Method Contour

Common/DataModel/vtkPolyLine.cxx:374–401

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//------------------------------------------------------------------------------
void vtkPolyLine::Contour(double value, vtkDataArray* cellScalars,
  vtkIncrementalPointLocator* locator, vtkCellArray* verts, vtkCellArray* lines,
  vtkCellArray* polys, vtkPointData* inPd, vtkPointData* outPd, vtkCellData* inCd, vtkIdType cellId,
  vtkCellData* outCd)
{
  const vtkIdType numLines = this->Points->GetNumberOfPoints() - 1;
  vtkNew<vtkDoubleArray> lineScalars;
  lineScalars->SetNumberOfComponents(cellScalars->GetNumberOfComponents());
  lineScalars->SetNumberOfTuples(2);

  for (vtkIdType i = 0; i < numLines; i++)
  {
    this->Line->Points->SetPoint(0, this->Points->GetPoint(i));
    this->Line->Points->SetPoint(1, this->Points->GetPoint(i + 1));

    if (outPd)
    {
      this->Line->PointIds->SetId(0, this->PointIds->GetId(i));
      this->Line->PointIds->SetId(1, this->PointIds->GetId(i + 1));
    }

    lineScalars->SetTuple(0, cellScalars->GetTuple(i));
    lineScalars->SetTuple(1, cellScalars->GetTuple(i + 1));

    this->Line->Contour(
      value, lineScalars, locator, verts, lines, polys, inPd, outPd, inCd, cellId, outCd);
  }
}

//------------------------------------------------------------------------------
// Intersect with sub-lines