[vtkusers] extract subset

[Eric E. Monson]

Hello Ula,

The ParaView "Extract Subset" filter uses the vtkPVExtractVOI class:

http://www.paraview.org/ParaView3/Doc/Nightly/html/classvtkPVExtractVOI.html

I haven't used it, but in the documentation it says, "vtkPVExtractVOI is a wrapper around vtkExtractVOI, vtkExtractGrid and vtkExtractRectilinearGrid. It choose the right filter depending on input and passes the necessary parameters."

So, I think you could use the vtkExtractVOI class from VTK if you're working on vtkImageData:

http://www.vtk.org/doc/nightly/html/classvtkExtractVOI.html

There are a couple examples and tests listed on that page that may help you get started.

-Eric

------------------------------------------------------
Eric E Monson
Duke Visualization Technology Group


On Aug 3, 2010, at 12:57 AM, Ula Popov wrote:

> Hello all,
> 
> I know that there is a filter in paraview "extract subset".
> I need to implement its functionality.
> 
> 	vtkSmartPointer<vtkXMLImageDataReader> reader =
> vtkSmartPointer<vtkXMLImageDataReader>::New();
> 	reader->SetFileName(filename);
> 	reader->Update();
> 	vtkImageData* grid = reader->GetOutput();
> 
> What function should I use? Can I apply it on image data (grid)?
> 
> Thank you,
> Ula
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