| 1 | <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
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| 2 | <html xmlns="http://www.w3.org/1999/xhtml">
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| 3 | <head>
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| 4 | <meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
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| 5 | <title>Heatmap</title>
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| 6 | <link href="css/style.css" rel="stylesheet" type="text/css" media="screen" />
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| 7 | <script type='text/javascript' src='http://svn.openlayers.org/sandbox/camptocamp/canvas/openlayers/lib/OpenLayers.js'></script>
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| 8 | <script src="script/heatmap.js"></script>
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| 9 | <script src="script/canvas-barrier.js"></script>
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| 10 |
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| 11 | <script type="text/javascript">
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| 12 | var map;
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| 13 | var vectorLayer;
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| 14 |
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| 15 | function init(){
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| 16 | map = new OpenLayers.Map('heatmap');
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| 17 |
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| 18 | var layer = new OpenLayers.Layer.WMS( "OpenLayers WMS",
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| 19 | "http://labs.metacarta.com/wms/vmap0", {layers: 'basic'} );
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| 20 | map.addLayer(layer);
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| 21 |
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| 22 | map.setCenter(new OpenLayers.LonLat(-101, 39), 4);
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| 23 |
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| 24 | vectorLayer = new OpenLayers.Layer.Vector.HeatMap("HeatMap", {
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| 25 | rendererOptions: {
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| 26 | // a radius of 20px looks good at this zoom-level
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| 27 | pointSize: 20 ,
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| 28 | heatMapWebWorkerPath: "../script/heatmap-webworker.js"
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| 29 |
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| 30 | }
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| 31 | });
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| 32 |
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| 33 | // create a few random points
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| 34 | var points = [];
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| 35 | for (var i = 0; i < 200 ; i++) {
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| 36 | var point = randomPoint();
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| 37 | var pointFeature = new OpenLayers.Feature.Vector(point);
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| 38 | points.push(pointFeature);
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| 39 | }
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| 40 | vectorLayer.addFeatures(points);
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| 41 |
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| 42 | vectorLayer.events.register("renderProgress", null, function(event) {
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| 43 | document.getElementById("progressBar").value = event.progress;
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| 44 | document.getElementById("progressBarFallback").innerHTML = event.progress;
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| 45 | });
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| 46 |
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| 47 |
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| 48 | map.addLayer(vectorLayer);
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| 49 | }
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| 50 |
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| 51 | function randomPoint() {
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| 52 | var x = random(20, 480);
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| 53 | var y = random(15, 240);
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| 54 | var lonlat = map.getLonLatFromPixel(new OpenLayers.Pixel(x, y));
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| 55 |
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| 56 | return new OpenLayers.Geometry.Point(lonlat.lon, lonlat.lat);
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| 57 | };
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| 58 |
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| 59 | function random(min, max) {
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| 60 | var delta = max - min;
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| 61 | var random = Math.floor(Math.random()*(delta + 1));
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| 62 |
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| 63 | return min + random;
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| 64 | };
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| 65 |
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| 66 | function toggleUseWebWorkers() {
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| 67 | vectorLayer.renderer.renderAsync = document.getElementById("useWebWorkers").checked;
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| 68 | }
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| 69 |
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| 70 | </script>
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| 71 | </head>
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| 72 |
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| 73 | <body onload="init()">
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| 74 | <div id="wrapper">
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| 75 | <div id="header">
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| 76 | <a href="index.html"><img src="img/logo.png" border="0" style="float: left;"/></a>
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| 77 | <font style="font-size:24px; color:white;">Stichting Wireless Leiden</font><br />
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| 78 | <font style="font-size:46px; color:white;">Heatmap</font>
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| 79 | </div>
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| 80 | <div id="content">
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| 81 | <h1>Info</h1><br />
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| 82 | OpenLayers heatmap. Kan traag zijn met laden.
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| 83 | Werkt misschien niet even goed met elke browser.
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| 84 | </div>
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| 85 | <div id="heatmap">
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| 86 | </div>
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| 87 | <div id="footer"> <a href="http://www.wirelessleiden.nl/">wirelessleiden.nl</a> </div>
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| 88 |
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| 89 |
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| 90 | </body>
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| 91 | </html>
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