[osg-users] polygon index error

[Michele Bosi]

Updating to MESA 7.0.2 actually fixed the problem :)
So it seems that the MESA distributed with Ubuntu 7.04 is actually
bugged (and they didn't provide any update for it except the
possibility to update the whole distribution to 7.10).

Thanks again Alberto,
Michele

On Jan 22, 2008 10:43 AM, Michele Bosi <michele.bosi at gmail.com> wrote:
> Thank you very much Alberto,
> I will try to update my Mesa version to the latest to see if that
> fixes the problem.
>
> Regards,
> Michele
>
>
> On Jan 22, 2008 9:55 AM, Alberto Luaces <aluaces at udc.es> wrote:
> > El Monday 21 January 2008 18:12:50 Michele Bosi escribió:
> >
> > > I have a strange problem with my marching cube algorithm when the mesh
> > > generated is bigger than 3700 polygons more or less (I am using
> > > indexed polygons).
> > > The problem seems to be the Linux MESA driver (Ubuntu 7.04) since
> > > under WinXP everything works well.
> > > I also tried to disable the display lists and VBOs to see if the
> > > driver reacted in anyway but with no result.
> > >
> > > Did anyone experienced a similar problem?
> > > Is there any OSG/OpenGL limit (maybe platform or driver dependent) to
> > > the polygons one can insert in an osg::DrawElementsUInt?
> > > Cutting the mesh into 3500 polygon chunks could be a temporary (and
> > > poor) solution... any other suggestion?
> > >
> > > Thanks,
> > > Michele
> >
> > There were some problems belonging to the versions of mesa-glx package that
> > Ubuntu 7.04 and 7.10 shipped (I think it is solved on 7.10 now). I had
> > crashes on 7.04 while editing meshes in Blender related to and out-of-bounds
> > error with VBOs. I read somewhere that new versions of Mesa try to use VBOs
> > under the hood in the most situations it can, so maybe this explains why
> > activating/deactivating VBOs and display lists doesn't make a difference.
> > Here is the bug error I posted time ago:
> >
> > https://bugs.launchpad.net/mesa/+bug/109405
> >
> > With 7.04, you can either roll back to the 6.5.1 version or try to update the
> > package in order to get a fix. You can also compile from source.
> >
> > Alberto
> > _______________________________________________
> > osg-users mailing list
> > osg-users at lists.openscenegraph.org
> > http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
> >
>