[vtkusers] Using vtkFieldData

[Berk Geveci]

Not currently. I have been thinking of doing a few different ways of
doing this but unfortunately I am swamped with the ParaView release to
implement any right now. Ping me in a few weeks :-)

On 10/11/05, John Norris <jnorris at mcs.anl.gov> wrote:
> Hi,
>
> I've using a vtkHierarchicalDataSet to represent my multi-block data.
> I'd like to preserve certain block-specific information (e.g. the
> block's text label), but haven't figured out a good way to do this yet.
>   I tried adding a vtkCharArray to the vtkFieldData of each of the
> component datasets, but this doesn't appear to be passed down the pipe.
>   I've tried a simple example using a regular vtkStructuredPoints, and
> it doesn't seem to pass along its vtkFieldData either.  A code snippet
> follows.
>
> Is there any way, other than converting the string to cell or point
> data, to get this data passed through filters?
>
> Thanks,
> John
>
>    vtkStructuredGrid* pStrGrid = vtkStructuredGrid::New();
>    <set the grid's points and point data>
>
>    // Create the array to add to the field data.
>    char* charData = new char[16];
>    strcpy(charData, "Hello!");
>    vtkCharArray* pText = vtkCharArray::New();
>    pText->SetArray(charData, strlen(charData) + 1, 0);
>    pText->SetName("Text Test");
>
>    // Add to the field data.
>    pStrGrid->GetFieldData()->AddArray(pText);
>    pText->Delete();
>    pStrGrid->GetFieldData()->CopyAllOn();
>
>    // Pass the data through a filter.
>    vtkContourFilter* pContour = vtkContourFilter::New();
>    pContour->UseScalarTreeOn();
>    pContour->GenerateValues(5, 0.1, 1.0);
>    pContour->SetInput(pStrGrid);
>
>    // Force an update.
>    pContour->GetOutput()->Update();
>
>    // Print info on the original grid.
>    // Its Field Data will contain one array named 'Text Test'.
>    std::cout << "Original Grid:\n";
>    pStrGrid->Print(std::cout);
>
>    // Print info on the contours.
>    // Its Field Data will not contain any arrays.
>    std::cout << "\nContours:\n";
>    pContour->GetOutput()->Print(std::cout);
>
> --
> John Norris
> Research Programmer
> Center for Simulation of Advanced Rockets
> http://www.uiuc.edu/ph/www/jnorris
> _______________________________________________
> This is the private VTK discussion list.
> Please keep messages on-topic. Check the FAQ at: http://www.vtk.org/Wiki/VTK_FAQ
> Follow this link to subscribe/unsubscribe:
> http://www.vtk.org/mailman/listinfo/vtkusers
>