[Paraview] Accessing VTK data from a Paraview plugin

[David E DeMarle]

You can use a ClientDeliveryRepresentation to copy the data from the
server onto the client. See the Fetch module in paraview's python
wrapped client interface for an example.

On 2/19/08, Miron Sadziak <miron at will.brl.ntt.co.jp> wrote:
> Thank you for your reply. I think I shouldn't have used the word
> "directly". What I want is just 'any' access to the point data of the
> opened object. Even if I had to write both server and client plugin and
> send data by properties calls it would be ok. But by now I cant find any
> way to do it.
>
> Utkarsh Ayachit さんは書きました:
> > As you have discovered, there is no direct access to the actual
> > vtkDataObject on the client side. This is because paraview supports
> > server configurations in which the data processing server may be in
> > another process. In that case one cannot directly access the data on
> > the client side, since the data is never delivered in its entirety to
> > the client.
> >
> > Utkarsh
> >
> > Miron Sadziak wrote:
> >> Thank you for you help. I checked the filter plugin description and
> >> the examples but I think thats not what I want. At least I cant
> >> figure out how I can use it to read the raw data through the client.
> >> The code I posted in the previous mail is already a part of a plugin
> >> which shows a toolbar with buttons in Paraview client. Clicking on a
> >> button should pop up a window with the point coordinates of all
> >> points of the selected source. Thats the aim but now it only shows
> >> the number of points and the vtk class name "vtkImageData". Since
> >> these informations are already on the client there must be a simple
> >> way to get also all the point coordinates/point data of that
> >> vtkImageData class. How to do it ?
> >>
> >>
> >> Mike Jackson さんは書きました:
> >>> You probably want to write a Filter plugin for ParaView. Look on the
> >>> Wiki for more information.
> >>>
> >>> Mike
> >>>
> >>> On Feb 18, 2008, at 8:16 PM, Miron Sadziak wrote:
> >>>
> >>>> Hi
> >>>>
> >>>> I want to write a plugin for Paraview to manipulate the data Paraview
> >>>> has opened.
> >>>> It will be mostly ImageData or PolyData but I would like to understand
> >>>> the general idea how to do it.
> >>>> Im using C++ so the code i have figured out by now looks like that:
> >>>>
> >>>> #Getting the active source
> >>>> pqApplicationCore* core = pqApplicationCore::instance();
> >>>> pqServerManagerSelection sels =
> >>>> *core->getSelectionModel()->selectedItems();
> >>>> pqPipelineSource* source = 0;
> >>>> pqServerManagerModelItem* item = 0;
> >>>> pqServerManagerSelection::ConstIterator iter = sels.begin();
> >>>> item = *iter;
> >>>> source = dynamic_cast<pqPipelineSource*>(item);
> >>>>
> >>>> #Trying to access the data of the source.
> >>>> #Here I can access data information only, not raw-data
> >>>> vtkPVDataInformation*
> >>>> datainfo=source->getOutputPort(0)->getDataInformation(true);
> >>>> cout << "PointsNumber " << datainfo->GetNumberOfPoints() << "\n";
> >>>> cout << "DataClassName " << datainfo->GetDataClassName() << "\n";
> >>>>
> >>>> It all works but its just data information.
> >>>> I would like to access a function like GetData or GetDataArray to be
> >>>> able to read the data contained in the VTK object. To read/write
> >>>> directly from/to the data array. The problem is that I cant find a
> >>>> suitable function in any of the classes like pqPipelineSource,
> >>>> vtkPVDataInformation etc.
> >>>> What should I do ?
> >>>>
> >>>> I would be thankful for any help,
> >>>> Paraview user
> >>>>
> >>>>
> >>>
> >>
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> >>
> >
> >
>
>
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