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:
Jul. 30, 1996
Filed:
Jan. 16, 1991
Applicant:
Inventor:
Andrew T Brown, Fort Collins, CO (US);
Assignee:
Hewlett-Packard Company, Palo Alto, CA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G06T / ;
U.S. Cl.
CPC ...
395122 ;
Abstract
A precision Z-interpolator for use in an interactive graphics system multiplies the line slope by a value f.sub.S in computing the first Z ordinate value. This eliminates the offset error in Z inherent in previously known interpolators. For extremely large slopes, the slope is not used directly in the computations. Instead the value used is (Z.sub.E -Z.sub.S)/(1+f.sub.E /f.sub.S) (see FIG. 4).