Approximation of Catmull-Clark subdivision surfaces by Bezier patches
US6950099B2 · kind B2 · utility
34Cited by
7References
16Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jul 1, 2002 |
| Grant date | Sep 27, 2005 |
| Priority date | — |
| Expiry date | May 15, 2023 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06T17/30
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A method for converting a subdivision surface, such as a Catmull-Clark subdivision surface, into a cubic Bezier surface defined by sixteen control points. The method includes (a) converting a subdivision face to Bezier control points using a conversion matrix using fifteen points and a dummy value for an unavailable sixteenth point; and (b) replacing one of the Bezier control points which corresponds to an extraordinary point on the subdivision face with the extraordinary point's limit point.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.