geomview-users — Geomview users' discussion list

[geomview-users] OpenGL rendering now working?

[<llo...@us...>]

I'm setting up Geomview on new Win10 laptop, under the Windows Subsystem for Linux (WSL2) subsystem, with the default Ubuntu image
and packages.

Everything works as you might expect... except OpenGL. Running

$ which geomview
/usr/bin/geomview
$ geomview &

gets a blank camera viewport the colour of the set background colour. (And opening up a new camera segfaults Geomview.)

Running

geomview -noopengl &

works as you might expect; the clock, SaVi etc. all draw as intended. I'm glad that flag is still there...

Any hints on how to figure out what broke where in which driver? Geomview installed as a package with all dependencies without complaint, so there's nothing obvious there. The X client seems somehow internal to WSL2, rather than needing an extra like Xming, which I've had to use previously, suggesting it's likely something to do with that.

thanks

Lloyd Wood
SaVi for Geomview http://savi.sf.net/

[geomview-users] Atomic Orbital Plotting with Geomview

[Larry P. <lp...@co...>]

For those who may be interested, I have used Geomview, in conjunction
with the StageTools module, to create visualizations of atomic orbitals,
including videos.

The web page is located here:

http://lapiet.info/mathphys/AO/ao_plotting.html

My only concern is that Geomview does not perform anti-aliasing
and thus some graphics may contain "jaggies" when rotated or
tranformed.

But otherwise, Geomview is a superb tool for this type of work.

[geomview-users] Geomview and SaVi demonstrating intersatellite links

[<llo...@us...>]

I stumbled across a video suggesting a variant of SaVi has been modified to simulate intersatellite links -- functionality which doesn't yet exist in mainstream SaVi releases. A video showing Geomview demonstrating it on current constellations with a ridiculously large number of satellites is here:


https://www.youtube.com/watch?v=M49yyJ0o5YU



This is related to some work presented to the Internet Engineering Task Force at IETF 112 in November 2021.

https://datatracker.ietf.org/meeting/112/materials/slides-112-rtgwg-3-satelite-semantic-addressing-00

But, other than that, I know nothing about this SaVi variant or its capabilities, other than knowing that seeing satellite names and the constellation help text window in that video means that the modifications start from a base of SaVi post version 1.4.1.

I did find it interesting comparing this demonstration of SaVi in 2021 with an early video of SaVi from 1996 (thanks, Tamara!).

https://www.youtube.com/watch?v=-0UThhgVtKg

...not least of which is that everything is running over Windows (with XMing for display on the Ubuntu linux subsystem) these days.

best

Lloyd Wood
llo...@us...


SaVi satellite constellation visualization http://savi.sf.net/

[geomview-users] Antiprism 0.29 Released

[Adrian R. <ad...@an...>]

Hi All

Antiprism 0.29 polyhedron modelling software has been released

      http://www.antiprism.com/download

Windows 32-bit and 64-bit installers and Ubuntu binary packages are
available. Source code is provided for other systems.

The programs all work natively with OFF format.

There is an examples album here

    http://www.antiprism.com/examples/

Adrian.
-- 
Adrian Rossiter
ad...@an...
http://antiprism.com/adrian

Re: [geomview-users] inststream.c:271:35: warning: duplicated 'if' condition [-Wduplicated-cond]

[Stuart L. <sa...@il...>]

It looks as though this bug only prevents writing-out geom objects that 
use a feature which is probably not widely used (if ever): INST objects 
which contain an array of *texture-map* transformations 
("txtransforms").   The common kind of INST has geometric transforms 
instead.   We didn't use txtransforms in any of the prepackaged data 
examples.   It's possible that nobody ever did use that feature.

I think the attached patch may fix this bug, FWIW.


