Method WriteLookupTable

IO/Export/vtkJSONSceneExporter.cxx:552–598

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

//------------------------------------------------------------------------------
void vtkJSONSceneExporter::WriteLookupTable(const char* name, vtkScalarsToColors* lookupTable)
{
  if (lookupTable == nullptr)
  {
    return;
  }

  vtkDiscretizableColorTransferFunction* dctfn =
    vtkDiscretizableColorTransferFunction::SafeDownCast(lookupTable);
  if (dctfn != nullptr)
  {
    constexpr const char* INDENT = "    ";
    std::stringstream lutJSON;
    lutJSON << "{\n"
            << INDENT << "  \"clamping\": " << (dctfn->GetClamping() ? "true" : "false") << ",\n"
            << INDENT << "  \"colorSpace\": " << dctfn->GetColorSpace() << ",\n"
            << INDENT << "  \"hSVWrap\": " << (dctfn->GetHSVWrap() ? "true" : "false") << ",\n"
            << INDENT << "  \"alpha\": " << dctfn->GetAlpha() << ",\n"
            << INDENT << "  \"vectorComponent\": " << dctfn->GetVectorComponent() << ",\n"
            << INDENT << "  \"vectorSize\": " << dctfn->GetVectorSize() << ",\n"
            << INDENT << "  \"vectorMode\": " << dctfn->GetVectorMode() << ",\n"
            << INDENT << "  \"indexedLookup\": " << dctfn->GetIndexedLookup() << ",\n"
            << INDENT << "  \"nodes\": [";

    // Fill nodes
    vtkIdType nbNodes = dctfn->GetSize();
    double node[6];
    for (vtkIdType i = 0; i < nbNodes; i++)
    {
      dctfn->GetNodeValue(i, node);
      if (i > 0)
      {
        lutJSON << ",";
      }

      lutJSON << "\n"
              << INDENT << INDENT << "[" << node[0] << ", " << node[1] << ", " << node[2] << ", "
              << node[3] << ", " << node[4] << ", " << node[5] << "]";
    }

    // Close node list
    lutJSON << "\n      ]\n    }";

    // Store in map...
    this->LookupTables[name] = lutJSON.str();
  }
}

//------------------------------------------------------------------------------
void vtkJSONSceneExporter::WritePropCollection(