"Previous Section"_Section_perf.html - "LAMMPS WWW Site"_lws - "LAMMPS
Documentation"_ld - "LAMMPS Commands"_lc - "Next
Section"_Section_modify.html :c

:link(lws,http://lammps.sandia.gov)
:link(ld,Manual.html)
:link(lc,Section_commands.html#comm)

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9. Additional tools :h3

LAMMPS is designed to be a computational kernel for performing
molecular dynamics computations.  Additional pre- and post-processing
steps are often necessary to setup and analyze a simulation. A
list of such tools can be found on the LAMMPS home page
at "http://lammps.sandia.gov/prepost.html"_http://lammps.sandia.gov/prepost.html

A few additional tools are provided with the LAMMPS distribution
and are described in this section.

Our group has also written and released a separate toolkit called
"Pizza.py"_pizza which provides tools for doing setup, analysis,
plotting, and visualization for LAMMPS simulations.  Pizza.py is
written in "Python"_python and is available for download from "the
Pizza.py WWW site"_pizza.

:link(pizza,http://www.sandia.gov/~sjplimp/pizza.html)
:link(python,http://www.python.org)

Note that many users write their own setup or analysis tools or use
other existing codes and convert their output to a LAMMPS input format
or vice versa.  The tools listed here are included in the LAMMPS
distribution as examples of auxiliary tools.  Some of them are not
actively supported by Sandia, as they were contributed by LAMMPS
users.  If you have problems using them, we can direct you to the
authors.

The source code for each of these codes is in the tools sub-directory
of the LAMMPS distribution.  There is a Makefile (which you may need
to edit for your platform) which will build several of the tools which
reside in that directory.  Most of them are larger packages in their
own sub-directories with their own Makefiles and/or README files.

"amber2lmp"_#amber
"binary2txt"_#binary
"ch2lmp"_#charmm
"chain"_#chain
"colvars"_#colvars
"createatoms"_#createatoms
"drude"_#drude
"eam database"_#eamdb
"eam generate"_#eamgn
"eff"_#eff
"emacs"_#emacs
"fep"_#fep
"i-pi"_#ipi
"ipp"_#ipp
"kate"_#kate
"lmp2arc"_#arc
"lmp2cfg"_#cfg
"matlab"_#matlab
"micelle2d"_#micelle
"moltemplate"_#moltemplate
"msi2lmp"_#msi
"phonon"_#phonon
"polybond"_#polybond
"pymol_asphere"_#pymol
"python"_#pythontools
"reax"_#reax_tool
"smd"_#smd
"vim"_#vim
"xmgrace"_#xmgrace

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amber2lmp tool :h4,link(amber)

The amber2lmp sub-directory contains two Python scripts for converting
files back-and-forth between the AMBER MD code and LAMMPS.  See the
README file in amber2lmp for more information.

These tools were written by Keir Novik while he was at Queen Mary
University of London.  Keir is no longer there and cannot support
these tools which are out-of-date with respect to the current LAMMPS
version (and maybe with respect to AMBER as well).  Since we don't use
these tools at Sandia, you'll need to experiment with them and make
necessary modifications yourself.

:line

binary2txt tool :h4,link(binary)

The file binary2txt.cpp converts one or more binary LAMMPS dump file
into ASCII text files.  The syntax for running the tool is

binary2txt file1 file2 ... :pre

which creates file1.txt, file2.txt, etc.  This tool must be compiled
on a platform that can read the binary file created by a LAMMPS run,
since binary files are not compatible across all platforms.

:line

ch2lmp tool :h4,link(charmm)

The ch2lmp sub-directory contains tools for converting files
back-and-forth between the CHARMM MD code and LAMMPS.

They are intended to make it easy to use CHARMM as a builder and as a
post-processor for LAMMPS. Using charmm2lammps.pl, you can convert a
PDB file with associated CHARMM info, including CHARMM force field
data, into its LAMMPS equivalent.  Using lammps2pdb.pl you can convert
LAMMPS atom dumps into PDB files.

See the README file in the ch2lmp sub-directory for more information.

