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SVG points and 3d transforms
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| <!DOCTYPE html> | |
| <meta charset="utf-8"> | |
| <title>SVG Swarm</title> | |
| <style> | |
| svg { | |
| position: absolute; | |
| top: 0; | |
| } | |
| path { | |
| fill:none; | |
| stroke-width:1; | |
| stroke:#000; | |
| } | |
| </style> | |
| <div id="fps">FPS: <span>?</span></div> | |
| <script src="http://d3js.org/d3.v2.min.js?2.9.1"></script> | |
| <script> | |
| var data = d3.range(20000); | |
| var width = 960, | |
| height = 500; | |
| var x = d3.scale.linear() | |
| .domain([-5, 5]) | |
| .range([0, width]); | |
| var y = d3.scale.linear() | |
| .domain([-5, 5]) | |
| .range([0, height]); | |
| var time0 = Date.now(), | |
| time1; | |
| var fps = d3.select("#fps span"); | |
| var svg = d3.select("body").append("svg") | |
| .attr("width", width) | |
| .attr("height", height); | |
| var g = svg.attr('width', 200).attr('height', 200); | |
| var p = g.selectAll("circle") | |
| .data(data) | |
| .enter() | |
| .append('circle') | |
| .attr('r', 2) | |
| .attr('transform', function(d, i) { return 'translate(' + [Math.round(Math.random() * 200), Math.round(Math.random() * 200)] + ')' }); | |
| var fpsqueue = []; | |
| d3.timer(function() { | |
| g.style('-webkit-transform', function() { | |
| return 'translate3d(' + Math.round(Math.random() * 600) + 'px,' + Math.round(Math.random() * 200) + 'px, 0)' | |
| }); | |
| time1 = Date.now(); | |
| if (fpsqueue.length === 100) { fps.text(d3.mean(fpsqueue).toFixed(3)); fpsqueue = []; } | |
| fpsqueue.push(Math.round(1000 / (time1 - time0))); | |
| time0 = time1; | |
| }); | |
| </script> |
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