raytracer.h

//
//  raytracer.h
//  raytracer
//
//  Created by Gabriel de Jesus on 27/03/21.
//

#ifndef raytracer_h
#define raytracer_h

#include <cmath>
#include <limits>
#include <memory>
#include <cstdlib>
#include <random>

using std::shared_ptr;
using std::make_shared;
using std::sqrt;

const double infinity = std::numeric_limits<double>::infinity();
const double pi = 3.1415926535897932385;

inline double degrees_to_radians(double degrees) {
    return degrees * pi / 180.0;
}

// Returns random real in [0, 1)
inline double random_double() {
    //return rand() / (RAND_MAX + 1.0);
    static std::uniform_real_distribution<double> distribution(0.0, 1.0);
    static std::mt19937 generator;
    return distribution(generator);
}

// Returns random real in [min, max)
inline double random_double(double min, double max) {
    //return min + (max - min)*random_double();
    static std::uniform_real_distribution<double> distribution(min, max);
    static std::mt19937 generator;
    return distribution(generator);
}

inline double clamp(double x, double min, double max) {
    if (x < min) return min;
    if (x > max) return max;
    return x;
}

#include "ray.h"
#include "vec3.h"

#endif /* raytracer_h */