[Dune] label/id mismatching when visualizing with vtkwriter and paraview (with that of grid files)

[Oliver Sander]

Hi Sreejith!
I don't know the internals of ALU Simplex Grid, but note that the
grid interface specification does not state that entities should
be indexed by order of their creation.

If you use UGGrid you can see the same effect.  UG wants to see the
boundary vertices before the inner vertices.  Therefore they get
the lower indices no matter what order they had in the file.
I find this annoying at times, but I haven't found an easy way
around it so far.  And again: it is specification-compliant.

Good luck,
Oliver

************************************************************************
* Oliver Sander                ** email: sander at mi.fu-berlin.de        *
* Freie Universität Berlin     ** phone: + 49 (30) 838 75217           *
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On Mon, 4 Sep 2006, Sreejith Pulloor Kuttanikkad wrote:

>
> Dear DUNEler,
>
> Why is that a grid file when visualising with vtkwriter and paraview
> gives different labels (for eg. ID's of vertices ) than the original
> ids from the grid file.
>
> Attached a sample 2d ALU simplex grid (2dgrid.ALU)
>
> from the grid file it is clear that vertex ID 2 is with coord (1,-1) but
> when visualizing with vtkwriter and paraview it shows ID as 5. there are
> many such mismatches of labels.
>
> since the labels are different it sometimes make confusion. I would like
> to know what the problem is?
>
> cheers,
> Sreejith
>
>
> -- 
> Sreejith P. Kuttanikkad
> IWR, University of Heidelberg
> Room:009, Im Neuenheimer Feld-348
> 69120 Heidelberg,Germany.
> Ph :+49-6221-54-5689/4412(Office)
>   :+49-(0)17624228904(Mob)
> http://hal.iwr.uni-heidelberg.de/~sreejith/
> -------------------------------------------
>