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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)
//[for_each_point_const
//` Sample using for_each_point, using a function to list coordinates
#include <iostream>
#include <boost/geometry.hpp>
#include <boost/geometry/geometries/point_xy.hpp>
#include <boost/geometry/geometries/polygon.hpp>
#include <boost/geometry/io/wkt/wkt.hpp>
template <typename Point>
void list_coordinates(Point const& p)
{
using boost::geometry::get;
std::cout << "x = " << get<0>(p) << " y = " << get<1>(p) << std::endl;
}
int main()
{
typedef boost::geometry::model::d2::point_xy<double> point;
boost::geometry::model::polygon<point> poly;
boost::geometry::read_wkt("POLYGON((0 0,0 4,4 0,0 0))", poly);
boost::geometry::for_each_point(poly, list_coordinates<point>);
return 0;
}
//]
//[for_each_point_const_output
/*`
Output:
[pre
x = 0 y = 0
x = 0 y = 4
x = 4 y = 0
x = 0 y = 0
]
*/
//]
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