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ビリヤード
Developer User16795｜Date and time 24/1/18 20:47:09
Build time 7.213 sec｜Game capacity 1.347KB｜

Script

ビリヤードゲーム

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<!DOCTYPE html>
<html>
<head>
    <meta charset="UTF-8">
    <title>ビリヤードゲーム</title>
</head>
<body>
    <h1>ビリヤードゲーム</h1>
    <canvas id="billiards" width="400" height="400"></canvas>

const ball = {
            x: 200,
            y: 200,
            radius: 20,
            dx: 4,
            dy: 4
        };

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

function moveBall() {
            ball.x += ball.dx;
            ball.y += ball.dy;

if (ball.x + ball.radius > canvas.width || ball.x - ball.radius < 0) {
                ball.dx = -ball.dx;
            }

if (ball.y + ball.radius > canvas.height || ball.y - ball.radius < 0) {
                ball.dy = -ball.dy;
            }
        }

function clearCanvas() {
            ctx.clearRect(0, 0, canvas.width, canvas.height);
        }

function draw() {
            clearCanvas();
            drawBall();
            moveBall();
        }

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