[GRASS-user] NVIZ grass6.1 cvs, crash

Robert_Kringel · August 9, 2006, 8:12am

Dear all,

We are currently running grass6.1 CVS-Version (20/05/2006) compiled
for a Pentium IV running under Suse Linux 10.1. The Computer has a
i845 Intel-onboard graphics chips. The Xserver uses the module i810.
Everything seemed fine.

we are working mainly with the r3.modules to visualize contamination
clouds interpolated with v.vol.rst. Trying to visualize volume-maps
crashes NVIZ in three ways.

1. calling NVIZ from gis.m produces 2 Windows, which soon dissappear
without further message

2. calling NVIZ from the grass prompt with "NVIZ &" and adding a 3d-map
immediately crashes NVIZ

3. calling NVIZ from the grass prompt with "NVIZ &" without data, loads
the NVIZ program. NVIZ also loads the 3dmap, trying to set an isosurface
seems to work, but visualization fails. The program does also not show
the usual frame.

A hint would be highly appreciated:

-- Is 3d acceleration mandatory for work with NVIZ ?
-- could this be a missing graphics-library?
-- Are there any known problems with NVIZ (separate setup,
do I have to recompile)
-- How can I stop this behavior?

best regards,

Robert

cmbarton · August 9, 2006, 5:33pm

There have been a number of important fixes and changes to nviz since 5 May
2006. You should get a new version. 6.1 has been in official beta now for
several weeks and is due for a final release in a day or so.

Michael
__________________________________________
Michael Barton, Professor of Anthropology
School of Human Evolution & Social Change
Center for Social Dynamics and Complexity
Arizona State University

phone: 480-965-6213
fax: 480-965-7671
www: http://www.public.asu.edu/~cmbarton

From: Robert Kringel <r.kringel@bgr.de>
Date: Wed, 9 Aug 2006 08:12:35 +0000 (UTC)
To: <grassuser@grass.itc.it>
Subject: [GRASS-user] NVIZ grass6.1 cvs, crash

Dear all,

We are currently running grass6.1 CVS-Version (20/05/2006) compiled
for a Pentium IV running under Suse Linux 10.1. The Computer has a
i845 Intel-onboard graphics chips. The Xserver uses the module i810.
Everything seemed fine.

we are working mainly with the r3.modules to visualize contamination
clouds interpolated with v.vol.rst. Trying to visualize volume-maps
crashes NVIZ in three ways.

1. calling NVIZ from gis.m produces 2 Windows, which soon dissappear
without further message

2. calling NVIZ from the grass prompt with "NVIZ &" and adding a 3d-map
immediately crashes NVIZ

3. calling NVIZ from the grass prompt with "NVIZ &" without data, loads
the NVIZ program. NVIZ also loads the 3dmap, trying to set an isosurface
seems to work, but visualization fails. The program does also not show
the usual frame.

A hint would be highly appreciated:

-- Is 3d acceleration mandatory for work with NVIZ ?
-- could this be a missing graphics-library?
-- Are there any known problems with NVIZ (separate setup,
do I have to recompile)
-- How can I stop this behavior?

best regards,

Robert

Glynn_Clements1 · August 9, 2006, 7:33pm

Robert Kringel wrote:

We are currently running grass6.1 CVS-Version (20/05/2006) compiled
for a Pentium IV running under Suse Linux 10.1. The Computer has a
i845 Intel-onboard graphics chips. The Xserver uses the module i810.
Everything seemed fine.

we are working mainly with the r3.modules to visualize contamination
clouds interpolated with v.vol.rst. Trying to visualize volume-maps
crashes NVIZ in three ways.

1. calling NVIZ from gis.m produces 2 Windows, which soon dissappear
without further message

2. calling NVIZ from the grass prompt with "NVIZ &" and adding a 3d-map
immediately crashes NVIZ

3. calling NVIZ from the grass prompt with "NVIZ &" without data, loads
the NVIZ program. NVIZ also loads the 3dmap, trying to set an isosurface
seems to work, but visualization fails. The program does also not show
the usual frame.

A hint would be highly appreciated:

-- Is 3d acceleration mandatory for work with NVIZ ?

No. OpenGL is mandatory, but it doesn't have to be accelerated.
Whether the performance difference matters depends upon the resolution
of the data.

-- could this be a missing graphics-library?

No. If you don't have the OpenGL libraries, NVIZ won't even run.

-- Are there any known problems with NVIZ (separate setup,
do I have to recompile)
-- How can I stop this behavior?

NVIZ problems are usually due to either a bug in the DRI/DRM drivers,
a bug in a vendor-supplied OpenGL library, or
installation/configuration problems (e.g. using the standard X.org
OpenGL library with a DRI driver which requires the vendor's library).

It may help to type:

export LIBGL_ALWAYS_INDIRECT=1

before running NVIZ. This will disable the use of DRI/DRM (hardware 3D
acceleration) and use the X server's software 3D renderer.
Alternatively, you could try using Mesa (a client-side software OpenGL
implementation).

--
Glynn Clements <glynn@gclements.plus.com>

Slover_Kevin · August 9, 2006, 7:53pm

Robert,
And am sure that you have checked this, but is coming from a person
that saw the same thing as you have...

When starting NVIZ from the command prompt, do you see any error warning
from TCL/TK?? I had to link the libtk8.4.so and libtcl8.4.so libraries
from /usr/local/lib to /usr/lib. When doing this, it resolved my
issues.

Search the archives, using libtk8.4.so and nviz I think, and it comes up
with a few threads on this...

Might be more on the basic side, but always check to make sure things
are "plugged in" properly...

Kevin Slover
Coastal / GIS Specialist
2872 Woodcock Blvd Suite 230
Atlanta GA 30341
(P) 678-530-0022
(F) 678-530-0044

-----Original Message-----
From: grassuser-bounces@grass.itc.it
[mailto:grassuser-bounces@grass.itc.it] On Behalf Of Robert Kringel
Sent: Wednesday, August 09, 2006 4:13 AM
To: grassuser@grass.itc.it
Subject: [GRASS-user] NVIZ grass6.1 cvs, crash