Add hittable interface and hit infos on hit

1 files changed, 12 insertions, 20 deletions

diff --git a/src/main.cpp b/src/main.cpp
index e2ef071..f6b3012 100644
--- a/src/main.cpp
+++ b/src/main.cpp
@@ -1,31 +1,22 @@
 #include <iostream>
 
-#include "color.hpp"
-#include "vec3.hpp"
-#include "ray.hpp"
+#include "rt.hpp"
+#include "hittable_list.hpp"
 
 color ground_color { 1.0, 1.0, 1.0 };
 color sky_color { 0.5, 0.7, 1.0 };
 
-bool hit_sphere(const point3& sphere_pos, double sphere_radius, const ray& r) {
-    // Vector from the ray origin to sphere position
-    vec3 origin_center = r.origin - sphere_pos;
-    double a = r.direction.dot(r.direction);
-    double b = 2.0 * r.direction.dot(origin_center);
-    double c = origin_center.dot(origin_center) - sphere_radius * sphere_radius;
-    double discriminant = b * b - 4.0 * a * c;
+color ray_color(ray& r, const hittable& world) {
+    sphere sphere { { 0.0, 0.0, -1.0 }, 0.5 };
 
-    return (discriminant > 0);
-}
-
-color ray_color(ray& r) {
     auto unit_dir = r.direction.unit();
     auto t = (unit_dir.y + 1.0) * 0.5;
 
     auto c = lerp(ground_color, sky_color, t);
 
-    if (hit_sphere(point3{ 0.0, 0.0, -1.0 }, .5, r)) {
-        c = color { 1.0, 0.0, 0.0 };
+    struct hit_info info;
+    if (world.hit(r, 0.0, infinity, info)) {
+        c = 0.5 * (info.normal + vec3{ 1.0, 1.0, 1.0});
     }
 
     return c;
@@ -36,10 +27,11 @@ int main() {
     const double aspect_ratio = 16.0 / 9.0;
     const size_t width = 400;
     const size_t height = width / aspect_ratio;
-    // const size_t width = 256;
-    // const size_t height = 256;
 
-    // const double aspect_ratio = width / height;
+    // World hittable objects
+    hittable_list world {};
+    world.add(std::make_shared<sphere>(point3(0,0,-1), 0.5));
+    world.add(std::make_shared<sphere>(point3(0,-100.5,-1), 100));
 
     // Viewport dimensions
     const double viewport_height = 2.0;
@@ -78,7 +70,7 @@ int main() {
 
             ray ray { eye_pos, direction };
 
-            write_color(std::cout, ray_color(ray));
+            write_color(std::cout, ray_color(ray, world));
             // write_color(std::cout, color(direction.unit().y, direction.unit().y, direction.unit().y));
             // write_color(std::cout, color(y.y, y.y, y.y));
         }