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[Huihuang Xia <question648734@xxxxxxxxxxxxxxxxxxxxx>]

New question #648734 on Yade:
https://answers.launchpad.net/yade/+question/648734

Hi,

I intend to move a facetSphere  and get its velocity when it interacts with other elements in my simulation. But to my disappointment, its velocity keeps constant.

I have tried to read its source code, and got that facetSphere have a default  -- fixed=True. Consequently, I modify this 'fixed=True' to 'fixed=False', but the facetSphere disappears. 

Besides, I have also tried another method. As facetSphere is fixed, its blockedDOFs = 'xyzXYZ' . Thus, I try to modify this one to "blockedDOFs = 'xzXZ'" (because I intend to get the velocity of facetSphere in y axis). But the facetSphere also disappears in my simulation.

Can you give me a hint or solution?

Thanks in advance,
Huihuang

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