d3-force testing ground

.block

license: gpl-3.0
height: 1030
scrolling: yes

README.md

This demo lets you interactively try various settings and combinations of forces for d3-force.

It's based on Mike Bostock's example code for a force directed graph.

code.js

var svg = d3.select("svg"),
    width = +svg.node().getBoundingClientRect().width,
    height = +svg.node().getBoundingClientRect().height;

// svg objects
var link, node;
// the data - an object with nodes and links
var graph;

// load the data
d3.json("miserables.json", function(error, _graph) {
  if (error) throw error;
  graph = _graph;
  initializeDisplay();
  initializeSimulation();
});



//////////// FORCE SIMULATION //////////// 

// force simulator
var simulation = d3.forceSimulation();

// set up the simulation and event to update locations after each tick
function initializeSimulation() {
  simulation.nodes(graph.nodes);
  initializeForces();
  simulation.on("tick", ticked);
}

// values for all forces
forceProperties = {
    center: {
        x: 0.5,
        y: 0.5
    },
    charge: {
        enabled: true,
        strength: -30,
        distanceMin: 1,
        distanceMax: 2000
    },
    collide: {
        enabled: true,
        strength: .7,
        iterations: 1,
        radius: 5
    },
    forceX: {
        enabled: false,
        strength: .1,
        x: .5
    },
    forceY: {
        enabled: false,
        strength: .1,
        y: .5
    },
    link: {
        enabled: true,
        distance: 30,
        iterations: 1
    }
}

// add forces to the simulation
function initializeForces() {
    // add forces and associate each with a name
    simulation
        .force("link", d3.forceLink())
        .force("charge", d3.forceManyBody())
        .force("collide", d3.forceCollide())
        .force("center", d3.forceCenter())
        .force("forceX", d3.forceX())
        .force("forceY", d3.forceY());
    // apply properties to each of the forces
    updateForces();
}

// apply new force properties
function updateForces() {
    // get each force by name and update the properties
    simulation.force("center")
        .x(width * forceProperties.center.x)
        .y(height * forceProperties.center.y);
    simulation.force("charge")
        .strength(forceProperties.charge.strength * forceProperties.charge.enabled)
        .distanceMin(forceProperties.charge.distanceMin)
        .distanceMax(forceProperties.charge.distanceMax);
    simulation.force("collide")
        .strength(forceProperties.collide.strength * forceProperties.collide.enabled)
        .radius(forceProperties.collide.radius)
        .iterations(forceProperties.collide.iterations);
    simulation.force("forceX")
        .strength(forceProperties.forceX.strength * forceProperties.forceX.enabled)
        .x(width * forceProperties.forceX.x);
    simulation.force("forceY")
        .strength(forceProperties.forceY.strength * forceProperties.forceY.enabled)
        .y(height * forceProperties.forceY.y);
    simulation.force("link")
        .id(function(d) {return d.id;})
        .distance(forceProperties.link.distance)
        .iterations(forceProperties.link.iterations)
        .links(forceProperties.link.enabled ? graph.links : []);

    // updates ignored until this is run
    // restarts the simulation (important if simulation has already slowed down)
    simulation.alpha(1).restart();
}



//////////// DISPLAY ////////////

// generate the svg objects and force simulation
function initializeDisplay() {
  // set the data and properties of link lines
  link = svg.append("g")
        .attr("class", "links")
    .selectAll("line")
    .data(graph.links)
    .enter().append("line");

  // set the data and properties of node circles
  node = svg.append("g")
        .attr("class", "nodes")
    .selectAll("circle")
    .data(graph.nodes)
    .enter().append("circle")
        .call(d3.drag()
            .on("start", dragstarted)
            .on("drag", dragged)
            .on("end", dragended));

  // node tooltip
  node.append("title")
      .text(function(d) { return d.id; });
  // visualize the graph
  updateDisplay();
}

