// 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) //[make_2d_point //` Shows the usage of make as a generic constructor for different point types #include <iostream> #include <boost/geometry.hpp> #include <boost/geometry/geometries/point_xy.hpp> #include <boost/geometry/geometries/register/point.hpp> #include <boost/geometry/geometries/adapted/boost_tuple.hpp> #include <boost/geometry/geometries/adapted/boost_polygon/point.hpp> BOOST_GEOMETRY_REGISTER_BOOST_TUPLE_CS(cs::cartesian) struct mypoint { float _x, _y; }; BOOST_GEOMETRY_REGISTER_POINT_2D(mypoint, float, cs::cartesian, _x, _y) template <typename Point> void construct_and_display() { using boost::geometry::make; using boost::geometry::get; Point p = make<Point>(1, 2); std::cout << "x=" << get<0>(p) << " y=" << get<1>(p) << " (" << typeid(Point).name() << ")" << std::endl; } int main() { construct_and_display<boost::geometry::model::d2::point_xy<double> >(); construct_and_display<boost::geometry::model::d2::point_xy<int> >(); construct_and_display<boost::tuple<double, double> >(); construct_and_display<boost::polygon::point_data<int> >(); construct_and_display<mypoint>(); return 0; } //] //[make_2d_point_output /*` Output (compiled using gcc): [pre x=1 y=2 (N5boost8geometry5model2d28point_xyIdNS0_2cs9cartesianEEE) x=1 y=2 (N5boost8geometry5model2d28point_xyIiNS0_2cs9cartesianEEE) x=1 y=2 (N5boost6tuples5tupleIddNS0_9null_typeES2_S2_S2_S2_S2_S2_S2_EE) x=1 y=2 (N5boost7polygon10point_dataIiEE) x=1 y=2 (7mypoint) ] */ //]