[Paraview] Accessing VTK data from a Paraview plugin

[Miron Sadziak]

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
>>
>>
>