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[Jan Stránský <question265693@xxxxxxxxxxxxxxxxxxxxx>]

Question #265693 on Yade changed:
https://answers.launchpad.net/yade/+question/265693

Jan Stránský proposed the following answer:
>
>
> could it be done using pyRunner somehow? To call function
> changeMaterial(), run for 50 iters, call changeMaterialBack() and continue
> untill pyRunner calls function again.
>

sure:

def changeMaterial():
   if O.iter % 1050 != 1000: return # do nothing at wrong iterations
   ...

def changeMaterialBack():
   if O.iter % 1050 != 0: return # do nothing at wrong iterations
   ...

O.engines = [
   ...
   PyRunner(iterPeriod=1,command="changeMaterial()", # iterPeriod is 1, but
the function itself determine if something needs to be done
   PyRunner(iterPeriod=1,command="changeMaterialBack()", # iterPeriod is 1,
but the function itself determine if something needs to be done
   ...
]


> I forgot to mention that I used similar approach, but my problem is that I
> don’t know  for how long my simulation is going to run, since I need to
> iterate until stop criterion isn’t met.
>

instead for loop you can use while loop:

while not someStopCondition():
   O.run(1000,True)
   changeMaterial()
   O.run(50,True)
   changeMaterialBack()

cheers
Jan

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