// Boost.Geometry (aka GGL, Generic Geometry Library)
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// Copyright (c) 2007-2015 Barend Gehrels, Amsterdam, the Netherlands.
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// Copyright (c) 2008-2015 Bruno Lalande, Paris, France.
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// Copyright (c) 2009-2015 Mateusz Loskot, London, UK.
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// Copyright (c) 2013-2015 Adam Wulkiewicz, Lodz, Poland.
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// This file was modified by Oracle on 2013-2018.
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// Modifications copyright (c) 2013-2018, Oracle and/or its affiliates.
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// Contributed and/or modified by Adam Wulkiewicz, on behalf of Oracle
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// Contributed and/or modified by Menelaos Karavelas, 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_STRATEGIES_SPHERICAL_DISJOINT_BOX_BOX_HPP
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#define BOOST_GEOMETRY_STRATEGIES_SPHERICAL_DISJOINT_BOX_BOX_HPP
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#include <cstddef>
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#include <boost/geometry/core/cs.hpp>
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#include <boost/geometry/strategies/cartesian/disjoint_box_box.hpp>
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#include <boost/geometry/strategies/disjoint.hpp>
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#include <boost/geometry/util/normalize_spheroidal_coordinates.hpp>
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#include <boost/geometry/util/select_most_precise.hpp>
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namespace boost { namespace geometry { namespace strategy { namespace disjoint
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{
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#ifndef DOXYGEN_NO_DETAIL
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namespace detail
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{
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struct box_box_on_spheroid
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{
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template <typename Box1, typename Box2>
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static inline bool apply(Box1 const& box1, Box2 const& box2)
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{
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typedef typename geometry::select_most_precise
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<
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typename coordinate_type<Box1>::type,
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typename coordinate_type<Box2>::type
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>::type calc_t;
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typedef typename geometry::detail::cs_angular_units<Box1>::type units_t;
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typedef math::detail::constants_on_spheroid<calc_t, units_t> constants;
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calc_t const b1_min = get<min_corner, 0>(box1);
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calc_t const b1_max = get<max_corner, 0>(box1);
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calc_t const b2_min = get<min_corner, 0>(box2);
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calc_t const b2_max = get<max_corner, 0>(box2);
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// min <= max <=> diff >= 0
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calc_t const diff1 = b1_max - b1_min;
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calc_t const diff2 = b2_max - b2_min;
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// check the intersection if neither box cover the whole globe
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if (diff1 < constants::period() && diff2 < constants::period())
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{
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// calculate positive longitude translation with b1_min as origin
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calc_t const diff_min = math::longitude_distance_unsigned<units_t>(b1_min, b2_min);
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calc_t const b2_min_transl = b1_min + diff_min; // always right of b1_min
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calc_t b2_max_transl = b2_min_transl - constants::period() + diff2;
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// if the translation is too close then use the original point
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// note that math::abs(b2_max_transl - b2_max) takes values very
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// close to k*2*constants::period() for k=0,1,2,...
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if (math::abs(b2_max_transl - b2_max) < constants::period() / 2)
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{
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b2_max_transl = b2_max;
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}
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if (b2_min_transl > b1_max // b2_min right of b1_max
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&& b2_max_transl < b1_min) // b2_max left of b1_min
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{
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return true;
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}
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}
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return box_box
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<
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Box1, Box2, 1
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>::apply(box1, box2);
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}
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};
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} // namespace detail
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#endif // DOXYGEN_NO_DETAIL
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struct spherical_box_box
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{
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template <typename Box1, typename Box2>
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static inline bool apply(Box1 const& box1, Box2 const& box2)
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{
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return detail::box_box_on_spheroid::apply(box1, box2);
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}
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};
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namespace services
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{
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template <typename Box1, typename Box2, int TopDim1, int TopDim2>
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struct default_strategy<Box1, Box2, box_tag, box_tag, TopDim1, TopDim2, spherical_equatorial_tag, spherical_equatorial_tag>
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{
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typedef disjoint::spherical_box_box type;
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};
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template <typename Box1, typename Box2, int TopDim1, int TopDim2>
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struct default_strategy<Box1, Box2, box_tag, box_tag, TopDim1, TopDim2, spherical_polar_tag, spherical_polar_tag>
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{
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typedef disjoint::spherical_box_box type;
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};
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template <typename Box1, typename Box2, int TopDim1, int TopDim2>
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struct default_strategy<Box1, Box2, box_tag, box_tag, TopDim1, TopDim2, geographic_tag, geographic_tag>
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{
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typedef disjoint::spherical_box_box type;
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};
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} // namespace services
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}}}} // namespace boost::geometry::strategy::disjoint
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#endif // BOOST_GEOMETRY_STRATEGIES_SPHERICAL_DISJOINT_BOX_BOX_HPP
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