[Paraview] Non parallel filters under MPI

[Jorge Peña]

Basically, I select a pixel on a grayscale vtkImage and then return a binary 
image with all pixels that are connected to the selected one as foreground 
pixels (black color) and the rest as background pixel (white color). The 
problem is, because the grid is partitioned across multiple processes, the 
selected pixel is only in one of the partitioned grids (I could just run the 
algorithm if the pixel is inside those grids) but connectivity could continue 
across other partitions.

I hope now it's a bit clearer. Anyway, thanks for answering.

On Martes, 24 de Mayo de 2011 16:03:30 Andy Bauer escribió:
> It's difficult to figure out what you're trying to do as I'm not sure what
> a seed connectivity filter should do.  Is the algorithm dependent on the
> input grid?  In general the grid will be partitioned across multiple
> processes.
> 
> Andy
> 
> 2011/5/24 Jorge Gerardo Peña Pastor <jorge.pena.pastor at gmail.com>
> 
> > Hi,
> > 
> > I'm working on a seed connectivity filter for Paraview. It works as
> > expected when executed with only one server node. Nevertheless, when I
> > try to execute it in several nodes with mpi + pvserver, it doesn't
> > work any more because it tries to access the seed pixel in all the
> > pieces, and thus it is out of their extents. In addition, the
> > algorithm won't work if applied in sub-samples.
> > 
> > How can I force the filter to be executed in a single node even if run
> > under mpi?
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