Method and apparatus for generating and manipulating graphical d

Details Method and apparatus for generating and manipulating graphical d Method and apparatus for generating and manipulating graphical d

1992-05-12

1994-04-26

Herndon, Heather R.

395133, 395138, 395164, G06F 1562

Patent

active

053074513

ABSTRACT:
Graphical data are generated and manipulated for display on computer display devices. In the method of the present invention, all graphical images are maintained as a set of base geometries to which all geometrical operations will be applied. The encapsulation of the geometry is referred as a shape and shapes may be aggregated into objects called pictures. Geometrical operations will be performed at all times on the geometries in a local space, while further in the hierarchy the results of these operations will be rendered for whatever display device is being used in a hierarchical output method. Caches are maintained for geometry calculations such that regardless of the resolution of the output display, calculations need only be done once and geometric information is not lost as a result of bitmap processing.

REFERENCES:
patent: 4622545 (1986-11-01), Atkinson
patent: 4821214 (1989-04-01), Sederberg
patent: 4873652 (1989-10-01), Pilat et al.

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