282 lines
8.3 KiB
C++
282 lines
8.3 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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// 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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// 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_UNION_HPP
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#define BOOST_GEOMETRY_ALGORITHMS_UNION_HPP
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#include <boost/range/metafunctions.hpp>
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#include <boost/geometry/core/is_areal.hpp>
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#include <boost/geometry/core/point_order.hpp>
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#include <boost/geometry/core/reverse_dispatch.hpp>
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#include <boost/geometry/geometries/concepts/check.hpp>
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#include <boost/geometry/algorithms/not_implemented.hpp>
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#include <boost/geometry/algorithms/detail/overlay/overlay.hpp>
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#include <boost/geometry/policies/robustness/get_rescale_policy.hpp>
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#include <boost/geometry/algorithms/detail/overlay/linear_linear.hpp>
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#include <boost/geometry/algorithms/detail/overlay/pointlike_pointlike.hpp>
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namespace boost { namespace geometry
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{
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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 Geometry1, typename Geometry2, typename GeometryOut,
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typename TagIn1 = typename tag<Geometry1>::type,
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typename TagIn2 = typename tag<Geometry2>::type,
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typename TagOut = typename tag<GeometryOut>::type,
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bool Areal1 = geometry::is_areal<Geometry1>::value,
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bool Areal2 = geometry::is_areal<Geometry2>::value,
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bool ArealOut = geometry::is_areal<GeometryOut>::value,
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bool Reverse1 = detail::overlay::do_reverse<geometry::point_order<Geometry1>::value>::value,
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bool Reverse2 = detail::overlay::do_reverse<geometry::point_order<Geometry2>::value>::value,
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bool ReverseOut = detail::overlay::do_reverse<geometry::point_order<GeometryOut>::value>::value,
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bool Reverse = geometry::reverse_dispatch<Geometry1, Geometry2>::type::value
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>
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struct union_insert: not_implemented<TagIn1, TagIn2, TagOut>
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{};
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// If reversal is needed, perform it first
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template
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<
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typename Geometry1, typename Geometry2, typename GeometryOut,
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typename TagIn1, typename TagIn2, typename TagOut,
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bool Areal1, bool Areal2, bool ArealOut,
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bool Reverse1, bool Reverse2, bool ReverseOut
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>
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struct union_insert
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<
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Geometry1, Geometry2, GeometryOut,
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TagIn1, TagIn2, TagOut,
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Areal1, Areal2, ArealOut,
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Reverse1, Reverse2, ReverseOut,
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true
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>: union_insert<Geometry2, Geometry1, GeometryOut>
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{
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template <typename RobustPolicy, typename OutputIterator, typename Strategy>
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static inline OutputIterator apply(Geometry1 const& g1,
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Geometry2 const& g2,
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RobustPolicy const& robust_policy,
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OutputIterator out,
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Strategy const& strategy)
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{
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return union_insert
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<
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Geometry2, Geometry1, GeometryOut
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>::apply(g2, g1, robust_policy, out, strategy);
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}
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};
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template
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<
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typename Geometry1, typename Geometry2, typename GeometryOut,
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typename TagIn1, typename TagIn2, typename TagOut,
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bool Reverse1, bool Reverse2, bool ReverseOut
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>
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struct union_insert
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<
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Geometry1, Geometry2, GeometryOut,
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TagIn1, TagIn2, TagOut,
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true, true, true,
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Reverse1, Reverse2, ReverseOut,
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false
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> : detail::overlay::overlay
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<Geometry1, Geometry2, Reverse1, Reverse2, ReverseOut, GeometryOut, overlay_union>
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{};
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// dispatch for union of non-areal geometries
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template
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<
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typename Geometry1, typename Geometry2, typename GeometryOut,
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typename TagIn1, typename TagIn2, typename TagOut,
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bool Reverse1, bool Reverse2, bool ReverseOut
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>
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struct union_insert
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<
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Geometry1, Geometry2, GeometryOut,
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TagIn1, TagIn2, TagOut,
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false, false, false,
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Reverse1, Reverse2, ReverseOut,
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false
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> : union_insert
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<
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Geometry1, Geometry2, GeometryOut,
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typename tag_cast<TagIn1, pointlike_tag, linear_tag>::type,
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typename tag_cast<TagIn2, pointlike_tag, linear_tag>::type,
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TagOut,
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false, false, false,
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Reverse1, Reverse2, ReverseOut,
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false
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>
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{};
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// dispatch for union of linear geometries
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template
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<
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typename Linear1, typename Linear2, typename LineStringOut,
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bool Reverse1, bool Reverse2, bool ReverseOut
