vis.js is a dynamic, browser-based visualization library
You can not select more than 25 topics Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
 
 
 

104 lines
2.8 KiB

<!doctype html>
<html>
<head>
<title>Graph | Random nodes</title>
<style type="text/css">
body {
font: 10pt sans;
}
</style>
<script type="text/javascript" src="../../vis.js"></script>
<script type="text/javascript">
var nodes = null;
var edges = null;
var graph = null;
function draw() {
nodes = [];
edges = [];
var connectionCount = [];
// randomly create some nodes and edges
var nodeCount = document.getElementById('nodeCount').value;
for (var i = 0; i < nodeCount; i++) {
nodes.push({
'id': i,
'text': String(i)
});
connectionCount[i] = 0;
// create edges in a scale-free-graph way
if (i == 1) {
var from = i;
var to = 0;
edges.push({
'from': from,
'to': to
});
connectionCount[from]++;
connectionCount[to]++;
}
else if (i > 1) {
var conn = edges.length * 2;
var rand = Math.floor(Math.random() * conn);
var cum = 0;
var j = 0;
while (j < connectionCount.length && cum < rand) {
cum += connectionCount[j];
j++;
}
var from = i;
var to = j;
edges.push({
'from': from,
'to': to
});
connectionCount[from]++;
connectionCount[to]++;
}
}
// specify options
var options = {
width: '600px',
height: '600px',
edges: {
length: 50
},
stabilize: false
};
// create a graph
graph = new vis.Graph(document.getElementById('mygraph'));
// draw data
graph.draw(nodes, edges, options);
// add event listeners
vis.events.addListener(graph, 'select', function(params) {
document.getElementById('selection').innerHTML =
'Selection: ' + JSON.stringify(graph.getSelection());
});
}
</script>
</head>
<body onload="draw();">
<form onsubmit="draw(); return false;">
<label for="nodeCount">Number of nodes:</label>
<input id="nodeCount" type="text" value="25" style="width: 50px;">
<input type="submit" value="Go">
</form>
<br>
<div id="mygraph"></div>
<p id="selection"></p>
</body>
</html>