TRandom3.h

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// @(#)root/mathcore:$Id$
// Author: Peter Malzacher   31/08/99
 
/*************************************************************************
 * Copyright (C) 1995-2000, Rene Brun and Fons Rademakers.               *
 * All rights reserved.                                                  *
 *                                                                       *
 * For the licensing terms see $ROOTSYS/LICENSE.                         *
 * For the list of contributors see $ROOTSYS/README/CREDITS.             *
 *************************************************************************/
 
#ifndef ROOT_TRandom3
#define ROOT_TRandom3
 
 
 
//////////////////////////////////////////////////////////////////////////
//                                                                      //
// TRandom3                                                             //
//                                                                      //
// random number generator class: Mersenne Twister                      //
//                                                                      //
//////////////////////////////////////////////////////////////////////////
 
#include "TRandom.h"
 
class TRandom3 : public TRandom {
 
private:
   UInt_t   fMt[624];
   Int_t    fCount624;
 
public:
   TRandom3(UInt_t seed=4357);
   ~TRandom3() override;
    /// Return one element of the generator state used to generate the random numbers.
    /// Note that it is not the seed of the generator that was used in the SetSeed function and 
    /// the full state (624 numbers) is required to define the generator and have a reproducible output.
    UInt_t    GetSeed() const override { return fMt[fCount624 % 624];}
   using TRandom::Rndm;
    Double_t  Rndm( ) override;
    void      RndmArray(Int_t n, Float_t *array) override;
    void      RndmArray(Int_t n, Double_t *array) override;
    void      SetSeed(ULong_t seed=0) override;
   virtual const UInt_t *GetState() const { return fMt; }
 
   ClassDefOverride(TRandom3,2)  //Random number generator: Mersenne Twister
};
 
R__EXTERN TRandom *gRandom;
 
#endif