CGAL users discussion list

[Benoît Presles <>]

In my point of view (at least in general mode), if I have 2 points 
A(x1,y1) and B(x2,y2), the number of different alpha values should be 1 
and alpha=1/4*((x1-x2)^2+(y1-y2)^2).

Best Regards,
Ben_P


Le 07/09/2010 15:25, Andreas Fabri a écrit :
> I am not sure we support 2D alpha shapes for 1d point sets.
>
> andreas
>
>
> On 07/09/2010 15:23, Benoît Presles wrote:
> > Hello everybody,
> >
> > I did a program in order to know the number of different alpha-values
> > (see "main.cpp" file). When I test it with collinear points (see "fin"
> > file) I always get 0 different alpha-values.
> > In my point of view, if I have at least 2 points, I should always get a
> > number greater than 0.
> >
> > Thank you very much for your help,
> > Best Regards,
> > Ben_P