[vtkusers] Re: vtkTransformFilter is broken in vtk4.2.1 ?

[Steve Kirstukas]

Doug, Regardless of how I write the unstructured grid, I get no field data.  The
field is lost after the transform so there is nothing left to write.  I haven't
delved into the code beyond adding the Print() statements to demonstrate the
issue.  So at this point, I don't know where the field is lost.  In vtk 4.0 the
field was passed through the filter unaltered.  In vtk 4.2.1, the field does not
survive the filter.  I am hoping that kitware will let me know whether this is
as intended or a bug before i delve deep into the vtk 4.2.1 code.
Thanks, Steve

> To: vtkusers at public.kitware.com
> From: Doug McCorkle <mccdo at iastate.edu>
> Date: Thu, 6 Mar 2003 10:25:27 -0600 (CST)
> Subject: [vtkusers] Re: vtkTransformFilter is broken in vtk4.2.1 ?
> 
> Steve, 
>      Is the field data affected by both binary and ascii format? Also, does 
> the field data disappear when passing it through other filters?
> Doug
> 
> > Message: 14
> > To: vtkusers at public.kitware.com
> > From: Steve Kirstukas <sjk60 at iastate.edu>
> > Date: Wed, 5 Mar 2003 15:14:10 -0600 (CST)
> > Subject: [vtkusers] vtkTransformFilter is broken in vtk4.2.1 ?
> > 
> > 
> > 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