1 files changed, 14 insertions, 5 deletions

diff --git a/src/main.cpp b/src/main.cpp
index f7c4b0e..62ef981 100644
--- a/src/main.cpp
+++ b/src/main.cpp
@@ -6,7 +6,10 @@
 color ground_color { 1.0, 1.0, 1.0 };
 color sky_color { 0.5, 0.7, 1.0 };
 
-color ray_color(ray& r, const hittable& world) {
+color ray_color(ray& r, const hittable& world, uint32_t depth) {
+    if (depth <= 0) {
+        return color{};
+    }
     sphere sphere { { 0.0, 0.0, -1.0 }, 0.5 };
 
     auto unit_dir = r.direction.unit();
@@ -15,8 +18,13 @@ color ray_color(ray& r, const hittable& world) {
     auto c = lerp(ground_color, sky_color, t);
 
     struct hit_info info;
-    if (world.hit(r, 0.0, infinity, info)) {
-        c = 0.5 * (info.normal + vec3{ 1.0, 1.0, 1.0});
+    if (world.hit(r, 0.001, infinity, info)) {
+        // point3 target = info.point + info.normal + random_in_unit_sphere();
+        // point3 target = info.point + info.normal + random_unit_vector();
+        point3 target = info.point + info.normal + random_in_hemisphere(info.normal);
+        ray reflect { info.point, target - info.point };
+        c = 0.5 * ray_color(reflect, world, depth - 1);
+        // c = 0.5 * (target - info.point + vec3{ 1.0, 1.0, 1.0 });
     }
 
     return c;
@@ -25,9 +33,10 @@ color ray_color(ray& r, const hittable& world) {
 int main() {
     // Image dimensions
     const double aspect_ratio = 16.0 / 9.0;
-    const size_t width = 400;
+    const size_t width = 1920;
     const size_t height = width / aspect_ratio;
     const uint32_t samples_per_pixel = 100;
+    const uint32_t max_depth = 100;
 
     camera camera { {}, aspect_ratio, 1.0 };
 
@@ -51,7 +60,7 @@ int main() {
                 auto v = double(row + randd()) / (height - 1.0);
                 auto ray = camera.get_ray(u, v);
 
-                pixel_color += ray_color(ray, world);
+                pixel_color += ray_color(ray, world, max_depth);
             }
 
             write_color(std::cout, pixel_color, samples_per_pixel);