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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)
//[append
//` Shows usage of Boost.Geometry's append to append a point or a range to a polygon
#include <iostream>
#include <boost/assign.hpp>
#include <boost/geometry.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()
{
using boost::assign::tuple_list_of;
using boost::make_tuple;
using boost::geometry::append;
typedef boost::geometry::model::polygon<boost::tuple<int, int> > polygon;
polygon poly;
// Append a range
append(poly, tuple_list_of(0, 0)(0, 10)(11, 11)(10, 0)); /*< tuple_list_of delivers a range and can therefore be used in boost::geometry::append >*/
// Append a point (in this case the closing point)
append(poly, make_tuple(0, 0));
// Create an interior ring (append does not do this automatically)
boost::geometry::interior_rings(poly).resize(1);
// Append a range to the interior ring
append(poly, tuple_list_of(2, 2)(2, 5)(6, 6)(5, 2), 0); /*< The last parameter ring_index 0 denotes the first interior ring >*/
// Append a point to the first interior ring
append(poly, make_tuple(2, 2), 0);
std::cout << boost::geometry::dsv(poly) << std::endl;
return 0;
}
//]
//[append_output
/*`
Output:
[pre
(((0, 0), (0, 10), (11, 11), (10, 0), (0, 0)), ((2, 2), (2, 5), (6, 6), (5, 2), (2, 2)))
]
*/
//]
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