149 lines
5.6 KiB
Python
149 lines
5.6 KiB
Python
# layout.py
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# ---------
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# Licensing Information: You are free to use or extend these projects for
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# educational purposes provided that (1) you do not distribute or publish
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# solutions, (2) you retain this notice, and (3) you provide clear
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# attribution to UC Berkeley, including a link to http://ai.berkeley.edu.
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#
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# Attribution Information: The Pacman AI projects were developed at UC Berkeley.
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# The core projects and autograders were primarily created by John DeNero
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# (denero@cs.berkeley.edu) and Dan Klein (klein@cs.berkeley.edu).
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# Student side autograding was added by Brad Miller, Nick Hay, and
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# Pieter Abbeel (pabbeel@cs.berkeley.edu).
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from util import manhattanDistance
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from game import Grid
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import os
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import random
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VISIBILITY_MATRIX_CACHE = {}
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class Layout:
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"""
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A Layout manages the static information about the game board.
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"""
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def __init__(self, layoutText):
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self.width = len(layoutText[0])
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self.height= len(layoutText)
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self.walls = Grid(self.width, self.height, False)
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self.food = Grid(self.width, self.height, False)
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self.capsules = []
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self.agentPositions = []
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self.numGhosts = 0
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self.processLayoutText(layoutText)
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self.layoutText = layoutText
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self.totalFood = len(self.food.asList())
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# self.initializeVisibilityMatrix()
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def getNumGhosts(self):
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return self.numGhosts
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def initializeVisibilityMatrix(self):
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global VISIBILITY_MATRIX_CACHE
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if reduce(str.__add__, self.layoutText) not in VISIBILITY_MATRIX_CACHE:
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from game import Directions
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vecs = [(-0.5,0), (0.5,0),(0,-0.5),(0,0.5)]
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dirs = [Directions.NORTH, Directions.SOUTH, Directions.WEST, Directions.EAST]
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vis = Grid(self.width, self.height, {Directions.NORTH:set(), Directions.SOUTH:set(), Directions.EAST:set(), Directions.WEST:set(), Directions.STOP:set()})
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for x in range(self.width):
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for y in range(self.height):
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if self.walls[x][y] == False:
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for vec, direction in zip(vecs, dirs):
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dx, dy = vec
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nextx, nexty = x + dx, y + dy
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while (nextx + nexty) != int(nextx) + int(nexty) or not self.walls[int(nextx)][int(nexty)] :
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vis[x][y][direction].add((nextx, nexty))
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nextx, nexty = x + dx, y + dy
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self.visibility = vis
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VISIBILITY_MATRIX_CACHE[reduce(str.__add__, self.layoutText)] = vis
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else:
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self.visibility = VISIBILITY_MATRIX_CACHE[reduce(str.__add__, self.layoutText)]
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def isWall(self, pos):
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x, col = pos
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return self.walls[x][col]
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def getRandomLegalPosition(self):
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x = random.choice(range(self.width))
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y = random.choice(range(self.height))
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while self.isWall( (x, y) ):
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x = random.choice(range(self.width))
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y = random.choice(range(self.height))
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return (x,y)
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def getRandomCorner(self):
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poses = [(1,1), (1, self.height - 2), (self.width - 2, 1), (self.width - 2, self.height - 2)]
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return random.choice(poses)
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def getFurthestCorner(self, pacPos):
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poses = [(1,1), (1, self.height - 2), (self.width - 2, 1), (self.width - 2, self.height - 2)]
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dist, pos = max([(manhattanDistance(p, pacPos), p) for p in poses])
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return pos
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def isVisibleFrom(self, ghostPos, pacPos, pacDirection):
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row, col = [int(x) for x in pacPos]
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return ghostPos in self.visibility[row][col][pacDirection]
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def __str__(self):
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return "\n".join(self.layoutText)
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def deepCopy(self):
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return Layout(self.layoutText[:])
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def processLayoutText(self, layoutText):
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"""
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Coordinates are flipped from the input format to the (x,y) convention here
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The shape of the maze. Each character
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represents a different type of object.
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% - Wall
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. - Food
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o - Capsule
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G - Ghost
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P - Pacman
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Other characters are ignored.
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"""
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maxY = self.height - 1
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for y in range(self.height):
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for x in range(self.width):
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layoutChar = layoutText[maxY - y][x]
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self.processLayoutChar(x, y, layoutChar)
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self.agentPositions.sort()
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self.agentPositions = [ ( i == 0, pos) for i, pos in self.agentPositions]
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def processLayoutChar(self, x, y, layoutChar):
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if layoutChar == '%':
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self.walls[x][y] = True
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elif layoutChar == '.':
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self.food[x][y] = True
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elif layoutChar == 'o':
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self.capsules.append((x, y))
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elif layoutChar == 'P':
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self.agentPositions.append( (0, (x, y) ) )
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elif layoutChar in ['G']:
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self.agentPositions.append( (1, (x, y) ) )
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self.numGhosts += 1
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elif layoutChar in ['1', '2', '3', '4']:
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self.agentPositions.append( (int(layoutChar), (x,y)))
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self.numGhosts += 1
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def getLayout(name, back = 2):
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if name.endswith('.lay'):
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layout = tryToLoad('layouts/' + name)
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if layout == None: layout = tryToLoad(name)
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else:
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layout = tryToLoad('layouts/' + name + '.lay')
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if layout == None: layout = tryToLoad(name + '.lay')
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if layout == None and back >= 0:
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curdir = os.path.abspath('.')
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os.chdir('..')
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layout = getLayout(name, back -1)
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os.chdir(curdir)
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return layout
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def tryToLoad(fullname):
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if(not os.path.exists(fullname)): return None
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f = open(fullname)
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try: return Layout([line.strip() for line in f])
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finally: f.close()
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