A NullRegion is a RegionRegion with no bounds. If the NegatedNegated 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 containing all points within the coordinate system.
If supplied, the uncertainty Region must be of a class for which all instances are centro-symetric (e.g. BoxBox, CircleCircle, EllipseEllipse, etc.) or be a PrismPrism containing centro-symetric component Regions. A deep copy of the supplied Region will be taken, so subsequent changes to the uncertainty Region using the supplied pointer will have no effect on the created Box. Alternatively, a NULL ObjectObject pointer may be supplied, in which case a default uncertainty of zero is used.