analysing 1 640 480 30 FUTURE 1 1 1 1 1 1 1 1 1 5 5 5 5 5 5 5 5 5 0 -20 -400 -10 0 0 1000 4 2 1 2 0.5 2 1 2 0.5 1 500 1 2 2 1 500 1 2 2 1 500 1 2 2 1 500 1 2 2 1 500 1 2 2 4 500 2 2 1 500 1 2 2