heatmap.js
Version:
Dynamic JavaScript Heatmaps for the Web
66 lines (59 loc) • 2.56 kB
HTML
<html lang="en">
<head>
<meta charset="utf-8">
<title>Raindrops example (custom gradient) | heatmap.js</title>
<style>
body, html { margin:0; padding:0; height:100%;}
body { font-family:sans-serif; }
#heatmapContainerWrapper { width:100%; height:100%; position:absolute; }
#heatmapContainer { width:100%; height:100%;}
h1 { position:absolute; background:black; color:white; padding:10px; font-weight:200;}
#all-examples-info { position:absolute; background:white; font-size:16px; padding:20px; top:100px; width:350px; line-height:150%; border:1px solid rgba(0,0,0,.2);}
</style>
</head>
<body>
<div id="heatmapContainerWrapper">
<div id="heatmapContainer">
</div>
</div>
<h1>Adding datapoints in real time with heatmap.js</h1>
<div id="all-examples-info">
<strong style="font-weight:bold;line-height:200%;font-size:18px;">Looking for more examples?</strong> <br />Check out the full <a href="http://www.patrick-wied.at/static/heatmapjs/examples.html?utm_source=gh_local" target="_blank">list of all heatmap.js examples</a> with more pointers & inline documentation.
</div>
<script src="/build/heatmap.js"></script>
<script>
window.onload = function() {
// create heatmap instance
var heatmap = h337.create({
container: document.getElementById('heatmapContainer'),
// a waterdrop gradient ;-)
gradient: { .1: 'rgba(0,0,0,0)', 0.25: "rgba(0,0,90, .6)", .6: "blue", .9: "cyan", .95: 'rgba(255,255,255,.4)'},
maxOpacity: .6,
radius: 10,
blur: .90
});
// boundaries for data generation
var width = (+window.getComputedStyle(document.body).width.replace(/px/,''));
var height = (+window.getComputedStyle(document.body).height.replace(/px/,''));
var generate = function() {
var max = 100;
var min = 0;
var t = [];
var x = (Math.random()* width) >> 0;
var y = (Math.random()* height) >> 0;
var c = 100;
var r = (Math.random()* 100) >> 0;
// add the datapoint to heatmap instance
heatmap.addData({ x: x, y:y, value: c, radius: r});
};
// this generates new datapoints in a kind of random timing
setTimeout(function test() {
var rand = (Math.random() * 500) >> 0;
generate();
setTimeout(test, rand);
}, 100);
};
</script>
</body>
</html>