A flow field is a 50x50 grid (representing a room), representing viable directions
to travel to reach a particular target (or targets). A mono flow field only stores
a single direction for each tile, so we represent this as 4 bits of an unsigned
integer (0 for no direction, 1 for TOP, etc.).
A flow field is a 50x50 grid (representing a room), representing viable directions to travel to reach a particular target (or targets). A mono flow field only stores a single direction for each tile, so we represent this as 4 bits of an unsigned integer (0 for no direction, 1 for TOP, etc.).