add boost on mac

macx64/include/boost/geometry/formulas/meridian_segment.hpp

@@ -0,0 +1,72 @@
+// Boost.Geometry
+
+// Copyright (c) 2017-2018 Oracle and/or its affiliates.
+
+// Contributed and/or modified by Vissarion Fysikopoulos, on behalf of Oracle
+// 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_FORMULAS_MERIDIAN_SEGMENT_HPP
+#define BOOST_GEOMETRY_FORMULAS_MERIDIAN_SEGMENT_HPP
+
+#include <boost/math/constants/constants.hpp>
+
+#include <boost/geometry/core/radius.hpp>
+
+#include <boost/geometry/util/condition.hpp>
+#include <boost/geometry/util/math.hpp>
+#include <boost/geometry/util/normalize_spheroidal_coordinates.hpp>
+
+namespace boost { namespace geometry { namespace formula
+{
+
+/*!
+\brief Test if a segment is meridian or not.
+*/
+
+class meridian_segment
+{
+
+public :
+
+    enum SegmentType {NonMeridian, MeridianCrossingPole, MeridianNotCrossingPole};
+
+    template <typename T>
+    static inline SegmentType is_meridian(T lon1, T lat1, T lon2, T lat2)
+    {
+        SegmentType res = NonMeridian;
+        T diff = geometry::math::longitude_distance_signed<geometry::radian>(lon1, lon2);
+
+        if ( meridian_not_crossing_pole(lat1, lat2, diff) )
+        {
+            res = MeridianNotCrossingPole;
+        }
+        else if ( meridian_crossing_pole(diff) )
+        {
+            res = MeridianCrossingPole;
+        }
+        return res;
+    }
+
+    template <typename T>
+    static bool meridian_not_crossing_pole(T lat1, T lat2, T diff)
+    {
+        T half_pi = math::half_pi<T>();
+        return math::equals(diff, T(0)) ||
+               (math::equals(lat2, half_pi) && math::equals(lat1, -half_pi));
+    }
+
+    template <typename T>
+    static bool meridian_crossing_pole(T diff)
+    {
+        return math::equals(math::abs(diff), math::pi<T>());
+    }
+
+};
+
+}}} // namespace boost::geometry::formula
+
+#endif //BOOST_GEOMETRY_FORMULAS_MERIDIAN_SEGMENT_HPP