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>
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struct union_insert
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<
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Linear1, Linear2, LineStringOut,
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linear_tag, linear_tag, linestring_tag,
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false, false, false,
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Reverse1, Reverse2, ReverseOut,
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false
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> : detail::overlay::linear_linear_linestring
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<
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Linear1, Linear2, LineStringOut, overlay_union
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>
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{};
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// dispatch for point-like geometries
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template
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<
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typename PointLike1, typename PointLike2, typename PointOut,
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bool Reverse1, bool Reverse2, bool ReverseOut
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>
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struct union_insert
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<
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PointLike1, PointLike2, PointOut,
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pointlike_tag, pointlike_tag, point_tag,
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false, false, false,
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Reverse1, Reverse2, ReverseOut,
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false
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> : detail::overlay::union_pointlike_pointlike_point
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<
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PointLike1, PointLike2, PointOut
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>
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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 union_
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{
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/*!
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\brief_calc2{union}
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\ingroup union
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\details \details_calc2{union_insert, spatial set theoretic union}.
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\details_insert{union}
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\tparam GeometryOut output geometry type, must be specified
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\tparam Geometry1 \tparam_geometry
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\tparam Geometry2 \tparam_geometry
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\tparam OutputIterator output iterator
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\param geometry1 \param_geometry
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\param geometry2 \param_geometry
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\param out \param_out{union}
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\return \return_out
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*/
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template
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<
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typename GeometryOut,
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typename Geometry1,
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typename Geometry2,
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typename OutputIterator
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>
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inline OutputIterator union_insert(Geometry1 const& geometry1,
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Geometry2 const& geometry2,
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OutputIterator out)
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{
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concepts::check<Geometry1 const>();
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concepts::check<Geometry2 const>();
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concepts::check<GeometryOut>();
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typedef typename geometry::rescale_overlay_policy_type
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<
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Geometry1,
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Geometry2
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>::type rescale_policy_type;
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typedef intersection_strategies
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<
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typename cs_tag<GeometryOut>::type,
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Geometry1,
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Geometry2,
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typename geometry::point_type<GeometryOut>::type,
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rescale_policy_type
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> strategy;
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rescale_policy_type robust_policy
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= geometry::get_rescale_policy<rescale_policy_type>(geometry1, geometry2);
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return dispatch::union_insert
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<
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Geometry1, Geometry2, GeometryOut
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>::apply(geometry1, geometry2, robust_policy, out, strategy());
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}
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}} // namespace detail::union_
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#endif // DOXYGEN_NO_DETAIL
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/*!
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\brief Combines two geometries which each other
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\ingroup union
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\details \details_calc2{union, spatial set theoretic union}.
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\tparam Geometry1 \tparam_geometry
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\tparam Geometry2 \tparam_geometry
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\tparam Collection output collection, either a multi-geometry,
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or a std::vector<Geometry> / std::deque<Geometry> etc
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\param geometry1 \param_geometry
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\param geometry2 \param_geometry
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\param output_collection the output collection
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\note Called union_ because union is a reserved word.
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\qbk{[include reference/algorithms/union.qbk]}
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*/
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template
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<
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typename Geometry1,
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typename Geometry2,
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typename Collection
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>
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inline void union_(Geometry1 const& geometry1,
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Geometry2 const& geometry2,
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Collection& output_collection)
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{
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concepts::check<Geometry1 const>();
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concepts::check<Geometry2 const>();
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typedef typename boost::range_value<Collection>::type geometry_out;
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concepts::check<geometry_out>();
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detail::union_::union_insert<geometry_out>(geometry1, geometry2,
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range::back_inserter(output_collection));
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}
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}} // namespace boost::geometry
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#endif // BOOST_GEOMETRY_ALGORITHMS_UNION_HPP
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