function drawChart() {
const links = data.links.map(d => Object.create(d))
let existing_users = []
for (let link of links){
existing_users.push(link.source);
existing_users.push(link.target);
}
let nodes = data.nodes.map(d => Object.create(d))
nodes = nodes.filter( d => existing_users.includes(d.id))
console.log(existing_users)
console.log(nodes.length)
let nodesRadius = {}
let degreeSize = d3.scaleLinear()
.domain([d3.min(nodes, d => d.degree),d3.max(nodes, d => d.degree)])
.range([5,20]);
nodes.forEach(function(d, i) {
nodesRadius[d.id] = degreeSize(d.degree);
})
const radius = 5;
var tooltip = d3.select("body")
.append("div")
.attr("class", "tooltip")
.style("opacity", 0);
const simulation = d3.forceSimulation(nodes)
.force("link", d3.forceLink(links).id(d => d.id))
.force("charge", d3.forceManyBody().strength([-10]).distanceMax([500]))
.force("center", d3.forceCenter(width/2, height/2));
const svg = d3.create("svg")
.attr("viewBox", [0, 0, width, height])
const link = svg.append("g")
.attr("stroke", "#aaa")
.attr("stroke-opacity", 0.3)
.selectAll("line")
.data(links)
.join("line")
.attr("stroke-width", d => Math.sqrt(d.value) / 2);
const node = svg.append("g")
.attr("stroke", "#000")
.selectAll("circle")
.data(nodes)
.join("circle")
.attr("r", d => nodesRadius[d.id])
.attr("fill", color)
.call(drag(simulation))
.on('mouseover.fade', fade(0.1))
.on('mouseout.fade', fade(1));
const textElems = svg.append('g')
.selectAll('text')
.data(nodes)
.join('text')
.text(d => d.id)
.attr('font-size',12)
.attr('font-size',12)
.call(drag(simulation))
.on('mouseover.fade', fade(0.1))
.on('mouseout.fade', fade(1));
simulation.on("tick", () => {
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);
node
.attr("cx", function(d) { return d.x = Math.max((radius+1), Math.min(width - (radius+1), d.x)); })
.attr("cy", function(d) { return d.y = Math.max((radius+1), Math.min(height - (radius+1), d.y)); });
textElems
.attr("x", d => d.x + 10)
.attr("y", d => d.y)
.attr("visibility", "hidden");
});
function fade(opacity) {
return d => {
node.style('opacity', function (o) { return isConnected(d, o) ? 1 : opacity });
textElems.style('visibility', function (o) { return isConnected(d, o) ? "visible" : "hidden" });
link.style('stroke-opacity', o => (o.source === d || o.target === d ? 1 : opacity));
if(opacity === 1){
node.style('opacity', 1)
textElems.style('visibility', 'hidden')
link.style('stroke-opacity', 0.3)
}
};
}
const linkedByIndex = {};
links.forEach(d => {
linkedByIndex[`${d.source.index},${d.target.index}`] = 1;
});
function isConnected(a, b) {
return linkedByIndex[`${a.index},${b.index}`] || linkedByIndex[`${b.index},${a.index}`] || a.index === b.index;
}
invalidation.then(() => simulation.stop());
return svg.node()
}
color = {
const scale = d3.scaleOrdinal(["#ff4040","#40ff40","#4040ff","#ff4040"]);
return d => scale(d.kind)
}
data = FileAttachment("data@5.json").json()
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