25:["$","title",null,{"children":"Zoomable sunburst | drbagwell | Observable"}] 49:T1001,chart = { // Specify the chart’s dimensions. const width = 928; const height = width; const radius = width / 6; // Create the color scale. const color = d3.scaleOrdinal(d3.quantize(d3.interpolateRainbow, data.children.length + 1)); // Compute the layout. const hierarchy = d3.hierarchy(data) .sum(d => d.value) .sort((a, b) => b.value - a.value); const root = d3.partition() .size([2 * Math.PI, hierarchy.height + 1]) (hierarchy); root.each(d => d.current = d); // Create the arc generator. const arc = d3.arc() .startAngle(d => d.x0) .endAngle(d => d.x1) .padAngle(d => Math.min((d.x1 - d.x0) / 2, 0.005)) .padRadius(radius * 1.5) .innerRadius(d => d.y0 * radius) .outerRadius(d => Math.max(d.y0 * radius, d.y1 * radius - 1)) // Create the SVG container. const svg = d3.create("svg") .attr("viewBox", [-width / 2, -height / 2, width, width]) .style("font", "10px sans-serif"); // Append the arcs. const path = svg.append("g") .selectAll("path") .data(root.descendants().slice(1)) .join("path") .attr("fill", d => { while (d.depth > 1) d = d.parent; return color(d.data.name); }) .attr("fill-opacity", d => arcVisible(d.current) ? (d.children ? 0.6 : 0.4) : 0) .attr("pointer-events", d => arcVisible(d.current) ? "auto" : "none") .attr("d", d => arc(d.current)); // Make them clickable if they have children. path.filter(d => d.children) .style("cursor", "pointer") .on("click", clicked); const format = d3.format(",d"); path.append("title") .text(d => `${d.ancestors().map(d => d.data.name).reverse().join("/")}\n${format(d.value)}`); const label = svg.append("g") .attr("pointer-events", "none") .attr("text-anchor", "middle") .style("user-select", "none") .selectAll("text") .data(root.descendants().slice(1)) .join("text") .attr("dy", "0.35em") .attr("fill-opacity", d => +labelVisible(d.current)) .attr("transform", d => labelTransform(d.current)) .text(d => d.data.name); const parent = svg.append("circle") .datum(root) .attr("r", radius) .attr("fill", "none") .attr("pointer-events", "all") .on("click", clicked); // Handle zoom on click. function clicked(event, p) { parent.datum(p.parent || root); root.each(d => d.target = { x0: Math.max(0, Math.min(1, (d.x0 - p.x0) / (p.x1 - p.x0))) * 2 * Math.PI, x1: Math.max(0, Math.min(1, (d.x1 - p.x0) / (p.x1 - p.x0))) * 2 * Math.PI, y0: Math.max(0, d.y0 - p.depth), y1: Math.max(0, d.y1 - p.depth) }); const t = svg.transition().duration(750); // Transition the data on all arcs, even the ones that aren’t visible, // so that if this transition is interrupted, entering arcs will start // the next transition from the desired position. path.transition(t) .tween("data", d => { const i = d3.interpolate(d.current, d.target); return t => d.current = i(t); }) .filter(function(d) { return +this.getAttribute("fill-opacity") || arcVisible(d.target); }) .attr("fill-opacity", d => arcVisible(d.target) ? (d.children ? 0.6 : 0.4) : 0) .attr("pointer-events", d => arcVisible(d.target) ? "auto" : "none") .attrTween("d", d => () => arc(d.current)); label.filter(function(d) { return +this.getAttribute("fill-opacity") || labelVisible(d.target); }).transition(t) .attr("fill-opacity", d => +labelVisible(d.target)) .attrTween("transform", d => () => labelTransform(d.current)); } function arcVisible(d) { return d.y1 <= 3 && d.y0 >= 1 && d.x1 > d.x0; } function labelVisible(d) { return d.y1 <= 3 && d.y0 >= 1 && (d.y1 - d.y0) * (d.x1 - d.x0) > 0.03; } function labelTransform(d) { const x = (d.x0 + d.x1) / 2 * 180 / Math.PI; const y = (d.y0 + d.y1) / 2 * radius; return `rotate(${x - 90}) translate(${y},0) rotate(${x < 180 ? 