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

[kenichiro yoshimi]

Hi Hao,

Beforehand you can make a numbering of cell ids using vtkIdFilter
before applying connectivityFilter.
See: https://lorensen.github.io/VTKExamples/site/Cxx/PolyData/PointCellIds/

Regards
2018年7月12日(木) 22:26 hao chen <harry1994128 at gmail.com>:
>
> Hello, I want to delete one object in vtkTriangleFilter, have some question
> about origin CellId after I do vtkPolyDataConnectivityFilter.
>
> Part of my code:
>
> vtkSmartPointer<vtkDICOMImageReader> DicomImageReader =
> vtkSmartPointer<vtkDICOMImageReader>::New();
> DicomImageReader->SetDirectoryName("E:\\offline_3Ddata\\2017042402");
> DicomImageReader->Update();
> In my part of code:
> 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<vtkPolyDataConnectivityFilter> connectivityFilter =
> vtkSmartPointer<vtkPolyDataConnectivityFilter>::New();
> connectivityFilter->SetInput(triangleFilter->GetOutput());
> connectivityFilter->SetExtractionModeToCellSeededRegions();
> connectivityFilter->AddSeed(1000);
> connectivityFilter->Update();
>
> ----------------------------------------------------------------------------------------------------------------------
> This case in triangleFilter have many objects and use connectivityFilter it
> will find CellId = 1000 in triangleFilter others cell connected with CellId
> = 1000.
>
> After that connectivityFilter will have one object, and the
> connectivityFilter's CellId will start with zero, but I want the original
> CellId.
>
> How can I get the original CellId in connectivityFilter? I want to delete
> object in the triangleFilter.
> Or have any other solution.
>
> Sorry my poor english. Thx~
>
> Hao
>
>
>
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