Re: [Boost-users] Boost.Geometry, probable bug in point_on_surface

Subject: Re: [Boost-users] Boost.Geometry, probable bug in point_on_surface
From: Petr Doubrava (petr_at_[hidden])
Date: 2014-10-10 04:32:24

Hi Adam,

thank for your answer. I have created a ticket:
 
https://svn.boost.org/trac/boost/ticket/10643

Regards,
Petr

----- Original Message -----
From: Adam Wulkiewicz
[mailto:adam.wulkiewicz_at_[hidden]]
To: boost-users_at_[hidden]
Sent:
Thu, 09 Oct 2014 16:44:04 +0100
Subject: Re: [Boost-users] Boost.Geometry,
probable bug in point_on_surface

> Hi Petr,
> 
> I'll top-post because there is only code below.
> 
> You're right, something's wrong with point_on_surface().
> Could you please create a ticket: 
> http://www.boost.org/development/bugs.html ?
> 
> FYI, your WKT POLYGON is CCW but you're creating a CW one using default 
> template parameters of model::polygon<>.
> 
> Regards,
> Adam
> 
> Petr Doubrava wrote:
> > #include <boost/geometry.hpp>
> > #include <boost/geometry/geometries/point_xy.hpp>
> > #include <boost/geometry/geometries/polygon.hpp>
> >
> >    void test_point_on_surface()
> >    {
> >        typedef boost::geometry::model::point<double, 2,
> boost::geometry::cs::cartesian> Point;
> >        boost::geometry::model::polygon<Point> poly;
> >
> >        boost::geometry::read_wkt("POLYGON((1074699.93 703064.65,
> 1074702.10 703054.62, 1074704.53 703061.40, 1074703.90 703064.58, 1074699.93
> 703064.65))",poly);
> >        boost::geometry::correct(poly);
> >
> >        Point point;
> >        boost::geometry::point_on_surface(poly,point);
> >
> >        //computed point isn't on the surface of polygon
> >        //[0]    1074839.1013086310 double
> >        //[1]    703154.77900308778 double
> >
> >        bool res = boost::geometry::within(point,poly);
> >        // res is false
> >    }
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> > Boost-users_at_[hidden]
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> >
> 
> 
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