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

	#ifdef FIX_CLASS

	FixStyle(freeze,FixFreeze)

	#else

	#ifndef LMP_FIX_FREEZE_H
	#define LMP_FIX_FREEZE_H

	#include "fix.h"

	namespace LAMMPS_NS {

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

	private:
	int force_flag;
	double foriginal[3],foriginal_all[3];
	};

	}

	#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: Fix freeze requires atom attribute torque

	The atom style defined does not have this attribute.

	E: More than one fix freeze

	Only one of these fixes can be defined, since the granular pair
	potentials access it.

	*/