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ease delay
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| license: mit |
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.
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| <!DOCTYPE html> | |
| <head> | |
| <meta charset="utf-8"> | |
| <script src="https://d3js.org/d3.v4.min.js"></script> | |
| <style> | |
| body { margin:0;position:fixed;top:0;right:0;bottom:0;left:0; } | |
| </style> | |
| </head> | |
| <body> | |
| <script> | |
| console.clear() | |
| function delayEase(t, e) { | |
| // the polyInOut function from d3.ease | |
| // https://github.com/d3/d3-ease/blob/master/src/poly.js | |
| return ((t *= 2) <= 1 ? Math.pow(t, e) : 2 - Math.pow(2 - t, e)) / 2; | |
| } | |
| let exp = 0.5 // see https://github.com/d3/d3-ease/blob/master/src/poly.js#L27 | |
| let arr = [0,1,2,3,4,5,6,7] | |
| let len = arr.length | |
| let svg = d3.select("body").append("svg") | |
| .attr("width", 1000) | |
| .attr("height", 500) | |
| let circles = svg.selectAll("circle") | |
| .data(arr) | |
| .enter() | |
| .append("circle") | |
| .attr("cx", d => (d * 40) + 40) | |
| .attr("cy", 50) | |
| .attr("r", 10) | |
| .style("fill", "black") | |
| circles.transition() | |
| .duration(5000) | |
| .delay(function(d,i) { | |
| let delay = 5000 * (delayEase((i/len), exp)) | |
| console.log(delay) | |
| return delay | |
| }) | |
| .attr("cy", 450) | |
| </script> | |
| </body> |
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