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[Fu zuoguang <question268448@xxxxxxxxxxxxxxxxxxxxx>]

Question #268448 on Yade changed:
https://answers.launchpad.net/yade/+question/268448

Description changed to:
Dear Prof. Chareyre and all users,

In a special state, the results of resultant forces and moments 
of all bodies in simulation need to be output as well as those of 
all contacts. But now I failed to do this with the classes of
'ForceRecorder' and 'TorqueRecorder' in the following style:

for b in O.bodies:
    O.engines.Recorder.ForceRecorder[body_id = b].totalForce
    O.engines.Recorder.TorqueRecorder[body_id = b].totalTorque

My questions are that

(1) Do I get the right classes for my purpose ?
(2) If yes, how to access the classes of 'ForceRecorder' and 'TorqueRecorder'
from 'O.engines' (the above sentences exsit errors) with the given body_id ?

Best regards
Zuoguang Fu

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