Method RequestData

IO/NetCDF/vtkMPASReader.cxx:1128–1201

//------------------------------------------------------------------------------

int vtkMPASReader::RequestData(vtkInformation* vtkNotUsed(reqInfo),
  vtkInformationVector** vtkNotUsed(inVector), vtkInformationVector* outVector)
{
  vtkDebugMacro(<< "In vtkMPASReader::RequestData" << endl);

  // get the info object
  vtkInformation* outInfo = outVector->GetInformationObject(0);

  // Output will be an ImageData
  vtkUnstructuredGrid* output =
    vtkUnstructuredGrid::SafeDownCast(outInfo->Get(vtkDataObject::DATA_OBJECT()));

  this->DestroyData();
  if (!this->ReadAndOutputGrid())
  {
    this->DestroyData();
    return 0;
  }

  // Collect the time step requested
  this->DTime = 0;
  if (outInfo->Has(vtkStreamingDemandDrivenPipeline::UPDATE_TIME_STEP()))
  {
    this->DTime = outInfo->Get(vtkStreamingDemandDrivenPipeline::UPDATE_TIME_STEP());
  }
  output->GetInformation()->Set(vtkDataObject::DATA_TIME_STEP(), this->DTime);

  // Examine each variable to see if it is selected
  int numPointVars = static_cast<int>(this->Internals->pointVars.size());
  for (int var = 0; var < numPointVars; var++)
  {
    // Is this variable requested
    if (this->PointDataArraySelection->GetArraySetting(var))
    {
      vtkDataArray* array = this->LoadPointVarData(var);
      if (!array)
      {
        char name[NC_MAX_NAME + 1];
        if (!this->Internals->nc_err(
              nc_inq_varname(this->Internals->ncFile, this->Internals->pointVars[var], name)))
        {
          vtkWarningMacro(<< "Error loading point variable '" << name << "'.");
        }
        continue;
      }
      output->GetPointData()->AddArray(array);
    }
  }

  int numCellVars = static_cast<int>(this->Internals->cellVars.size());
  for (int var = 0; var < numCellVars; var++)
  {
    if (this->CellDataArraySelection->GetArraySetting(var))
    {
      vtkDataArray* array = this->LoadCellVarData(var);
      if (!array)
      {
        char name[NC_MAX_NAME + 1];