Published
Edited
Dec 9, 2021
data = FileAttachment("GOTb3otherFamily.json").json()
chartNodes = {
// Create a copy of the node data, so we don't overwrite the original array (simulating forces will change the array)
const nodes = data.nodes.map(d => Object.create(d));
const nodesCopy = nodes;
const links = data.links.map(d => Object.create(d));
const simulation = d3.forceSimulation(nodes)
.force("center", d3.forceCenter(width/2, height/2))
.force("link", d3.forceLink(links).id(d => d.id))
.force("charge", d3.forceManyBody())
;
const svg = d3.create("svg")
.attr("viewBox", [0, 0, width, height]);
// Bind the data and draw each of the nodes, note that cx and cy are all currently set to the same position
const node = svg.append("g")
.attr("stroke", "#fff")
.attr("stroke-width", 1.5)
.selectAll("circle")
.data(nodes)
.join("circle")
.attr("r", 8)
.attr("fill", color)
.attr("cx", width/2 )
.attr("cy", height/2);
const link = svg.append("g")
.selectAll("line")
.data(links)
.join("line")
.attr("stroke", "#999")
.attr("stroke-opacity", 0.4)
// Add the name of the character to each node, so that it is revealed on mouseover
node.append("title")
.text(d => d.name);
// TODO: Indicate how we should update the graph for each tick
simulation.on("tick", () => {
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);
});
invalidation.then(() => simulation.stop());
return svg.node();
}
height = 1000
color = {
const scale = d3.scaleOrdinal(d3.schemeCategory10);
return d => scale(d.group);
}
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);
}
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