How to increase linkDistance without affecting the node alignment, example: http://mbostock.github.com/d3/talk/20110921/force.html when I try to increase the circle radius and linkDistance the it collapse <script type="text/javascript"> var w = 1280, h = 800, z = d3.scale.category20c(); var force = d3.layout.force() .size([w, h]); var svg = d3.select("#chart").append("svg:svg") .attr("width", w) .attr("height", h); svg.append("svg:rect") .attr("width", w) .attr("height", h); d3.json("flare.json", function(root) { var nodes = flatten(root), links = d3.layout.tree().links(nodes); force .nodes(nodes) .links(links) .start(); var link = svg.selectAll("line") .data(links) .enter().insert("svg:line") .style("stroke", "#999") .style("stroke-width", "1px"); var node = svg.selectAll("circle.node") .data(nodes) .enter().append("svg:circle") .attr("r", 4.5) .style("fill", function(d) { return z(d.parent && d.parent.name); }) .style("stroke", "#000") .call(force.drag); force.on("tick", function(e) { 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; }); node.attr("cx", function(d) { return d.x; }) .attr("cy", function(d) { return d.y; }); }); }); function flatten(root) { var nodes = []; function recurse(node, depth) { if (node.children) { node.children.forEach(function(child) { child.parent = node; recurse(child, depth + 1); }); } node.depth = depth; nodes.push(node); } recurse(root, 1); return nodes; } </script>