Elliptical arc generator for display systems
US4941116A · kind A · utility
3Cited by
3References
23Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jul 15, 1988 |
| Grant date | Jul 10, 1990 |
| Priority date | — |
| Expiry date | Jul 15, 2008 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F2101/04
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A symbol generator useful for stroke based and raster display systems provides the ability of generating ellipses and elliptical arc segments. A look-up table provides cosine and sine values for incremental angles which are multiplied by major and minor axis scale factors for a selected ellipse. Global input parameters permit rotation of all arcs and vectors to generate orthogonal projections, thereby producing 2-D and 3-D symbology.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.