// 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) //[simplify //` Example showing how to simplify a linestring #include <iostream> #include <boost/geometry.hpp> #include <boost/geometry/geometries/linestring.hpp> #include <boost/geometry/geometries/point_xy.hpp> /*< For this example we use Boost.Assign to add points >*/ #include <boost/assign.hpp> using namespace boost::assign; int main() { typedef boost::geometry::model::d2::point_xy<double> xy; boost::geometry::model::linestring<xy> line; line += xy(1.1, 1.1), xy(2.5, 2.1), xy(3.1, 3.1), xy(4.9, 1.1), xy(3.1, 1.9); /*< With Boost.Assign >*/ // Simplify it, using distance of 0.5 units boost::geometry::model::linestring<xy> simplified; boost::geometry::simplify(line, simplified, 0.5); std::cout << " original: " << boost::geometry::dsv(line) << std::endl << "simplified: " << boost::geometry::dsv(simplified) << std::endl; return 0; } //] //[simplify_output /*` Output: [pre original: ((1.1, 1.1), (2.5, 2.1), (3.1, 3.1), (4.9, 1.1), (3.1, 1.9)) simplified: ((1.1, 1.1), (3.1, 3.1), (4.9, 1.1), (3.1, 1.9)) ] */ //]