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# layout.py
# ---------
# Licensing Information: You are free to use or extend these projects for
# educational purposes provided that (1) you do not distribute or publish
# solutions, (2) you retain this notice, and (3) you provide clear
# attribution to UC Berkeley, including a link to http://ai.berkeley.edu.
#
# Attribution Information: The Pacman AI projects were developed at UC Berkeley.
# The core projects and autograders were primarily created by John DeNero
# (denero@cs.berkeley.edu) and Dan Klein (klein@cs.berkeley.edu).
# Student side autograding was added by Brad Miller, Nick Hay, and
# Pieter Abbeel (pabbeel@cs.berkeley.edu).
import util
from util import manhattanDistance
from game import Grid
# from capsule import DefaultCapsule
import os
import random
import itertools
VISIBILITY_MATRIX_CACHE = {}
PROB_FOOD_LEFT = 0.4
PROB_LEFT_TOP = 0.6
PROB_OPPOSITE_CORNERS = 0.7
PROB_FOOD_RED = 0.3
PROB_GHOST_RED = 0.6
PROB_BOTH_TOP = PROB_LEFT_TOP * (1 - PROB_OPPOSITE_CORNERS)
PROB_BOTH_BOTTOM = (1 - PROB_LEFT_TOP) * (1 - PROB_OPPOSITE_CORNERS)
PROB_ONLY_LEFT_TOP = PROB_LEFT_TOP * PROB_OPPOSITE_CORNERS
PROB_ONLY_LEFT_BOTTOM = (1 - PROB_LEFT_TOP) * PROB_OPPOSITE_CORNERS
class Layout:
"""
A Layout manages the static information about the game board.
"""
def __init__(self, layoutText=None, seed=None, width=None, height=None, vpi=False):
if layoutText:
self.width = len(layoutText[0])
self.height= len(layoutText)
self.walls = Grid(self.width, self.height, False)
self.redWalls = Grid(self.width, self.height, False)
self.blueWalls = Grid(self.width, self.height, False)
self.food = Grid(self.width, self.height, False)
self.capsules = []
self.agentPositions = []
self.numGhosts = 0
self.processLayoutText(layoutText)
self.layoutText = layoutText
self.totalFood = len(self.food.asList())
elif vpi:
layoutText = generateVPIHuntersBoard(seed)
self.__init__(layoutText)
else:
layoutText = generateRandomHuntersBoard(seed, width, height)
self.__init__(layoutText)
def getNumGhosts(self):
return self.numGhosts
def initializeVisibilityMatrix(self):
global VISIBILITY_MATRIX_CACHE
if reduce(str.__add__, self.layoutText) not in VISIBILITY_MATRIX_CACHE:
from game import Directions
vecs = [(-0.5,0), (0.5,0),(0,-0.5),(0,0.5)]
dirs = [Directions.NORTH, Directions.SOUTH, Directions.WEST, Directions.EAST]
vis = Grid(self.width, self.height, {Directions.NORTH:set(), Directions.SOUTH:set(), Directions.EAST:set(), Directions.WEST:set(), Directions.STOP:set()})
for x in range(self.width):
for y in range(self.height):
if self.walls[x][y] == False:
for vec, direction in zip(vecs, dirs):
dx, dy = vec
nextx, nexty = x + dx, y + dy
while (nextx + nexty) != int(nextx) + int(nexty) or not self.walls[int(nextx)][int(nexty)] :
vis[x][y][direction].add((nextx, nexty))
nextx, nexty = x + dx, y + dy
self.visibility = vis
VISIBILITY_MATRIX_CACHE[reduce(str.__add__, self.layoutText)] = vis
else:
self.visibility = VISIBILITY_MATRIX_CACHE[reduce(str.__add__, self.layoutText)]
def isWall(self, pos):
x, col = pos
return self.walls[x][col]
def getRandomLegalPosition(self):
x = random.choice(range(self.width))
y = random.choice(range(self.height))
while self.isWall( (x, y) ):
x = random.choice(range(self.width))
y = random.choice(range(self.height))
return (x,y)
def getRandomCorner(self):
poses = [(1,1), (1, self.height - 2), (self.width - 2, 1), (self.width - 2, self.height - 2)]
return random.choice(poses)
def getFurthestCorner(self, pacPos):
poses = [(1,1), (1, self.height - 2), (self.width - 2, 1), (self.width - 2, self.height - 2)]
dist, pos = max([(manhattanDistance(p, pacPos), p) for p in poses])
return pos
def isVisibleFrom(self, ghostPos, pacPos, pacDirection):
row, col = [int(x) for x in pacPos]
return ghostPos in self.visibility[row][col][pacDirection]
def __str__(self):
return "\n".join(self.layoutText)
def deepCopy(self):
return Layout(self.layoutText[:])
def processLayoutText(self, layoutText):
"""
Coordinates are flipped from the input format to the (x,y) convention here
The shape of the maze. Each character
represents a different type of object.
% - Wall
. - Food
o - Capsule
G - Ghost
P - Pacman
B - Blue Wall
R - Red Wall
Other characters are ignored.
