- Fix -- Fixed usage of the term "unit cube" for a cube of diameter two (#1555)

// Common Headers

#include "color.h"

#include "interval.h"

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ C++

#include "ray.h"

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ C++

#include <cmath>

#include <cstdlib>

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ C++

#include <iostream>

}

inline double random_double() {

// Returns a random real in [0,1).

return std::rand() / (RAND_MAX + 1.0);

}

static vec3 random() {

return vec3(random_double(), random_double(), random_double());

}

}

inline vec3 random_in_unit_sphere() {

while (true) {

auto p = vec3::random(-1,1);

}

inline vec3 random_unit_vector() {

return unit_vector(random_in_unit_sphere());

}

}

inline vec3 random_on_hemisphere(const vec3& normal) {

vec3 on_unit_sphere = random_unit_vector();

if (dot(on_unit_sphere, normal) > 0.0) // In the same hemisphere as the normal

};

class lambertian : public material {

public:

lambertian(const color& albedo) : albedo(albedo) {}

}

bool near_zero() const {

// Return true if the vector is close to zero in all dimensions.

auto s = 1e-8;

}

inline vec3 reflect(const vec3& v, const vec3& n) {

return v - 2*dot(v,n)*n;

}

};

class metal : public material {

public:

metal(const color& albedo) : albedo(albedo) {}

}

inline vec3 refract(const vec3& uv, const vec3& n, double etai_over_etat) {

auto cos_theta = std::fmin(dot(-uv, n), 1.0);

vec3 r_out_perp = etai_over_etat * (uv + cos_theta*n);

};

class dielectric : public material {

public:

dielectric(double refraction_index) : refraction_index(refraction_index) {}

}

inline vec3 random_in_unit_disk() {

while (true) {

auto p = vec3(random_double(-1,1), random_double(-1,1), 0);

hittable_list world;

auto ground_material = make_shared<lambertian>(color(0.5, 0.5, 0.5));

world.add(make_shared<sphere>(point3(0,-1000,0), 1000, ground_material));

camera cam;

cam.aspect_ratio = 16.0 / 9.0;

cam.image_width = 1200;

cam.samples_per_pixel = 500;

- Jason Stone

- [JC-ProgJava](https://github.com/JC-ProgJava)

- Jean Buckley

- Joey Cho

- [John Kilpatrick](https://github.com/rjkilpatrick)

- [Kaan Eraslan](https://github.com/D-K-E)