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Add a synthetic-lines example

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Éric Lemoine
2013-11-13 21:01:58 +01:00
committed by Tom Payne
parent 1ae0e845f8
commit 6493998a22
2 changed files with 171 additions and 0 deletions
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<!doctype html>
<html lang="en">
<head>
<meta charset="utf-8">
<meta http-equiv="X-UA-Compatible" content="chrome=1">
<meta name="viewport" content="initial-scale=1.0, user-scalable=no, width=device-width">
<link rel="stylesheet" href="../css/ol.css" type="text/css">
<link rel="stylesheet" href="../resources/bootstrap/css/bootstrap.min.css" type="text/css">
<link rel="stylesheet" href="../resources/layout.css" type="text/css">
<link rel="stylesheet" href="../resources/bootstrap/css/bootstrap-responsive.min.css" type="text/css">
<title>Synthetic lines example</title>
</head>
<body>
<div class="navbar navbar-inverse navbar-fixed-top">
<div class="navbar-inner">
<div class="container">
<a class="brand" href="./"><img src="../resources/logo.png"> OpenLayers 3 Examples</a>
</div>
</div>
</div>
<div class="container-fluid">
<div class="row-fluid">
<div class="span12">
<div id="map" class="map"></div>
</div>
</div>
<div class="row-fluid">
<div class="span12">
<h4 id="title">Synthetic lines example</h4>
<p id="shortdesc">Synthetic lines example.</p>
<div id="docs">
<p>See the <a href="synthetic-lines.js" target="_blank">synthetic-lines.js source</a> to see how this is done.</p>
<p>Performance results:</p>
<table border="1">
<thead>
<tr>
<th>Device/Browser</th>
<th>200 lines</th>
<th>500 lines</th>
<th>1000 lines</th>
<th>2000 lines</th>
<th>5000 lines</th>
<th>10000 lines</th>
<th>20000 lines</th>
</tr>
</thead>
<tbody>
<tr>
<td>Mac Book Air / Chrome 33 canary</td>
<td>60 fps</td>
<td>60 fps</td>
<td>60 fps</td>
<td>60 fps</td>
<td>60 fps</td>
<td>60 fps</td>
<td>60 fps</td>
</tr>
<tr>
<td>Mac Book Air / FireFox 25</td>
<td>60 fps</td>
<td>60 fps</td>
<td>60 fps</td>
<td>60 fps</td>
<td>60 fps</td>
<td>22 fps</td>
<td>6 fps</td>
</tr>
<tr>
<td>Mac Book Air / Safari 7</td>
<td>60 fps</td>
<td>60 fps</td>
<td>60 fps</td>
<td>40 fps</td>
<td>10 fps</td>
<td>N/A</td>
<td>N/A</td>
</tr>
<tr>
<td>iPhone 4S / iOS 7 / Safari</td>
<td>60 fps</td>
<td>33 fps</td>
<td>15 fps</td>
<td>5 fps</td>
<td>N/A</td>
<td>N/A</td>
<td>N/A</td>
</tr>
</tbody>
</table>
</div>
<div id="tags">vector</div>
</div>
</div>
</div>
<script src="loader.js?id=synthetic-lines" type="text/javascript"></script>
<script src="../resources/example-behaviour.js" type="text/javascript"></script>
<script src="../resources/display-frame-rate.js" type="text/javascript"></script>
</body>
</html>

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goog.require('ol.Feature');
goog.require('ol.Map');
goog.require('ol.RendererHint');
goog.require('ol.View2D');
goog.require('ol.geom.LineString');
goog.require('ol.layer.Vector');
goog.require('ol.source.Vector');
var count = 10000;
var features = new Array(count);
var startPoint = [0, 0];
var endPoint;
var delta, deltaX, deltaY;
var signX = 1;
var signY = -1;
// Create a square spiral.
var i;
for (i = 0; i < count; ++i) {
delta = (i + 1) * 2500;
if (i % 2 === 0) {
signY *= -1;
} else {
signX *= -1;
}
deltaX = delta * signX;
deltaY = delta * signY;
endPoint = [startPoint[0] + deltaX, startPoint[1] + deltaY];
features[i] = new ol.Feature({
'geometry': new ol.geom.LineString([startPoint, endPoint])
});
startPoint = endPoint;
}
var vector = new ol.layer.Vector({
source: new ol.source.Vector({
features: features
}),
styleFunction: function(feature) {
return {
stroke: {
color: '#666666',
width: 1
}
};
}
});
var view = new ol.View2D({
center: [0, 0],
zoom: 0
});
var map = new ol.Map({
layers: [vector],
renderer: ol.RendererHint.CANVAS,
target: 'map',
view: view
});