-
-
Save chetan51/4109241 to your computer and use it in GitHub Desktop.
Circles
This file contains 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> | |
| <html> | |
| <head> | |
| <meta http-equiv="Content-Type" content="text/html;charset=utf-8"/> | |
| </head> | |
| <body> | |
| <script type="text/javascript" src="http://mbostock.github.com/d3/d3.js?2.5.0"></script> | |
| <script type="text/javascript"> | |
| var w = 960, | |
| h = 500; | |
| var svg = d3.select("body").append("svg:svg") | |
| .attr("width", w) | |
| .attr("height", h); | |
| var speed_multiplier = 10; | |
| var circle = svg.selectAll("circle") | |
| .data(d3.range(1000).map(function() { | |
| return { | |
| x: w * Math.random(), | |
| y: h * Math.random(), | |
| dx: (Math.random() - .5) * speed_multiplier, | |
| dy: (Math.random() - .5) * speed_multiplier | |
| }; | |
| })) | |
| .enter().append("svg:circle") | |
| .attr("r", 2.5) | |
| .attr("cx", function(d) { return d.x }) | |
| .attr("cy", function(d) { return d.y }); | |
| var text = svg.append("svg:text") | |
| .attr("x", 20) | |
| .attr("y", 20); | |
| var start = Date.now(), | |
| frames = 0; | |
| d3.timer(function() { | |
| // Update the FPS meter. | |
| var now = Date.now(), duration = now - start; | |
| text.text(~~(++frames * 1000 / duration)); | |
| if (duration >= 1000) frames = 0, start = now; | |
| // Update the circle positions. | |
| circle | |
| .attr("cx", function(d) { d.x += d.dx; if (d.x > w) d.x -= w; else if (d.x < 0) d.x += w; return d.x; }) | |
| .attr("cy", function(d) { d.y += d.dy; if (d.y > h) d.y -= h; else if (d.y < 0) d.y += h; return d.y; }); | |
| }); | |
| </script> | |
| </body> | |
| </html> |
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment