genice2-cage

A GenIce2 format plugin to detect cage-like topologies.

version 2.1

Requirements

• cycless
• attrdict
• networkx
• numpy
• yaplotlib>=0.1.2
• genice2>=2.1b0

Installation from PyPI

% pip install genice2-cage

Manual Installation

System-wide installation

% make install

Private installation

Copy the files in genice2_cage/formats/ into your local formats/ folder.

Usage

Usage:
    % genice CS1 -r 2 2 2 -f cage[12,14-16:ring=-6]
    % genice CRN1 -f cage[sizes=3-10:json]
    % genice CRN1 -f cage[sizes=3-10:yaplot]
    % genice CS2 -w tip4p -f cage[gromacs:sizes=-16:ring=5,6]
    % analice traj.gro -O OW -H HW[12] -w tip4p -f cage[quad]
    % analice traj.gro -O OW -H HW[12] -w tip4p -f cage[quad:json]

It may not work with a small structure. (In the example above, the unit cell of CS1 is extended to 2x2x2 so as to avoid detecting cell-spanning wierd cages.)

Options:
    Cage sizes to be listed, separated by commas and ranged with hyphens. (e.g. -4,6,8-10,16-) (default is 3-16)
    ring=3,5-6 Specify the ring sizes that cages are built of (default is 3-8, maximum is 8).
    json       Output values in [JSON](https://www.json.org/) format.
    yaplot     Visualize cages with [Yaplot](https://github.com/vitroid/Yaplot/). Cages are drawn in different layers according to the number of faces, and faces are colored according to the number of vertices.
    gromacs    Output individual cages in Gromacs format. (EXPERIMENTAL)
    quad       Quadcage order parameter to identify the Frank-Kasper-type crystal structures.[JMM2011] Cages sizes and maximum ring size are set appropriately automatically.
    python     Output cage types in python format convenient for GenIce lattice modules.
* [JMM2011] Jacobson, L. C., Matsumoto, M. & Molinero, V. Order parameters for the multistep crystallization of clathrate hydrates. J. Chem. Phys. 135, 074501 (2011).[doi:10.1063/1.3613667](https://doi.org/10.1063/1.3613667)

Test in place

% make test

Algorithms

• M. Matsumoto, A. Baba, and I. Ohmine, Topological building blocks of hydrogen bond network in water, J. Chem. Phys. 127, 134504 (2007); doi:10.1063/1.2772627