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rveciana/README.md

Last active August 29, 2015 13:59
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Hayan typhoon gradient colored track
Raw
README.md
Raw
index.html
<!DOCTYPE html>
<meta charset="utf-8">
<style>
.graticule {
fill: none;
stroke: #777;
stroke-opacity: .5;
stroke-width: .5px;
}
.land {
fill: #999;
}
.boundary {
fill: none;
stroke: #fff;
stroke-width: .5px;
}
svg .path {
fill: none;
stroke-opacity: .8;
stroke-dasharray: 3,2;
stroke: #f44;
}
</style>
<body>
<script src="http://d3js.org/d3.v3.min.js"></script>
<script src="http://d3js.org/topojson.v1.min.js"></script>
<script>
var width = 600,
height = 500;
var trackWidth = 8;
var color = d3.interpolateLab("#008000", "#c83a22");
var projection = d3.geo.mercator()
.scale(5*(width + 1) / 2 / Math.PI)
.translate([width / 2, height / 2])
.rotate([-125, -15, 0])
.precision(.1);
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(graticule)
.attr("class", "graticule")
.attr("d", path);
d3.json("track.json", function(error, track) {
d3.json("/mbostock/raw/4090846/world-50m.json", function(error, world) {
var filter = svg.append("defs")
.append("filter")
.attr("id", "drop-shadow")
.attr("height", "130%");
filter.append("feGaussianBlur")
.attr("in", "SourceAlpha")
.attr("stdDeviation", 5)
.attr("result", "blur");
filter.append("feOffset")
.attr("in", "blur")
.attr("dx", 5)
.attr("dy", 5)
.attr("result", "offsetBlur");
var feMerge = filter.append("feMerge");
feMerge.append("feMergeNode")
.attr("in", "offsetBlur")
feMerge.append("feMergeNode")
.attr("in", "SourceGraphic");
svg.insert("path", ".land")
.datum(topojson.feature(world, world.objects.land))
.attr("class", "land")
.attr("d", path)
.style("filter", "url(#drop-shadow)");
svg.insert("path", ".boundary")
.datum(topojson.mesh(world, world.objects.countries, function(a, b) { return a !== b; }))
.attr("class", "boundary")
.attr("d", path);
var line = d3.svg.line()
.interpolate("cardinal")
.x(function(d) { return projection([d.lon, d.lat])[0]; })
.y(function(d) { return projection([d.lon, d.lat])[1]; });
svg.selectAll("path")
.data(quad(sample(line(track), 8)))
.enter().append("path")
.style("fill", function(d) { return color(d.t); })
.style("stroke", function(d) { return color(d.t); })
.attr("d", function(d) { return lineJoin(d[0], d[1], d[2], d[3], trackWidth); });
});
});
// Sample the SVG path string "d" uniformly with the specified precision.
function sample(d, precision) {
var path = document.createElementNS(d3.ns.prefix.svg, "path");
path.setAttribute("d", d);
var n = path.getTotalLength(), t = [0], i = 0, dt = precision;
while ((i += dt) < n) t.push(i);
t.push(n);
return t.map(function(t) {
var p = path.getPointAtLength(t), a = [p.x, p.y];
a.t = t / n;
return a;
});
}
// Compute quads of adjacent points [p0, p1, p2, p3].
function quad(points) {
return d3.range(points.length - 1).map(function(i) {
var a = [points[i - 1], points[i], points[i + 1], points[i + 2]];
a.t = (points[i].t + points[i + 1].t) / 2;
return a;
});
}
// Compute stroke outline for segment p12.
function lineJoin(p0, p1, p2, p3, width) {
var u12 = perp(p1, p2),
r = width / 2,
a = [p1[0] + u12[0] * r, p1[1] + u12[1] * r],
b = [p2[0] + u12[0] * r, p2[1] + u12[1] * r],
c = [p2[0] - u12[0] * r, p2[1] - u12[1] * r],
d = [p1[0] - u12[0] * r, p1[1] - u12[1] * r];
if (p0) { // clip ad and dc using average of u01 and u12
var u01 = perp(p0, p1), e = [p1[0] + u01[0] + u12[0], p1[1] + u01[1] + u12[1]];
a = lineIntersect(p1, e, a, b);
d = lineIntersect(p1, e, d, c);
}
if (p3) { // clip ab and dc using average of u12 and u23
var u23 = perp(p2, p3), e = [p2[0] + u23[0] + u12[0], p2[1] + u23[1] + u12[1]];
b = lineIntersect(p2, e, a, b);
c = lineIntersect(p2, e, d, c);
}
return "M" + a + "L" + b + " " + c + " " + d + "Z";
}
// Compute intersection of two infinite lines ab and cd.
function lineIntersect(a, b, c, d) {
var x1 = c[0], x3 = a[0], x21 = d[0] - x1, x43 = b[0] - x3,
y1 = c[1], y3 = a[1], y21 = d[1] - y1, y43 = b[1] - y3,
ua = (x43 * (y1 - y3) - y43 * (x1 - x3)) / (y43 * x21 - x43 * y21);
return [x1 + ua * x21, y1 + ua * y21];
}
// Compute unit vector perpendicular to p01.
