/* ----------------------------------------------------------------------
   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.

   See the README file in the top-level LAMMPS directory.
------------------------------------------------------------------------- */

#ifdef PAIR_CLASS

PairStyle(peri/lps,PairPeriLPS)

#else

#ifndef LMP_PAIR_PERI_LPS_H
#define LMP_PAIR_PERI_LPS_H

#include "pair.h"

namespace LAMMPS_NS {

class PairPeriLPS : public Pair {
 public:
  PairPeriLPS(class LAMMPS *);
  virtual ~PairPeriLPS();
  int pack_comm(int, int *, double *, int, int *);
  void unpack_comm(int, int, double *);

  virtual void compute(int, int);
  void settings(int, char **);
  void coeff(int, char **);
  double init_one(int, int);
  void init_style();
  void write_restart(FILE *);
  void read_restart(FILE *);
  void write_restart_settings(FILE *) {}
  void read_restart_settings(FILE *) {}
  double single(int, int, int, int, double, double, double, double &);
  double memory_usage();
  double influence_function(double, double, double);
  void compute_dilatation();

 protected:
  int ifix_peri;
  double **bulkmodulus;
  double **shearmodulus;
  double **s00, **alpha;
  double **cut;   

  double *s0_new;
  double *theta;
  int nmax;

  void allocate();
};

}

#endif
#endif

/* ERROR/WARNING messages:

E: Illegal ... command

Self-explanatory.  Check the input script syntax and compare to the
documentation for the command.  You can use -echo screen as a
command-line option when running LAMMPS to see the offending line.

E: Incorrect args for pair coefficients

Self-explanatory.  Check the input script or data file.

E: All pair coeffs are not set

All pair coefficients must be set in the data file or by the
pair_coeff command before running a simulation.

E: Pair style peri requires atom style peri

Self-explanatory.

E: Pair peri requires an atom map, see atom_modify

Even for atomic systems, an atom map is required to find Peridynamic
bonds.  Use the atom_modify command to define one.

E: Pair peri requires a lattice be defined

Use the lattice command for this purpose.

E: Pair peri lattice is not identical in x, y, and z

The lattice defined by the lattice command must be cubic.

E: Fix peri neigh does not exist

Somehow a fix that the pair style defines has been deleted.

E: Divide by 0 in influence function of pair peri/lps

This should not normally occur.  It is likely a problem with your
model.

*/