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NullRegion - A boundless region within a Frame

Description:
The NullRegion class implements a Region with no bounds within a Frame. If the Negated attribute of a NullRegion is false, the NullRegion represents a Region containing no points. If the Negated attribute of a NullRegion is true, the NullRegion represents an infinite Region (that is, all points in the coordinate system are inside the NullRegion).
Constructor Function:
astNullRegion
Inheritance
The NullRegion class inherits from the Region class.
Attributes
The NullRegion class does not define any new attributes beyond those which are applicable to all Regions.
Functions
The NullRegion class does not define any new functions beyond those which are applicable to all Regions.


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Next: Object - Base class for all AST Objects
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AST A Library for Handling World Coordinate Systems in Astronomy
Starlink User Note 211
R.F. Warren-Smith & D.S. Berry
24th May 2011
E-mail:ussc@star.rl.ac.uk

Copyright (C) 2009 Science \& Technology Facilities Council