[vtkusers] vtkTransformFilter is broken in vtk4.2.1 ?

[Steve Kirstukas]

There seems to be a difference in the way fields are handled by the transform
filter between vtk4.0 and 4.2.1.  

Here is some code that looks at the field before and after the transform (which
is just the identity matrix)....

/////// code ////////

    aTransform->Print( cout );
    uGrid->GetFieldData()->Print( cout );

    vtkTransformFilter *transFilter = vtkTransformFilter::New();
        transFilter->SetInput( uGrid );
        transFilter->SetTransform( aTransform );
        transFilter->Update();

    transFilter->GetUnstructuredGridOutput()->GetFieldData()->Print( cout );

/////// end of code ////////

If I build with vtk4.0, no problem - the field is there after the transform...

vtkTransform (0x1049ec50)
  Debug: Off
  Modified Time: 2
  Reference Count: 1
  Registered Events: (none)
  Inverse: (0x0)
  Matrix: (0x1049ed70)
    Debug: Off
    Modified Time: 857
    Reference Count: 1
    Registered Events: (none)
    Elements:
        1 0 0 0 
        0 1 0 0 
        0 0 1 0 
        0 0 0 1 
  Input: (0x0)
  InverseFlag: 0
  NumberOfConcatenatedTransforms: 0
  DoublePoint: ( 0, 0, 0, 0)
  Point: ( 0, 0, 0, 0)

vtkFieldData (0x104a93f0)
  Debug: Off
  Modified Time: 853
  Reference Count: 1
  Registered Events: (none)
  Number Of Arrays: 3
  Array 0 name = total-pressure
  Array 1 name = density
  Array 2 name = velocity-magnitude
  Number Of Components: 3
  Number Of Tuples: 20

vtkFieldData (0x104ab6a8)
  Debug: Off
  Modified Time: 1126
  Reference Count: 1
  Registered Events: (none)
  Number Of Arrays: 3
  Array 0 name = total-pressure
  Array 1 name = density
  Array 2 name = velocity-magnitude
  Number Of Components: 3
  Number Of Tuples: 20



But if I build with vtk4.2.1, the field is lost...

vtkTransform (0x10493f80)
  Debug: Off
  Modified Time: 2
  Reference Count: 1
  Registered Events: (none)
  Inverse: (0x0)
  Matrix: (0x10496860)
    Debug: Off
    Modified Time: 1619
    Reference Count: 1
    Registered Events: (none)
    Elements:
        1 0 0 0 
        0 1 0 0 
        0 0 1 0 
        0 0 0 1 
  Input: (0x0)
  InverseFlag: 0
  NumberOfConcatenatedTransforms: 0
  DoublePoint: ( 0, 0, 0, 0)
  Point: ( 0, 0, 0, 0)

vtkFieldData (0x104b7ee8)
  Debug: Off
  Modified Time: 1589
  Reference Count: 1
  Registered Events: (none)
  Number Of Arrays: 3
  Array 0 name = total-pressure
  Array 1 name = density
  Array 2 name = velocity-magnitude
  Number Of Components: 3
  Number Of Tuples: 20

vtkFieldData (0x104cc550)
  Debug: Off
  Modified Time: 2121
  Reference Count: 1
  Registered Events: (none)
  Number Of Arrays: 0
  Number Of Components: 0
  Number Of Tuples: 0

Do I have to do anything different in vtk4.2.1 to prevent losing the field?
Thanks, Steve