GUIDE
- Left-click and drag the background to move the graph
- Left-click and drag the nodes to reorganize
- Left-click a node to view first level connections
- Double left-click a node to navigate to its page
- Double left-click the background to zoom in
- Right-click the background to zoom out
sigma.utils.pkg('sigma.canvas.nodes');
sigma.canvas.nodes.image = (function() {
var _cache = {},
_loading = {},
_callbacks = {};
// Return the renderer itself:
var renderer = function(node, context, settings) {
var args = arguments,
prefix = settings('prefix') || '',
size = node[prefix + 'size'],
color = node.color || settings('defaultNodeColor'),
url = node.url;
if (_cache[url]) {
context.save();
// Draw the clipping disc:
context.beginPath();
context.arc(
node[prefix + 'x'],
node[prefix + 'y'],
node[prefix + 'size'],
0,
Math.PI * 2,
true
);
context.closePath();
context.clip();
// Draw the image
context.drawImage(
_cache[url],
node[prefix + 'x'] - size,
node[prefix + 'y'] - size,
2 * size,
2 * size
);
// Quit the "clipping mode":
context.restore();
// Draw the border:
context.beginPath();
context.arc(
node[prefix + 'x'],
node[prefix + 'y'],
node[prefix + 'size'],
0,
Math.PI * 2,
true
);
context.lineWidth = 1;
context.strokeStyle = node.color || settings('defaultNodeColor');
context.stroke();
} else {
sigma.canvas.nodes.image.cache(url);
sigma.canvas.nodes.def.apply(
sigma.canvas.nodes,
args
);
}
};
// Let's add a public method to cache images, to make it possible to
// preload images before the initial rendering:
renderer.cache = function(url, callback) {
if (callback)
_callbacks[url] = callback;
if (_loading[url])
return;
var img = new Image();
img.onload = function() {
_loading[url] = false;
_cache[url] = img;
if (_callbacks[url]) {
_callbacks[url].call(this, img);
delete _callbacks[url];
}
};
_loading[url] = true;
img.src = url;
};
return renderer;
})();
var i,
s,
o,
offset_left = 0.5,
N = 1,
E = 40,
C = 5,
d = 0.5,
cs = [],
g = {
nodes: [],
edges: []
};
if (!sigma.classes.graph.hasMethod('neighbors')){
sigma.classes.graph.addMethod('neighbors', function(nodeId) {
var k,
neighbors = {},
index = this.allNeighborsIndex[nodeId] || {};
for (k in index)
neighbors[k] = this.nodesIndex[k];
return neighbors;
});
}
//adding the central node
g.nodes.push({
id: 63296,
label: 'Christine Chevalier',
type: 'image',
url: 'https://research.pasteur.fr/wp-content/uploads/2020/04/research_pasteur-christine-50-2-150x150.jpg',
x: 0,
y: 0,
size: 30,
color: '#DDDDDD'
});
var biggest_node_size = 0;
N=2
// adding node
var x_node = Math.cos(2 * 0 * Math.PI / N) * 10;
var y_node = Math.sin(2 * 0 * Math.PI / N) * 10;
g.nodes.push({
id: 205884,
label: 'NEWS: New publication – Epithelial cells maintain memory of prior infection with Streptococcus pneumoniae through di-methylation of histone H3.',
x: x_node,
y: y_node,
type: 'image',
url: '',
page_url: 'https://research.pasteur.fr/fr/news/new-publication-epithelial-cells-maintain-memory-of-prior-infection-with-streptococcus-pneumoniae-through-di-methylation-of-histone-h3/',
size: 35,
color: '#DDDDDD'
});
//link content to central post
g.edges.push({
id: 63296205884,
size: 0.5,
source: 63296,
target: 205884,
});
//check if content already exist
if (x_node<0){
x_site = x_node + ((Math.random() * 2)-1) - offset_left;
}else{
x_site = x_node + ((Math.random() * 2)-1) + offset_left;
}
if (y_node<0){
y_site = y_node + ((Math.random() * 2)-1) - offset_left;
}else{
y_site = y_node + ((Math.random() * 2)-1) + offset_left;
}
// adding site
g.nodes.push({
id: 159257,
label: 'Júlia Torné Cortada',
type: 'image',
url: 'https://research.pasteur.fr/wp-content/uploads/2021/05/research_pasteur-julia-torne-cortada-captura-de-pantalla-2021-05-13-a-las-19.13.32-150x150.jpg',
