// 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))) ] */ //]