PaqAtcUtility.h
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	// A class for defining atomic information used by the per-atom quantities
	// this is required so they can be templatized

	#ifndef PAQ_ATC_UTILITY_H
	#define PAQ_ATC_UTILITY_H

	#include "ATC_TypeDefs.h"
	#include "Array.h"
	#include "ATC_Error.h"

	namespace ATC {

	// forward declarations
	class ATC_Method;
	class FE_Engine;

	class PaqAtcUtility {

	public:

	// constructor
	PaqAtcUtility(ATC_Method * atc, AtomType atomType=NO_ATOMS);

	// destructor
	~PaqAtcUtility() {};

	// get the number of local atoms associated with this type
	int nlocal() const;

	// get the total number of atoms on this processor
	int nlocal_total() const;

	/** get the number of spatial dimensions */
	int nsd() const;

	/** get the timestep size */
	double dt() const;

	/** get the map from atc to lammps indexing for this type */
	const Array<int> & atc_to_lammps_map() const;

	/** access to the engine */
	const FE_Engine * fe_engine() const;

	protected:

	/** pointer to atc object */
	ATC_Method * atc_;

	/** type of atoms this quantity applies to */
	AtomType atomType_;

	/** function pointer to number of local atoms for this quantity */
	int (ATC_Method::*myNlocal)() const;

	private:

	// do not define
	PaqAtcUtility();

	};

	}

	#endif