版权声明：本文为博主原创文章，未经博主允许不得转载。 https://blog.csdn.net/npf_java/article/details/49184659
<!DOCTYPE html>
<meta charset="utf-8"><body><script src="https://cdnjs.cloudflare.com/ajax/libs/d3/3.5.5/d3.min.js"></script><script>var w = 960,
h = 500,
nodes = [],
node;
var vis = d3.select("body").append("svg")
.attr("width", w)
.attr("height", h);
var force = d3.layout.force()
.nodes(nodes)
.links([])
.size([w, h]);
force.on("tick", function(e) {
vis.selectAll("path")
.attr("transform", function(d) { return "translate(" + d.x + "," + d.y + ")"; });
});
setInterval(function(){// Add a new random shape.
nodes.push({
type: d3.svg.symbolTypes[~~(Math.random() * d3.svg.symbolTypes.length)],
size: Math.random() * 300 + 100
});
// Restart the layout.
force.start();
vis.selectAll("path")
.data(nodes)
.enter().append("path")
.attr("transform", function(d) { return "translate(" + d.x + "," + d.y + ")"; })
.attr("d", d3.svg.symbol()
.size(function(d) { return d.size; })
.type(function(d) { return d.type; }))
.style("fill", "steelblue")
.style("stroke", "white")
.style("stroke-width", "1.5px")
.call(force.drag);
}, 1000);
</script>