Pong!

Mike Croucher
/
Pong!
on 8 Nov 2023
10
24
0
1
1445
drawframe(1);
Write your drawframe function below
function drawframe(f)
    persistent ballPos ballVel paddle1Pos paddle2Pos
    % Define the figure on the first call
    if f == 1
        figure('Color', 'k');
        axis([0 50 0 50]);
        axis manual;
        hold on;
        box on;
        set(gca, 'Color', 'k', 'XColor', 'w', 'YColor', 'w', 'XTick', [], 'YTick', []);
        
        % Initialize positions and velocities
        ballPos = [25, 25];
        ballVel = [1, 0.2] * 4; % Speed of the ball
        paddle1Pos = [5, 25]; % Paddle 1 (left)
        paddle2Pos = [45, 25]; % Paddle 2 (right)
        
        % Draw the paddles and the ball
        paddle1 = rectangle('Position',[paddle1Pos, 2, 10],'FaceColor','w');
        paddle2 = rectangle('Position',[paddle2Pos, 2, 10],'FaceColor','w');
        ball = rectangle('Position',[ballPos, 2, 2],'Curvature',[1, 1],'FaceColor','w');
        
        % Store the graphics objects
        setappdata(gca, 'paddle1', paddle1);
        setappdata(gca, 'paddle2', paddle2);
        setappdata(gca, 'ball', ball);
    else
        % Update the ball's position
        ballPos = ballPos + ballVel;
        
        % Check for collision with top/bottom walls
        if ballPos(2) >= 98 || ballPos(2) <= 2
            ballVel(2) = -ballVel(2);
        end
        
        % Check for collision with paddles
        if (ballPos(1) <= paddle1Pos(1)+2 && ballPos(2) >= paddle1Pos(2) && ballPos(2) <= paddle1Pos(2)+10) || ...
           (ballPos(1) >= paddle2Pos(1)-2 && ballPos(2) >= paddle2Pos(2) && ballPos(2) <= paddle2Pos(2)+10)
            ballVel(1) = -ballVel(1);
        end
        
        % Update paddles' position (simple AI)
        if mod(f, 3) == 0 % Change the paddle position every 3 frames
            if ballPos(2) > paddle1Pos(2) + 3
                paddle1Pos(2) = paddle1Pos(2) + 1;
            elseif ballPos(2) < paddle1Pos(2) + 3
                paddle1Pos(2) = paddle1Pos(2) - 1;
            end
            if ballPos(2) > paddle2Pos(2) + 3
                paddle2Pos(2) = paddle2Pos(2) - 2;
            elseif ballPos(2) < paddle2Pos(2) + 3
                paddle2Pos(2) = paddle2Pos(2) + 2;
            end
        end
        
        % Get the graphics objects
        paddle1 = getappdata(gca, 'paddle1');
        paddle2 = getappdata(gca, 'paddle2');
        ball = getappdata(gca, 'ball');
        
        % Update the graphics objects
        set(paddle1, 'Position', [paddle1Pos, 2, 10]);
        set(paddle2, 'Position', [paddle2Pos, 2, 10]);
        set(ball, 'Position', [ballPos, 2, 2]);
    end
end
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