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For computer controller car guidance in BC Racers, each "block" on the floor had a set of direction bits (3 bit for 8 directions), showing which way to aim for. It worked quite well, as from any point on the map, the "arrows" would guide the car in the right direction... ie. off the side of the track the arrows would guide the car towards the middle racing line.
with the added inertia, this worked a treat
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