Method RequestData

IO/Geometry/vtkWindBladeReader.cxx:369–409

------------------------------------------------------------------------------ RequestData populates the output object with data for rendering Uses three output ports (field, turbine blades, and ground). Field data is parallel, blade and ground only on processor 0 ------------------------------------------------------------------------------

// Field data is parallel, blade and ground only on processor 0
//------------------------------------------------------------------------------
int vtkWindBladeReader::RequestData(vtkInformation* reqInfo,
  vtkInformationVector** vtkNotUsed(inVector), vtkInformationVector* outVector)
{
  int port = reqInfo->Get(vtkDemandDrivenPipeline::FROM_OUTPUT_PORT());

  // Request data for field port
  if (port == 0)
  {
    std::ostringstream fileName;
    vtkStructuredGrid* field = this->GetFieldOutput();
    this->InitFieldData(outVector, fileName, field);
    this->Internal->FilePtr = vtksys::SystemTools::Fopen(fileName.str(), "rb");
    if (this->Internal->FilePtr == nullptr)
    {
      vtkWarningMacro(<< "Could not open file " << fileName.str());
      return 0;
    }
    this->SetUpFieldVars(field);
    // Close file after all data is read
    fclose(this->Internal->FilePtr);

    return 1;
  }
  // Request data is on blade
  // Even if the blade is turned off, it must update with time along with field
  else if (port == 1)
  {
    if (this->UseTurbineFile == 1)
    {
      this->InitBladeData(outVector);
    }
    return 1;
  }
  // Request data in on ground
  else if (port == 2)
  {
    this->SetUpGroundData(outVector);
  }

  return 1;
}

//------------------------------------------------------------------------------
// Divide data variable by density for display