[Boost-bugs] [Boost C++ Libraries] #11899: boost::geometry::equals doesn't handle open polygons

Subject: [Boost-bugs] [Boost C++ Libraries] #11899: boost::geometry::equals doesn't handle open polygons
From: Boost C++ Libraries (noreply_at_[hidden])
Date: 2016-01-09 23:58:21

#11899: boost::geometry::equals doesn't handle open polygons
---------------------------------------------+----------------------
 Reporter:  Bruno Deligny <bruno.deligny@…>  |      Owner:  ljsimons
     Type:  Bugs                             |     Status:  new
Milestone:  To Be Determined                 |  Component:  polygon
  Version:  Boost 1.60.0                     |   Severity:  Problem
 Keywords:  polygon ring equals              |
---------------------------------------------+----------------------
 That doesn't works:

 {{{
 typedef boost::geometry::model::d2::point_xy<int> P;
 boost::geometry::model::polygon<P, false, false> polygon1, polygon2;

 boost::geometry::append(polygon1, boost::make_tuple(-18,1));
 boost::geometry::append(polygon1, boost::make_tuple(-23,1));
 boost::geometry::append(polygon1, boost::make_tuple(-23,-3));
 boost::geometry::append(polygon1, boost::make_tuple(-18,-3));

 boost::geometry::append(polygon2, boost::make_tuple(-23,1));
 boost::geometry::append(polygon2, boost::make_tuple(-23,-3));
 boost::geometry::append(polygon2, boost::make_tuple(-18,-3));
 boost::geometry::append(polygon2, boost::make_tuple(-18,1));

 assert(boost::geometry::equals(polygon1, polygon2) == true);
 }}}

 But this works:
 {{{
 typedef boost::geometry::model::d2::point_xy<int> P;
 boost::geometry::model::polygon<P, false, true> polygon1, polygon2;

 boost::geometry::append(polygon1, boost::make_tuple(-18,1));
 boost::geometry::append(polygon1, boost::make_tuple(-23,1));
 boost::geometry::append(polygon1, boost::make_tuple(-23,-3));
 boost::geometry::append(polygon1, boost::make_tuple(-18,-3));
 boost::geometry::append(polygon1, boost::make_tuple(-18,1));

 boost::geometry::append(polygon2, boost::make_tuple(-23,1));
 boost::geometry::append(polygon2, boost::make_tuple(-23,-3));
 boost::geometry::append(polygon2, boost::make_tuple(-18,-3));
 boost::geometry::append(polygon2, boost::make_tuple(-18,1));
 boost::geometry::append(polygon2, boost::make_tuple(-23,1));

 assert(boost::geometry::equals(polygon1, polygon2) == true);
 }}}

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Ticket URL: <https://svn.boost.org/trac/boost/ticket/11899>
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