Implemented AABB for Spheres

RayTracer/shape/Sphere.cpp

@@ -42,4 +42,8 @@ std::shared_ptr<cam::Hit> Sphere::intersect(const cam::Ray& r) const {
 		return nullptr;
 	}
 }
+util::AxisAlignedBoundingBox Sphere::bounds() const {
+	return util::AxisAlignedBoundingBox(util::Vec3(-radius),
+	                                    util::Vec3(radius));
+}
 }  // namespace shapes

RayTracer/shape/Sphere.h

@@ -7,6 +7,7 @@ class Sphere : public Shape {
    public:
 	Sphere(float radius, const std::shared_ptr<material::Material>& material);
 	std::shared_ptr<cam::Hit> intersect(const cam::Ray& r) const override;
+	util::AxisAlignedBoundingBox bounds() const override;
 
    private:
 	std::shared_ptr<material::Material> material;