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32 lines
1.1 KiB
HTML
32 lines
1.1 KiB
HTML
<!doctype html>
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<html>
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<head>
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<meta charset="utf-8">
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<title>Gradient Fill Radial</title>
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<link rel="stylesheet" href="../include/style.css">
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</head>
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<body>
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<header>
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Example from <a href="http://amzn.com/1430236655?tag=html5anim-20"><em>Foundation HTML5 Animation with JavaScript</em></a>
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</header>
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<canvas id="canvas" width="400" height="400"></canvas>
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<script>
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window.onload = function () {
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var canvas = document.getElementById('canvas'),
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context = canvas.getContext('2d'),
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c1 = {x: 150, y: 150, radius: 0}, //gradient start circle
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c2 = {x: 150, y: 150, radius: 50}, //gradient end circle
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gradient = context.createRadialGradient(c1.x, c1.y, c1.radius,
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c2.x, c2.y, c2.radius);
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//all black alpha blend
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gradient.addColorStop(0, "#000000");
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gradient.addColorStop(1, "rgba(0, 0, 0, 0)"); //alpha required
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context.fillStyle = gradient;
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context.fillRect(100, 100, 100, 100);
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};
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</script>
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</body>
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</html>
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