page_url: 'https://research.pasteur.fr/fr/member/julia-torne-cortada-2/',
x: x_site,
y: y_site,
size: 10,
color: '#dddddd'
});
//link to content
g.edges.push({
id: 205884159257,
size: 0.5,
source: 205884,
target: 159257 });
//check if content already exist
// update node size depending on the amount of edges
g.nodes.forEach(function(n) {
if (n.id == 63296) {
n.size = n.size + 8;
}
});
//link to content
g.edges.push({
id: 20588463296,
size: 0.5,
source: 205884,
target: 63296 });
//check if content already exist
if (x_node<0){
x_site = x_node + ((Math.random() * 2)-1) - offset_left;
}else{
x_site = x_node + ((Math.random() * 2)-1) + offset_left;
}
if (y_node<0){
y_site = y_node + ((Math.random() * 2)-1) - offset_left;
}else{
y_site = y_node + ((Math.random() * 2)-1) + offset_left;
}
// adding site
g.nodes.push({
id: 4087,
label: 'Mélanie Hamon',
type: 'image',
url: 'https://research.pasteur.fr/wp-content/uploads/2016/01/research.pasteur.fr_p1010312-version-2-4-150x150.jpg',
page_url: 'https://research.pasteur.fr/fr/member/melanie-hamon/',
x: x_site,
y: y_site,
size: 10,
color: '#dddddd'
});
//link to content
g.edges.push({
id: 2058844087,
size: 0.5,
source: 205884,
target: 4087 });
// adding node
var x_node = Math.cos(2 * 1 * Math.PI / N) * 10;
var y_node = Math.sin(2 * 1 * Math.PI / N) * 10;
g.nodes.push({
id: 62866,
label: 'TEAM: Chromatine et Infection',
x: x_node,
y: y_node,
type: 'image',
url: 'https://research.pasteur.fr/wp-content/uploads/2016/09/research.pasteur.fr_institutpasteur_50133-150x150.jpeg',
page_url: 'https://research.pasteur.fr/fr/team/chromatin-and-infection/',
size: 35,
color: '#DDDDDD'
});
//link content to central post
g.edges.push({
id: 6329662866,
size: 0.5,
source: 63296,
target: 62866,
});
//check if content already exist
// update node size depending on the amount of edges
g.nodes.forEach(function(n) {
if (n.id == 63296) {
n.size = n.size + 8;
}
});
//link to content
g.edges.push({
id: 6286663296,
size: 0.5,
source: 62866,
target: 63296 });
//check if content already exist
if (x_node<0){
x_site = x_node + ((Math.random() * 2)-1) - offset_left;
}else{
x_site = x_node + ((Math.random() * 2)-1) + offset_left;
}
if (y_node<0){
y_site = y_node + ((Math.random() * 2)-1) - offset_left;
}else{
y_site = y_node + ((Math.random() * 2)-1) + offset_left;
}
// adding site
g.nodes.push({
id: 83719,
label: 'Michael Connor',
type: 'image',
url: 'https://research.pasteur.fr/wp-content/uploads/2019/04/research_pasteur-michael-connor-150x150.jpg',
page_url: 'https://research.pasteur.fr/fr/member/michael-connor/',
x: x_site,
y: y_site,
size: 10,
color: '#dddddd'
});
//link to content
g.edges.push({
id: 6286683719,
size: 0.5,
source: 62866,
target: 83719 });
//check if content already exist
if (x_node<0){
x_site = x_node + ((Math.random() * 2)-1) - offset_left;
}else{
x_site = x_node + ((Math.random() * 2)-1) + offset_left;
}
if (y_node<0){
y_site = y_node + ((Math.random() * 2)-1) - offset_left;
}else{
y_site = y_node + ((Math.random() * 2)-1) + offset_left;
}
// adding site
g.nodes.push({
id: 57919,
label: 'Claudia Chica',
type: 'image',
url: 'https://research.pasteur.fr/wp-content/uploads/2018/09/research_pasteur-img_1035-150x150.jpg',
page_url: 'https://research.pasteur.fr/fr/member/claudia-chica/',
x: x_site,
y: y_site,
size: 10,
color: '#dddddd'
});
//link to content
g.edges.push({
id: 6286657919,
size: 0.5,
source: 62866,
target: 57919 });
//check if content already exist
if (x_node<0){
x_site = x_node + ((Math.random() * 2)-1) - offset_left;
}else{
x_site = x_node + ((Math.random() * 2)-1) + offset_left;
}
