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[Chareyre <bruno.chareyre@xxxxxxxxxxxxxxx>]

>  But I saw that many Law2 are still in "GlobalEngine"
> So, what's the rule (if there is one ?)
>
>   
This is mostly for backward compatibility, you don't "have to" do the 
same. Looping in global engines is used less and less.
There are a few cases where global engines help a lot though, like using 
more than one constitutive laws in parallel (e.g. elastic+capillary).

Bruno

-- 
r2274 trunk is broken
https://bugs.launchpad.net/bugs/589516
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Status in Yet Another Dynamic Engine: Fix Released

Bug description:
Hi, Jerome,

please, fix it:

from /home/anton/dem/yade/current/build-current/plugins25.cpp:1:
/usr/include/boost/smart_ptr/shared_ptr.hpp: In constructor 'boost::shared_ptr< <template-parameter-1-1> >::shared_ptr(const boost::shared_ptr<Y>&, boost::detail::static_cast_tag) [with Y = Engine, T = Law2_ScGeom_NormalInelasticityPhys_NormalInelasticity]':
/usr/include/boost/smart_ptr/shared_ptr.hpp:512:   instantiated from 'boost::shared_ptr<X> boost::static_pointer_cast(const boost::shared_ptr<U>&) [with T = Law2_ScGeom_NormalInelasticityPhys_NormalInelasticity, U = Engine]'
/home/anton/dem/yade/current/yade/pkg/dem/Engine/PartialEngine/KinemCNSEngine.cpp:137:   instantiated from here
/usr/include/boost/smart_ptr/shared_ptr.hpp:249: error: invalid static_cast from type 'Engine* const' to type 'Law2_ScGeom_NormalInelasticityPhys_NormalInelasticity*'
scons: *** [/home/anton/dem/yade/current/build-current/plugins25.os] Error 1
scons: building terminated because of errors.

Thank you