[vtkusers] vtkThreshold by arbitrary array

[John Platt]

Hi All,

 

I would like to threshold an unstructured grid by an arbitrary array
which does not belong to the data set. This is the essence of my code:

 

      // output is the unstructured grid with scalar cell data only.

 

      output->GetCellData()->AddArray(  requiredCells );

      output->GetCellData()->SetActiveScalars( requiredCells ->GetName()
);

      output->GetCellData()->CopyScalarsOff();

 

     // run vtkThreshold on the cell scalars

 

Despite CopyScalarsOff(), "requiredCells" appears in the output from the
vtkThreshold filter whereas I was only expecting the original cell
scalar data. Am I missing anything?

 

Many thanks.

 

John Platt.

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