#include "scenes.h" #include "utils.h" const Hittable *random_scene(Arena *arena) { Hittable *world = hittable_create_hittable_list(arena); const Texture *checker = texture_create_checker_solid_color( (Color){0.2, 0.3, 0.1}, (Color){0.9, 0.9, 0.9}, 10.0, arena); const Material *ground_material = material_create_lambertian(checker, arena); const Hittable *ground_sphere = hittable_create_sphere( (Point3){0.0, -1000.0, 0.0}, 1000.0, ground_material, arena); hittable_list_add(&world->list, ground_sphere, arena); const Material *glass = material_create_dielectric(1.5, arena); for (int a = -11; a < 11; ++a) { for (int b = -11; b < 11; ++b) { double choose_material = random_double(); Point3 center = {a + 0.9 * random_double(), 0.2, b + 0.9 * random_double()}; if (vec3_length(point3_sub(center, (Point3){4.0, 0.2, 0.0})) > 0.9) { if (choose_material < 0.8) { const Material *material = material_create_lambertian_color( color_mul(color_random(), color_random()), arena); const Hittable *sphere = hittable_create_sphere(center, 0.2, material, arena); hittable_list_add(&world->list, sphere, arena); } else if (choose_material < 0.95) { const Material *material = material_create_metal_color( color_random_in_range(0.5, 1), random_double_in_range(0.5, 1.0), arena); const Hittable *sphere = hittable_create_sphere(center, 0.2, material, arena); hittable_list_add(&world->list, sphere, arena); } else { const Hittable *sphere = hittable_create_sphere(center, 0.2, glass, arena); hittable_list_add(&world->list, sphere, arena); } } } } const Material *lambertian = material_create_lambertian_color((Color){0.4, 0.2, 0.1}, arena); const Material *metal = material_create_metal_color((Color){0.7, 0.6, 0.5}, 0.0, arena); const Hittable *sphere1 = hittable_create_sphere((Point3){0.0, 1.0, 0.0}, 1.0, glass, arena); hittable_list_add(&world->list, sphere1, arena); const Hittable *sphere2 = hittable_create_sphere((Point3){-4.0, 1.0, 0.0}, 1.0, lambertian, arena); hittable_list_add(&world->list, sphere2, arena); const Hittable *sphere3 = hittable_create_sphere((Point3){4.0, 1.0, 0.0}, 1.0, metal, arena); hittable_list_add(&world->list, sphere3, arena); Hittable *bvh_root = hittable_create_bvh_node( world->list.objects, 0, world->list.size, 0.0, 1.0, arena); return bvh_root; } const Hittable *two_spheres(Arena *arena) { Hittable *world = hittable_create_hittable_list(arena); Texture *checker = texture_create_checker_solid_color( (Color){0.2, 0.3, 0.1}, (Color){0.9, 0.9, 0.9}, 10.0, arena); hittable_list_add( &world->list, hittable_create_sphere((Point3){0.0, -10.0, 0.0}, 10.0, material_create_lambertian(checker, arena), arena), arena); hittable_list_add( &world->list, hittable_create_sphere((Point3){0.0, 10.0, 0.0}, 10.0, material_create_lambertian(checker, arena), arena), arena); return world; } const Hittable *two_perlin_spheres(Arena *arena) { Hittable *world = hittable_create_hittable_list(arena); Texture *perlin_texture = texture_create_perlin_noise(4.0, PERLIN_DEFAULT_POINT_COUNT, arena); hittable_list_add( &world->list, hittable_create_sphere((Point3){0.0, -1000.0, 0.0}, 1000.0, material_create_lambertian(perlin_texture, arena), arena), arena); hittable_list_add( &world->list, hittable_create_sphere((Point3){0.0, 2.0, 0.0}, 2.0, material_create_lambertian(perlin_texture, arena), arena), arena); return world; } const Hittable *earth(Arena *arena) { Texture *earth_texture = texture_create_image("assets/earthmap.jpg", arena); Material *earth_surface = material_create_lambertian(earth_texture, arena); Hittable *globe = hittable_create_sphere((Point3){0.0, 