source: issm/trunk-jpl/src/c/shared/Random/randomgenerator.h@ 26578

/*!\file: randomgenerator.h
 * \brief prototypes for randomgenerator.h
 */

#ifndef _RANDOMGENERATOR_H_
#define _RANDOMGENERATOR_H_

#undef M_PI
#define M_PI 3.141592653589793238462643

namespace rdngen{
  class uniform_distribution_rnd
  {

      private:

        unsigned int a;       //multiplier of the linear congruential generator
        unsigned int c;       //increment of the linear congruential generator
        unsigned int m;       // modulo of the linear congruential generator
        unsigned int _seed;   // seed value
        double lbound;        // lower bound of uniform distribution
        double ubound;        // upper bound of uniform distribution

      public:

        /*constructors, destructors: */
        uniform_distribution_rnd();
        uniform_distribution_rnd(double a_1, double a_2);
        ~uniform_distribution_rnd();

        void seed( unsigned int s );
        unsigned int get_seed();
        double generator();

  };

  class normal_distribution_rnd
  {

      private:
        unsigned int _seed; // seed value
        double mean;        // mean value
        double sdev;        // standard deviation

      public:

        /*constructors, destructors: */
        normal_distribution_rnd();
        normal_distribution_rnd(double m,double s);
        ~normal_distribution_rnd();

        void seed( unsigned int s );
        double generator();

  };

}
#endif //ifndef _RANDOMGENERATOR_H_