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Forked from johan/dnd.js
Created Nov 25, 2011
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Animated Draggable Spinny Globe
<!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>
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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