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- // Boost.Geometry (aka GGL, Generic Geometry Library)
- // Copyright (c) 2007-2014 Barend Gehrels, Amsterdam, the Netherlands.
- // Copyright (c) 2008-2014 Bruno Lalande, Paris, France.
- // Copyright (c) 2009-2014 Mateusz Loskot, London, UK.
- // Copyright (c) 2014 Adam Wulkiewicz, Lodz, Poland.
- // This file was modified by Oracle on 2014.
- // Modifications copyright (c) 2014, Oracle and/or its affiliates.
- // Contributed and/or modified by Menelaos Karavelas, on behalf of Oracle
- // 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_GEOMETRIES_POINT_HPP
- #define BOOST_GEOMETRY_GEOMETRIES_POINT_HPP
- #include <cstddef>
- #include <boost/config.hpp>
- #include <boost/mpl/assert.hpp>
- #include <boost/mpl/int.hpp>
- #include <boost/geometry/core/access.hpp>
- #include <boost/geometry/core/assert.hpp>
- #include <boost/geometry/core/coordinate_type.hpp>
- #include <boost/geometry/core/coordinate_system.hpp>
- #include <boost/geometry/core/coordinate_dimension.hpp>
- #if defined(BOOST_GEOMETRY_ENABLE_ACCESS_DEBUGGING)
- #include <algorithm>
- #include <boost/geometry/core/assert.hpp>
- #endif
- namespace boost { namespace geometry
- {
- // Silence warning C4127: conditional expression is constant
- #if defined(_MSC_VER)
- #pragma warning(push)
- #pragma warning(disable : 4127)
- #endif
- namespace model
- {
- namespace detail
- {
- template <std::size_t DimensionCount, std::size_t Index>
- struct array_assign
- {
- template <typename T>
- static inline void apply(T values[], T const& value)
- {
- values[Index] = value;
- }
- };
- // Specialization avoiding assigning element [2] for only 2 dimensions
- template <> struct array_assign<2, 2>
- {
- template <typename T> static inline void apply(T [], T const& ) {}
- };
- // Specialization avoiding assigning elements for (rarely used) points in 1 dim
- template <> struct array_assign<1, 1>
- {
- template <typename T> static inline void apply(T [], T const& ) {}
- };
- template <> struct array_assign<1, 2>
- {
- template <typename T> static inline void apply(T [], T const& ) {}
- };
- }
- /*!
- \brief Basic point class, having coordinates defined in a neutral way
- \details Defines a neutral point class, fulfilling the Point Concept.
- Library users can use this point class, or use their own point classes.
- This point class is used in most of the samples and tests of Boost.Geometry
- This point class is used occasionally within the library, where a temporary
- point class is necessary.
- \ingroup geometries
- \tparam CoordinateType \tparam_numeric
- \tparam DimensionCount number of coordinates, usually 2 or 3
- \tparam CoordinateSystem coordinate system, for example cs::cartesian
- \qbk{[include reference/geometries/point.qbk]}
- \qbk{before.synopsis, [heading Model of]}
- \qbk{before.synopsis, [link geometry.reference.concepts.concept_point Point Concept]}
- */
- template
- <
- typename CoordinateType,
- std::size_t DimensionCount,
- typename CoordinateSystem
- >
- class point
- {
- BOOST_MPL_ASSERT_MSG((DimensionCount >= 1),
- DIMENSION_GREATER_THAN_ZERO_EXPECTED,
- (boost::mpl::int_<DimensionCount>));
- // The following enum is used to fully instantiate the
- // CoordinateSystem class and check the correctness of the units
- // passed for non-Cartesian coordinate systems.
