yade-users team mailing list archive

[Emanuele Catalano <catalano@xxxxxxxxxxx>]

Hello Viet Tran,
if you actually have an .xml file with your simulation, the best thing 
to do is to use python scripting, to load the simulation and add what 
you need to make videos.

For example, if you launch ./YADE-0.50.1 from the terminal, you can type 
from the Yade prompt:
Yade [1]: O.load('yoursimulation.xml') #to load your simulation
Yade [2]: O.engines = O.engines + 
[qt.SnapshotEngine(iterPeriod=100,fileBase='./video-',label='snapshooter')] 
#to add the snapshot engine. This will save snapshots in .png format 
every 'iterPeriod' iterations (100 in this case).

Then push F10 to open the Controller and the 3DView, push the Play 
button and run as many iterations you need.
Stop the simulation when it is ok and again in the yade prompt type:

Yade [3]: utils.makeVideo('./*.png', 'video.avi', 
renameNotOverwrite=True, fps=6, kbps=6000, bps=None) #to create the 
video from the .png files

In general I recommend you to use python scripting to generate your 
simulations as long as you don't need to personalize the mechanics of 
your simulation with your own contact law for example!

HTH, Emanuele





On 08/26/2011 06:29 AM, Viet Tran wrote:
> Hello,
>
> I know it may not be a good question, but can someone help me with 
> video recording? I'm using YADE-0.50.1 and I have written my own codes 
> with a Preprocessor file and run the simulation by the created .xml 
> file. I learn that we can create the videos of our simulations in 
> Python, but I think we can also do it by writting some lines of code 
> in the preprocessor file (ex: in the Triaxial test.cpp), my problem is 
> that I do not know how to do it :((
>
> I'm very appreciated if you can give me some guidance.
>
> Thanks
>
> Viet Tran
>
>
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--
Emanuele Catalano
Doctorant - Laboratoire Sol, Solides, Structures et Risques
Institut polytechnique de Grenoble

Tel : 04 56 52 86 49