Static force-directed graphForce-directed web workerForce-directed graph, canvasDisjoint force-directed graphForce-directed graphCollision detectionforceCenter.strengthsimulation.tickForce-directed latticeCollision DetectionTemporal force-directed graphSticky Force LayoutForce layout phyllotaxis arrangementMobile patent suitsClustered BubblesModifying a Force-Directed GraphForce-directed treeForce-directed graph component
Build Your Own Graph!
graph
viewof graph = {
const nodes = [];
const links = [];
let mouse = null;
const svg = d3.create("svg")
.property("value", {nodes: [], links: []})
.attr("viewBox", [-width / 2, -height / 2, width, height])
.attr("cursor", "crosshair")
.on("mouseleave", mouseleft)
.on("mousemove", mousemoved)
.on("click", clicked);
const simulation = d3.forceSimulation(nodes)
.force("charge", d3.forceManyBody().strength(-60))
.force("link", d3.forceLink(links))
.force("x", d3.forceX())
.force("y", d3.forceY())
.on("tick", ticked);
const dragger = drag(simulation)
.on("start.mouse", mouseleft)
.on("end.mouse", mousemoved);
let link = svg.append("g")
.attr("stroke", "#999")
.selectAll("line");
let mouselink = svg.append("g")
.attr("stroke", "red")
.selectAll("line");
let node = svg.append("g")
.selectAll("circle");
const cursor = svg.append("circle")
.attr("display", "none")
.attr("fill", "none")
.attr("stroke", "red")
.attr("r", mindistance - 5);
function ticked() {
node.attr("cx", d => d.x)
.attr("cy", d => d.y)
link.attr("x1", d => d.source.x)
.attr("y1", d => d.source.y)
.attr("x2", d => d.target.x)
.attr("y2", d => d.target.y);
mouselink = mouselink
.data(mouse ? nodes.filter(node => inrange(mouse, node)) : [])
.join("line")
.attr("x1", mouse && mouse.x)
.attr("y1", mouse && mouse.y)
.attr("x2", d => d.x)
.attr("y2", d => d.y);
cursor
.attr("display", mouse ? null : "none")
.attr("cx", mouse && mouse.x)
.attr("cy", mouse && mouse.y);
}
function mouseleft() {
mouse = null;
}
function mousemoved(event) {
const [x, y] = d3.pointer(event);
mouse = {x, y};
simulation.alpha(0.3).restart();
}
function clicked(event) {
mousemoved.call(this, event);
spawn({x: mouse.x, y: mouse.y});
}
function spawn(source) {
nodes.push(source);
for (const target of nodes) {
if (inrange(source, target)) {
links.push({source, target});
}
}
link = link
.data(links)
.join("line");
node = node
.data(nodes)
.join(
enter => enter.append("circle").attr("r", 0)
.call(enter => enter.transition().attr("r", 5))
.call(dragger),
update => update,
exit => exit.remove()
);
simulation.nodes(nodes);
simulation.force("link").links(links);
simulation.alpha(1).restart();
svg.property("value", {
nodes: nodes.map(d => ({id: d.index})),
links: links.map(d => ({source: d.source.index, target: d.target.index}))
});
svg.dispatch("input");
}
spawn({x: 0, y: 0});
invalidation.then(() => simulation.stop());
return svg.node();
}
inrange = ({x: sx, y: sy}, {x: tx, y: ty}) => Math.hypot(sx - tx, sy - ty) <= mindistance
mindistance = 30
height = 500
function drag(simulation) {
function dragstarted(event) {
if (!event.active) simulation.alphaTarget(0.3).restart();
event.subject.fx = event.subject.x;
event.subject.fy = event.subject.y;
}
function dragged(event) {
event.subject.fx = event.x;
event.subject.fy = event.y;
}
function dragended(event) {
if (!event.active) simulation.alphaTarget(0);
event.subject.fx = null;
event.subject.fy = null;
}
return d3.drag()
.on("start", dragstarted)
.on("drag", dragged)
.on("end", dragended);
}
Purpose-built for displays of data
Observable is your go-to platform for exploring data and creating expressive data visualizations. Use reactive JavaScript notebooks for prototyping and a collaborative canvas for visual data exploration and dashboard creation.
