1 /* ----------------------------------------------------------------------
2     This is the
3 
4     ██╗     ██╗ ██████╗  ██████╗  ██████╗ ██╗  ██╗████████╗███████╗
5     ██║     ██║██╔════╝ ██╔════╝ ██╔════╝ ██║  ██║╚══██╔══╝██╔════╝
6     ██║     ██║██║  ███╗██║  ███╗██║  ███╗███████║   ██║   ███████╗
7     ██║     ██║██║   ██║██║   ██║██║   ██║██╔══██║   ██║   ╚════██║
8     ███████╗██║╚██████╔╝╚██████╔╝╚██████╔╝██║  ██║   ██║   ███████║
9     ╚══════╝╚═╝ ╚═════╝  ╚═════╝  ╚═════╝ ╚═╝  ╚═╝   ╚═╝   ╚══════╝®
10 
11     DEM simulation engine, released by
12     DCS Computing Gmbh, Linz, Austria
13     http://www.dcs-computing.com, office@dcs-computing.com
14 
15     LIGGGHTS® is part of CFDEM®project:
16     http://www.liggghts.com | http://www.cfdem.com
17 
18     Core developer and main author:
19     Christoph Kloss, christoph.kloss@dcs-computing.com
20 
21     LIGGGHTS® is open-source, distributed under the terms of the GNU Public
22     License, version 2 or later. It is distributed in the hope that it will
23     be useful, but WITHOUT ANY WARRANTY; without even the implied warranty
24     of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. You should have
25     received a copy of the GNU General Public License along with LIGGGHTS®.
26     If not, see http://www.gnu.org/licenses . See also top-level README
27     and LICENSE files.
28 
29     LIGGGHTS® and CFDEM® are registered trade marks of DCS Computing GmbH,
30     the producer of the LIGGGHTS® software and the CFDEM®coupling software
31     See http://www.cfdem.com/terms-trademark-policy for details.
32 
33 -------------------------------------------------------------------------
34     Contributing author and copyright for this file:
35     This file is from LAMMPS
36     LAMMPS - Large-scale Atomic/Molecular Massively Parallel Simulator
37     http://lammps.sandia.gov, Sandia National Laboratories
38     Steve Plimpton, sjplimp@sandia.gov
39 
40     Copyright (2003) Sandia Corporation.  Under the terms of Contract
41     DE-AC04-94AL85000 with Sandia Corporation, the U.S. Government retains
42     certain rights in this software.  This software is distributed under
43     the GNU General Public License.
44 ------------------------------------------------------------------------- */
45 
46 #ifdef FIX_CLASS
47 
48 FixStyle(efield,FixEfield)
49 
50 #else
51 
52 #ifndef LMP_FIX_EFIELD_H
53 #define LMP_FIX_EFIELD_H
54 
55 #include "fix.h"
56 
57 namespace LAMMPS_NS {
58 
59 class FixEfield : public Fix {
60  public:
61   FixEfield(class LAMMPS *, int, char **);
62   ~FixEfield();
63   int setmask();
64   void init();
65   void setup(int);
66   void post_force(int);
67   void post_force_respa(int, int, int);
68   double memory_usage();
69 
70  private:
71   double ex,ey,ez;
72   int varflag;
73   char *xstr,*ystr,*zstr;
74   int xvar,yvar,zvar,xstyle,ystyle,zstyle;
75   int nlevels_respa;
76   double qe2f;
77 
78   int maxatom;
79   double **efield;
80 };
81 
82 }
83 
84 #endif
85 #endif
86 
87 /* ERROR/WARNING messages:
88 
89 E: Illegal ... command
90 
91 Self-explanatory.  Check the input script syntax and compare to the
92 documentation for the command.  You can use -echo screen as a
93 command-line option when running LAMMPS to see the offending line.
94 
95 E: Fix efield requires atom attribute q
96 
97 Self-explanatory.
98 
99 E: Variable name for fix efield does not exist
100 
101 Self-explanatory.
102 
103 E: Variable for fix efield is invalid style
104 
105 Only equal-style variables can be used.
106 
107 */
108