蟹が玉のブロック崩し's game

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No:29553

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蟹が玉のブロック崩し
Developer User14508｜Date and time 23/12/17 13:16:41
Build time 40.061 sec｜Game capacity 4.593KB｜

Script

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

<!DOCTYPE html>
<html>
<head>
  <meta charset="UTF-8">
  <title>蟹が玉のブロック崩し</title>
  <style>
    * {
      margin: 0;
      padding: 0;
      box-sizing: border-box;
    }
    
    canvas {
      display: block;
      margin: 0 auto;
      background-color: #202020;
    }
  </style>
</head>
<body>
  <canvas id="gameCanvas" width="480" height="320"></canvas>

const ballRadius = 10;
    let ballX = canvas.width / 2;
    let ballY = canvas.height - 30;
    let ballDX = 2;
    let ballDY = -2;

const paddleHeight = 10;
    const paddleWidth = 75;
    let paddleX = (canvas.width - paddleWidth) / 2;

let rightPressed = false;
    let leftPressed = false;

const brickRowCount = 3;
    const brickColumnCount = 5;
    const brickWidth = 75;
    const brickHeight = 20;
    const brickPadding = 10;
    const brickOffsetTop = 30;
    const brickOffsetLeft = 30;
    
    let score = 0;

document.addEventListener("keydown", keyDownHandler);
    document.addEventListener("keyup", keyUpHandler);

function keyDownHandler(e) {
      if (e.key === "Right" || e.key === "ArrowRight") {
        rightPressed = true;
      } else if (e.key === "Left" || e.key === "ArrowLeft") {
        leftPressed = true;
      }
    }

function keyUpHandler(e) {
      if (e.key === "Right" || e.key === "ArrowRight") {
        rightPressed = false;
      } else if (e.key === "Left" || e.key === "ArrowLeft") {
        leftPressed = false;
      }
    }

function drawBall() {
      ctx.beginPath();
      ctx.arc(ballX, ballY, 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 drawScore() {
      ctx.font = "16px Arial";
      ctx.fillStyle = "#0095DD";
      ctx.fillText("Score: " + score, 8, 20);
    }

function draw() {
      ctx.clearRect(0, 0, canvas.width, canvas.height);
      drawBricks();
      drawBall();
      drawPaddle();
      drawScore();
      collisionDetection();

if (ballX + ballDX > canvas.width - ballRadius || ballX + ballDX < ballRadius) {
        ballDX = -ballDX;
      }
      if (ballY + ballDY < ballRadius) {
        ballDY = -ballDY;
      } else if (ballY + ballDY > canvas.height - ballRadius) {
        if (ballX > paddleX && ballX < paddleX + paddleWidth) {
          ballDY = -ballDY;
        } else {
          alert("Game Over");
          document.location.reload();
        }
      }

if (rightPressed && paddleX < canvas.width - paddleWidth) {
        paddleX += 7;
      } else if (leftPressed && paddleX > 0) {
        paddleX -= 7;
      }

ballX += ballDX;
      ballY += ballDY;

requestAnimationFrame(draw);
    }

draw();
  </script>
</body>
</html>