Class SquaredDistanceFromSegmentToPoint

libs/geometry/parametrized_segment.hpp:84–98

This functor is here only for backward compatibility. It is not obvious when looking at a call site whether x should be the first or the last parameter to the fuction. For readability, consider creating a parametrized segment and using its methods instead of using this functor.

// For readability, consider creating a parametrized segment and using its methods instead
// of using this functor.
struct SquaredDistanceFromSegmentToPoint
{
  /// @return Squared distance from the segment [a, b] to the point x.
  double operator()(m2::PointD const & a, m2::PointD const & b, m2::PointD const & x) const
  {
    ParametrizedSegment<m2::PointD> segment(a, b);
    return segment.SquaredDistanceToPoint(x);
  }

  template <class PointT>
  double operator()(PointT const & a, PointT const & b, PointT const & x) const
  {
    return this->operator()(m2::PointD(a), m2::PointD(b), m2::PointD(x));
  }
};
}  // namespace m2