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ブロック崩し
Developer User19355｜Date and time 24/2/17 19:07:45
Build time 13.607 sec｜Game capacity 3.792KB｜

Script

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

<!DOCTYPE html>
<html>
<head>
<title>ブロック崩し</title>
<style>
    #canvas {
        background-color: lightblue;
    }
</style>
</head>
<body>
<canvas id="canvas" width="400" height="400"></canvas>

// パドルの設定
    const paddleWidth = 80;
    const paddleHeight = 10;
    let paddleX = (canvas.width - paddleWidth) / 2;

// ボールの設定
    let ballX = canvas.width / 2;
    let ballY = canvas.height - 30;
    let dx = 2;
    let dy = -2;
    const ballRadius = 10;

// ブロックの設定
    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 };
        }
    }

// パドルの操作
    document.addEventListener("mousemove", mouseMoveHandler, false);
    function mouseMoveHandler(e) {
        const relativeX = e.clientX - canvas.offsetLeft;
        if(relativeX > 0 && relativeX < canvas.width) {
            paddleX = relativeX - paddleWidth / 2;
        }
    }

// 衝突判定
    function collisionDetection() {
        for(let c = 0; c < brickColumnCount; c++) {
            for(let r = 0; r < brickRowCount; r++) {
                const brick = bricks[c][r];
                if(brick.status === 1) {
                    if(ballX > brick.x && ballX < brick.x + brickWidth && ballY > brick.y && ballY < brick.y + brickHeight) {
                        dy = -dy;
                        brick.status = 0;
                    }
                }
            }
        }
    }

// 描画
    function draw() {
        ctx.clearRect(0, 0, canvas.width, canvas.height);
        drawPaddle();
        drawBall();
        drawBricks();
        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("ゲームオーバー");
                document.location.reload();
            }
        }

ballX += dx;
        ballY += dy;

requestAnimationFrame(draw);
    }

function drawBall() {
        ctx.beginPath();
        ctx.arc(ballX, ballY, ballRadius, 0, Math.PI*2);
        ctx.fillStyle = "red";
        ctx.fill();
        ctx.closePath();
    }

function drawPaddle() {
        ctx.beginPath();
        ctx.rect(paddleX, canvas.height - paddleHeight, paddleWidth, paddleHeight);
        ctx.fillStyle = "blue";
        ctx.fill();
        ctx.closePath();
    }

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