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:
May. 02, 2006
Filed:
May. 21, 2003
Michael Todd Bunnell, Pleasanton, CA (US);
Michael Todd Bunnell, Pleasanton, CA (US);
NVIDIA Corporation, Santa Clara, CA (US);
Abstract
Antialiasing shadows using a programmable graphics processor. Shadows are antialiased using dependent texture mapping to displace shadow map coordinates. A jitter texture is applied to an object in screen space using non-perspective corrected jitter texture coordinates. The jitter texture coordinates are used to read texture coordinate displacements stored as the jitter texture. The texture coordinate displacements are combined with the shadow, map coordinates to generate displaced shadow map coordinates. The displaced shadow map coordinates are used to read depth values stored as the shadow map. The depth values read from the shadow map are compared with corresponding depth values of the object in light source coordinate space to determine whether each fragment within the object is either 'in shadow' or 'out of shadow'.