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Message #08144
[Bug 850864] Re: strange facet-sphere behaviour
Hi guys,
have a look at the attached script. There is for sure a problem when
spheres collide with facets. However, the behaviour is very strange and
the problem does not appear always. If you have a look at the plot of
the script you will see that the problem appears at the fourth
collision. Actually I tried to play as well with the damping coefficient
and the time step and for some configurations there is no problem (e.g.
use dc=0.1).
In addition you can change the parameters in the script and you can see
that the behaviour is very strange if the sphere collides with corners
as well (e.g. use b=0, change z...).
Well, this is very strange, any comments? And regarding this bug, I
think we should change the priority and fix it is asap.
Cheers
Klaus
** Attachment added: "Example witch shows strange behaviour"
https://bugs.launchpad.net/yade/+bug/850864/+attachment/2622507/+files/freefall.py
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https://bugs.launchpad.net/bugs/850864
Title:
strange facet-sphere behaviour
Status in Yet Another Dynamic Engine:
Confirmed
Bug description:
See https://answers.launchpad.net/yade/+question/171223
Spheres that are exactly on an edge between facets behave strangely.
Maybe related to other (closed, but never solved) bugs in sphere-
facet.
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References