yade-users team mailing list archive

[Jan Stránský <question403752@xxxxxxxxxxxxxxxxxxxxx>]

Question #403752 on Yade changed:
https://answers.launchpad.net/yade/+question/403752

    Status: Open => Answered

Jan Stránský proposed the following answer:
Hello,
have a look at [1], RotationEngine's position has to be before
NewtonIntegrator.
See [2] for the problem with fixed zeroPoint
cheers
Jan

[1] https://yade-dem.org/doc/user.html#base-engines
[2] https://answers.launchpad.net/yade/+question/403708


2016-11-03 10:47 GMT+01:00 xjin <question403752@xxxxxxxxxxxxxxxxxxxxx>:

> New question #403752 on Yade:
> https://answers.launchpad.net/yade/+question/403752
>
> I model two facets and a sphere, and I hope to make all of them translate
> in a fixed directiona and at a fixed translation speed. Meanwhile,the
> facets rotate around the sphere in the process of translation.
> The script is listed below. When I run it,I find that the facets rotate
> around their centroids respectively. It is not that the facets rotate
> around the sphere.
> Can someone give me any suggestion or the reason?
>
>
>
>
> O.bodies.append(sphere([0,0,0],0.5))
> iq=O.bodies[-1]
> iq.state.blockedDOFs='XYZxyz'
>
> O.bodies.append(facet([(0,1,0),(1,1,0),(1,2,0)]))
> O.bodies.append(facet([(0,1,0),(0,2,0),(1,2,0)]))
> for q in O.bodies:
> iq.state.blockedDOFs='XYZxyz'
>
> def sss():
> for q in O.bodies:
> q.state.vel=(0,0,1)
>
> globals()['sss']=locals()['sss']
> O.engines=[
>    ForceResetter(),
>    InsertionSortCollider([Bo1_Sphere_Aabb(),Bo1_Facet_Aabb()]),
>    InteractionLoop(
>       [Ig2_Sphere_Sphere_L3Geom(),Ig2_Facet_Sphere_L3Geom()],
>       [Ip2_FrictMat_FrictMat_FrictPhys()],
>       [Law2_L3Geom_FrictPhys_ElPerfPl()]
>    ),
> PyRunner(iterPeriod=1,command='sss()'),
> NewtonIntegrator(gravity=(0,0,0),damping=0.4),
> RotationEngine(ids=[1,2],angularVelocity=1,rotationAxis=(1,0,0),
> rotateAroundZero=1,zeroPoint=O.bodies[0].state.pos),
> ]
> O.dt=0.005*PWaveTimeStep()
>
>
>
>
> Thanks for any suggestions
>  xjin
>
> --
> You received this question notification because your team yade-users is
> an answer contact for Yade.
>
> _______________________________________________
> Mailing list: https://launchpad.net/~yade-users
> Post to     : yade-users@xxxxxxxxxxxxxxxxxxx
> Unsubscribe : https://launchpad.net/~yade-users
> More help   : https://help.launchpad.net/ListHelp
>

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