// update the display based on the forces (but not positions)
function updateDisplay() {
    node
        .attr("r", forceProperties.collide.radius)
        .attr("stroke", forceProperties.charge.strength > 0 ? "blue" : "red")
        .attr("stroke-width", forceProperties.charge.enabled==false ? 0 : Math.abs(forceProperties.charge.strength)/15);

    link
        .attr("stroke-width", forceProperties.link.enabled ? 1 : .5)
        .attr("opacity", forceProperties.link.enabled ? 1 : 0);
}

// update the display positions after each simulation tick
function ticked() {
    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; });
    d3.select('#alpha_value').style('flex-basis', (simulation.alpha()*100) + '%');
}



//////////// UI EVENTS ////////////

function dragstarted(d) {
  if (!d3.event.active) simulation.alphaTarget(0.3).restart();
  d.fx = d.x;
  d.fy = d.y;
}

function dragged(d) {
  d.fx = d3.event.x;
  d.fy = d3.event.y;
}

function dragended(d) {
  if (!d3.event.active) simulation.alphaTarget(0.0001);
  d.fx = null;
  d.fy = null;
}

// update size-related forces
d3.select(window).on("resize", function(){
    width = +svg.node().getBoundingClientRect().width;
    height = +svg.node().getBoundingClientRect().height;
    updateForces();
});

// convenience function to update everything (run after UI input)
function updateAll() {
    updateForces();
    updateDisplay();
}

index.html

<html>
<head>
<style>
/* HTML styles */
html{ width: 100%; }
body{ 
  width: 100%; 
  margin: 0; padding: 0; 
  display: flex; 
  font-family: sans-serif; font-size: 75%; }
.controls {
  flex-basis: 200px;
  padding: 0 5px;
}
.controls .force {
  background-color:#eee;
  border-radius: 3px;
  padding: 5px;
  margin: 5px 0;
}
.controls .force p label { margin-right: .5em; font-size: 120%; font-weight: bold;}
.controls .force p { margin-top: 0;}
.controls .force label { display: inline-block; }
.controls input[type="checkbox"] { transform: scale(1.2, 1.2); }
.controls input[type="range"] { margin: 0 5% 0.5em 5%; width: 90%; }
/* alpha viewer */
.controls .alpha p { margin-bottom: .25em; }
.controls .alpha .alpha_bar { height: .5em; border: 1px #777 solid; border-radius: 2px; padding: 1px; display: flex; }
.controls .alpha .alpha_bar #alpha_value { background-color: #555; border-radius: 1px; flex-basis: 100% }
.controls .alpha .alpha_bar:hover { border-width: 2px; margin:-1px; }
.controls .alpha .alpha_bar:active #alpha_value { background-color: #222 }

/* SVG styles */
svg {
  flex-basis: 100%;
  min-width: 200px;
}
.links line {
  stroke: #aaa;
}
.nodes circle {
  pointer-events: all;
}

</style>
</head>
<body>
<div class="controls">
  <div class="force alpha">
    <p><label>alpha</label> Simulation activity</p>
    <div class="alpha_bar" onclick="updateAll();"><div id="alpha_value"></div></div>
  </div>
  <div class="force">
    <p><label>center</label> Shifts the view, so the graph is centered at this location.</p>
    <label>
      x
      <output id="center_XSliderOutput">.5</output>
      <input type="range" min="0" max="1" value=".5" step="0.01" oninput="d3.select('#center_XSliderOutput').text(value); forceProperties.center.x=value; updateAll();">
    </label>
    <label>
      y
      <output id="center_YSliderOutput">.5</output>
      <input type="range" min="0" max="1" value=".5" step="0.01" oninput="d3.select('#center_YSliderOutput').text(value); forceProperties.center.y=value; updateAll();">
    </label>
  </div>

