Interface PathOptions

Cells to treat as blocked beyond the terrain (other creatures, usually).

Passed per call rather than held, because who is standing where changes every turn and a cached path is a monster walking through its neighbour.

how many levels up one step may climb; defaults to 1, the ordinary stair or ramp

The map's heights, when climbing matters. A step from one cell to the next is allowed when the destination rises no more than climb above the start; going down is always allowed, the way stepping off a ledge is. Needs heights to mean anything on its own.

4 for cardinal moves only, 8 to allow diagonals