Method CopyFromDataObject

Remoting/Core/vtkPVDataSetAttributesInformation.cxx:151–251

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void vtkPVDataSetAttributesInformation::CopyFromDataObject(vtkDataObject* dobj)
{
  auto& internals = (*this->Internals);

  // sanity check: this must be called on a clean instance.
  assert(internals.ValuesPopulated == false);

  if (!dobj)
  {
    return;
  }

  // Handle vtkCellGrid cell-data specially.
  auto* cg = vtkCellGrid::SafeDownCast(dobj);
  if (cg)
  {
    if (this->FieldAssociation == vtkDataObject::CELL)
    {
      for (const auto& attId : cg->GetCellAttributeIds())
      {
        auto* cellAtt = cg->GetCellAttributeById(attId);
        if (!cellAtt)
        {
          continue; // TODO: Warn?
        }
        auto ainfo = vtkPVArrayInformation::New();
        ainfo->CopyFromCellAttribute(cg, cellAtt);
        internals.GetOrCreateArrayInformation(cellAtt->GetName().Data()).TakeReference(ainfo);
      }
    }
    internals.ValuesPopulated = true;
    return;
  }

  auto fd = dobj->GetAttributesAsFieldData(this->FieldAssociation);
  if (fd)
  {
    if (dobj->GetNumberOfElements(this->FieldAssociation) == 0)
    {
      return;
    }

    for (int cc = 0, max = fd->GetNumberOfArrays(); cc < max; ++cc)
    {
      auto array = fd->GetAbstractArray(cc);
      if (array && !vtkSkipArray(array->GetName()))
      {
        vtkPVArrayInformation* ainfo = vtkPVArrayInformation::New();
        ainfo->CopyFromArray(fd, cc);
        internals.GetOrCreateArrayInformation(array->GetName()).TakeReference(ainfo);
      }
    }

    if (auto dsa = vtkDataSetAttributes::SafeDownCast(fd))
    {
      for (int cc = 0; cc < vtkDataSetAttributes::NUM_ATTRIBUTES; ++cc)
      {
        auto array = dsa->GetAbstractAttribute(cc);