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Last active Jun 20, 2019

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Bounded Force Layout
license: gpl-3.0

This D3 example shows how to constrain the position of nodes within the rectangular bounds of the containing SVG element. As a side-effect of updating the node's cx and cy attributes, we update the node positions to be within the range [radius, width - radius] for x, [radius, height - radius] for y. If you prefer, you could use the each operator to do this as a separate step, rather than as a side-effect of setting attributes.

{
"nodes": [
{"name": "Myriel", "group": 1},
{"name": "Napoleon", "group": 1},
{"name": "Mlle.Baptistine", "group": 1},
{"name": "Mme.Magloire", "group": 1},
{"name": "CountessdeLo", "group": 1},
{"name": "Geborand", "group": 1},
{"name": "Champtercier", "group": 1},
{"name": "Cravatte", "group": 1},
{"name": "Count", "group": 1},
{"name": "OldMan", "group": 1},
{"name": "Labarre", "group": 2},
{"name": "Valjean", "group": 2},
{"name": "Marguerite", "group": 3},
{"name": "Mme.deR", "group": 2},
{"name": "Isabeau", "group": 2},
{"name": "Gervais", "group": 2},
{"name": "Tholomyes", "group": 3},
{"name": "Listolier", "group": 3},
{"name": "Fameuil", "group": 3},
{"name": "Blacheville", "group": 3},
{"name": "Favourite", "group": 3},
{"name": "Dahlia", "group": 3},
{"name": "Zephine", "group": 3},
{"name": "Fantine", "group": 3},
{"name": "Mme.Thenardier", "group": 4},
{"name": "Thenardier", "group": 4},
{"name": "Cosette", "group": 5},
{"name": "Javert", "group": 4},
{"name": "Fauchelevent", "group": 0},
{"name": "Bamatabois", "group": 2},
{"name": "Perpetue", "group": 3},
{"name": "Simplice", "group": 2},
{"name": "Scaufflaire", "group": 2},
{"name": "Woman1", "group": 2},
{"name": "Judge", "group": 2},
{"name": "Champmathieu", "group": 2},
{"name": "Brevet", "group": 2},
{"name": "Chenildieu", "group": 2},
{"name": "Cochepaille", "group": 2},
{"name": "Pontmercy", "group": 4},
{"name": "Boulatruelle", "group": 6},
{"name": "Eponine", "group": 4},
{"name": "Anzelma", "group": 4},
{"name": "Woman2", "group": 5},
{"name": "MotherInnocent", "group": 0},
{"name": "Gribier", "group": 0},
{"name": "Jondrette", "group": 7},
{"name": "Mme.Burgon", "group": 7},
{"name": "Gavroche", "group": 8},
{"name": "Gillenormand", "group": 5},
{"name": "Magnon", "group": 5},
{"name": "Mlle.Gillenormand", "group": 5},
{"name": "Mme.Pontmercy", "group": 5},
{"name": "Mlle.Vaubois", "group": 5},
{"name": "Lt.Gillenormand", "group": 5},
{"name": "Marius", "group": 8},
{"name": "BaronessT", "group": 5},
{"name": "Mabeuf", "group": 8},
{"name": "Enjolras", "group": 8},
{"name": "Combeferre", "group": 8},
{"name": "Prouvaire", "group": 8},
{"name": "Feuilly", "group": 8},
{"name": "Courfeyrac", "group": 8},
{"name": "Bahorel", "group": 8},
{"name": "Bossuet", "group": 8},
{"name": "Joly", "group": 8},
{"name": "Grantaire", "group": 8},
{"name": "MotherPlutarch", "group": 9},
{"name": "Gueulemer", "group": 4},
{"name": "Babet", "group": 4},
{"name": "Claquesous", "group": 4},
{"name": "Montparnasse", "group": 4},
{"name": "Toussaint", "group": 5},
{"name": "Child1", "group": 10},
{"name": "Child2", "group": 10},
{"name": "Brujon", "group": 4},
{"name": "Mme.Hucheloup", "group": 8}
],
"links": [
{"source": 1, "target": 0, "value": 1},
{"source": 2, "target": 0, "value": 8},
{"source": 3, "target": 0, "value": 10},
{"source": 3, "target": 2, "value": 6},
{"source": 4, "target": 0, "value": 1},
{"source": 5, "target": 0, "value": 1},
{"source": 6, "target": 0, "value": 1},
{"source": 7, "target": 0, "value": 1},
{"source": 8, "target": 0, "value": 2},
{"source": 9, "target": 0, "value": 1},
{"source": 11, "target": 10, "value": 1},
{"source": 11, "target": 3, "value": 3},
