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[Jan Stránský <question268448@xxxxxxxxxxxxxxxxxxxxx>]

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

    Status: Open => Answered

Jan Stránský proposed the following answer:
Hello Fu,

whenever you get an error, please input it to the question. Also try to
understand it. I guess, that there another problem than body_id:

1) ...[body_id=b] is not valid Python syntax
2) O.engines is list, so O.engines.Recorder makes no sense..

cheers
Jan


2015-06-23 6:11 GMT+02:00 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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