#pragma once

#include "math.h"
#include "sphere.h"
#include "colour.h"
#include "material.h"
#include "hittable_list.h"

class world : public hittable_list
{
public:
    static world* close_glass_sphere();
    static world* orb_field();

    friend colour trace(const world& world, const ray& ray, int depth);
};