UniRandom.hpp

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// This file is part of GranOO, a workbench for DEM simulation.
//
// Author(s)    : - Damien Andre       IRCER/UNILIM, Limoges France
//                  <damien.andre@unilim.fr>
//                - Jean-luc Charles   Arts et Metiers ParisTech, CNRS, I2M, Bordeaux France
//                  <jean-luc.charles@ensam.eu>
//                - Jeremie Girardot   Arts et Metiers ParisTech, CNRS, I2M, Bordeaux France
//                  <jeremie.girardot@ensam.eu>
//                - Cedric Hubert      LAMIH/UPHF, Valenciennes France
//                  <cedric.hubert@uphf.fr>
//                - Ivan Iordanoff     Arts et Metiers ParisTech, CNRS, I2M, Bordeaux France
//                  <ivan.iordanoff@ensam.eu>
//
// Copyright (C) 2008-2019 D. Andre, JL. Charles, J. Girardot, C. Hubert, I. Iordanoff
//
// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
// GNU General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with this program.  If not, see <http://www.gnu.org/licenses/>.
//
 
 
#ifndef _GranOO_Math_Function_UniRandom_hpp_
#define _GranOO_Math_Function_UniRandom_hpp_
 
#include <random>
#include "GranOO3/Math/FunctionT.hpp"
 
namespace GranOO3
{
  namespace Math
  {
    //---------------------------------------//
    // UniRandom: f(x) = a inside [min, max] //
    //---------------------------------------//
    class UniRandom : public FunctionT<UniRandom>
    {
    public:
      static std::string class_ID() {return "UniRandom";}
 
      UniRandom();
      UniRandom(const std::string& symbol, const std::string desc = "");
      UniRandom(const double min, const double max);
      ~UniRandom();
 
      void set_min_max(double min, double max);
      void set(double min, double max);
 
      double operator()();
      double operator()(const double& min, const double& max);
 
    private:
      std::default_random_engine _generator;
      double                     _min;
      double                     _max;
    };
 
    inline void
    UniRandom::set_min_max(double min, double max) {
      AssertMsg(min < max, "UniRandom::set_min_max   -> min, max values incorrect");
      _min = min;
      _max = max;
    }
 
  }
}
#endif