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[guilhem <question646460@xxxxxxxxxxxxxxxxxxxxx>]

New question #646460 on Yade:
https://answers.launchpad.net/yade/+question/646460

Hi all,

I am trying to impose a translation of a cylinder in rotation to simulate powder crunching.

So i use two engines after bed stabilisation:

def checkUnbalanced():
   if O.iter<5000: return
   if unbalancedForce()>.1: return
   O.engines=O.engines[:4]+[RotationEngine(ids=roul,angularVelocity=0.,rotationAxis=(0,1,0),label="rotEngine")+TranslationEngine(ids=roul,translationAxis=(1,0,0),velocity=vitesse,label="transEngine")]+O.engines[4:] 
   checker.command='arret()' #on passe a la fonction arret de la racle

def arret():
   if O.time()>(2*dim_lo)/vitesse:
#      plate1.state.vel*=0
#      plate2.state.vel*=0
      transEngine.velocity=0

This logically not working because i need to define at each time step the new position of the rotational axis of the cylinder. The solution is to use in rotationnal engine options zeroPoint (rotateAroundZero=true). But the problem is that i can't call transEngine or rotEngine during simulation:

----> 1 transEngine

NameError: name 'transEngine' is not defined

Label seems not to be take into account??????


BR

Guilhem



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