System of relational entities for object-oriented computer-aided

Details System of relational entities for object-oriented computer-aided System of relational entities for object-oriented computer-aided

1997-05-05

1999-01-05

Ba, Huynh

Computer graphics processing and selective visual display system

Computer graphics processing

Three-dimension

345326, 345441, 345964, 706919, G06F 1500

Patent

active

058568280

ABSTRACT:
Geometric objects including points, lines, curves, surfaces and solids are defined and constructed in a system which retains and utilizes relationships and dependencies between objects in a directed graph (digraph) data structure. The primary advantage is automatic updating of the model, preserving dependencies, when an underlying object is changed. Multiple types of parametric curves and surfaces and multiple levels of dependency are easily supported through a recursive program structure. Difficulties of surface-surface intersection and trimming are largely avoided by provision of novel entities which permit construction of accurate and durable joins between surface objects.

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