/Src/Dependencies/Boost/libs/geometry/doc/src/examples/algorithms/equals.cpp
http://hadesmem.googlecode.com/ · C++ · 61 lines · 25 code · 18 blank · 18 comment · 0 complexity · a0a57beae94c7798262927ad4a0ccaf2 MD5 · raw file
- // Boost.Geometry (aka GGL, Generic Geometry Library)
- // QuickBook Example
- // Copyright (c) 2011 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)
- //[equals
- //` Shows the predicate equals, which returns true if two geometries are spatially equal
- #include <iostream>
- #include <boost/geometry.hpp>
- #include <boost/geometry/geometries/polygon.hpp>
- #include <boost/geometry/geometries/adapted/boost_tuple.hpp>
- BOOST_GEOMETRY_REGISTER_BOOST_TUPLE_CS(cs::cartesian)
- #include <boost/assign.hpp>
- int main()
- {
- using boost::assign::tuple_list_of;
- typedef boost::tuple<int, int> point;
- boost::geometry::model::polygon<point> poly1, poly2;
- boost::geometry::exterior_ring(poly1) = tuple_list_of(0, 0)(0, 5)(5, 5)(5, 0)(0, 0);
- boost::geometry::exterior_ring(poly2) = tuple_list_of(5, 0)(0, 0)(0, 5)(5, 5)(5, 0);
- std::cout
- << "polygons are spatially "
- << (boost::geometry::equals(poly1, poly2) ? "equal" : "not equal")
- << std::endl;
-
- boost::geometry::model::box<point> box;
- boost::geometry::assign_values(box, 0, 0, 5, 5);
-
- std::cout
- << "polygon and box are spatially "
- << (boost::geometry::equals(box, poly2) ? "equal" : "not equal")
- << std::endl;
-
- return 0;
- }
- //]
- //[equals_output
- /*`
- Output:
- [pre
- polygons are spatially equal
- polygon and box are spatially equal
- ]
- */
- //]