Fixed a few bugs and added laser mirror room generator.

robotgame/logic/colourboxes.py

@@ -23,6 +23,10 @@
 #          copyright : (C) 2012 Niels G. W. Serup
 #      maintained by : Niels G. W. Serup <ns@metanohi.name>
 
+"""
+Colour boxes.
+"""
+
 import random
 
 def generate_colour_boxes(nwells, nboxes):

robotgame/logic/direction.py

@@ -53,9 +53,7 @@ class Left(Direction):
         x, y = pos
         return x - 1, y
 
-all_directions = set((Up, Left, Down, Right))
-
-succ = lambda d: all_directions[(all_directions.index(d) + 1) % 4]
-pred = lambda d: all_directions[(all_directions.index(d) - 1) % 4]
-
-isDirection = lambda obj: obj in (Up, Left, Down, Right)
+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__

robotgame/logic/lasermirror.py

@@ -0,0 +1,116 @@
+#!/usr/bin/env python
+# -*- coding: utf-8 -*-
+
+# 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/>.
+#
+# ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' '
+#
+#                         lasermirror.py
+#                     --------------------
+#       date created : Tue Aug 7 2012
+#          copyright : (C) 2012 Niels G. W. Serup
+#      maintained by : Niels G. W. Serup <ns@metanohi.name>
+
+"""
+Management of lasers in rooms of mirrors and targets.
+"""
+
+from __future__ import print_function
+import math
+import random
+import itertools
+from robotgame.logic.direction import *
+import robotgame.logic.rollingstone as rstone
+
+class Mirror(object):
+    pass
+
+class Lever(object):
+    pass
+
+class Target(object):
+    pass
+
+def generate_simple_playfield(nmirrors):
+    """
+    Generate a completable 12x12 playfield where:
+      * there are four laser sources, one in each corner
+        + the one in the upper left corner (0, 0) starts in (0, -1) heading down
+        + the one in the upper right corner (11, 0) starts in (12, 0), heading left
+        + the one in the lower right corner (11, 11) starts in (11, 12), heading up
+        + the one in the lower left corner (0, 11) starts in (-1, 11), heading right
+      * there are four laser targets
+      * there are nmirrors mirrors
+      * there are nmirrors levers
+      * all levers are at the wall
+
+    Return playfield : {(x, y): Target | Mirror | rstone.Blocker | Lever}
+    """
+    playfield = {(4, 4): Target,
+                 (7, 4): Target,
+                 (4, 7): Target,
+                 (7, 7): Target,
+                 (5, 5): rstone.Blocker,
+                 (5, 6): rstone.Blocker,
+                 (6, 5): rstone.Blocker,
+                 (6, 6): rstone.Blocker,
+                 }
+    succs = lambda d: d
+    source_direc = Up
+    nlevers = nmirrors
+    for missing in range(4, 0, -1):
+        nm = nmirrors / missing
+        nmirrors -= nm
+        stone_playfield, _ = rstone.generate_simple_playfield(
+            5, 5, nm, 0, False, False)
+        for pos, direc in stone_playfield.items():
+            if direc is not None and pos >= (0, 0):
+                playfield[_adjust(source_direc, 12 - 1, 12 - 1, *pos)] = Mirror
+        succs = (lambda s: lambda d: succ(s(d)))(succs)
+        source_direc = succ(source_direc)
+
+    emptys = set(itertools.product(range(12), range(12))) \
+        - set(playfield.keys())
+    emptys = set([(0, y) for y in range(12)]
+                 + [(11, y) for y in range(12)]
+                 + [(x, 0) for x in range(12)]
+                 + [(x, 11) for x in range(12)])
+    for _ in range(nlevers):
+        if not emptys:
+            raise Exception("Not enough space for all levers!")
+        pos = random.choice(list(emptys))
+        playfield[pos] = Lever
+        emptys.remove(pos)
+    return playfield
+
+def _adjust(source_direc, w, h, x, y):
+    return {
+        Up:    lambda x, y: (x, y),
+        Right: lambda x, y: (w - y, x),
+        Down:  lambda x, y: (w - x, h - y),
+        Left:  lambda x, y: (y, h - x),
+        }[source_direc](x, y)
+    
+def print_playfield(playfield, width, height, hide_directions=False):
+    text = [['·' for _ in range(width)] for _ in range(height)]
+    for (x, y), val in playfield.items():
+        if isDirection(val) and hide_directions:
+            continue
+        text[y][x] = '%' if val is rstone.Blocker \
+            else 'x' if val is Mirror \
+            else 'L' if val is Lever \
+            else 'T' if val is Target else 'N'
+    print('\n'.join(''.join(line) for line in text))
+

robotgame/logic/rollingstone.py

@@ -30,9 +30,9 @@ direction-changing turns. Also has a pseudo-random playfield generator.
 
