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Re: [Question #683851]: contact detection between polyhedra and sphere

 

Question #683851 on Yade changed:
https://answers.launchpad.net/yade/+question/683851

    Status: Open => Answered

Jan Stránský proposed the following answer:
> Can you atleast please give references for which Yade implemented the
contact detection from?

no :-) there is no reference, I just did something very simple to make it work.
- on polyhedron, find closes point ("closest") to the sphere's center ("center").
- then follow [1] to compute normal, penetrationDepth, contactPoint.

> in general

it is too general question :-) you can e.g.:
- use the current idea (see above)
- use the current idea, somehow enhanced (evaluate differently vertex/edge/face cases)
- do the same as polyhedron-polyhedron contact does, i.e. compute overlapping solid and use it for further computations (of contact point, normal direction etc.)
- surely something else..

cheers
Jan

[1]
https://github.com/yade/trunk/blob/master/pkg/dem/Polyhedra_Ig2.cpp#L436

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