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:
Jan. 21, 1997
Filed:
Jul. 26, 1994
Applicant:
Inventor:
Martin Ashton, Berkhamstead, GB;
Assignee:
VideoLogic Limited, Kings Langley, GB;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G06T / ;
U.S. Cl.
CPC ...
395121 ; 395133 ; 395502 ;
Abstract
Each object in a 3-dimensional image to be displayed may be represented by a set of infinite surfaces. Each elementary area of a screen on which the image is to be displayed has a ray projected through it onto the 3-dimensional image. The location of the intersection of the projected ray with each surface is then determined and from these locations it is determined whether any intersected surface is visible at that elementary area. The elementary area is then shaded for display in dependence on the result of the determination.