1 files changed, 108 insertions, 0 deletions
diff --git a/src/utils.cpp b/src/utils.cpp
index e7aef1d..9fb5872 100644
--- a/src/utils.cpp
+++ b/src/utils.cpp
@@ -4,6 +4,8 @@
 #include <cstring>
 #include <iostream>
 
+#include "material.hpp"
+
 std::vector<uint8_t> get_shader_code(const char* path) {
     FILE* f = fopen(path, "rb");
 
@@ -29,3 +31,109 @@ std::vector<uint8_t> get_shader_code(const char* path) {
 
     return shader_code;
 }
+
+color ground_color { 1.0, 1.0, 1.0 };
+color sky_color { 0.5, 0.7, 1.0 };
+
+void random_scene(sphere *world) {
+    material ground_material = { { 0.5, 0.5, 0.5 } };
+    ground_material.type = MATERIAL_TYPE::LAMBERTIAN;
+    world[0] = sphere{ { 0,-1000,0 }, ground_material, 1000 };
+
+    uint32_t world_sphere_index = 1;
+
+    for (int a = -11; a < 11; a++) {
+        for (int b = -11; b < 11; b++) {
+            auto choose_mat = randd();
+            point3 center(a + 0.9 * randd(), 0.2, b + 0.9 * randd());
+
+            if ((center - point3{ 4, 0.2, 0 }).length() > 0.9) {
+                material sphere_material = {};
+
+                if (choose_mat < 0.8) {
+                    // diffuse
+                    sphere_material.albedo = color::random() * color::random();
+                    sphere_material.type = MATERIAL_TYPE::LAMBERTIAN;
+                } else if (choose_mat < 0.95) {
+                    // metal
+                    sphere_material.albedo = color::random(0.5, 1);
+                    sphere_material.fuzz = randd(0, 0.5);
+                    sphere_material.type = MATERIAL_TYPE::METAL;
+                } else {
+                    // glass
+                    sphere_material.ior = 1.5;
+                    sphere_material.type = MATERIAL_TYPE::DIELECTRIC;
+                }
+
+                world[world_sphere_index] = { center, sphere_material, 0.2 };
+                world_sphere_index++;
+            }
+        }
+    }
+
+    material material1 = {};
+    material1.ior = 1.5;
+    material1.type = MATERIAL_TYPE::DIELECTRIC;
+    world[world_sphere_index] = { { 0, 1, 0 }, material1, 1.0 };
+
+    material material2 = {};
+    material2.albedo = color{ 0.4, 0.2, 0.1 };
+    material2.type = MATERIAL_TYPE::LAMBERTIAN;
+    world[world_sphere_index + 1] = { { -4, 1, 0 }, material2, 1.0 };
+
+    material material3 = {};
+    material3.albedo = color{ 0.7, 0.6, 0.5 };
+    material3.fuzz = 0.0;
+    material3.type = MATERIAL_TYPE::METAL;
+    world[world_sphere_index + 2] = { { 4, 1, 0 }, material3, 1.0 };
+}
+
+struct input_data create_inputs(uint32_t width, uint32_t height) {
+    // Image dimensions
+    // const float aspect_ratio = 16.0 / 9.0;
+    const float aspect_ratio = 1;
+
+    const uint32_t samples_per_pixel = 1;
+    const uint32_t max_depth = 50;
+
+    const vec3 camera_position{ 13.0, 2.0, 3.0 };
+    const vec3 camera_target{ 0.0, 0.0, 0.0 };
+    const float aperture = 0.1;
+    const float distance_to_focus = 10;
+    camera camera { camera_position, camera_target, 20.0, aspect_ratio, aperture, distance_to_focus };
+
+    struct input_data inputs = {
+        .sky_color = sky_color,
+        .ground_color = ground_color,
+
+        .cam = camera,
+
+        .spheres = {},
+
+        .max_bounce = max_depth,
+        .samples_per_pixel = samples_per_pixel,
+        .width = width,
+        .height = height
+    };
+
+    // Random numbers pools
+    for (size_t rand_number_index = 0; rand_number_index < 1000; rand_number_index += 2) {
+        inputs.random_offset[rand_number_index] = randd();
+        inputs.random_offset[rand_number_index + 1] = randd();
+    }
+
+    for (size_t rand_number_index = 0; rand_number_index < 1000; rand_number_index += 2) {
+        vec3 random_unit_disk = random_in_unit_disk();
+        inputs.random_disk[rand_number_index] = random_unit_disk.x;
+        inputs.random_disk[rand_number_index + 1] = random_unit_disk.y;
+    }
+
+    for (size_t rand_number_index = 0; rand_number_index < 1000; rand_number_index++) {
+        inputs.random_in_sphere[rand_number_index] = random_in_unit_sphere();
+    }
+
+    // World hittable objects
+    random_scene(inputs.spheres);
+
+    return inputs;
+}