SVG radial gradient with a circle. Also works with a donut chart -- for example.
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August 29, 2015 14:02
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Radial Gradient
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<!DOCTYPE html> | |
<meta charset='utf-8'> | |
<title>Radial Gradient"</title> | |
<body> | |
<script src="https://cdnjs.cloudflare.com/ajax/libs/d3/3.5.6/d3.min.js"></script> | |
<script> | |
var w = 500, h = 500, | |
r = Math.min(w, h) / 2; | |
var svg = d3.select("body").append("svg") | |
.attr("width", w) | |
.attr("height", h) | |
.append("g") | |
.attr("transform", "translate(" + w/2 + "," + h/2 + ")"); | |
var radialGradient = svg.append("defs") | |
.append("radialGradient") | |
.attr("id", "radial-gradient"); | |
radialGradient.append("stop") | |
.attr("offset", "0%") | |
.attr("stop-color", "red"); | |
radialGradient.append("stop") | |
.attr("offset", "100%") | |
.attr("stop-color", "#fff"); | |
svg.append("circle") | |
.attr("cx", 0) | |
.attr("cy", 0) | |
.attr("r", r) | |
.style("fill", "url(#radial-gradient)"); | |
</script> |
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<!DOCTYPE html> | |
<meta charset='utf-8'> | |
<body> | |
<script src="https://cdnjs.cloudflare.com/ajax/libs/d3/3.5.6/d3.min.js"></script> | |
<script> | |
var dataset = { | |
apples: [53245, 28479, 19697, 24037, 40245], | |
}; | |
var width = 460, | |
height = 300, | |
radius = Math.min(width, height) / 2; | |
var color = d3.scale.category20(); | |
var pie = d3.layout.pie() | |
.sort(null); | |
var arc = d3.svg.arc() | |
.innerRadius(radius - 100) | |
.outerRadius(radius - 50); | |
var svg = d3.select("body").append("svg") | |
.attr("width", width) | |
.attr("height", height) | |
.append("g") | |
.attr("transform", "translate(" + width / 2 + "," + height / 2 + ")"); | |
var grads = svg.append("defs").selectAll("radialGradient").data(pie(dataset.apples)) | |
.enter().append("radialGradient") | |
.attr("gradientUnits", "userSpaceOnUse") | |
.attr("cx", 0) | |
.attr("cy", 0) | |
.attr("r", "100%") | |
.attr("id", function(d, i) { return "grad" + i; }); | |
grads.append("stop").attr("offset", "15%").style("stop-color", function(d, i) { return color(i); }); | |
grads.append("stop").attr("offset", "20%").style("stop-color", "white"); | |
grads.append("stop").attr("offset", "27%").style("stop-color", function(d, i) { return color(i); }); | |
var path = svg.selectAll("path") | |
.data(pie(dataset.apples)) | |
.enter().append("path") | |
.attr("fill", function(d, i) { return "url(#grad" + i + ")"; }) | |
.attr("d", arc); | |
</script> |
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<?xml version="1.0" standalone="no"?> | |
<!DOCTYPE svg PUBLIC "-//W3C//DTD SVG 1.1//EN" | |
"http://www.w3.org/Graphics/SVG/1.1/DTD/svg11.dtd"> | |
<svg width="8cm" height="4cm" viewBox="0 0 800 400" version="1.1" | |
xmlns="http://www.w3.org/2000/svg"> | |
<desc>Example radgrad01 - fill a rectangle by referencing a | |
radial gradient paint server</desc> | |
<g> | |
<defs> | |
<radialGradient id="MyGradient" gradientUnits="userSpaceOnUse" | |
cx="400" cy="200" r="300" fx="400" fy="200"> | |
<stop offset="0%" stop-color="red" /> | |
<stop offset="50%" stop-color="blue" /> | |
<stop offset="100%" stop-color="red" /> | |
</radialGradient> | |
</defs> | |
<!-- Outline the drawing area in blue --> | |
<rect fill="none" stroke="blue" | |
x="1" y="1" width="798" height="398"/> | |
<!-- The rectangle is filled using a radial gradient paint server --> | |
<rect fill="url(#MyGradient)" stroke="black" stroke-width="5" | |
x="100" y="100" width="600" height="200"/> | |
</g> | |
</svg> |
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