288 lines
9.3 KiB
C++
288 lines
9.3 KiB
C++
// Boost.Geometry (aka GGL, Generic Geometry Library)
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// Copyright (c) 2007-2014 Barend Gehrels, Amsterdam, the Netherlands.
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// Copyright (c) 2008-2014 Bruno Lalande, Paris, France.
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// Copyright (c) 2009-2014 Mateusz Loskot, London, UK.
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// This file was modified by Oracle on 2014-2021.
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// Modifications copyright (c) 2014-2021, Oracle and/or its affiliates.
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// Contributed and/or modified by Menelaos Karavelas, on behalf of Oracle
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// Contributed and/or modified by Adam Wulkiewicz, on behalf of Oracle
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// Parts of Boost.Geometry are redesigned from Geodan's Geographic Library
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// (geolib/GGL), copyright (c) 1995-2010 Geodan, Amsterdam, the Netherlands.
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// Use, modification and distribution is subject to the Boost Software License,
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// Version 1.0. (See accompanying file LICENSE_1_0.txt or copy at
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// http://www.boost.org/LICENSE_1_0.txt)
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#ifndef BOOST_GEOMETRY_ALGORITHMS_APPEND_HPP
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#define BOOST_GEOMETRY_ALGORITHMS_APPEND_HPP
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#include <boost/range/begin.hpp>
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#include <boost/range/end.hpp>
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#include <boost/range/value_type.hpp>
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#include <boost/geometry/algorithms/num_interior_rings.hpp>
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#include <boost/geometry/algorithms/detail/convert_point_to_point.hpp>
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#include <boost/geometry/algorithms/detail/signed_size_type.hpp>
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#include <boost/geometry/core/access.hpp>
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#include <boost/geometry/core/mutable_range.hpp>
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#include <boost/geometry/core/point_type.hpp>
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#include <boost/geometry/core/tags.hpp>
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#include <boost/geometry/core/visit.hpp>
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#include <boost/geometry/geometries/adapted/boost_variant.hpp> // for backward compatibility
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#include <boost/geometry/geometries/concepts/check.hpp>
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#include <boost/geometry/util/range.hpp>
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namespace boost { namespace geometry
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{
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#ifndef DOXYGEN_NO_DETAIL
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namespace detail { namespace append
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{
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struct append_no_action
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{
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template <typename Geometry, typename Point>
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static inline void apply(Geometry& , Point const& ,
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signed_size_type = -1, signed_size_type = 0)
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{
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}
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};
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struct to_range_point
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{
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template <typename Geometry, typename Point>
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static inline void apply(Geometry& geometry, Point const& point,
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signed_size_type = -1, signed_size_type = 0)
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{
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typename geometry::point_type<Geometry>::type copy;
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geometry::detail::conversion::convert_point_to_point(point, copy);
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traits::push_back<Geometry>::apply(geometry, copy);
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}
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};
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struct to_range_range
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{
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template <typename Geometry, typename Range>
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static inline void apply(Geometry& geometry, Range const& range,
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signed_size_type = -1, signed_size_type = 0)
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{
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using point_type = typename boost::range_value<Range>::type;
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auto const end = boost::end(range);
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for (auto it = boost::begin(range); it != end; ++it)
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{
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to_range_point::apply<Geometry, point_type>(geometry, *it);
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}
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}
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};
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struct to_polygon_point
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{
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template <typename Polygon, typename Point>
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static inline void apply(Polygon& polygon, Point const& point,
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signed_size_type ring_index, signed_size_type = 0)
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{
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using ring_type = typename ring_type<Polygon>::type;
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using exterior_ring_type = typename ring_return_type<Polygon>::type;
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using interior_ring_range_type = typename interior_return_type<Polygon>::type;
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if (ring_index == -1)
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{
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exterior_ring_type ext_ring = exterior_ring(polygon);
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to_range_point::apply<ring_type, Point>(ext_ring, point);
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}
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else if (ring_index < signed_size_type(num_interior_rings(polygon)))
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{
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interior_ring_range_type int_rings = interior_rings(polygon);
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to_range_point::apply<ring_type, Point>(range::at(int_rings, ring_index), point);
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}
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}
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};
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struct to_polygon_range
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{
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template <typename Polygon, typename Range>
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static inline void apply(Polygon& polygon, Range const& range,
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signed_size_type ring_index, signed_size_type = 0)
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{
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using ring_type = typename ring_type<Polygon>::type;
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using exterior_ring_type = typename ring_return_type<Polygon>::type;
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using interior_ring_range_type = typename interior_return_type<Polygon>::type;
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if (ring_index == -1)
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{
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exterior_ring_type ext_ring = exterior_ring(polygon);
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to_range_range::apply<ring_type, Range>(ext_ring, range);
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}
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else if (ring_index < signed_size_type(num_interior_rings(polygon)))
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{
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interior_ring_range_type int_rings = interior_rings(polygon);
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to_range_range::apply<ring_type, Range>(range::at(int_rings, ring_index), range);
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}
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}
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};
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template <typename Policy>
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struct to_multigeometry
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{
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template <typename MultiGeometry, typename RangeOrPoint>
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static inline void apply(MultiGeometry& multigeometry,
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RangeOrPoint const& range_or_point,
