colosseumrl.envs.blokus.board module

Author: Caleb Pitts Date: 3/15/19

Summary: Handles state of hte board, piece placements, and valid move driver methods.

COLOR ENCODINGS 0 - Blank 1 - Red 2 - Blue 3 - Green 4 - Yellow

colosseumrl.envs.blokus.board.BOARD_TO_PLAYER_OBSERVATION_ROTATION_MATRICES = array([[[ 1, 0], [ 0, 1]], [[ 0, -1], [ 1, 0]], [[-1, 0], [ 0, -1]], [[ 0, 1], [-1, 0]]], dtype=int32)

class colosseumrl.envs.blokus.board.Board(copy_from_board=None)

Bases: object

calculate_winner(players, round_count)

Returns the winner player color.

check_orientation_shifts(player_color, piece_type, index, orientation)

DESCRIPTION: Shifts piece N times where N is how large the piece is. Each piece shift

is then checked to see whether it is a valid move.

PARAMETERS: player_color: int indicating current player color

piece_type: string mapping to set of default offsets (defined in global space) index: tuple representing index coords on board orientation: string specifying the current orientation being checked

RETURNS: List of all offset lists where a shift at that index and orientation is possible

check_valid_corner(board_contents, player_color, row_num, col_num)

Checks whether all adjacent pieces are a different color to the current player’s color. Checks if any corner piece is the same color as the current player.

decode_color(player_color)

Converts int representatio of player color to string representation.

gather_empty_corner_indexes(player_color)

Returns a list of tuples with the indexes of empty corner cells that connect to the player’s color. The corner_index is not adjecent/touching any same color tiles on its sides beside its corners.

get_all_valid_moves(round_count, player_color, player_pieces)

Gathers all valid moves on the board that meet the following criteria: - Index of selected piece touches same-colored corner of a piece - Player piece does not fall outside of the board - Player piece does not overlap any of their pieces or other opponent pieces - May lay adjacent to another piece as long as its another color

place_piece(x, y)

Places piece on board by filling board_contents with the current player color

reset_board(copy_from_board=None)

Creates empty 2-dimensional 20 by 20 numpy zeros array that represents a clean board

update_board(player_color, piece_type, index, piece_orientation, round_count, ai_game)

Takes index point and places piece_type on board index[0] = x coord index[1] = y coord

colosseumrl.envs.blokus.board.ORIENTATIONS = ['north', 'northeast', 'east', 'southeast', 'south', 'southwest', 'west', 'northwest']

colosseumrl.envs.blokus.board.PIECE_TYPES = {'domino1': array([[0, 0], [1, 0]]), 'monomino1': array([[0, 0]]), 'pentominoe1': array([[ 0, 0], [ 0, -1], [ 1, 0], [ 2, 0], [ 3, 0]]), 'pentominoe10': array([[ 0, 0], [ 1, 0], [ 1, -1], [ 1, 1], [ 2, -1]]), 'pentominoe11': array([[ 0, 0], [-1, 0], [ 1, 0], [ 0, -1], [ 0, 1]]), 'pentominoe12': array([[ 0, 0], [ 1, 0], [ 1, -1], [ 2, 0], [ 3, 0]]), 'pentominoe2': array([[ 0, 0], [ 0, -1], [ 0, 1], [ 1, 0], [ 2, 0]]), 'pentominoe3': array([[ 0, 0], [ 0, -1], [ 0, -2], [ 1, -2], [ 2, -2]]), 'pentominoe4': array([[ 0, 0], [ 1, 0], [ 1, -1], [ 2, -1], [ 3, -1]]), 'pentominoe5': array([[ 0, 0], [ 0, 1], [ 1, 0], [ 2, 0], [ 2, -1]]), 'pentominoe6': array([[0, 0], [1, 0], [2, 0], [3, 0], [4, 0]]), 'pentominoe7': array([[ 0, 0], [ 1, 0], [ 2, 0], [ 1, -1], [ 2, -1]]), 'pentominoe8': array([[ 0, 0], [ 0, 1], [ 1, 0], [ 1, -1], [ 2, -1]]), 'pentominoe9': array([[0, 0], [1, 0], [0, 1], [0, 2], [1, 2]]), 'tetrominoes1': array([[0, 0], [1, 0], [0, 1], [1, 1]]), 'tetrominoes2': array([[ 0, 0], [ 1, -1], [ 1, 0], [ 2, 0]]), 'tetrominoes3': array([[0, 0], [1, 0], [2, 0], [3, 0]]), 'tetrominoes4': array([[ 0, 0], [ 1, 0], [ 2, 0], [ 2, -1]]), 'tetrominoes5': array([[ 0, 0], [ 1, 0], [ 1, -1], [ 2, -1]]), 'trominoe1': array([[0, 0], [1, 0], [1, 1]]), 'trominoe2': array([[0, 0], [1, 0], [2, 0]])}

colosseumrl.envs.blokus.board.PLAYER_DEFAULT_CORNERS = [(0, 0), (19, 0), (0, 19), (19, 19)]

colosseumrl.envs.blokus.board.PLAYER_OBSERVATION_TO_BOARD_ROTATION_MATRICES = array([[[ 1, 0], [ 0, 1]], [[ 0, 1], [-1, 0]], [[-1, 0], [ 0, -1]], [[ 0, -1], [ 1, 0]]], dtype=int32)