[dune-functions] Problems writing vector-valued vtk files

[Carsten Gräser]

Am 18.03.2015 um 22:14 schrieb Christian Engwer:
> This would become easier when introducing tensors ;-)
Perhaps. However I still think that the user will have
to decide in the nontrivial cases.

Carsten

> Christian
> 
> On Wed, Mar 18, 2015 at 04:18:30PM +0100, Carsten Gräser wrote:
>> Am 18.03.2015 um 16:13 schrieb Oliver Sander:
>>>>> One could argue that it is called ...scalar... because it uses scalar bases,
>>>>> even to create vector-valued functions.  I'm not perfectly sure that this is
>>>>> a good long-term point of view.
>>>> In the long-term we should get rid of 'scalar'. The only thing
>>>> to specify is how to multiply coefficients and values of the local
>>>> basis. Maybe we can factor this out in a first step such that one
>>>> can povide this as a lambda.
>>>
>>> I've been thinking along the same lines.  Getting rid of the 'scalar' would be nice;
>>> the users shouldn't have to worry about scalar and nonscalar bases too much.
>> I'm afraid he has to. Because if coefficients and basis functions are
>> vector-valued, there's no longer a canonical range type for the
>> function. It get's even worse, for matrix valued coefficents.
>>
>> Best,
>> Carsten
>>
>>>
>>>>
>>>> For the moment I've implemented support for vector/matrix-valued
>>>> coefficients only.
>>>
>>> Works-for-me, thanks!
>>>
>>>>
>>>> Best,
>>>> Carsten
>>>>
>>>> BTW:
>>>> Generic multiplication of various matrix/vector/scalar
>>>> combinations is something we've put a significant amount of
>>>> work into in dune-fufem.