Question #696150 on Yade changed:
https://answers.launchpad.net/yade/+question/696150
Status: Open => Answered
Karol Brzezinski proposed the following answer:
Hi,
I tried to run your code and I couldn't save the file at al (Ubuntu
20.04 Yade 2020.01a )l, due to the CGAL ERROR: assertion violation.
Unfortunately, I don't know how to fix this issue, but I have some comments:
- You set something like "O.bodies[i].state.dynamics = False", I think it
should be "O.bodies[i].dynamic = False" as in the example [1]
(BTW I noticed that Body.dict() doesn't show the "dynamic" value. I thought it
should.)
- I am not sure, but I think that periodic boundaries may be problematic.
Hypothetically: If the particle in state 0 is on the right edge and moves right
it will appear on the left side (state 1). If the displacements are calculated
based on positions (I am not sure about implementation) the result will be
peculiar.
- If your only problem is excluding some bodies from tesselation you could save
positions from state 0 and 1 only for desired bodies in external files and then
compute deformations using those files instead of states
(defToVtkFromPositions() instead of defToVtk() [2])
Best wishes,
Karol
[1] https://yade-dem.org/doc/user.html#motion-constraints
[2]
https://yade-dem.org/doc/yade.wrapper.html?highlight=tesselationwrapper#yade.wrapper.TesselationWrapper.defToVtkFromPositions
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