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

Subject: Re: [Boost-users] [boost-users] [geometry] segment concept
From: Barend Gehrels (barend_at_[hidden])
Date: 2011-07-24 06:47:12

Hi Sergey,

On 22-7-2011 16:07, Sergei Politov wrote:
> Hi Barend,
>
>     It is. It did not use the concept at that point. After inspecting
>     I remembered why, and it is fixed now (in Boost.Trunk).
>
> Thanks for a quick fix.

You are welcome.

>
> Some more questions.
>
> Am I correctly understand that intersection of segment and ring is not 
> implemented yet?

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>

>
> 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.

Regards, Barend