/usr/include/liggghts/min_linesearch.h is in libliggghts-dev 3.3.1+repack1-1ubuntu3.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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This is the
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╚══════╝╚═╝ ╚═════╝ ╚═════╝ ╚═════╝ ╚═╝ ╚═╝ ╚═╝ ╚══════╝®
DEM simulation engine, released by
DCS Computing Gmbh, Linz, Austria
http://www.dcs-computing.com, office@dcs-computing.com
LIGGGHTS® is part of CFDEM®project:
http://www.liggghts.com | http://www.cfdem.com
Core developer and main author:
Christoph Kloss, christoph.kloss@dcs-computing.com
LIGGGHTS® is open-source, distributed under the terms of the GNU Public
License, version 2 or later. It is distributed in the hope that it will
be useful, but WITHOUT ANY WARRANTY; without even the implied warranty
of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. You should have
received a copy of the GNU General Public License along with LIGGGHTS®.
If not, see http://www.gnu.org/licenses . See also top-level README
and LICENSE files.
LIGGGHTS® and CFDEM® are registered trade marks of DCS Computing GmbH,
the producer of the LIGGGHTS® software and the CFDEM®coupling software
See http://www.cfdem.com/terms-trademark-policy for details.
-------------------------------------------------------------------------
Contributing author and copyright for this file:
This file is from LAMMPS
LAMMPS - Large-scale Atomic/Molecular Massively Parallel Simulator
http://lammps.sandia.gov, Sandia National Laboratories
Steve Plimpton, sjplimp@sandia.gov
Copyright (2003) Sandia Corporation. Under the terms of Contract
DE-AC04-94AL85000 with Sandia Corporation, the U.S. Government retains
certain rights in this software. This software is distributed under
the GNU General Public License.
------------------------------------------------------------------------- */
#ifndef LMP_MIN_LSRCH_H
#define LMP_MIN_LSRCH_H
#include "min.h"
namespace LAMMPS_NS {
class MinLineSearch : public Min {
public:
MinLineSearch(class LAMMPS *);
~MinLineSearch();
void init();
void setup_style();
void reset_vectors();
protected:
// vectors needed by linesearch minimizers
// allocated and stored by fix_minimize
// x,f are stored by parent or Atom class or Pair class
double *x0; // coords at start of linesearch
double *g; // old gradient vector
double *h; // search direction vector
double *gextra; // g,h for extra global dof, x0 is stored by fix
double *hextra;
double **x0extra_atom; // x0,g,h for extra per-atom dof
double **gextra_atom;
double **hextra_atom;
typedef int (MinLineSearch::*FnPtr)(double, double &);
FnPtr linemin;
int linemin_backtrack(double, double &);
int linemin_quadratic(double, double &);
int linemin_forcezero(double, double &);
double alpha_step(double, int);
double compute_dir_deriv(double &);
};
}
#endif
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