"""
maxY = self.height - 1
for y in range(self.height):
for x in range(self.width):
layoutChar = layoutText[maxY - y][x]
self.processLayoutChar(x, y, layoutChar)
self.agentPositions.sort()
self.agentPositions = [ ( i == 0, pos) for i, pos in self.agentPositions]
def processLayoutChar(self, x, y, layoutChar):
if layoutChar == '%':
self.walls[x][y] = True
elif layoutChar == 'B':
self.blueWalls[x][y] = True
elif layoutChar == 'R':
self.redWalls[x][y] = True
elif layoutChar == '.':
self.food[x][y] = True
elif layoutChar == 'o':
self.capsules.append(DefaultCapsule(x, y))
elif layoutChar == 'P':
self.agentPositions.append( (0, (x, y) ) )
elif layoutChar in ['G']:
self.agentPositions.append( (1, (x, y) ) )
self.numGhosts += 1
elif layoutChar in ['1', '2', '3', '4']:
self.agentPositions.append( (int(layoutChar), (x,y)))
self.numGhosts += 1
def getLayout(name, back = 2):
if name.endswith('.lay'):
layout = tryToLoad('layouts/' + name)
if layout == None: layout = tryToLoad(name)
else:
layout = tryToLoad('layouts/' + name + '.lay')
if layout == None: layout = tryToLoad(name + '.lay')
if layout == None and back >= 0:
curdir = os.path.abspath('.')
os.chdir('..')
layout = getLayout(name, back -1)
os.chdir(curdir)
return layout
def tryToLoad(fullname):
if(not os.path.exists(fullname)): return None
f = open(fullname)
try: return Layout([line.strip() for line in f])
finally: f.close()
def generateVPIHuntersBoard(seed=None):
width = 11
height = 11
foodHouseLeft = util.flipCoin(PROB_FOOD_LEFT)
layoutTextGrid = [[' ' for _ in xrange(width)] for _ in xrange(height)]
layoutTextGrid[0] = ['%' for _ in xrange(width)]
layoutTextGrid[-1] = layoutTextGrid[0][:]
for i in xrange(height):
layoutTextGrid[i][0] = layoutTextGrid[i][-1] = '%'
possibleLocations = pickPossibleLocations(width, height)
# (foodX, foodY), (ghostX, ghostY) = tuple(random.sample(possibleLocations, 2))
bottomLeft, topLeft, bottomRight, topRight = tuple(possibleLocations)
foodX, foodY = topLeft
ghostX, ghostY = topRight
if not util.flipCoin(PROB_FOOD_LEFT):
(foodX, foodY), (ghostX, ghostY) = (ghostX, ghostY), (foodX, foodY)
layoutTextGrid[-foodY-1][foodX] = '.'
layoutTextGrid[-ghostY-1][ghostX] = 'G'
for foodWallX, foodWallY in buildHouseAroundCenter(foodX, foodY):
if util.flipCoin(PROB_FOOD_RED):
layoutTextGrid[-foodWallY-1][foodWallX] = 'R'
else:
layoutTextGrid[-foodWallY-1][foodWallX] = 'B'
for ghostWallX, ghostWallY in buildHouseAroundCenter(ghostX, ghostY):
if util.flipCoin(PROB_GHOST_RED):
layoutTextGrid[-ghostWallY-1][ghostWallX] = 'R'
else:
layoutTextGrid[-ghostWallY-1][ghostWallX] = 'B'
layoutTextGrid[5][5] = 'P'
layoutTextRowList = [''.join(row) for row in layoutTextGrid]
return layoutTextRowList
def generateRandomHuntersBoard(seed=None, width=None, height=None):
"""Note that this is constructing a string, so indexing is [-y-1][x] rather than [x][y]"""
random.seed(seed)
leftHouseTop = util.flipCoin(PROB_LEFT_TOP)
if not width or not height:
width = random.randrange(11, 20, 4)
height = random.randrange(11, 16, 4)
layoutTextGrid = [[' ' for _ in xrange(width)] for _ in xrange(height)]
layoutTextGrid[0] = ['%' for _ in xrange(width)]
layoutTextGrid[-1] = layoutTextGrid[0][:]
for i in xrange(height):
layoutTextGrid[i][0] = layoutTextGrid[i][-1] = '%'
possibleLocations = pickPossibleLocations(width, height)
# (foodX, foodY), (ghostX, ghostY) = tuple(random.sample(possibleLocations, 2))
bottomLeft, topLeft, bottomRight, topRight = tuple(possibleLocations)
if leftHouseTop:
foodX, foodY = topLeft
ghostX, ghostY = bottomRight if util.flipCoin(PROB_OPPOSITE_CORNERS) else topRight
else:
foodX, foodY = bottomLeft
ghostX, ghostY = topRight if util.flipCoin(PROB_OPPOSITE_CORNERS) else bottomRight
if not util.flipCoin(PROB_FOOD_LEFT):
(foodX, foodY), (ghostX, ghostY) = (ghostX, ghostY), (foodX, foodY)
layoutTextGrid[-foodY-1][foodX] = '.'
layoutTextGrid[-ghostY-1][ghostX] = 'G'
for foodWallX, foodWallY in buildHouseAroundCenter(foodX, foodY):
if util.flipCoin(PROB_FOOD_RED):
layoutTextGrid[-foodWallY-1][foodWallX] = 'R'
else:
layoutTextGrid[-foodWallY-1][foodWallX] = 'B'
for ghostWallX, ghostWallY in buildHouseAroundCenter(ghostX, ghostY):
if util.flipCoin(PROB_GHOST_RED):
layoutTextGrid[-ghostWallY-1][ghostWallX] = 'R'
else:
layoutTextGrid[-ghostWallY-1][ghostWallX] = 'B'
layoutTextGrid[-2][1] = 'P'
layoutTextRowList = [''.join(row) for row in layoutTextGrid]
return layoutTextRowList
def pickPossibleLocations(width, height):
# return list(itertools.product(range(3, width - 3, 4), range(3, height - 3, 4)))
return [(3, 3), (3, height - 4), (width - 4, 3), (width - 4, height - 4)]
def buildHouseAroundCenter(x, y):
return set(itertools.product([x-1, x, x+1], [y-1, y, y+1])) - {(x, y), (x, y-1)}
if __name__ == '__main__':
lay = Layout(generateVPIHuntersBoard())
print lay