Function UpdateLookup

Common/Core/vtkGenericDataArrayLookupHelper.h:109–128

  void operator=(const vtkGenericDataArrayLookupHelper&) = delete;

  void UpdateLookup()
  {
    if (!this->AssociatedArray || (this->AssociatedArray->GetNumberOfTuples() < 1) ||
      (!this->ValueMap.empty() || !this->NanIndices.empty()))
    {
      return;
    }

    vtkIdType num = this->AssociatedArray->GetNumberOfValues();
    this->ValueMap.reserve(num);
    for (vtkIdType i = 0; i < num; ++i)
    {
      auto value = this->AssociatedArray->GetValue(i);
      if (vtkGenericDataArrayLookupHelper_detail::isnan(value))
      {
        NanIndices.push_back(i);
      }
      this->ValueMap[value].push_back(i);
    }
  }

  // Return a pointer to the relevant vector of indices if specified value was
  // found in the array.