmittance versus depth data for that medium. In one embodiment, the representation may take the form of a plot of transmittance versus depth, with nodes where the transmittance changes non-live linearly with respect of depth into the medium. The number of nodes in the representation may be reduced to reduce memory footprint and to enable the storage of the representation on the same chip doing the shadow mapping. In some embodiments, the number of nodes may be reduced, one node at a time, by removing the node whose underlying trapezoid has the least area of all the remaining nodes.