Method RequestData

IO/Chemistry/vtkVASPAnimationReader.cxx:87–125

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

//------------------------------------------------------------------------------
int vtkVASPAnimationReader::RequestData(
  vtkInformation*, vtkInformationVector**, vtkInformationVector* outInfos)
{
  vtkInformation* outInfo = outInfos->GetInformationObject(0);

  vtkMolecule* output = vtkMolecule::SafeDownCast(outInfo->Get(vtkDataObject::DATA_OBJECT()));
  assert(output);

  vtksys::ifstream in(this->FileName);
  if (!in)
  {
    vtkErrorMacro("Could not open file for reading: " << (this->FileName ? this->FileName : ""));
    return 1;
  }

  // Advance to the selected timestep:
  size_t stepIdx = this->SelectTimeStepIndex(outInfo);
  double time = 0.;
  for (size_t i = 0; i <= stepIdx; ++i) // <= to read the "time=" line
  {
    if (!this->NextTimeStep(in, time))
    {
      vtkErrorMacro("Error -- attempting to read timestep #"
        << (stepIdx + 1) << " but encountered a parsing error at timestep #" << (i + 1) << ".");
      return 1;
    }
  }

  if (this->ReadMolecule(in, output))
  {
    output->GetInformation()->Set(vtkDataObject::DATA_TIME_STEP(), time);
  }
  else
  {
    output->Initialize();
  }

  return 1;
}

//------------------------------------------------------------------------------
int vtkVASPAnimationReader::RequestInformation(