Added thirdparty: boost library

2026-08-15 19:58:10 +00:00 · 2024-01-06 19:55:56 +02:00
parent bf49f439e1
commit bccd1e7051
15683 changed files with 3239840 additions and 0 deletions
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+// Boost.Geometry
+
+// Copyright (c) 2018-2021 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_ALGORITHMS_DETAIL_ENVELOPE_AREAL_HPP
+#define BOOST_GEOMETRY_ALGORITHMS_DETAIL_ENVELOPE_AREAL_HPP
+
+#include <boost/geometry/core/cs.hpp>
+#include <boost/geometry/core/tags.hpp>
+
+#include <boost/geometry/iterators/segment_iterator.hpp>
+
+#include <boost/geometry/algorithms/detail/envelope/range.hpp>
+#include <boost/geometry/algorithms/detail/envelope/linear.hpp>
+
+#include <boost/geometry/algorithms/dispatch/envelope.hpp>
+
+#include <boost/geometry/views/reversible_view.hpp>
+
+namespace boost { namespace geometry
+{
+
+#ifndef DOXYGEN_NO_DETAIL
+namespace detail { namespace envelope
+{
+
+
+struct envelope_hole
+{
+    template <typename Range, typename Box, typename Strategies>
+    static inline void apply(Range const& range, Box& mbr, Strategies const& strategies)
+    {
+        // Reverse holes to avoid calculating the envelope for the outside
+        // in spherical and geographic coordinate systems
+        detail::clockwise_view
+            <
+                Range const,
+                geometry::point_order<Range>::value == counterclockwise
+                    ? clockwise : counterclockwise
+            > view(range);
+        strategies.envelope(range, mbr).apply(view, mbr);
+    }
+};
+
+struct envelope_polygon
+{
+    template <typename Polygon, typename Box, typename Strategy>
+    static inline void apply(Polygon const& polygon, Box& mbr, Strategy const& strategy)
+    {
+        typename ring_return_type<Polygon const>::type ext_ring
+            = exterior_ring(polygon);
+
+        if (geometry::is_empty(ext_ring))
+        {
+            // use dummy multi polygon to get the strategy because there is no multi ring concept
+            using strategy_t = decltype(strategy.envelope(detail::dummy_multi_polygon(),
+                                                          detail::dummy_box()));
+            // if the exterior ring is empty, consider the interior rings
+            envelope_multi_range
+                <
+                    envelope_hole
+                >::template apply<strategy_t>(interior_rings(polygon), mbr, strategy);
+        }
+        else
+        {
+            // otherwise, consider only the exterior ring
+            envelope_range::apply(ext_ring, mbr, strategy);
+        }
+    }
+};
+
+
+}} // namespace detail::envelope
+#endif // DOXYGEN_NO_DETAIL
+
+#ifndef DOXYGEN_NO_DISPATCH
+namespace dispatch
+{
+
+
+template <typename Ring>
+struct envelope<Ring, ring_tag>
+    : detail::envelope::envelope_range
+{};
+
+template <typename Polygon>
+struct envelope<Polygon, polygon_tag>
+    : detail::envelope::envelope_polygon
+{};
+
+template <typename MultiPolygon>
+struct envelope<MultiPolygon, multi_polygon_tag>
+    : detail::envelope::envelope_multi_range
+        <
+            detail::envelope::envelope_polygon
+        >
+{};
+
+
+} // namespace dispatch
+#endif // DOXYGEN_NO_DISPATCH
+
+
+}} // namespace boost::geometry
+
+#endif // BOOST_GEOMETRY_ALGORITHMS_DETAIL_ENVELOPE_AREAL_HPP