include/EvtGenBase/EvtRandom.hh

0001
0002 /***********************************************************************
0003 * Copyright 1998-2020 CERN for the benefit of the EvtGen authors       *
0004 *                                                                      *
0005 * This file is part of EvtGen.                                         *
0006 *                                                                      *
0007 * EvtGen is free software: you can redistribute it and/or modify       *
0008 * it under the terms of the GNU General Public License as published by *
0009 * the Free Software Foundation, either version 3 of the License, or    *
0010 * (at your option) any later version.                                  *
0011 *                                                                      *
0012 * EvtGen is distributed in the hope that it will be useful,            *
0013 * but WITHOUT ANY WARRANTY; without even the implied warranty of       *
0014 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the        *
0015 * GNU General Public License for more details.                         *
0016 *                                                                      *
0017 * You should have received a copy of the GNU General Public License    *
0018 * along with EvtGen.  If not, see <https://www.gnu.org/licenses/>.     *
0019 ***********************************************************************/
0020
0021 #ifndef EVTRANDOM_HH
0022 #define EVTRANDOM_HH
0023
0024 class EvtRandomEngine;
0025
0026 class EvtRandom {
0027   public:
0028     static double Flat();
0029     static double Flat( double max );
0030     static double Flat( double min, double max );
0031
0032     //generate unit Gaussian
0033     static double Gaussian();
0034
0035     static double random();
0036
0037     //This class does not take ownership of the random engine;
0038     //the caller needs to make sure that the engine is not
0039     //destroyed.
0040     static void setRandomEngine( EvtRandomEngine* randomEngine );
0041
0042   private:
0043     static EvtRandomEngine* _randomEngine;
0044 };
0045
0046 #endif