Interactive constraint-based alignment objects

Details Interactive constraint-based alignment objects Interactive constraint-based alignment objects

2004-09-29

2009-11-24

Johnson, M Good (Department: 2628)

Computer graphics processing and selective visual display system

Computer graphics processing

Three-dimension

C345S619000, C345S418000

Reexamination Certificate

active

07623128

ABSTRACT:
A computer-implemented graphics system for creating and editing interactive constraint-based alignment objects. One or more drawing entities are created in the graphics system, wherein the drawing entities are linked together as an alignment object, and one or more of the entities includes a persistent tangency rule. The drawing entities comprise lines, arcs and/or spirals, although other entities are possible. The drawing entities are then edited in the graphics system, wherein the persistent tangency rules affect the drawing entities' geometry while the drawing entities are being edited. The persistent tangency rule comprises: (1) no tangency, (2) tangency to an entity before or after, or (3) tangency to an entity before and after.

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