2016-06-16 10:28 GMT+02:00 Bruno Chareyre <[email protected]>:
> > > On 06/16/2016 09:22 AM, François wrote: > > > - GridNodes have no bounding-box, we can't expect them to interact > > Or, maybe, we could exploit the collision detection between connexions and > boxes to instantiate the node-box interactions (practically sphere-box > interactions). > Yes, but this way you will have a weird behaviour (double contacts) in the case of a neary parallel connexion-box. In the actual gridCo-gridCo-Geom implementation, you will never have a double contact between two cylinders, and if they are exactly parallel the special case is handeled here : https://github.com/yade/trunk/blob/6d4a0d1689c6bad2dbdd6e27d1653418f7fc6498/pkg/common/Grid.cpp#L157 > - GridConnections interactions need specific law2, because they dispatch > the force on the nodes. For this reason, and similarly to the first issue > above, the wall will feel the cylinders, but the cylinders will not feel > the walls. > > Not very clear to me. There is a functor which applies the interaction > force unilateraly on one single body? > This is because cylinders follow the nodes at each timestep, regardless of the force they receive : https://github.com/yade/trunk/blob/6d4a0d1689c6bad2dbdd6e27d1653418f7fc6498/pkg/common/Grid.cpp#L70 Cylinders are a kind of virtual elements, as each time we need geometric infos from them, we use the nodes instead. It starts with the aaBB : https://github.com/yade/trunk/blob/6d4a0d1689c6bad2dbdd6e27d1653418f7fc6498/pkg/common/Grid.cpp#L624 and the same method is used in the Ig2 then in the law, to get the two nodes ids and dispatch the force. Bruno > _______________________________________________ > Mailing list: https://launchpad.net/~yade-dev > Post to : [email protected] > Unsubscribe : https://launchpad.net/~yade-dev > More help : https://help.launchpad.net/ListHelp > >
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