Here's my directional grid that I'm trying to snap to, moving from the corners of each square (The crosses inside the squares indicate possible directions). I would like to click/touch any corner point and drag highlighting the traversed path.
[attachment=1:3kdzywd7][/attachment:3kdzywd7]
Example of a dragged path snapped to the grid:
[attachment=0:3kdzywd7][/attachment:3kdzywd7]
Any help would be greatly appreciated.