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signed_size_type ring_index, signed_size_type multi_index)
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{
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Policy::template apply
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<
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typename boost::range_value<MultiGeometry>::type,
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RangeOrPoint
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>(range::at(multigeometry, multi_index), range_or_point, ring_index);
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}
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};
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}} // namespace detail::append
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#endif // DOXYGEN_NO_DETAIL
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#ifndef DOXYGEN_NO_DISPATCH
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namespace dispatch
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{
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template
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<
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typename Geometry,
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typename RangeOrPoint,
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typename Tag = typename geometry::tag<Geometry>::type,
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typename OtherTag = typename geometry::tag<RangeOrPoint>::type
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>
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struct append
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: detail::append::append_no_action
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{};
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template <typename Geometry, typename Point>
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struct append<Geometry, Point, linestring_tag, point_tag>
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: detail::append::to_range_point
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{};
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template <typename Geometry, typename Point>
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struct append<Geometry, Point, ring_tag, point_tag>
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: detail::append::to_range_point
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{};
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template <typename Polygon, typename Point>
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struct append<Polygon, Point, polygon_tag, point_tag>
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: detail::append::to_polygon_point
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{};
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template <typename Geometry, typename Range, typename RangeTag>
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struct append<Geometry, Range, linestring_tag, RangeTag>
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: detail::append::to_range_range
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{};
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template <typename Geometry, typename Range, typename RangeTag>
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struct append<Geometry, Range, ring_tag, RangeTag>
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: detail::append::to_range_range
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{};
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template <typename Polygon, typename Range, typename RangeTag>
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struct append<Polygon, Range, polygon_tag, RangeTag>
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: detail::append::to_polygon_range
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{};
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template <typename Geometry, typename Point>
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struct append<Geometry, Point, multi_point_tag, point_tag>
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: detail::append::to_range_point
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{};
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template <typename Geometry, typename Range, typename RangeTag>
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struct append<Geometry, Range, multi_point_tag, RangeTag>
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: detail::append::to_range_range
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{};
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template <typename MultiGeometry, typename Point>
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struct append<MultiGeometry, Point, multi_linestring_tag, point_tag>
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: detail::append::to_multigeometry<detail::append::to_range_point>
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{};
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template <typename MultiGeometry, typename Range, typename RangeTag>
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struct append<MultiGeometry, Range, multi_linestring_tag, RangeTag>
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: detail::append::to_multigeometry<detail::append::to_range_range>
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{};
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template <typename MultiGeometry, typename Point>
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struct append<MultiGeometry, Point, multi_polygon_tag, point_tag>
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: detail::append::to_multigeometry<detail::append::to_polygon_point>
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{};
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template <typename MultiGeometry, typename Range, typename RangeTag>
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struct append<MultiGeometry, Range, multi_polygon_tag, RangeTag>
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: detail::append::to_multigeometry<detail::append::to_polygon_range>
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{};
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template <typename Geometry, typename RangeOrPoint, typename OtherTag>
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struct append<Geometry, RangeOrPoint, dynamic_geometry_tag, OtherTag>
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{
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static inline void apply(Geometry& geometry,
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RangeOrPoint const& range_or_point,
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signed_size_type ring_index, signed_size_type multi_index)
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{
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traits::visit<Geometry>::apply([&](auto & g)
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{
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append
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<
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std::remove_reference_t<decltype(g)>, RangeOrPoint
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>::apply(g, range_or_point, ring_index, multi_index);
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}, geometry);
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}
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};
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// TODO: It's unclear how append should work for GeometryCollection because
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// it can hold multiple different geometries.
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} // namespace dispatch
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#endif // DOXYGEN_NO_DISPATCH
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/*!
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\brief Appends one or more points to a linestring, ring, polygon, multi-geometry
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\ingroup append
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\tparam Geometry \tparam_geometry
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\tparam RangeOrPoint Either a range or a point, fullfilling Boost.Range concept or Boost.Geometry Point Concept
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\param geometry \param_geometry
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\param range_or_point The point or range to add
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\param ring_index The index of the ring in case of a polygon:
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exterior ring (-1, the default) or interior ring index
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\param multi_index The index of the geometry to which the points are appended
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\qbk{[include reference/algorithms/append.qbk]}
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}
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*/
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template <typename Geometry, typename RangeOrPoint>
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inline void append(Geometry& geometry, RangeOrPoint const& range_or_point,
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signed_size_type ring_index = -1, signed_size_type multi_index = 0)
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{
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concepts::check<Geometry>();
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dispatch::append
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<
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Geometry, RangeOrPoint
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>::apply(geometry, range_or_point, ring_index, multi_index);
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}
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}} // namespace boost::geometry
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#endif // BOOST_GEOMETRY_ALGORITHMS_APPEND_HPP
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