actor.cpp

class Actor {
public:
	Actor() = default;
	virtual ~Actor() = default;
	virtual void update() = 0;
	virtual void draw() = 0;

	void kill() { enable = false; }
	bool isEnabled() const { return enable; }
private:
	bool enable = true;
};

template<typename Type>
class ActorManager {
public:
	ActorManager() = default;
	virtual ~ActorManager() = default;

	void add(std::shared_ptr<Type> actor) {
		actors.push_back(actor);
	}
	void clear() {
		actors.clear();
	}
	int size() {
		return actors.size();
	}
	virtual void update(Game* game) {
		for (auto& actor : actors) {
			actor->update(game);
		}
		Erase_if(actors, [](std::shared_ptr<Type> actor) { return !actor->isEnabled(); });
	}
	virtual void draw(Game* game) {
		for (auto& actor : actors) {
			actor->draw(game);
		}
	}
	
	typename std::list<std::shared_ptr<Type>>::const_iterator begin() { return actors.begin(); }
	typename std::list<std::shared_ptr<Type>>::const_iterator end() { return actors.end(); }
private:
	std::list<std::shared_ptr<Type>> actors;
};