Method ForceOwnership

Common/DataModel/vtkGraph.cxx:1728–1749

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

//------------------------------------------------------------------------------
void vtkGraph::ForceOwnership()
{
  // If the reference count == 1, we own it and can change it.
  // If the reference count > 1, we must make a copy to avoid
  // changing the structure of other graphs.
  if (this->Internals->GetReferenceCount() > 1)
  {
    vtkGraphInternals* internals = vtkGraphInternals::New();
    internals->Adjacency = this->Internals->Adjacency;
    internals->NumberOfEdges = this->Internals->NumberOfEdges;
    this->SetInternals(internals);
    internals->Delete();
  }
  if (this->EdgePoints && this->EdgePoints->GetReferenceCount() > 1)
  {
    vtkGraphEdgePoints* oldEdgePoints = this->EdgePoints;
    vtkGraphEdgePoints* edgePoints = vtkGraphEdgePoints::New();
    edgePoints->Storage = oldEdgePoints->Storage;
    this->EdgePoints = edgePoints;
    oldEdgePoints->Delete();
  }
}

//------------------------------------------------------------------------------
vtkFieldData* vtkGraph::GetAttributesAsFieldData(int type)