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/**
* Created by Alex on 5/20/2015.
*/
function loadJSON(path, success, error) {
var xhr = new XMLHttpRequest();
xhr.onreadystatechange = function () {
if (xhr.readyState === 4) {
if (xhr.status === 200) {
success(JSON.parse(xhr.responseText));
}
else {
error(xhr);
}
}
};
xhr.open('GET', path, true);
xhr.send();
}
function getScaleFreeNetwork(nodeCount) {
var nodes = [];
var edges = [];
var connectionCount = [];
// randomly create some nodes and edges
for (var i = 0; i < nodeCount; i++) {
nodes.push({
id: i,
label: String(i)
});
connectionCount[i] = 0;
// create edges in a scale-free-network 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]++;
}
}
return {nodes:nodes, edges:edges};
}
var randomSeed = 764; // Math.round(Math.random()*1000);
function seededRandom() {
var x = Math.sin(randomSeed++) * 10000;
return x - Math.floor(x);
}
function getScaleFreeNetworkSeeded(nodeCount, seed) {
if (seed) {
randomSeed = Number(seed);
}
var nodes = [];
var edges = [];
var connectionCount = [];
var edgesId = 0;
// randomly create some nodes and edges
for (var i = 0; i < nodeCount; i++) {
nodes.push({
id: i,
label: String(i)
});
connectionCount[i] = 0;
// create edges in a scale-free-network way
if (i == 1) {
var from = i;
var to = 0;
edges.push({
id: edgesId++,
from: from,
to: to
});
connectionCount[from]++;
connectionCount[to]++;
}
else if (i > 1) {
var conn = edges.length * 2;
var rand = Math.floor(seededRandom() * 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({
id: edgesId++,
from: from,
to: to
});
connectionCount[from]++;
connectionCount[to]++;
}
}
return {nodes:nodes, edges:edges};
}
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