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380 lines
11 KiB
C++
380 lines
11 KiB
C++
// Boost.Geometry (aka GGL, Generic Geometry Library)
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// Copyright (c) 2007-2012 Barend Gehrels, Amsterdam, the Netherlands.
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// Copyright (c) 2008-2012 Bruno Lalande, Paris, France.
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// Copyright (c) 2009-2012 Mateusz Loskot, London, UK.
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// Copyright (c) 2014 Samuel Debionne, Grenoble, France.
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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_ASSIGN_HPP
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#define BOOST_GEOMETRY_ALGORITHMS_ASSIGN_HPP
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#include <cstddef>
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#include <boost/concept/requires.hpp>
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#include <boost/concept_check.hpp>
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#include <boost/mpl/assert.hpp>
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#include <boost/mpl/if.hpp>
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#include <boost/numeric/conversion/bounds.hpp>
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#include <boost/numeric/conversion/cast.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/detail/assign_box_corners.hpp>
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#include <boost/geometry/algorithms/detail/assign_indexed_point.hpp>
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#include <boost/geometry/algorithms/detail/assign_values.hpp>
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#include <boost/geometry/algorithms/convert.hpp>
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#include <boost/geometry/algorithms/append.hpp>
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#include <boost/geometry/algorithms/clear.hpp>
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#include <boost/geometry/arithmetic/arithmetic.hpp>
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#include <boost/geometry/core/access.hpp>
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#include <boost/geometry/core/exterior_ring.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/util/for_each_coordinate.hpp>
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namespace boost { namespace geometry
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{
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/*!
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\brief Assign a range of points to a linestring, ring or polygon
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\note The point-type of the range might be different from the point-type of the geometry
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\ingroup assign
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\tparam Geometry \tparam_geometry
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\tparam Range \tparam_range_point
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\param geometry \param_geometry
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\param range \param_range_point
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\qbk{
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[heading Notes]
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[note Assign automatically clears the geometry before assigning (use append if you don't want that)]
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[heading Example]
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[assign_points] [assign_points_output]
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[heading See also]
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\* [link geometry.reference.algorithms.append append]
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}
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*/
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template <typename Geometry, typename Range>
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inline void assign_points(Geometry& geometry, Range const& range)
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{
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concepts::check<Geometry>();
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clear(geometry);
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geometry::append(geometry, range, -1, 0);
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}
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/*!
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\brief assign to a box inverse infinite
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\details The assign_inverse function initialize a 2D or 3D box with large coordinates, the
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min corner is very large, the max corner is very small. This is a convenient starting point to
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collect the minimum bounding box of a geometry.
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\ingroup assign
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\tparam Geometry \tparam_geometry
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\param geometry \param_geometry
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\qbk{
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[heading Example]
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[assign_inverse] [assign_inverse_output]
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[heading See also]
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\* [link geometry.reference.algorithms.make.make_inverse make_inverse]
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}
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*/
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template <typename Geometry>
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inline void assign_inverse(Geometry& geometry)
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{
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concepts::check<Geometry>();
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dispatch::assign_inverse
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<
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typename tag<Geometry>::type,
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Geometry
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>::apply(geometry);
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}
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/*!
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\brief assign zero values to a box, point
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\ingroup assign
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\details The assign_zero function initializes a 2D or 3D point or box with coordinates of zero
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\tparam Geometry \tparam_geometry
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\param geometry \param_geometry
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*/
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template <typename Geometry>
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inline void assign_zero(Geometry& geometry)
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{
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concepts::check<Geometry>();
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dispatch::assign_zero
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<
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typename tag<Geometry>::type,
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Geometry
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>::apply(geometry);
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}
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/*!
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\brief Assign two coordinates to a geometry (usually a 2D point)
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\ingroup assign
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\tparam Geometry \tparam_geometry
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\tparam Type \tparam_numeric to specify the coordinates
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\param geometry \param_geometry
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\param c1 \param_x
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\param c2 \param_y
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\qbk{distinguish, 2 coordinate values}
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\qbk{
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[heading Example]
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[assign_2d_point] [assign_2d_point_output]
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[heading See also]
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\* [link geometry.reference.algorithms.make.make_2_2_coordinate_values make]
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}
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*/
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template <typename Geometry, typename Type>
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inline void assign_values(Geometry& geometry, Type const& c1, Type const& c2)
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{
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concepts::check<Geometry>();
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dispatch::assign
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<
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typename tag<Geometry>::type,
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Geometry,
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geometry::dimension<Geometry>::type::value
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>::apply(geometry, c1, c2);
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}
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/*!
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\brief Assign three values to a geometry (usually a 3D point)
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\ingroup assign
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\tparam Geometry \tparam_geometry
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\tparam Type \tparam_numeric to specify the coordinates
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\param geometry \param_geometry
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\param c1 \param_x
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\param c2 \param_y
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\param c3 \param_z
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\qbk{distinguish, 3 coordinate values}
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\qbk{
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[heading Example]
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[assign_3d_point] [assign_3d_point_output]
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[heading See also]
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\* [link geometry.reference.algorithms.make.make_3_3_coordinate_values make]
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}
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*/
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template <typename Geometry, typename Type>
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inline void assign_values(Geometry& geometry,
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Type const& c1, Type const& c2, Type const& c3)
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{
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concepts::check<Geometry>();
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dispatch::assign
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<
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typename tag<Geometry>::type,
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Geometry,
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geometry::dimension<Geometry>::type::value
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>::apply(geometry, c1, c2, c3);
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}
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/*!
