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[Jan Stránský <question689407@xxxxxxxxxxxxxxxxxxxxx>]

Question #689407 on Yade changed:
https://answers.launchpad.net/yade/+question/689407

    Status: Open => Answered

Jan Stránský proposed the following answer:
> Do you have any idea how to stop top box?

See answer #1 
>> To make the box step, just assign it zero velocity:
>> top.state.vel = Vector3.Zero

> I want compaction ... at ... stage which volume equal to 1.0*1.0*1.0.
How to do it ?

use e.g. PyRunner:
###
O.engines = [
   ...
   PyRunner(iterPeriod=1,command="stopBoxIfCompacted()")
]
def stopBoxIfCompacted():
   area = ...
   height = ...
   volume = area * height
   if volume < 1.0*1.0*1.0:
      top.state.vel = Vector3.Zero
      O.pause() # ?
###

cheers
Jan

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