// 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) //[boost_range_strided //` Shows how to use a Boost.Geometry ring, strided by Boost.Range adaptor #include <iostream> #include <boost/assign.hpp> #include <boost/geometry.hpp> #include <boost/geometry/geometries/point_xy.hpp> #include <boost/geometry/geometries/ring.hpp> #include <boost/geometry/geometries/adapted/boost_range/strided.hpp> int main() { using namespace boost::assign; using boost::adaptors::strided; typedef boost::geometry::model::d2::point_xy<int> xy; boost::geometry::model::ring<xy> ring; ring += xy(0, 0); ring += xy(0, 1); ring += xy(0, 2); ring += xy(1, 2); ring += xy(2, 2); ring += xy(2, 0); boost::geometry::correct(ring); std::cout << "Normal : " << boost::geometry::dsv(ring) << std::endl << "Strided: " << boost::geometry::dsv(ring | strided(2)) << std::endl; return 0; } //] //[boost_range_strided_output /*` Output: [pre Normal : ((0, 0), (0, 1), (0, 2), (1, 2), (2, 2), (2, 0), (0, 0)) Strided: ((0, 0), (0, 2), (2, 2), (0, 0)) ] */ //]