region_union.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.
	------------------------------------------------------------------------- */

	#ifdef REGION_CLASS

	RegionStyle(union,RegUnion)

	#else

	#ifndef LMP_REGION_UNION_H
	#define LMP_REGION_UNION_H

	#include "region.h"

	namespace LAMMPS_NS {

	class RegUnion : public Region {
	public:
	RegUnion(class LAMMPS , int, char *);
	~RegUnion();
	void init();
	int dynamic_check();
	int inside(double, double, double);
	int surface_interior(double *, double);
	int surface_exterior(double *, double);
	void shape_update();

	private:
	int nregion;
	int *list;
	char **idsub;
	};

	}

	#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: Region union region ID does not exist

	One or more of the region IDs specified by the region union command
	does not exist.

	*/