// Simple Breakout Game macro created by
// ChatGPT using the prompt:
//   "Create an ImageJ macro that implements a
//   version of the classic Atari breakout game."

width = 400;
height = 300;
paddleWidth = 60;
paddleHeight = 8;
paddleY = height - 20;
ballX = width/2;
ballY = height/2;
ballVX = 2;
ballVY = -2;
ballSize = 6;
rows = 5;
cols = 10;
brickW = width/cols;
brickH = 15;

// Brick array (1 = alive, 0 = destroyed)
bricks = newArray(rows * cols);
Array.fill(bricks,1);

// Create image
call("ij.gui.ImageWindow.centerNextImage");
newImage("Breakout", "8-bit black", width, height, 1);

function drawGame(paddleX) {
    setColor(0);
    fillRect(0,0,width,height);

    // Draw bricks
   brickCount = 0;
   setColor(200);
   for (r=0; r<rows; r++) {
        for (c=0; c<cols; c++) {
            idx = r*cols + c;
             if (bricks[idx] == 1) {
                x = c * brickW;
                y = r * brickH + 20;
                fillRect(x, y, brickW-2, brickH-2);
            }
         }
    }

    // Draw paddle
    setColor(255); 
    fillRect(paddleX, paddleY, paddleWidth, paddleHeight);

    // Draw ball
    fillOval(ballX, ballY, ballSize, ballSize);
}

 paddleX = width/2 - paddleWidth/2;
 autoUpdate(false); // disable automatic display updates

 while (true) {

    // Mouse controls paddle
    getCursorLoc(x, y, z, flags);
    paddleX = x - paddleWidth/2;
    if (paddleX < 0) paddleX = 0;
    if (paddleX > width - paddleWidth) paddleX = width - paddleWidth;

    // Move ball
    ballX += ballVX;
    ballY += ballVY;

    // Wall collisions
    if (ballX <= 0 || ballX >= width-ballSize) ballVX *= -1;
    if (ballY <= 0) ballVY *= -1;

    // Paddle collision
    if (ballY + ballSize >= paddleY &&
        ballX + ballSize >= paddleX &&
        ballX <= paddleX + paddleWidth) {
        ballVY *= -1;
        ballY = paddleY - ballSize;
        beep;
    }

    // Brick collision
    for (r=0; r<rows; r++) {
        for (c=0; c<cols; c++) {
            idx = r*cols + c;
            if (bricks[idx] == 1) {
                bx = c * brickW;
                by = r * brickH + 20;
                if (ballX + ballSize > bx && ballX < bx + brickW &&
                    ballY + ballSize > by && ballY < by + brickH) {
                    bricks[idx] = 0;
                    ballVY *= -1;
                    beep;
                }
            }
        }
    }

    // Game over?
    if (ballY > height) {
        showMessage("Breakout","   Game Over   ");
        close;
        exit;
    }

    // Game won?
    Array.getStatistics(bricks,min,max,mean,stdDev);
    if (max==0) {
        showMessage("Breakout","  Congratulations!!  ");
        exit;
    }

    drawGame(paddleX);
    updateDisplay();
    wait(15);

}