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).

AST_NULLREGION

The NullRegion class inherits from the Region class.

The NullRegion class does not define any new attributes beyond those which are applicable to all Regions.

The NullRegion class does not define any new routines beyond those which are applicable to all Regions.