{"source": 11, "target": 2, "value": 3},
{"source": 11, "target": 0, "value": 5},
{"source": 12, "target": 11, "value": 1},
{"source": 13, "target": 11, "value": 1},
{"source": 14, "target": 11, "value": 1},
{"source": 15, "target": 11, "value": 1},
{"source": 17, "target": 16, "value": 4},
{"source": 18, "target": 16, "value": 4},
{"source": 18, "target": 17, "value": 4},
{"source": 19, "target": 16, "value": 4},
{"source": 19, "target": 17, "value": 4},
{"source": 19, "target": 18, "value": 4},
{"source": 20, "target": 16, "value": 3},
{"source": 20, "target": 17, "value": 3},
{"source": 20, "target": 18, "value": 3},
{"source": 20, "target": 19, "value": 4},
{"source": 21, "target": 16, "value": 3},
{"source": 21, "target": 17, "value": 3},
{"source": 21, "target": 18, "value": 3},
{"source": 21, "target": 19, "value": 3},
{"source": 21, "target": 20, "value": 5},
{"source": 22, "target": 16, "value": 3},
{"source": 22, "target": 17, "value": 3},
{"source": 22, "target": 18, "value": 3},
{"source": 22, "target": 19, "value": 3},
{"source": 22, "target": 20, "value": 4},
{"source": 22, "target": 21, "value": 4},
{"source": 23, "target": 16, "value": 3},
{"source": 23, "target": 17, "value": 3},
{"source": 23, "target": 18, "value": 3},
{"source": 23, "target": 19, "value": 3},
{"source": 23, "target": 20, "value": 4},
{"source": 23, "target": 21, "value": 4},
{"source": 23, "target": 22, "value": 4},
{"source": 23, "target": 12, "value": 2},
{"source": 23, "target": 11, "value": 9},
{"source": 24, "target": 23, "value": 2},
{"source": 24, "target": 11, "value": 7},
{"source": 25, "target": 24, "value": 13},
{"source": 25, "target": 23, "value": 1},
{"source": 25, "target": 11, "value": 12},
{"source": 26, "target": 24, "value": 4},
{"source": 26, "target": 11, "value": 31},
{"source": 26, "target": 16, "value": 1},
{"source": 26, "target": 25, "value": 1},
{"source": 27, "target": 11, "value": 17},
{"source": 27, "target": 23, "value": 5},
{"source": 27, "target": 25, "value": 5},
{"source": 27, "target": 24, "value": 1},
{"source": 27, "target": 26, "value": 1},
{"source": 28, "target": 11, "value": 8},
{"source": 28, "target": 27, "value": 1},
{"source": 29, "target": 23, "value": 1},
{"source": 29, "target": 27, "value": 1},
{"source": 29, "target": 11, "value": 2},
{"source": 30, "target": 23, "value": 1},
{"source": 31, "target": 30, "value": 2},
{"source": 31, "target": 11, "value": 3},
{"source": 31, "target": 23, "value": 2},
{"source": 31, "target": 27, "value": 1},
{"source": 32, "target": 11, "value": 1},
{"source": 33, "target": 11, "value": 2},
{"source": 33, "target": 27, "value": 1},
{"source": 34, "target": 11, "value": 3},
{"source": 34, "target": 29, "value": 2},
{"source": 35, "target": 11, "value": 3},
{"source": 35, "target": 34, "value": 3},
{"source": 35, "target": 29, "value": 2},
{"source": 36, "target": 34, "value": 2},
{"source": 36, "target": 35, "value": 2},
{"source": 36, "target": 11, "value": 2},
{"source": 36, "target": 29, "value": 1},
{"source": 37, "target": 34, "value": 2},
{"source": 37, "target": 35, "value": 2},
{"source": 37, "target": 36, "value": 2},
{"source": 37, "target": 11, "value": 2},
{"source": 37, "target": 29, "value": 1},
{"source": 38, "target": 34, "value": 2},
{"source": 38, "target": 35, "value": 2},
{"source": 38, "target": 36, "value": 2},
{"source": 38, "target": 37, "value": 2},
{"source": 38, "target": 11, "value": 2},
{"source": 38, "target": 29, "value": 1},
{"source": 39, "target": 25, "value": 1},
{"source": 40, "target": 25, "value": 1},
{"source": 41, "target": 24, "value": 2},
{"source": 41, "target": 25, "value": 3},
{"source": 42, "target": 41, "value": 2},
{"source": 42, "target": 25, "value": 2},
{"source": 42, "target": 24, "value": 1},
{"source": 43, "target": 11, "value": 3},
