Method MakeMetaDataAtTimeStep

IO/Geometry/vtkOpenFOAMReader.cxx:6031–6225

------------------------------------------------------------------------------ Create field data lists and cell/point array selection lists

//------------------------------------------------------------------------------
// Create field data lists and cell/point array selection lists
int vtkOpenFOAMReaderPrivate::MakeMetaDataAtTimeStep(vtkStringArray* cellSelectionNames,
  vtkStringArray* pointSelectionNames, vtkStringArray* lagrangianSelectionNames,
  const bool listNextTimeStep, const bool skipComputingMetaData)
{
  vtkFoamDebug(<< "MakeMetaDataAtTimeStep (" << this->RegionName << "/" << this->ProcessorName
               << ")\n");

  if (!this->HasPolyMesh())
  {
    // Ignore a region without a mesh, but will normally be precluded earlier
    vtkWarningMacro("Called MakeMetaDataAtTimeStep without a mesh.");
    return 1;
  }

  // Track topology change
  const bool topoChanged = (this->TopologyTimeIndex < -1 ||
    (this->TopologyTimeIndex != this->PolyMeshTimeIndexFaces[this->TimeStep]));
  this->TopologyTimeIndex = this->PolyMeshTimeIndexFaces[this->TimeStep];

  // Change in topology or selection, may need to update boundaries
  {
    auto& patches = this->BoundaryDict;

    // User selection changed
    const bool selectChanged = topoChanged ||
      (this->Parent->PatchDataArraySelection->GetMTime() !=
        this->Parent->GetPatchSelectionMTimeOld());

    bool addInternalSelection = false;

    // Read contents of polyMesh/boundary to update patch definitions
    if (topoChanged)
    {
      patches.clearAll();
      const bool isSubRegion = !this->RegionName.empty();
      auto boundaryEntriesPtr(this->GetPolyMeshFile("boundary", isSubRegion));

      if (boundaryEntriesPtr)
      {
        if (!patches.update(*boundaryEntriesPtr))
        {
          vtkErrorMacro(<< patches.error());
          return 0;
        }

        // On topology change, add the internal mesh by default
        addInternalSelection = true;
      }
      else if (isSubRegion)
      {
        // Could be missing polyMesh/boundary for sub-region
        return 0;
      }
    }

    // The internal mesh - set/check status
    if (selectChanged)
    {