Boost logo

Geometry :

Subject: Re: [geometry] snapshot of the future geometry 1.56 release
From: Barend Gehrels (barend_at_[hidden])
Date: 2014-02-27 15:35:09

Hi Yohann,

yohann.benedic_at_[hidden] wrote On 27-2-2014 16:44:
> Hi Barend,
> Sorry to bother you again. I am facing quite a large amount of crashes with either union_, or difference (and possibly others) when I try them on my large datasets (many hundred thousand polygons processed in various ways, I am actually porting existing working code from GPC to boost/Geometry). Most of what I see have to do with numerical robustness (e.g. computing the difference between two polygons that merely cover each other).
> The ported code is expected to become production code by the end of the semester and it's not going to happen with version 1.54.
> Since you told me a lot of work has been done about it in the future 1.56 release of boost::geometry, I was wondering if I could somehow try it (I believe I should download from to see how stable it has become regarding numerical robustness. The good thing would be that I could focus on reporting relevant crash cases and not the ones that are already fixed in your dev branch.
> What do you think? Is the link I found the right one for that matter?

It is not yet integrated into the "develop" branch. The branch is:

Apart from that the union and other intersection problems should be
solved. However, a nasty side effect in some cases is that some spikes
are left, I'm trying to fix that too and that is the reason why it is
not integrated yet. I cannot say if that is a problem for you.

You are welcome to try it and report your experiences with it.

It is a (more or less) personal branch but still I try to have it as
complete as possible, so no compilation errors etc, but it is not daily
tested automatically.

Regards, Barend

Geometry list run by mateusz at