landmark-update-score-in-direction

landmark-update-score-in-direction is a compiled Lisp function in `landmark.el'.

(landmark-update-score-in-direction LEFT RIGHT SQUARE DX DY DVAL)

Update scores for all squares in the qtuples in range.
That is, those between the LEFTth square and the RIGHTth after SQUARE,
along the DX, DY direction, considering that DVAL has been added on SQUARE.