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"""Imago GTP engine"""
from random import randrange
from imago.data.enums import Player
from imago.gameLogic.gameState import GameState
DEF_SIZE = 7
DEF_KOMI = 5.5
class GameEngine:
"""Plays the game of Go."""
def __init__(self):
self.komi = DEF_KOMI
self.gameState = GameState(DEF_SIZE)
def setBoardsize(self, newSize):
"""Changes the size of the board.
Board state, number of stones and move history become arbitrary.
It is wise to call clear_board after this command.
"""
self.gameState = GameState(newSize)
def clearBoard(self):
"""The board is cleared, the number of captured stones reset to zero and the move
history reset to empty.
"""
self.gameState.clearBoard()
def setKomi(self, komi):
"""Sets a new value of komi."""
self.komi = komi
def setFixedHandicap(self, stones):
"""Sets handicap stones in fixed vertices."""
if stones < 1 or stones > 9:
raise Exception("Wrong number of handicap stones")
# TODO: Set handicap stones
return [[0,0], [0,1]]
def play(self, color, vertex):
"""Plays in the vertex passed as argument"""
if vertex == "pass":
self.gameState.passForPlayer(color)
return
row = vertex[0]
col = vertex[1]
self.gameState.playMoveForPlayer(row, col, color)
def genmove(self, color):
"""The key of this TFG."""
# Get valid vertices to play at
validCells = []
board = self.gameState.getBoard().board
size = self.gameState.size
for row in range(size):
for col in range(size):
if board[row][col] == Player.EMPTY:
# Don't play on eyes!
if ( self.gameState.getBoard().getGroupCellsCount(row, col) != 1
and self.gameState.getBoard().isCellEye(row, col) == Player.EMPTY ):
validCells.append([row, col])
# Pass if no valid vertices
# Select a random vertex
randIndex = randrange(0, len(validCells))
move = validCells[randIndex]
self.gameState.playMoveForPlayer(move[0], move[1], color)
# NOTA: Esto usa gameState para hacer play, y en monteCarlo.py se usa GameMove
# para hacer add. Incoherente. Idealmente monteCarlo.py usaría un GameState en vez
# de acceder a los GameMove y gestionar un árbol...
return move
def undo(self):
"""The board configuration and number of captured stones are reset to the state
before the last move, which is removed from the move history.
"""
self.gameState.undo()
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