#Playground
...that is all
Created
September 28, 2013 10:08
-
-
Save mschmulen/6740579 to your computer and use it in GitHub Desktop.
Playground
This file contains hidden or bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
| <!DOCTYPE html> | |
| <meta charset="utf-8"> | |
| <body> | |
| <div class="chart" id="chart-1"> | |
| <pre class="code">var circle = svg.selectAll("circle"); | |
| </pre> | |
| <button>Run</button> | |
| <svg width="360" height="180"> | |
| <circle class="little" cx="180" cy="45" r="12"></circle> | |
| <circle class="little" cx="60" cy="90" r="12"></circle> | |
| <circle class="little" cx="300" cy="135" r="12"></circle> | |
| <circle class="select" cx="180" cy="45" r="12" style="fill: none; stroke: #ff0000; stroke-opacity: 1; stroke-width: 3px;"></circle> | |
| <circle class="select" cx="60" cy="90" r="12" style="fill: none; stroke: #ff0000; stroke-opacity: 1; stroke-width: 3px;"></circle> | |
| <circle class="select" cx="300" cy="135" r="12" style="fill: none; stroke: #ff0000; stroke-opacity: 1; stroke-width: 3px;"></circle> | |
| </svg> | |
| </div> | |
| <script src="http://d3js.org/d3.v2.min.js?2.9.7"></script> | |
| <script> | |
| var width = 960, | |
| height = 200; | |
| var nodes = d3.range(200).map(function() { return {radius: Math.random() * 12 + 4}; }), | |
| root = nodes[0], | |
| color = d3.scale.category10(); | |
| root.radius = 0; | |
| root.fixed = true; | |
| var force = d3.layout.force() | |
| .gravity(0.05) | |
| .charge(function(d, i) { return i ? 0 : -2000; }) | |
| .nodes(nodes) | |
| .size([width, height]); | |
| force.start(); | |
| var svg = d3.select("body").append("svg:svg") | |
| .attr("width", width) | |
| .attr("height", height); | |
| svg.selectAll("circle") | |
| .data(nodes.slice(1)) | |
| .enter().append("circle") | |
| .attr("r", function(d) { return d.radius; }) | |
| .style("fill", function(d, i) { return color(i % 3); }); | |
| force.on("tick", function(e) { | |
| var q = d3.geom.quadtree(nodes), | |
| i = 0, | |
| n = nodes.length; | |
| while (++i < n) q.visit(collide(nodes[i])); | |
| svg.selectAll("circle") | |
| .attr("cx", function(d) { return d.x; }) | |
| .attr("cy", function(d) { return d.y; }); | |
| }); | |
| svg.on("mousemove", function() { | |
| var p1 = d3.mouse(this); | |
| root.px = p1[0]; | |
| root.py = p1[1]; | |
| force.resume(); | |
| }); | |
| function collide(node) { | |
| var r = node.radius + 16, | |
| nx1 = node.x - r, | |
| nx2 = node.x + r, | |
| ny1 = node.y - r, | |
| ny2 = node.y + r; | |
| return function(quad, x1, y1, x2, y2) { | |
| if (quad.point && (quad.point !== node)) { | |
| var x = node.x - quad.point.x, | |
| y = node.y - quad.point.y, | |
| l = Math.sqrt(x * x + y * y), | |
| r = node.radius + quad.point.radius; | |
| if (l < r) { | |
| l = (l - r) / l * .5; | |
| node.x -= x *= l; | |
| node.y -= y *= l; | |
| quad.point.x += x; | |
| quad.point.y += y; | |
| } | |
| } | |
| return x1 > nx2 || x2 < nx1 || y1 > ny2 || y2 < ny1; | |
| }; | |
| } | |
| </script> |
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment