Method GetEdgePoints

Common/DataModel/vtkGraph.cxx:881–920

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//------------------------------------------------------------------------------
void vtkGraph::GetEdgePoints(vtkIdType e, vtkIdType& npts, double*& pts)
{
  if (vtkDistributedGraphHelper* helper = this->GetDistributedGraphHelper())
  {
    int myRank = this->Information->Get(vtkDataObject::DATA_PIECE_NUMBER());
    if (myRank != helper->GetEdgeOwner(e))
    {
      vtkErrorMacro("vtkGraph cannot retrieve edge points for a non-local vertex");
      return;
    }

    e = helper->GetEdgeIndex(e);
  }

  if (e < 0 || e > this->Internals->NumberOfEdges)
  {
    vtkErrorMacro("Invalid edge id.");
    return;
  }
  if (!this->EdgePoints)
  {
    npts = 0;
    pts = nullptr;
    return;
  }
  std::vector<std::vector<double>>::size_type numEdges = this->Internals->NumberOfEdges;
  if (this->EdgePoints->Storage.size() < numEdges)
  {
    this->EdgePoints->Storage.resize(numEdges);
  }
  npts = static_cast<vtkIdType>(this->EdgePoints->Storage[e].size() / 3);
  if (npts > 0)
  {
    pts = this->EdgePoints->Storage[e].data();
  }
  else
  {
    pts = nullptr;
  }
}

//------------------------------------------------------------------------------
vtkIdType vtkGraph::GetNumberOfEdgePoints(vtkIdType e)