// Boost.Geometry (aka GGL, Generic Geometry Library) // QuickBook Example // Copyright (c) 2011-2015 Barend Gehrels, Amsterdam, the Netherlands. // This file was modified by Oracle on 2015. // Modifications copyright (c) 2015 Oracle and/or its affiliates. // Contributed and/or modified by Adam Wulkiewicz, on behalf of Oracle // 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) //[relate //` Shows how to detect if a point is inside a polygon, or not #include <iostream> #include <boost/geometry.hpp> #include <boost/geometry/geometries/point_xy.hpp> #include <boost/geometry/geometries/polygon.hpp> /*<-*/ #include "create_svg_two.hpp" /*->*/ int main() { typedef boost::geometry::model::d2::point_xy<double> point_type; typedef boost::geometry::model::polygon<point_type> polygon_type; polygon_type poly; boost::geometry::read_wkt( "POLYGON((2 1.3,2.4 1.7,2.8 1.8,3.4 1.2,3.7 1.6,3.4 2,4.1 3,5.3 2.6,5.4 1.2,4.9 0.8,2.9 0.7,2 1.3)" "(4.0 2.0, 4.2 1.4, 4.8 1.9, 4.4 2.2, 4.0 2.0))", poly); point_type p(4, 1); boost::geometry::de9im::mask mask("T*F**F***"); // within bool check = boost::geometry::relate(p, poly, mask); std::cout << "relate: " << (check ? "yes" : "no") << std::endl; /*<-*/ create_svg("relate.svg", poly, p); /*->*/ return 0; } //] //[relate_output /*` Output: [pre relate: yes [$img/algorithms/within.png] ] */ //]