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War ping pong
Developer User20178｜Date and time 24/2/25 16:01:33
Build time 6.56 sec｜Game capacity 2.168KB｜

Script

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[PR]現在の売れ筋アプリランキング

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

<!DOCTYPE html>
<html>
<head>
<title>War Ping Pong</title>
<style>
canvas {
    border: 1px solid #000;
    display: block;
    margin: 0 auto;
}
</style>
</head>
<body>
<canvas id="gameCanvas" width="800" height="600"></canvas>
<script>
let canvas = document.getElementById('gameCanvas');
let 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;

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 drawPaddle() {
    ctx.beginPath();
    ctx.rect(paddleX, canvas.height - paddleHeight, paddleWidth, paddleHeight);
    ctx.fillStyle = '#0095DD';
    ctx.fill();
    ctx.closePath();
}

function drawBall() {
    ctx.beginPath();
    ctx.arc(x, y, ballRadius, 0, Math.PI * 2);
    ctx.fillStyle = '#0095DD';
    ctx.fill();
    ctx.closePath();
}

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

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;
}

setInterval(draw, 10);
</script>
</body>
</html>