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// Boost.Geometry (aka GGL, Generic Geometry Library)
// Copyright (c) 2007-2016 Barend Gehrels, Amsterdam, the Netherlands.
// This file was modified by Oracle on 2014-2018.
// Modifications copyright (c) 2014-2018 Oracle and/or its affiliates.
// Contributed and/or modified by Vissarion Fysikopoulos, on behalf of Oracle
// Contributed and/or modified by Adam Wulkiewicz, on behalf of Oracle
// 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_STRATEGIES_GEOGRAPHIC_DISTANCE_HPP
#define BOOST_GEOMETRY_STRATEGIES_GEOGRAPHIC_DISTANCE_HPP
#include <boost/geometry/core/coordinate_type.hpp>
#include <boost/geometry/core/radian_access.hpp>
#include <boost/geometry/core/radius.hpp>
#include <boost/geometry/formulas/andoyer_inverse.hpp>
#include <boost/geometry/formulas/meridian_inverse.hpp>
#include <boost/geometry/formulas/flattening.hpp>
#include <boost/geometry/srs/spheroid.hpp>
#include <boost/geometry/strategies/distance.hpp>
#include <boost/geometry/strategies/geographic/parameters.hpp>
#include <boost/geometry/util/math.hpp>
#include <boost/geometry/util/normalize_spheroidal_coordinates.hpp>
#include <boost/geometry/util/promote_floating_point.hpp>
#include <boost/geometry/util/select_calculation_type.hpp>
#include <boost/geometry/geometries/point_xy.hpp>
namespace boost { namespace geometry
{
namespace strategy { namespace distance
{
/*!
\brief Distance calculation for geographic coordinates on a spheroid
\ingroup strategies
\tparam FormulaPolicy Formula used to calculate azimuths
\tparam Spheroid The spheroid model
\tparam CalculationType \tparam_calculation
\qbk{
[heading See also]
\* [link geometry.reference.algorithms.distance.distance_3_with_strategy distance (with strategy)]
\* [link geometry.reference.srs.srs_spheroid srs::spheroid]
}
*/
template
<
typename FormulaPolicy = strategy::andoyer,
typename Spheroid = srs::spheroid<double>,
typename CalculationType = void
>
class geographic
{
public :
template <typename Point1, typename Point2>
struct calculation_type
: promote_floating_point
<
typename select_calculation_type
<
Point1,
Point2,
CalculationType
>::type
>
{};
typedef Spheroid model_type;
inline geographic()
: m_spheroid()
{}
explicit inline geographic(Spheroid const& spheroid)
: m_spheroid(spheroid)
{}
template <typename CT>
static inline CT apply(CT lon1, CT lat1, CT lon2, CT lat2,
Spheroid const& spheroid)
{
typedef typename formula::meridian_inverse
<
CT, strategy::default_order<FormulaPolicy>::value
> meridian_inverse;
typename meridian_inverse::result res =
meridian_inverse::apply(lon1, lat1, lon2, lat2, spheroid);
if (res.meridian)
{
return res.distance;
}
return FormulaPolicy::template inverse
<
CT, true, false, false, false, false
>::apply(lon1, lat1, lon2, lat2, spheroid).distance;
}
template <typename Point1, typename Point2>
inline typename calculation_type<Point1, Point2>::type
apply(Point1 const& point1, Point2 const& point2) const
{
typedef typename calculation_type<Point1, Point2>::type CT;
CT lon1 = get_as_radian<0>(point1);
CT lat1 = get_as_radian<1>(point1);
CT lon2 = get_as_radian<0>(point2);
CT lat2 = get_as_radian<1>(point2);
return apply(lon1, lat1, lon2, lat2, m_spheroid);
}
inline Spheroid const& model() const
{
return m_spheroid;
}
private :
Spheroid m_spheroid;
};
#ifndef DOXYGEN_NO_STRATEGY_SPECIALIZATIONS
namespace services
{
template
<
typename FormulaPolicy,
typename Spheroid,
typename CalculationType
>
struct tag<geographic<FormulaPolicy, Spheroid, CalculationType> >
{
typedef strategy_tag_distance_point_point type;
};
template
<
typename FormulaPolicy,
typename Spheroid,
typename CalculationType,
typename P1,
typename P2
>
struct return_type<geographic<FormulaPolicy, Spheroid, CalculationType>, P1, P2>
: geographic<FormulaPolicy, Spheroid, CalculationType>::template calculation_type<P1, P2>
{};
template
<
typename FormulaPolicy,
typename Spheroid,
typename CalculationType
>
struct comparable_type<geographic<FormulaPolicy, Spheroid, CalculationType> >
{
typedef geographic<FormulaPolicy, Spheroid, CalculationType> type;
};
template
<
typename FormulaPolicy,
typename Spheroid,
typename CalculationType
>
struct get_comparable<geographic<FormulaPolicy, Spheroid, CalculationType> >
{
static inline geographic<FormulaPolicy, Spheroid, CalculationType>
apply(geographic<FormulaPolicy, Spheroid, CalculationType> const& input)
{
return input;
}
};
template
<
typename FormulaPolicy,
typename Spheroid,
typename CalculationType,
typename P1,
typename P2
>
struct result_from_distance<geographic<FormulaPolicy, Spheroid, CalculationType>, P1, P2>
{
template <typename T>
static inline typename return_type<geographic<FormulaPolicy, Spheroid, CalculationType>, P1, P2>::type
apply(geographic<FormulaPolicy, Spheroid, CalculationType> const& , T const& value)
{
return value;
}
};
template <typename Point1, typename Point2>
struct default_strategy<point_tag, point_tag, Point1, Point2, geographic_tag, geographic_tag>
{
typedef strategy::distance::geographic
<
strategy::andoyer,
srs::spheroid
<
typename select_coordinate_type<Point1, Point2>::type
>
> type;
};
} // namespace services
#endif // DOXYGEN_NO_STRATEGY_SPECIALIZATIONS
}} // namespace strategy::distance
}} // namespace boost::geometry
#endif // BOOST_GEOMETRY_STRATEGIES_GEOGRAPHIC_DISTANCE_HPP
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