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d3.layout.cloud.js
// Word cloud layout by Jason Davies, http://www.jasondavies.com/word-cloud/
// Algorithm due to Jonathan Feinberg, http://static.mrfeinberg.com/bv_ch03.pdf
(function(exports) {
function cloud() {
var size = [256, 256],
text = cloudText,
font = cloudFont,
fontSize = cloudFontSize,
fontStyle = cloudFontNormal,
fontWeight = cloudFontNormal,
rotate = cloudRotate,
padding = cloudPadding,
spiral = archimedeanSpiral,
words = [],
timeInterval = Infinity,
event = d3.dispatch("word", "end"),
timer = null,
cloud = {};
cloud.start = function() {
var board = zeroArray((size[0] >> 5) * size[1]),
bounds = null,
n = words.length,
i = -1,
tags = [],
data = words.map(function(d, i) {
d.text = text.call(this, d, i);
d.font = font.call(this, d, i);
d.style = fontStyle.call(this, d, i);
d.weight = fontWeight.call(this, d, i);
d.rotate = rotate.call(this, d, i);
d.size = ~~fontSize.call(this, d, i);
d.padding = cloudPadding.call(this, d, i);
return d;
}).sort(function(a, b) { return b.size - a.size; });
if (timer) clearInterval(timer);
timer = setInterval(step, 0);
step();
return cloud;
function step() {
var start = +new Date,
d;
while (+new Date - start < timeInterval && ++i < n && timer) {
d = data[i];
d.x = (size[0] * (Math.random() + .5)) >> 1;
d.y = (size[1] * (Math.random() + .5)) >> 1;
cloudSprite(d, data, i);
if (place(board, d, bounds)) {
tags.push(d);
event.word(d);
if (bounds) cloudBounds(bounds, d);
else bounds = [{x: d.x + d.x0, y: d.y + d.y0}, {x: d.x + d.x1, y: d.y + d.y1}];
// Temporary hack
d.x -= size[0] >> 1;
d.y -= size[1] >> 1;
}
}
if (i >= n) {
cloud.stop();
event.end(tags, bounds);
}
}
}
cloud.stop = function() {
if (timer) {
clearInterval(timer);
timer = null;
}
return cloud;
};
cloud.timeInterval = function(x) {
if (!arguments.length) return timeInterval;
timeInterval = x == null ? Infinity : x;
return cloud;
};
function place(board, tag, bounds) {
var perimeter = [{x: 0, y: 0}, {x: size[0], y: size[1]}],
startX = tag.x,
startY = tag.y,
maxDelta = Math.sqrt(size[0] * size[0] + size[1] * size[1]),
s = spiral(size),
dt = Math.random() < .5 ? 1 : -1,
t = -dt,
dxdy,
dx,
dy;
while (dxdy = s(t += dt)) {
dx = ~~dxdy[0];
dy = ~~dxdy[1];
if (Math.min(dx, dy) > maxDelta) break;
tag.x = startX + dx;
tag.y = startY + dy;
if (tag.x + tag.x0 < 0 || tag.y + tag.y0 < 0 ||
tag.x + tag.x1 > size[0] || tag.y + tag.y1 > size[1]) continue;
// TODO only check for collisions within current bounds.
if (!bounds || !cloudCollide(tag, board, size[0])) {
if (!bounds || collideRects(tag, bounds)) {
var sprite = tag.sprite,
w = tag.width >> 5,
sw = size[0] >> 5,
lx = tag.x - (w << 4),
sx = lx & 0x7f,
msx = 32 - sx,
h = tag.y1 - tag.y0,
x = (tag.y + tag.y0) * sw + (lx >> 5),
last;
for (var j = 0; j < h; j++) {
last = 0;
for (var i = 0; i <= w; i++) {
board[x + i] |= (last << msx) | (i < w ? (last = sprite[j * w + i]) >>> sx : 0);
}
x += sw;
}
delete tag.sprite;
return true;
}
}
}
return false;
}
cloud.words = function(x) {
if (!arguments.length) return words;
words = x;
return cloud;
};
cloud.size = function(x) {
if (!arguments.length) return size;
size = [+x[0], +x[1]];
return cloud;
};
cloud.font = function(x) {
if (!arguments.length) return font;
font = d3.functor(x);
return cloud;
};
cloud.fontStyle = function(x) {
if (!arguments.length) return fontStyle;
fontStyle = d3.functor(x);
return cloud;
};
cloud.fontWeight = function(x) {
if (!arguments.length) return fontWeight;
fontWeight = d3.functor(x);
return cloud;
};
cloud.rotate = function(x) {
if (!arguments.length) return rotate;
rotate = d3.functor(x);
return cloud;
};
cloud.text = function(x) {
if (!arguments.length) return text;
text = d3.functor(x);
return cloud;
};
cloud.spiral = function(x) {
if (!arguments.length) return spiral;
spiral = spirals[x + ""] || x;
return cloud;
};
cloud.fontSize = function(x) {
if (!arguments.length) return fontSize;
fontSize = d3.functor(x);
return cloud;
};
cloud.padding = function(x) {
if (!arguments.length) return padding;
padding = d3.functor(x);
return cloud;
};
return d3.rebind(cloud, event, "on");
}
function cloudText(d) {
return d.text;
}
function cloudFont() {
return "serif";
}
function cloudFontNormal() {
return "normal";
}
function cloudFontSize(d) {
return Math.sqrt(d.value);
}
function cloudRotate() {
return (~~(Math.random() * 6) - 3) * 30;
}
function cloudPadding() {
return 1;
}
// Fetches a monochrome sprite bitmap for the specified text.
