Capturing Mouse Clicks on an array/patch

clear
clc


[board, DrawRes, N, Theta, onerow, playerturn, FigSize] = setboard();

[Xline, Yline, BoardCenterX, BoardCenterY, radius] = Grid(onerow, FigSize)

[BoardColor] = DrawPiece(onerow, BoardCenterX, BoardCenterY, Theta, radius, board);

for i = 1:60

    clc
    disp(board)
    while playerturn > 0

       fprintf('Player %i turn\n', playerturn)
       [x1,y1] = inputmoves();

        if board(y1,x1) == 0
            board(y1,x1) = playerturn;
            playerturn = switchplayers(playerturn);
            [BoardColor] = DrawPiece(onerow, BoardCenterX, BoardCenterY, Theta, radius, board);

        end
    end
end

I'm trying to make a game of tictactoe, and I have it set up where there are graphics and that there is a patch array which stores each place a player can go. my problem is that I don't know how to make it so when I click on the patch area it finds the patch coordinate and matches it with the one in the main array (in this case board) where the code then recognizes it as part of the board/ graphics. Right now I have it where the user inputs coordinates into the command window and then it goes to the board array but I want to be able to do this by clicking on the space I want.

[Ruger28]

Not an answer, but I have done similar things to this using uicontrol pushbuttons as an arrary. I actually just made the old game Snake using this method. You can determine which pushbutton was pressed, and get row/column coordinates via this method.

[Ruger28]

Also worth noting, that groot could be of use capturing your mouse location

GROOT = groot;
sprintf('Current Mouse Location = [%f, %f]',GROOT.PointerLocation(1),GROOT.PointerLocation(2));

Be aware of the units GROOT is in. Not sure if this helps, but it is something.

Answer 1

[Geoff Hayes]

Sarah - very late to this, but you can use hittest to capture mouse clicks on graphics objects (in your case, the nine different patches). For example, the following code for a 3x3 grid changes the patch a different colour whenever pressed (red or blue for player 1 or player 2 respectively):

function TicTacToeExample

    hFigure = figure;
    hAxes = axes;
    axis equal;
    axis off;
    hold on;
    
    squareEdgeSize = 5;

    % create the board of patch objects
    hPatchObjects = zeros(3,3);
    for j = 3:-1:1
        for k = 1:3
            hPatchObjects(3 - j+ 1, k) = rectangle('Position', [k*squareEdgeSize,j*squareEdgeSize,squareEdgeSize,squareEdgeSize], 'FaceColor', [0 0.5 0.5],...
                'EdgeColor', 'k', 'LineWidth', 3, 'HitTest', 'on', 'ButtonDownFcn', {@OnPatchPressedCallback, 3 - j+ 1, k});
        end
    end
    
    gameBoard = zeros(3,3);
    atPlayer = 1;
    playerColours = [1 0 0; 0 0 1];
    
    xlim([squareEdgeSize 4*squareEdgeSize]);
    ylim([squareEdgeSize 4*squareEdgeSize]);
    
    function OnPatchPressedCallback(hObject, eventdata, rowIndex, colIndex)
        % remove callback so square can't be chosen again
        set(hObject, 'ButtonDownFcn', []);
        
        % change FaceColor to player colour
        set(hObject, 'FaceColor', playerColours(atPlayer, :));
        
        % update the game board
        gameBoard(rowIndex,colIndex) = atPlayer;
    end

Each patch is assigned the OnPatchPressedCallback callback function with the only difference being the row and column index (for the patch) into the game board. Once any player has selected a square (patch) then this callback fires and we change its colour, update the game board, and remove the callback from the patch object (so that no player can choose it again).

[Chris]

Hello there,

Is there a way to retrieve the Board array once the user is done activating cells outside the function? I can't find a way to do this, even with a global statement.