Method CopyStructure

Common/DataModel/vtkDataObjectTree.cxx:136–208

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

//------------------------------------------------------------------------------
void vtkDataObjectTree::CopyStructure(vtkCompositeDataSet* compositeSource)
{
  if (!compositeSource)
  {
    return;
  }
  auto dObjTree = vtkDataObjectTree::SafeDownCast(compositeSource);
  if (dObjTree == this)
  {
    return;
  }

  this->Superclass::CopyStructure(compositeSource);
  this->Internals->Children.clear();

  if (dObjTree)
  {
    this->Internals->Children.resize(dObjTree->Internals->Children.size());

    for (auto dObjTreeIter = dObjTree->Internals->Children.begin(),
              thisIter = this->Internals->Children.begin();
         dObjTreeIter != dObjTree->Internals->Children.end(); ++dObjTreeIter, ++thisIter)
    {
      vtkDataObjectTree* subDObjTree = vtkDataObjectTree::SafeDownCast(dObjTreeIter->DataObject);
      if (subDObjTree)
      {
        if (vtkDataObjectTree* copy = this->CreateForCopyStructure(subDObjTree))
        {
          thisIter->DataObject.TakeReference(copy);
          copy->CopyStructure(subDObjTree);
        }
        else
        {
          vtkErrorMacro("CopyStructure has encountered an error and will fail!");
        }
      }

      // shallow copy meta data.
      if (dObjTreeIter->MetaData)
      {
        vtkNew<vtkInformation> info;
        info->Copy(dObjTreeIter->MetaData, /*deep=*/0);
        thisIter->MetaData = info;
      }
    }
  }
  else
  {
    // WARNING:
    // If we copy the structure from a non-tree composite data set
    // we create a special structure of two levels, the first level
    // is just a single partitioned dataSet and the second level are all the data sets.
    // This is likely to change in the future!
    vtkNew<vtkPartitionedDataSet> tempPds;
    auto pds = vtk::TakeSmartPointer(this->CreateForCopyStructure(tempPds));
    this->SetChild(0, pds);

    vtkNew<vtkInformation> info;