[osg-users] (no subject)

[Anders Backman]

Yep sorry. I was having some (other) issue where text was not rendered when
I had enabled shadows, so I was messing with osgViewer.cpp copying sample
code from osgShadow there.

The example that reveals the issue at shutdown is plainly osgShadow.cpp


Output:

osgshadow.exe --window 0 0 1024 768
FOV is 29.1484
Error: OpenGL version test failed, requires valid graphics context.

And a crasch. Interestingly only if you first move the camera (left mouse
move) in the graphics window.
If you do not interact with the scene, it only show the error message.

/Anders



On Thu, Feb 4, 2016 at 11:57 AM, Robert Osfield <robert.osfield at gmail.com>
wrote:

> Hi Anders,
>
> There is a new mechanism for managing clean up of GL objects, which in
> theory should help improve management of lifetimes of GL objects.
>
> The warning suggests that something is try to do GL call after the
> context is cleaned up, I don't know yet if this is a bug in the new
> code or whether the new code is just revealling an old bug elsewhere.
>
> Could you be more specific of how to reproduce the problem as there
> isn't an --ssm option supported by the osgviewer example.
>
> Robert.
>
>
> On 4 February 2016 at 09:05, Anders Backman <andersb at cs.umu.se> wrote:
> > Hi all.
> >
> > Trying OSG 3.5.1 and I have started to get some problems with objects
> > (osg::Program/osg::Shaders etc.) being de-allocated after context is
> > destroyed:
> >
> > Error: OpenGL version test failed, requires valid graphics context.
> >
> >
> > Sometime it crasches sometimes it just print the warning.
> >
> > I can reproduce it with osgViewer --ssm
> >
> > The only solution so far has been to keep a static reference to the
> camera
> > in the scene, which feels a lot like a hack.
> > The same code worked in 3.4.0. So as you wrote in an earlier post, this
> > probably reveals something that was not deallocated before.
> >
> > As soon as the viewer is destroyed, it takes the camera with it. Hence
> the
> > Context is also destroyed.
> >
> > Not sure how to handle this in an general way.
> >
> > /Anders
> >
> >
> > --
> > __________________________________________
> > Anders Backman, HPC2N
> > 90187 Umeå University, Sweden
> > anders at cs.umu.se http://www.hpc2n.umu.se
> > Cell: +46-70-392 64 67
> >
> > _______________________________________________
> > osg-users mailing list
> > osg-users at lists.openscenegraph.org
> >
> http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
> >
> _______________________________________________
> osg-users mailing list
> osg-users at lists.openscenegraph.org
> http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
>



-- 
__________________________________________
Anders Backman, HPC2N
90187 Umeå University, Sweden
anders at cs.umu.se http://www.hpc2n.umu.se
Cell: +46-70-392 64 67
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.openscenegraph.org/pipermail/osg-users-openscenegraph.org/attachments/20160204/eaf05424/attachment-0003.htm>