ray <coord> <move-x> <move-y>
Array of coordinates of all spaces within a single "ray" of movement beyond <coord>. Specifically, it includes each square reached by taking successive steps from <coord> moving <move-x> squares horizontally and <move-y> vertically.
Positive or negative values of <move-x> indicate right or left, respectively. Positive or negative values of <move-y> indicate up or down, respectively.