How to avoid prog crashes on Saturn flight

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Topic author
Renato Gallmetzer

How to avoid prog crashes on Saturn flight

Post #1by Renato Gallmetzer » 31.05.2002, 22:17

The prog crashes near Saturn seems not to be related to hardware or "drivers", but IMHO the cause seems to be in the displaying of the rings.
After adding a comment # to "Rings" of Saturn and Neptune in solarsys.ssc the program don't crashes everymore, but obvously the rings are NOT displayed anymore.

Add comment in "solarsys.ssc" like:

# Rings {
# Inner 74658
# Outer 140000
# Texture "saturn-rings.png"
# Color [ 1.0 0.88 0.82 ]
# }

and

# Rings {
# Inner 41800
# Outer 51149
# Texture "uranus-rings.png"
# }


Hopefully in the next release of celestia this bug would removed!

Bye, Renato.

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t00fri
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Age: 18
With us: 18 years 6 months
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How to avoid prog crashes on Saturn flight

Post #2by t00fri » 31.05.2002, 23:49

Renato Gallmetzer wrote:The prog crashes near Saturn seems not to be related to hardware or "drivers", but IMHO the cause seems to be in the displaying of the rings.
After adding a comment # to "Rings" of Saturn and Neptune in solarsys.ssc the program don't crashes everymore, but obvously the rings are NOT displayed anymore.

Add comment in "solarsys.ssc" like:

# Rings {
# Inner 74658
# Outer 140000
# Texture "saturn-rings.png"
# Color [ 1.0 0.88 0.82 ]
# }

and

# Rings {
# Inner 41800
# Outer 51149
# Texture "uranus-rings.png"
# }


Hopefully in the next release of celestia this bug would removed!

Bye, Renato.


The crash is related to the multi-texture shadow rendering
of the rings. We know exactly where the bug occurs, only the cause is not yet quite clear. A much better workaround than the above is as follows:

In the routine src/celengine/render.cpp add right behind the lines
glGetIntegerv(GL_MAX_TEXTURE_UNITS_ARB,(GLint*) &nSimultaneousTextures);

the statement

nSimultaneousTextures = 1;

and recompile the code. This should avoid the crash. However the ring shadows are not anymore rendered.

Bye Fridger

The crash does occur with ATI Rage cards but not with my NVIDIA Geforce 2 GTS, for example.

Topic author
Renato Gallmetzer

How to avoid prog crashes on Saturn flight

Post #3by Renato Gallmetzer » 03.06.2002, 13:19

The crash does occur with ATI Rage cards but not with my NVIDIA Geforce 2 GTS, for example.


... and happens also on Matrox MGA G400 AGP cards!

So long,
Renato.

Christian.Boehme

Crashes also on my GF2 with 2313 drivers...

Post #4by Christian.Boehme » 08.06.2002, 15:31

As said in the title... to those for whom it does not crash with GeForce cards: Which drivers and version of XFree (if under Linux) do you use? I use
XFree 4.02 and 2313 drivers. Thanks ...

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t00fri
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Posts: 8772
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Age: 18
With us: 18 years 6 months
Location: Hamburg, Germany

Crashes also on my GF2 with 2313 drivers...

Post #5by t00fri » 08.06.2002, 15:49

Christian.Boehme wrote:As said in the title... to those for whom it does not crash with GeForce cards: Which drivers and version of XFree (if under Linux) do you use? I use
XFree 4.02 and 2313 drivers. Thanks ...


XFree 4.x and driver versions do not seem to be relevant.

Please, if you want help, specify /exactly/ what Linux ( SuSE?) and what glx-headers you are using.

a) from mesa-devel package
b) from xf86glx-devel package


Which NVIDIA card?

Bye Fridger

Christian.Boehme

Crashes also on my GF2 with 2313 drivers...

Post #6by Christian.Boehme » 08.06.2002, 18:51

t00fri wrote:
Christian.Boehme wrote:As said in the title... to those for whom it does not crash with GeForce cards: Which drivers and version of XFree (if under Linux) do you use? I use
XFree 4.02 and 2313 drivers. Thanks ...