if (y_node<0){
y_site = y_node + ((Math.random() * 2)-1) - offset_left;
}else{
y_site = y_node + ((Math.random() * 2)-1) + offset_left;
}
// adding site
g.nodes.push({
id: 8518,
label: 'Lucile Le Chevalier-Sontag',
type: 'image',
url: 'https://research.pasteur.fr/wp-content/uploads/2015/12/research.pasteur.fr_img_4253-150x150.jpg',
page_url: 'https://research.pasteur.fr/fr/member/lucile-le-chevalier-sontag/',
x: x_site,
y: y_site,
size: 10,
color: '#dddddd'
});
//link to content
g.edges.push({
id: 628668518,
size: 0.5,
source: 62866,
target: 8518 });
//check if content already exist
if (x_node<0){
x_site = x_node + ((Math.random() * 2)-1) - offset_left;
}else{
x_site = x_node + ((Math.random() * 2)-1) + offset_left;
}
if (y_node<0){
y_site = y_node + ((Math.random() * 2)-1) - offset_left;
}else{
y_site = y_node + ((Math.random() * 2)-1) + offset_left;
}
// adding site
g.nodes.push({
id: 223899,
label: 'Olivia Gardette',
type: 'image',
url: 'https://research.pasteur.fr/wp-content/uploads/2024/03/research_pasteur-enolivia-gardettefrolivia-gardette-olivia-gardette-jpg-150x150.jpg',
page_url: 'https://research.pasteur.fr/fr/member/olivia-gardette/',
x: x_site,
y: y_site,
size: 10,
color: '#dddddd'
});
//link to content
g.edges.push({
id: 62866223899,
size: 0.5,
source: 62866,
target: 223899 });
//check if content already exist
// update node size depending on the amount of edges
g.nodes.forEach(function(n) {
if (n.id == 159257) {
n.size = n.size + 8;
}
});
//link to content
g.edges.push({
id: 62866159257,
size: 0.5,
source: 62866,
target: 159257 });
//check if content already exist
if (x_node<0){
x_site = x_node + ((Math.random() * 2)-1) - offset_left;
}else{
x_site = x_node + ((Math.random() * 2)-1) + offset_left;
}
if (y_node<0){
y_site = y_node + ((Math.random() * 2)-1) - offset_left;
}else{
y_site = y_node + ((Math.random() * 2)-1) + offset_left;
}
// adding site
g.nodes.push({
id: 197263,
label: 'Alexander Lewis Marffy',
type: 'image',
url: 'https://research.pasteur.fr/wp-content/uploads/2023/02/research_pasteur-alm-professional-image-150x150.jpeg',
page_url: 'https://research.pasteur.fr/fr/member/alexander-lewis-marffy/',
x: x_site,
y: y_site,
size: 10,
color: '#dddddd'
});
//link to content
g.edges.push({
id: 62866197263,
size: 0.5,
source: 62866,
target: 197263 });
//check if content already exist
if (x_node<0){
x_site = x_node + ((Math.random() * 2)-1) - offset_left;
}else{
x_site = x_node + ((Math.random() * 2)-1) + offset_left;
}
if (y_node<0){
y_site = y_node + ((Math.random() * 2)-1) - offset_left;
}else{
y_site = y_node + ((Math.random() * 2)-1) + offset_left;
}
// adding site
g.nodes.push({
id: 232811,
label: 'Leonardo Gonzalez-Smith',
type: 'image',
url: 'https://research.pasteur.fr/wp-content/uploads/2024/10/research_pasteur-enleonardo-gonzalez-smithfrleonardo-gonzalez-smith-research-pasteur-enleonardo-gonzalez-smithfrleonardo-gonzalez-smith-capture-decran-2024-10-21-a-16.52.17-150x150.jpg',
page_url: 'https://research.pasteur.fr/fr/member/leonardo-gonzalez-smith/',
x: x_site,
y: y_site,
size: 10,
color: '#dddddd'
});
//link to content
g.edges.push({
id: 62866232811,
size: 0.5,
source: 62866,
target: 232811 });
//check if content already exist
if (x_node<0){
x_site = x_node + ((Math.random() * 2)-1) - offset_left;
}else{
x_site = x_node + ((Math.random() * 2)-1) + offset_left;
}
if (y_node<0){
y_site = y_node + ((Math.random() * 2)-1) - offset_left;
}else{
y_site = y_node + ((Math.random() * 2)-1) + offset_left;
}
// adding site
g.nodes.push({
id: 240821,
label: 'Joana Maria De Abreu Carvalho Pereira',
type: 'image',
