Hi Smilen,
On Mon, 2005-11-28 at 10:16 +0100, Smilen Dimitrov wrote:
>
> So I guess this is the reason why these other volume rendering C
> examples do not
> want to run.
Yup.
> But then, it makes it even more surprising how is it possible to
> run the OpenSG volume renderer examples. Even stranger - after a suggestion on
> the forum above (that it will be possible to run in software mode - slow), I
> found a software emulation key in the OpenGL Extensions Viewer and I
> tried it -
> the other C volume rendering examples would still not run, OpenSG volume
> rendering examples would run slow - if I turned off software emulation again,
> OpenSG volume rendering examples would again run smooth!!
>
> Well, after knowing this, I am very pleasantly surprised that OpenSG volume
> renderer examples can run at all on my machine :) But how come?
The OpenSG VolRen lib is written in a way that can use 2D textures as an
alternative to the 3D textures normally used. It takes more texture
memory, and is not quite a good visually, but it works. Note that this
will probably go away in the future, though, so enjoy it while you
can. ;)
> Is this
> hardware problem possibly a reason for not being able to run VR Juggler and
> OpenSG volme rendering together ?
No, that shouldn't be. I'm more inclined to think about different
rendering modes. Different Volume Shaders use different modes, and not
all of them work with 2D textures.
The most interesting data you can get from the debugger is the Stack
Trace, which shows you exactly in which line it crashed, otherwise it's
pretty hard to see what might be going wrong.
But honestly I would recommend buying a new graphics card if possible.
Even a low-end card like an FX5200 should be faster than your GF4, and
they are pretty affordable these days (starting at around $30).
Yours
Dirk
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