XFree 4.x and driver versions do not seem to be relevant.

Please, if you want help, specify /exactly/ what Linux ( SuSE?) and what glx-headers you are using.

a) from mesa-devel package
b) from xf86glx-devel package


Which NVIDIA card?

Bye Fridger


Here we go:
I use SuSE 7.1, but with updatet kernel (2.4.16) and Xfree (4.0.2). The glx header is from the mesadev-3.4-7 package. It says:

Code: Select all

/* $Id: glx.h,v 1.22 2000/06/23 17:39:18 brianp Exp $ */

/*
 * Mesa 3-D graphics library
 * Version:  3.3


On the hardware side I use a GeForce 2 GTS.

Hope this helps. BTW, Celestial also crashes when I choose per pixel lighting. Nevertheless, I reall like this program!

Christian

Christian.Boehme

Post #7by Christian.Boehme » 08.06.2002, 18:55

Forgot one thing. I also tried to use the headers provided by nvidia, but those wouldn't work (many double declarations):

Code: Select all

** $Header: //sw/OEM/nvr20-linux1/drivers/OpenGL/win/glx/include/glx.h#1 $
[/code][/quote]

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t00fri
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Posts: 8772
Joined: 29.03.2002
Age: 18
With us: 18 years 6 months
Location: Hamburg, Germany

Post #8by t00fri » 08.06.2002, 19:40

Christian.Boehme wrote:Forgot one thing. I also tried to use the headers provided by nvidia, but those wouldn't work (many double declarations):

Code: Select all

** $Header: //sw/OEM/nvr20-linux1/drivers/OpenGL/win/glx/include/glx.h#1 $
[/code]
[/quote]
Christian:
---------

That's much better info! Warum nicht gleich...

Your system is quite similar to mine, which does /not/ show the crashes
due to multi-texture shadow rendering of the ring planets. So there is
hope...

I use SuSE 7.3 (with all latest updates & kernel 2.4.18) and also have
a GeForce 2 GTS/32MB card. I have tried all drivers including the latest
(2960) and went back to 1541, which gives the best performance
for my card (e.g. glxgears: 2592 fps vs 2390 fps for the latest
version). Everything is /very/ stable on my system, notably also for
Celestia. I use the following packages:

XFree: 4.2.0-64
xf86glu-devel-4.1.0-63
xf86glu-4.1.0-63
mesaglut-3.4.2-57
mesaglut-devel-3.4.2-57
mesa-devel-3.4.2-57
gtkglarea-1.2.2-150
gtk-1.2.10-258
gtk-devel-1.2.10-258
...

All these updates you also should find on the SuSE X-server for SuSE
7.1 as well.

Note: There is still a known crash under Linux if you activate Vertex
shading for planets with an external bumpmap file (in
solarsys.ssc). E.g. Mercury.

Finally, I can only recommend to download the latest CVS version from the
SourceForge development site, since I have made quite a number of
improvements for the Linux version there. All keys now work under
Linux as well as the mouse functions etc...A few days ago, I gave an
instruction in this forum, how to access/use CVS.

Good luck

Bye Fridger

Christian.Boehme

Post #9by Christian.Boehme » 10.06.2002, 21:43

t00fri wrote:version). Everything is /very/ stable on my system, notably also for
Celestia. I use the following packages:

XFree: 4.2.0-64
xf86glu-devel-4.1.0-63
xf86glu-4.1.0-63
mesaglut-3.4.2-57
mesaglut-devel-3.4.2-57
mesa-devel-3.4.2-57
gtkglarea-1.2.2-150
gtk-1.2.10-258
gtk-devel-1.2.10-258
...

Finally, I can only recommend to download the latest CVS version from the
SourceForge development site, since I have made quite a number of
improvements for the Linux version there. All keys now work under
Linux as well as the mouse functions etc...A few days ago, I gave an
instruction in this forum, how to access/use CVS.


Hm, this requires more time than I have to spend during this week. I will try it next weekend & will post if it worked. Until then I just watch Saturn without ring shadows. Celestia sure looks nice as it is!

Christian


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