Added boost header

test/external/boost/geometry/core/cs.hpp

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+// Boost.Geometry (aka GGL, Generic Geometry Library)
+
+// Copyright (c) 2007-2011 Barend Gehrels, Amsterdam, the Netherlands.
+// Copyright (c) 2008-2011 Bruno Lalande, Paris, France.
+// Copyright (c) 2009-2011 Mateusz Loskot, London, UK.
+
+// 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_CS_HPP
+#define BOOST_GEOMETRY_CORE_CS_HPP
+
+#include <cstddef>
+
+#include <boost/type_traits.hpp>
+
+#include <boost/geometry/core/coordinate_system.hpp>
+#include <boost/geometry/core/tags.hpp>
+
+
+namespace boost { namespace geometry
+{
+
+/*!
+\brief Unit of plane angle: Degrees
+\details Tag defining the unit of plane angle for spherical coordinate systems.
+    This tag specifies that coordinates are defined in degrees (-180 .. 180). 
+    It has to be specified for some coordinate systems.
+\qbk{[include reference/core/degree_radian.qbk]}
+*/
+struct degree {};
+
+
+/*!
+\brief Unit of plane angle: Radians
+\details Tag defining the unit of plane angle for spherical coordinate systems.
+    This tag specifies that coordinates are defined in radians (-PI .. PI). 
+    It has to be specified for some coordinate systems.
+\qbk{[include reference/core/degree_radian.qbk]}
+*/
+struct radian {};
+
+
+namespace cs
+{
+
+/*!
+\brief Cartesian coordinate system
+\details Defines the Cartesian or rectangular coordinate system
+    where points are defined in 2 or 3 (or more)
+dimensions and usually (but not always) known as x,y,z
+\see http://en.wikipedia.org/wiki/Cartesian_coordinate_system
+\ingroup cs
+*/
+struct cartesian {};
+
+
+
+
+/*!
+\brief Geographic coordinate system, in degree or in radian
+\details Defines the geographic coordinate system where points
+    are defined in two angles and usually
+known as lat,long or lo,la or phi,lambda
+\see http://en.wikipedia.org/wiki/Geographic_coordinate_system
+\ingroup cs
+\note might be moved to extensions/gis/geographic
+*/
+template<typename DegreeOrRadian>
+struct geographic
+{
+    typedef DegreeOrRadian units;
+};
+
+
+
+/*!
+\brief Spherical (polar) coordinate system, in degree or in radian
+\details Defines the spherical coordinate system where points are
+    defined in two angles
+    and an optional radius usually known as r, theta, phi
+\par Coordinates:
+- coordinate 0:
+    0 <= phi < 2pi is the angle between the positive x-axis and the
+        line from the origin to the P projected onto the xy-plane.
+- coordinate 1:
+    0 <= theta <= pi is the angle between the positive z-axis and the
+        line formed between the origin and P.
+- coordinate 2 (if specified):
+    r >= 0 is the distance from the origin to a given point P.
+
+\see http://en.wikipedia.org/wiki/Spherical_coordinates
+\ingroup cs
+*/
+template<typename DegreeOrRadian>
+struct spherical
+{
+    typedef DegreeOrRadian units;
+};
+
+
+/*!
+\brief Spherical equatorial coordinate system, in degree or in radian
+\details This one resembles the geographic coordinate system, and has latitude
+    up from zero at the equator, to 90 at the pole 
+    (opposite to the spherical(polar) coordinate system).
+    Used in astronomy and in GIS (but there is also the geographic)
+
+\see http://en.wikipedia.org/wiki/Spherical_coordinates
+\ingroup cs
+*/
+template<typename DegreeOrRadian>
+struct spherical_equatorial
+{
+    typedef DegreeOrRadian units;
+};
+
+
+
+/*!
+\brief Polar coordinate system
+\details Defines the polar coordinate system "in which each point
+    on a plane is determined by an angle and a distance"
+\see http://en.wikipedia.org/wiki/Polar_coordinates
+\ingroup cs
+*/
+template<typename DegreeOrRadian>
+struct polar
+{
+    typedef DegreeOrRadian units;
+};
+
+
+} // namespace cs
+
+
+namespace traits
+{
+
+/*!
+\brief Traits class defining coordinate system tag, bound to coordinate system
+\ingroup traits
+\tparam CoordinateSystem coordinate system
+*/
+template <typename CoordinateSystem>
+struct cs_tag
+{
+};
+
+
+#ifndef DOXYGEN_NO_TRAITS_SPECIALIZATIONS
+
+template<typename DegreeOrRadian>
+struct cs_tag<cs::geographic<DegreeOrRadian> >
+{
+    typedef geographic_tag type;
+};
+
+template<typename DegreeOrRadian>
+struct cs_tag<cs::spherical<DegreeOrRadian> >
+{
+    typedef spherical_polar_tag type;
+};
+
+template<typename DegreeOrRadian>
+struct cs_tag<cs::spherical_equatorial<DegreeOrRadian> >
+{
+    typedef spherical_equatorial_tag type;
+};
+
+
+template<>
+struct cs_tag<cs::cartesian>
+{
+    typedef cartesian_tag type;
+};
+
+
+#endif // DOXYGEN_NO_TRAITS_SPECIALIZATIONS
+} // namespace traits
+
+/*!
+\brief Meta-function returning coordinate system tag (cs family) of any geometry
+\ingroup core
+*/
+template <typename G>
+struct cs_tag
+{
+    typedef typename traits::cs_tag
+        <
+            typename geometry::coordinate_system<G>::type
+        >::type type;
+};
+
+
+/*!
+\brief Meta-function to verify if a coordinate system is radian
+\ingroup core
+*/
+template <typename CoordinateSystem>
+struct is_radian : boost::true_type {};
+
+
+#ifndef DOXYGEN_NO_SPECIALIZATIONS
+
+// Specialization for any degree coordinate systems
+template <template<typename> class CoordinateSystem>
+struct is_radian< CoordinateSystem<degree> > : boost::false_type
+{
+};
+
+#endif // DOXYGEN_NO_SPECIALIZATIONS
+
+}} // namespace boost::geometry
+
+#endif // BOOST_GEOMETRY_CORE_CS_HPP