random.h

一个用MATLAB语言编写的摄像机标定工具箱,内容丰富

//
// random.h
//
// $Id: random.h,v 1.1.1.1 2001/02/28 00:28:38 cstolte Exp $
//

#ifndef SGL_RANDOM_H
#define SGL_RANDOM_H

#include <sgl/defs.h>

class Vector2;
class Vector3;

class Random {
public:
    Random();                 // initialize from clock
    Random(int seed);         // initialize from user seed
    virtual ~Random();
    
    void init(int seed);

//
//      Marsaglia's subtract-with-borrow generator
//      (The Annals of Applied Probability, 1991, 1(3), 462-480)
//	  from code by J. Reeds 91/11/19.
//
//	Augmented by Bays & Durham's output shuffling.
//
    int int31();
    int simpleInt31();

//
//	uniform random integer from 0 to n-1
//
    int integer(int n);

//
//	uniform distribution in [0, 1.0)
//
    double uniform();
    double uniform() const { return ((Random *)this)->uniform(); }

//
//	uniform points in unit disk
//      (first version returns xp^2 + yp^2)
//
    double disk(double *xp, double *yp);
    Vector2 disk();

//
//	normal distribution
//
    double normal(double sigma, double mean);

//
//	random 2D unit vector
//
    void vector2(double *x, double *y);
    Vector2 vector2();

//
//	random 3D unit vector
//
    void vector3(double *x, double *y, double *z);
    Vector3 vector3();

    double exponential(double mu);
    double gamma(double a);
    double beta(double a, double b);
    double chi(double nu);
    double Fdist(double nu1, double nu2);
    double tdist(double nu);
    int geometric(double p);
    int binomial(double p, int trials);
    int poisson(double mu);

protected:
//
//  physically-random initial state
//
    int vec[48];
    int feed, tap, borrow;
    int V[571], Y;
};

#endif // SGL_RANDOM_H