On 10/26/21 07:08, Larry Piet wrote:
> On Mon, 25 Oct 2021 21:31:27 +1100
> Lloyd W via geomview-users<geo...@li...>  wrote:
>
>> I'm not sure where active geomview development is at this point
>> (sourceforge cvs is now read-only) - there was a git repository? So I
>> haven't yet checked an active source tree.
>>
> The active source tree is here:
>
> https://github.com/geomview/geomview
>
>
> The file "src/lib/gprim/inst/inststream.c" still contains the
> questionable lines.
>
> How would this faulty code be manifest in the operation or output
> of Geomview?  I use geomview frequently and have not experienced
> any problems but then I don't use all of its features.  Is there
> a way to trigger this section of code?
>
> Also, the OP may want to post this issue to the github list here:
>
> https://github.com/geomview/geomview/issues
>
>
>
> _______________________________________________
> geomview-users mailing list
> geo...@li...
> https://urldefense.com/v3/__https://lists.sourceforge.net/lists/listinfo/geomview-users__;!!DZ3fjg!pycbkUehljsaAfpzp33BB6EdtXFXXtLJpG51W74PSIdGCp7vG9s_jAByamcdXBbyNg$  

Re: [geomview-users] inststream.c:271:35: warning: duplicated 'if' condition [-Wduplicated-cond]

[Larry P. <lp...@co...>]

On Mon, 25 Oct 2021 21:31:27 +1100
Lloyd W via geomview-users <geo...@li...> wrote:

> 
> I'm not sure where active geomview development is at this point
> (sourceforge cvs is now read-only) - there was a git repository? So I
> haven't yet checked an active source tree.
> 

The active source tree is here:

https://github.com/geomview/geomview

The file "src/lib/gprim/inst/inststream.c" still contains the
questionable lines.

How would this faulty code be manifest in the operation or output
of Geomview?  I use geomview frequently and have not experienced
any problems but then I don't use all of its features.  Is there
a way to trigger this section of code?

Also, the OP may want to post this issue to the github list here:

https://github.com/geomview/geomview/issues

Re: [geomview-users] inststream.c:271:35: warning: duplicated 'if' condition [-Wduplicated-cond]

[Lloyd W <llo...@ya...>]

Thanks, David.

you previously reported this in January 2019

https://sourceforge.net/p/geomview/mailman/geomview-users/?viewmonth=201901

but the 1.9.5 geomview package of course predates that first report by some years. I presume you built 1.9.5?

I'm not sure where active geomview development is at this point (sourceforge cvs is now read-only) - there was a git repository? So I haven't yet checked an active source tree.

regards

Lloyd Wood
http://savi.sf.net/

> On 25 Oct 2021, at 20:44, David Binderman <dc...@ho...> wrote:
> 
> 
> Hello there,
> 
> Source code is
> 
>     if(inst->tlist != NULL || inst->tlisthandle != NULL) {
>         PoolFPrint(pool, outf, "transforms ");
>         ok &= GeomStreamOut(pool, inst->tlisthandle, inst->tlist);
>     } else if(inst->tlist != NULL || inst->tlisthandle != NULL) {
>         PoolFPrint(pool, outf, "txtransforms ");
> 

[geomview-users] inststream.c:271:35: warning: duplicated 'if' condition [-Wduplicated-cond]

[David B. <dc...@ho...>]

Hello there,

Source code is

    if(inst->tlist != NULL || inst->tlisthandle != NULL) {
        PoolFPrint(pool, outf, "transforms ");
        ok &= GeomStreamOut(pool, inst->tlisthandle, inst->tlist);
    } else if(inst->tlist != NULL || inst->tlisthandle != NULL) {
        PoolFPrint(pool, outf, "txtransforms ");

Regards

David Binderman

Re: [geomview-users] Useful Website for Geomview

[Lloyd W <llo...@ya...>]

Thanks Fabian, I've added a link to this on
http://www.geomview.org/thirdparty/

Lloyd Wood
http://savi.sf.net/

> On 28 Jul 2021, at 20:18, Fabian Russell <fr3...@gm...> wrote:
> 
> The following website may be of interest to Geomview users:
> 
> https://ayapin-film.sakura.ne.jp/Gnuplot/Tips/geomview.html
> 
> Basically, the author has written a utility that converts a Gnuplot
> table into a Geomview
> mesh file.  This allows the use of Gnuplot to create Geomview objects.
> The entire process
> is automated within a Gnuplot script file.
> 
> The website is written in Japanese but the example scripts are in English.
> 
> The idea is very similar to the StageTools module for Geomview:
> 
> http://www.math.union.edu/software/StageTools/
> 
> The Gnuplot --> Geomview program could also be modified by the user to convert
> other text-delimited formats.
> 
> Note that some of the example scripts contain syntax errors but these are easily
> corrected.
> 
> FR
> 
> 
> _______________________________________________
> geomview-users mailing list
> geo...@li...
> https://lists.sourceforge.net/lists/listinfo/geomview-users