These tools were created by Pieter in't Veld (pjintve at sandia.gov)
and Paul Crozier (pscrozi at sandia.gov) at Sandia.

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chain tool :h4,link(chain)

The file chain.f creates a LAMMPS data file containing bead-spring
polymer chains and/or monomer solvent atoms.  It uses a text file
containing chain definition parameters as an input.  The created
chains and solvent atoms can strongly overlap, so LAMMPS needs to run
the system initially with a "soft" pair potential to un-overlap it.
The syntax for running the tool is

chain < def.chain > data.file :pre

See the def.chain or def.chain.ab files in the tools directory for
examples of definition files.  This tool was used to create the
system for the "chain benchmark"_Section_perf.html.

:line

colvars tools :h4,link(colvars)

The colvars directory contains a collection of tools for postprocessing
data produced by the colvars collective variable library.
To compile the tools, edit the makefile for your system and run "make".

Please report problems and issues the colvars library and its tools
at: https://github.com/colvars/colvars/issues

abf_integrate:

MC-based integration of multidimensional free energy gradient
Version 20110511

Syntax: ./abf_integrate < filename > \[-n < nsteps >\] \[-t < temp >\] \[-m \[0|1\] (metadynamics)\] \[-h < hill_height >\] \[-f < variable_hill_factor >\] :pre

The LAMMPS interface to the colvars collective variable library, as
well as these tools, were created by Axel Kohlmeyer (akohlmey at
gmail.com) at ICTP, Italy.

:line

createatoms tool :h4,link(createatoms)

The tools/createatoms directory contains a Fortran program called
createAtoms.f which can generate a variety of interesting crystal
structures and geometries and output the resulting list of atom
coordinates in LAMMPS or other formats.

See the included Manual.pdf for details.

The tool is authored by Xiaowang Zhou (Sandia), xzhou at sandia.gov.

:line

drude tool :h4,link(drude)

The tools/drude directory contains a Python script called
polarizer.py which can add Drude oscillators to a LAMMPS
data file in the required format.

See the header of the polarizer.py file for details.

The tool is authored by Agilio Padua and Alain Dequidt: agilio.padua
at univ-bpclermont.fr, alain.dequidt at univ-bpclermont.fr

:line

eam database tool :h4,link(eamdb)

The tools/eam_database directory contains a Fortran program that will
generate EAM alloy setfl potential files for any combination of 16
elements: Cu, Ag, Au, Ni, Pd, Pt, Al, Pb, Fe, Mo, Ta, W, Mg, Co, Ti,
Zr.  The files can then be used with the "pair_style
eam/alloy"_pair_eam.html command.

The tool is authored by Xiaowang Zhou (Sandia), xzhou at sandia.gov,
and is based on his paper:

X. W. Zhou, R. A. Johnson, and H. N. G. Wadley, Phys. Rev. B, 69,
144113 (2004).

:line

eam generate tool :h4,link(eamgn)

The tools/eam_generate directory contains several one-file C programs
that convert an analytic formula into a tabulated "embedded atom
method (EAM)"_pair_eam.html setfl potential file.  The potentials they
produce are in the potentials directory, and can be used with the
"pair_style eam/alloy"_pair_eam.html command.

The source files and potentials were provided by Gerolf Ziegenhain
(gerolf at ziegenhain.com).

:line

eff tool :h4,link(eff)

The tools/eff directory contains various scripts for generating
structures and post-processing output for simulations using the
electron force field (eFF).

These tools were provided by Andres Jaramillo-Botero at CalTech
(ajaramil at wag.caltech.edu).

:line

emacs tool :h4,link(emacs)

The tools/emacs directory contains a Lips add-on file for Emacs that
enables a lammps-mode for editing of input scripts when using Emacs,
with various highlighting options setup.

These tools were provided by Aidan Thompson at Sandia
(athomps at sandia.gov).

:line

fep tool :h4,link(fep)

The tools/fep directory contains Python scripts useful for
post-processing results from performing free-energy perturbation
simulations using the USER-FEP package.

The scripts were contributed by Agilio Padua (Universite Blaise
Pascal Clermont-Ferrand), agilio.padua at univ-bpclermont.fr.

