[MOAB-dev] MOAB insights?

[Grindeanu, Iulian R.]

Hi Nico,

Thanks for your help with debian support
Please see below

________________________________
From: moab-dev-bounces at mcs.anl.gov [moab-dev-bounces at mcs.anl.gov] on behalf of Nico Schlömer [nico.schloemer at gmail.com]
Sent: Thursday, October 29, 2015 8:16 AM
To: moab-dev at mcs.anl.gov
Subject: [MOAB-dev] MOAB insights?

Hi everyone,

I'm about to consider switching a larger application of mine over from STK (which I'm very unhappy with) to MOAB (the development experience of which has been great).

What  stk format?
 this one?
https://trilinos.org/oldsite/packages/stk/STK_Tutorial_4.pdf

Or something else?


Before tackling that task, I'd like to get your expert insight on a bunch of things:

* What data types does MOAB support. (I'm looking for something that can be visualized easily, i.e., I want standards. :)

One good example is mbconvert tool;
If you do mbconvert  -l, it will list the supported formats, readers and writers based on build configuration.

Our best supported format (native moab format) is based on HDF5.
For visualization, we use VisIt and Paraview, and you need to build MOAB plugins for moab native hdf5 format. (or, if you can convert to vtk, you do not need to do anything, use any downloaded VisIt or Paraview)

What format do you have for your mesh/data ?

* How does MOAB treat parallel I/O?

MOAB HDF5 reader / writer supports parallel IO natively, in the sense every rank is responsible for a portion (part of a partition) of the mesh. Mesh is partitioned using metis or zoltan.


* In MOAB's notion of meshes, is it possible to generate edges or faces from purely point/cell input data?

Do you have a cloud of points ? Or do you have cell data?  For MOAB , a cell is described either as connectivity (list of vertices) or as a polyhedra, in which we have a list of polygons that define each volume;
If you have cell data, you can build easily in MOAB a list of adjacent faces or edges.

If you have just a cloud of points, you need to build first a mesh, using Delaunay / Voronoi type of algorithms


 We have MOAB documentation here
http://press3.mcs.anl.gov/sigma/moab-library/

Thanks,
Iulian


Cheers,
Nico
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