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Last active February 9, 2016 02:04
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Rotating Orthographic
license: gpl-3.0
<!DOCTYPE html>
<meta charset="utf-8">
<style>
path {
fill: none;
stroke-linejoin: round;
}
.sphere,
.graticule {
stroke: #aaa;
}
.equator {
stroke: red;
stroke-width: 2px;
}
</style>
<body>
<script src="//d3js.org/d3.v3.min.js"></script>
<script>
var width = 960,
height = 500,
rotate = [10, -10],
velocity = [.003, -.001],
time = Date.now();
var projection = d3.geo.orthographic()
.scale(240)
.translate([width / 2, height / 2])
.clipAngle(90 + 1e-6)
.precision(.3);
var path = d3.geo.path()
.projection(projection);
var graticule = d3.geo.graticule();
var svg = d3.select("body").append("svg")
.attr("width", width)
.attr("height", height);
svg.append("path")
.datum({type: "Sphere"})
.attr("class", "sphere")
.attr("d", path);
svg.append("path")
.datum(graticule)
.attr("class", "graticule")
.attr("d", path);
svg.append("path")
.datum({type: "LineString", coordinates: [[-180, 0], [-90, 0], [0, 0], [90, 0], [180, 0]]})
.attr("class", "equator")
.attr("d", path);
var feature = svg.selectAll("path");
d3.timer(function() {
var dt = Date.now() - time;
projection.rotate([rotate[0] + velocity[0] * dt, rotate[1] + velocity[1] * dt]);
feature.attr("d", path);
});
</script>
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