{"source": 43, "target": 26, "value": 1},
{"source": 43, "target": 27, "value": 1},
{"source": 44, "target": 28, "value": 3},
{"source": 44, "target": 11, "value": 1},
{"source": 45, "target": 28, "value": 2},
{"source": 47, "target": 46, "value": 1},
{"source": 48, "target": 47, "value": 2},
{"source": 48, "target": 25, "value": 1},
{"source": 48, "target": 27, "value": 1},
{"source": 48, "target": 11, "value": 1},
{"source": 49, "target": 26, "value": 3},
{"source": 49, "target": 11, "value": 2},
{"source": 50, "target": 49, "value": 1},
{"source": 50, "target": 24, "value": 1},
{"source": 51, "target": 49, "value": 9},
{"source": 51, "target": 26, "value": 2},
{"source": 51, "target": 11, "value": 2},
{"source": 52, "target": 51, "value": 1},
{"source": 52, "target": 39, "value": 1},
{"source": 53, "target": 51, "value": 1},
{"source": 54, "target": 51, "value": 2},
{"source": 54, "target": 49, "value": 1},
{"source": 54, "target": 26, "value": 1},
{"source": 55, "target": 51, "value": 6},
{"source": 55, "target": 49, "value": 12},
{"source": 55, "target": 39, "value": 1},
{"source": 55, "target": 54, "value": 1},
{"source": 55, "target": 26, "value": 21},
{"source": 55, "target": 11, "value": 19},
{"source": 55, "target": 16, "value": 1},
{"source": 55, "target": 25, "value": 2},
{"source": 55, "target": 41, "value": 5},
{"source": 55, "target": 48, "value": 4},
{"source": 56, "target": 49, "value": 1},
{"source": 56, "target": 55, "value": 1},
{"source": 57, "target": 55, "value": 1},
{"source": 57, "target": 41, "value": 1},
{"source": 57, "target": 48, "value": 1},
{"source": 58, "target": 55, "value": 7},
{"source": 58, "target": 48, "value": 7},
{"source": 58, "target": 27, "value": 6},
{"source": 58, "target": 57, "value": 1},
{"source": 58, "target": 11, "value": 4},
{"source": 59, "target": 58, "value": 15},
{"source": 59, "target": 55, "value": 5},
{"source": 59, "target": 48, "value": 6},
{"source": 59, "target": 57, "value": 2},
{"source": 60, "target": 48, "value": 1},
{"source": 60, "target": 58, "value": 4},
{"source": 60, "target": 59, "value": 2},
{"source": 61, "target": 48, "value": 2},
{"source": 61, "target": 58, "value": 6},
{"source": 61, "target": 60, "value": 2},
{"source": 61, "target": 59, "value": 5},
{"source": 61, "target": 57, "value": 1},
{"source": 61, "target": 55, "value": 1},
{"source": 62, "target": 55, "value": 9},
{"source": 62, "target": 58, "value": 17},
{"source": 62, "target": 59, "value": 13},
{"source": 62, "target": 48, "value": 7},
{"source": 62, "target": 57, "value": 2},
{"source": 62, "target": 41, "value": 1},
{"source": 62, "target": 61, "value": 6},
{"source": 62, "target": 60, "value": 3},
{"source": 63, "target": 59, "value": 5},
{"source": 63, "target": 48, "value": 5},
{"source": 63, "target": 62, "value": 6},
{"source": 63, "target": 57, "value": 2},
{"source": 63, "target": 58, "value": 4},
{"source": 63, "target": 61, "value": 3},
{"source": 63, "target": 60, "value": 2},
{"source": 63, "target": 55, "value": 1},
{"source": 64, "target": 55, "value": 5},
{"source": 64, "target": 62, "value": 12},
{"source": 64, "target": 48, "value": 5},
{"source": 64, "target": 63, "value": 4},
{"source": 64, "target": 58, "value": 10},
{"source": 64, "target": 61, "value": 6},
{"source": 64, "target": 60, "value": 2},
{"source": 64, "target": 59, "value": 9},
{"source": 64, "target": 57, "value": 1},
{"source": 64, "target": 11, "value": 1},
{"source": 65, "target": 63, "value": 5},
{"source": 65, "target": 64, "value": 7},
{"source": 65, "target": 48, "value": 3},
{"source": 65, "target": 62, "value": 5},
{"source": 65, "target": 58, "value": 5},
{"source": 65, "target": 61, "value": 5},
{"source": 65, "target": 60, "value": 2},
{"source": 65, "target": 59, "value": 5},
