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No:48898

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Make a game of pong
Developer User20876｜Date and time 24/3/3 6:53:22
Build time 6.043 sec｜Game capacity 2.446KB｜

Script

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[PR]現在の売れ筋ゲームアプリランキング

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

```html
<!DOCTYPE html>
<html>
<head>
    <title>Pong Game</title>
</head>
<body>
    <canvas id="canvas" width="600" height="400"></canvas>
    <script>
        const canvas = document.getElementById('canvas');
        const ctx = canvas.getContext('2d');

let ball = {
            x: canvas.width / 2,
            y: canvas.height / 2,
            dx: 2,
            dy: -2,
            radius: 10
        };

let player = {
            x: 0,
            y: canvas.height / 2 - 50,
            width: 10,
            height: 100
        };

function drawBall() {
            ctx.beginPath();
            ctx.arc(ball.x, ball.y, ball.radius, 0, Math.PI * 2);
            ctx.fillStyle = 'white';
            ctx.fill();
            ctx.closePath();
        }

function drawPlayer() {
            ctx.fillStyle = 'white';
            ctx.fillRect(player.x, player.y, player.width, player.height);
        }

function movePlayer(direction) {
            if (direction === 'up' && player.y > 0) {
                player.y -= 5;
            } else if (direction === 'down' && player.y < canvas.height - player.height) {
                player.y += 5;
            }
        }

function collisionDetection() {
            if (ball.y + ball.dy > canvas.height - ball.radius || ball.y + ball.dy < ball.radius) {
                ball.dy = -ball.dy;
            }

if (ball.x + ball.dx > canvas.width - ball.radius) {
                ball.dx = -ball.dx;
            } else if (ball.x + ball.dx < ball.radius) {
                if (ball.y > player.y && ball.y < player.y + player.height) {
                    ball.dx = -ball.dx;
                } else {
                    alert("Game Over! You lost.");
                    document.location.reload();
                }
            }
        }

function update() {
            ctx.clearRect(0, 0, canvas.width, canvas.height);
            drawBall();
            drawPlayer();
            collisionDetection();

ball.x += ball.dx;
            ball.y += ball.dy;

requestAnimationFrame(update);
        }

update();
    </script>
</body>
</html>
```