yade-dev team mailing list archive

[Chareyre <850864@xxxxxxxxxxxxxxxxxx>]

I agree Anton. The question is how to fix that?
It needs knowledge of facets connectivity I think, the same kind of problems I got to tackle for chained cylinder. It is not quite well supported by design.

In the cylinder-sphere case, interactions have additional data (e.g. an
additional id3) and the connectivity  of cylinders is stored in static
members of the class ChainedCylinder.
(https://blueprints.launchpad.net/yade/+spec/chained-bodies)

Another way would be to define a collection of facet as a unique body to
make sure there is only one contact (the problem is there can be
multiple contacts on concave shapes...). It would need to assign
multiple bboxes to a single body, too.

Can you imagine simpler fix?

Any thought on this question can be usefull since we (in Grenoble) want
to implement deformable membranes on this basis one day.

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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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