anchor.diff:                                     last-update-time))
                     (dt (/ (* elapsed-time 1.0)
                            internal-time-units-per-second)))
  +             (setf last-update-time (get-internal-real-time))
                (glaw:with-timestep (dt *max-frame-time*)
                  (update dt)
                  (draw)
  -               (glop:swap-buffers win))
  -             (setf last-update-time (get-internal-real-time))))))
  +               (glop:swap-buffers win))))))
     (glaw:shutdown-content-manager))
   
   ;; Using SDL
  
positive.code:                               last-update-time))
               (dt (/ (* elapsed-time 1.0)
                      internal-time-units-per-second)))
        (sdl:with-events (:poll)
          (:quit-event () t)
          (:key-down-event (:key key :unicode code :scancode scancode)
  
negative.code:         (:idle ()
                 (update dt)
                 (draw)
                 (sdl:update-display)))))))
  