[Paraview] GetPolyData on a BoxWidget

[Utkarsh Ayachit]

You are using 64-bit Qt while building a 32-bit binary. Make sure you
re-configure ParaView (using cmake) and pick 64bit compiler.

When clipping with box, you'd get a  vtkPVBox as the implicit
function. You can get the box dimensions from it and the construct
your own polydata or use vtkCubeSource in combination with
vtkTransformFilter to get the oriented bounding box. You cannot get
access to the vtkBoxWidget in a filter.

Utkarsh

On Tue, Jun 7, 2011 at 11:17 AM, Laurent Paul <l.paul at uclouvain.be> wrote:
> I'm currently building paraview from sources...
> I had errors caused by Qt.
> "fatal error LNK1112: module machine type 'X86' conflicts with target
> machine type 'x64'" in QtGUI4.dll and in QtCore4.dll
> My computer runs Windows 7 64 bits. I have downloaded and installed (not
> built) Qt4.7.3 Vs2008.
> My compiler is VS2010 64 bits edition.
> Do you think it is a building error from Qt or from the compiler version?
>
> I have created a subclass of vtkPVClipDataSet as you adviced me.
> If I am right, Data clipping using a box is performed by moving a BoxWidget,
> getting the vtkPlanes and providing them to vtkPVClipDataSet as
> implicitFunction. Can you confirm me?
> If yes, it is not exactly what I was looking for since I need to access to
> the box widget to retrieve the polydata. In vtkPVClipDataSet i on ly have
> acces to the implicit function, thus the vtkPlanes.
> I guess that I need to access to the point in the code where we get the
> BoxWidget just before passing the vtkPlanes to the clipper.
> Can you show me where it is (sorry, it is the first time i open the paraview
> source code, I need help!) ?
>
> Laurent.
>
>
>
> Le 7/06/2011 15:05, Utkarsh Ayachit a écrit :
>>
>> 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
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>