  <div class="force">
    <p><label><input type="checkbox" checked onchange="forceProperties.charge.enabled = this.checked; updateAll();"> charge</label> Attracts (+) or repels (-) nodes to/from each other.</p>
    <label title="Negative strength repels nodes. Positive strength attracts nodes.">
      strength
      <output id="charge_StrengthSliderOutput">-30</output>
      <input type="range" min="-200" max="50" value="-30" step=".1" oninput="d3.select('#charge_StrengthSliderOutput').text(value); forceProperties.charge.strength=value; updateAll();">
    </label>
    <label title="Minimum distance where force is applied">
      distanceMin
      <output id="charge_distanceMinSliderOutput">1</output>
      <input type="range" min="0" max="50" value="1" step=".1" oninput="d3.select('#charge_distanceMinSliderOutput').text(value); forceProperties.charge.distanceMin=value; updateAll();">
    </label>
    <label title="Maximum distance where force is applied">
      distanceMax
      <output id="charge_distanceMaxSliderOutput">2000</output>
      <input type="range" min="0" max="2000" value="2000" step=".1" oninput="d3.select('#charge_distanceMaxSliderOutput').text(value); forceProperties.charge.distanceMax=value; updateAll();">
    </label>
  </div>

  <div class="force">
    <p><label><input type="checkbox" checked onchange="forceProperties.collide.enabled = this.checked; updateAll();"> collide</label> Prevents nodes from overlapping</p>
    <label>
      strength
      <output id="collide_StrengthSliderOutput">.7</output>
      <input type="range" min="0" max="2" value=".7" step=".1" oninput="d3.select('#collide_StrengthSliderOutput').text(value); forceProperties.collide.strength=value; updateAll();">
    </label>
    <label title="Size of nodes">
      radius
      <output id="collide_radiusSliderOutput">5</output>
      <input type="range" min="0" max="100" value="5" step="1" oninput="d3.select('#collide_radiusSliderOutput').text(value); forceProperties.collide.radius=value; updateAll();">
    </label>
    <label title="Higher values increase rigidity of the nodes (WARNING: high values are computationally expensive)">
      iterations
      <output id="collide_iterationsSliderOutput">1</output>
      <input type="range" min="1" max="10" value="1" step="1" oninput="d3.select('#collide_iterationsSliderOutput').text(value); forceProperties.collide.iterations=value; updateAll();">
    </label>
  </div>

  <div class="force">
    <p><label><input type="checkbox" onchange="forceProperties.forceX.enabled = this.checked; updateAll();"> forceX</label> Acts like gravity. Pulls all points towards an X location.</p>
    <label>
      strength
      <output id="forceX_StrengthSliderOutput">.1</output>
      <input type="range" min="0" max="1" value=".1" step="0.01" oninput="d3.select('#forceX_StrengthSliderOutput').text(value); forceProperties.forceX.strength=value; updateAll();">
    </label>
    <label title="The X location that the force will push the nodes to (NOTE: This demo multiplies by the svg width)">
      x
      <output id="forceX_XSliderOutput">.5</output>
      <input type="range" min="0" max="1" value=".5" step="0.01" oninput="d3.select('#forceX_XSliderOutput').text(value); forceProperties.forceX.x=value; updateAll();">
    </label>
  </div>

  <div class="force">
    <p><label><input type="checkbox" onchange="forceProperties.forceY.enabled = this.checked; updateAll();"> forceY</label> Acts like gravity. Pulls all points towards a Y location.</p>
    <label>
      strength
      <output id="forceY_StrengthSliderOutput">.1</output>
      <input type="range" min="0" max="1" value=".1" step="0.01" oninput="d3.select('#forceY_StrengthSliderOutput').text(value); forceProperties.forceY.strength=value; updateAll();">
    </label>
    <label title="The Y location that the force will push the nodes to (NOTE: This demo multiplies by the svg height)">
      y
      <output id="forceY_YSliderOutput">.5</output>
      <input type="range" min="0" max="1" value=".5" step="0.01" oninput="d3.select('#forceY_YSliderOutput').text(value); forceProperties.forceY.y=value; updateAll();">
    </label>
  </div>

