Method RequestData

Filters/Reduction/vtkToImplicitArrayFilter.cxx:166–251

-------------------------------------------------------------------------

//-------------------------------------------------------------------------
int vtkToImplicitArrayFilter::RequestData(vtkInformation* vtkNotUsed(info),
  vtkInformationVector** inputInfo, vtkInformationVector* outputInfo)
{
  auto input = vtkDataObject::GetData(inputInfo[0], 0);
  auto output = vtkDataObject::GetData(outputInfo, 0);
  output->ShallowCopy(input);

  if (!this->Internals->Strategy)
  {
    vtkWarningMacro("No strategy set in vtkToImplicitArrayFilter");
    return 1;
  }

  for (int association = 0; association < vtkDataObject::NUMBER_OF_ASSOCIATIONS; ++association)
  {
    this->UpdateProgress(association / vtkDataObject::NUMBER_OF_ASSOCIATIONS);

    if (this->CheckAbort())
    {
      break;
    }

    auto outFD = output->GetAttributesAsFieldData(association);
    auto outAttr = vtkDataSetAttributes::SafeDownCast(outFD);

    if (!outAttr)
    {
      continue;
    }

    auto select = this->GetArraySelection(association);
    if (!select)
    {
      vtkWarningMacro(
        "Selection is nullptr for an attribute type when it should not be for any association.");
      continue;
    }

    const int nArrays = outAttr->GetNumberOfArrays();
    double progress = association / vtkDataObject::NUMBER_OF_ASSOCIATIONS;
    double progressIncr = 1 / (vtkDataObject::NUMBER_OF_ASSOCIATIONS * (nArrays ? nArrays : 1));
    std::vector<int> arraysToRemove;
    std::vector<vtkSmartPointer<vtkDataArray>> arraysToAdd;
    for (int iArr = 0; iArr < nArrays; ++iArr)
    {
      vtkDataArray* arr = outAttr->GetArray(iArr);
      if (!arr)
      {
        continue;
      }
      if (!select->ArrayIsEnabled(arr->GetName()))
      {
        continue;
      }

      vtkToImplicitStrategy::Optional estimatedReduction =
        this->Internals->Strategy->EstimateReduction(arr);