[Dune] question about JacobianInverseTransposed

Aleksejs Fomins aleksejs.fomins at lspr.ch
Mon Aug 4 10:12:57 CEST 2014


Sure, I am sorry, I misclicked

On 08/04/2014 10:10 AM, Martin Nolte wrote:
> Hi Aleksejs,
> 
> could you please keep discussion on the mailing list?
> 
> Thanks,
> 
> Martin
> 
> On 08/04/2014 10:04 AM, Aleksejs Fomins wrote:
>> Hey, thanks :)
>>
>> I will take a look at AffineGeometry. However, I think I will have to
>> use MultilinearGeometry as a base for my CurvilinearGeometry because
>> that is how we agreed with Prof. Bastian
>>
>> On 08/04/2014 09:59 AM, Martin Nolte wrote:
>>> PS: Maybe the AffineGeometry is a better place to learn the
>>> implementation of a DUNE geometry, because it is slimmer. The
>>> MultiLinearGeometry is a quite complex construct with a few tweaks to
>>> gain performance. Some of them might not even be necessary with recent
>>> compilers. For example, some of the integral_constant magic could be
>>> removed if we rely on constant propagation. However, this would rely on
>>> people recognizing this opportunity and not "improving" it without
>>> thought.
>>>
>>> Best,
>>>
>>> Martin
>>>
>>> On 08/04/2014 09:48 AM, Aleksejs Fomins wrote:
>>>> Dear Dune,
>>>>
>>>> I would be happy if someone could explain me the initializer of the
>>>> MultilinearGeometry:
>>>>
>>>>
>>>> ---------------------------------------------------------------
>>>>
>>>>     typedef FieldMatrix< ctype, coorddimension, mydimension > Base;
>>>>
>>>>      public:
>>>>        void setup ( const JacobianTransposed &jt )
>>>>        {
>>>>          detInv_ = MatrixHelper::template rightInvA< mydimension,
>>>> coorddimension >( jt, static_cast< Base & >( *this ) );
>>>>        }
>>>>
>>>> ---------------------------------------------------------------
>>>>
>>>> Namely, I am not sure what does "static_cast< Base & >( *this )" do,
>>>> and
>>>> thus where the inverse of jt is stored?
>>>>
>>>> Thank you,
>>>> Aleksejs
>>>>
>>>>
>>>>
>>>> _______________________________________________
>>>> Dune mailing list
>>>> Dune at dune-project.org
>>>> http://lists.dune-project.org/mailman/listinfo/dune
>>>>
>>>
>>
> 

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