Using ancillary geometry for visibility determination
US6731304B2 · kind B2 · utility
39Cited by
1References
29Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 6, 2001 |
| Grant date | May 4, 2004 |
| Priority date | — |
| Expiry date | Apr 28, 2022 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06T15/40
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A system and method for determining graphical object visibility by utilizing ancillary geometry. When comparing visibility cones with bounding hulls of scene graph hierarchy leaf nodes, ancillary geometry may be used in place of the bounding hulls and the leaf node's actual geometry. The ancillary geometry may be created through a manual process, or by an automated decimation process. The ancillary geometry may be a simplistic analytic surface (e.g., a sphere or a cylinder), a NURB surface, a collection of polygons, or a combination of surfaces and polygons.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.