Terrain representation with polygonal seams
US5949425A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Nov 25, 1997 |
| Grant date | Sep 7, 1999 |
| Priority date | — |
| Expiry date | Nov 25, 2017 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06T17/20
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A method for generating a graphical representation for two or more graphical entities that may be displayed at different levels of representation (e.g. resolutions) is described. A first tile is generated. Two or more representations for an interior region adjacent to an edge of the first tile ("seam representations") are generated. Each seam representation has the same peripheral shape (i.e. occupies the same region within the first tile), but a different interior configuration. A first representation of the interior region adjacent to the edge ("first seam representation") is displayed when an adjacent second tile is displayed adjacent to the edge. A second representation of the interior region ("second seam representation") is displayed when a third adjacent tile is displayed adjacent to the edge. The second adjacent tile may be associated with a level of detail that differs from the third adjacent tile. The first seam representation and the second seam representation are both formed of polygons. The vertices on the edge of polygons in each seam representation are shared by the vertices of the polygons in the respective adjacent tiles.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.