text: #ifndef ENGINE_H
  #define ENGINE_H
  
  #include "../model/model.h"
  
  namespace hawkings {
  
  class Engine
  {
  public: 
      Engine(float gravity);
      ~Engine();
  
      void update(unsigned long timeMs);
  
  protected: 
      float gravity;
      unsigned long timeMs;
  
  private:
      
  };
  
  }
  
  #endif
  