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+// Boost.Geometry (aka GGL, Generic Geometry Library)
+
+// Copyright (c) 2018, Oracle and/or its affiliates.
+
+// Contributed and/or modified by Vissarion Fysikopoulos, on behalf of Oracle
+
+// Licensed under the Boost Software License version 1.0.
+// http://www.boost.org/users/license.html
+
+#ifndef BOOST_GEOMETRY_ALGORITHMS_DETAIL_DISTANCE_LINEAR_TO_BOX_HPP
+#define BOOST_GEOMETRY_ALGORITHMS_DETAIL_DISTANCE_LINEAR_TO_BOX_HPP
+
+#include <boost/geometry/core/point_type.hpp>
+
+#include <boost/geometry/algorithms/intersects.hpp>
+
+namespace boost { namespace geometry
+{
+
+#ifndef DOXYGEN_NO_DETAIL
+namespace detail { namespace distance
+{
+
+template <typename Linear, typename Box, typename Strategy>
+struct linear_to_box
+{
+ typedef typename strategy::distance::services::return_type
+ <
+ Strategy,
+ typename point_type<Linear>::type,
+ typename point_type<Box>::type
+ >::type return_type;
+
+ template <typename Iterator>
+ static inline return_type apply(Box const& box,
+ Iterator begin,
+ Iterator end,
+ Strategy const& strategy)
+ {
+ bool first = true;
+ return_type d_min(0);
+ for (Iterator it = begin; it != end; ++it, first = false)
+ {
+ typedef typename std::iterator_traits<Iterator>::value_type
+ Segment;
+
+ return_type d = dispatch::distance<Segment, Box, Strategy>
+ ::apply(*it, box, strategy);
+
+ if ( first || d < d_min )
+ {
+ d_min = d;
+ }
+ }
+ return d_min;
+ }
+
+ static inline return_type apply(Linear const& linear,
+ Box const& box,
+ Strategy const& strategy)
+ {
+ if ( geometry::intersects(linear, box) )
+ {
+ return 0;
+ }
+
+ return apply(box,
+ geometry::segments_begin(linear),
+ geometry::segments_end(linear),
+ strategy);
+ }
+
+
+ static inline return_type apply(Box const& box,
+ Linear const& linear,
+ Strategy const& strategy)
+ {
+ return apply(linear, box, strategy);
+ }
+};
+
+}} // namespace detail::distance
+#endif // DOXYGEN_NO_DETAIL
+
+
+#ifndef DOXYGEN_NO_DISPATCH
+namespace dispatch
+{
+
+template <typename Linear, typename Box, typename Strategy>
+struct distance
+ <
+ Linear, Box, Strategy,
+ linear_tag, box_tag,
+ strategy_tag_distance_segment_box, false
+ >
+ : detail::distance::linear_to_box
+ <
+ Linear, Box, Strategy
+ >
+{};
+
+
+template <typename Areal, typename Box, typename Strategy>
+struct distance
+ <
+ Areal, Box, Strategy,
+ areal_tag, box_tag,
+ strategy_tag_distance_segment_box, false
+ >
+ : detail::distance::linear_to_box
+ <
+ Areal, Box, Strategy
+ >
+{};
+
+
+} // namespace dispatch
+#endif // DOXYGEN_NO_DISPATCH
+
+}} // namespace boost::geometry
+
+#endif // BOOST_GEOMETRY_ALGORITHMS_DETAIL_DISTANCE_LINEAR_TO_BOX_HPP