Partial guardband clipping
US7286139B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Sep 17, 2004 |
| Grant date | Oct 23, 2007 |
| Priority date | — |
| Expiry date | Apr 21, 2026 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06T15/30
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A method for rendering a visible portion of an image that includes a plurality of graphics primitives. The size of the graphics primitives may be large and require the use of floating point numbers to represent the vertices. When the graphics primitives have a common vertex that is visible, the edge functions for the primitive are computed so as to avoid the common vertex becoming different for the different primitives. If the other vertices of the graphics primitives lie outside a bounding rectangle, then a vertex is formed at the intersection of the bounding rectangle and the graphics primitive. Fixed point numbers for the common vertex and other vertices including intersection vertices are then used to compute edge functions of the primitive and the primitive is rendered using the edge functions. If the common vertex is not visible, then floating point numbers are used to compute the edge functions.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.