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forked from lmeyerov's block: force demo
Created
July 6, 2016 04:14
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force demo
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| <!DOCTYPE html> | |
| <head> | |
| <meta charset="utf-8"> | |
| <script src="https://cdnjs.cloudflare.com/ajax/libs/d3/3.5.5/d3.min.js"></script> | |
| <style> | |
| body { margin:0;position:fixed;top:0;right:0;bottom:0;left:0; } | |
| svg { width:100%; height: 100% } | |
| </style> | |
| </head> | |
| <body> | |
| <script> | |
| var w = 960, h = 500; | |
| var n = 10; | |
| var RADIUS = 10; | |
| var ANCHORS = 3; | |
| var vis = d3.select("body").append("svg:svg") | |
| .attr("width", w) | |
| .attr("height", h); | |
| var coords = d3.range(n).map(function (d) { | |
| return {x: Math.random() * w, y: Math.random() * h} | |
| }); | |
| var nodes = [].concat( | |
| d3.range(n).map(function (d) { return {x: coords[d].x, y: coords[d].y}; }), | |
| d3.range(n * ANCHORS).map(function (d) { | |
| var i = d % n; | |
| var angle = 2 * Math.PI * Math.floor(d/n) / ANCHORS; | |
| return { | |
| fixed: true, | |
| anchor: true, | |
| x: coords[i].x + RADIUS * Math.cos(angle), | |
| y: coords[i].y + RADIUS * Math.sin(angle) | |
| }; | |
| })); | |
| var links = [].concat( | |
| d3.range(n * 3).map(function (d) { | |
| return {source: d % n, target: (d * 3) % n}; | |
| }), | |
| d3.range(n * ANCHORS).map(function (d) { | |
| return {source: d % n, target: n + d}; | |
| })); | |
| var force = d3.layout.force() | |
| .nodes(nodes).links(links) | |
| .gravity(.05).distance(100).charge(-100).size([w, h]) | |
| .start(); | |
| var link = vis.selectAll("line.link") | |
| .data(links) | |
| .enter().append("svg:line") | |
| .attr("class", "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; }); | |
| var node_drag = d3.behavior.drag() | |
| .on("dragstart", function () { force.stop(); }) | |
| .on("drag", function (d, i) { | |
| if (!d.anchor) { | |
| d.px += d3.event.dx; | |
| d.py += d3.event.dy; | |
| d.x += d3.event.dx; | |
| d.y += d3.event.dy; | |
| tick(); | |
| } | |
| }) | |
| .on("dragend", function (d, i) { | |
| d.fixed = true; | |
| tick(); | |
| force.resume(); | |
| }); | |
| var node = vis.selectAll("g.node") | |
| .data(nodes) | |
| .enter().append("svg:g") | |
| .attr("class", "node") | |
| .call(node_drag); | |
| node.append("circle") | |
| .attr("class", "circle") | |
| .attr("cx", "-8px") | |
| .attr("cy", "-8px") | |
| .attr("r", function (d) { return d.anchor ? "5px" : "16px"}) | |
| .attr("height", "16px"); | |
| node.append("svg:text") | |
| .attr("class", "nodetext") | |
| .attr("dx", 12) | |
| .attr("dy", ".35em") | |
| .text(function(d) { return d.name }); | |
| force.on("tick", tick); | |
| function tick() { | |
| 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("transform", function(d) { return "translate(" + d.x + "," + d.y + ")"; }); | |
| }; | |
| </script> | |
| </body> |
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