Method and apparatus for decomposing a quadrilateral figure for display and manipulation by a computer system
US5020002A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Dec 20, 1988 |
| Grant date | May 28, 1991 |
| Priority date | — |
| Expiry date | Dec 20, 2008 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06T11/40
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A circuit for decomposing a graphic figure to be displayed by a computer output display into pairs of line segments which line segments outline the figure comprising apparatus for providing signals indicative of the vertices of a figure to be displayed, apparatus for providing comparisons of the relative positions of such vertices as they are to be displayed, apparatus for selecting a starting vertex for determining the line segments which include common scan lines, apparatus for selecting a first line segment connected to the starting vertex, apparatus for selecting a second line segment connecting to the starting vertex; and apparatus for providing output signals indicative of line segments selected.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.