Method ProcessRequest

Common/ExecutionModel/vtkMultiTimeStepAlgorithm.cxx:45–172

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//------------------------------------------------------------------------------
vtkTypeBool vtkMultiTimeStepAlgorithm::ProcessRequest(
  vtkInformation* request, vtkInformationVector** inputVector, vtkInformationVector* outputVector)
{
  // create the output
  if (request->Has(vtkDemandDrivenPipeline::REQUEST_DATA_OBJECT()))
  {
    return this->RequestDataObject(request, inputVector, outputVector);
  }

  // set update extent
  if (request->Has(vtkCompositeDataPipeline::REQUEST_UPDATE_EXTENT()))
  {
    int retVal(1);
    vtkInformation* inInfo = inputVector[0]->GetInformationObject(0);
    if (this->RequestUpdateIndex == 0)
    {
      retVal = this->RequestUpdateExtent(request, inputVector, outputVector);
    }

    size_t nTimeSteps = this->UpdateTimeSteps.size();
    if (nTimeSteps > 0)
    {
      bool inCache = true;
      for (size_t i = 0; i < nTimeSteps; i++)
      {
        size_t idx;
        if (!this->IsInCache(this->UpdateTimeSteps[i], idx))
        {
          inCache = false;
          break;
        }
      }
      if (!inCache)
      {
        inInfo->Set(vtkStreamingDemandDrivenPipeline::UPDATE_TIME_STEP(),
          this->UpdateTimeSteps[this->RequestUpdateIndex]);
      }
      else
      {
        // Ask for any time step. This should not update unless something else changed.
        inInfo->Remove(vtkStreamingDemandDrivenPipeline::UPDATE_TIME_STEP());
      }
    }
    return retVal;
  }

  // generate the data
  if (request->Has(vtkCompositeDataPipeline::REQUEST_DATA()))
  {
    int retVal = 1;
    vtkInformation* inInfo = inputVector[0]->GetInformationObject(0);
    auto inData = vtk::MakeSmartPointer(inInfo->Get(vtkDataObject::DATA_OBJECT()));

    if (this->UpdateTimeSteps.empty())
    {
      vtkErrorMacro("No temporal data has been requested. ");
      return 0;
    }