yade-dev team mailing list archive

[boon chiaweng <booncw@xxxxxxxxxxx>]

Thanks Vaclav :) for the wonderful explanation.

 


 
> From: eudoxos@xxxxxxxx
> To: yade-dev@xxxxxxxxxxxxxxxxxxx
> Date: Tue, 1 Dec 2009 23:34:39 +0100
> Subject: Re: [Yade-dev] Help with changes
> 
> > Q1. Also, I noticed InteractionSolver is gone. It used to come
> > together with Constitutive Law. The former uses the
> > "action(*Metabody)" to invoke "go(IG &, IP&, etc.)" of the
> > constitutiveLaw. How is it done now?
> 
> ConstitutiveLawDispatcher invokes go(IG&,IP&) of individual
> ConstitutiveLaw's (note that ConstitutiveLawDispatcher might be hidden
> inside InteractionDispatchers, but functionally it is the same)
> 
> InteractionSolver was just empty class to designate such classes that
> were looping over all interactions. This approach was removed, since it
> forced all interactions to have same types.
> 
> > Q2. When do I use CreateIndex()? It is different from
> > RegisterAttributes() right?
> 
> createIndex(): Just for types that appear in the dispatch logic,
> currently: BoundingVolume, Material, InteractingGeometry,
> InteractionGeometry, InteractionPhysics.
> 
> The dispatcher uses the indices to decide which functor should be
> called. Depending on whether it decides based on 1 type or combination
> of 2 types, it is then Dispatcher1D or Dispatcher2D (and
> Functor1D/Functor2D). Each functor declares what types it accepts with
> FUNCTOR1D(type1) or FUNCTOR2D(type1,type2) macro. It is like virtual
> functions, but works for combination of types and can be changed at
> runtime: you can have multiple Ip2_* functors in yade that take
> GranularMat for instance, but only the one the dispatcher is given by
> the user will be used. You can see that nicely in all the python
> scripts.
> 
> REGISTER_ATTRIBUTES declares which attributes are saved to xml and also
> which are accessible from python with the ['attr'] notation (it is a
> rather convoluted macro)
> 
> > Sometimes, I just copy-paste and modify but don't really understand
> > what's going on..
> Try to do your best to understand. Of course it is a gradual process,
> but it will make your code much better.
> 
> Cheers, Vaclav
> 
> 
> 
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