gistfile1.cpp

struct Agent {
  Agent (const Vector3 &initialPosition);
  
  void LookAt (const Vector3 &target);
  void MoveTo (const Vector3 &target);

  private:
    Vector3 position;
    Vector3 facing;
};

struct IController {
  virtual void Update (float elapsed) = 0;
};

struct HumanController : IController {
  HumanController (Agent & agent, InputSystem &inputSystem);

  void Update (float elapsed);

  private:
    InputSystem & inputSystem;
};

struct AiController : IController {
  AiController (Agent & agent, const Script &script);

  void Update (float elapsed);

  private:
    Script & script;
};