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:
Nov. 07, 2000
Filed:
Sep. 30, 1998
Applicant:
Inventor:
Kenneth Jamieson Hill, Plymouth Township, MI (US);
Assignee:
Autodesk, Inc., San Rafael, CA (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G06F / ;
U.S. Cl.
CPC ...
345355 ; 345433 ; 345419 ; 345427 ; 345135 ;
Abstract
A method, apparatus and article of manufacture for generating and rendering arrowheads that approximate the direction of the arrowhead. A base and an axis vector for the arrowhead are created, and a view direction vector, approximating the direction that a user of a computer is viewing the arrowhead, is determined. The angle between the axis vector and the view direction vector is calculated, and the arrowhead is displayed rotated by the angle between the view direction vector and the axis vector. Silhouette lines and portions of the base are selectively displayed depending on the angle that the arrowhead is viewed from.