Hi, 

when writing an own Nodecore, I faced similar problems. The solution in my case 
was to "unbind" the buffer with 
glBindBuffer(GL_ARRAY_BUFFER,0);
after usage. Maybe it helps.

Daniel

-------- Original-Nachricht --------
> Datum: Fri, 29 Jan 2010 16:13:27 +0100
> Von: "Andreas Halm" <andreas.h...@fraunhofer.at>
> An: opensg-users@lists.sourceforge.net
> Betreff: Re: [Opensg-users] Graphic Errors

> Hi,
> 
> 
> > > > Another question you don't shadow OpenSG objects ?, e.g. have an
> > OpenSG
> > > > property but upload the data outside OpenSG. I changed some code in
> > > > this path (e.g IIRC something did not work as expected) so I might
> > have
> > > > enabled something that interferes with what you do. If you can,
> > could
> > > > you go back to before version 2153 as this one does the initial vbo
> > > > code
> > > > path changes.
> > >
> > > If I understood correctly then no I don't shadow OpenSG objects. Just
> > to be
> > > absolutely clear, I do all the
> > > glGenBuffersARB, glBindBufferARB, glBufferDataARB and
> > glBufferSubDataARB
> > > stuff myself, but the whole thing is contained in a FC.
> > 
> > that's the first half, setting up the data, which element does the
> > drawing, e.g. use the data ?
> 
> The same FC object. Nothing fancy ;-)
> Also the problem must be the setup, not the drawing, as the errors are not
> truly random - once the uploading is finished, the graphic errors always
> stay the same and you can look at them in detail :-) Funnily enough, most
> of
> the data gets transferred correctly.
> 
> > > It must have something to do with Windows 7 though (or the Win7
> > driver), the
> > > display code did not change in the last 6 month ...
> > 
> > This unfortunately is still a possibility. I don't have a Window7
> > machine so I can't really test in this environment. Do you have
> > access to an older Windows version (say xp) or is there anyway
> > somebody else can test it ?
> 
> Well what do you know, it does work under XP. However, an internet search
> on
> OpenGL problems on Windows 7 does not turn out anything interesting. So if
> anybody has an idea where to look ...
> 
> Aloha, Andi
> 
> 
> 
> 
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