Method Clear

Rendering/Volume/vtkUnstructuredGridVolumeZSweepMapper.cxx:2078–2101

For each vertex, clear the list of faces incident to it. also set number of cells per vertex to 0.

  // For each vertex, clear the list of faces incident to it.
  // also set number of cells per vertex to 0.
  void Clear()
  {
    vtkIdType i = 0;
    vtkIdType c = static_cast<vtkIdType>(this->Vector.size());
    while (i < c)
    {
      if (this->Vector[i] != nullptr)
      {
        while (!this->Vector[i]->empty())
        {
          (*this->Vector[i]->begin())->Unref();
          this->Vector[i]->pop_front();
        }
        delete this->Vector[i];
        this->Vector[i] = nullptr;
      }
      ++i;
    }
    while (!this->AllFaces.empty())
    {
      (*this->AllFaces.begin())->Unref();
      this->AllFaces.pop_front();
    }
  }

  // Add face to each vertex only if the useset does not have the face yet.
  void AddFace(vtkIdType faceIds[3], vtkDataArray* scalars, vtkIdType cellIdx,