dxFunc :: Point -> Point -> Int32
dxFunc end_pt start_pt = (fst end_pt) - (fst start_pt)
dxFunc :: Point -> Point -> Int32
dxFunc end_pt start_pt = (fst end_pt) - (fst start_pt)
dxFunc end_pt start_pt = (fst end_pt) - (fst start_pt)