See README file in the tools/fep directory.

:line

i-pi tool :h4,link(ipi)

The tools/i-pi directory contains a version of the i-PI package, with
all the LAMMPS-unrelated files removed.  It is provided so that it can
be used with the "fix ipi"_fix_ipi.html command to perform
path-integral molecular dynamics (PIMD).

The i-PI package was created and is maintained by Michele Ceriotti,
michele.ceriotti at gmail.com, to interface to a variety of molecular
dynamics codes.

See the tools/i-pi/manual.pdf file for an overview of i-PI, and the
"fix ipi"_fix_ipi.html doc page for further details on running PIMD
calculations with LAMMPS.

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ipp tool :h4,link(ipp)

The tools/ipp directory contains a Perl script ipp which can be used
to facilitate the creation of a complicated file (say, a lammps input
script or tools/createatoms input file) using a template file.

ipp was created and is maintained by Reese Jones (Sandia), rjones at
sandia.gov.

See two examples in the tools/ipp directory.  One of them is for the
tools/createatoms tool's input file.

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kate tool :h4,link(kate)

The file in the tools/kate directory is an add-on to the Kate editor
in the KDE suite that allow syntax highlighting of LAMMPS input
scripts.  See the README.txt file for details.

The file was provided by Alessandro Luigi Sellerio
(alessandro.sellerio at ieni.cnr.it).

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lmp2arc tool :h4,link(arc)

The lmp2arc sub-directory contains a tool for converting LAMMPS output
files to the format for Accelrys' Insight MD code (formerly
MSI/Biosym and its Discover MD code).  See the README file for more
information.

This tool was written by John Carpenter (Cray), Michael Peachey
(Cray), and Steve Lustig (Dupont).  John is now at the Mayo Clinic
(jec at mayo.edu), but still fields questions about the tool.

This tool was updated for the current LAMMPS C++ version by Jeff
Greathouse at Sandia (jagreat at sandia.gov).

:line

lmp2cfg tool :h4,link(cfg)

The lmp2cfg sub-directory contains a tool for converting LAMMPS output
files into a series of *.cfg files which can be read into the
"AtomEye"_http://mt.seas.upenn.edu/Archive/Graphics/A visualizer.  See
the README file for more information.

This tool was written by Ara Kooser at Sandia (askoose at sandia.gov).

:line

matlab tool :h4,link(matlab)

The matlab sub-directory contains several "MATLAB"_matlabhome scripts for
post-processing LAMMPS output.  The scripts include readers for log
and dump files, a reader for EAM potential files, and a converter that
reads LAMMPS dump files and produces CFG files that can be visualized
with the "AtomEye"_http://mt.seas.upenn.edu/Archive/Graphics/A
visualizer.

See the README.pdf file for more information.

These scripts were written by Arun Subramaniyan at Purdue Univ
(asubrama at purdue.edu).

:link(matlabhome,http://www.mathworks.com)

:line

micelle2d tool :h4,link(micelle)

The file micelle2d.f creates a LAMMPS data file containing short lipid
chains in a monomer solution.  It uses a text file containing lipid
definition parameters as an input.  The created molecules and solvent
atoms can strongly overlap, so LAMMPS needs to run the system
initially with a "soft" pair potential to un-overlap it.  The syntax
for running the tool is

micelle2d < def.micelle2d > data.file :pre

See the def.micelle2d file in the tools directory for an example of a
definition file.  This tool was used to create the system for the
"micelle example"_Section_example.html.

:line

moltemplate tool :h4,link(moltemplate)

The moltemplate sub-directory contains a Python-based tool for
building molecular systems based on a text-file description, and
creating LAMMPS data files that encode their molecular topology as
lists of bonds, angles, dihedrals, etc.  See the README.TXT file for
more information.

This tool was written by Andrew Jewett (jewett.aij at gmail.com), who
supports it.  It has its own WWW page at
"http://moltemplate.org"_http://moltemplate.org.

:line

msi2lmp tool :h4,link(msi)

The msi2lmp sub-directory contains a tool for creating LAMMPS template
input and data files from BIOVIA's Materias Studio files (formerly Accelrys'
Insight MD code, formerly MSI/Biosym and its Discover MD code).

