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// Boost.Geometry
// Copyright (c) 2007-2012 Barend Gehrels, Amsterdam, the Netherlands.
// This file was modified by Oracle on 2015.
// Modifications copyright (c) 2015 Oracle and/or its affiliates.
// 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_THOMAS_HPP
#define BOOST_GEOMETRY_STRATEGIES_GEOGRAPHIC_THOMAS_HPP
#include <boost/geometry/core/coordinate_type.hpp>
#include <boost/geometry/core/radian_access.hpp>
#include <boost/geometry/strategies/distance.hpp>
#include <boost/geometry/util/promote_floating_point.hpp>
#include <boost/geometry/util/select_calculation_type.hpp>
#include <boost/geometry/algorithms/detail/thomas_inverse.hpp>
namespace boost { namespace geometry
{
namespace strategy { namespace distance
{
/*!
\brief The solution of the inverse problem of geodesics on latlong coordinates,
Forsyth-Andoyer-Lambert type approximation with second order terms.
\ingroup distance
\tparam Spheroid The reference spheroid model
\tparam CalculationType \tparam_calculation
\author See
- Technical Report: PAUL D. THOMAS, MATHEMATICAL MODELS FOR NAVIGATION SYSTEMS, 1965
http://www.dtic.mil/docs/citations/AD0627893
- Technical Report: PAUL D. THOMAS, SPHEROIDAL GEODESICS, REFERENCE SYSTEMS, AND LOCAL GEOMETRY, 1970
http://www.dtic.mil/docs/citations/AD703541
*/
template
<
typename Spheroid,
typename CalculationType = void
>
class thomas
{
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 thomas()
: m_spheroid()
{}
explicit inline thomas(Spheroid const& spheroid)
: m_spheroid(spheroid)
{}
template <typename Point1, typename Point2>
inline typename calculation_type<Point1, Point2>::type
apply(Point1 const& point1, Point2 const& point2) const
{
return geometry::detail::thomas_inverse
<
typename calculation_type<Point1, Point2>::type,
true, false
>::apply(get_as_radian<0>(point1),
get_as_radian<1>(point1),
get_as_radian<0>(point2),
get_as_radian<1>(point2),
m_spheroid).distance;
}
inline Spheroid const& model() const
{
return m_spheroid;
}
private :
Spheroid m_spheroid;
};
#ifndef DOXYGEN_NO_STRATEGY_SPECIALIZATIONS
namespace services
{
template <typename Spheroid, typename CalculationType>
struct tag<thomas<Spheroid, CalculationType> >
{
typedef strategy_tag_distance_point_point type;
};
template <typename Spheroid, typename CalculationType, typename P1, typename P2>
struct return_type<thomas<Spheroid, CalculationType>, P1, P2>
: thomas<Spheroid, CalculationType>::template calculation_type<P1, P2>
{};
template <typename Spheroid, typename CalculationType>
struct comparable_type<thomas<Spheroid, CalculationType> >
{
typedef thomas<Spheroid, CalculationType> type;
};
template <typename Spheroid, typename CalculationType>
struct get_comparable<thomas<Spheroid, CalculationType> >
{
static inline thomas<Spheroid, CalculationType> apply(thomas<Spheroid, CalculationType> const& input)
{
return input;
}
};
template <typename Spheroid, typename CalculationType, typename P1, typename P2>
struct result_from_distance<thomas<Spheroid, CalculationType>, P1, P2 >
{
template <typename T>
static inline typename return_type<thomas<Spheroid, CalculationType>, P1, P2>::type
apply(thomas<Spheroid, CalculationType> const& , T const& value)
{
return value;
}
};
} // namespace services
#endif // DOXYGEN_NO_STRATEGY_SPECIALIZATIONS
}} // namespace strategy::distance
}} // namespace boost::geometry
#endif // BOOST_GEOMETRY_STRATEGIES_GEOGRAPHIC_THOMAS_HPP
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