GY-63_MS5611/libraries/Prandom/Prandom.h
2023-11-16 10:34:37 +01:00

74 lines
1.9 KiB
C++

#pragma once
//
// FILE: Prandom.h
// AUTHOR: Rob Tillaart
// VERSION: 0.1.6
// PURPOSE: Arduino library for random numbers with Python Random interface
// The underlying pseudo-random number generator is a
// Multiply-with-carry method invented by George Marsaglia.
// URL: https://github.com/RobTillaart/Prandom
// https://docs.python.org/3/library/random.html
// https://www.pcg-random.org/
#include "Arduino.h"
#define PRANDOM_LIB_VERSION (F("0.1.6"))
class Prandom
{
public:
Prandom();
Prandom(uint32_t s);
void seed();
void seed(uint32_t s, uint32_t t = 2); // Marsaglia need 2 seeds, but 1 will work too
// integer methods
//
uint32_t getrandbits(uint8_t n);
uint32_t randrange(uint32_t stop);
uint32_t randrange(uint32_t start, uint32_t stop, uint32_t step = 1);
// randint is inclusive end value
uint32_t randint(uint32_t start, uint32_t stop) { return randrange(start, stop + 1); };
// real distributions
//
float random(const float top = 1.0);
float uniform(float lo, float hi);
float triangular(float lo = 0, float hi = 1.0, float mid = 0.5);
float normalvariate(float mu = 0, float sigma = 1.0);
float lognormvariate(float mu = 0, float sigma = 1.0);
float gauss(float mu = 0, float sigma = 1.0);
float expovariate(float lambda);
float gammavariate(float alpha, float beta);
float betavariate(float alpha, float beta);
float paretovariate(float alpha);
float weibullvariate(float alpha, float beta);
// Circular distributions
//
// mu is mean angle in radians
// kappa is concentration parameter, 0 -> uniform.
float vonmisesvariate(float mu, float kappa = 0);
private:
uint32_t _rndTime();
uint32_t _rnd(uint32_t n);
// Marsaglia 'constants'
uint32_t _m_w = 1;
uint32_t _m_z = 2;
uint32_t __random();
};
// -- END OF FILE --