[geomview-users] Useful Website for Geomview

[Fabian R. <fr3...@gm...>]

The following website may be of interest to Geomview users:

https://ayapin-film.sakura.ne.jp/Gnuplot/Tips/geomview.html

Basically, the author has written a utility that converts a Gnuplot
table into a Geomview
mesh file.  This allows the use of Gnuplot to create Geomview objects.
The entire process
is automated within a Gnuplot script file.

The website is written in Japanese but the example scripts are in English.

The idea is very similar to the StageTools module for Geomview:

http://www.math.union.edu/software/StageTools/

The Gnuplot --> Geomview program could also be modified by the user to convert
other text-delimited formats.

Note that some of the example scripts contain syntax errors but these are easily
corrected.

 FR

Re: [geomview-users] Geomview Pisces Module

[Lloyd W <llo...@ya...>]

Ah. look for and download the Pisces tarball from under
ftp://www.geom.uiuc.edu/pub/software/

(Mark, you need to regexp search/replace fix all ftp links in the uiuc webspace - as well as this Pisces link, all the old Geomview source/binary ftp links on the old download webpage are affected as well.)

Lloyd Wood
http://savi.sf.net/

> On 25 Sep 2020, at 23:47, Fabian Russell <fr3...@gm...> wrote:
> 
> On Sun, Sep 20, 2020 at 7:03 AM Lloyd W <llo...@ya...> wrote:
>> 
>> See
>> 
>> http://www.geom.uiuc.edu/~fjw/pisces/
>> 
>> The server content was preserved when it moved from umn to uiuc, but umn isn't running a virtual server just to do a full server redirect.
>> 
> 
> Thanks.  That link does work, but the link given therein for the
> source download is broken:
> 
> http://www.geom.uiuc.edu/~fjw/pisces/download/source.html
> 
> This link still points to the umn.edu.  I tried changing it to
> uiuc.edu but no joy.

Re: [geomview-users] Geomview Pisces Module

[Fabian R. <fr3...@gm...>]

On Sun, Sep 20, 2020 at 7:03 AM Lloyd W <llo...@ya...> wrote:
>
> See
>
> http://www.geom.uiuc.edu/~fjw/pisces/
>
> The server content was preserved when it moved from umn to uiuc, but umn isn't running a virtual server just to do a full server redirect.
>

Thanks.  That link does work, but the link given therein for the
source download is broken:

http://www.geom.uiuc.edu/~fjw/pisces/download/source.html

This link still points to the umn.edu.  I tried changing it to
uiuc.edu but no joy.

Re: [geomview-users] Geomview Pisces Module

[Lloyd W <llo...@ya...>]

Fabian,

See

http://www.geom.uiuc.edu/~fjw/pisces/

The server content was preserved when it moved from umn to uiuc, but umn isn't running a virtual server just to do a full server redirect.

Lloyd Wood
http://savi.sf.net/

> On 20 Sep 2020, at 06:41, Fabian Russell <fr3...@gm...> wrote:
> 
> Does anyone know if the Pisces module for Geomview is still in existence?
> 
> It is mentioned in this post from the Geomview list:
> 
> https://geomview.sourceforge.io/docs/sgarchive/msg04333.shtml
> 
> The link given in the post is dead.
> 
> It has been  a long time since then but it is possible that the source
> for Pisces is still available

[geomview-users] Geomview Pisces Module

[Fabian R. <fr3...@gm...>]

Does anyone know if the Pisces module for Geomview is still in existence?

It is mentioned in this post from the Geomview list:

https://geomview.sourceforge.io/docs/sgarchive/msg04333.shtml

The link given in the post is dead.

It has been  a long time since then but it is possible that the source
for Pisces
is still available.

Re: [geomview-users] Shader Compiler Programs?

