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. 16, 1999
Filed:
Jan. 31, 1997
Bryan G Prouty, Wellington, CO (US);
Hewlett-Packard Co., Palo Alto, CA (US);
Abstract
A method and apparatus for displaying line rotation on a raster computer graphics display, so that substantially rotated versions of original lines maintain a line style pattern that is identical to a line style pattern of the original lines. The invention includes controlling the line style of the substantially rotated version based upon rotation of the substantially rotated version. A line style array is stored in a computer memory for storing consecutive line style pattern features of the substantially rotated version of the first line and assigning a respective length value to each of the pattern features. A line style feature pixel counter is used for counting the pixels of each line style pattern feature. A comparator is used for comparing the incremented pixel counter to the respective length value. A pixel step value is scaled based upon a trigonometric function of the rotation of the substantially rotated version so as to generate a scaled pixel step value. An incrementer is used for incrementing the pixel counter by the scaled pixel step value.