Three dimensional geometric modeling system
US6392645B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 15, 1999 |
| Grant date | May 21, 2002 |
| Priority date | — |
| Expiry date | Mar 15, 2019 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06T2219/2021
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A computer program product and system executing/implementing the same provides a visual depiction of a three dimensional object upon a display device. The program converts feature-based data structure of a designated solid shape to a direct face data structure of the designated solid shape in a manner to keep a history of the three dimensional object consistent with a resulting boundary representation component of the three dimensional object. In converting the feature-based data structure of the designated solid shape to the direct face data structure, the program (1) determines what other solid shapes should be included in the D-Shape; (2) generates a boundary representation for the designated solid shape; (3) uses a topology-changeable local operation to generate a modified boundary representation for the designated solid shape; (4) modifies the history of the three dimensional object; (5) includes the modified boundary representation for the designated solid shape with the data structure for the solid shape; and (6) updates at least part of a history of the three dimensional object. Further, the program product can reconstruct a feature-based data structure from a direct face d…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.