Styled after Series of Concentric Circles Emanating from Glowing Red Dot in The Onion.
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April 26, 2019 04:42
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Concentric Circles Emanating
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| license: gpl-3.0 |
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| <!DOCTYPE html> | |
| <meta charset="utf-8"> | |
| <style> | |
| body { | |
| background: #192887; | |
| } | |
| .graticule { | |
| fill: none; | |
| stroke: #fff; | |
| stroke-width: .5px; | |
| } | |
| .land { | |
| fill: #007421; | |
| } | |
| .dot { | |
| fill: #c7141a; | |
| } | |
| .ring { | |
| fill: none; | |
| stroke: #c7141a; | |
| } | |
| </style> | |
| <body> | |
| <script src="//d3js.org/d3.v3.min.js"></script> | |
| <script src="//d3js.org/topojson.v1.min.js"></script> | |
| <script> | |
| var width = 960, | |
| height = 500; | |
| var projection = d3.geo.mercator() | |
| .center([113, -3]) | |
| .scale(1275) | |
| .translate([width / 2, height / 2]) | |
| .clipExtent([[0, 0], [width, height]]) | |
| .precision(.1); | |
| var path = d3.geo.path() | |
| .projection(projection); | |
| var graticule = d3.geo.graticule() | |
| .step([5, 5]); | |
| var svg = d3.select("body").append("svg") | |
| .attr("width", width) | |
| .attr("height", height); | |
| svg.append("path") | |
| .datum(graticule) | |
| .attr("class", "graticule") | |
| .attr("d", path); | |
| svg.append("circle") | |
| .attr("class", "dot") | |
| .attr("transform", "translate(" + projection([100, -8]) + ")") | |
| .attr("r", 8); | |
| setInterval(function() { | |
| svg.append("circle") | |
| .attr("class", "ring") | |
| .attr("transform", "translate(" + projection([100, -8]) + ")") | |
| .attr("r", 6) | |
| .style("stroke-width", 3) | |
| .style("stroke", "red") | |
| .transition() | |
| .ease("linear") | |
| .duration(6000) | |
| .style("stroke-opacity", 1e-6) | |
| .style("stroke-width", 1) | |
| .style("stroke", "brown") | |
| .attr("r", 160) | |
| .remove(); | |
| }, 750); | |
| d3.json("/mbostock/raw/4090846/world-50m.json", function(error, world) { | |
| if (error) throw error; | |
| svg.insert("path", ".graticule") | |
| .datum(topojson.feature(world, world.objects.land)) | |
| .attr("class", "land") | |
| .attr("d", path); | |
| }); | |
| d3.select(self.frameElement).style("height", height + "px"); | |
| </script> |
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