/* ----------------------------------------------------------------------
    This is the

    ██╗     ██╗ ██████╗  ██████╗  ██████╗ ██╗  ██╗████████╗███████╗
    ██║     ██║██╔════╝ ██╔════╝ ██╔════╝ ██║  ██║╚══██╔══╝██╔════╝
    ██║     ██║██║  ███╗██║  ███╗██║  ███╗███████║   ██║   ███████╗
    ██║     ██║██║   ██║██║   ██║██║   ██║██╔══██║   ██║   ╚════██║
    ███████╗██║╚██████╔╝╚██████╔╝╚██████╔╝██║  ██║   ██║   ███████║
    ╚══════╝╚═╝ ╚═════╝  ╚═════╝  ╚═════╝ ╚═╝  ╚═╝   ╚═╝   ╚══════╝®

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

#ifdef COMPUTE_CLASS

ComputeStyle(pressure,ComputePressure)

#else

#ifndef LMP_COMPUTE_PRESSURE_H
#define LMP_COMPUTE_PRESSURE_H

#include "compute.h"

namespace LAMMPS_NS {

class ComputePressure : public Compute {
 public:
  ComputePressure(class LAMMPS *, int &iarg, int, char **);
  virtual ~ComputePressure();
  void init();
  double compute_scalar();
  void compute_vector();
  void reset_extra_compute_fix(const char *);

 protected:
  double boltz,nktv2p,inv_volume;
  int nvirial,dimension;
  double **vptr;
  double *kspace_virial;
  Compute *temperature;
  char *id_temp;
  double virial[6];
  int keflag,pairflag,bondflag,angleflag,dihedralflag,improperflag;
  int fixflag,kspaceflag;

  void virial_compute(int, int);
};

}

#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: Compute pressure must use group all

Virial contributions computed by potentials (pair, bond, etc) are
computed on all atoms.

E: Could not find compute pressure temperature ID

The compute ID for calculating temperature does not exist.

E: Compute pressure temperature ID does not compute temperature

The compute ID assigned to a pressure computation must compute
temperature.

E: Virial was not tallied on needed timestep

You are using a thermo keyword that requires potentials to
have tallied the virial, but they didn't on this timestep.  See the
variable doc page for ideas on how to make this work.

*/