I have a vtkBox with a transform set.
However, the transform never seems to be applied to the input points. Here is the code so you can see for yourself:
import vtk
box_origin = [420, 69, 420.69]
T = vtk.vtkTransform()
T.Translate(box_origin)
box = vtk.vtkBox()
box.SetXMin([0,0,0])
box.SetXMax([1,1,1])
box.SetTransform(T.GetInverse())
# implicit function should now be translated to box_origin
# input points should now be translated before evaluating the function
pt = [420, 69, 420.69]
# pt should be translated to origin, resulting in function value of 0
val = box.EvaluateFunction(pt)
# val != 0
# val ends up being as if the transform was never applied to the points.
# i.e. val = norm(pt - 1) != 0
print(val)