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\brief Assign four values to a geometry (usually a box or segment)
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\ingroup assign
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\tparam Geometry \tparam_geometry
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\tparam Type \tparam_numeric to specify the coordinates
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\param geometry \param_geometry
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\param c1 First coordinate (usually x1)
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\param c2 Second coordinate (usually y1)
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\param c3 Third coordinate (usually x2)
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\param c4 Fourth coordinate (usually y2)
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\qbk{distinguish, 4 coordinate values}
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*/
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template <typename Geometry, typename Type>
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inline void assign_values(Geometry& geometry,
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Type const& c1, Type const& c2, Type const& c3, Type const& c4)
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{
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concepts::check<Geometry>();
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dispatch::assign
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<
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typename tag<Geometry>::type,
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Geometry,
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geometry::dimension<Geometry>::type::value
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>::apply(geometry, c1, c2, c3, c4);
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}
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namespace resolve_variant
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{
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template <typename Geometry1, typename Geometry2>
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struct assign
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{
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static inline void
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apply(Geometry1& geometry1, const Geometry2& geometry2)
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{
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concepts::check<Geometry1>();
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concepts::check<Geometry2 const>();
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concepts::check_concepts_and_equal_dimensions<Geometry1, Geometry2 const>();
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static bool const same_point_order
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= point_order<Geometry1>::value == point_order<Geometry2>::value;
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BOOST_MPL_ASSERT_MSG
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(
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(same_point_order),
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ASSIGN_IS_NOT_SUPPORTED_FOR_DIFFERENT_POINT_ORDER,
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(types<Geometry1, Geometry2>)
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);
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static bool const same_closure
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= closure<Geometry1>::value == closure<Geometry2>::value;
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BOOST_MPL_ASSERT_MSG
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(
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(same_closure),
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ASSIGN_IS_NOT_SUPPORTED_FOR_DIFFERENT_CLOSURE,
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(types<Geometry1, Geometry2>)
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);
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dispatch::convert<Geometry2, Geometry1>::apply(geometry2, geometry1);
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}
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};
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template <BOOST_VARIANT_ENUM_PARAMS(typename T), typename Geometry2>
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struct assign<variant<BOOST_VARIANT_ENUM_PARAMS(T)>, Geometry2>
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{
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struct visitor: static_visitor<void>
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{
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Geometry2 const& m_geometry2;
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visitor(Geometry2 const& geometry2)
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: m_geometry2(geometry2)
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{}
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template <typename Geometry1>
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result_type operator()(Geometry1& geometry1) const
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{
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return assign
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<
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Geometry1,
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Geometry2
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>::apply
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(geometry1, m_geometry2);
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}
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};
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static inline void
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apply(variant<BOOST_VARIANT_ENUM_PARAMS(T)>& geometry1,
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Geometry2 const& geometry2)
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{
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return boost::apply_visitor(visitor(geometry2), geometry1);
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}
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};
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template <typename Geometry1, BOOST_VARIANT_ENUM_PARAMS(typename T)>
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struct assign<Geometry1, variant<BOOST_VARIANT_ENUM_PARAMS(T)> >
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{
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struct visitor: static_visitor<void>
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{
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Geometry1& m_geometry1;
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visitor(Geometry1 const& geometry1)
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: m_geometry1(geometry1)
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{}
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template <typename Geometry2>
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result_type operator()(Geometry2 const& geometry2) const
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{
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return assign
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<
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Geometry1,
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Geometry2
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>::apply
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(m_geometry1, geometry2);
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}
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};
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static inline void
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apply(Geometry1& geometry1,
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variant<BOOST_VARIANT_ENUM_PARAMS(T)> const& geometry2)
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{
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return boost::apply_visitor(visitor(geometry1), geometry2);
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}
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};
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template <BOOST_VARIANT_ENUM_PARAMS(typename T1), BOOST_VARIANT_ENUM_PARAMS(typename T2)>
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struct assign<variant<BOOST_VARIANT_ENUM_PARAMS(T1)>, variant<BOOST_VARIANT_ENUM_PARAMS(T2)> >
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{
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struct visitor: static_visitor<void>
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{
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template <typename Geometry1, typename Geometry2>
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result_type operator()(
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Geometry1& geometry1,
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Geometry2 const& geometry2) const
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{
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return assign
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<
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Geometry1,
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Geometry2
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>::apply
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(geometry1, geometry2);
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}
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};
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static inline void
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apply(variant<BOOST_VARIANT_ENUM_PARAMS(T1)>& geometry1,
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variant<BOOST_VARIANT_ENUM_PARAMS(T2)> const& geometry2)
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{
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return boost::apply_visitor(visitor(), geometry1, geometry2);
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}
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};
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} // namespace resolve_variant
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/*!
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\brief Assigns one geometry to another geometry
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\details The assign algorithm assigns one geometry, e.g. a BOX, to another
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geometry, e.g. a RING. This only works if it is possible and applicable.
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\ingroup assign
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\tparam Geometry1 \tparam_geometry
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\tparam Geometry2 \tparam_geometry
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\param geometry1 \param_geometry (target)
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\param geometry2 \param_geometry (source)
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\qbk{
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[heading Example]
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[assign] [assign_output]
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[heading See also]
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\* [link geometry.reference.algorithms.convert convert]
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}
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*/
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template <typename Geometry1, typename Geometry2>
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inline void assign(Geometry1& geometry1, Geometry2 const& geometry2)
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{
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resolve_variant::assign<Geometry1, Geometry2>::apply(geometry1, geometry2);
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}
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}} // namespace boost::geometry
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#endif // BOOST_GEOMETRY_ALGORITHMS_ASSIGN_HPP
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