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50 lines
1.6 KiB
C++
50 lines
1.6 KiB
C++
// Boost.Geometry (aka GGL, Generic Geometry Library)
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// Copyright (c) 2021 Barend Gehrels, 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_ALGORITHMS_DETAIL_OVERLAY_APPROXIMATELY_EQUALS_HPP
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#define BOOST_GEOMETRY_ALGORITHMS_DETAIL_OVERLAY_APPROXIMATELY_EQUALS_HPP
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#include <boost/geometry/core/access.hpp>
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#include <boost/geometry/util/math.hpp>
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#include <boost/geometry/util/select_coordinate_type.hpp>
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#include <boost/geometry/util/select_most_precise.hpp>
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namespace boost { namespace geometry
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{
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#ifndef DOXYGEN_NO_DETAIL
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namespace detail { namespace overlay
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{
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template <typename Point1, typename Point2, typename E>
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inline bool approximately_equals(Point1 const& a, Point2 const& b,
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E const& epsilon_multiplier)
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{
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using coor_t = typename select_coordinate_type<Point1, Point2>::type;
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using calc_t = typename geometry::select_most_precise<coor_t, E>::type;
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calc_t const& a0 = geometry::get<0>(a);
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calc_t const& b0 = geometry::get<0>(b);
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calc_t const& a1 = geometry::get<1>(a);
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calc_t const& b1 = geometry::get<1>(b);
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math::detail::equals_factor_policy<calc_t> policy(a0, b0, a1, b1);
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policy.multiply_epsilon(epsilon_multiplier);
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return math::detail::equals_by_policy(a0, b0, policy)
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&& math::detail::equals_by_policy(a1, b1, policy);
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}
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}} // namespace detail::overlay
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#endif //DOXYGEN_NO_DETAIL
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}} // namespace boost::geometry
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#endif // BOOST_GEOMETRY_ALGORITHMS_DETAIL_OVERLAY_APPROXIMATELY_EQUALS_HPP
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