  <div class="force">
    <p><label><input type="checkbox" checked onchange="forceProperties.link.enabled = this.checked; updateAll();"> link</label> Sets link length</p>
    <label title="The force will push/pull nodes to make links this long">
      distance
      <output id="link_DistanceSliderOutput">30</output>
      <input type="range" min="0" max="100" value="30" step="1" oninput="d3.select('#link_DistanceSliderOutput').text(value); forceProperties.link.distance=value; updateAll();">
    </label>
    <label title="Higher values increase rigidity of the links (WARNING: high values are computationally expensive)">
      iterations
      <output id="link_IterationsSliderOutput">1</output>
      <input type="range" min="1" max="10" value="1" step="1" oninput="d3.select('#link_IterationsSliderOutput').text(value); forceProperties.link.iterations=value; updateAll();">
    </label>
  </div>
</div>
<svg></svg>
<script src="https://d3js.org/d3.v4.min.js"></script>
<script src="code.js"></script>
</body>
</html>

miserables.json

{
  "nodes": [
    {"id": "Myriel", "group": 1},
    {"id": "Napoleon", "group": 1},
    {"id": "Mlle.Baptistine", "group": 1},
    {"id": "Mme.Magloire", "group": 1},
    {"id": "CountessdeLo", "group": 1},
    {"id": "Geborand", "group": 1},
    {"id": "Champtercier", "group": 1},
    {"id": "Cravatte", "group": 1},
    {"id": "Count", "group": 1},
    {"id": "OldMan", "group": 1},
    {"id": "Labarre", "group": 2},
    {"id": "Valjean", "group": 2},
    {"id": "Marguerite", "group": 3},
    {"id": "Mme.deR", "group": 2},
    {"id": "Isabeau", "group": 2},
    {"id": "Gervais", "group": 2},
    {"id": "Tholomyes", "group": 3},
    {"id": "Listolier", "group": 3},
    {"id": "Fameuil", "group": 3},
    {"id": "Blacheville", "group": 3},
    {"id": "Favourite", "group": 3},
    {"id": "Dahlia", "group": 3},
    {"id": "Zephine", "group": 3},
    {"id": "Fantine", "group": 3},
    {"id": "Mme.Thenardier", "group": 4},
    {"id": "Thenardier", "group": 4},
    {"id": "Cosette", "group": 5},
    {"id": "Javert", "group": 4},
    {"id": "Fauchelevent", "group": 0},
    {"id": "Bamatabois", "group": 2},
    {"id": "Perpetue", "group": 3},
    {"id": "Simplice", "group": 2},
    {"id": "Scaufflaire", "group": 2},
    {"id": "Woman1", "group": 2},
    {"id": "Judge", "group": 2},
    {"id": "Champmathieu", "group": 2},
    {"id": "Brevet", "group": 2},
    {"id": "Chenildieu", "group": 2},
    {"id": "Cochepaille", "group": 2},
    {"id": "Pontmercy", "group": 4},
    {"id": "Boulatruelle", "group": 6},
    {"id": "Eponine", "group": 4},
    {"id": "Anzelma", "group": 4},
    {"id": "Woman2", "group": 5},
    {"id": "MotherInnocent", "group": 0},
    {"id": "Gribier", "group": 0},
    {"id": "Jondrette", "group": 7},
    {"id": "Mme.Burgon", "group": 7},
    {"id": "Gavroche", "group": 8},
    {"id": "Gillenormand", "group": 5},
    {"id": "Magnon", "group": 5},
    {"id": "Mlle.Gillenormand", "group": 5},
    {"id": "Mme.Pontmercy", "group": 5},
    {"id": "Mlle.Vaubois", "group": 5},
    {"id": "Lt.Gillenormand", "group": 5},
    {"id": "Marius", "group": 8},
    {"id": "BaronessT", "group": 5},
    {"id": "Mabeuf", "group": 8},
    {"id": "Enjolras", "group": 8},
    {"id": "Combeferre", "group": 8},
    {"id": "Prouvaire", "group": 8},
    {"id": "Feuilly", "group": 8},
    {"id": "Courfeyrac", "group": 8},
    {"id": "Bahorel", "group": 8},
    {"id": "Bossuet", "group": 8},
    {"id": "Joly", "group": 8},