0.0, 0.0}, 2.0, earth_surface, arena); return globe; } const Hittable *simple_light(Arena *arena) { Hittable *world = hittable_create_hittable_list(arena); Texture *perlin_texture = texture_create_perlin_noise(4.0, PERLIN_DEFAULT_POINT_COUNT, arena); hittable_list_add( &world->list, hittable_create_sphere((Point3){0.0, -1000.0, 0.0}, 1000.0, material_create_lambertian(perlin_texture, arena), arena), arena); hittable_list_add( &world->list, hittable_create_sphere((Point3){0.0, 2.0, 0.0}, 2.0, material_create_lambertian(perlin_texture, arena), arena), arena); Material *diffuse_light = material_create_diffuse_light_color((Color){4.0, 4.0, 4.0}, arena); hittable_list_add(&world->list, hittable_create_xy_rectangle(3.0, 5.0, 1.0, 3.0, -2.0, diffuse_light, arena), arena); return world; } const Hittable *cornell_box(Arena *arena) { Hittable *world = hittable_create_hittable_list(arena); Material *red = material_create_lambertian_color((Color){0.65, 0.05, 0.05}, arena); Material *white = material_create_lambertian_color((Color){0.73, 0.73, 0.73}, arena); Material *green = material_create_lambertian_color((Color){0.12, 0.45, 0.15}, arena); Material *light = material_create_diffuse_light_color((Color){15.0, 15.0, 15.0}, arena); hittable_list_add( &world->list, hittable_create_yz_rectangle(0, 555, 0, 555, 555, green, arena), arena); hittable_list_add(&world->list, hittable_create_yz_rectangle(0, 555, 0, 555, 0, red, arena), arena); hittable_list_add( &world->list, hittable_create_xz_rectangle(213, 343, 227, 332, 554, light, arena), arena); hittable_list_add( &world->list, hittable_create_xz_rectangle(0, 555, 0, 555, 0, white, arena), arena); hittable_list_add( &world->list, hittable_create_xz_rectangle(0, 555, 0, 555, 555, white, arena), arena); hittable_list_add( &world->list, hittable_create_xy_rectangle(0, 555, 0, 555, 555, white, arena), arena); Hittable *box1 = hittable_create_box((Point3){0, 0, 0}, (Point3){165, 330, 165}, white, arena); box1 = hittable_create_y_rotation(box1, 15, arena); box1 = hittable_create_translation(box1, (Vec3){265, 0, 295}, arena); hittable_list_add(&world->list, box1, arena); Hittable *box2 = hittable_create_box((Point3){0, 0, 0}, (Point3){165, 165, 165}, white, arena); box2 = hittable_create_y_rotation(box2, -18, arena); box2 = hittable_create_translation(box2, (Vec3){130, 0, 65}, arena); hittable_list_add(&world->list, box2, arena); return world; } const Hittable *cornell_box_smoke(Arena *arena) { Hittable *world = hittable_create_hittable_list(arena); Material *red = material_create_lambertian_color((Color){0.65, 0.05, 0.05}, arena); Material *white = material_create_lambertian_color((Color){0.73, 0.73, 0.73}, arena); Material *green = material_create_lambertian_color((Color){0.12, 0.45, 0.15}, arena); Material *light = material_create_diffuse_light_color((Color){7.0, 7.0, 7.0}, arena); hittable_list_add( &world->list, hittable_create_yz_rectangle(0, 555, 0, 555, 555, green, arena), arena); hittable_list_add(&world->list, hittable_create_yz_rectangle(0, 555, 0, 555, 0, red, arena), arena); hittable_list_add( &world->list, hittable_create_xz_rectangle(113, 443, 127, 432, 554, light, arena), arena); hittable_list_add( &world->list, hittable_create_xz_rectangle(0, 555, 0, 555, 0, white, arena), arena); hittable_list_add( &world->list, hittable_create_xz_rectangle(0, 555, 0, 555, 555, white, arena), arena); hittable_list_add( &world->list, hittable_create_xy_rectangle(0, 555, 0, 555, 555, white, arena), arena); Hittable *box1 = hittable_create_box((Point3){0, 0, 0}, (Point3){165, 330, 