Geometry Boost List: Re: [geometry] polygon linestring intersection issue

Subject: Re: [geometry] polygon linestring intersection issue
From: sergei benkovich (sergei1503_at_[hidden])
Date: 2016-06-23 10:20:21

Hey Sorry for this there is no intersection here.was looking on in
incorrect graph....

On Thu, Jun 23, 2016 at 4:53 PM, sergei benkovich <sergei1503_at_[hidden]>
wrote:

> Hey,
> i'm trying to use bg::intersection to find the intersection between a line
> segment and a polygon.
> in some cases it works, but in others it doesn't.
>
> there should be an intersection between these two geometries but i get
> nothing in the result.
> anyone knows of any issues regarding this type of intersections?
>
> this is the test code i ran:
>
>     bgPolygonType testPol;
>     boost::geometry::read_wkt("POLYGON((1012 1621, 1013 1621, 1013 1622,
> 1012 1622, 1012 1621))", testPol);
>     typedef bg::model::d2::point_xy<double,
> boost::geometry::cs::cartesian> point_t;
>     typedef bg::model::linestring<point_t> linestring_t;
>
>     linestring_t ls;
>     bg::append(ls, point_t(1011.4, 1621.64));
>     bg::append(ls, point_t(1013.6, 1623.68));
>
>     std::vector<point_t> res;
>     bg::intersection(testPol, ls, res);
>
> thanks
> Sergei
>