[Paraview] GetPolyData on a BoxWidget

[Laurent Paul]

Hi Utkarsh,

Thanks for your reply!
I'm used to subclass ITK and VTK classes, but I install Paraview using 
the binaries.... not yet from the sources.
If I understand you, this could be very easily done subclassing the 
PVClipDataSet. What about displaying or saving the second output?
How can I get both output ports?
Thanks again,
Laurent.



Le 7/06/2011 14:59, Utkarsh Ayachit a écrit :
> What I'd do is subclass vtkPVClipDataset (the filter paraview uses for
> Clip). Make the subclass a two output-port filter (by calling
> vtkAlgorithm::SetNumberOfOutputPorts(2)) and producing the polydata
> matching the implicit function specified as the clipping function on
> the second output port. Now you can save/visualization both the
> clipped dataset as well as the clipping box. Are you familiar with
> writing vtkAlgorithm subclasses?
>
> Utkarsh
>
> On Tue, Jun 7, 2011 at 8:34 AM, Laurent Paul<l.paul at uclouvain.be>  wrote:
>> Dear Users,
>>
>> I usually clip meshes using the clip filter and a box, or a plane. I would
>> be interested in exporting the clipping box data, not the clippedData, but
>> the box itself. I also would like to get the thickness of the box, eg.
>> distance between two handles.
>> I know that VTK allows to do that (using the method GetPolyData), and that
>> it doesn't work properly (you have to triangulate the data first). There is
>> no option in paraview to retrieve the box.
>>
>> My solution is to create a filter that do the same job as the clipper with
>> the additional ability to export the data and compute the distance. But I'm
>> not sure to be able to handle a widget inside my plugin.
>> Since I've never wrote a plugin for paraview, I prefer ask before!
>>
>> So, is it possible?
>> Is there another (simpler) way around? Add a check box to the "properties"
>> of the clipper to GetPolyData ?
>> Thx,
>> Laurent.
>>
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