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I wasn't able to reproduce the problem. Could you please send to me a
small program that does it.
Thanks, Efi.

Quoting 
:

> Hi,
>
> I’m trying to use labeled x-monotone curves (defined in Minkowski   
> Sums package) to keep some information on my polygon's edges.
>
> I have no problem to manipulate Labeled_curve, but when I construct   
> a General_Polygon_2 with these Labeled Curves, my label info   
> dissapear...
>
> Is there anything I can do to keep info with each edge of a polygon ?
>
>
> Extract of my test file :
>
> // Create labeled curves with segments or circular arcs
> […]
>
> std::cout << labelCurveTst3.label().component() << std::endl;
> // Displays “2” --> OK
>
> // Create my polygon from labeled curves
> Labeled_curve_2 labelcurves2[] = { labelCurveTst1, labelCurveTst2,   
> labelCurveTst3, labelCurveTst4 };
> General_polygon_2  pgn(labelcurves2, labelcurves2+4);
>
> Curve_const_iterator k;
> Labeled_curve_2 labelCurve1;
>
> k = pgn.curves_begin();
> k++;
> k++;
> labelCurve1 = *k;
>
> std::cout << labelCurve1.label().component() << std::endl;
> // Displays “0” --> pb !?
>
> […]
>
> Best Regards,
>
> Gaetan
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