32 lines
1.1 KiB
HTML
32 lines
1.1 KiB
HTML
<!doctype html>
|
|
<html>
|
|
<head>
|
|
<meta charset="utf-8">
|
|
<title>Gradient Fill Radial</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>
|
|
window.onload = function () {
|
|
var canvas = document.getElementById('canvas'),
|
|
context = canvas.getContext('2d'),
|
|
c1 = {x: 150, y: 150, radius: 0}, //gradient start circle
|
|
c2 = {x: 150, y: 150, radius: 50}, //gradient end circle
|
|
gradient = context.createRadialGradient(c1.x, c1.y, c1.radius,
|
|
c2.x, c2.y, c2.radius);
|
|
//all black alpha blend
|
|
gradient.addColorStop(0, "#000000");
|
|
gradient.addColorStop(1, "rgba(0, 0, 0, 0)"); //alpha required
|
|
|
|
context.fillStyle = gradient;
|
|
context.fillRect(100, 100, 100, 100);
|
|
};
|
|
</script>
|
|
</body>
|
|
</html>
|