a-robots-conundrum/robotgame/logic/direction.py

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2012-08-07 13:19:31 +02:00
#!/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
@staticmethod
def to_str():
raise NotImplementedError
@staticmethod
def from_sakse(p):
return {(0, -1): Up,
(0, 1): Down,
(-1, 0): Left,
(1, 0): Right}[p]
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class Up(Direction):
@staticmethod
def next_pos(pos):
x, y = pos
return x, y - 1
@staticmethod
def to_str():
return 'up'
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class Right(Direction):
@staticmethod
def next_pos(pos):
x, y = pos
return x + 1, y
@staticmethod
def to_str():
return 'right'
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class Down(Direction):
@staticmethod
def next_pos(pos):
x, y = pos
return x, y + 1
@staticmethod
def to_str():
return 'down'
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class Left(Direction):
@staticmethod
def next_pos(pos):
x, y = pos
return x - 1, y
@staticmethod
def to_str():
return 'left'
all_directions = [Up, Right, Down, Left]
_sp = lambda n: lambda d: all_directions[(all_directions.index(d) + n) % 4]
succ, pred = _sp(1), _sp(-1)
isDirection = all_directions.__contains__