Method GetPartInfo

IO/EnSight/core/EnSightDataSet.cxx:1369–1505

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//------------------------------------------------------------------------------
bool EnSightDataSet::GetPartInfo(vtkDataArraySelection* partSelection,
  vtkDataArraySelection* pointArraySelection, vtkDataArraySelection* cellArraySelection,
  vtkDataArraySelection* fieldArraySelection, vtkStringArray* partNames)
{
  // Since we just want to get info on all the parts, we'll just look at the first time step
  if (!this->GeometryFile.SetTimeStepToRead(0.0))
  {
    vtkGenericWarningMacro("couldn't correctly set time step to read. Aborting");
    return false;
  }

  partNames->Initialize();

  // now that geometry file has been opened and file type detected, set format for all variables
  this->SetVariableFileFormat();

  this->GeometryFile.CheckForBeginTimeStepLine();
  this->GeometryFile.SkipNLines(2);

  // read node id, which can be off/given/assign/ignore
  auto result = this->GeometryFile.ReadNextLine();
  std::regex nodeRegEx(R"((?:^|\s)(off|given|assign|ignore)(?=$|\s))");
  std::smatch sm;
  if (result.first && std::regex_search(result.second, sm, nodeRegEx))
  {
    if (sm[1] == "given" || sm[1] == "ignore")
    {
      this->NodeIdsListed = true;
    }
  }

  // similarly for element id
  result = this->GeometryFile.ReadNextLine();
  if (result.first && std::regex_search(result.second, sm, nodeRegEx))
  {
    if (sm[1] == "given" || sm[1] == "ignore")
    {
      this->ElementIdsListed = true;
    }
  }

  result = this->GeometryFile.ReadNextLine();
  if (result.second.find("extents") != std::string::npos)
  {
    if (this->GeometryFile.Format == FileType::ASCII)
    {
      // two values per line in ASCII case
      this->GeometryFile.SkipNLines(3);
    }
    else
    {
      this->GeometryFile.MoveReadPosition(6 * sizeof(float));
    }
    result = this->GeometryFile.ReadNextLine(); // "part"
  }

  while (result.first && result.second.find("part") != std::string::npos)
  {