[Paraview] GetPolyData on a BoxWidget

[Utkarsh Ayachit]

Once you make the VTK filter have two output ports, paraview will
automatically detect it and you will be able to see both output ports
in the pipeline browser.

On Tue, Jun 7, 2011 at 9:03 AM, Laurent Paul <l.paul at uclouvain.be> wrote:
> 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.
>>>
>>> --
>>> Please consider environmental impact before printing documents
>>> _______________________________________________
>>> Powered by www.kitware.com
>>>
>>> Visit other Kitware open-source projects at
>>> http://www.kitware.com/opensource/opensource.html
>>>
>>> Please keep messages on-topic and check the ParaView Wiki at:
>>> http://paraview.org/Wiki/ParaView
>>>
>>> Follow this link to subscribe/unsubscribe:
>>> http://www.paraview.org/mailman/listinfo/paraview
>>>
>>>
>