Permalink
Switch branches/tags
Nothing to show
Find file Copy path
Fetching contributors…
Cannot retrieve contributors at this time
59 lines (53 sloc) 1.67 KB
<!doctype html>
<html>
<head>
<meta charset="utf-8">
<title>Fountain</title>
<link rel="stylesheet" href="../include/style.css">
</head>
<body>
<header>
Example from <a href="http://amzn.com/1430236655?tag=html5anim-20"><em>Foundation HTML5 Animation with JavaScript</em></a>
</header>
<canvas id="canvas" width="400" height="400"></canvas>
<script src="../include/utils.js"></script>
<script src="./classes/ball.js"></script>
<script>
window.onload = function () {
var canvas = document.getElementById('canvas'),
context = canvas.getContext('2d'),
balls = [],
numBalls = 80,
gravity = 0.5;
for (var ball, i = 0; i < numBalls; i++) {
ball = new Ball(2, Math.random() * 0xffffff);
ball.x = canvas.width / 2;
ball.y = canvas.height;
ball.vx = Math.random() * 2 - 1;
ball.vy = Math.random() * -10 - 10;
balls.push(ball);
}
function draw (ball) {
ball.vy += gravity;
ball.x += ball.vx;
ball.y += ball.vy;
if (ball.x - ball.radius > canvas.width ||
ball.x + ball.radius < 0 ||
ball.y - ball.radius > canvas.height ||
ball.y + ball.radius < 0) {
ball.x = canvas.width / 2;
ball.y = canvas.height;
ball.vx = Math.random() * 2 - 1;
ball.vy = Math.random() * -10 - 10;
}
ball.draw(context);
}
(function drawFrame () {
window.requestAnimationFrame(drawFrame, canvas);
context.clearRect(0, 0, canvas.width, canvas.height);
balls.forEach(draw);
}());
};
</script>
</body>
</html>