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:
Feb. 27, 2001
Filed:
Dec. 03, 1998
Applicant:
Inventor:
Harold Dee Gardiner, Sandy, UT (US);
Assignee:
Evans & Sutherland Computer Corporation, Salt Lake City, UT (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G06F 1/500 ;
U.S. Cl.
CPC ...
G06F 1/500 ;
Abstract
A method for rendering large-area time-based shadows. A first step is to pre-process a database of three dimensional constructs that define all primitives and attributes of the primitives in a three dimensional simulated environment. The pre-processing step determines the time relevant behavior of the shadows by calculating an angle at which the primitive is illuminated, and an angle at which illumination ceases. The second step is to process the database at run-time using the pre-processed database of three dimensional constructs and pre-calculated illumination and no-illumination angles.