- enum { cs_check = sizeof(CoordinateSystem) };
- public:
- #if !defined(BOOST_GEOMETRY_ENABLE_ACCESS_DEBUGGING)
- #if !defined(BOOST_NO_CXX11_DEFAULTED_FUNCTIONS)
- /// \constructor_default_no_init
- point() = default;
- #else
- /// \constructor_default_no_init
- inline point()
- {}
- #endif
- #else // defined(BOOST_GEOMETRY_ENABLE_ACCESS_DEBUGGING)
- point()
- {
- m_created = 1;
- std::fill_n(m_values_initialized, DimensionCount, 0);
- }
- ~point()
- {
- m_created = 0;
- std::fill_n(m_values_initialized, DimensionCount, 0);
- }
- #endif
- /// @brief Constructor to set one value
- explicit inline point(CoordinateType const& v0)
- {
- detail::array_assign<DimensionCount, 0>::apply(m_values, v0);
- detail::array_assign<DimensionCount, 1>::apply(m_values, CoordinateType());
- detail::array_assign<DimensionCount, 2>::apply(m_values, CoordinateType());
- #if defined(BOOST_GEOMETRY_ENABLE_ACCESS_DEBUGGING)
- m_created = 1;
- std::fill_n(m_values_initialized, (std::min)(std::size_t(3), DimensionCount), 1);
- #endif
- }
- /// @brief Constructor to set two values
- inline point(CoordinateType const& v0, CoordinateType const& v1)
- {
- detail::array_assign<DimensionCount, 0>::apply(m_values, v0);
- detail::array_assign<DimensionCount, 1>::apply(m_values, v1);
- detail::array_assign<DimensionCount, 2>::apply(m_values, CoordinateType());
- #if defined(BOOST_GEOMETRY_ENABLE_ACCESS_DEBUGGING)
- m_created = 1;
- std::fill_n(m_values_initialized, (std::min)(std::size_t(3), DimensionCount), 1);
- #endif
- }
- /// @brief Constructor to set three values
- inline point(CoordinateType const& v0, CoordinateType const& v1,
- CoordinateType const& v2)
- {
- detail::array_assign<DimensionCount, 0>::apply(m_values, v0);
- detail::array_assign<DimensionCount, 1>::apply(m_values, v1);
- detail::array_assign<DimensionCount, 2>::apply(m_values, v2);
- #if defined(BOOST_GEOMETRY_ENABLE_ACCESS_DEBUGGING)
- m_created = 1;
- std::fill_n(m_values_initialized, (std::min)(std::size_t(3), DimensionCount), 1);
- #endif
- }
- /// @brief Get a coordinate
- /// @tparam K coordinate to get
- /// @return the coordinate
- template <std::size_t K>
- inline CoordinateType const& get() const
- {
- #if defined(BOOST_GEOMETRY_ENABLE_ACCESS_DEBUGGING)
- BOOST_GEOMETRY_ASSERT(m_created == 1);
- BOOST_GEOMETRY_ASSERT(m_values_initialized[K] == 1);
- #endif
- BOOST_STATIC_ASSERT(K < DimensionCount);
- return m_values[K];
- }
- /// @brief Set a coordinate
- /// @tparam K coordinate to set
- /// @param value value to set
- template <std::size_t K>
- inline void set(CoordinateType const& value)
- {
- #if defined(BOOST_GEOMETRY_ENABLE_ACCESS_DEBUGGING)
- BOOST_GEOMETRY_ASSERT(m_created == 1);
- m_values_initialized[K] = 1;
- #endif
- BOOST_STATIC_ASSERT(K < DimensionCount);
- m_values[K] = value;
- }
- private:
- CoordinateType m_values[DimensionCount];
- #if defined(BOOST_GEOMETRY_ENABLE_ACCESS_DEBUGGING)
- int m_created;
- int m_values_initialized[DimensionCount];
- #endif
- };
- } // namespace model
- // Adapt the point to the concept
- #ifndef DOXYGEN_NO_TRAITS_SPECIALIZATIONS
- namespace traits
- {
- template
- <
- typename CoordinateType,
- std::size_t DimensionCount,
- typename CoordinateSystem
- >
- struct tag<model::point<CoordinateType, DimensionCount, CoordinateSystem> >
- {
- typedef point_tag type;
- };
- template
- <
- typename CoordinateType,
- std::size_t DimensionCount,
- typename CoordinateSystem
- >
- struct coordinate_type<model::point<CoordinateType, DimensionCount, CoordinateSystem> >
- {
- typedef CoordinateType type;
- };
- template
- <
- typename CoordinateType,
- std::size_t DimensionCount,
- typename CoordinateSystem
- >
- struct coordinate_system<model::point<CoordinateType, DimensionCount, CoordinateSystem> >
- {
- typedef CoordinateSystem type;
- };
- template
- <
- typename CoordinateType,
- std::size_t DimensionCount,
- typename CoordinateSystem
- >
- struct dimension<model::point<CoordinateType, DimensionCount, CoordinateSystem> >
- : boost::mpl::int_<DimensionCount>
- {};
- template
- <
- typename CoordinateType,
- std::size_t DimensionCount,
- typename CoordinateSystem,
- std::size_t Dimension
- >
- struct access<model::point<CoordinateType, DimensionCount, CoordinateSystem>, Dimension>
- {
- static inline CoordinateType get(
- model::point<CoordinateType, DimensionCount, CoordinateSystem> const& p)
- {
- return p.template get<Dimension>();
- }
- static inline void set(
- model::point<CoordinateType, DimensionCount, CoordinateSystem>& p,
- CoordinateType const& value)
- {
- p.template set<Dimension>(value);
- }
- };
- } // namespace traits
- #endif // DOXYGEN_NO_TRAITS_SPECIALIZATIONS
- #if defined(_MSC_VER)
- #pragma warning(pop)
- #endif
- }} // namespace boost::geometry
- #endif // BOOST_GEOMETRY_GEOMETRIES_POINT_HPP
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