Roll-back during regeneration on a computer-aided design system

Details Roll-back during regeneration on a computer-aided design system Roll-back during regeneration on a computer-aided design system

1995-10-12

1998-12-15

Teska, Kevin J.

Computer graphics processing and selective visual display system

Display driving control circuitry

Controlling the condition of display elements

345433, 345418, 345420, G06F 1750, G06F 1730

Patent

active

058505350

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.

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Kefer, W. et al: "Mapping a Version Model to a Complex-Object Data Model"; 1992, pp. 348-357:Eighth International Conference on Data Engineering (Cat. No. 92CH3097-3).
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European Search Report for EP 96 40 1889, dated Jan. 29, 1998.

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