url: 'https://research.pasteur.fr/wp-content/uploads/2025/03/research_pasteur-enjoana-maria-de-abreu-carvalho-pereirafrjoana-maria-de-abreu-carvalho-pereira-img-9338-150x150.jpg',
page_url: 'https://research.pasteur.fr/fr/member/joana-maria-de-abreu-carvalho-pereira/',
x: x_site,
y: y_site,
size: 10,
color: '#dddddd'
});
//link to content
g.edges.push({
id: 62866240821,
size: 0.5,
source: 62866,
target: 240821 });
//check if content already exist
if (x_node<0){
x_site = x_node + ((Math.random() * 2)-1) - offset_left;
}else{
x_site = x_node + ((Math.random() * 2)-1) + offset_left;
}
if (y_node<0){
y_site = y_node + ((Math.random() * 2)-1) - offset_left;
}else{
y_site = y_node + ((Math.random() * 2)-1) + offset_left;
}
// adding site
g.nodes.push({
id: 250799,
label: 'Marco Coluccia',
type: 'image',
url: 'https://research.pasteur.fr/wp-content/uploads/2025/10/research_pasteur-marco-coluccia-coluccia-id-photo-150x150.jpeg',
page_url: 'https://research.pasteur.fr/fr/member/marco-coluccia/',
x: x_site,
y: y_site,
size: 10,
color: '#dddddd'
});
//link to content
g.edges.push({
id: 62866250799,
size: 0.5,
source: 62866,
target: 250799 });
//check if content already exist
if (x_node<0){
x_site = x_node + ((Math.random() * 2)-1) - offset_left;
}else{
x_site = x_node + ((Math.random() * 2)-1) + offset_left;
}
if (y_node<0){
y_site = y_node + ((Math.random() * 2)-1) - offset_left;
}else{
y_site = y_node + ((Math.random() * 2)-1) + offset_left;
}
// adding site
g.nodes.push({
id: 248537,
label: 'Sofia Rucli',
type: 'image',
url: 'https://research.pasteur.fr/wp-content/uploads/2025/09/research_pasteur-sofia-rucli-img-1895-snapseedcopy-150x150.jpg',
page_url: 'https://research.pasteur.fr/fr/member/sofia-rucli/',
x: x_site,
y: y_site,
size: 10,
color: '#dddddd'
});
//link to content
g.edges.push({
id: 62866248537,
size: 0.5,
source: 62866,
target: 248537 });
//check if content already exist
if (x_node<0){
x_site = x_node + ((Math.random() * 2)-1) - offset_left;
}else{
x_site = x_node + ((Math.random() * 2)-1) + offset_left;
}
if (y_node<0){
y_site = y_node + ((Math.random() * 2)-1) - offset_left;
}else{
y_site = y_node + ((Math.random() * 2)-1) + offset_left;
}
// adding site
g.nodes.push({
id: 232806,
label: 'Matilde Diaz Goncalves',
type: 'image',
url: 'https://research.pasteur.fr/wp-content/uploads/2024/10/research_pasteur-enmatilde-diaz-goncalvesfrmatilde-diaz-goncalves-foto-tipo-passe-150x150.jpeg',
page_url: 'https://research.pasteur.fr/fr/member/matilde-diaz-goncalves/',
x: x_site,
y: y_site,
size: 10,
color: '#dddddd'
});
//link to content
g.edges.push({
id: 62866232806,
size: 0.5,
source: 62866,
target: 232806 });
//check if content already exist
if (x_node<0){
x_site = x_node + ((Math.random() * 2)-1) - offset_left;
}else{
x_site = x_node + ((Math.random() * 2)-1) + offset_left;
}
if (y_node<0){
y_site = y_node + ((Math.random() * 2)-1) - offset_left;
}else{
y_site = y_node + ((Math.random() * 2)-1) + offset_left;
}
// adding site
g.nodes.push({
id: 231515,
label: 'Sophie Oatley',
type: 'image',
url: '',
page_url: 'https://research.pasteur.fr/fr/member/sophie-oatley/',
x: x_site,
y: y_site,
size: 10,
color: '#dddddd'
});
//link to content
g.edges.push({
id: 62866231515,
size: 0.5,
source: 62866,
target: 231515 });
//check if content already exist
// update node size depending on the amount of edges
g.nodes.forEach(function(n) {
if (n.id == 4087) {
n.size = n.size + 8;
}
});
//link to content
g.edges.push({
id: 628664087,
size: 0.5,
source: 62866,
target: 4087 });
var s = new sigma({
//container: document.getElementById('graph-main'),
graph: g,
renderer: {
// IMPORTANT:
// This works only with the canvas renderer, so the
// renderer type set as "canvas" is necessary here.
