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[Anton Gladky <question140414@xxxxxxxxxxxxxxxxxxxxx>]

Question #140414 on Yade changed:
https://answers.launchpad.net/yade/+question/140414

    Status: Open => Answered

Anton Gladky proposed the following answer:
Hi,

For facets moving you should use TranslationEngine. In "engines"
section you should add something like:
TranslationEngine(translationAxis=[0,0,1],velocity=1.0,ids=[0,1])

Facets can not by "dynamic", because they do not have mass.

What yade version do you use? Could you not, please, file a bug on
"stopping simulation"?

Thanks
Anton



On Thu, Jan 6, 2011 at 4:49 PM, Tao
<question140414@xxxxxxxxxxxxxxxxxxxxx> wrote:
> New question #140414 on Yade:
> https://answers.launchpad.net/yade/+question/140414
>
> Hi all,
> I try to move facetBox in my program to simulate the compacting process of retaining wall and some errors occur during my simulation. I just cannot add velocity to facetBox even though its dynamic property is "True"!!
> Here is the code I used to create a facetBox and set its velocity:
>
> O.bodies.append(utils.facetBox(center=(a,0,h),extents=(0,b,h),orientation=Quaternion((-1,0,0),0),wallMask=1,wire=True,dynamic=True,material='steel',color=(0,1,1)))
> O.bodies[0].state.vel=(0,0,1)
> O.bodies[1].state.vel=(0,0,1)
>
> I know if I create a facetBox, it contents two small triangle facets just as I set the velocity to facet 0 and 1. However, this kind of resort would lead to a error: "segmentation fault". Thus, I do not know how to fix it.  Does anyone know how to set velocity to a  facetBox, or is there other means to create walls which can be moved during simulation?
>
> PS: if I change the dynamic property of facetBox as "True" during the simulation, the simulation will automatically stop. I do not know why.
>
> Thanks!
>
> Tao
>
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