[<llo...@ya...>]

I know these programs exist, but that's about the size of it. I understand that support for this was introduced by Claus in Geomview 1.9.0.


https://en.wikipedia.org/wiki/Aqsis


https://sourceforge.net/projects/pixie/Pixie 
http://www.renderpixie.com/pixie_renderer.html 


https://www.3delight.com/


To quote

https://sourceforge.net/p/geomview/mailman/geomview-users/thread/463...@ma.../


- the RenderMan MG-backend now supports textures. This will not work
  with the old Blue-Moon tools, but should work with Aqsis, 3Delight
  and Pixie, and probably with other RenderMan compliant shaders as
  well. To use texturing with the RenderMan snapshots produced by
  Geomview one needs to compile the texture aware RenderMan-shaders
  that come with Geomview; I have written shaders which emulate the
  OpenGL application methods GL_MODULATE, GL_DECAL, GL_BLEND and
  GL_REPLACE. Actually, GL_MODULATE is already implemented in the
  "paintedplastic" shader, but not for constant shading. The shaders
  are located in the "data/shaders/" directory.



Lloyd Wood 
http://savi.sf.net 






On Sunday, 17 May 2020, 11:46:52 GMT+10, Fabian Russell <fr3...@gm...> wrote: 





Hello,

There are configuration options for compiling geomview source code
that mention several shader compiler programs:

--with-aqsis-shader-compiler=PROGRAM
--with-pixie-shader-compiler=PROGRAM
--with-delight-shader-compiler=PROGRAM

Geomview doesn't seem to require any of these shaders to operate.
I have none of them on my system yet geomview runs just fine.

What is the purpose of these shader programs and how are they
supposed to be used?

I can find nothing in the geomview documentation about them.

FR


_______________________________________________
geomview-users mailing list
geo...@li...
https://lists.sourceforge.net/lists/listinfo/geomview-users

[geomview-users] Shader Compiler Programs?

[Fabian R. <fr3...@gm...>]

Hello,

There are configuration options for compiling geomview source code
that mention several shader compiler programs:

--with-aqsis-shader-compiler=PROGRAM
--with-pixie-shader-compiler=PROGRAM
--with-delight-shader-compiler=PROGRAM

Geomview doesn't seem to require any of these shaders to operate.
I have none of them on my system yet geomview runs just fine.

What is the purpose of these shader programs and how are they
supposed to be used?

I can find nothing in the geomview documentation about them.

FR

Re: [geomview-users] ZEFSA output oogl+off files crashing geomview 1.9.5

[mwdeem <mw...@ri...>]

Hi,

Not sure why the zefsa-produced file is crashing geomview.  These  
scripts were created back in the late 90s.  They worked back then....

If you let me know what if anything is wrong with the .off file, I can  
try to fix it.  Not loading and not producing the desired visual  
output is not a preferred fix.

Regards,
Michael
Quoting llo...@ya...:

> We have an odd test case of an oogl file loadingan off file and  
> promptly crashing geomview when loaded.(The files were generated by  
> Zefsa, a molecular structuregenerator using Geomview as a viewer.)
>
>
> Files and instructions how to reproduce this crash are at
> http://www.geomview.org/dev/geomview-zefsa-output-segfault.tar.gz
>
> The crash can be avoided by simply renaming the dodecahedron fileso  
> that it isn't loaded.
>
>
> I haven't gotten any further beyond creating this  
> reproductiontestcase and howto, and thinking that Geomview's  
> parsershouldn't crash on input, while zefsa shouldn't generate  
> outputthat crashes geomview...
>
>
> thanks to Jiang for reporting this. Further insights welcome.
>
> regards
>
>
> Lloyd Wood
> http://savi.sf.net/

[geomview-users] ZEFSA output oogl+off files crashing geomview 1.9.5

[<llo...@ya...>]

We have an odd test case of an oogl file loadingan off file and promptly crashing geomview when loaded.(The files were generated by Zefsa, a molecular structuregenerator using Geomview as a viewer.)


Files and instructions how to reproduce this crash are at
http://www.geomview.org/dev/geomview-zefsa-output-segfault.tar.gz

The crash can be avoided by simply renaming the dodecahedron fileso that it isn't loaded.


