CGAL users discussion list

[David Keller <>]

Hi Efraim, Hi Ron,

Thanks for the fast reply and the patch. On my box it seemingly 
eliminated the bugs, well done.

Kind regards
David Keller

Efraim Fogel wrote:
> Hi David,
>
> Ron Wein, has provided a fix. Attached is a patch you can use to apply 
> the fix. Apply it from the include/CGAL directory ('patch < 
> Bezier.diff').
>
> It suppose to affect the following files:
>
>    Arr_traits_2/Bezier_cache.h
>    Arr_traits_2/Bezier_curve_2.h
>    Arr_traits_2/Bezier_x_monotone_2.h
>    Arr_traits_2/Bezier_point_2.h
>    Arr_traits_2/Bezier_bounding_rational_traits.h
>    Arr_Bezier_curve_traits_2.h
>
> The problem in test case #1 can simply be avoided if you comment out 
> the assertion on line 247 in Bezier_bounding_rational_traits.h
>
> The problem in test case #2 happens when there exists a vertical 
> tangency point that occurs exactly at the middle of the curve. As you 
> can see from the size of the patch, it was a bit more difficult to 
> fix. We hope that we eliminated the bugs or at least reduced their 
> number...
>
> Naturally, the fix will make it into the next release.