Created
August 28, 2013 10:39
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| <!DOCTYPE html> | |
| <html lang="en"><head><meta http-equiv="Content-Type" content="text/html; charset=UTF-8"> | |
| <meta charset="utf-8"> | |
| <title></title> | |
| <!--<script type="text/javascript" src="./D3 Page Template_files/d3.v3.min.js"></script>--> | |
| <script src="http://d3js.org/d3.v3.min.js"></script> | |
| <style type="text/css"> | |
| div{ | |
| background-color:darkgrey; | |
| width:950px; | |
| border:2px solid black; | |
| text-align:center; | |
| font-family:sans-serif; | |
| } | |
| circle{stroke : black; | |
| } | |
| </style> | |
| </head> | |
| <body> | |
| <div></div> | |
| <div style= "display:inline-block;"> | |
| <button id=start>Start</button><button id=stop>Stop</button> | |
| </div> | |
| <script type="text/javascript"> | |
| var npoints = 50, | |
| width = 500, | |
| t =0, | |
| r = function(th,t){return 1.2+ Math.cos(t+th/3)}, | |
| x = function(th,t){return (1.2+ Math.cos(t+th*3))*Math.cos(th)}, | |
| y = function(th,t){return (1.2+ Math.cos(t+th*3))*Math.sin(th)}; | |
| var thetas = d3.range(npoints).map(function (d){return 2*Math.PI*d/npoints}); | |
| //var colour = d3.scale.linear().domain([-1, 1]).range([0,360]); | |
| var svg = d3.select("div").append("svg") | |
| .attr("width",width) | |
| .attr("height",width); | |
| svg.selectAll("circle").data(thetas).enter().append("circle") | |
| .attr("r",5) | |
| .attr("cx",function(d){return 100*x(d,t)}) | |
| .attr("cy",function(d){return 100*y(d,t)}) | |
| .attr("fill",function(d){return "hsl(" + d*360/(2*Math.PI) + ",100%,50%)"}) | |
| .attr("transform","translate(250,250)") | |
| ; | |
| d3.select("#start").on("click",function(){ | |
| stop=false | |
| var myVar=setInterval(function(){ | |
| t= t + Math.PI/100; | |
| d3.selectAll("circle") | |
| .attr("cx",function(d){return 100*x(d,t)}) | |
| .attr("cy",function(d){return 100*y(d,t)}); | |
| //STOP! | |
| //if (time > dateend){stop = true;} | |
| if (stop == true){clearTimeout(myVar); | |
| stop = false;} | |
| },20); | |
| }); | |
| d3.select("#stop").on("click",function(){stop=true;}); | |
| </script> | |
| </body> | |
| </html> |
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