random_mars.h
7887ffed73b3master

random_mars.h
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			/* -- c++ -- ----------------------------------------------------------
			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 LMP_RANMARS_H
			#define LMP_RANMARS_H

			#include "pointers.h"

			namespace LAMMPS_NS {

			class RanMars : protected Pointers {
			public:
			RanMars(class LAMMPS *, int);
			~RanMars();
			double uniform();
			double gaussian();

			private:
			int save;
			double second;
			double *u;
			int i97,j97;
			double c,cd,cm;
			};

			}

			#endif

			/* ERROR/WARNING messages:

			E: Invalid seed for Marsaglia random # generator

			The initial seed for this random number generator must be a positive
			integer less than or equal to 900 million.

			*/