1 /* -*- c++ -*- ----------------------------------------------------------
2    LAMMPS - Large-scale Atomic/Molecular Massively Parallel Simulator
3    https://www.lammps.org/, Sandia National Laboratories
4    Steve Plimpton, sjplimp@sandia.gov
5 
6    Copyright (2003) Sandia Corporation.  Under the terms of Contract
7    DE-AC04-94AL85000 with Sandia Corporation, the U.S. Government retains
8    certain rights in this software.  This software is distributed under
9    the GNU General Public License.
10 
11    See the README file in the top-level LAMMPS directory.
12 ------------------------------------------------------------------------- */
13 
14 #ifdef ANGLE_CLASS
15 // clang-format off
16 AngleStyle(quartic,AngleQuartic);
17 // clang-format on
18 #else
19 
20 #ifndef LMP_ANGLE_QUARTIC_H
21 #define LMP_ANGLE_QUARTIC_H
22 
23 #include "angle.h"
24 
25 namespace LAMMPS_NS {
26 
27 class AngleQuartic : public Angle {
28  public:
29   AngleQuartic(class LAMMPS *);
30   virtual ~AngleQuartic();
31   virtual void compute(int, int);
32   void coeff(int, char **);
33   double equilibrium_angle(int);
34   void write_restart(FILE *);
35   void read_restart(FILE *);
36   void write_data(FILE *);
37   double single(int, int, int, int);
38 
39  protected:
40   double *k2, *k3, *k4, *theta0;
41 
42   void allocate();
43 };
44 
45 }    // namespace LAMMPS_NS
46 
47 #endif
48 #endif
49