Method RequestData

IO/AMR/vtkAMRBaseParticlesReader.cxx:210–248

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

//------------------------------------------------------------------------------
int vtkAMRBaseParticlesReader::RequestData(vtkInformation* vtkNotUsed(request),
  vtkInformationVector** vtkNotUsed(inputVector), vtkInformationVector* outputVector)
{
  // STEP 0: Get the output object
  vtkInformation* outInf = outputVector->GetInformationObject(0);
  vtkMultiBlockDataSet* mbds =
    vtkMultiBlockDataSet::SafeDownCast(outInf->Get(vtkDataObject::DATA_OBJECT()));
  assert("pre: output multi-block dataset object is nullptr" && (mbds != nullptr));

  // STEP 1: Read Meta-Data
  this->ReadMetaData();

  // STEP 2: Read blocks
  mbds->SetNumberOfBlocks(this->NumberOfBlocks);
  unsigned int blkidx = 0;
  for (; blkidx < static_cast<unsigned int>(this->NumberOfBlocks); ++blkidx)
  {
    if (this->IsBlockMine(blkidx))
    {
      vtkPolyData* particles = this->ReadParticles(blkidx);
      assert("particles dataset should not be nullptr!" && (particles != nullptr));

      mbds->SetBlock(blkidx, particles);
      particles->Delete();
    }
    else
    {
      mbds->SetBlock(blkidx, nullptr);
    }
  } // END for all blocks

  // STEP 3: Synchronize
  if (this->IsParallel())
  {
    this->Controller->Barrier();
  }

  return 1;
}
VTK_ABI_NAMESPACE_END