[vtkusers] How to really delete cells?

[Dominik Szczerba]

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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