graph test

gistfile1.txt

var _ = require('underscore');
var $ = require('jquery');
var d3 = require('d3');

var testData = {
    "nodes":[
        {"name":"Myriel","group":1},
        {"name":"Napoleon","group":1}
    ],
    "links":[
        {"source":1,"target":0,"value":1}
    ]
};

window.testData = testData;

var width = 1100,
    height = 700;

var color = d3.scale.category20();

var force = d3.layout.force()
    .charge(-20)
    .linkDistance(10)
    .size([width, height])
    .nodes(testData.nodes)
    .links(testData.links);

var svg = d3.select("#d3-example").append("svg")
    .attr("width", width)
    .attr("height", height);

var link = svg.selectAll(".link")


var node = svg.selectAll(".node");

node.append("title")
    .text(function(d) { return d.name; });

force.on("tick", function() {
    link.attr("x1", function(d) { return d.source.x; })
        .attr("y1", function(d) { return d.source.y; })
        .attr("x2", function(d) { return d.target.x; })
        .attr("y2", function(d) { return d.target.y; });

    node.attr("cx", function(d) { return d.x; })
        .attr("cy", function(d) { return d.y; });
});

function render() {
    node = node.data(testData.nodes);
    node.enter().append("circle")
        .attr("class", "node")
        .attr("r", 5)
        .style("fill", function(d) { return color(d.group); })
        .call(force.drag);
    node.exit().remove();

    link = link.data(testData.links);
    link.enter().append("line")
        .attr("class", "link")
        .style("stroke-width", function(d) { return Math.sqrt(d.value); });
    link.exit().remove();

    force.start();
}

var limit = 500, i = 0;
var addNodesInterval = setInterval(function() {

    testData.nodes.push({"name":"Myriel","group":1});
    testData.links.push({
        source: Math.floor(Math.random() * (testData.nodes.length - 1)),
        target: Math.floor(Math.random() * (testData.nodes.length - 1))
    });

    render();
    force.start();

    i++;
    if(i >= limit) clearInterval(addNodesInterval);
}, 100);

render();