165}, white, arena); box1 = hittable_create_y_rotation(box1, 15, arena); box1 = hittable_create_translation(box1, (Vec3){265, 0, 295}, arena); hittable_list_add(&world->list, hittable_create_constant_medium_color( box1, 0.01, (Color){0.0, 0.0, 0.0}, arena), arena); Hittable *box2 = hittable_create_box((Point3){0, 0, 0}, (Point3){165, 165, 165}, white, arena); box2 = hittable_create_y_rotation(box2, -18, arena); box2 = hittable_create_translation(box2, (Vec3){130, 0, 65}, arena); hittable_list_add(&world->list, hittable_create_constant_medium_color( box2, 0.01, (Color){1.0, 1.0, 1.0}, arena), arena); return world; } const Hittable *complex_scene(Arena *arena) { Hittable *boxes1 = hittable_create_hittable_list(arena); Material *ground = material_create_lambertian_color((Color){0.48, 0.83, 0.53}, arena); const int boxes_per_side = 20; for (int i = 0; i < boxes_per_side; ++i) { for (int j = 0; j < boxes_per_side; ++j) { double w = 100.0; double x0 = -1000.0 + i * w; double y0 = 0.0; double z0 = -1000.0 + j * w; double x1 = x0 + w; double y1 = random_double_in_range(1, 101); double z1 = z0 + w; hittable_list_add(&boxes1->list, hittable_create_box((Point3){x0, y0, z0}, (Point3){x1, y1, z1}, ground, arena), arena); } } Hittable *objects = hittable_create_hittable_list(arena); hittable_list_add(&objects->list, hittable_create_bvh_node(boxes1->list.objects, 0, boxes1->list.size, 0, 1, arena), arena); Material *light = material_create_diffuse_light_color((Color){7, 7, 7}, arena); hittable_list_add( &objects->list, hittable_create_xz_rectangle(123, 423, 147, 412, 554, light, arena), arena); hittable_list_add(&objects->list, hittable_create_sphere((Point3){400, 400, 200}, 50, material_create_lambertian_color( (Color){0.7, 0.3, 0.1}, arena), arena), arena); hittable_list_add( &objects->list, hittable_create_sphere((Point3){260, 150, 45}, 50, material_create_dielectric(1.5, arena), arena), arena); hittable_list_add( &objects->list, hittable_create_sphere( (Point3){0, 150, 145}, 50, material_create_metal_color((Color){0.8, 0.8, 0.9}, 1.0, arena), arena), arena); Hittable *boundary = hittable_create_sphere((Point3){360, 150, 145}, 70, material_create_dielectric(1.5, arena), arena); hittable_list_add(&objects->list, boundary, arena); hittable_list_add(&objects->list, hittable_create_constant_medium_color( boundary, 0.2, (Color){0.2, 0.4, 0.9}, arena), arena); /* Ambient fog */ boundary = hittable_create_sphere( (Point3){0, 0, 0}, 5000, material_create_dielectric(1.5, arena), arena); hittable_list_add(&objects->list, hittable_create_constant_medium_color( boundary, 0.0001, (Color){1.0, 1.0, 1.0}, arena), arena); hittable_list_add( &objects->list, hittable_create_sphere( (Point3){400, 200, 400}, 100, material_create_lambertian( texture_create_image("assets/earthmap.jpg", arena), arena), arena), arena); hittable_list_add( &objects->list, hittable_create_sphere((Point3){220, 280, 300}, 80, material_create_lambertian( texture_create_perlin_noise( 0.1, PERLIN_DEFAULT_POINT_COUNT, arena), arena), arena), arena); Hittable *boxes2 = hittable_create_hittable_list(arena); Material *white = material_create_lambertian_color((Color){0.73, 0.73, 0.73}, arena); int ns = 1000; for (int i = 0; i < ns; ++i) { hittable_list_add(&boxes2->list, hittable_create_sphere(point3_random_in_range(0, 165), 10, white, arena), arena); } hittable_list_add( &objects->list, hittable_create_translation( hittable_create_y_rotation( hittable_create_bvh_node(boxes2->list.objects, 0, boxes2->list.size, 0, 1, arena), 15, arena), (Vec3){-100, 270, 395}, arena), arena); return objects; }