function perp(p0, p1) {
var u01x = p0[1] - p1[1], u01y = p1[0] - p0[0],
u01d = Math.sqrt(u01x * u01x + u01y * u01y);
return [u01x / u01d, u01y / u01d];
}
</script>
Raw
track.json
[{"day":3, "hour":18, "lat":6.1, "lon":153.3, "class": 2},{"day":3, "hour":21, "lat":6.1, "lon":152.8, "class": 2},{"day":4, "hour":0, "lat":6.1, "lon":152.2, "class": 3},{"day":4, "hour":3, "lat":6.2, "lon":151.2, "class": 3},{"day":4, "hour":6, "lat":6.2, "lon":150.4, "class": 3},{"day":4, "hour":9, "lat":6.2, "lon":149.5, "class": 3},{"day":4, "hour":12, "lat":6.3, "lon":148.6, "class": 3},{"day":4, "hour":15, "lat":6.3, "lon":148.4, "class": 3},{"day":4, "hour":18, "lat":6.5, "lon":147.6, "class": 3},{"day":4, "hour":21, "lat":6.5, "lon":147.0, "class": 3},{"day":5, "hour":0, "lat":6.5, "lon":145.9, "class": 4},{"day":5, "hour":3, "lat":6.5, "lon":145.2, "class": 4},{"day":5, "hour":6, "lat":6.5, "lon":144.6, "class": 4},{"day":5, "hour":9, "lat":6.5, "lon":144.0, "class": 4},{"day":5, "hour":12, "lat":6.9, "lon":143.1, "class": 4},{"day":5, "hour":15, "lat":7.0, "lon":142.1, "class": 4},{"day":5, "hour":18, "lat":7.1, "lon":141.3, "class": 5},{"day":5, "hour":21, "lat":7.3, "lon":140.5, "class": 5},{"day":6, "hour":0, "lat":7.3, "lon":139.7, "class": 5},{"day":6, "hour":3, "lat":7.5, "lon":138.9, "class": 5},{"day":6, "hour":6, "lat":7.6, "lon":138.0, "class": 5},{"day":6, "hour":9, "lat":7.7, "lon":137.2, "class": 5},{"day":6, "hour":12, "lat":7.9, "lon":136.2, "class": 5},{"day":6, "hour":15, "lat":8.1, "lon":135.3, "class": 5},{"day":6, "hour":18, "lat":8.2, "lon":134.4, "class": 5},{"day":6, "hour":21, "lat":8.4, "lon":133.6, "class": 5},{"day":7, "hour":0, "lat":8.7, "lon":132.8, "class": 5},{"day":7, "hour":3, "lat":9.0, "lon":131.9, "class": 5},{"day":7, "hour":6, "lat":9.3, "lon":131.1, "class": 5},{"day":7, "hour":9, "lat":9.8, "lon":130.2, "class": 5},{"day":7, "hour":12, "lat":10.2, "lon":129.1, "class": 5},{"day":7, "hour":15, "lat":10.4, "lon":128.0, "class": 5},{"day":7, "hour":18, "lat":10.6, "lon":126.9, "class": 5},{"day":7, "hour":21, "lat":10.8, "lon":125.9, "class": 5},{"day":8, "hour":0, "lat":11.0, "lon":124.8, "class": 5},{"day":8, "hour":3, "lat":11.2, "lon":123.7, "class": 5},{"day":8, "hour":6, "lat":11.4, "lon":122.6, "class": 5},{"day":8, "hour":9, "lat":11.5, "lon":121.6, "class": 5},{"day":8, "hour":12, "lat":11.8, "lon":120.7, "class": 5},{"day":8, "hour":15, "lat":12.3, "lon":119.4, "class": 5},{"day":8, "hour":18, "lat":12.4, "lon":118.2, "class": 5},{"day":8, "hour":21, "lat":12.5, "lon":117.3, "class": 5},{"day":9, "hour":0, "lat":12.3, "lon":116.6, "class": 5},{"day":9, "hour":3, "lat":12.9, "lon":115.6, "class": 5},{"day":9, "hour":9, "lat":13.9, "lon":113.9, "class": 5},{"day":9, "hour":12, "lat":14.4, "lon":113.1, "class": 5},{"day":9, "hour":15, "lat":15.0, "lon":112.2, "class": 5},{"day":9, "hour":18, "lat":15.4, "lon":111.4, "class": 5},{"day":9, "hour":21, "lat":15.9, "lon":111.1, "class": 5},{"day":10, "hour":0, "lat":16.5, "lon":110.3, "class": 5},{"day":10, "hour":3, "lat":17.0, "lon":109.7, "class": 5},{"day":10, "hour":6, "lat":17.8, "lon":109.0, "class": 5},{"day":10, "hour":9, "lat":18.5, "lon":108.4, "class": 5},{"day":10, "hour":12, "lat":19.4, "lon":108.1, "class": 5},{"day":10, "hour":15, "lat":19.8, "lon":107.9, "class": 5},{"day":10, "hour":18, "lat":20.3, "lon":107.5, "class": 4},{"day":10, "hour":21, "lat":20.8, "lon":107.1, "class": 4},{"day":11, "hour":0, "lat":21.3, "lon":107.2, "class": 4},{"day":11, "hour":3, "lat":22.0, "lon":107.2, "class": 4},{"day":11, "hour":6, "lat":22.3, "lon":107.4, "class": 3},{"day":11, "hour":9, "lat":22.6, "lon":107.6, "class": 3},{"day":11, "hour":12, "lat":23.0, "lon":107.0, "class": 2}]
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