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btipling/README.md

Forked from jasondavies/README.md
Created December 24, 2012 06:46
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README.md
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index.html
<!DOCTYPE html>
<meta charset="utf-8">
<style>
body {
height: 500px;
position: relative;
width: 960px;
}
#projection-menu {
position: absolute;
right: 10px;
top: 10px;
}
path {
fill: none;
stroke: #000;
stroke-width: 1px;
}
.background {
fill: none;
display: none;
}
.foreground {
fill: none;
stroke: #333;
stroke-width: 1.5px;
display: none;
}
.graticule {
fill: none;
stroke: #333;
stroke-width: .5px;
}
.graticule:nth-child(2n) {
stroke-dasharray: 2,2;
}
.land {
fill: #d7c7ad;
stroke: #766951;
}
.boundary {
fill: none;
stroke: #a5967e;
}
</style>
<select id="projection-menu"></select>
<script src="http://d3js.org/d3.v3.min.js"></script>
<script src="https://raw.github.com/d3/d3-plugins/master/geo/projection/projection.js"></script>
<script>
var width = 960,
height = 500;
var options = [
{name: "Aitoff", projection: d3.geo.aitoff()},
{name: "Albers", projection: d3.geo.albers().scale(145).parallels([20, 50]).center([0, 0]).translate([width * .500, height * .750])},
{name: "Bonne", projection: d3.geo.bonne().scale(120).translate([width * .500, height * .425])},
{name: "Collignon", projection: d3.geo.collignon().scale(93)},
{name: "Eckert I", projection: d3.geo.eckert1().scale(165)},
{name: "Eckert II", projection: d3.geo.eckert2().scale(165)},
{name: "Eckert III", projection: d3.geo.eckert3().scale(180)},
{name: "Eckert IV", projection: d3.geo.eckert4().scale(180)},
{name: "Eckert V", projection: d3.geo.eckert5().scale(170)},
{name: "Eckert VI", projection: d3.geo.eckert6().scale(170)},
{name: "Equirectangular (Plate Carrée)", projection: d3.geo.equirectangular()},
{name: "Hammer", projection: d3.geo.hammer().scale(165)},
{name: "Goode Homolosine", projection: d3.geo.homolosine()},
{name: "Kavrayskiy VII", projection: d3.geo.kavrayskiy7()},
{name: "Lambert cylindrical equal-area", projection: d3.geo.cylindricalEqualArea()},
{name: "Larrivée", projection: d3.geo.larrivee().scale(95)},
{name: "Mercator", projection: d3.geo.mercator().scale(490)},
{name: "Miller", projection: d3.geo.miller().scale(100)},
{name: "Mollweide", projection: d3.geo.mollweide().scale(165)},
{name: "Nell–Hammer", projection: d3.geo.nellHammer()},
{name: "Polyconic", projection: d3.geo.polyconic().scale(100)},
{name: "Robinson", projection: d3.geo.robinson()},
{name: "Sinusoidal", projection: d3.geo.sinusoidal()},
{name: "van der Grinten", projection: d3.geo.vanDerGrinten().scale(75)},
{name: "Wagner VI", projection: d3.geo.wagner6()},
{name: "Winkel Tripel", projection: d3.geo.winkel3()}
];
var initial = [-71, 42, 0],
rotate = initial.slice(),
transitioning = false,
velocity = [.010, -.002],
t0 = Date.now();
var interval = setInterval(loop, 5000),
i = 0,
n = options.length - 1;
var projection = options[i].projection
.translate([width / 2 - .5, height / 2 - .5]);
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)
.call(d3.behavior.drag()
.origin(function() { return {x: rotate[0], y: -rotate[1]}; })
.on("dragstart", function() { transitioning = true; })
.on("drag", function(d) {
rotate[0] = d3.event.x;
rotate[1] = -d3.event.y;
projection.rotate(rotate);
svg.selectAll(".geometry, .graticule").attr("d", path);
})
.on("dragend", function() {
transitioning = false;
t0 = Date.now();
initial = rotate.slice();
}));
svg.append("path")
.datum(graticule.outline)
.attr("class", "background")
.attr("d", path);
svg.selectAll(".graticule")
.data(graticule.lines)
.enter().append("path")
.attr("class", "graticule")
.attr("d", path);
svg.append("path")
.datum(graticule.outline)
.attr("class", "foreground")
.attr("d", path);
var menu = d3.select("#projection-menu")
.on("change", change);
menu.selectAll("option")
.data(options)
.enter().append("option")
.text(function(d) { return d.name; });
function loop() {
if (transitioning) return;
var j = Math.floor(Math.random() * n);
menu.property("selectedIndex", i = j + (j >= i));
update(options[i]);
}
function change() {
clearInterval(interval);
update(options[this.selectedIndex]);
}
function update(option) {
projection.precision(Infinity);
svg.selectAll(".geometry, .graticule").attr("d", path);
path.projection(projection = option.projection);
projection.rotate(rotate).precision(Infinity);
transitioning = true;
initial = rotate.slice();
svg.selectAll(".geometry, .graticule").transition()
.duration(750)
.attr("d", path)
.each("end", function() {
transitioning = false;
t0 = Date.now();
});
d3.timer.flush();
projection.rotate([0, 0, 0]);
svg.selectAll(".background, .foreground").transition()
.duration(750)
.attr("d", path);
d3.timer.flush();
projection.precision(10);
}
d3.timer(function() {
if (transitioning) return;
var t = Date.now() - t0;
rotate[0] = initial[0] + velocity[0] * t;
rotate[1] = initial[1] + velocity[1] * t;
projection.rotate(rotate);
svg.selectAll(".geometry, .graticule").attr("d", path);
});
d3.json("readme.json", function(err, geometry) {
var feature = svg.insert("path", ".foreground,.graticule")
.attr("class", "geometry")
.datum(geometry);
});
</script>
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