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No:50972

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Block Breaker
Developer User21444｜Date and time 24/3/10 11:11:20
Build time 10.824 sec｜Game capacity 3.775KB｜

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>
    canvas {
      display: block;
      margin: 0 auto;
    }
  </style>
</head>
<body>
  <canvas id="gameCanvas" width="800" height="600"></canvas>
  <script>
    const canvas = document.getElementById('gameCanvas');
    const ctx = canvas.getContext('2d');
    
    let paddleWidth = 100;
    let paddleHeight = 10;
    let paddleX = (canvas.width - paddleWidth) / 2;
    let ballRadius = 10;
    let x = canvas.width / 2;
    let y = canvas.height - 30;
    let dx = 2;
    let dy = -2;
    let rightPressed = false;
    let leftPressed = false;
    let brickRowCount = 3;
    let brickColumnCount = 5;
    let brickWidth = 75;
    let brickHeight = 20;
    let brickPadding = 10;
    let brickOffsetTop = 30;
    let brickOffsetLeft = 30;
    
    let 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 };
      }
    }
    
    document.addEventListener('keydown', keyDownHandler, false);
    document.addEventListener('keyup', keyUpHandler, false);
    
    function keyDownHandler(e) {
      if(e.keyCode == 39) {
        rightPressed = true;
      } else if(e.keyCode == 37) {
        leftPressed = true;
      }
    }
    
    function keyUpHandler(e) {
      if(e.keyCode == 39) {
        rightPressed = false;
      } else if(e.keyCode == 37) {
        leftPressed = false;
      }
    }
    
    function collisionDetection() {
      for(let c = 0; c < brickColumnCount; c++) {
        for(let r = 0; r < brickRowCount; r++) {
          let b = bricks[c][r];
          if(b.status == 1) {
            if(x > b.x && x < b.x + brickWidth && y > b.y && y < b.y + brickHeight) {
              dy = -dy;
              b.status = 0;
            }
          }
        }
      }
    }
    
    function drawBall() {
      ctx.beginPath();
      ctx.arc(x, y, ballRadius, 0, Math.PI*2);
      ctx.fillStyle = '#0095DD';
      ctx.fill();
      ctx.closePath();
    }
    
    function drawPaddle() {
      ctx.beginPath();
      ctx.rect(paddleX, canvas.height - paddleHeight, paddleWidth, paddleHeight);
      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) {
            let brickX = (c * (brickWidth + brickPadding)) + brickOffsetLeft;
            let 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 draw() {
      ctx.clearRect(0, 0, canvas.width, canvas.height);
      drawBricks();
      drawBall();
      drawPaddle();
      collisionDetection();
      
      if(x + dx > canvas.width - ballRadius || x + dx < ballRadius) {
        dx = -dx;
      }
      
      if(y + dy < ballRadius) {
        dy = -dy;
      } else if(y + dy > canvas.height - ballRadius) {
        if(x > paddleX && x < paddleX + paddleWidth) {
          dy = -dy;
        } else {
          alert('Game Over');
          document.location.reload();
        }
      }
      
      if(rightPressed && paddleX < canvas.width - paddleWidth) {
        paddleX += 7;
      } else if(leftPressed && paddleX > 0) {
        paddleX -= 7;
      }
      
      x += dx;
      y += dy;
      
      requestAnimationFrame(draw);
    }
    
    draw();
  </script>
</body>
</html>