| // Boost.Geometry (aka GGL, Generic Geometry Library) |
| |
| // Copyright (c) 2007-2011 Barend Gehrels, 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_ALGORITHMS_DETAIL_OVERLAY_GET_INTERSECTION_POINTS_HPP |
| #define BOOST_GEOMETRY_ALGORITHMS_DETAIL_OVERLAY_GET_INTERSECTION_POINTS_HPP |
| |
| |
| #include <cstddef> |
| |
| #include <boost/geometry/algorithms/convert.hpp> |
| #include <boost/geometry/algorithms/detail/overlay/get_turns.hpp> |
| |
| #include <boost/geometry/geometries/segment.hpp> |
| |
| |
| namespace boost { namespace geometry |
| { |
| |
| |
| #ifndef DOXYGEN_NO_DETAIL |
| namespace detail { namespace get_intersection_points |
| { |
| |
| |
| template |
| < |
| typename Point1, |
| typename Point2, |
| typename TurnInfo |
| > |
| struct get_turn_without_info |
| { |
| typedef strategy_intersection |
| < |
| typename cs_tag<typename TurnInfo::point_type>::type, |
| Point1, |
| Point2, |
| typename TurnInfo::point_type |
| > si; |
| |
| typedef typename si::segment_intersection_strategy_type strategy; |
| |
| |
| |
| template <typename OutputIterator> |
| static inline OutputIterator apply( |
| Point1 const& pi, Point1 const& pj, Point1 const& pk, |
| Point2 const& qi, Point2 const& qj, Point2 const& qk, |
| TurnInfo const& tp_model, |
| OutputIterator out) |
| { |
| typedef model::referring_segment<Point1 const> segment_type1; |
| typedef model::referring_segment<Point1 const> segment_type2; |
| segment_type1 p1(pi, pj), p2(pj, pk); |
| segment_type2 q1(qi, qj), q2(qj, qk); |
| |
| // |
| typename strategy::return_type result = strategy::apply(p1, q1); |
| |
| for (std::size_t i = 0; i < result.template get<0>().count; i++) |
| { |
| |
| TurnInfo tp; |
| geometry::convert(result.template get<0>().intersections[i], tp.point); |
| *out++ = tp; |
| } |
| |
| return out; |
| } |
| }; |
| |
| }} // namespace detail::get_intersection_points |
| #endif // DOXYGEN_NO_DETAIL |
| |
| |
| |
| |
| template |
| < |
| typename Geometry1, |
| typename Geometry2, |
| typename Turns |
| > |
| inline void get_intersection_points(Geometry1 const& geometry1, |
| Geometry2 const& geometry2, |
| Turns& turns) |
| { |
| concept::check_concepts_and_equal_dimensions<Geometry1 const, Geometry2 const>(); |
| |
| typedef detail::get_intersection_points::get_turn_without_info |
| < |
| typename point_type<Geometry1>::type, |
| typename point_type<Geometry2>::type, |
| typename boost::range_value<Turns>::type |
| > TurnPolicy; |
| |
| typedef typename strategy_intersection |
| < |
| typename cs_tag<Geometry1>::type, |
| Geometry1, |
| Geometry2, |
| typename boost::range_value<Turns>::type |
| >::segment_intersection_strategy_type segment_intersection_strategy_type; |
| |
| detail::get_turns::no_interrupt_policy interrupt_policy; |
| |
| boost::mpl::if_c |
| < |
| reverse_dispatch<Geometry1, Geometry2>::type::value, |
| dispatch::get_turns_reversed |
| < |
| typename tag<Geometry1>::type, |
| typename tag<Geometry2>::type, |
| Geometry1, Geometry2, |
| false, false, |
| Turns, TurnPolicy, |
| //segment_intersection_strategy_type, |
| detail::get_turns::no_interrupt_policy |
| >, |
| dispatch::get_turns |
| < |
| typename tag<Geometry1>::type, |
| typename tag<Geometry2>::type, |
| Geometry1, Geometry2, |
| false, false, |
| Turns, TurnPolicy, |
| //segment_intersection_strategy_type, |
| detail::get_turns::no_interrupt_policy |
| > |
| >::type::apply( |
| 0, geometry1, |
| 1, geometry2, |
| turns, interrupt_policy); |
| } |
| |
| |
| |
| |
| }} // namespace boost::geometry |
| |
| #endif // BOOST_GEOMETRY_ALGORITHMS_DETAIL_OVERLAY_GET_INTERSECTION_POINTS_HPP |