[GRASS5] Re: NVIZ crashes

[Markus Neteler]

On Mon, Aug 13, 2001 at 12:26:26PM -0400, Helena Mitasova wrote:
> Markus Neteler wrote:
> 
> > Hi all NVIZ lovers,
> >
> > an update on Redhat7.1/Nviz crashes:
> > It seems to be related to Xfree86. I have a Matrox G450 card
> > running and Xfree 4.0.3 with DRI activated (= nviz crashes
> > the server).
> >
> > After disabling DRI (direct rendering) it works fine...
> > In case of this problems, check your /etc/X11/XF86Config-4
> > and disable
> > #       Load "dri"
> > #       Load  "glx"
> >
> > restart the Xserver and try agin NVIZ.
> 
> but then I am getting the following
> is there anything else that I need to do? I have NVIDIA and it needs
> the glx. But these are things that I absolutely don't know anything
> about.
> 
> Adding panels from /usr/local/grass5/etc/nviz2.2/scripts
> Nv_(panels)
> toplevel made
> Error in startup script: Togl: X server has no OpenGL GLX extension
>     while executing
> "togl $BASE.canvas -rgba true -double true -depth true "
>     (procedure "Nv_makeGUI" line 24)
>     invoked from within
> "Nv_makeGUI .top"
>     (file "/usr/local/grass5/etc/nviz2.2/scripts/nviz2.2_script" line
> 637)
> child process exited abnormally
>     while executing
> "exec /usr/local/grass5/etc/nviz2.2/NVWISH2.2 -f
> /usr/local/grass5/etc/nviz2.2/scripts/nviz2.2_script -q -name NVIZ
> >&@stdout"
>     ("eval" body line 1)
>     invoked from within
> "eval exec $env(GISBASE)/etc/nviz2.2/NVWISH2.2 -f
> $env(GISBASE)/etc/nviz2.2/scripts/nviz2.2_script $argv -name NVIZ
> >&@stdout"
>     invoked from within
> "if {$argv == ""} {
> #no arguments
> eval exec $env(GISBASE)/etc/nviz2.2/NVWISH2.2 -f
> $env(GISBASE)/etc/nviz2.2/scripts/nviz2.2_script -name NVIZ >&@stdo..."
>     (file "/usr/local/grass5/bin/nviz" line 13)

Helena,

I guess you have to
 - either install MESA (for software openGL) or
 - upgrade to Xfree 4.1.0

> > But... starting
> >  nviz dem
> > and
> >  nviz -q dem
> >
> > leads to different values for zexxag...
> 
> that is correct, you are not supposed to put anything after nviz -q : it
> is for opening nviz
> without any input and uses different initial setting than if you give it

... if so, it should *ignore* additional data and print a warning
respectively (sorry, mostly I don't read documentation :-).

> a file (without -q) -
> then it computes the initial settings from your data. I actually use
> nviz -q more often
> because the tuning of viewing parameters works better than when they are
> computed
> from the data (but this is an old issue related to the differences
> between SG3d and nviz controls)
> >
> > Anyway, NVIZ seems to work again.
> 
> not yet for me,
> 
> Helena

hopefully soon,

Markus