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Animated Draggable Spinny Globe
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<!DOCTYPE html> | |
<html> | |
<head> | |
<meta http-equiv="Content-Type" content="text/html;charset=utf-8"/> | |
<title>d3.js Spinny Globe from Mike Bostock's SVG Open 2011 keynote</title> | |
<script src="http://mbostock.github.com/d3/d3.js"></script> | |
<script src="http://mbostock.github.com/d3/d3.geo.js"></script> | |
<link type="text/css" rel="stylesheet" href="http://mbostock.github.com/d3/talk/20111018/style.css"/> | |
<link type="text/css" rel="stylesheet" href="http://mbostock.github.com/d3/talk/20111018/colorbrewer/colorbrewer.css"/> | |
<style type="text/css"> | |
svg { | |
width: 800px; | |
height: 800px; | |
pointer-events: all; | |
} | |
circle { | |
fill: #dbe4f0; | |
} | |
path { | |
fill: #aaa; | |
stroke: #fff; | |
} | |
#header { | |
top: 7px; | |
left: 685px; | |
text-align: right; | |
width: auto; | |
} | |
#header div { | |
font-size: 12px; | |
} | |
.tip { color: #999; } | |
</style> | |
</head> | |
<body> | |
<div id="body"> | |
<div id="header"> | |
d3.geo.azimuthal | |
<div><label for="proj">Projection: </label><select id="proj"> | |
<option value="equalarea">equalarea</option> | |
<option value="equidistant">equidistant</option> | |
<option value="gnomonic">gnomonic</option> | |
<option value="orthographic" selected>orthographic</option> | |
<option value="stereographic">stereographic</option> | |
</select></div> | |
<div class="tip">drag to rotate the origin</div> | |
<div><label for="animate">animate:</label> | |
<input id="animate" type="checkbox" checked> | |
</div> | |
</div> | |
</div> | |
<script src="vis.js"></script> | |
</body> | |
</html> |
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var feature // eventually: all svg paths (countries) of the world | |
, toggle; // animation on/off control | |
var projection = d3.geo.azimuthal() | |
.scale(380) | |
.origin([-71.03,42.37]) | |
.mode("orthographic") | |
.translate([400, 400]); | |
var circle = d3.geo.greatCircle() | |
.origin(projection.origin()); | |
// TODO fix d3.geo.azimuthal to be consistent with scale | |
var scale = | |
{ orthographic: 380 | |
, stereographic: 380 | |
, gnomonic: 380 | |
, equidistant: 380 / Math.PI * 2 | |
, equalarea: 380 / Math.SQRT2 | |
}; | |
var path = d3.geo.path() | |
.projection(projection); | |
var svg = d3.select("#body").append("svg:svg") | |
.attr("width", 800) | |
.attr("height", 800) | |
.on("mousedown", mousedown); | |
if (frameElement) frameElement.style.height = '800px'; | |
d3.json("world-countries.json", function(collection) { | |
feature = svg.selectAll("path") | |
.data(collection.features) | |
.enter().append("svg:path") | |
.attr("d", clip); | |
feature.append("svg:title") | |
.text(function(d) { return d.properties.name; }); | |
startAnimation(); | |
d3.select('#animate').on('click', function () { | |
if (done) startAnimation(); else stopAnimation(); | |
}); | |
}); | |
function stopAnimation() { | |
done = true; | |
d3.select('#animate').node().checked = false; | |
} | |
function startAnimation() { | |
done = false; | |
d3.timer(function() { | |
var origin = projection.origin(); | |
origin = [origin[0] + .18, origin[1] + .06]; | |
projection.origin(origin); | |
circle.origin(origin); | |
refresh(); | |
return done; | |
}); | |
} | |
function animationState() { | |
return 'animation: '+ (done ? 'off' : 'on'); | |
} | |
d3.select(window) | |
.on("mousemove", mousemove) | |
.on("mouseup", mouseup); | |
d3.select("select").on("change", function() { | |
stopAnimation(); | |
projection.mode(this.value).scale(scale[this.value]); | |
refresh(750); | |
}); | |
var m0 | |
, o0 | |
, done | |
; | |
function mousedown() { | |
stopAnimation(); | |
m0 = [d3.event.pageX, d3.event.pageY]; | |
o0 = projection.origin(); | |
d3.event.preventDefault(); | |
} | |
function mousemove() { | |
if (m0) { | |
var m1 = [d3.event.pageX, d3.event.pageY] | |
, o1 = [o0[0] + (m0[0] - m1[0]) / 8, o0[1] + (m1[1] - m0[1]) / 8]; | |
projection.origin(o1); | |
circle.origin(o1); | |
refresh(); | |
} | |
} | |
function mouseup() { | |
if (m0) { | |
mousemove(); | |
m0 = null; | |
} | |
} | |
function refresh(duration) { | |
(duration ? feature.transition().duration(duration) : feature).attr("d", clip); | |
} | |
function clip(d) { | |
return path(circle.clip(d)); | |
} | |
function reframe(css) { | |
for (var name in css) | |
frameElement.style[name] = css[name] + 'px'; | |
} |
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