Gabriele Cosmo
167 lines
6.1 KiB
C++
167 lines
6.1 KiB
C++
//
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// ********************************************************************
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// * License and Disclaimer *
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// * *
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// * The Geant4 software is copyright of the Copyright Holders of *
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// * the Geant4 Collaboration. It is provided under the terms and *
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// * conditions of the Geant4 Software License, included in the file *
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// * LICENSE and available at http://cern.ch/geant4/license . These *
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// * include a list of copyright holders. *
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// * *
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// * Neither the authors of this software system, nor their employing *
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// * institutes,nor the agencies providing financial support for this *
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// * work make any representation or warranty, express or implied, *
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// * regarding this software system or assume any liability for its *
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// * use. Please see the license in the file LICENSE and URL above *
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// * for the full disclaimer and the limitation of liability. *
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// * *
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// * This code implementation is the result of the scientific and *
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// * technical work of the GEANT4 collaboration. *
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// * By using, copying, modifying or distributing the software (or *
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// * any work based on the software) you agree to acknowledge its *
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// * use in resulting scientific publications, and indicate your *
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// * acceptance of all terms of the Geant4 Software license. *
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// ********************************************************************
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//
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//
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// $Id:$
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//
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// Class G4MTRandFlat
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//
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// Modified version with MT extensions
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// of corresponding CLHEP class RandFlat
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// --------------------------------------------------------------------
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#ifndef G4MTRandFlat_hh
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#define G4MTRandFlat_hh 1
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#include "G4MTHepRandom.hh"
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class G4MTRandFlat : public G4MTHepRandom
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{
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public:
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inline G4MTRandFlat ( CLHEP::HepRandomEngine& anEngine );
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inline G4MTRandFlat ( CLHEP::HepRandomEngine& anEngine, G4double width );
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inline G4MTRandFlat ( CLHEP::HepRandomEngine& anEngine, G4double a, G4double b );
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inline G4MTRandFlat ( CLHEP::HepRandomEngine* anEngine );
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inline G4MTRandFlat ( CLHEP::HepRandomEngine* anEngine, G4double width );
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inline G4MTRandFlat ( CLHEP::HepRandomEngine* anEngine, G4double a, G4double b );
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// These constructors should be used to instantiate a RandFlat
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// distribution object defining a local engine for it.
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// The static generator will be skipped using the non-static methods
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// defined below.
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// If the engine is passed by pointer the corresponding engine object
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// will be deleted by the RandFlat destructor.
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// If the engine is passed by reference the corresponding engine object
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// will not be deleted by the RandFlat destructor.
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virtual ~G4MTRandFlat();
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// Destructor
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// Static methods to shoot random values using the static generator
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static G4double shoot();
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static inline G4double shoot( G4double width );
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static inline G4double shoot( G4double a, G4double b );
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static inline G4long shootInt( G4long n );
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static inline G4long shootInt( G4long m, G4long n );
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static inline G4int shootBit();
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static void shootArray ( const G4int size, G4double* vect );
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static void shootArray ( const G4int size, G4double* vect,
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G4double lx, G4double dx );
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// Static methods to shoot random values using a given engine
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// by-passing the static generator.
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static inline G4double shoot ( CLHEP::HepRandomEngine* anEngine );
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static inline G4double shoot( CLHEP::HepRandomEngine* anEngine, G4double width );
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static inline G4double shoot( CLHEP::HepRandomEngine* anEngine,
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G4double a, G4double b );
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static inline G4long shootInt( CLHEP::HepRandomEngine* anEngine, G4long n );
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static inline G4long shootInt( CLHEP::HepRandomEngine* anEngine, G4long m, G4long n );
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static inline G4int shootBit( CLHEP::HepRandomEngine* );
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static inline void shootArray ( CLHEP::HepRandomEngine* anEngine,
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const G4int size, G4double* vect );
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static void shootArray ( CLHEP::HepRandomEngine* anEngine,
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const G4int size, G4double* vect,
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G4double lx, G4double dx );
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// Methods using the localEngine to shoot random values, by-passing
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// the static generator.
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inline G4double fire();
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inline G4double fire( G4double width );
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inline G4double fire( G4double a, G4double b );
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inline G4long fireInt( G4long n );
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inline G4long fireInt( G4long m, G4long n );
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inline G4int fireBit();
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void fireArray (const G4int size, G4double* vect);
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void fireArray (const G4int size, G4double* vect,
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G4double lx, G4double dx);
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G4double operator()();
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G4double operator()( G4double width );
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G4double operator()( G4double a, G4double b );
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private:
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// ShootBits generates an integer random number,
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// which is used by fireBit().
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// The number is stored in randomInt and firstUnusedBit
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inline void fireBits();
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static inline void shootBits();
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static inline void shootBits(CLHEP::HepRandomEngine*);
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// In MSB, the most significant bit of the integer random number
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// generated by ShootBits() is set.
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// Note:
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// the number of significant bits must be chosen so that
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// - an unsigned long can hold it
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// - and it should be less than the number of bits returned
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// by Shoot() which are not affected by precision problems
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// on _each_ architecture.
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// (Aim: the random generators should be machine-independent).
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static const unsigned long MSB;
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static const G4int MSBBits;
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// These two are set up in RandFlat.cc and need not be saved/restored
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unsigned long randomInt;
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unsigned long firstUnusedBit;
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static G4ThreadLocal unsigned long staticRandomInt;
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static G4ThreadLocal unsigned long staticFirstUnusedBit;
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CLHEP::HepRandomEngine* localEngine;
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G4bool deleteEngine;
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G4double defaultA;
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G4double defaultB;
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};
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#include "G4MTRandFlat.icc"
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#endif
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