Method for generating and applying changes in the level of detail of a polygonal surface
US6307551A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jan 14, 1998 |
| Grant date | Oct 23, 2001 |
| Priority date | — |
| Expiry date | Jan 14, 2018 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06T17/20
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A computer implemented method is disclosed for increasing the level of detail of a polygonal surface. A first step of the method provides data in a memory of a computer (50) for representing a polygonal surface that is defined at least by a plurality of vertices, triangles and edges. Further steps of the method include providing a list of marked edges; cutting through the marked edges thereby creating new boundary vertices; applying displacements to the new boundary vertices thereby generating at least one hole in the surface, the hole being bounded by the displaced new boundary vertices; and filling the at least one hole with a forest of triangles. The step of providing data for representing the polygonal surface preferably includes a step of appending artificial vertices and triangles to the polygonal surface to fill potential boundary holes; and then subsequently removing or ignoring the artificial vertices and triangles when rendering the surface for display. Also disclosed is an improved data structure for representing a polygonal surface. The data structure is composed of a surface description containing a list of vertices and a list of triangles, said further includes data f…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.