[Dune] [#1004] Make VTKFunctionPtr a const-pointer

[Benedikt Oswald]

Dear Dune,

although related to the VTK writer, perhaps my comment is somewhat off-topic.

I observe, when using a virtual resampling of the solution with the VTK subsampling functionality
that I 'lose' certain parts of the solution, specifically when using subsampling level = 2.

I have attached an example, in much compressed form as jpg.
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In the case of subsampling level = 1, there is no such problem.

It would be nice to have a look at this problem as well, in case you plan to modify
the VTK writer functionality anyway.

Have a great day! Benedikt


On Jan 24, 2012, at 3:04 PM, Dune wrote:

> THIS IS AN AUTOMATED MESSAGE, DO NOT REPLY.
> 
> The following task has a new comment added:
> 
> FS#1004 - Make VTKFunctionPtr a const-pointer
> User who did this - Jö Fahlke (joe)
> 
> ----------
> I see only one implication, potentially: In the future, we won't be able to introduce a VTK-writer that calls non-const methods on the VTKFunctions.  However, I don't think that is an issue, since all the overridable virtual functions of the VTKFunction base class (ncomps(), evaluate(), name()) are declared const anyway.
> 
> The other thing I was wondering is whether deep down in the VTKWriter, something still relies on the VTKFunction beeing mutable (you never know...).  This is apparently not the case, since both code with the VTKSequenceWriter and the SubsamplingVTKWriter compiles.
> 
> Do you see anything else that could go awry?
> ----------
> 
> More information can be found at the following URL:
> http://www.dune-project.org/flyspray/index.php?do=details&task_id=1004#comment3101
> 
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Benedikt Oswald, Dr. sc. techn., dipl. El. Ing. ETH, www.psi.ch, Computational Accelerator Scientist, http://amas.web.psi.ch
Paul Scherrer  Institute (PSI), CH-5232 Villigen, Suisse, benedikt.oswald at psi.ch, +41(0)56 310 32 12

"Passion is required for any great work, and for the revolution passion and audacity are required in big doses.",
 Ernesto 'Che' Guevara, Letter to his parents.
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