Implement BVH

hittableList.h

@@ -1,11 +1,15 @@
 #ifndef HITTABLE_LIST_H
 #define HITTABLE_LIST_H
 
+#include "aabb.h"
 #include "hittable.h"
 #include "rayTracer.h"
 #include <vector>
 
 class hittableList : public hittable {
+    private:
+        aabb bBox;
+
     public: 
         std::vector<shared_ptr<hittable>> objects;
 
@@ -20,6 +24,7 @@ class hittableList : public hittable {
 
         void add(shared_ptr<hittable> object) {
             objects.push_back(object);
+            bBox = aabb(bBox, object->boundingBox());
         }
 
         bool hit (const ray& r, interval rayT, hitRecord& rec) const override {
@@ -38,6 +43,10 @@ class hittableList : public hittable {
 
             return hitAnything;
         }
+
+        aabb boundingBox() const override { 
+            return bBox;
+        }
 };
 
 #endif