CGAL users discussion list

["Sebastien Loriot (GeometryFactory)" <>]

The type is boost::optional< boost::variant<T..> > where the types in 
the variant depends on what you call intersection with.
In you case, it can only be 
std::pair<Circular_arc_point_2<CircularKernel>, unsigned>

http://doc.cgal.org/latest/Kernel_23/group__intersection__circular__grp.html


Have a look at the example on this page how to get the type out of the 
boost one:
http://doc.cgal.org/latest/Kernel_23/group__intersection__linear__grp.html

Sebastien.

On 07/07/2015 08:56 AM, Dylan Lawrence wrote:
> After quite a bit of rewrites I was able to actually get the
> intersections running using CGAL::intersection() I know my vector
> contains the intersections however what exactly is in that vector. It
> seems to be an extension of a boost type but it's unclear what it is.
> Essentially I have my intersections, but I do not understand how to
> access them to get the point of incidence for an intersection.
>
> On Tue, Jun 23, 2015 at 12:55 PM, Laurent Rineau (CGAL/GeometryFactory)
> <
>  
> <mailto:>>
>  wrote:
>
>     Le Tuesday 23 June 2015 16:22:27 Monique Teillaud a écrit :
>     > a Line_arc_2 can be constructed from a Segment_2
>     
> >http://doc.cgal.org/latest/Circular_kernel_2/classCGAL_1_1Line__arc__2.html
>     >
>     > then you can intersect it with a circle or a circular arc
>     
> >http://doc.cgal.org/latest/Circular_kernel_2/classCircularKernel_1_1DoInters
>     > ect__2.html
>     > Le 23/06/15 04:22, dlawre14 a écrit :
>     > > I've done some searching of the docs but cannot find any entry of a
>     > > Circle_2 and Segment_2 intersecting. Can such a thing be done or do I
>     > > need to convert the Segment_2 to another type?
>
>     See also :
>
>        - the Intersect_2 functor:
>
>     
> http://doc.cgal.org/latest/Circular_kernel_2/classCircularKernel_1_1Intersect__2.html
>
>        - the corresponding 'do_intersect' and 'intersection' global
>     functions
>     overloads:
>
>     
> http://doc.cgal.org/latest/Kernel_23/group__do__intersect__circular__grp.html
>     
> http://doc.cgal.org/latest/Kernel_23/group__intersection__circular__grp.html
>
>     --
>     Laurent Rineau, PhD
>     R&D Engineer at GeometryFactory http://www.geometryfactory.com/
>     Release Manager of the CGAL Project http://www.cgal.org/
>
>
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>
> --
> Dylan Lawrence
> Masters Student
> Bioinformatics and Computational Biology