orientation of group of atoms

Is there any way to find out the orientation of group of atoms after simulations.

We are doing solidification simulation. We want know about the orientation of atoms in solidified region.

Is there any way to find out the orientation of group of atoms after
simulations.

why not?

We are doing solidification simulation. We want know about the
orientation of atoms in solidified region.

first of all, this would be a postprocessing problem,
so not really a lammps issue. second, you first
have to define what orientation would mean in this
context and how groups would be defined.

axel.

You could also look at commands
like compute centro/atom and compute cna/atom
which calculate local order parameters on-the-fly.
But knowing an atom is part of a local bcc environment
does not tell you what direction the bcc lattice
is oriented. As Axel said, you would have to
post-process that. If someone knows how to
compute that on a per-atom basis as strictly a local property (as
a function of an atom and its neighbors, then it would
not be hard to add to LAMMPS as a per-atom compute.

Steve