Method CopyAttributeArrays

Common/DataModel/vtkCellGridCopyQuery.cxx:166–225

}

void vtkCellGridCopyQuery::CopyAttributeArrays(vtkCellAttribute* srcAtt, vtkStringToken cellType)
{
  if (!this->CopyArrays)
  {
    return;
  }
  if (!srcAtt)
  {
    vtkErrorMacro("Null source attribute.");
    return;
  }
  auto srcCellTypeInfo = srcAtt->GetCellTypeInfo(cellType);
  auto& arraysByRole = srcCellTypeInfo.ArraysByRole;
  for (const auto& roleEntry : arraysByRole)
  {
    auto srcArr = roleEntry.second;
    int arrType = this->Source->GetAttributeTypeForArray(srcArr);
    auto* tgtGroup = this->Target->GetAttributes(arrType);
    if (this->CopyArrayValues && !this->DeepCopyArrays)
    {
      // We should copy by referencing the original array;
      // just add the source array to the destination.
      tgtGroup->AddArray(srcArr);
    }
    else
    {
      // Deep-copy the source array as needed.
      // I. See if we've already copied the array:
      auto mapIt = this->ArrayMap.find(srcArr);
      if (mapIt != this->ArrayMap.end())
      {
        // No need to re-create the array; we've already copied it.
        // Just add it to the array grouping.
        tgtGroup->AddArray(mapIt->second);
        continue;
      }
      // II. We need to create an array.
      auto* tgtArr = vtkAbstractArray::CreateArray(srcArr->GetDataType());
      if (this->CopyArrayValues)
      {
        // Create a deep copy including the values:
        tgtArr->DeepCopy(srcArr);
      }
      else
      {
        // Copy array "metadata" only.
        if (srcArr->HasInformation())
        {
          tgtArr->CopyInformation(srcArr->GetInformation(), /*deep*/ 1);
        }
        tgtArr->SetName(srcArr->GetName());
        tgtArr->SetNumberOfComponents(srcArr->GetNumberOfComponents());
        tgtArr->CopyComponentNames(srcArr);
      }
      tgtGroup->AddArray(tgtArr);
      this->ArrayMap[srcArr] = tgtArr;
      tgtArr->Delete();
    }