Method InsertHandleOnLine

Interaction/Widgets/vtkPolyLineRepresentation.cxx:292–340

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

//------------------------------------------------------------------------------
int vtkPolyLineRepresentation::InsertHandleOnLine(double* pos)
{
  if (this->NumberOfHandles < 2)
  {
    return -1;
  }

  vtkIdType id = this->LinePicker->GetCellId();

  vtkNew<vtkPoints> newpoints;
  newpoints->SetDataType(VTK_DOUBLE);
  newpoints->SetNumberOfPoints(this->NumberOfHandles + 1);

  int insert_index = -1;
  if (id == -1)
  {
    // not on a line, add to the end
    for (int i = 0; i < this->NumberOfHandles; ++i)
    {
      newpoints->SetPoint(i, this->PointHandles[i]->GetPosition());
    }
    newpoints->SetPoint(this->NumberOfHandles, pos);
    insert_index = this->NumberOfHandles;
  }
  else
  {
    vtkIdType subid = this->LinePicker->GetSubId();

    int istart = subid;
    int istop = istart + 1;
    int count = 0;
    for (int i = 0; i <= istart; ++i)
    {
      newpoints->SetPoint(count++, this->PointHandles[i]->GetPosition());
    }

    insert_index = count;
    newpoints->SetPoint(count++, pos);

    for (int i = istop; i < this->NumberOfHandles; ++i)
    {
      newpoints->SetPoint(count++, this->PointHandles[i]->GetPosition());
    }
  }

  this->InitializeHandles(newpoints);

  return insert_index;
}

//------------------------------------------------------------------------------
void vtkPolyLineRepresentation::InitializeHandles(vtkPoints* points)