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| license: mit |
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| <!DOCTYPE html> | |
| <style> | |
| svg { | |
| background-color: black; | |
| } | |
| .link line { | |
| stroke: #aaa; | |
| stroke-width: 2px; | |
| } | |
| .node circle { | |
| pointer-events: all; | |
| stroke: white; | |
| stroke-width: 3px; | |
| } | |
| .center { | |
| pointer-events: all; | |
| stroke: orange; | |
| stroke-width: 2px; | |
| fill: none; | |
| } | |
| </style> | |
| <svg width="960" height="500"></svg> | |
| <script src="https://d3js.org/d3.v4.min.js"></script> | |
| <script> | |
| var svg = d3.select("svg"), | |
| width = +svg.attr("width"), | |
| height = +svg.attr("height"); | |
| var radius = d3.scaleSqrt() | |
| .domain([0, 20000]) | |
| .range([0, 20]); | |
| var center = svg.append("g").append("circle") | |
| .attr("class", "center"); | |
| var link = svg.append("g") | |
| .attr("class", "link") | |
| .selectAll("line"); | |
| var node = svg.append("g") | |
| .attr("class", "node") | |
| .selectAll("circle"); | |
| var drag = d3.drag() | |
| .on("start", dragstarted) | |
| .on("drag", dragged) | |
| .on("end", dragended); | |
| var simulation = d3.forceSimulation() | |
| .force("link", d3.forceLink().distance(100)) | |
| .force("charge", d3.forceManyBody()) | |
| .force("center", d3.forceCenter(width / 2, height / 2)) | |
| .on("tick", ticked) | |
| .stop(); | |
| var nodes = [{id: 'Music'}, {id: 'data'}, {id: 'vizualization'}] | |
| var links = [{source: nodes[0], target: nodes[1]},{source: nodes[1], target: nodes[2]}, {source: nodes[2], target: nodes[0]}] | |
| link = link.data(links).enter().append("line"); | |
| node = node.data(nodes).enter().append("circle") | |
| .attr("r", function(d) { return 10; }) | |
| .call(drag); | |
| simulation.nodes(nodes); | |
| simulation.force("link").links(links); | |
| simulation.restart(); | |
| function ticked() { | |
| link | |
| .attr("x1", function(d) { return d.source.x; }) | |
| .attr("y1", function(d) { return d.source.y; }) | |
| .attr("x2", function(d) { return d.target.x; }) | |
| .attr("y2", function(d) { return d.target.y; }); | |
| node | |
| .attr("cx", function(d) { return d.x; }) | |
| .attr("cy", function(d) { return d.y; }); | |
| } | |
| function dragstarted(d) { | |
| if (!d3.event.active) simulation.alphaTarget(0.3).restart(); | |
| d.fx = d.x, d.fy = d.y; | |
| } | |
| function dragged(d) { | |
| d.fx = d3.event.x, d.fy = d3.event.y; | |
| } | |
| function dragended(d) { | |
| if (!d3.event.active) simulation.alphaTarget(0); | |
| d.fx = null, d.fy = null; | |
| } | |
| center | |
| .datum({x: width /2, y: height / 2}) | |
| .attr("cx", function(d) { return d.x; }) | |
| .attr("cy", function(d) { return d.y; }) | |
| .attr("r", 3) | |
| .call(d3.drag() | |
| .on("start", dragstartedCenter) | |
| .on("drag", draggedCenter) | |
| .on("end", dragendedCenter)); | |
| function dragstartedCenter(d) { | |
| d3.select(this).raise().classed("active", true); | |
| } | |
| function draggedCenter(d) { | |
| d3.select(this).attr("cx", d.x = d3.event.x).attr("cy", d.y = d3.event.y); | |
| simulation.force("center", d3.forceCenter(d3.event.x, d3.event.y)) | |
| simulation.alphaTarget(0.3).restart() | |
| } | |
| function dragendedCenter(d) { | |
| d3.select(this).classed("active", false); | |
| } | |
| </script> |
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