Function advent_of_code_2022::day_8::mark_visible_trees

fn mark_visible_trees(
    (origin_y, origin_x): (usize, usize),
    (dy, dx): (isize, isize),
    trees_grid: &Grid,
    visibility_grid: &mut Grid
)

For a given row or column start or end step forwards or backwards marking those that can be seen from the starting position