    {"id": "Grantaire", "group": 8},
    {"id": "MotherPlutarch", "group": 9},
    {"id": "Gueulemer", "group": 4},
    {"id": "Babet", "group": 4},
    {"id": "Claquesous", "group": 4},
    {"id": "Montparnasse", "group": 4},
    {"id": "Toussaint", "group": 5},
    {"id": "Child1", "group": 10},
    {"id": "Child2", "group": 10},
    {"id": "Brujon", "group": 4},
    {"id": "Mme.Hucheloup", "group": 8}
  ],
  "links": [
    {"source": "Napoleon", "target": "Myriel", "value": 1},
    {"source": "Mlle.Baptistine", "target": "Myriel", "value": 8},
    {"source": "Mme.Magloire", "target": "Myriel", "value": 10},
    {"source": "Mme.Magloire", "target": "Mlle.Baptistine", "value": 6},
    {"source": "CountessdeLo", "target": "Myriel", "value": 1},
    {"source": "Geborand", "target": "Myriel", "value": 1},
    {"source": "Champtercier", "target": "Myriel", "value": 1},
    {"source": "Cravatte", "target": "Myriel", "value": 1},
    {"source": "Count", "target": "Myriel", "value": 2},
    {"source": "OldMan", "target": "Myriel", "value": 1},
    {"source": "Valjean", "target": "Labarre", "value": 1},
    {"source": "Valjean", "target": "Mme.Magloire", "value": 3},
    {"source": "Valjean", "target": "Mlle.Baptistine", "value": 3},
    {"source": "Valjean", "target": "Myriel", "value": 5},
    {"source": "Marguerite", "target": "Valjean", "value": 1},
    {"source": "Mme.deR", "target": "Valjean", "value": 1},
    {"source": "Isabeau", "target": "Valjean", "value": 1},
    {"source": "Gervais", "target": "Valjean", "value": 1},
    {"source": "Listolier", "target": "Tholomyes", "value": 4},
    {"source": "Fameuil", "target": "Tholomyes", "value": 4},
    {"source": "Fameuil", "target": "Listolier", "value": 4},
    {"source": "Blacheville", "target": "Tholomyes", "value": 4},
    {"source": "Blacheville", "target": "Listolier", "value": 4},
    {"source": "Blacheville", "target": "Fameuil", "value": 4},
    {"source": "Favourite", "target": "Tholomyes", "value": 3},
    {"source": "Favourite", "target": "Listolier", "value": 3},
    {"source": "Favourite", "target": "Fameuil", "value": 3},
    {"source": "Favourite", "target": "Blacheville", "value": 4},
    {"source": "Dahlia", "target": "Tholomyes", "value": 3},
    {"source": "Dahlia", "target": "Listolier", "value": 3},
    {"source": "Dahlia", "target": "Fameuil", "value": 3},
    {"source": "Dahlia", "target": "Blacheville", "value": 3},
    {"source": "Dahlia", "target": "Favourite", "value": 5},
    {"source": "Zephine", "target": "Tholomyes", "value": 3},
    {"source": "Zephine", "target": "Listolier", "value": 3},
    {"source": "Zephine", "target": "Fameuil", "value": 3},
    {"source": "Zephine", "target": "Blacheville", "value": 3},
    {"source": "Zephine", "target": "Favourite", "value": 4},
    {"source": "Zephine", "target": "Dahlia", "value": 4},
    {"source": "Fantine", "target": "Tholomyes", "value": 3},
    {"source": "Fantine", "target": "Listolier", "value": 3},
    {"source": "Fantine", "target": "Fameuil", "value": 3},
    {"source": "Fantine", "target": "Blacheville", "value": 3},
    {"source": "Fantine", "target": "Favourite", "value": 4},
    {"source": "Fantine", "target": "Dahlia", "value": 4},
    {"source": "Fantine", "target": "Zephine", "value": 4},
    {"source": "Fantine", "target": "Marguerite", "value": 2},
    {"source": "Fantine", "target": "Valjean", "value": 9},
    {"source": "Mme.Thenardier", "target": "Fantine", "value": 2},
