(no subject)

Hello
I use rigid particles and I need to limit them to be on specified lattice points. I manage to define region points as integer or sth like this.
Is it possible?

sincerely

https://lammps.sandia.gov/doc/fix_rigid.html

Your Q sounds like it is about creating or defining rigid bodies initially.
The create_atoms command can create rigid bodies on a lattice
or on specific points (one by one). Or you can read a data file
which defines the atoms of rigid bodies and put them wherever you wish.

Steve

Your Q sounds like it is about creating or defining rigid bodies initially.
The create_atoms command can create rigid bodies on a lattice
or on specific points (one by one). Or you can read a data file
which defines the atoms of rigid bodies and put them wherever you wish.
Steve

There's a really old web page that does a great job of explaining the
basics of the DATA file format here:
http://lammps.sandia.gov/doc/2001/data_format.html

This does not describe some of the more recent (more advanced)
features of the data file, but it's a good place to start.

If you want to use 3rd-party tools to create the data file, there's a
list of them here:
https://lammps.sandia.gov/prepost.html

and some additional tools listed here:
https://sgsaenger.github.io/vipster/
https://sourceforge.net/projects/moleculardynami/
https://github.com/lammps/lammps/tree/master/tools/msi2lmp
https://github.com/lammps/lammps/tree/master/tools/ch2lmp
https://github.com/lammps/lammps/tree/master/tools/amber2lmp

Cheers
Andrew