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cool pink spheres

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ktyl 2022-06-02 23:09:50 +01:00
parent f1269753f9
commit 3adf674871
2 changed files with 67 additions and 54 deletions
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121
src/main.cpp
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@ -8,18 +8,21 @@
#include <iostream> #include <iostream>
const double ASPECT_RATIO = 32.0 / 9.0; const double ASPECT_RATIO = 16.0 / 9.0;
const int WIDTH = 800; const int WIDTH = 1920;
const int HEIGHT = static_cast<int>(WIDTH / ASPECT_RATIO); const int HEIGHT = static_cast<int>(WIDTH / ASPECT_RATIO);
const int SAMPLES_PER_PIXEL = 32; const int SAMPLES_PER_PIXEL = 32;
const int MAX_DEPTH = 16; const int MAX_DEPTH = 5;
const colour pink(0.973, 0.784, 0.863);
const colour grey(0.133, 0.133, 0.133);
colour ray_colour(const ray& r, const hittable& world, int depth) colour ray_colour(const ray& r, const hittable& world, int depth)
{ {
hit_record rec; hit_record rec;
if (depth <= 0) if (depth <= 0)
{ {
return colour(0,0,0); return grey;
} }
if (world.hit(r, 0.001, infinity, rec)) if (world.hit(r, 0.001, infinity, rec))
@ -32,69 +35,77 @@ colour ray_colour(const ray& r, const hittable& world, int depth)
return attenuation * ray_colour(scattered, world, depth-1); return attenuation * ray_colour(scattered, world, depth-1);
} }
return colour(0,0,0); return grey;
} }
vec3 unit_direction = unit_vector(r.direction()); vec3 unit_direction = unit_vector(r.direction());
auto t = 0.5 * (unit_direction.y() + 1.0); auto t = 0.5 * (unit_direction.y() + 1.0) + 0.5;
auto a = colour(0.8, 0.7, 1.0); return lerp(grey, pink, t);
auto b = colour(1.0, 1.0, 1.0);
return lerp(a, b, t);
} }
hittable_list random_scene() hittable_list random_scene()
{ {
hittable_list world; hittable_list world;
auto ground_material = make_shared<lambertian>(colour(0.5, 0.5, 0.5));
world.add(make_shared<sphere>(point3(0,-1000,0), 1000, ground_material));
for (int a = -11; a < 11; a++) //auto ground_material = make_shared<lambertian>(pink);
{ //world.add(make_shared<sphere>(point3(0,-1000,0), 1000, ground_material));
for (int b = -11; b < 11; b++)
{
auto choose_mat = random_double();
point3 centre(a + 0.9*random_double(), 0.2, b + 0.9*random_double());
if ((centre - point3(4, 0.2, 0)).length() > 0.9) //for (int a = -11; a < 11; a++)
{ //{
shared_ptr<material> sphere_material; // for (int b = -11; b < 11; b++)
// {
// auto choose_mat = random_double();
// point3 centre(a + 0.9*random_double(), 0.2, b + 0.9*random_double());
if (choose_mat < 0.8) // if ((centre - point3(4, 0.2, 0)).length() > 0.9)
{ // {
// diffuse // shared_ptr<material> sphere_material;
auto albedo = colour::random() * colour::random();
sphere_material = make_shared<lambertian>(albedo); // if (choose_mat < 0.8)
world.add(make_shared<sphere>(centre, 0.2, sphere_material)); // {
} // // diffuse
else if (choose_mat < 0.95) // //auto albedo = colour::random() * colour::random();
{ // sphere_material = make_shared<lambertian>(pink);
// metal // world.add(make_shared<sphere>(centre, 0.2, sphere_material));
auto albedo = colour::random(0.5, 1); // }
auto fuzz = random_double(0, 0.5); // else if (choose_mat < 0.95)
sphere_material = make_shared<metal>(albedo, fuzz); // {
world.add(make_shared<sphere>(centre, 0.2, sphere_material)); // // metal
} // auto fuzz = random_double(0, 0.5);
else // sphere_material = make_shared<metal>(pink, fuzz);
{ // world.add(make_shared<sphere>(centre, 0.2, sphere_material));
// glass // }
sphere_material = make_shared<dielectric>(1.5); // else
world.add(make_shared<sphere>(centre,0.2, sphere_material)); // {
} // // glass
} // sphere_material = make_shared<dielectric>(1.5);
} // world.add(make_shared<sphere>(centre,0.2, sphere_material));
} // }
// }
// }
//}
auto material1 = make_shared<dielectric>(1.5); auto material1 = make_shared<dielectric>(1.5);
world.add(make_shared<sphere>(point3(0, 1, 0), 1.0, material1)); world.add(make_shared<sphere>(point3(0, 0, 0), 3.0, material1));
auto material2 = make_shared<lambertian>(colour(0.4, 0.2, 0.1)); //auto material2 = make_shared<lambertian>(pink);
world.add(make_shared<sphere>(point3(-4, 1, 0), 1.0, material2)); //world.add(make_shared<sphere>(point3(-4, 1, 0), 1.0, material2));
auto material3 = make_shared<metal>(colour(0.7, 0.6, 0.5), 0.0); auto material3 = make_shared<metal>(pink, 0.5);
world.add(make_shared<sphere>(point3(4, 1, 0), 1.0, material3)); int sphere_count = 3;
for (int i = 0; i < sphere_count; i++)
{
float a = 6.28 * (float)i/sphere_count - 100.0;
float r = 8.0;
float x = r*sin(a);
float y = 2.0*cos(a);
float z = r*cos(a);
point3 pos(x,y,z);
world.add(make_shared<sphere>(pos, 4.0, material3));
}
return world; return world;
} }
@ -105,13 +116,15 @@ int main()
hittable_list world = random_scene(); hittable_list world = random_scene();
point3 lookfrom(13,2,3); auto dist_to_target = 10.0;
auto dist_to_focus = dist_to_target + 1.0;
auto cam_y = 1.0;
point3 lookfrom(0,cam_y,-dist_to_target);
point3 lookat(0,0,0); point3 lookat(0,0,0);
vec3 vup(0,1,0); vec3 vup(0,1,0);
auto dist_to_focus = 10.0; auto aperture = 0.5;
auto aperture = 0.1;
camera cam(lookfrom, lookat, vup, 20, ASPECT_RATIO, aperture, dist_to_focus); camera cam(lookfrom, lookat, vup, 47, ASPECT_RATIO, aperture, dist_to_focus);
for (int j = HEIGHT - 1; j >= 0; --j) for (int j = HEIGHT - 1; j >= 0; --j)
{ {