Method and apparatus for rendering vectors using bresenham parameters
CA 1302597 C · Owner: Evans, Jerald R. · Inventors: Shantz, Michael J.; Evans, Jerald R.; Carrie, Susan E.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An adaptive forward differencing apparatus is disclosed wherein, when rendering curves calculated x, y values, are increased or decreased in order to create values which correspond to the next pixel or the display CRT such that curves, of substantially one pixel increments are continuously and uniformly generated. The apparatus of the present invention also provides circuitry for generating coordinates or display elements which approximate an ideal vector and to define curves vectors, or objects within maximum and minimum coordinates of the CRT display. The present invention also provides efficient circuitry for computing the value or 1/w of the homogenous coordinate w.
Read the whole patent
Listed from its CIPO record in Patent Yard's archive of Canadian patents past their term. Its claims, description and drawings are in the CIPO record and on Google Patents, and the Claude kit works from them.
Why it's free to use
- Granted June 2, 1992. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended June 2, 2009.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
Timeline
Timeline From CIPO dates
Sources & verification
Official CIPO records
Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.