[Sandbad]

Dear All,

I have an unstructured mesh and by using ParaView I have applied three
filters in sequence (Python Calculator, Threshold, Extract Surface) on that
mesh . With Python Calculator filter I compute the "area" of the CellData.
I want to write the equivalent C++ code using VTK library. I have read the
data like this:

vtkUnstructuredGridReader * reader = vtkUnstructuredGridReader::New();
reader->SetFileName(filename.c_str());

reader->ReadAllScalarsOn();
reader->ReadAllVectorsOn();
reader->Update();

would you please help me to apply those filters. I would appreciate your help.

Best,
Sandbad