Walks on a path tile are stored in a 16 bit number, which contains the following information.

 

- bit 12..15 Normal (0) or centered (1) path tile walk.

- bit 8..11  The entry edge.

- bit 4..7   The exit edge.

- bit 0..3   The number of 90 degrees turns.

 

A normal walk uses the 'offset' of the person to make it move in the right area

of the tile (and the opposing direction uses the left area of the tile. A

centered walk is like a normal walk, but the person is gradually moved onto the

center of the path, to form a queue.

 

Within a tile, a person enters from the entry edge, and leaves at the exit

edge. (With 0=NE, 1=SE, 2=SW, and 3=NW for all edges.) If the walk at the tile

requires a change in direction, one or more 90 degrees turns are made around

the center of the tile (while respecting the offset in case of normal tile

walks), in counter-clockwise direction.