Method WriteDataSetAttributes

IO/Export/vtkJSONDataSetWriter.cxx:65–143

//------------------------------------------------------------------------------

std::string vtkJSONDataSetWriter::WriteDataSetAttributes(
  vtkDataSetAttributes* fields, const char* className)
{
  int nbArrayWritten = 0;
  vtkIdType activeTCoords = -1;
  vtkIdType activeScalars = -1;
  vtkIdType activeNormals = -1;
  vtkIdType activeGlobalIds = -1;
  vtkIdType activeTensors = -1;
  vtkIdType activePedigreeIds = -1;
  vtkIdType activeVectors = -1;

  vtkIdType nbFields = fields->GetNumberOfArrays();

  if (nbFields == 0)
  {
    return "";
  }

  std::stringstream jsonSnippet;
  jsonSnippet << "  \"" << className << "\": {"
              << "\n    \"vtkClass\": \"vtkDataSetAttributes\","
              << "\n    \"arrays\": [\n";
  for (vtkIdType idx = 0; idx < nbFields; idx++)
  {
    vtkDataArray* field = fields->GetArray(idx);
    if (field == nullptr)
    {
      continue;
    }

    if (std::string(className) == "pointData")
    {
      if (!this->GetPointArraySelection()->ArrayIsEnabled(field->GetName()))
      {
        vtkDebugMacro("Skipping writing point array " << field->GetName());
        continue;
      }
    }
    else if (std::string(className) == "cellData")
    {
      if (!this->GetCellArraySelection()->ArrayIsEnabled(field->GetName()))
      {
        vtkDebugMacro("Skipping cell array " << field->GetName());
        continue;
      }
    }

    if (nbArrayWritten)
    {
      jsonSnippet << ",\n";
    }

    jsonSnippet << "      { \"data\": " << this->WriteArray(field, "vtkDataArray") << "}";

    // Update active field if any
    activeTCoords = field == fields->GetTCoords() ? nbArrayWritten : activeTCoords;
    activeScalars = field == fields->GetScalars() ? nbArrayWritten : activeScalars;