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