CLHEP/Random/RandBreitWigner.h
// $Id: RandBreitWigner.h,v 1.7 2000/04/17 22:59:51 mf Exp $
// -*- C++ -*-
//
// -----------------------------------------------------------------------
// HEP Random
// --- RandBreitWigner ---
// class header file
// -----------------------------------------------------------------------
// This file is part of Geant4 (simulation toolkit for HEP).
//
// Class defining methods for shooting numbers according to the
// Breit-Wigner distribution algorithms (plain or mean^2).
// Default values are set: mean=1, gamma=.2, cut=1.
// Plain algorithm is used for shootArray() and fireArray().
// Plain algorithm with default values is used for operator()().
// =======================================================================
// Gabriele Cosmo - Created: 5th September 1995
// - Added methods to shoot arrays: 28th July 1997
// J.Marraffino - Added default arguments as attributes and
// operator() with arguments: 16th Feb 1998
// =======================================================================
#ifndef RandBreitWigner_h
#define RandBreitWigner_h 1
#include "CLHEP/Random/RandFlat.h"
class RandBreitWigner : public HepRandom {
public:
inline RandBreitWigner ( HepRandomEngine& anEngine, HepDouble a=1.0,
HepDouble b=0.2 );
inline RandBreitWigner ( HepRandomEngine* anEngine, HepDouble a=1.0,
HepDouble b=0.2 );
// These constructors should be used to instantiate a RandBreitWigner
// distribution object defining a local engine for it.
// The static generator will be skipped using the non-static methods
// defined below.
// If the engine is passed by pointer the corresponding engine object
// will be deleted by the RandBreitWigner destructor.
// If the engine is passed by reference the corresponding engine object
// will not be deleted by the RandBreitWigner destructor.
virtual ~RandBreitWigner();
// Destructor
// Static methods to shoot random values using the static generator
static HepDouble shoot( HepDouble a=1.0, HepDouble b=0.2 );
static HepDouble shoot( HepDouble a, HepDouble b, HepDouble c );
static HepDouble shootM2( HepDouble a=1.0, HepDouble b=0.2 );
static HepDouble shootM2( HepDouble a, HepDouble b, HepDouble c );
static void shootArray ( const HepInt size, HepDouble* vect);
static void shootArray ( const HepInt size, HepDouble* vect,
HepDouble a, HepDouble b );
static void shootArray ( const HepInt size, HepDouble* vect,
HepDouble a, HepDouble b, HepDouble c );
// Static methods to shoot random values using a given engine
// by-passing the static generator.
static HepDouble shoot( HepRandomEngine* anEngine, HepDouble a=1.0,
HepDouble b=0.2 );
static HepDouble shoot( HepRandomEngine* anEngine, HepDouble a,
HepDouble b, HepDouble c );
static HepDouble shootM2( HepRandomEngine* anEngine, HepDouble a=1.0,
HepDouble b=0.2 );
static HepDouble shootM2( HepRandomEngine* anEngine, HepDouble a,
HepDouble b, HepDouble c );
static void shootArray ( HepRandomEngine* anEngine,
const HepInt size, HepDouble* vect );
static void shootArray ( HepRandomEngine* anEngine,
const HepInt size, HepDouble* vect,
HepDouble a, HepDouble b );
static void shootArray ( HepRandomEngine* anEngine,
const HepInt size, HepDouble* vect,
HepDouble a, HepDouble b, HepDouble c );
// Methods using the localEngine to shoot random values, by-passing
// the static generator. These methods respect distribution parameters
// passed by the user at instantiation unless superseded by actual
// arguments in the call.
HepDouble fire();
HepDouble fire( HepDouble a, HepDouble b );
HepDouble fire( HepDouble a, HepDouble b, HepDouble c );
HepDouble fireM2();
HepDouble fireM2( HepDouble a, HepDouble b );
HepDouble fireM2( HepDouble a, HepDouble b, HepDouble c );
void fireArray ( const HepInt size, HepDouble* vect);
void fireArray ( const HepInt size, HepDouble* vect,
HepDouble a, HepDouble b );
void fireArray ( const HepInt size, HepDouble* vect,
HepDouble a, HepDouble b, HepDouble c );
HepDouble operator()();
HepDouble operator()( HepDouble a, HepDouble b );
HepDouble operator()( HepDouble a, HepDouble b, HepDouble c );
private:
// Private copy constructor. Defining it here disallows use.
RandBreitWigner(const RandBreitWigner& d);
HepRandomEngine* localEngine;
HepBoolean deleteEngine;
const HepDouble defaultA;
const HepDouble defaultB;
};
#include "CLHEP/Random/RandBreitWigner.icc"
#endif
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