fix_langevin.h
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	/* ----------------------------------------------------------------------
	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.
	------------------------------------------------------------------------- */

	#ifndef FIX_LANGEVIN_H
	#define FIX_LANGEVIN_H

	#include "fix.h"

	namespace LAMMPS_NS {

	class FixLangevin : public Fix {
	public:
	FixLangevin(class LAMMPS , int, char *);
	~FixLangevin();
	int setmask();
	void init();
	void setup();
	void post_force(int);
	void post_force_respa(int, int, int);
	void reset_target(double);

	private:
	double t_start,t_stop,t_period;
	int flagx,flagy,flagz,iregion;
	double gfactor1,gfactor2,*ratio;

	int nlevels_respa;
	class RanMars *random;
	};

	}

	#endif