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

[Doug McCorkle]

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