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64 lines
1.8 KiB
C++
64 lines
1.8 KiB
C++
// Boost.Geometry (aka GGL, Generic Geometry Library)
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// QuickBook Example
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// Copyright (c) 2011-2012 Barend Gehrels, Amsterdam, the Netherlands.
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// Use, modification and distribution is subject to the Boost Software License,
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// Version 1.0. (See accompanying file LICENSE_1_0.txt or copy at
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// http://www.boost.org/LICENSE_1_0.txt)
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//[make_2d_point
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//` Shows the usage of make as a generic constructor for different point types
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#include <iostream>
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#include <boost/geometry.hpp>
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#include <boost/geometry/geometries/point_xy.hpp>
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#include <boost/geometry/geometries/register/point.hpp>
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#include <boost/geometry/geometries/adapted/boost_tuple.hpp>
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#include <boost/geometry/geometries/adapted/boost_polygon/point.hpp>
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BOOST_GEOMETRY_REGISTER_BOOST_TUPLE_CS(cs::cartesian)
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struct mypoint { float _x, _y; };
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BOOST_GEOMETRY_REGISTER_POINT_2D(mypoint, float, cs::cartesian, _x, _y)
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template <typename Point>
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void construct_and_display()
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{
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using boost::geometry::make;
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using boost::geometry::get;
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Point p = make<Point>(1, 2);
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std::cout << "x=" << get<0>(p) << " y=" << get<1>(p)
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<< " (" << typeid(Point).name() << ")"
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<< std::endl;
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}
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int main()
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{
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construct_and_display<boost::geometry::model::d2::point_xy<double> >();
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construct_and_display<boost::geometry::model::d2::point_xy<int> >();
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construct_and_display<boost::tuple<double, double> >();
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construct_and_display<boost::polygon::point_data<int> >();
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construct_and_display<mypoint>();
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return 0;
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}
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//]
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//[make_2d_point_output
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/*`
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Output (compiled using gcc):
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[pre
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x=1 y=2 (N5boost8geometry5model2d28point_xyIdNS0_2cs9cartesianEEE)
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x=1 y=2 (N5boost8geometry5model2d28point_xyIiNS0_2cs9cartesianEEE)
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x=1 y=2 (N5boost6tuples5tupleIddNS0_9null_typeES2_S2_S2_S2_S2_S2_S2_EE)
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x=1 y=2 (N5boost7polygon10point_dataIiEE)
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x=1 y=2 (7mypoint)
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]
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*/
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//]
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