Just for fun, swirling circles.
Inspired from @mtaptich's block - 8f8c955a7bcaa3ac2b2f
Last active
October 3, 2016 12:37
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swirling circles
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| <!DOCTYPE html> | |
| <meta charset="utf-8"> | |
| <style type="text/css"> | |
| .circle{ fill-opacity: 0.4;} | |
| </style> | |
| <body> | |
| <script src="//d3js.org/d3.v3.min.js"></script> | |
| <script> | |
| function colorPicker(v) { | |
| if (v == 1) { return "#4575b4"; } | |
| else if (v == 2) { return "#74add1"; } | |
| else if (v == 3) { return "#fee08b"; } | |
| else if (v == 4) { return "#fdae61"; } | |
| else if (v == 5) { return "#f46d43"; } | |
| else if (v == 6) { return "#92c5de"; } | |
| else { return "#d73027"; } | |
| } | |
| var margin = { top: 20, right: 10, bottom: 20, left: 10 }, | |
| width = 900 - margin.left - margin.right, | |
| height = 400 - margin.top - margin.bottom, | |
| pace = 20, | |
| n_limit = 1000; | |
| var svg = d3.select('body').append('svg') | |
| .attr('width', width + margin.left + margin.right) | |
| .attr('height', height + margin.top + margin.bottom) | |
| .append('g') | |
| .attr('transform', 'translate(' + margin.left + ',' + margin.top + ')'); | |
| function go(){ | |
| var ncount = 0 | |
| interval = setInterval(function(){ | |
| var c = svg.append('circle') | |
| .attr('cy', function(d){ return height - 10*Math.random() }) | |
| .attr('cx', function(d){ return 75*Math.random()*(Math.random() < 0.5 ? -3 : 3) + width*0.5}) | |
| .attr('r', function (d) { return 4 }) | |
| .attr("opacity", 0.6) | |
| .style("fill", function (d) { return colorPicker(Math.ceil(6 * Math.random())) }) | |
| c.transition() | |
| .duration(2000) | |
| .attr('cy', height*0.5) | |
| .attr('cx', function(d){ return 75*Math.random()*(Math.random() < 0.5 ? -3 : 3) + width*0.5}) | |
| .ease('linear') | |
| .transition() | |
| .duration(2000) | |
| .attr('cy', 10) | |
| .attr('cx', function(d){ return 75*Math.random()*(Math.random() < 0.5 ? -3 : 3) + width*0.5}) | |
| .ease('linear') | |
| .each("end", function(){ d3.select(this).remove()}); | |
| ncount+=1; | |
| if (ncount>n_limit) clearInterval(interval) | |
| },pace) | |
| } | |
| go() | |
| var go_loop = setInterval(go, 4000 + pace * n_limit) | |
| </script> | |
| </body> |
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