Carbon copy of Mike Bostock'rainbow pack but on canvas! Thanks to d3-canvas-transition module.
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December 27, 2016 18:40
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Rainbow Pack on Canvas
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| license: bsd-3-clause |
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| <!DOCTYPE html> | |
| <html lang="en"> | |
| <head> | |
| <meta charset="utf-8"> | |
| <title>Concurrent Canvas Transitions</title> | |
| <script src="https://d3js.org/d3.v4.min.js"></script> | |
| <script src="https://giottojs.org/d3-canvas-transition/0.2.6/d3-canvas-transition.js"></script> | |
| </head> | |
| <body> | |
| <div id="paper"> | |
| <label> | |
| <input id='svg' name="type" type="radio" checked> | |
| <span>svg</span> | |
| </label> | |
| <label> | |
| <input id='canvas' name="type" type="radio"> | |
| <span>canvas</span> | |
| </label> | |
| </div> | |
| <div id="example" style="max-width: 960px"></div> | |
| <script> | |
| (function () { | |
| d3.select('#svg').on('click', function () { | |
| draw('svg'); | |
| }); | |
| d3.select('#canvas').on('click', function () { | |
| draw('canvas'); | |
| }); | |
| if (d3.resolution() > 1) { | |
| d3.select('#paper').append('label').html( | |
| "<input id='canvas-low' name='type' type='radio'><span>canvas low resolution</span>" | |
| ); | |
| d3.select('#canvas-low').on('click', function () { | |
| draw('canvas', 1); | |
| }); | |
| } | |
| draw('svg'); | |
| function draw(type, r) { | |
| var example = d3.select("#example"), | |
| width = d3.getSize(example.style('width')), | |
| height = Math.min(500, width), | |
| size = width; | |
| example.select('.paper').remove(); | |
| var paper = example | |
| .append(type) | |
| .classed('paper', true) | |
| .attr('width', width).attr('height', height).canvasResolution(r).canvas(true); | |
| var color = d3.scaleSequential(d3.interpolateRainbow) | |
| .domain([0, 2 * Math.PI]); | |
| var circles = d3.packSiblings(d3.range(2000) | |
| .map(d3.randomUniform(8, 26)) | |
| .map(function (r) { | |
| return {r: r}; | |
| })) | |
| .filter(function (d) { | |
| return -500 < d.x && d.x < 500 && -500 < d.y && d.y < 500; | |
| }); | |
| paper | |
| .append('rect') | |
| .style("fill", '#333') | |
| .attr("x", 0) | |
| .attr("y", 0) | |
| .attr("width", width) | |
| .attr("height", height); | |
| paper | |
| .append("g") | |
| .attr("transform", "translate(" + (width / 2) + "," + (height / 2) + ")") | |
| .selectAll("circle") | |
| .data(circles) | |
| .enter().append("circle") | |
| .style("fill", function (d) { | |
| return color(d.angle = Math.atan2(d.y, d.x)); | |
| }) | |
| .attr("cx", function (d) { | |
| return Math.cos(d.angle) * (size / Math.SQRT2 + 30); | |
| }) | |
| .attr("cy", function (d) { | |
| return Math.sin(d.angle) * (size / Math.SQRT2 + 30); | |
| }) | |
| .attr("r", function (d) { | |
| return d.r - 0.25; | |
| }) | |
| .transition() | |
| .ease(d3.easeCubicOut) | |
| .delay(function (d) { | |
| return Math.sqrt(d.x * d.x + d.y * d.y) * 10; | |
| }) | |
| .duration(1000) | |
| .attr("cx", function (d) { | |
| return d.x; | |
| }) | |
| .attr("cy", function (d) { | |
| return d.y; | |
| }); | |
| } | |
| }()); | |
| </script> | |
| </body> |
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