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December 14, 2020 21:20
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An animated radar chart in D3.js inspired by the Westworld series
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| <!DOCTYPE html> | |
| <html> | |
| <head></head> | |
| <link rel="stylesheet" href="style.css"> | |
| <script src="https://d3js.org/d3.v4.min.js"></script> | |
| <body> | |
| <div id="chart"></div> | |
| <script> | |
| var chart = d3.select('#chart'); | |
| var width = 960, height = 500; | |
| var centerCoords = [width/2, height/2]; | |
| var RADIAN_OFFSET = Math.PI/2; | |
| var padding = 60; | |
| var radius = d3.min([width - padding, height - padding])/2; | |
| var svg = chart.selectAll("svg") | |
| .data([{}]).enter() | |
| .append("svg") | |
| .attr("height", height) | |
| .attr("width", width); | |
| var data = [ | |
| {attribute: 'Bulk Apperception', value: 14}, | |
| {attribute: 'Candor', value: 19}, | |
| {attribute: 'Vivacity', value: 17}, | |
| {attribute: 'Coordination', value: 10}, | |
| {attribute: 'Meekness', value: 2}, | |
| {attribute: 'Humility', value: 3}, | |
| {attribute: 'Cruelty', value: 1}, | |
| {attribute: 'Self-Preservation', value: 10}, | |
| {attribute: 'Patience', value: 3}, | |
| {attribute: 'Decisiveness', value: 14}, | |
| {attribute: 'Imagination', value: 13}, | |
| {attribute: 'Curiosity', value: 8}, | |
| {attribute: 'Aggression', value: 5}, | |
| {attribute: 'Loyalty', value: 16}, | |
| {attribute: 'Empathy', value: 9}, | |
| {attribute: 'Tenacity', value: 17}, | |
| {attribute: 'Courage', value: 15}, | |
| {attribute: 'Sensuality', value: 18}, | |
| {attribute: 'Charm', value: 18}, | |
| {attribute: 'Humor', value: 9} | |
| ] | |
| var domain = [0,20] | |
| var angle = d3.scaleLinear() | |
| .domain([0, data.length]) | |
| .range([0 - RADIAN_OFFSET, 2 * Math.PI - RADIAN_OFFSET]); | |
| var measureScale = d3.scaleLinear() | |
| .domain(domain) | |
| .range([30, radius]) | |
| var X = function(i, r, offset) { | |
| if (offset === undefined) offset = 0; | |
| if (r === undefined) r = radius; | |
| return Math.cos(angle(i)) * (r + offset); | |
| } | |
| var Y = function(i, r, offset) { | |
| if (offset === undefined) offset = 0; | |
| if (r === undefined) r = radius; | |
| return Math.sin(angle(i)) * (r + offset); | |
| } | |
| var labelAnchor = function(d, i) { | |
| var topAngle = 0 - Math.PI/2; | |
| var bottomAngle = 0 + Math.PI/2; | |
| var the_angle = angle(i); | |
| var anchor = ""; | |
| if (the_angle == topAngle || the_angle == bottomAngle) | |
| anchor = "middle" | |
| else if(the_angle > topAngle && the_angle < bottomAngle) | |
| anchor = "start" | |
| else | |
| anchor = "end" | |
| return anchor; | |
| } | |
| var radar = svg.append('g') | |
| .attr('transform',"translate(" + centerCoords[0] + "," + centerCoords[1] + ")"); | |
| radar.selectAll('circle.ring') | |
| .data(d3.range(domain[0],domain[1])).enter() | |
| .append('circle') | |
| .classed('ring',true) | |
| .attr('cx',0) | |
| .attr('cy',0) | |
| .attr('r', function(d,i) { | |
| return measureScale(i + 1); | |
| }) | |
| radar.selectAll('line.axis') | |
| .data(data).enter() | |
| .append('line') | |
| .classed('axis',true) | |
| .attr('x0',0) | |
| .attr('y0',0) | |
| .attr('x1',function(d,i) { return X(i)}) | |
| .attr('y1',function(d,i) { return Y(i)}) | |
| radar.selectAll('circle.axis_circle') | |
| .data(data).enter() | |
| .append('circle') | |
| .classed('axis_circle',true) | |
| .attr('cx',function(d,i) { return X(i)}) | |
| .attr('cy',function(d,i) { return Y(i)}) | |
| .attr('r',7) | |
| var areas = radar.selectAll('polygon.area') | |
| .data([data]).enter() | |
| areas.append('polygon') | |
| .classed('area',true) | |
| .attr('points', function(d) { | |
| return d.map(function() { | |
| return [0,0] | |
| }).join(' ') | |
| }) | |
| .merge(areas) | |
| .transition() | |
| .duration(2500) | |
| .attr('points', function(d) { | |
| return d.map(function(d,i) { | |
| var rad = measureScale(d.value); | |
| return [X(i, rad), Y(i, rad)]; | |
| }).join(' '); | |
| }) | |
| var points = radar.selectAll('circle.point') | |
| .data(data).enter() | |
| points.append('circle') | |
| .classed('point',true) | |
| .attr('r', 7) | |
| .attr('cx',0) | |
| .attr('cy',0) | |
| .merge(points) | |
| .transition() | |
| .duration(2500) | |
| .attr('cx',function(d,i) { return X(i,measureScale(d.value))}) | |
| .attr('cy',function(d,i) { return Y(i,measureScale(d.value))}) | |
| radar.append('circle') | |
| .classed('center',true) | |
| .attr('cx',0) | |
| .attr('cy',0) | |
| .attr('r',30) | |
| radar.selectAll('text.label') | |
| .data(data).enter() | |
| .append('text') | |
| .classed('label',true) | |
| .attr('x', function(d,i) { return X(i, radius, 20)}) | |
| .attr('y', function(d,i) { return Y(i, radius, 20)}) | |
| .style("text-anchor", labelAnchor) | |
| .text(function(d) { | |
| return d.attribute.toUpperCase() + " [" + d.value +"]"; | |
| }) | |
| </script> | |
| </body> |
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| body { | |
| background-color: #222; | |
| } | |
| circle, line, polygon { | |
| stroke: #E3E3E3; | |
| stroke-width: 3px; | |
| fill:none; | |
| } | |
| text { | |
| font-family: 'Helvetica'; | |
| font-size:12px; | |
| font-weight: bold; | |
| stroke: none; | |
| fill:#BFEFFF; | |
| alignment-baseline: middle; | |
| } | |
| circle.ring, | |
| polygon.ring { | |
| stroke-width: 1px; | |
| opacity: .5; | |
| fill:none; | |
| } | |
| circle.axis_circle, | |
| circle.point { | |
| stroke-width: 1px; | |
| stroke: #BFEFFF; | |
| fill:none; | |
| } | |
| circle.point { | |
| fill:#5890A4; | |
| } | |
| circle.center { | |
| stroke-width: 2px; | |
| stroke: #BFEFFF; | |
| fill: #145B60; | |
| } | |
| polygon.area { | |
| stroke: #BFEFFF; | |
| stroke-width: 2px; | |
| fill:none; | |
| fill:#4493AA; | |
| fill-opacity:.4; | |
| } | |
| line.axis { | |
| stroke-width: 1px; | |
| opacity: .5; | |
| } |
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