yade-dev team mailing list archive

[Chareyre <850864@xxxxxxxxxxxxxxxxxx>]

Thanks Klaus,
I think the reason for this behaviour is relatively clear: if the contact is exactly on an edge, numerical noise will decide if there is a contact with one or two facets, and it can change randomly during the impact, hence giving unexpectedly high bouncing.

The problem is it is not an easy thing to fix in the current facet
implementation. The only way I can see is to implement chained facets
like there are chained cylinders, defining the connectivity of facets
with the possibility to track interactions moving from one facet to the
other. We can change the priority of the bug but more important is the
manpower for such implementation. Any volunteer?

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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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