add weighted movement for ai, so it'll intentionally capture things
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jake
parent
da75e49e23
commit
43faa277bb
1 changed files with 132 additions and 40 deletions
172
Main.gd
172
Main.gd
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@ -81,56 +81,148 @@ func _process(_delta):
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ai_move(team2, board_to_text_board(board))
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if click_spot() == Vector2(7,1):
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ai_move(team1, board_to_text_board(board))
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if click_spot() == Vector2(6,0):
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ai_move(team2, board_to_text_board(board), ai_modes.weighted_random)
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if click_spot() == Vector2(6,1):
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ai_move(team1, board_to_text_board(board), ai_modes.weighted_random)
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enum ai_modes {
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purely_random,
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weighted_random,
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minimax_depth_2,
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}
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var ai_weights = {
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pawn = 10,
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knight = 30,
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bishop = 30,
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rook = 50,
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queen = 80,
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king = 1000,
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}
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func ai_move(team, text_board, ai_mode=ai_modes.purely_random):
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var legal_every_move = team_every_legal_move(text_board, team)
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legal_every_move.shuffle()
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if ai_mode == ai_modes.purely_random:
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while 1:
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var piece_and_moves = legal_every_move.pop_back()
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if piece_and_moves:
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pass
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else:
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break # AI literally cannot move this turn, game should be offically over before this occurs
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var piece = piece_and_moves[0]
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var moves = piece_and_moves[1]
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if moves:
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print(moves)
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moves.shuffle()
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var move = moves.pop_back()
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var pos = position_to_board_cell(Vector2(piece[0] * board_cell, piece[1] * board_cell))
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var board_piece = board[pos[0]][pos[1]]
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board_piece.position = in_square(Vector2(move[0] * board_cell, move[1] * board_cell))
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if board[move[0]][move[1]]:
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board[move[0]][move[1]].kill()
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board[move[0]][move[1]] = board_piece
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board[pos[0]][pos[1]] = 0
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if move.size() == 3:
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if move[2] == movement_condition.en_passant_kill:
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kill_en_passant_pawn([move[0], move[1]])
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elif move[2] == movement_condition.king_side_castling:
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# TODO hard coding rook positions like this seems bad
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var rook = board[7][pos[1]]
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rook.position = in_square(Vector2(5 * board_cell, pos[1] * board_cell))
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board[5][pos[1]] = board[7][pos[1]]
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board[7][pos[1]] = 0
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elif move[2] == movement_condition.queen_side_castling:
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# TODO hard coding rook positions like this seems bad
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var rook = board[0][pos[1]]
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rook.position = in_square(Vector2(3 * board_cell, pos[1] * board_cell))
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board[3][pos[1]] = board[0][pos[1]]
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board[0][pos[1]] = 0
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#print("piece at (%s,%s), to (%s,%s)" % [ piece[0], piece[1], move[0], move[1] ])
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break
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else:
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continue
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ai_random_move(legal_every_move)
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elif ai_mode == ai_modes.weighted_random:
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ai_weighted_random(team, text_board, legal_every_move)
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new_turn()
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func ai_make_move(piece, move):
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var pos = position_to_board_cell(Vector2(piece[0] * board_cell, piece[1] * board_cell))
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var board_piece = board[pos[0]][pos[1]]
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board_piece.position = in_square(Vector2(move[0] * board_cell, move[1] * board_cell))
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if board[move[0]][move[1]]:
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board[move[0]][move[1]].kill()
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board[move[0]][move[1]] = board_piece
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board[pos[0]][pos[1]] = 0
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if move.size() == 3:
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if move[2] == movement_condition.en_passant_kill:
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kill_en_passant_pawn([move[0], move[1]])
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elif move[2] == movement_condition.king_side_castling:
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# TODO hard coding rook positions like this seems bad
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var rook = board[7][pos[1]]
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rook.position = in_square(Vector2(5 * board_cell, pos[1] * board_cell))
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board[5][pos[1]] = board[7][pos[1]]
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board[7][pos[1]] = 0
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elif move[2] == movement_condition.queen_side_castling:
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# TODO hard coding rook positions like this seems bad
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var rook = board[0][pos[1]]
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rook.position = in_square(Vector2(3 * board_cell, pos[1] * board_cell))
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board[3][pos[1]] = board[0][pos[1]]
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board[0][pos[1]] = 0
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func ai_random_move(legal_every_move):
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legal_every_move.shuffle()
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while 1:
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var piece_and_moves = legal_every_move.pop_back()
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if ! piece_and_moves:
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if ! legal_every_move:
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break # AI literally cannot move this turn, game should be offically over before this occurs
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var piece = piece_and_moves[0]
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var moves = piece_and_moves[1]
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if moves:
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#rint(moves)
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moves.shuffle()
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var move = moves.pop_back()
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ai_make_move(piece, move)
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return
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else:
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continue
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func ai_weighted_random(team, text_board, legal_every_move):
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# generate a board with 'points' on it.
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# if move[x],move[y] corrispond over some points keep the move in memory. then, sort move by smallest to greatest points
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# pop_back() to get 'best move'. if there are no moves, just do random movement.
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var p_board = generate_points_board(team, text_board)
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var saved_moves = []
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for every_move in legal_every_move:
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var piece = every_move[0]
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var moves = every_move[1]
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if moves:
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for move in moves:
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if p_board[move[0]][move[1]] > 0:
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saved_moves.append([p_board[move[0]][move[1]], piece, move])
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else:
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continue
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if saved_moves.size() > 0:
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saved_moves.shuffle()
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#rint(saved_moves)
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saved_moves.sort_custom(self, "sort_ascending") # sort, by smallest to greatest, then pop_back()
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print(saved_moves)
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var the_move = saved_moves.pop_back()
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ai_make_move(the_move[1], the_move[2])
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else:
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ai_random_move(legal_every_move)
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func sort_ascending(a, b):
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if a[0] < b[0]:
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return true
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return false
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func generate_points_board(team, text_board):
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var p_board = new_board()
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for i in 8:
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for k in 8:
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var piece = text_board[i][k]
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if piece:
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match piece[0]:
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piece_names.pawn:
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if piece[1] == team:
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p_board[i][k] = -1 * ai_weights.pawn
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else:
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p_board[i][k] = ai_weights.pawn
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piece_names.rook:
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if piece[1] == team:
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p_board[i][k] = -1 * ai_weights.rook
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else:
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p_board[i][k] = ai_weights.rook
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piece_names.knight:
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if piece[1] == team:
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p_board[i][k] = -1 * ai_weights.knight
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else:
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p_board[i][k] = ai_weights.knight
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piece_names.bishop:
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if piece[1] == team:
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p_board[i][k] = -1 * ai_weights.bishop
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else:
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p_board[i][k] = ai_weights.bishop
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piece_names.queen:
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if piece[1] == team:
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p_board[i][k] = -1 * ai_weights.queen
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else:
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p_board[i][k] = ai_weights.queen
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piece_names.king:
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if piece[1] == team:
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p_board[i][k] = -1 * ai_weights.king
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else:
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p_board[i][k] = ai_weights.king
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else:
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p_board[i][k] = 0
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return p_board
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func new_turn():
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check_for_promotion()
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var text_board = board_to_text_board(board)
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