This node defines a uniform 3D scale about the origin relative to the previously defined units. The default units for all data are meters. Adding a units node with the value
INCHES will have the same effect as
adding an
SoScale node with the
scaleFactor of (.0254, .0254, .0254). Any subsequent
SoUnits node will take the previous units into account. When building a composite object out of a bunch of pieces, it would be a good practice
to add an
SoUnits node at the beginning of each of the pieces, under an
SoSeparator node, to make sure all the pieces fit together with the same scale.