Geometry Boost List: Re: [geometry] Asymetric buffer on a line string

From: Barend Gehrels (barend_at_[hidden])
Date: 2019-08-24 08:54:30

Hi Matthieu,

Op 20-8-2019 om 18:09 schreef Matthieu Beghin via Geometry:
> Hi,
> I'd like to get asymetric buffer (buffering only on one side) on a 
> line string working but it doesn't, with boost 1.68.
> The path is in green here, the buffer output in black (and below the 
> green path). Code below.
>
> Screenshot 2019-08-20 at 17.51.46.png
> Â  Â  Â  Â  lineString_t inputRing;
> Â  Â  Â  Â  bg::append(inputRing, points);
> Â  Â  Â  Â  bg::correct(inputRing);
>
> Â  Â  Â  Â  bg::strategy::buffer::join_miter join_strategy(2);
> Â  Â  Â  Â  bg::strategy::buffer::end_flat end_strategy;
> Â  Â  Â  Â  bg::strategy::buffer::point_circle circle_strategy(24);
> Â  Â  Â  Â  bg::strategy::buffer::side_straight side_strategy;
>
> Â  Â  Â  Â  multiPolygon_t inflated;
> bg::strategy::buffer::distance_asymmetric<double> 
> inflatingStrategy(feathering/2,0);
> Â  Â  Â  Â  bg::buffer(inputRing, inflated,
> Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  inflatingStrategy, side_strategy,
> Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  join_strategy, end_strategy, circle_strategy);
>
> Any chance it has been fixed in later releases ? (upgrading is a 
> process with Windows, macOS & raspberry pi builds)
> Thanks a lot!

Thanks for your message. I cannot predict if it is fixed. Can you create 
an issue, including the WKT (or another representation) of your input, here?

https://github.com/boostorg/geometry/issues

Even if we don't have the time to jump on it immediately, in the end we 
will.

Thanks, regards, Barend