Re: [Boost-users] [boost-users] [geometry] segment concept

Subject: Re: [Boost-users] [boost-users] [geometry] segment concept
From: Sergei Politov (spolitov_at_[hidden])
Date: 2011-07-25 09:14:34

Hi Barend,

>
>
> That is correct. If you mean "cutting a ring with a segment": it can be
> used/implemented, discussed and described on the GGL-mailing list. That
> might be useful for you as well. It is described here:
> <
> http://boost-geometry.203548.n3.nabble.com/Understanding-get-turns-for-linestring-polygon-overlay-td2397891.html
> >
>
>
> I meant intersection of ring border and segment. For example.
ring: (0, 0), (2, 0), (2, 2), (0, 2)
segment: (-1, 1), (3, 1)
output two points: (0,1) and (2,1)

>
>
>
>  There is distance algorithm between point and segment (or ring), is it
> possible to get closest point of segment to that point?
>
>
>
> No, or not yet. I once needed that and created a strategy for that, but it
> is not in the Trunk or Release (not even in the extensions). I will see if
> it can be added, because there has been a question about this earlier.
>
> It would be nice to see such usage of strategy in the documentation.

Best Regards,
  Sergey