Playing with clipAngle(x -> 0).
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August 28, 2017 06:42
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Vanishing Earth
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license: gpl-3.0 |
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<!DOCTYPE html> | |
<meta charset="utf-8"> | |
<body> | |
<script src="//d3js.org/d3.v4.min.js"></script> | |
<script src="//d3js.org/topojson.v1.min.js"></script> | |
<script> | |
var width = 960, | |
height = 500; | |
var radius = height / 2 - 20, | |
scale = radius, | |
velocity = .015; | |
var projection = d3.geoOrthographic() | |
.translate([width / 2, height / 2]) | |
.scale(scale) | |
.clipAngle(170); | |
var canvas = d3.select("body").append("canvas") | |
.attr("width", width) | |
.attr("height", height); | |
var context = canvas.node().getContext("2d"); | |
// retina display | |
var devicePixelRatio = window.devicePixelRatio || 1; | |
canvas.style('width', canvas.attr('width')+'px'); | |
canvas.style('height', canvas.attr('height')+'px'); | |
canvas.attr('width', canvas.attr('width') * devicePixelRatio); | |
canvas.attr('height', canvas.attr('height') * devicePixelRatio); | |
context.scale(devicePixelRatio,devicePixelRatio); | |
var path = d3.geoPath() | |
.projection(projection) | |
.context(context); | |
d3.json("https://gist.githubusercontent.com/mbostock/4090846/raw/d534aba169207548a8a3d670c9c2cc719ff05c47/world-110m.json", function(error, world) { | |
if (error) throw error; | |
var land = topojson.feature(world, world.objects.land); | |
d3.timer(function(elapsed) { | |
context.clearRect(0, 0, width, height); | |
projection.rotate([velocity * elapsed, 0]); | |
projection.clipAngle(Math.cos(0.05 * velocity * elapsed) * 45 + 45); | |
context.beginPath(); | |
path(land); | |
context.lineWidth = 1; | |
context.strokeStyle = 'black'; | |
context.stroke(); | |
context.fillStyle = '#eee'; | |
context.fill(); | |
context.beginPath(); | |
path({type: "Sphere"}); | |
context.lineWidth = 1.5; | |
context.strokeStyle = 'black'; | |
context.stroke(); | |
}); | |
}); | |
d3.select(self.frameElement).style("height", height + "px"); | |
</script> |
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