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force.html
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force.html
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<!DOCTYPE html>
<html>
<head>
<title>Force</title>
<script src="./js/d3.min.js"></script>
</head>
<body>
<svg width="1600" height="800" id="mainsvg" class="svgs"></svg>
<script>
let svg = d3.select('#mainsvg');
var width = svg.attr('width'), height = svg.attr('height');
// var nodes = [{x:0, y:0}, {x:100,y:200}, {x:200,y:200}, {x:300,y:300}, {x:400,y:400}];
let nodes = [{},{},{},{},{}]
let links = [
{"source": 0, "target": 3, weight: 1},
{"source": 3, "target": 0, weight: 1},
{"source": 1, "target": 2, weight: 0.5}
];
let colorScale = d3.scaleDiverging(d3.interpolatePuOr)
.domain([0, nodes.length-1])
function ticked() {
let l = svg.selectAll('line').data(links);
l.enter().append('line')
.attr('stroke', 'black')
.attr('stroke-width', d => d.weight*5)
.merge(l)
.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; });
var u = d3.select('svg')
.selectAll('circle')
.data(nodes);
u.enter()
.append('circle')
.attr('r', 10)
.merge(u)
.attr('cx', function(d) {
return d.x
})
.attr('cy', function(d) {
return d.y
})
.attr('fill', d => colorScale(d.index))
u.exit().remove();
}
function strength(link) {
return link.weight * 0.01;
}
function distance(link) {
return 200 * (1 / link.weight);
}
var simulation = d3.forceSimulation(nodes)
.force('charge', d3.forceManyBody())
.force('center', d3.forceCenter(width / 2, height / 2))
.force("link", d3.forceLink(links).strength(strength).distance(distance))
.alphaTarget(0.1)
.on('tick', ticked);
</script>
</body>
</html>