0 : 180})`; } return svg.node(); }4a:[{"id":"e65374209781891f37dea1e7a6e1c5e020a3009b8aedf113b4c80942018887a1176ad4945cf14444603ff91d3da371b3b0d72419fa8d2ee0f6e815732475d5de","href":"https://static.observableusercontent.com/files/e65374209781891f37dea1e7a6e1c5e020a3009b8aedf113b4c80942018887a1176ad4945cf14444603ff91d3da371b3b0d72419fa8d2ee0f6e815732475d5de","name":"flare-2.json","type":"application/octet-stream","lastModified":1704950190968.472,"size":11634}] 29:{"id":"0a8a52c83b40a22c","slug":null,"title":"Zoomable sunburst","thumbnail":"cdb8500677ad8c38b3065879cef4c690f8502d70a1535c0df0996d81d8f210ce","access_level":"public","create_time":"$D2024-01-11T05:16:30.968Z","update_time":"$D2024-01-11T05:16:30.968Z","view_time":null,"first_public_time":"$D2024-01-11T05:16:30.968Z","has_unpublished_edits":null,"fork":{"id":"86ddbc29bd33f9d6","slug":"zoomable-sunburst","title":"Zoomable sunburst","owner":{"id":"863951e3ebe4c0ae","login":"d3","name":"D3"}},"stars":0,"starred":false,"owner":{"type":"team","id":"3df590ff6b5ddeb9","login":"drbagwell","name":"","avatar_url":"https://avatars-next.observableusercontent.com/44febcf38b1a0e9ddfc1c4d6c2df40de4227fc13f07d386ae87a7053ec79b220","tier":"starter_2024","bio":"","followed_by_you":false,"follows_you":false},"version":377,"publish_version":null,"role":null,"authored":false,"authors":[{"type":"individual","id":"f52baf2f7ed93665","login":"drbagwell","name":"","avatar_url":"https://avatars-next.observableusercontent.com/44febcf38b1a0e9ddfc1c4d6c2df40de4227fc13f07d386ae87a7053ec79b220","tier":null,"bio":"","followed_by_you":false,"follows_you":false}],"members":[{"type":"individual","id":"f52baf2f7ed93665","login":"drbagwell","name":"","avatar_url":"https://avatars-next.observableusercontent.com/44febcf38b1a0e9ddfc1c4d6c2df40de4227fc13f07d386ae87a7053ec79b220","tier":null,"role":"editor"}],"comments":[],"custom_thumbnail":false,"trashed":false,"lapsed":null,"subscribed":null,"forks":0,"collection":null,"type":"notebook","body":{"titling":"auto","title":"Zoomable sunburst","cells":[{"id":0,"value":"

Zoomable sunburst

D3 › Gallery

\n\n# Zoomable sunburst\n\nThis variant of a [sunburst diagram](/@d3/sunburst/2?intent=fork) shows only two layers of the hierarchy at a time. Click a node to zoom in, or the center to zoom out. Compare to an [icicle](/@d3/zoomable-icicle).","pinned":false,"hidden":false,"mode":"md","author":"$undefined","summary":"$undefined","tool":"$undefined","providerMetadata":"$undefined","attachments":"$undefined","output":"","database":"$undefined"},{"id":7,"value":"$49","pinned":true,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined","tool":"$undefined","providerMetadata":"$undefined","attachments":"$undefined","output":"$undefined","database":"$undefined"},{"id":3,"value":"data = FileAttachment(\"flare-2.json\").json()","pinned":true,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined","tool":"$undefined","providerMetadata":"$undefined","attachments":"$undefined","output":"$undefined","database":"$undefined"}],"files":"$W4a","stdlib":"1"}} 24:null