[vtkusers] How to really delete cells?

[Corinne Tith]

Thanks for your help. I tried to put your code after
my_polyData->RemoveDeletedCells();
Unfortunately It doesn't work.
I tried to delete lot of cells, they are never really removed.

My VTK version is 5.2, does it matter?


2009/7/28 Dominik Szczerba <dominik at itis.ethz.ch>

> my_polyData->Modified()
>
> Corinne Tith wrote:
>
>> Hi all,
>>
>> I get a polydata volume with a vtkContourFilter and a
>> vtkWindowSincPolyDataFilter.
>> Some cells are not connected to the largest volume. They seem to be 'on'
>> the mesh but have no vertice in common.
>>
>> I tried the filters vtkCleanPolyData and vtkPolyDataConnectivityFilter,
>> but most of my unconnected cells are not removed.
>> Finally, I tried to delete them 'manually', but nothing happens.
>>
>> How can I really remove my unconnected cells?
>>
>> Any help is appreciated, thanks!
>>
>>
>> // generate my volume
>> my_vtkWindowSincPolyDataFilter->SetInputConnection(my_vtkContourFilter->GetOutputPort());
>>
>> // no effect on my cells
>> my_vtkCleanPolyData->SetInputConnection(my_vtkWindowSincPolyDataFilter->GetOutputPort());
>>
>> my_vtkCleanPolyData->PointMergingOn();
>>
>> my_vtkPolyDataConnectivityFilter->SetInputConnection(my_vtkContourFilter->GetOutputPort());
>> my_vtkPolyDataConnectivityFilter->SetExtractionModeToLargestRegion();
>> // manual remove
>> my_vtkPolyDataConnectivityFilter->Update();
>> my_polyData = my_vtkPolyDataConnectivityFilter->GetOutput();
>> for(int i = 0; i < n; i++){
>>       my_polyData->DeleteCell(cellsToRemove[i]);
>> }
>> my_polyData->RemoveDeletedCells();
>>
>>
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