{"source": 65, "target": 57, "value": 1},
{"source": 65, "target": 55, "value": 2},
{"source": 66, "target": 64, "value": 3},
{"source": 66, "target": 58, "value": 3},
{"source": 66, "target": 59, "value": 1},
{"source": 66, "target": 62, "value": 2},
{"source": 66, "target": 65, "value": 2},
{"source": 66, "target": 48, "value": 1},
{"source": 66, "target": 63, "value": 1},
{"source": 66, "target": 61, "value": 1},
{"source": 66, "target": 60, "value": 1},
{"source": 67, "target": 57, "value": 3},
{"source": 68, "target": 25, "value": 5},
{"source": 68, "target": 11, "value": 1},
{"source": 68, "target": 24, "value": 1},
{"source": 68, "target": 27, "value": 1},
{"source": 68, "target": 48, "value": 1},
{"source": 68, "target": 41, "value": 1},
{"source": 69, "target": 25, "value": 6},
{"source": 69, "target": 68, "value": 6},
{"source": 69, "target": 11, "value": 1},
{"source": 69, "target": 24, "value": 1},
{"source": 69, "target": 27, "value": 2},
{"source": 69, "target": 48, "value": 1},
{"source": 69, "target": 41, "value": 1},
{"source": 70, "target": 25, "value": 4},
{"source": 70, "target": 69, "value": 4},
{"source": 70, "target": 68, "value": 4},
{"source": 70, "target": 11, "value": 1},
{"source": 70, "target": 24, "value": 1},
{"source": 70, "target": 27, "value": 1},
{"source": 70, "target": 41, "value": 1},
{"source": 70, "target": 58, "value": 1},
{"source": 71, "target": 27, "value": 1},
{"source": 71, "target": 69, "value": 2},
{"source": 71, "target": 68, "value": 2},
{"source": 71, "target": 70, "value": 2},
{"source": 71, "target": 11, "value": 1},
{"source": 71, "target": 48, "value": 1},
{"source": 71, "target": 41, "value": 1},
{"source": 71, "target": 25, "value": 1},
{"source": 72, "target": 26, "value": 2},
{"source": 72, "target": 27, "value": 1},
{"source": 72, "target": 11, "value": 1},
{"source": 73, "target": 48, "value": 2},
{"source": 74, "target": 48, "value": 2},
{"source": 74, "target": 73, "value": 3},
{"source": 75, "target": 69, "value": 3},
{"source": 75, "target": 68, "value": 3},
{"source": 75, "target": 25, "value": 3},
{"source": 75, "target": 48, "value": 1},
{"source": 75, "target": 41, "value": 1},
{"source": 75, "target": 70, "value": 1},
{"source": 75, "target": 71, "value": 1},
{"source": 76, "target": 64, "value": 1},
{"source": 76, "target": 65, "value": 1},
{"source": 76, "target": 66, "value": 1},
{"source": 76, "target": 63, "value": 1},
{"source": 76, "target": 62, "value": 1},
{"source": 76, "target": 48, "value": 1},
{"source": 76, "target": 58, "value": 1}
]
}
<!DOCTYPE html>
<meta charset="utf-8">
<style>
circle {
stroke-width: 1.5px;
}
line {
stroke: #999;
}
</style>
<body>
<script src="//d3js.org/d3.v3.min.js"></script>
<script>
var width = 960,
height = 500,
radius = 6;
var fill = d3.scale.category20();
var force = d3.layout.force()
.gravity(.05)
.charge(-240)
.linkDistance(50)
.size([width, height]);
var svg = d3.select("body").append("svg")
.attr("width", width)
.attr("height", height);
d3.json("graph.json", function(error, graph) {
if (error) throw error;
var link = svg.selectAll("line")
.data(graph.links)
.enter().append("line");
var node = svg.selectAll("circle")
.data(graph.nodes)
.enter().append("circle")
.attr("r", radius - .75)
.style("fill", function(d) { return fill(d.group); })
.style("stroke", function(d) { return d3.rgb(fill(d.group)).darker(); })
.call(force.drag);
force
.nodes(graph.nodes)
.links(graph.links)
.on("tick", tick)
.start();
function tick() {
node.attr("cx", function(d) { return d.x = Math.max(radius, Math.min(width - radius, d.x)); })
.attr("cy", function(d) { return d.y = Math.max(radius, Math.min(height - radius, d.y)); });
link.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; });
}
});
</script>
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