[Paraview] Resampling data in ParaView

[Jérôme]

Utkarsh,

clear up a doubt for me please: Does it mean that if I want to use
vtkImageConstantPad filter in ParaView, I only have two solutions
that are
1) to write vtkPVImageConstantPad that uses the extent translator
correctly,
2) to submit a patch to the VTK developers that modifies the current
implementation

Thanks again!

Jerome

2010/6/3 Jérôme <jerome.velut at gmail.com>:
> Fine!
> Thanks a lot for your explanations. Then I will work on that.
> Do you mind if I go on this thread for eventual misunderstandings?
>
> Jerome
>
> 2010/6/3 Utkarsh Ayachit <utkarsh.ayachit at kitware.com>:
>> Jerome,
>>
>> The VTK class has the trick to override the extent-translator which is
>> what does-what-it-does in ParaView. ParaView by default overrides the
>> extent translator with vtkPVExtentTranslator which uses the original
>> data exetent information for partitioning and that's what messes such
>> fancy pipelines up. The filer can explicitly override ParaView's
>> behavior. So to answer, no, there's nothing on ParaView side that
>> needs to be added to support changing of extents it is in the
>> pipeline.
>>
>> Utkarsh
>>
>> On Thu, Jun 3, 2010 at 2:24 PM, Jérôme <jerome.velut at gmail.com> wrote:
>>> Hi Utkarsh,
>>>
>>> Thanks for your tips. I will take a look around this class. Though I have
>>> a question: This is a VTK class, and I don't have problem in stand-alone
>>> VTK applications. If I have to change something in VTK classes, it means
>>> that I will have duplicated filters, the native VTK ones and the modified
>>> of mine... Don't you think there something on ParaView-side to do?
>>>
>>> Thanks again and best regards,
>>> Jerome
>>>
>>> 2010/6/3 Utkarsh Ayachit <utkarsh.ayachit at kitware.com>:
>>>> Jerome,
>>>>
>>>> You may want to look at VTK/Hybrid/vtkImageDataLIC2D.cxx to see how it
>>>> plays tricks with the extent-translator to generate images with larger
>>>> extent when magnification > 1.
>>>>
>>>> Utkarsh
>>>>
>>>> On Thu, Jun 3, 2010 at 5:02 AM, Jérôme <jerome.velut at gmail.com> wrote:
>>>>> Finally, I found a bug opened 6 months ago:
>>>>>   http://www.paraview.org/Bug/view.php?id=10125
>>>>> I added a note. I hope that it will interest some PV gurus
>>>>>
>>>>> Jerome
>>>>>
>>>>> 2010/6/2 Jérôme <jerome.velut at gmail.com>:
>>>>>> Dear all,
>>>>>>
>>>>>> I fill very surprised that *nobody* has to resample some data inside
>>>>>> ParaView. Several threads deal with enabling some VTK filters in
>>>>>> ParaView that actually change the extent of the input image (just as
>>>>>> vtkImageResample), but when the output extent is higher that input,
>>>>>> there is a strange behaviour. Sorry for being lazy: the problem was
>>>>>> described in the following threads.
>>>>>>   http://www.paraview.org/pipermail/paraview/2010-May/017309.html
>>>>>>   http://www.paraview.org/pipermail/paraview/2009-October/014306.html
>>>>>>   http://www.paraview.org/pipermail/paraview/2009-April/011945.html
>>>>>>
>>>>>> Please, tell me if I am doing something wrong in the XML, if I am
>>>>>> stupid, if this is a known limitation of ParaView, if I am not sending
>>>>>> to the right mailing list, if [put your own proposition].
>>>>>>
>>>>>> Thanks for all, and best regards.
>>>>>> Jerome
>>>>>>
>>>>>> PS: you can find the incriminated XML files here:
>>>>>> http://github.com/jeromevelut/Peavip . Beware of the Spline Filter,
>>>>>> another pending request has been sent.
>>>>>>
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>>
>