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// Boost.Geometry (aka GGL, Generic Geometry Library)
// QuickBook Example
// Copyright (c) 2011-2012 Barend Gehrels, Amsterdam, the Netherlands.
// 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)
//[assign
//` Shows how to assign a geometry from another geometry
#include <iostream>
#include <boost/geometry.hpp>
#include <boost/geometry/geometries/box.hpp>
#include <boost/geometry/geometries/point_xy.hpp>
#include <boost/geometry/geometries/polygon.hpp>
#include <boost/geometry/geometries/adapted/boost_tuple.hpp>
BOOST_GEOMETRY_REGISTER_BOOST_TUPLE_CS(cs::cartesian)
int main()
{
typedef boost::geometry::model::d2::point_xy<double> point;
typedef boost::geometry::model::box<point> box;
typedef boost::geometry::model::polygon<point> polygon;
point p1;
box b;
boost::geometry::assign_values(p1, 1, 1);
boost::geometry::assign_values(b, 1, 1, 2, 2);
// Assign a box to a polygon (target = source)
polygon p;
boost::geometry::assign(p, b);
// Assign a point to another point type (conversion of point-type)
boost::tuple<double, double> p2;
boost::geometry::assign(p2, p1);
using boost::geometry::dsv;
std::cout
<< "box: " << dsv(b) << std::endl
<< "polygon: " << dsv(p) << std::endl
<< "point: " << dsv(p1) << std::endl
<< "point tuples: " << dsv(p2) << std::endl
;
return 0;
}
//]
//[assign_output
/*`
Output:
[pre
box: ((1, 1), (2, 2))
polygon: (((1, 1), (1, 2), (2, 2), (2, 1), (1, 1)))
point: (1, 1)
point tuples: (1, 1)
]
*/
//]
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