text: // Boost.Geometry (aka GGL, Generic Geometry Library)
  
  // Copyright (c) 2021 Barend Gehrels, Amsterdam, the Netherlands.
  
  // Use, modification and distribution is subject to the Boost Software License,
  // Version 1.0. (See accompanying file LICENSE_1_0.txt or copy at
  // http://www.boost.org/LICENSE_1_0.txt)
  
  #ifndef BOOST_GEOMETRY_ALGORITHMS_DETAIL_OVERLAY_APPROXIMATELY_EQUALS_HPP
  #define BOOST_GEOMETRY_ALGORITHMS_DETAIL_OVERLAY_APPROXIMATELY_EQUALS_HPP
  
  #include <boost/geometry/core/access.hpp>
  #include <boost/geometry/util/math.hpp>
  #include <boost/geometry/util/select_coordinate_type.hpp>
  #include <boost/geometry/util/select_most_precise.hpp>
  
  namespace boost { namespace geometry
  {
  
  #ifndef DOXYGEN_NO_DETAIL
  namespace detail { namespace overlay
  {
  
  template <typename Point1, typename Point2, typename E>
  inline bool approximately_equals(Point1 const& a, Point2 const& b,
                                   E const& multiplier)
  {
      using coor_t = typename select_coordinate_type<Point1, Point2>::type;
      using calc_t = typename geometry::select_most_precise<coor_t, E>::type;
  
      calc_t const& a0 = geometry::get<0>(a);
      calc_t const& b0 = geometry::get<0>(b);
      calc_t const& a1 = geometry::get<1>(a);
      calc_t const& b1 = geometry::get<1>(b);
  
      math::detail::equals_factor_policy<calc_t> policy(a0, b0, a1, b1);
      policy.factor *= multiplier;
  
      return math::detail::equals_by_policy(a0, b0, policy)
          && math::detail::equals_by_policy(a1, b1, policy);
  }
  
  }} // namespace detail::overlay
  #endif //DOXYGEN_NO_DETAIL
  
  
  }} // namespace boost::geometry
  
  #endif // BOOST_GEOMETRY_ALGORITHMS_DETAIL_OVERLAY_APPROXIMATELY_EQUALS_HPP
  