Method SetNodeValue

Common/DataModel/vtkPiecewiseFunction.cxx:341–371

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//------------------------------------------------------------------------------
int vtkPiecewiseFunction::SetNodeValue(int index, double val[4])
{
  int size = static_cast<int>(this->Internal->Nodes.size());

  if (index < 0 || index >= size)
  {
    vtkErrorMacro("Index out of range!");
    return -1;
  }

  double oldX = this->Internal->Nodes[index]->X;
  this->Internal->Nodes[index]->X = val[0];
  this->Internal->Nodes[index]->Y = val[1];
  this->Internal->Nodes[index]->Midpoint = val[2];
  this->Internal->Nodes[index]->Sharpness = val[3];

  if (oldX != val[0])
  {
    // The point has been moved, the order of points or the range might have
    // been modified.
    this->SortAndUpdateRange();
    // No need to call Modified() here because SortAndUpdateRange() has done it
    // already.
  }
  else
  {
    this->Modified();
  }

  return 1;
}

//------------------------------------------------------------------------------
int vtkPiecewiseFunction::AddPoint(double x, double y)