[Paraview] dataset questions

[SamuelKey]

Juan,

For what it is worth here is my 2 centavos,

First, I would consider the VTK XML data format.

Second, I have found that it works really well to consider each *.vt* 
file as an independently displayable graphics object. One then uses a 
*.pvd meta-file (an ASCII "mother" file) to get PV to read them all at once.

Parallel generated data sets are managed this way. I use this approach 
to generate separate objects based on material type. PV does not care 
(or know) that they were not generated in parallel. As independently 
displayable graphics objects, they need to have their own point sets. PV 
doesn't worry about one or more points having "matching" locations.

Each object has its own set of iso-surfaces so that on boundaries the 
data from each side is used and you get disconnected iso-surfaces which 
in my case is exactly what I want.

The question of different fields/data on different objects someone else 
will need to answer. (You can always flesh out zero's.)

Sam Key

John Doe wrote:
> I was going to use implement a vtk writer for my program.  I would
> like to use the vtk ascii datafile format.  A few questions:
> 
> 1. I have multiple regions.  Some of these regions share coordinates
> at an interface.  Do I have to average the data on both sides of the
> interface, or is there a way to put 2 values at the same point?  Will
> paraview complain about duplicate coordinates (collinear points)?
> 
> 2. Some data fields only exist in certain regions.  Does that mean I
> have to set 0 values in the regions the field does not exist?
> 
> 3. I have points, lines, and triangles.  If I put data on lines, does
> that mean I have to define the same data fields on all of the other
> cell types in my design as well?  For example, I have current flowing
> along lines, but not through triangles.  So it wouldn't make sense to
> have current data defined for the triangles.
> 
> Thanks,
> 
> Juan
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