This information is for people working with
vtkScalarBarActor
vtkScalarBarWidget
vtkScalarBarRepresentation
My experiments indicate that if you want to change the orientation, then you must call
vtkScalarBarRepresentation::SetOrientation()
before you call
vtkScalarBarRepresentation::SetPosition()
vtkScalarBarRepresentation::SetPosition2()
If you set the orientation after calling SetPosition() and SetPosition2() the results look terrible.