[vtkusers] Delete object from vtkPolyDataConnectivityFilter(C++)

[hao chen]

Hi kenichiro yoshimi,

Very thank you for your method and reply patiently.
I can get the origin CellId now.

This is my part of code:

vtkSmartPointer<vtkDICOMImageReader> DicomImageReader = 
vtkSmartPointer<vtkDICOMImageReader>::New(); 
DicomImageReader->SetDirectoryName("E:\\offline_3Ddata\\2017042402"); 
DicomImageReader->Update(); 

vtkSmartPointer<vtkContourFilter> filter = 
vtkSmartPointer<vtkContourFilter>::New(); 
filter->SetInputConnection(DicomImageReader->GetOutputPort()); 
filter->SetValue(0, 9000);   
filter->Update(); 

vtkSmartPointer<vtkTriangleFilter> triangleFilter = 
vtkSmartPointer<vtkTriangleFilter>::New(); 
triangleFilter->SetInputConnection(filter->GetOutputPort()); 
triangleFilter->Update(); 

*vtkSmartPointer<vtkIdFilter> idFilter =
vtkSmartPointer<vtkIdFilter>::New();
idFilter->SetInputConnection(triangleFilter->GetOutputPort());
idFilter->SetIdsArrayName("ids");
idFilter->Update();*

vtkSmartPointer<vtkPolyDataConnectivityFilter> connectivityFilter = 
vtkSmartPointer<vtkPolyDataConnectivityFilter>::New();   
connectivityFilter->SetInput(*idFilter*->GetOutput());   
connectivityFilter->SetExtractionModeToCellSeededRegions(); 
connectivityFilter->AddSeed(1000); 
connectivityFilter->Update(); 

*vtkSmartPointer<vtkIdTypeArray> cellIdArray =
vtkIdTypeArray::SafeDownCast(connectivityFilter->GetOutput()->GetCellData()->GetArray("ids"));*

*std::vector<double> OriginCellId;
for(int i = 0; i < cellIdArray->GetSize(); i++)
{
	OriginCellId.push_back(cellIdArray->GetTuple1(i));
}*

----------------------------------------------------------------------------------------------------------------------
Use 'cellIdArray->GetTuple1(i)' can get is entire connectivityFilter's
origin cellid in triangleFilter.

In addition, I had a question about vtkIdFilter, did I need to use for sure?
If I don't use, it will error in 'vtkSmartPointer<vtkIdTypeArray>
cellIdArray =
vtkIdTypeArray::SafeDownCast(connectivityFilter->GetOutput()->GetCellData()->GetArray("ids"));'
I think is 'GetArray("ids")' problem.

Sorry my poor english.
Thank you~

Hao



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