Re: [Boost-users] [geometry] problems with the ring concept

Subject: Re: [Boost-users] [geometry] problems with the ring concept
From: Barend Gehrels (barend_at_[hidden])
Date: 2013-08-25 04:13:02

Hi,

On 24-8-2013 18:07, Lepere Renaud wrote:
>
 > I have an existing geometric structure, and i try to make it usable
 > with boost geometry.  I read the documentation for a similar problem
 > but i did not success
 > 
http://www.boost.org/doc/libs/1_54_0/libs/geometry/doc/html/geometry/examples/example__adapting_a_legacy_geometry_object_model.html
 >
 >
 >
My Ring structure is very simple :
> typedef std::vector< Point  > Points; struct Ring { Points points; };
 >
 > void f() { boost::geometry::concept::check< Geom::Ring >(); } show
 > failure since apparently my range does not support a clear() method
 > correctly.
 >
The concepts you defined are for readonly rings. If you check 
<Geom::Ring *const*>, it should succeed.

Mutable rings should have clear, resize, push_back too. It is indeed 
missing in the docs, especially here,
http://www.boost.org/doc/libs/1_54_0/libs/geometry/doc/html/geometry/reference/concepts/concept_ring.html

will be added.

Regards, Barend