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Diffstat (limited to 'boost/geometry/core/srs.hpp')
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diff --git a/boost/geometry/core/srs.hpp b/boost/geometry/core/srs.hpp new file mode 100644 index 0000000000..bf1b4e28a5 --- /dev/null +++ b/boost/geometry/core/srs.hpp @@ -0,0 +1,195 @@ +// Boost.Geometry (aka GGL, Generic Geometry Library) + +// Copyright (c) 2007-2012 Barend Gehrels, Amsterdam, the Netherlands. +// Copyright (c) 2008-2012 Bruno Lalande, Paris, France. +// Copyright (c) 2009-2012 Mateusz Loskot, London, UK. + +// This file was modified by Oracle on 2014. +// Modifications copyright (c) 2014 Oracle and/or its affiliates. + +// Contributed and/or modified by Adam Wulkiewicz, on behalf of Oracle + +// Parts of Boost.Geometry are redesigned from Geodan's Geographic Library +// (geolib/GGL), copyright (c) 1995-2010 Geodan, 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_CORE_SRS_HPP +#define BOOST_GEOMETRY_CORE_SRS_HPP + + +#include <cstddef> + +#include <boost/static_assert.hpp> + +#include <boost/geometry/core/radius.hpp> +#include <boost/geometry/core/tag.hpp> +#include <boost/geometry/core/tags.hpp> + + +namespace boost { namespace geometry +{ + +namespace srs +{ + +/*! + \brief Defines spheroid radius values for use in geographical CS calculations + \note See http://en.wikipedia.org/wiki/Figure_of_the_Earth + and http://en.wikipedia.org/wiki/World_Geodetic_System#A_new_World_Geodetic_System:_WGS84 +*/ +template <typename RadiusType> +class spheroid +{ +public: + spheroid(RadiusType const& a, RadiusType const& b) + : m_a(a) + , m_b(b) + {} + + spheroid() + : m_a(RadiusType(6378137.0)) + , m_b(RadiusType(6356752.314245)) + {} + + template <std::size_t I> + RadiusType get_radius() const + { + BOOST_STATIC_ASSERT(I < 3); + + return I < 2 ? m_a : m_b; + } + + template <std::size_t I> + void set_radius(RadiusType const& radius) + { + BOOST_STATIC_ASSERT(I < 3); + + (I < 2 ? m_a : m_b) = radius; + } + +private: + RadiusType m_a, m_b; // equatorial radius, polar radius +}; + +} // namespace srs + +// Traits specializations for spheroid +#ifndef DOXYGEN_NO_TRAITS_SPECIALIZATIONS +namespace traits +{ + +template <typename RadiusType> +struct tag< srs::spheroid<RadiusType> > +{ + typedef srs_spheroid_tag type; +}; + +template <typename RadiusType> +struct radius_type< srs::spheroid<RadiusType> > +{ + typedef RadiusType type; +}; + +template <typename RadiusType, std::size_t Dimension> +struct radius_access<srs::spheroid<RadiusType>, Dimension> +{ + typedef srs::spheroid<RadiusType> spheroid_type; + + static inline RadiusType get(spheroid_type const& s) + { + return s.template get_radius<Dimension>(); + } + + static inline void set(spheroid_type& s, RadiusType const& value) + { + s.template set_radius<Dimension>(value); + } +}; + +} // namespace traits +#endif // DOXYGEN_NO_TRAITS_SPECIALIZATIONS + + +namespace srs +{ + +/*! + \brief Defines sphere radius value for use in spherical CS calculations +*/ +template <typename RadiusType> +class sphere +{ +public: + explicit sphere(RadiusType const& r) + : m_r(r) + {} + sphere() + : m_r(RadiusType((2.0 * 6378137.0 + 6356752.314245) / 3.0)) + {} + + template <std::size_t I> + RadiusType get_radius() const + { + BOOST_STATIC_ASSERT(I < 3); + + return m_r; + } + + template <std::size_t I> + void set_radius(RadiusType const& radius) + { + BOOST_STATIC_ASSERT(I < 3); + + m_r = radius; + } + +private: + RadiusType m_r; // radius +}; + +} // namespace srs + +// Traits specializations for sphere +#ifndef DOXYGEN_NO_TRAITS_SPECIALIZATIONS +namespace traits +{ + +template <typename RadiusType> +struct tag< srs::sphere<RadiusType> > +{ + typedef srs_sphere_tag type; +}; + +template <typename RadiusType> +struct radius_type< srs::sphere<RadiusType> > +{ + typedef RadiusType type; +}; + +template <typename RadiusType, std::size_t Dimension> +struct radius_access<srs::sphere<RadiusType>, Dimension> +{ + typedef srs::sphere<RadiusType> sphere_type; + + static inline RadiusType get(sphere_type const& s) + { + return s.template get_radius<Dimension>(); + } + + static inline void set(sphere_type& s, RadiusType const& value) + { + s.template set_radius<Dimension>(value); + } +}; + +} // namespace traits +#endif // DOXYGEN_NO_TRAITS_SPECIALIZATIONS + + +}} // namespace boost::geometry + + +#endif // BOOST_GEOMETRY_CORE_SRS_HPP |