Walks down column x starting at y for at most maxDist rows (inclusive of the start). Returns the first solid y in range, or null when the range is exhausted with no hit.
x
y
maxDist
null
Returns null if maxDist is non-positive.
Walks down column
xstarting atyfor at mostmaxDistrows (inclusive of the start). Returns the first solid y in range, ornullwhen the range is exhausted with no hit.Returns
nullifmaxDistis non-positive.