Method and apparatus for clipping polygons

Details Method and apparatus for clipping polygons Method and apparatus for clipping polygons

1989-06-09

1992-01-07

Harkcom, Gary V.

G06F 1572

Patent

active

050797190

ABSTRACT:
A standard polygon clipping algorithm is used to either trivially accept/reject the sides or clip the sides of a polygon. Then, for each side that cannot be trivially accepted/rejected nor clipped using the standard polygon clipping algorithm, at least one turning point is generated to replace the side by performing a Boolean operation using the region codings provided by the standard polygon clipping algorithm. As a result, the replacement turning points are generated using integer arithmetic.

REFERENCES:
patent: 3638736 (1972-02-01), Sutherland
patent: 3816726 (1974-06-01), Sutherland et al.
patent: 4181953 (1980-01-01), Osofsky
patent: 4958305 (1990-09-01), Plazza
Fundamentals of Interactive Computer Graphics Foley, Van Dam, p. 144, section 4.2.1.

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