forked from JulienAssouline's block: World tour d3 v4
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February 2, 2018 20:39
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World tour d3 v4
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license: mit |
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<!DOCTYPE html> | |
<meta charset="utf-8"> | |
<style> | |
.country { | |
fill: #b8b8b8; | |
stroke: #fff; | |
stroke-width: .5px; | |
stroke-linejoin: round; | |
} | |
.graticule { | |
fill: none; | |
stroke: #000; | |
stroke-opacity: .3; | |
stroke-width: .5px; | |
} | |
.graticule-outline { | |
fill: none; | |
stroke: #333; | |
stroke-width: 1.5px; | |
} | |
text { | |
font-family: "Helvetica Neue", Helvetica, Arial, sans-serif; | |
font-size: 18px; | |
font-weight: bold; | |
text-anchor: middle; | |
z-index: 100; | |
} | |
</style> | |
<body> | |
<script src="https://d3js.org/d3.v4.min.js"></script> | |
<script src="http://d3js.org/topojson.v0.min.js"></script> | |
<script> | |
var width = 960, | |
height = 500; | |
var projection = d3.geoOrthographic() | |
.scale(248) | |
.clipAngle(90); | |
var path = d3.geoPath(projection); | |
var graticule = d3.geoGraticule() | |
.extent([[-180, -90], [180 - .1, 90 - .1]]); | |
var svg = d3.select("body").append("svg") | |
.attr("width", width) | |
.attr("height", height); | |
var line = svg.append("path") | |
.datum(graticule) | |
.attr("class", "graticule") | |
.attr("d", path); | |
svg.append("circle") | |
.attr("class", "graticule-outline") | |
.attr("cx", width / 2) | |
.attr("cy", height / 2) | |
.attr("r", projection.scale()); | |
d3.json("readme-world-110m.json", function(error, world) { | |
var countries = topojson.object(world, world.objects.countries).geometries, | |
i = -1, | |
n = countries.length; | |
var country = svg.selectAll(".country") | |
.data(countries) | |
.enter().insert("path", ".graticule") | |
.attr("class", "country") | |
.attr("d", path); | |
var title = svg.append("text") | |
.attr("x", width / 2) | |
.attr("y", height * 3 / 5); | |
step(); | |
function step() { | |
if (++i >= n) i = 0; | |
title.text(countries[i].id); | |
country.transition() | |
.style("fill", function(d, j) { return j === i ? "red" : "#b8b8b8"; }); | |
d3.transition() | |
.delay(250) | |
.duration(1250) | |
.tween("rotate", function() { | |
var point = d3.geoCentroid(countries[i]), | |
rotate = d3.interpolate(projection.rotate(), [-point[0], -point[1]]); | |
return function(t) { | |
projection.rotate(rotate(t)); | |
line.attr("d", path); | |
country.attr("d", path); | |
}; | |
}) | |
.transition() | |
.on("end", step); | |
} | |
}); | |
</script> |
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