// Boost.Geometry (aka GGL, Generic Geometry Library)
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// Copyright (c) 2007-2012 Barend Gehrels, Amsterdam, the Netherlands.
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// Copyright (c) 2008-2012 Bruno Lalande, Paris, France.
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// Copyright (c) 2009-2012 Mateusz Loskot, London, UK.
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// This file was modified by Oracle on 2014, 2016, 2017, 2018, 2020.
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// Modifications copyright (c) 2014-2020 Oracle and/or its affiliates.
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// Contributed and/or modified by Adam Wulkiewicz, on behalf of Oracle
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// Parts of Boost.Geometry are redesigned from Geodan's Geographic Library
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// (geolib/GGL), copyright (c) 1995-2010 Geodan, Amsterdam, the Netherlands.
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// Use, modification and distribution is subject to the Boost Software License,
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// Version 1.0. (See accompanying file LICENSE_1_0.txt or copy at
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// http://www.boost.org/LICENSE_1_0.txt)
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#ifndef BOOST_GEOMETRY_SRS_SPHEROID_HPP
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#define BOOST_GEOMETRY_SRS_SPHEROID_HPP
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#include <cstddef>
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#include <boost/static_assert.hpp>
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#include <boost/geometry/core/radius.hpp>
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#include <boost/geometry/core/tag.hpp>
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#include <boost/geometry/core/tags.hpp>
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#if defined(BOOST_GEOMETRY_ENABLE_ACCESS_DEBUGGING)
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#include <boost/geometry/core/assert.hpp>
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#endif
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namespace boost { namespace geometry
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{
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namespace srs
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{
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/*!
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\brief Defines spheroid radius values for use in geographical CS calculations
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\ingroup srs
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\note See http://en.wikipedia.org/wiki/Figure_of_the_Earth
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and http://en.wikipedia.org/wiki/World_Geodetic_System#A_new_World_Geodetic_System:_WGS84
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\tparam RadiusType tparam_radius
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*/
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template <typename RadiusType>
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class spheroid
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{
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public:
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spheroid(RadiusType const& a, RadiusType const& b)
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: m_a(a)
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, m_b(b)
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{
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#if defined(BOOST_GEOMETRY_ENABLE_ACCESS_DEBUGGING)
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m_created = 1;
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#endif
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}
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spheroid()
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: m_a(RadiusType(6378137.0))
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, m_b(RadiusType(6356752.3142451793))
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{
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#if defined(BOOST_GEOMETRY_ENABLE_ACCESS_DEBUGGING)
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m_created = 1;
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#endif
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}
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#if defined(BOOST_GEOMETRY_ENABLE_ACCESS_DEBUGGING)
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~spheroid()
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{
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m_created = 0;
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}
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#endif
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template <std::size_t I>
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RadiusType get_radius() const
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{
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#if defined(BOOST_GEOMETRY_ENABLE_ACCESS_DEBUGGING)
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if (m_created != 1)
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{
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int a = 10;
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}
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BOOST_GEOMETRY_ASSERT(m_created == 1);
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#endif
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BOOST_STATIC_ASSERT(I < 3);
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return I < 2 ? m_a : m_b;
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}
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template <std::size_t I>
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void set_radius(RadiusType const& radius)
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{
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#if defined(BOOST_GEOMETRY_ENABLE_ACCESS_DEBUGGING)
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BOOST_GEOMETRY_ASSERT(m_created == 1);
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#endif
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BOOST_STATIC_ASSERT(I < 3);
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(I < 2 ? m_a : m_b) = radius;
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}
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private:
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RadiusType m_a, m_b; // equatorial radius, polar radius
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#if defined(BOOST_GEOMETRY_ENABLE_ACCESS_DEBUGGING)
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int m_created;
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#endif
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};
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} // namespace srs
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// Traits specializations for spheroid
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#ifndef DOXYGEN_NO_TRAITS_SPECIALIZATIONS
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namespace traits
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{
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template <typename RadiusType>
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struct tag< srs::spheroid<RadiusType> >
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{
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typedef srs_spheroid_tag type;
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};
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template <typename RadiusType>
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struct radius_type< srs::spheroid<RadiusType> >
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{
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typedef RadiusType type;
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};
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template <typename RadiusType, std::size_t Dimension>
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struct radius_access<srs::spheroid<RadiusType>, Dimension>
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{
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typedef srs::spheroid<RadiusType> spheroid_type;
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static inline RadiusType get(spheroid_type const& s)
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{
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return s.template get_radius<Dimension>();
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}
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static inline void set(spheroid_type& s, RadiusType const& value)
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{
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s.template set_radius<Dimension>(value);
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}
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};
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} // namespace traits
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#endif // DOXYGEN_NO_TRAITS_SPECIALIZATIONS
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}} // namespace boost::geometry
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#endif // BOOST_GEOMETRY_SRS_SPHEROID_HPP
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