yade-dev team mailing list archive

[Václav Šmilauer <eudoxos@xxxxxxxx>]

> As far as I know, all forces reset to 0 at each step. And at each step
> they acre calculated again.
Forces themselves (Scene->forces) are really reset, but we keep force of
the interaction in NormPhys::normalForce and shear force in
NormShearPhys::shearForce. The functor is responsible of filling those
values at every step.

We don't same any more history, in that case you would need to derive
*Phys (e.g. MindlinPhys) from NormShearPhys and store it in there.

HTH, v


> 
> So if you need the previous value of the force, you chould save it
> somewhere.
> ______________________________
> [ENG] Best Regards
> [GER] Mit freundlichen Grüßen
> [RUS] С наилучшими пожеланиями
> [UKR] З найкращими побажаннями
> 
> Anton Gladkyy
> 
> 
> 2010/1/31 Chiara Modenese <chiara.modenese@xxxxxxxxx>
>         Hi Vaclav,
>         
>         I am trying to implement the Mindlin's formulation for the
>         stiffnesses. One question: do we maintain the history of the
>         normalForce for each iteration for a specific interaction?
>         Cause I actually need to update the value of the stiffnesses
>         according to the value of the normal force..
>         Sorry but I am still in a learning stage of c++..
>         
>         Cheeers, Chiara
>         
>         
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