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[xjin <question403695@xxxxxxxxxxxxxxxxxxxxx>]

New question #403695 on Yade:
https://answers.launchpad.net/yade/+question/403695

I am trying to model a rigid body consisted by particles which are clumped. And when I try to use RotationEngine to make it rotate, I get a problem.
The script is like this:

bodylist=[]
bodylist.append(O.bodies.append(sphere([0,0,0],1)))
for ix in range(0,10):
bodylist.append(O.bodies.append(sphere([0.5+ix,0,0],0.5)))
bodylist.append(O.bodies.append(sphere([-0.5-ix,0,0],0.5)))

for iy in range(0,10):
bodylist.append(O.bodies.append(sphere([0,0.5+iy,0],0.5)))
bodylist.append(O.bodies.append(sphere([0,-0.5-iy,0],0.5))) 

idclump=O.bodies.clump(bodylist)
q=O.bodies[len(O.bodies)-1]

globals()['q']=locals()['q']
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()]
),   
NewtonIntegrator(gravity=(0,0,-9.8),damping=0.4),
RotationEngine(ids=q.id,
angularVelocity=1,
rotationAxis=(1,1,0),
rotateAroundZero=1,
zeroPoint=(1,1,1))
]
O.dt=0.05*PWaveTimeStep()



When I type the script, the termination notice me a problem before the O.dt.
 It tells me that :

---------------------------------------------------------------------------
TypeError                                 Traceback (most recent call last)
/home/dj/yade/install/bin/yade in <module>()
     12 rotationAxis=(1,1,0),
     13 rotateAroundZero=1,
---> 14 zeroPoint=(1,1,1))
     15 ]

TypeError: No registered converter was able to produce a C++ rvalue of type std::vector<int, std::allocator<int> > from this Python object of type int


I type it following the information in your website, and I try some ways but all failed.Can you tell me how to use RotationEngine correctly?
Thanks for any suggestions
xjin

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