I haven't gotten any further beyond creating this reproductiontestcase and howto, and thinking that Geomview's parsershouldn't crash on input, while zefsa shouldn't generate outputthat crashes geomview...


thanks to Jiang for reporting this. Further insights welcome.

regards


Lloyd Wood 
http://savi.sf.net/

Re: [geomview-users] cone inscribed in sphere

[Larry P. <lp...@co...>]

On Sat, 13 Jul 2019 08:18:39 -0300
Jorge Barros de Abreu <fic...@gm...> wrote:

> 
> Is there a better way to make this message attachments (cone
> inscribed in sphere)???
> 
> Better way in sense of a file less than attachments.
> 

You can use the CenterStage module to easily create a cone
inscribed in a sphere and then export to OOGL.

The mailing list at slashdot does not allow large file attachments
and so I cannot attach the OOGL file.  But I have attached a JPEG image
snapshot of the OOGL file.

There is a color grading along the z-axis with the outer sphere
being 67% transparent. 

CenterStage is found here:

http://www.math.union.edu/software/StageTools/

I have also attached the CenterStage file that is used
to create the cone-in-sphere.  Both are described parametrically.

The CenterStage file is a script that could create any cone-in-sphere
at will.  There is no need for large file storage.

LP

Re: [geomview-users] cone inscribed in sphere

[Larry P. <lp...@co...>]

On Sat, 13 Jul 2019 08:18:39 -0300
Jorge Barros de Abreu <fic...@gm...> wrote:

> 
> Is there a better way to make this message attachments (cone
> inscribed in sphere)???
> 
> Better way in sense of a file less than attachments.
> 

You can use the CenterStage module to easily create a cone
inscribed in a sphere and then export to OOGL.

I have attached an OOGL file that can be loaded into geomview.

CenterStage is found here:

http://www.math.union.edu/software/StageTools/

I have also attached the CenterStage file that is used
to create the cone-in-sphere.  Both are described parametrically.

The CenterStage file is a script that could create any cone-in-sphere
at will.  There is no need for large file storage.

LP

Re: [geomview-users] cone inscribed in sphere

[<llo...@ya...>]

I should add, demonstration Geomview image showing sphere and cones:http://www.esa.int/spaceinimages/Images/2016/05/Mega_constellations
Lloyd Woodhttp://savi.sf.net/
 

    On Saturday, 13 July 2019, 21:35:32 GMT+10, lloyd.wood--- via geomview-users <geo...@li...> wrote:  
 
 Jorge,
The SaVi geomview add-on basically does nothing but drawspheres (the Earth) and cones (satellite coverage beams).That might give you some ideas. Not sure how you mightdeal with intersections for e.g. a Death Star.

take a look at the definitions of unit_sphere_h and cone_h inhttps://sourceforge.net/p/savi/savi-dev/HEAD/tree/oogl/savi.oogl
Lloyd Woodhttp://savi.sf.net
 

    On Saturday, 13 July 2019, 21:25:05 GMT+10, Jorge Barros de Abreu <fic...@gm...> wrote:  
 
 Hi for all.

Is there a better way to make this message attachments (cone inscribed in sphere)???

Better way in sense of a file less than attachments.

Thanks for your time.

-- 
Data Estelar 2458677,968519
http://sites.google.com/site/ficmatinf
Desejo-lhe Paz, Vida Longa e Prosperidade.
São Bem Vindas Mensagens no Formato texto UTF-8 com Acentos
  
  

Re: [geomview-users] cone inscribed in sphere

[<llo...@ya...>]

Jorge,
The SaVi geomview add-on basically does nothing but drawspheres (the Earth) and cones (satellite coverage beams).That might give you some ideas. Not sure how you mightdeal with intersections for e.g. a Death Star.

take a look at the definitions of unit_sphere_h and cone_h inhttps://sourceforge.net/p/savi/savi-dev/HEAD/tree/oogl/savi.oogl
Lloyd Woodhttp://savi.sf.net
 

    On Saturday, 13 July 2019, 21:25:05 GMT+10, Jorge Barros de Abreu <fic...@gm...> wrote:  
 
 Hi for all.

Is there a better way to make this message attachments (cone inscribed in sphere)???

