Как добавить еще 10 мячей и анимировать их?
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Прыгающий мяч</title>
</head>
<body>
<canvas id="canvas" width="200" height="200"></canvas>
<script type="text/javascript">
var Ball = function () {
this.x = 100;
this.y = 100;
this.xSpeed = -2;
this.ySpeed = 3;
};
var circle = function (x, y, radius, fillCircle) {
ctx.beginPath();
ctx.arc(x, y, radius, 0, Math.PI * 2, false);
if (fillCircle) {
ctx.fill();
} else {
ctx.stroke();
}
};
Ball.prototype.draw = function() {
circle(this.x, this.y, 3, true);
};
Ball.prototype.move = function() {
this.x += this.xSpeed;
this.y += this.ySpeed;
};
Ball.prototype.checkCollision = function() {
if (this.x < 0 || this.x > 200) {
this.xSpeed = -this.xSpeed;
}
if (this.y < 0 || this.y > 200) {
this.ySpeed = -this.ySpeed;
}
};
var canvas = document.getElementById('canvas');
var ctx = canvas.getContext('2d');
var ball = new Ball;
setInterval(function () {
ctx.clearRect(0, 0, 200, 200);
ball.draw();
ball.move();
ball.checkCollision();
ctx.strokeRect(0, 0, 200, 200)
}, 10);
</script>
</body>
</html>