 from __future__ import print_function
 import math
+import random
 import itertools
 from robotgame.logic.direction import *
-import random
 
 class Blocker(object):
     pass
@@ -70,7 +70,8 @@ def reaches_goal(playfield, width, height, max_steps, start_pos, goal_pos):
     return False
 
 
-def generate_simple_playfield(width, height, nturns, nstones):
+def generate_simple_playfield(width, height, nturns, nstones,
+                              do_transpose=None, start_inside=True):
     """
     Generate a completable playfield where:
       * the starting position is in the upper left corner
@@ -78,7 +79,7 @@ def generate_simple_playfield(width, height, nturns, nstones):
       * the playfield is completable in nturns or less
       * the playfield has at most nstones stones
 
-    Return (playfield : {(x, y): Direction | Blocker},
+    Return (playfield : {(x, y): Direction | Blocker | None},
             steps : int)
     where (x, y) : (int, int)
 
@@ -95,11 +96,13 @@ def generate_simple_playfield(width, height, nturns, nstones):
         nturns = min(2 * (width - 1), 2 * (height - 1) - 1)
         min_width, min_height = _min_play_size(nturns)
 
+    if do_transpose is None:
         do_transpose = random.choice((True, False))
     if do_transpose:
         width, height = height, width
 
-    turns, stones = [((0, 0), None)], []
+    turns = [((0, 0), None)]
+    stones = []
     x, y = (0, 0)
     not_allowed_y = []
     offset_x = 0
@@ -110,6 +113,7 @@ def generate_simple_playfield(width, height, nturns, nstones):
             turns.append(((x, height - 1), Right))
             break
         elif missing == 0:
+            turns[-1] = ((width - 1, turns[-1][0][1]), Down)
             break
         else:
             allowed = set(range(0, height)) - set(not_allowed_y)
@@ -129,6 +133,8 @@ def generate_simple_playfield(width, height, nturns, nstones):
             turns.append(((x1, y1), None))
             x, y = x1, y1
     turns.append(((width - 1, height - 1), None))
+    if not start_inside:
+        del turns[0]
 
     if do_transpose:
         turns[:] = [((y, x), {
@@ -181,7 +187,7 @@ def print_playfield(playfield, width, height, hide_directions):
     for (x, y), val in playfield.items():
         if isDirection(val) and hide_directions:
             continue
-        text[y][x] = '%' if val == Blocker else repr(val).rsplit('.', 1)[1][0] \
+        text[y][x] = '%' if val is Blocker else repr(val).rsplit('.', 1)[1][0] \
             if isDirection(val) else 'G'
     print('\n'.join(''.join(line) for line in text))
 

tests/lasermirror_tests.py

@@ -0,0 +1,15 @@
+
+from __future__ import print_function
+import unittest
+from robotgame.logic.lasermirror import *
+from robotgame.logic.direction import *
+
+
+class LaserMirrorTest(unittest.TestCase):
+    def test_playfield_generation(self):
+        print()
+        playfield = generate_simple_playfield(13)
+        print_playfield(playfield, 12, 12)
+
+if __name__ == '__main__':
+    unittest.main()

tests/rollingstone_tests.py

@@ -35,5 +35,11 @@ class RollingStoneTest(unittest.TestCase):
         self.assertTrue(
             reaches_goal(playfield, 10, 10, steps, (0, 0), (9, 9)))
 
+        print()
+        playfield, steps = generate_simple_playfield(10, 10, 4, 11)
+        print_playfield(playfield, 10, 10, True)
+        self.assertTrue(
+            reaches_goal(playfield, 10, 10, steps, (0, 0), (9, 9)))
+        
 if __name__ == '__main__':
     unittest.main()