matlab - Matlabリバーシの「有効な動き」チェック

Question

現在、移動チェッカーに問題があり、マトリックスの境界の外に見えないようにコードに入れているフェイルセーフが機能していないようです。何か提案はありますか?

また、機能していないように見えるという問題もあります (つまり、好きな場所にピースを配置できます!)。以前に使用したコードも以下にリストされています

コード：

function legal = legalMove()
    d_l = [0, -1];
    d_r = [0, 1];
    d_u = [-1, 0];
    d_d = [1, 0];
    d_ul = [-1, -1];
    d_ur = [-1, 1];
    d_dl = [1, -1];
    d_dr = [1, 1];
    directions = {'d_l' 'd_ul' 'd_u' 'd_ur' 'd_r' 'd_dr' 'd_d' 'd_dl'};
    valid_moves = zeros(8,8);

    for ci = 1:8
        for cj = 1:8
            if game_state(ci,cj) == 0 %check element = 0
        for count = 1:8
        d = eval( directions{count} );
        ti = ci+d(1);
        tj = cj+d(2);

        % Check if out of the board
            if (ti > 8 || ti < 1) || (tj > 8 || tj < 1)
                break
            else
        % Number of enemy pieces you went over
        cnt = 0;
        selected = game_state(ti, tj);

        % Move while going over enemy pieces
        while selected == player_number * -1
            ti = ti + d(1);
            tj = tj + d(2);
            selected = game_state(ti, tj);

            % Check if out of the board
                if (ti > 8 || ti < 1) || (tj > 8 || tj < 1)
                break
                else
                end

            % Count pieces you went over
            cnt = cnt + 1;
        end
            end

        % Check if you moved over enemy pieces & whether you landed on your piece
        if selected == player_number
            valid_moves(ti,tj) = 1;
        else
        end

        end
            else
            end
        end
    end

    if ~isempty(valid_moves)
        legal = 1;
    else
        legal = 0;
    end
end

実行時にエラーが返されました @ 境界:

Attempted to access game_state(0,7); index must be a positive integer or
logical.

Error in umpire/legalMove (line 217)
                selected = game_state(ti, tj);

Error in umpire/buttonPress (line 85)
        legal = legalMove();

他の部分:

function buttonPress(hObject, eventdata)



    ended = game_is_over();

    if ended == 1;
        setAllInactive();
        winner = calc_winner();
        if winner == -1;
            set(stat_text,'string','Winner is White! Restart?')
        elseif winner == 1;
            set(stat_text,'string','Winner is Black! Restart?')
        else
            set(stat_text,'string','Game is a tie! Restart?')
        end
    else
    end

    legal = legalMove();
    if legal ~= 1;
        set(stat_text,'Illegal move! Try again')
        return
    else
    end

    game_state(get(hObject,'userdata')) = player_number;
    drawScreen();
    player_number = player_number * -1;
end