VMD-L Mailing List

From: Andrea Spitaleri (andrea.spitaleri_at_iit.it)
Date: Tue Apr 04 2017 - 05:04:45 CDT

Hi John,

could you kindly provide us a script example how to run
vmd_rendering_MPI on supercomputers?

Thanks

andrea

On 03/04/2017 16:45, John Stone wrote:
> Hi,
> Only the _external_ CPU Tachyon renderer can write the scene geometry to a
> ".dat" file. All of the "internal" Tachyon variants write images only, and
> they do not write (nor can they read) scene geometry to/from .dat files.
> You would normally use it like this (just one example):
> render TachyonLOptiXInternal /some/directory/my/image.tga
>
> The OptiX-based GPU-accelerated variant of Tachyon is not (presently)
> included in the standalone binary, so for the time being you cannot run
> it except from within VMD itself. That being said, you can of course
> run VMD in text mode for long batch mode renderings. This is in fact how
> we use VMD to render long movies in parallel on supercomputers, using the
> MPI-enabled versions of VMD.
>
> Cheers,
> John Stone
> vmd_at_ks.uiuc.edu
>
> On Mon, Apr 03, 2017 at 09:16:44AM +0000, Amit Gupta wrote:
>> Hi,
>> render list helped. Now i can render images using tk console command 'render TachyonLoptiXInternal filename'. However when i try getting .dat file it gives error:
>> Info) Rendering current scene to 'abc.dat' ...
>> ERROR) Unrecognized image file extension, writing Targa file.
>> while :
>> 'render Tachyon filename.dat' works perfectly.
>> Also can i not invoke OptiX rendering through shell? as in directly using /usr/local/lib/vmd/tachyon_LINUXAMD64 binary
>> ________________________________________
>> From: owner-vmd-l_at_ks.uiuc.edu <owner-vmd-l_at_ks.uiuc.edu> on behalf of Andrea Spitaleri <andrea.spitaleri_at_iit.it>
>> Sent: Monday, April 3, 2017 1:06:37 PM
>> To: vmd-l_at_ks.uiuc.edu
>> Subject: Re: vmd-l: Accessing tachyon optix from commandline and dat file generation
>>
>> Hi,
>>
>> in tk console try render list. It will give you back a list of render
>> available methods. Have look to here too:
>>
>> http://www.ks.uiuc.edu/Research/vmd/mailing_list/vmd-l/26535.html
>>
>> best
>>
>> and
>>
>>
>> On 03/04/2017 08:41, Amit Gupta wrote:
>>> 1. I want to get .dat file to generate images of arbitrary resolution. But in VMD (Linux) I can only see option for that in normal tachyon. i.e. TachyonL-Optix gives images directly. is there anyway to use Tachyon with GPU to generate .dat files? Using OSPray? I have seen VMD site claiming it can run on massively parallel supercomputers, is that done using only mpi?
>>>
>>> 2. How to tell tachyon to use optix renderer for generating images using GPU from command line? i.e. what is GPU equivalent of tachyon -res xxx yyy ?
>>>
>> --
>> Andrea Spitaleri PhD
>> Computational mOdelling of NanosCalE and bioPhysical sysTems - CONCEPT Lab
>> ISTITUTO ITALIANO DI TECNOLOGIA
>> Via Morego 30, 16163 - Genova, Italy
>> https://iit.it/research/lines/computational-modelling-of-nanoscale-and-biophysical-systems
>> cell: +39 3485188790
>> https://iit.it/andrea-spitaleri
>> ORCID: http://orcid.org/0000-0003-3012-3557
>> 

-- 
Andrea Spitaleri PhD
Computational mOdelling of NanosCalE and bioPhysical sysTems - CONCEPT Lab
ISTITUTO ITALIANO DI TECNOLOGIA
Via Morego 30, 16163 - Genova, Italy
https://iit.it/research/lines/computational-modelling-of-nanoscale-and-biophysical-systems
cell: +39 3485188790
https://iit.it/andrea-spitaleri
ORCID: http://orcid.org/0000-0003-3012-3557