message: add documentation for PlanView::AddLine
diff: @@ -16,6 +16,15 @@ namespace bark {
  namespace world {
  namespace opendrive {
  +/**
  + * @brief adds a line segment to the plan view. if only two points shall be
  + * generated, set s_inc to length.
  + *
  + * @param start_point starting point
  + * @param heading heading
  + * @param length length of line
  + * @param s_inc increment at which points are sampled
  + */
  bool PlanView::AddLine(Point2d start_point, float heading, float length,
  float s_inc) {
  namespace bg = boost::geometry;
  