Method RootExecute

Filters/Parallel/vtkTransmitStructuredDataPiece.cxx:98–156

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//------------------------------------------------------------------------------
void vtkTransmitStructuredDataPiece::RootExecute(
  vtkDataSet* input, vtkDataSet* output, vtkInformation* outInfo)
{
  vtkDataSet* tmp = input->NewInstance();
  int numProcs, i;

  int updatePiece = outInfo->Get(vtkStreamingDemandDrivenPipeline::UPDATE_PIECE_NUMBER());
  int updateNumPieces = outInfo->Get(vtkStreamingDemandDrivenPipeline::UPDATE_NUMBER_OF_PIECES());
  int updatedGhost =
    outInfo->Get(vtkStreamingDemandDrivenPipeline::UPDATE_NUMBER_OF_GHOST_LEVELS());
  if (!this->CreateGhostCells)
  {
    updatedGhost = 0;
  }
  int* wholeExt = input->GetInformation()->Get(vtkDataObject::DATA_EXTENT());

  vtkExtentTranslator* et = vtkExtentTranslator::New();

  int newExt[6];
  et->PieceToExtentThreadSafe(updatePiece, updateNumPieces, updatedGhost, wholeExt, newExt,
    vtkExtentTranslator::BLOCK_MODE, 0);
  output->ShallowCopy(input);
  output->Crop(newExt);

  if (updatedGhost > 0)
  {
    // Create ghost array
    int zeroExt[6];
    et->PieceToExtentThreadSafe(
      updatePiece, updateNumPieces, 0, wholeExt, zeroExt, vtkExtentTranslator::BLOCK_MODE, 0);
    output->GenerateGhostArray(zeroExt);
  }

  numProcs = this->Controller->GetNumberOfProcesses();
  for (i = 1; i < numProcs; ++i)
  {
    int updateInfo[3];
    this->Controller->Receive(updateInfo, 3, i, 22341);
    et->PieceToExtentThreadSafe(updateInfo[0], updateInfo[1], updateInfo[2], wholeExt, newExt,
      vtkExtentTranslator::BLOCK_MODE, 0);
    tmp->ShallowCopy(input);
    tmp->Crop(newExt);

    if (updateInfo[2] > 0)
    {
      // Create ghost array
      int zeroExt[6];
      et->PieceToExtentThreadSafe(
        updateInfo[0], updateInfo[1], 0, wholeExt, zeroExt, vtkExtentTranslator::BLOCK_MODE, 0);
      tmp->GenerateGhostArray(zeroExt);
    }

    this->Controller->Send(tmp, i, 22342);
  }

  // clean up the structures we've used here
  tmp->Delete();
  et->Delete();