#ifndef RTWEEKEND_H
#define RTWEEKEND_H

#include <math.h>
#include <memory>
#include <pthread.h>
#include <unistd.h>
#include "timer.hpp"
#include "random.h"

#define FAST_RANDOM 1
#ifdef FAST_RANDOM
pcg32_random_t pcg = { 0x853c49e6748fea9bULL, 0xda3e39cb94b95bdbULL };
#define rand() pcg32_random_r(&pcg)
#endif

/* Utility functions */
inline float degrees_to_radians(float d)
{
    return d * M_PI / 180;
}

/* Returns a float in the range [0,1) */
inline float random_float()
{
    return rand() * (1.0 / RAND_MAX);
}

/* Returns a float in the range [min,max) */
inline float random_float(float min, float max)
{
    return min + (max-min) * random_float();
}

/* Clamps a value between [min,max] */
inline float clamp(float v, float min, float max)
{
    return v < min ? min : v > max ? max : v;
}

/* Common internal headers */

#include "ray.hpp"
#include "vec3.hpp"

struct material;

/* Common data structures */

struct hit_record {
    point3 p;
    vec3 normal;
    std::shared_ptr<material> mat_ptr;
    float t;
    bool front_face;

    inline void set_face_normal(const ray& r, const vec3& outward_normal)
    {
        front_face = dot(r.direction, outward_normal) < 0;
        normal = front_face ? outward_normal : -outward_normal;
    }    
};




#endif