Gennady D Maystrovsky

US Patent:

20050248562, Nov 10, 2005

Filed:

May 4, 2004

Appl. No.:

10/839033

Inventors:

Gennady Maystrovsky - Brookline MA, US
Byungwook Kwon - Acton MA, US
Chun-Yi Hu - Lexington MA, US

International Classification:

G06T017/00
G06T015/00

US Classification:

345419000

Abstract:

Deforming a three-dimensional target model using a three-dimensional tool model to cause a change of shape of the target model includes selecting the three-dimensional tool model whereby the tool model representing an archetype of a shape to impress upon the three-dimensional target model, and deforming the target model in accordance with a surface deformation procedure that produces a smoothed shape of the tool model in a region of the target model.

US Patent:

58505350, Dec 15, 1998

Filed:

Oct 12, 1995

Appl. No.:

8/542453

Inventors:

Gennady D. Maystrovsky - Brookline MA
Timothy Friedman - Lexington MA

Assignee:

Computervision Corporation - Bedford MA

International Classification:

G06F 1750
G06F 1730

US Classification:

395500

Abstract:

A method and apparatus that keeps information on all entities that are created when a model is built in a CAD system, including an indication of which command causes each entity to be added to or taken from the model. From this information, the system can determine the state of the model at any given time during its creation, without having to regenerate commands that generated the model at the determined state. For each new command, only those entities that are newly created are added to the database. The entities each have a version field that allows the same data to relate to different versions of the model.