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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