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38adce676e
- replace BOOST_FOREACH - replace Boost.Assign - replace typedef with using - other minor changes
71 lines
1.9 KiB
C++
71 lines
1.9 KiB
C++
// Boost.Geometry (aka GGL, Generic Geometry Library)
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// QuickBook Example
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// Copyright (c) 2020 Digvijay Janartha, Hamirpur, India.
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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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//[covered_by
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//` Checks if the first geometry is inside or on border the second geometry
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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/polygon.hpp>
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namespace bg = boost::geometry; /*< Convenient namespace alias >*/
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int main()
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{
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// Checks if the first geometry is inside or on border the second geometry.
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bg::model::polygon<bg::model::d2::point_xy<double>> poly1;
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bg::read_wkt("POLYGON((0 2,0 3,2 4,1 2,0 2))", poly1);
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bg::model::polygon<bg::model::d2::point_xy<double>> poly2;
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bg::read_wkt("POLYGON((0 4,3 4,2 2,0 1,0 4))", poly2);
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bool check_covered = bg::covered_by(poly1, poly2);
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if (check_covered) {
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std::cout << "Covered: Yes" << std::endl;
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} else {
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std::cout << "Covered: No" << std::endl;
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}
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bg::model::polygon<bg::model::d2::point_xy<double>> poly3;
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bg::read_wkt("POLYGON((-1 -1,-3 -4,-7 -7,-4 -3,-1 -1))", poly3);
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check_covered = bg::covered_by(poly1, poly3);
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if (check_covered) {
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std::cout << "Covered: Yes" << std::endl;
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} else {
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std::cout << "Covered: No" << std::endl;
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}
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// This should return true since both polygons are same, so they are lying on each other.
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check_covered = bg::covered_by(poly1, poly1);
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if (check_covered) {
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std::cout << "Covered: Yes" << std::endl;
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} else {
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std::cout << "Covered: No" << std::endl;
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}
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return 0;
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}
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//]
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//[covered_by_output
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/*`
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Output:
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[pre
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Covered: Yes
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[$img/algorithms/covered_by.png]
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Covered: No
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Covered: Yes
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]
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*/
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//]
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