[vtk-developers] AMR warning message

[Burlen Loring]

Hi John

The warning is about a condition that is typically bad for AMR codes. 
You want coarsen and refine to be inverse operations if you operate on 
some AMR box you want to apply the inverse and op get back what you 
started with. When this isn't the case the coarsened grid won't cover 
the original and In PV you'll have two level's cells visible in the same 
location.  For the most part PV ignores the visibility arrays, and I 
suspect that is why you don't see any changes. I am wondering if your 
Box definition includes any ghost cells? If your image data contains 
ghost cells, the box definitions shouldn't include the ghosts. Over the 
next month or so we will be implementing some of the missing AMR 
functionality as part of our co-processing SBIR. So hopefully we can get 
these issues resolved in a timely manner.

Burlen



John Biddiscombe wrote:
> I am receiving this message
>
> Generic Warning: In 
> ..\..\..\..\Code\CSCS\pv-meshless\VTK\Filtering\vtkAMRBox.cxx, line 625
>
> This box cannot be coarsened.
>
>
> when I call CreateVisibilityArrays on construction of an AMR 
> Heirarchical box dataset. I never used to receive the warning and the 
> code appears to still work the same.
>
>
> Should I be worried?
>
>
> Thanks
>
>
> JB
>
>
> -- 
> John Biddiscombe,                            email:biddisco @ cscs.ch
> http://www.cscs.ch/
> CSCS, Swiss National Supercomputing Centre  | Tel:  +41 (91) 610.82.07
> Via Cantonale, 6928 Manno, Switzerland      | Fax:  +41 (91) 610.82.82
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