PhotosRandom.h

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//****************************************************************************
//*                   This file is part of PandaRoot.                        *
//*                                                                          *
//*            PandaRoot is distributed under the terms of the               *
//*              GNU General Public License (GPL) version 3,                 *
//*                 copied verbatim in the file "LICENSE".                   *
//*                                                                          *
//*  Copyright (C) 2006 - 2024 FAIR GmbH and copyright holders of PandaRoot  *
//*     The copyright holders are listed in the file "COPYRIGHTHOLDERS".     *
//*               The authors are listed in the file "AUTHORS".              *
//****************************************************************************

//****************************************************************************
//*                   This file is part of PandaRoot.                        *
//*                                                                          *
//*            PandaRoot is distributed under the terms of the               *
//*              GNU General Public License (GPL) version 3,                 *
//*                 copied verbatim in the file "LICENSE".                   *
//*                                                                          *
//*  Copyright (C) 2006 - 2024 FAIR GmbH and copyright holders of PandaRoot  *
//*     The copyright holders are listed in the file "COPYRIGHTHOLDERS".     *
//*               The authors are listed in the file "AUTHORS".              *
//****************************************************************************

#ifndef _PhotosRandom_included_
#define _PhotosRandom_included_

namespace Photospp {

class PhotosRandom {
 public:
  /* Change the seed. Default is s1=1802 and s2=9373
     These values must be in range [0,31327] and [0,30080] respectively */
  static void setSeed(int s1, int s2);

  /* Initialization routine. Must be called at least once before
     the generator can be used. */
  static void initialize();

  /* Uniform distribution between 0 and 1 */
  static double randomReal();

 protected:
  static bool init;
  static int iseed[2];
  static int i97;
  static int j97;
  static double uran[97];
  static double cran;
  static const double cdran;
  static const double cmran;
};

} // namespace Photospp
#endif