    {"source": "Mme.Thenardier", "target": "Valjean", "value": 7},
    {"source": "Thenardier", "target": "Mme.Thenardier", "value": 13},
    {"source": "Thenardier", "target": "Fantine", "value": 1},
    {"source": "Thenardier", "target": "Valjean", "value": 12},
    {"source": "Cosette", "target": "Mme.Thenardier", "value": 4},
    {"source": "Cosette", "target": "Valjean", "value": 31},
    {"source": "Cosette", "target": "Tholomyes", "value": 1},
    {"source": "Cosette", "target": "Thenardier", "value": 1},
    {"source": "Javert", "target": "Valjean", "value": 17},
    {"source": "Javert", "target": "Fantine", "value": 5},
    {"source": "Javert", "target": "Thenardier", "value": 5},
    {"source": "Javert", "target": "Mme.Thenardier", "value": 1},
    {"source": "Javert", "target": "Cosette", "value": 1},
    {"source": "Fauchelevent", "target": "Valjean", "value": 8},
    {"source": "Fauchelevent", "target": "Javert", "value": 1},
    {"source": "Bamatabois", "target": "Fantine", "value": 1},
    {"source": "Bamatabois", "target": "Javert", "value": 1},
    {"source": "Bamatabois", "target": "Valjean", "value": 2},
    {"source": "Perpetue", "target": "Fantine", "value": 1},
    {"source": "Simplice", "target": "Perpetue", "value": 2},
    {"source": "Simplice", "target": "Valjean", "value": 3},
    {"source": "Simplice", "target": "Fantine", "value": 2},
    {"source": "Simplice", "target": "Javert", "value": 1},
    {"source": "Scaufflaire", "target": "Valjean", "value": 1},
    {"source": "Woman1", "target": "Valjean", "value": 2},
    {"source": "Woman1", "target": "Javert", "value": 1},
    {"source": "Judge", "target": "Valjean", "value": 3},
    {"source": "Judge", "target": "Bamatabois", "value": 2},
    {"source": "Champmathieu", "target": "Valjean", "value": 3},
    {"source": "Champmathieu", "target": "Judge", "value": 3},
    {"source": "Champmathieu", "target": "Bamatabois", "value": 2},
    {"source": "Brevet", "target": "Judge", "value": 2},
    {"source": "Brevet", "target": "Champmathieu", "value": 2},
    {"source": "Brevet", "target": "Valjean", "value": 2},
    {"source": "Brevet", "target": "Bamatabois", "value": 1},
    {"source": "Chenildieu", "target": "Judge", "value": 2},
    {"source": "Chenildieu", "target": "Champmathieu", "value": 2},
    {"source": "Chenildieu", "target": "Brevet", "value": 2},
    {"source": "Chenildieu", "target": "Valjean", "value": 2},
    {"source": "Chenildieu", "target": "Bamatabois", "value": 1},
    {"source": "Cochepaille", "target": "Judge", "value": 2},
    {"source": "Cochepaille", "target": "Champmathieu", "value": 2},
    {"source": "Cochepaille", "target": "Brevet", "value": 2},
    {"source": "Cochepaille", "target": "Chenildieu", "value": 2},
    {"source": "Cochepaille", "target": "Valjean", "value": 2},
    {"source": "Cochepaille", "target": "Bamatabois", "value": 1},
    {"source": "Pontmercy", "target": "Thenardier", "value": 1},
    {"source": "Boulatruelle", "target": "Thenardier", "value": 1},
    {"source": "Eponine", "target": "Mme.Thenardier", "value": 2},
    {"source": "Eponine", "target": "Thenardier", "value": 3},
    {"source": "Anzelma", "target": "Eponine", "value": 2},
    {"source": "Anzelma", "target": "Thenardier", "value": 2},
    {"source": "Anzelma", "target": "Mme.Thenardier", "value": 1},
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  ]
}

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