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371 lines
11 KiB
C++
371 lines
11 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.
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// Modifications copyright (c) 2014, 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.hpp>
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#include <boost/variant/apply_visitor.hpp>
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#include <boost/variant/static_visitor.hpp>
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#include <boost/variant/variant_fwd.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/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/geometries/concepts/check.hpp>
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#include <boost/geometry/geometries/variant.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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template <typename Geometry, typename Point>
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struct append_no_action
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{
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static inline void apply(Geometry& , Point const& ,
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int = 0, int = 0)
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{
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}
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};
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template <typename Geometry, typename Point>
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struct append_point
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{
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static inline void apply(Geometry& geometry, Point const& point,
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int = 0, int = 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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template <typename Geometry, typename Range>
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struct append_range
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{
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typedef typename boost::range_value<Range>::type point_type;
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static inline void apply(Geometry& geometry, Range const& range,
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int = 0, int = 0)
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{
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for (typename boost::range_iterator<Range const>::type
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it = boost::begin(range);
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it != boost::end(range);
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++it)
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{
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append_point<Geometry, point_type>::apply(geometry, *it);
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}
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}
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};
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template <typename Polygon, typename Point>
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struct point_to_polygon
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{
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typedef typename ring_type<Polygon>::type ring_type;
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static inline void apply(Polygon& polygon, Point const& point,
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int ring_index, int = 0)
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{
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if (ring_index == -1)
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{
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append_point<ring_type, Point>::apply(
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exterior_ring(polygon), point);
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}
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else if (ring_index < int(num_interior_rings(polygon)))
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{
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append_point<ring_type, Point>::apply(
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range::at(interior_rings(polygon), ring_index), point);
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}
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}
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};
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template <typename Polygon, typename Range>
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struct range_to_polygon
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{
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typedef typename ring_type<Polygon>::type ring_type;
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static inline void apply(Polygon& polygon, Range const& range,
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int ring_index, int = 0)
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{
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if (ring_index == -1)
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{
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append_range<ring_type, Range>::apply(
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exterior_ring(polygon), range);
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}
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else if (ring_index < int(num_interior_rings(polygon)))
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{
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append_range<ring_type, Range>::apply(
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range::at(interior_rings(polygon), ring_index), range);
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}
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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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namespace splitted_dispatch
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{
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template <typename Tag, typename Geometry, typename Point>
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struct append_point
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: detail::append::append_no_action<Geometry, Point>
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{};
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template <typename Geometry, typename Point>
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struct append_point<linestring_tag, Geometry, Point>
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: detail::append::append_point<Geometry, Point>
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{};
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template <typename Geometry, typename Point>
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struct append_point<ring_tag, Geometry, Point>
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: detail::append::append_point<Geometry, Point>
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{};
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template <typename Polygon, typename Point>
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struct append_point<polygon_tag, Polygon, Point>
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: detail::append::point_to_polygon<Polygon, Point>
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{};
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template <typename Tag, typename Geometry, typename Range>
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struct append_range
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: detail::append::append_no_action<Geometry, Range>
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{};
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template <typename Geometry, typename Range>
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struct append_range<linestring_tag, Geometry, Range>
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: detail::append::append_range<Geometry, Range>
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{};
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template <typename Geometry, typename Range>
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struct append_range<ring_tag, Geometry, Range>
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: detail::append::append_range<Geometry, Range>
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{};
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template <typename Polygon, typename Range>
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struct append_range<polygon_tag, Polygon, Range>
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: detail::append::range_to_polygon<Polygon, Range>
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{};
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} // namespace splitted_dispatch
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// Default: append a range (or linestring or ring or whatever) to any geometry
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template
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<
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typename Geometry, typename RangeOrPoint,
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typename TagRangeOrPoint = typename tag<RangeOrPoint>::type
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>
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struct append
