Constructs a new instance of a class used to calculate extrusions from BimRv geometry.

Specifies whether the .NET object represents a valid BimRv entity.
/returns: True if the object holds a valid object, false otherwise.

The custom axis to try (if extrusionAxes includes an option for a custom direction).

The extrusion axes to try when doing the calculation.

The scaling factor for length measurements from the default BimRv units to the export units.