forked from lijiext/lammps
68 lines
1.9 KiB
C++
68 lines
1.9 KiB
C++
/* ----------------------------------------------------------------------
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LAMMPS - Large-scale Atomic/Molecular Massively Parallel Simulator
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http://lammps.sandia.gov, Sandia National Laboratories
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Steve Plimpton, sjplimp@sandia.gov
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Copyright (2003) Sandia Corporation. Under the terms of Contract
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DE-AC04-94AL85000 with Sandia Corporation, the U.S. Government retains
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certain rights in this software. This software is distributed under
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the GNU General Public License.
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See the README file in the top-level LAMMPS directory.
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------------------------------------------------------------------------- */
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#include "string.h"
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#include "fix_nph.h"
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#include "modify.h"
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#include "error.h"
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using namespace LAMMPS_NS;
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/* ---------------------------------------------------------------------- */
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FixNPH::FixNPH(LAMMPS *lmp, int narg, char **arg) :
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FixNH(lmp, narg, arg)
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{
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if (tstat_flag)
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error->all("Temperature control can not be used with fix nph");
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if (!pstat_flag)
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error->all("Pressure control must be used with fix nph");
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// create a new compute temp style
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// id = fix-ID + temp
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// compute group = all since pressure is always global (group all)
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// and thus its KE/temperature contribution should use group all
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int n = strlen(id) + 6;
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id_temp = new char[n];
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strcpy(id_temp,id);
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strcat(id_temp,"_temp");
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char **newarg = new char*[3];
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newarg[0] = id_temp;
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newarg[1] = (char *) "all";
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newarg[2] = (char *) "temp";
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modify->add_compute(3,newarg);
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delete [] newarg;
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tflag = 1;
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// create a new compute pressure style
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// id = fix-ID + press, compute group = all
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// pass id_temp as 4th arg to pressure constructor
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n = strlen(id) + 7;
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id_press = new char[n];
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strcpy(id_press,id);
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strcat(id_press,"_press");
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newarg = new char*[4];
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newarg[0] = id_press;
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newarg[1] = (char *) "all";
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newarg[2] = (char *) "pressure";
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newarg[3] = id_temp;
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modify->add_compute(4,newarg);
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delete [] newarg;
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pflag = 1;
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}
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