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38adce676e
- replace BOOST_FOREACH - replace Boost.Assign - replace typedef with using - other minor changes
57 lines
1.4 KiB
C++
57 lines
1.4 KiB
C++
// Boost.Geometry (aka GGL, Generic Geometry Library)
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// QuickBook Example
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// Copyright (c) 2011-2024 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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//[equals
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//` Shows the predicate equals, which returns true if two geometries are spatially equal
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#include <iostream>
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#include <boost/geometry.hpp>
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#include <boost/geometry/geometries/polygon.hpp>
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#include <boost/geometry/geometries/adapted/boost_tuple.hpp>
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BOOST_GEOMETRY_REGISTER_BOOST_TUPLE_CS(cs::cartesian)
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int main()
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{
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using point = boost::tuple<int, int>;
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boost::geometry::model::polygon<point> poly1, poly2;
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boost::geometry::exterior_ring(poly1) = {{0, 0}, {0, 5}, {5, 5}, {5, 0}, {0, 0}};
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boost::geometry::exterior_ring(poly2) = {{5, 0}, {0, 0}, {0, 5}, {5, 5}, {5, 0}};
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std::cout
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<< "polygons are spatially "
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<< (boost::geometry::equals(poly1, poly2) ? "equal" : "not equal")
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<< std::endl;
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boost::geometry::model::box<point> box;
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boost::geometry::assign_values(box, 0, 0, 5, 5);
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std::cout
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<< "polygon and box are spatially "
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<< (boost::geometry::equals(box, poly2) ? "equal" : "not equal")
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<< std::endl;
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return 0;
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}
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//]
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//[equals_output
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/*`
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Output:
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[pre
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polygons are spatially equal
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polygon and box are spatially equal
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]
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*/
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//]
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