66 lines
1.7 KiB
Python
66 lines
1.7 KiB
Python
#!/usr/bin/env python
|
|
|
|
# This file is part of ROBOTGAME
|
|
#
|
|
# ROBOTGAME is free software: you can redistribute it and/or modify it under the
|
|
# terms of the GNU General Public License as published by the Free Software
|
|
# Foundation, either version 3 of the License, or (at your option) any later
|
|
# version.
|
|
#
|
|
# ROBOTGAME is distributed in the hope that it will be useful, but WITHOUT ANY
|
|
# WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR
|
|
# A PARTICULAR PURPOSE. See the GNU General Public License for more details.
|
|
#
|
|
# You should have received a copy of the GNU General Public License along with
|
|
# ROBOTGAME. If not, see <http://www.gnu.org/licenses/>.
|
|
#
|
|
# ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' '
|
|
#
|
|
# direction.py
|
|
# --------------------
|
|
# date created : Tue Aug 7 2012
|
|
# copyright : (C) 2012 Niels G. W. Serup
|
|
# maintained by : Niels G. W. Serup <ns@metanohi.name>
|
|
|
|
"""Directions."""
|
|
|
|
class Direction(object):
|
|
@staticmethod
|
|
def next_pos(pos):
|
|
raise NotImplementedError
|
|
|
|
class Up(Direction):
|
|
@staticmethod
|
|
def next_pos(pos):
|
|
x, y = pos
|
|
return x, y - 1
|
|
|
|
class Right(Direction):
|
|
@staticmethod
|
|
def next_pos(pos):
|
|
x, y = pos
|
|
return x + 1, y
|
|
|
|
class Down(Direction):
|
|
@staticmethod
|
|
def next_pos(pos):
|
|
x, y = pos
|
|
return x, y + 1
|
|
|
|
class Left(Direction):
|
|
@staticmethod
|
|
def next_pos(pos):
|
|
x, y = pos
|
|
return x - 1, y
|
|
|
|
succ = {Up: Right,
|
|
Right: Down,
|
|
Down: Left,
|
|
Left: Up}.__getitem__
|
|
|
|
pred = {Right: Up,
|
|
Down: Right,
|
|
Left: Down,
|
|
Up: Left}.__getitem__
|
|
|