Created
August 15, 2013 20:18
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<!DOCTYPE html> | |
<html> | |
<head> | |
<title></title> | |
<style> | |
body, html { | |
margin: 0; | |
} | |
/* show or hide the foci for debugging */ | |
.foci-1, .foci-2{ | |
display: block; | |
fill: green; | |
} | |
.group-1 { | |
fill: red; | |
} | |
.group-2 { | |
fill: blue; | |
} | |
</style> | |
</head> | |
<body> | |
<script src="http://d3js.org/d3.v3.min.js" charset="utf-8"></script> | |
<script> | |
var w = 800 | |
, h = 500 | |
, svg = d3.select('body').append('svg') | |
.attr({ width: w, height: h }) | |
, Force = function(nodes, links){ | |
return d3.layout.force() | |
.nodes(nodes) | |
.links(links) | |
.gravity(0) | |
.size([w, h]) | |
.linkDistance(0) | |
.linkStrength(0.1) | |
.friction(0.9) | |
.charge(function(d, i){ return d.charge }) | |
} | |
, Nodes = function(num, id, name){ | |
return d3.range(num).map(function(d){ | |
return { | |
id : id | |
, x : Math.random() * w | |
, y : Math.random() * h | |
, charge : -10 | |
, name : name | |
} | |
}) | |
} | |
, Foci = function(x, y, name){ | |
return { x : x, y : y, charge : 0, fixed : true, name : name } | |
} | |
, Links = function(nodes, foci){ | |
return nodes.map(function(node){ | |
return { source : node, target : foci } | |
}) | |
} | |
, fill = function(d){ | |
if(d) return 'red' | |
else return 'blue' | |
} | |
, nodes1 = Nodes(100, 0, 'group-1') | |
, nodes2 = Nodes(1, 1, 'group-2') | |
, foci1 = Foci(w / 2, h / 2, 'foci-1') | |
, foci2 = Foci(w / 2 + 200, h / 2, 'foci-2') | |
, links1 = Links(nodes1, foci1) | |
, links2 = Links(nodes2, foci2) | |
, all = nodes1.concat(nodes2).concat([foci1, foci2]) | |
, force = Force(all, links1.concat(links2)) | |
force.on('tick', function(){ | |
force.alpha(0.1) | |
svg.selectAll('circle') | |
.attr('cx', function(d){ return d.x }) | |
.attr('cy', function(d){ return d.y }) | |
}) | |
svg.selectAll('circle') | |
.data(all) | |
.enter().append('circle') | |
.attr({ | |
cx: function(d) { return d.x } | |
, cy: function(d){ return d.y } | |
, r: 4 | |
, 'class': function(d){ return d.name } | |
}) | |
.style({ | |
stroke: 'white' | |
, 'stroke-width': 1 | |
}) | |
force.start() | |
// d3.select('.foci-1').drag() | |
d3.select('.foci-2') | |
.transition() | |
.ease('cubic-in-out') | |
.duration(2000) | |
.tween('dataTween', function(d){ | |
var ix = d3.interpolate(d.x, w / 2) | |
var iy = d3.interpolate(d.y, h / 2) | |
return function(t){ | |
d.x = d.px = ix(t) | |
d.y = d.py = iy(t) | |
} | |
}) | |
setTimeout(function(){ | |
// link the nodes to the first foci after 4 seconds | |
var nodes = nodes1.concat(nodes2) | |
var links = Links(nodes, foci1) | |
force.links(links) | |
}, 4000) | |
</script> | |
</body> | |
</html> |
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