============
Confined ice
============


Classify ice in a nanotube or a monolayer.

The engine functions are ``ring::prismAnalysis`` (one-dimensional
prisms) and ``ring::polygonRingAnalysis`` (two-dimensional sheets).
Those names live on `API <../reference/api.rst>`_. The ``seams``
CLI does not expose them.

Use a scripting front end:

- Lua examples under ``example_lua/iceNanotube/`` in
  `yodaStruct <https://github.com/d-SEAMS/yodaStruct>`_

- ``Frame.find_prisms`` and ``Frame.find_polygons`` in
  `pydseams <https://d-seams.github.io/PydSEAMSlib/>`_

External dumps (figshare project 73545):
``Quasi-1D_Nanotube_LAMMPS_Trajectory`` and
``Monolayer_LAMMPS_Trajectory``. This repository does not ship those
files and does not pin prism counts.

For the in-tree mixed TIP4P dump, start with
`the mixed TIP4P tutorial <../tutorials/bulk-ice.rst>`_.