yade-users team mailing list archive

[Jérôme Duriez <question648215@xxxxxxxxxxxxxxxxxxxxx>]

Question #648215 on Yade changed:
https://answers.launchpad.net/yade/+question/648215

    Status: Open => Answered

Jérôme Duriez proposed the following answer:
Hi,

For such a task, you first need to define for each corresponding particle "b" :
b.state.blockedDOFs = 'XYZ' (see [1])

so that you can control directly these angular velocities instead of
them being affected by resulting torques (if I understood correctly what
you want to achieve)

Then, I think you just have to include some PyRunner [2] engine in your engine list (at the end of O.engines, typically) defined as
O.engines = [..........., PyRunner(iterPeriod = 1,command = 'trickRotation()')]

with this trickRotation() Python function defined elsewhere as

def trickRotation():
    for b in theListOfParticlesYouWantToPlayWith:
          b.state.angVel = 0.99 * b.state.angVel # that's all you need to do to update this velocity !

Jerome


[1] https://yade-dem.org/doc/yade.wrapper.html#yade.wrapper.State.blockedDOFs
[2] https://yade-dem.org/doc/yade.wrapper.html#yade.wrapper.PyRunner

-- 
You received this question notification because your team yade-users is
an answer contact for Yade.