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AST_NEGATE - Negate the area represented by a Region

Description:
This function negates the area represented by a Region. That is, points which were previously inside the region will then be outside, and points which were outside will be inside. This is acomplished by toggling the state of the Negated attribute for the supplied region.
Invocation:
CALL AST_NEGATE( THIS, STATUS )
Arguments:
THIS = INTEGER (Given)
Pointer to the Region.
STATUS = INTEGER (Given and Returned)
The global status.


next up previous 264
Next: AST_NORM - Normalise a set of Frame coordinates
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AST A Library for Handling World Coordinate Systems in Astronomy
Starlink User Note 210
R.F. Warren-Smith & D.S. Berry
24th May 2011
E-mail:ussc@star.rl.ac.uk

Copyright (C) 2009 Science \& Technology Facilities Council