Function MatchArrayTypes

IO/XML/vtkXMLUnstructuredDataReader.cxx:36–56

Ensures that array1 and array2 are of the same type. Returns a pair with array type selected as follows: if both arrays have different element bytesize, the one with the larger size is chosen if both arrays have different element types, then the type for the second argument is chosen

// * if both arrays have different element types, then the type for the second
//   argument is chosen
std::pair<vtkSmartPointer<vtkDataArray>, vtkSmartPointer<vtkDataArray>> MatchArrayTypes(
  vtkSmartPointer<vtkDataArray> array1, vtkSmartPointer<vtkDataArray> array2)
{
  if (array1->GetElementComponentSize() > array2->GetElementComponentSize())
  {
    auto new2 = vtk::TakeSmartPointer(array1->NewInstance());
    new2->DeepCopy(array2);
    return std::make_pair(array1, new2);
  }
  else if (array2->GetElementComponentSize() > array1->GetElementComponentSize() ||
    array1->GetDataType() != array2->GetDataType())
  {
    auto new1 = vtk::TakeSmartPointer(array2->NewInstance());
    new1->DeepCopy(array1);
    return std::make_pair(new1, array2);
  }
  else
  {
    return std::make_pair(array1, array2);
  }
}

}