CGAL users discussion list

[Sebastien Loriot <>]

What version of CGAL are you using?

Sebastien

On 1/5/21 8:47 PM, David Rochera wrote:
> > Hello, I'm new in CGAL and in this mailing list,
> >
> > I have been trying for many days to solve an OpenGL problem I have 
> > when running some CGAL examples and demos but I could not solve it 
> > yet. If some of you know the answer to this question I would be very 
> > grateful. :)
> >
> > I'm using a fairly new Mac OS, where I have installed the last 
> > versions of CGAL, Qt5 and many other optional libraries. The OpenGL 
> > support was discontinued for Apple some years ago, so that my GL Core 
> > version is up to 4.1. The problem is that after compiling and running 
> > some CGAL examples and demos I get the warning:
> >
> > GL 4.3 context initialization failed.
> >
> > Using context  2 . 1 GL
> >
> >
> > This results in not being able to see vertices nor edges in the 
> > Basic_viewer. I'm wondering how the 4.1 context could be set in order 
> > to avoid such an issue. Looking at the CGAL Qt files, I can guess 
> > that the 4.3 context is tried to be set and, if not found, the ES 2.0 
> > context is displayed instead. Nevertheless, I guess there should be a 
> > way to display the highest possible Mac OS context 4.1 because the 
> > Polyhedron demo, for instance, works fine for me. If I run it, I can 
> > see vertices and edges and indeed I get:
> >
> > Using context  4 . 1 GL
> >
> >
> > If the problem is regarding the OS, there should be many affected 
> > CGAL users but I haven't found many people speaking about it in any 
> > forum... so I don't know if I'm missing something.
> >
> >
> > Thank you very much and best wishes,
> >
> >
> > David
>
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