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No:51336

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Block Breaker
Developer User4527｜Date and time 24/3/11 21:28:16
Build time 21.77 sec｜Game capacity 3.364KB｜

Script

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Click here for free DL of the app version that can save data.

<!DOCTYPE html>
<html>
<head>
  <title>Block Breaker Game</title>
  <style>
    #gameCanvas {
      border: 1px solid black;
    }
  </style>
</head>
<body>
  <canvas id="gameCanvas" width="400" height="600"></canvas>
  
  <script>
    const canvas = document.getElementById('gameCanvas');
    const ctx = canvas.getContext('2d');
    
    const paddleWidth = 80;
    const paddleHeight = 10;
    let paddleX = (canvas.width - paddleWidth) / 2;
    const ballRadius = 10;
    let ballX = canvas.width / 2;
    let ballY = canvas.height - 30;
    let dx = 2;
    let dy = -2;
    const brickRowCount = 3;
    const brickColumnCount = 5;
    const brickWidth = 75;
    const brickHeight = 20;
    const brickPadding = 10;
    const brickOffsetTop = 30;
    const brickOffsetLeft = 30;
    const bricks = [];
    for(let c=0; c<brickColumnCount; c++) {
      bricks[c] = [];
      for(let r=0; r<brickRowCount; r++) {
        bricks[c][r] = { x: 0, y: 0, status: 1 };
      }
    }
    
    function drawPaddle() {
      ctx.beginPath();
      ctx.rect(paddleX, canvas.height - paddleHeight, paddleWidth, paddleHeight);
      ctx.fillStyle = '#0095DD';
      ctx.fill();
      ctx.closePath();
    }
    
    function drawBall() {
      ctx.beginPath();
      ctx.arc(ballX, ballY, ballRadius, 0, Math.PI*2);
      ctx.fillStyle = '#0095DD';
      ctx.fill();
      ctx.closePath();
    }
    
    function drawBricks() {
      for(let c=0; c<brickColumnCount; c++) {
        for(let r=0; r<brickRowCount; r++) {
          if(bricks[c][r].status === 1) {
            const brickX = (c*(brickWidth+brickPadding)) + brickOffsetLeft;
            const brickY = (r*(brickHeight+brickPadding)) + brickOffsetTop;
            bricks[c][r].x = brickX;
            bricks[c][r].y = brickY;
            ctx.beginPath();
            ctx.rect(brickX, brickY, brickWidth, brickHeight);
            ctx.fillStyle = '#0095DD';
            ctx.fill();
            ctx.closePath();
          }
        }
      }
    }
    
    function collisionDetection() {
      for(let c=0; c<brickColumnCount; c++) {
        for(let r=0; r<brickRowCount; r++) {
          const b = bricks[c][r];
          if(b.status === 1) {
            if(ballX > b.x && ballX < b.x+brickWidth && ballY > b.y && ballY < b.y+brickHeight) {
              dy = -dy;
              b.status = 0;
            }
          }
        }
      }
    }
    
    function draw() {
      ctx.clearRect(0, 0, canvas.width, canvas.height);
      drawPaddle();
      drawBricks();
      drawBall();
      collisionDetection();
      
      if(ballX + dx > canvas.width - ballRadius || ballX + dx < ballRadius) {
        dx = -dx;
      }
      if(ballY + dy < ballRadius) {
        dy = -dy;
      } else if(ballY + dy > canvas.height - ballRadius) {
        if(ballX > paddleX && ballX < paddleX + paddleWidth) {
          dy = -dy;
        } else {
          alert('Game Over');
          document.location.reload();
        }
      }
      
      ballX += dx;
      ballY += dy;
      
      requestAnimationFrame(draw);
    }
    
    document.addEventListener('keydown', function(e) {
      if(e.key === 'ArrowRight' && paddleX < canvas.width - paddleWidth) {
        paddleX += 10;
      } else if(e.key === 'ArrowLeft' && paddleX > 0) {
        paddleX -= 10;
      }
    });
    
    draw();
  </script>
</body>
</html>