text: #pragma once
  #include <vector>
  #include "Shape.h"
  struct World
  {
      World() {}
      World(const std::vector<Sphere> spheres) : spheres(spheres) {}
      void AddSphere(Sphere sphere)
      {
          spheres.emplace_back(sphere);
      }
      std::vector<Sphere> spheres;
  };