container: document.getElementById('graph-main'),
type: 'canvas'
},
settings: {
minNodeSize: 6,
maxNodeSize: 35,
mouseWheelEnabled: false,
font: 'Montserrat',
labelThreshold:25,
borderSize:1,
defaultNodeBorderColor: '#999',
sideMargin:25,
}
});
// We first need to save the original colors of our
// nodes and edges, like this:
s.graph.nodes().forEach(function(n) {
n.originalColor = n.color;
});
s.graph.edges().forEach(function(e) {
e.originalColor = e.color;
});
// When a node is clicked, we check for each node
// if it is a neighbor of the clicked one. If not,
// we set its color as grey, and else, it takes its
// original color.
// We do the same for the edges, and we only keep
// edges that have both extremities colored.
s.bind('clickNode', function(e) {
var nodeId = e.data.node.id,
toKeep = s.graph.neighbors(nodeId);
toKeep[nodeId] = e.data.node;
s.graph.nodes().forEach(function(n) {
if (toKeep[n.id])
n.color = '#35a9f5';
else
n.color = '#dddddd';
});
s.graph.edges().forEach(function(e) {
if (toKeep[e.source] && toKeep[e.target])
e.color = '#35a9f5';
else
e.color = '#dddddd';
});
// Since the data has been modified, we need to
// call the refresh method to make the colors
// update effective.
s.refresh();
});
// When the stage is clicked, we just color each
// node and edge with its original color.
s.bind('clickStage', function(e) {
s.graph.nodes().forEach(function(n) {
n.color = n.originalColor;
});
s.graph.edges().forEach(function(e) {
e.color = e.originalColor;
});
// Same as in the previous event:
s.refresh();
});
s.bind("doubleClickNode", function (e) {
$("#canvas-wrap, .sigma-scene, .sigma-mouse").val();
ajax_load_page( e.data.node.page_url );
});
var c = s.camera;
s.bind("rightClickStage", function (e) {
sigma.misc.animation.camera(c, {
ratio: c.ratio * c.settings('zoomingRatio')
}, {
duration: 200
});
});
// Configure the noverlap layout:
var noverlapListener = s.configNoverlap({
nodeMargin: 10,
scaleNodes: 0.3,
gridSize: 1,
easing: 'quadraticInOut', // animation transition function
duration: 4000 // animation duration. Long here for the purposes of this example only
});
// Bind the events:
noverlapListener.bind('start stop interpolate', function(e) {
//console.log(e.type);
if(e.type === 'start') {
//console.time('noverlap');
}
if(e.type === 'interpolate') {
//console.timeEnd('noverlap');
}
});
// Start the layout:
s.startNoverlap();
//s.refresh();
// Initialize the dragNodes plugin:
var dragListener = sigma.plugins.dragNodes(s, s.renderers[0]);
dragListener.bind('startdrag', function(event) {
});
dragListener.bind('drag', function(event) {
});
dragListener.bind('drop', function(event) {
});
dragListener.bind('dragend', function(event) {
});