Better way in sense of a file less than attachments.

Thanks for your time.

-- 
Data Estelar 2458677,968519
http://sites.google.com/site/ficmatinf
Desejo-lhe Paz, Vida Longa e Prosperidade.
São Bem Vindas Mensagens no Formato texto UTF-8 com Acentos
  

[geomview-users] cone inscribed in sphere

[Jorge B. de A. <fic...@gm...>]

Hi for all.

Is there a better way to make this message attachments (cone inscribed in sphere)???

Better way in sense of a file less than attachments.

Thanks for your time.

-- 
Data Estelar 2458677,968519
http://sites.google.com/site/ficmatinf
Desejo-lhe Paz, Vida Longa e Prosperidade.
São Bem Vindas Mensagens no Formato texto UTF-8 com Acentos.

Re: [geomview-users] SaVi segfaulting when writing to a geomview pipe?

[<llo...@ya...>]

Ah, thanks again.

It appears I shouldn't have been using the legacy -ansi flag (which I added in a belated fit of cleanup rigour for the SaVi 1.4 releases) but the clearer -std=c89 instead, which might have made slightly more retrospective sense given SaVi's origin in the mid-90s - but neither flag accounts for or allows the added POSIX library use.

Looking at compile warnings, -ansi seems to map to -std=c99 these days, but excludes POSIX? I'm not seeing that implicit build warning on my systems (gcc 7.4, 8.3, and Raspbian 4.9ish)

Not specifying -ansi or -std= means that what is not forbidden is allowed, and the POSIX is accepted by default without requiring another gcc flag, I think.

cheers

Lloyd Wood
http://savi.sf.net/




On Saturday, 15 June 2019, 22:48:24 GMT+10, Adrian Rossiter <ad...@an...> wrote: 





Hi Lloyd

On Sat, 15 Jun 2019, llo...@ya... wrote:
> #    DEBUGFLAGS = -Wall -Wextra -Wconversion -pedantic -ansi
>
> The -ansi flag caused SaVi to segfault on writing to the geomview pipe 
> with recent gcc, removing that flag fixed it. But why? gcc 7.3 or later

If you look at the build warnings you will see

gv_utils.c: In function ‘gv_stream_init_proc’:
gv_utils.c:93:11: warning: implicit declaration of function ‘fileno’; did 
you mean ‘fopen’? [-Wimplicit-function-declaration]
    fdout = fileno(stdout);
            ^~~~~~
            fopen

It appears that the solution is to define _POSIX_C_SOURCE, e.g.

    make CC="gcc  -Wall -Wextra -Wconversion -pedantic -ansi -D_POSIX_C_SOURCE" ARCH=ubuntu

The resulting binary then runs correctly.

See here for some explanation

    https://stackoverflow.com/questions/25759672/ansi-c-and-temporary-files


Adrian.
-- 
Adrian Rossiter
ad...@an...
http://antiprism.com/adrian

Re: [geomview-users] SaVi segfaulting when writing to a geomview pipe?

[Adrian R. <ad...@an...>]

Hi Lloyd

On Sat, 15 Jun 2019, llo...@ya... wrote:
> #    DEBUGFLAGS = -Wall -Wextra -Wconversion -pedantic -ansi
>
> The -ansi flag caused SaVi to segfault on writing to the geomview pipe 
> with recent gcc, removing that flag fixed it. But why? gcc 7.3 or later

If you look at the build warnings you will see

gv_utils.c: In function ‘gv_stream_init_proc’:
gv_utils.c:93:11: warning: implicit declaration of function ‘fileno’; did 
you mean ‘fopen’? [-Wimplicit-function-declaration]
    fdout = fileno(stdout);
            ^~~~~~
            fopen

It appears that the solution is to define _POSIX_C_SOURCE, e.g.

    make CC="gcc  -Wall -Wextra -Wconversion -pedantic -ansi -D_POSIX_C_SOURCE" ARCH=ubuntu

The resulting binary then runs correctly.

See here for some explanation

    https://stackoverflow.com/questions/25759672/ansi-c-and-temporary-files

Adrian.
-- 
Adrian Rossiter
ad...@an...
http://antiprism.com/adrian