Method RequestDataObject

Filters/Geometry/vtkImageDataToUniformGrid.cxx:38–76

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

//------------------------------------------------------------------------------
int vtkImageDataToUniformGrid::RequestDataObject(
  vtkInformation*, vtkInformationVector** inV, vtkInformationVector* outV)
{
  vtkInformation* inInfo = inV[0]->GetInformationObject(0);
  if (!inInfo)
  {
    return VTK_ERROR;
  }

  vtkInformation* outInfo = outV->GetInformationObject(0);

  if (vtkDataObjectTree* input = vtkDataObjectTree::GetData(inInfo))
  { // multiblock data sets
    vtkDataObjectTree* output = vtkDataObjectTree::GetData(outInfo);
    if (!output)
    {
      output = input->NewInstance();
      outInfo->Set(vtkDataObject::DATA_OBJECT(), output);
      this->GetOutputPortInformation(0)->Set(
        vtkDataObject::DATA_EXTENT_TYPE(), output->GetExtentType());
      output->Delete();
    }
    return VTK_OK;
  }
  if (vtkImageData::GetData(inInfo) != nullptr)
  {
    vtkUniformGrid* output = vtkUniformGrid::New();
    outInfo->Set(vtkDataObject::DATA_OBJECT(), output);
    this->GetOutputPortInformation(0)->Set(
      vtkDataObject::DATA_EXTENT_TYPE(), output->GetExtentType());
    output->Delete();

    return VTK_OK;
  }

  vtkErrorMacro(
    "Don't know how to handle input of type " << vtkDataObject::GetData(inInfo)->GetClassName());
  return VTK_ERROR;
}

//------------------------------------------------------------------------------
int vtkImageDataToUniformGrid::RequestData(