DRange3d
A DRange3d forms the box around the maximum and minimum X, Y, Z of a node. A new DRange3d is created from two values the High and the Low.
Contains(Point)
Contains(ref DPoint3d Point)
FromUnion(RangeA, RangeB)
FromUnion(ref DRange3d RangeA, ref DRange3d RangeB)