Example of Custom Arc Tweening
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January 21, 2017 22:15
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Ring of Bars
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| <!DOCTYPE html> | |
| <html> | |
| <head> | |
| <meta charset="utf-8"> | |
| <title>Bars</title> | |
| <style> | |
| body { | |
| background-color: black; | |
| } | |
| .container { | |
| background-color: black; | |
| margin: 0 auto; | |
| display: block; | |
| } | |
| </style> | |
| </head> | |
| <body> | |
| <div id="chart"></div> | |
| <script src="https://d3js.org/d3.v4.min.js"></script> | |
| <script> | |
| var width = 960; | |
| var height = 500; | |
| var padding = {top: 30, right: 30, bottom: 30, left: 30}; | |
| var svg = d3.select("#chart").append("svg") | |
| .attr("width", width) | |
| .attr("height", height) | |
| .attr("class", "container") | |
| .append("g") | |
| .attr("transform", "translate("+width / 2+", "+height / 2+")"); | |
| var rays = 100; | |
| var rayWidth = 0.02; | |
| var cir = Math.PI * 2; | |
| var chunk = cir / rays; | |
| var data = d3.range(rays).map(function(d, i) { | |
| return { | |
| startAngle: (i * chunk), | |
| endAngle: (i * chunk) + rayWidth, | |
| outerRadius: 150 - i | |
| } | |
| }); | |
| var arc = d3.arc() | |
| .innerRadius(50); | |
| var piece = svg | |
| .selectAll(".piece") | |
| .data(data) | |
| .enter() | |
| .append("path") | |
| .attr("class", "piece") | |
| .style("fill", "white") | |
| .transition() | |
| .duration(2000) | |
| .delay(function(d,i) { | |
| return i * 20 | |
| }) | |
| .attrTween("d", arcTween()); | |
| function arcTween() { | |
| return function(d) { | |
| var interpolate = d3.interpolateNumber(51, d.outerRadius); | |
| return function(t) { | |
| d.outerRadius = interpolate(t); | |
| return arc(d); | |
| }; | |
| }; | |
| } | |
| </script> | |
| </body> | |
| </html> |
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