Created
April 20, 2013 20:03
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Simple Rotating Globe
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<!DOCTYPE html> | |
<meta charset="utf-8"> | |
<body> | |
<script src="http://d3js.org/d3.v3.min.js"></script> | |
<script src="http://d3js.org/topojson.v1.min.js"></script> | |
<script> | |
// The size of the map. | |
var width = 960; | |
var height = 500; | |
// The rotation speed as a simple factor. | |
var rotationFactor = 0.5; | |
// Two control variables for the rotation. | |
var isMouseDown = false; | |
var originalProjection = false; | |
var projection = d3.geo.orthographic() | |
.scale(250) | |
.translate([width / 2, height / 2]) | |
.clipAngle(90); | |
var path = d3.geo.path() | |
.projection(projection); | |
var svg = d3.select('body') | |
.append('svg') | |
.attr('width', width) | |
.attr('height', height); | |
svg.on('mousedown', function () { | |
isMouseDown = d3.mouse(this); | |
originalProjection = projection.rotate(); | |
}); | |
d3.select('body') | |
.on('mouseup', function () { | |
isMouseDown = false; | |
originalProjection = false; | |
}) | |
.on('mousemove', function () { | |
if (isMouseDown) { | |
var p = d3.mouse(this); | |
var x = originalProjection[0] + rotationFactor * (p[0] - isMouseDown[0]); | |
var y = originalProjection[1] - rotationFactor * (p[1] - isMouseDown[1]); | |
projection.rotate([x, y]); | |
svg.selectAll('path').attr('d', path); | |
} | |
}); | |
d3.json('/d/4090846/world-110m.json', function (error, world) { | |
svg.append('path') | |
.datum(topojson.feature(world, world.objects.land)) | |
.attr('class', 'land') | |
.attr('d', path); | |
}); | |
</script> |
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