This tool was written by John Carpenter (Cray), Michael Peachey
(Cray), and Steve Lustig (Dupont). Several people contributed changes
to remove bugs and adapt its output to changes in LAMMPS.

This tool has several known limitations and is no longer under active
development, so there are no changes except for the occasional bugfix.

See the README file in the tools/msi2lmp folder for more information.

:line

phonon tool :h4,link(phonon)

The phonon sub-directory contains a post-processing tool useful for
analyzing the output of the "fix phonon"_fix_phonon.html command in
the USER-PHONON package.

See the README file for instruction on building the tool and what
library it needs.  And see the examples/USER/phonon directory
for example problems that can be post-processed with this tool.

This tool was written by Ling-Ti Kong at Shanghai Jiao Tong
University.

:line

polybond tool :h4,link(polybond)

The polybond sub-directory contains a Python-based tool useful for
performing "programmable polymer bonding".  The Python file
lmpsdata.py provides a "Lmpsdata" class with various methods which can
be invoked by a user-written Python script to create data files with
complex bonding topologies.

See the Manual.pdf for details and example scripts.

This tool was written by Zachary Kraus at Georgia Tech.

:line

pymol_asphere tool :h4,link(pymol)

The pymol_asphere sub-directory contains a tool for converting a
LAMMPS dump file that contains orientation info for ellipsoidal
particles into an input file for the "PyMol visualization
package"_pymolhome or its "open source variant"_pymolopen.

:link(pymolhome,http://www.pymol.org)
:link(pymolopen,http://sourceforge.net/scm/?type=svn&group_id=4546)

Specifically, the tool triangulates the ellipsoids so they can be
viewed as true ellipsoidal particles within PyMol.  See the README and
examples directory within pymol_asphere for more information.

This tool was written by Mike Brown at Sandia.

:line

python tool :h4,link(pythontools)

The python sub-directory contains several Python scripts
that perform common LAMMPS post-processing tasks, such as:

extract thermodynamic info from a log file as columns of numbers
plot two columns of thermodynamic info from a log file using GnuPlot
sort the snapshots in a dump file by atom ID
convert multiple "NEB"_neb.html dump files into one dump file for viz
convert dump files into XYZ, CFG, or PDB format for viz by other packages :ul

These are simple scripts built on "Pizza.py"_pizza modules.  See the
README for more info on Pizza.py and how to use these scripts.

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reax tool :h4,link(reax_tool)

The reax sub-directory contains stand-alond codes that can
post-process the output of the "fix reax/bonds"_fix_reax_bonds.html
command from a LAMMPS simulation using "ReaxFF"_pair_reax.html.  See
the README.txt file for more info.

These tools were written by Aidan Thompson at Sandia.

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smd tool :h4,link(smd)

The smd sub-directory contains a C++ file dump2vtk_tris.cpp and
Makefile which can be compiled and used to convert triangle output
files created by the Smooth-Mach Dynamics (USER-SMD) package into a
VTK-compatible unstructured grid file.  It could then be read in and
visualized by VTK.

See the header of dump2vtk.cpp for more details.

This tool was written by the USER-SMD package author, Georg
Ganzenmuller at the Fraunhofer-Institute for High-Speed Dynamics,
Ernst Mach Institute in Germany (georg.ganzenmueller at emi.fhg.de).

:line

vim tool :h4,link(vim)

The files in the tools/vim directory are add-ons to the VIM editor
that allow easier editing of LAMMPS input scripts.  See the README.txt
file for details.

These files were provided by Gerolf Ziegenhain (gerolf at
ziegenhain.com)

:line

xmgrace tool :h4,link(xmgrace)

The files in the tools/xmgrace directory can be used to plot the
thermodynamic data in LAMMPS log files via the xmgrace plotting
package.  There are several tools in the directory that can be used in
post-processing mode.  The lammpsplot.cpp file can be compiled and
used to create plots from the current state of a running LAMMPS
simulation.

See the README file for details.

These files were provided by Vikas Varshney (vv0210 at gmail.com)

