Method RequestData

Filters/Sources/vtkHyperTreeGridSource.cxx:350–596

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

//------------------------------------------------------------------------------
int vtkHyperTreeGridSource::RequestData(
  vtkInformation*, vtkInformationVector**, vtkInformationVector* outputVector)
{
  // Retrieve the output
  vtkDataObject* outputDO = vtkDataObject::GetData(outputVector, 0);
  vtkHyperTreeGrid* output = vtkHyperTreeGrid::SafeDownCast(outputDO);
  if (!output)
  {
    vtkErrorMacro("pre: output_not_HyperTreeGrid: " << outputDO->GetClassName());
    return 0;
  }

  vtkInformation* outInfo = outputVector->GetInformationObject(0);
  this->Piece = outInfo->Get(vtkStreamingDemandDrivenPipeline::UPDATE_PIECE_NUMBER());
  this->NumPieces = outInfo->Get(vtkStreamingDemandDrivenPipeline::UPDATE_NUMBER_OF_PIECES());

  output->Initialize();

  // A mask is required when using UseMask or when assigning trees to pieces,
  // so we create it every time.
  vtkNew<vtkBitArray> mask;
  output->SetMask(mask);

  vtkCellData* outData = output->GetCellData();

  this->LevelBitsIndexCnt.clear();
  this->LevelBitsIndexCnt.push_back(0);

  // When using descriptor-based definition, initialize descriptor parsing
  if (this->UseDescriptor)
  {
    // Calculate refined block size
    this->BlockSize = this->BranchFactor;
    for (unsigned int i = 1; i < this->Dimension; ++i)
    {
      this->BlockSize *= this->BranchFactor;
    }

    if (!this->DescriptorBits && !this->InitializeFromStringDescriptor())
    {
      vtkErrorMacro(<< "Could not initialize string descriptor.");
      return 0;
    }
    else if (this->DescriptorBits && !this->InitializeFromBitsDescriptor())
    {
      vtkErrorMacro(<< "Could not initialize bits descriptor.");
      return 0;
    }
  } // if this->UseDescriptor

  // Set straightforward grid parameters
  output->SetTransposedRootIndexing(this->TransposedRootIndexing);
  output->SetBranchFactor(this->BranchFactor);

  //  Set parameters that depend on dimension
  switch (this->Dimension)
  {
    case 1: