def outer(self):
"""
The smallest rectangle circumscribed by the trapezoid.
Returns:
tuple[int]: (upper_left_x, upper_left_y, bottom_right_x, bottom_right_y).
"""
return trapezoid2area(self.corner, pad=-5)
def inner(self):
"""
The largest rectangle inscribed in trapezoid.
Returns:
tuple[int]: (upper_left_x, upper_left_y, bottom_right_x, bottom_right_y).
"""
return trapezoid2area(self.corner, pad=5)
def local_to_area(local_grid, pad=0):
result = []
for local in local_grid:
# Predict the position of grid after swipe.
# Swipe should ends there, to prevent treating swipe as click.
area = area_offset((0, 0, 1, 1), offset=-map_vector)
corner = local.grid2screen(area2corner(area))
area = trapezoid2area(corner, pad=pad)
result.append(area)
return result