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Last active August 28, 2017 06:42
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Vanishing Earth
license: gpl-3.0

Playing with clipAngle(x -> 0).

<!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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