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: splitted_dispatch::append_range<typename tag<Geometry>::type, Geometry, RangeOrPoint>
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{};
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// Specialization for point to append a point to any geometry
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template <typename Geometry, typename RangeOrPoint>
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struct append<Geometry, RangeOrPoint, point_tag>
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: splitted_dispatch::append_point<typename tag<Geometry>::type, Geometry, RangeOrPoint>
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{};
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} // namespace dispatch
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#endif // DOXYGEN_NO_DISPATCH
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#ifndef DOXYGEN_NO_DETAIL
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namespace detail { namespace append
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{
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template <typename MultiGeometry, typename RangeOrPoint>
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struct append_to_multigeometry
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{
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static inline void apply(MultiGeometry& multigeometry,
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RangeOrPoint const& range_or_point,
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int ring_index, int multi_index)
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{
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dispatch::append
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<
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typename boost::range_value<MultiGeometry>::type,
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RangeOrPoint
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>::apply(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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namespace splitted_dispatch
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{
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template <typename Geometry, typename Point>
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struct append_point<multi_point_tag, Geometry, Point>
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: detail::append::append_point<Geometry, Point>
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{};
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template <typename Geometry, typename Range>
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struct append_range<multi_point_tag, Geometry, Range>
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: detail::append::append_range<Geometry, Range>
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{};
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template <typename MultiGeometry, typename RangeOrPoint>
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struct append_point<multi_linestring_tag, MultiGeometry, RangeOrPoint>
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: detail::append::append_to_multigeometry<MultiGeometry, RangeOrPoint>
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{};
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template <typename MultiGeometry, typename RangeOrPoint>
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struct append_range<multi_linestring_tag, MultiGeometry, RangeOrPoint>
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: detail::append::append_to_multigeometry<MultiGeometry, RangeOrPoint>
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{};
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template <typename MultiGeometry, typename RangeOrPoint>
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struct append_point<multi_polygon_tag, MultiGeometry, RangeOrPoint>
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: detail::append::append_to_multigeometry<MultiGeometry, RangeOrPoint>
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{};
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template <typename MultiGeometry, typename RangeOrPoint>
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struct append_range<multi_polygon_tag, MultiGeometry, RangeOrPoint>
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: detail::append::append_to_multigeometry<MultiGeometry, RangeOrPoint>
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{};
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} // namespace splitted_dispatch
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} // namespace dispatch
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#endif // DOXYGEN_NO_DISPATCH
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namespace resolve_variant {
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template <typename Geometry>
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struct append
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{
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template <typename RangeOrPoint>
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static inline void apply(Geometry& geometry,
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RangeOrPoint const& range_or_point,
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int ring_index,
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int multi_index)
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{
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concepts::check<Geometry>();
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dispatch::append<Geometry, RangeOrPoint>::apply(geometry,
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range_or_point,
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ring_index,
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multi_index);
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}
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};
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template <BOOST_VARIANT_ENUM_PARAMS(typename T)>
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struct append<boost::variant<BOOST_VARIANT_ENUM_PARAMS(T)> >
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{
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template <typename RangeOrPoint>
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struct visitor: boost::static_visitor<void>
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{
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RangeOrPoint const& m_range_or_point;
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int m_ring_index;
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int m_multi_index;
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visitor(RangeOrPoint const& range_or_point,
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int ring_index,
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int multi_index):
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m_range_or_point(range_or_point),
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m_ring_index(ring_index),
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m_multi_index(multi_index)
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{}
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template <typename Geometry>
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void operator()(Geometry& geometry) const
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{
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append<Geometry>::apply(geometry,
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m_range_or_point,
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m_ring_index,
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m_multi_index);
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}
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};
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template <typename RangeOrPoint>
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static inline void apply(boost::variant<BOOST_VARIANT_ENUM_PARAMS(T)>& variant_geometry,
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RangeOrPoint const& range_or_point,
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int ring_index,
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int multi_index)
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{
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boost::apply_visitor(
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visitor<RangeOrPoint>(
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range_or_point,
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ring_index,
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multi_index
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),
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variant_geometry
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);
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}
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};
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} // namespace resolve_variant;
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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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int ring_index = -1, int multi_index = 0)
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{
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resolve_variant::append<Geometry>
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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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