// Load in batches for speed.
function cloudSprite(d, data, di) {
if (d.sprite) return;
c.clearRect(0, 0, (cw << 5) / ratio, ch / ratio);
var x = 0,
y = 0,
maxh = 0,
n = data.length;
di--;
while (++di < n) {
d = data[di];
c.save();
c.font = d.style + " " + d.weight + " " + ~~((d.size + 1) / ratio) + "px " + d.font;
var w = c.measureText(d.text + "m").width * ratio,
h = d.size << 1;
if (d.rotate) {
var sr = Math.sin(d.rotate * cloudRadians),
cr = Math.cos(d.rotate * cloudRadians),
wcr = w * cr,
wsr = w * sr,
hcr = h * cr,
hsr = h * sr;
w = (Math.max(Math.abs(wcr + hsr), Math.abs(wcr - hsr)) + 0x1f) >> 5 << 5;
h = ~~Math.max(Math.abs(wsr + hcr), Math.abs(wsr - hcr));
} else {
w = (w + 0x1f) >> 5 << 5;
}
if (h > maxh) maxh = h;
if (x + w >= (cw << 5)) {
x = 0;
y += maxh;
maxh = 0;
}
if (y + h >= ch) break;
c.translate((x + (w >> 1)) / ratio, (y + (h >> 1)) / ratio);
if (d.rotate) c.rotate(d.rotate * cloudRadians);
c.fillText(d.text, 0, 0);
c.restore();
d.width = w;
d.height = h;
d.xoff = x;
d.yoff = y;
d.x1 = w >> 1;
d.y1 = h >> 1;
d.x0 = -d.x1;
d.y0 = -d.y1;
x += w;
}
var pixels = c.getImageData(0, 0, (cw << 5) / ratio, ch / ratio).data,
sprite = [];
while (--di >= 0) {
d = data[di];
var w = d.width,
w32 = w >> 5,
h = d.y1 - d.y0,
p = d.padding;
// Zero the buffer
for (var i = 0; i < h * w32; i++) sprite[i] = 0;
x = d.xoff;
if (x == null) return;
y = d.yoff;
var seen = 0,
seenRow = -1;
for (var j = 0; j < h; j++) {
for (var i = 0; i < w; i++) {
var k = w32 * j + (i >> 5),
m = pixels[((y + j) * (cw << 5) + (x + i)) << 2] ? 1 << (31 - (i % 32)) : 0;
if (p) {
if (j) sprite[k - w32] |= m;
if (j < w - 1) sprite[k + w32] |= m;
m |= (m << 1) | (m >> 1);
}
sprite[k] |= m;
seen |= m;
}
if (seen) seenRow = j;
else {
d.y0++;
h--;
j--;
y++;
}
}
d.y1 = d.y0 + seenRow;
d.sprite = sprite.slice(0, (d.y1 - d.y0) * w32);
}
}
// Use mask-based collision detection.
function cloudCollide(tag, board, sw) {
sw >>= 5;
var sprite = tag.sprite,
w = tag.width >> 5,
lx = tag.x - (w << 4),
sx = lx & 0x7f,
msx = 32 - sx,
h = tag.y1 - tag.y0,
x = (tag.y + tag.y0) * sw + (lx >> 5),
last;
for (var j = 0; j < h; j++) {
last = 0;
for (var i = 0; i <= w; i++) {
if (((last << msx) | (i < w ? (last = sprite[j * w + i]) >>> sx : 0))
& board[x + i]) return true;
}
x += sw;
}
return false;
}
function cloudBounds(bounds, d) {
var b0 = bounds[0],
b1 = bounds[1];
if (d.x + d.x0 < b0.x) b0.x = d.x + d.x0;
if (d.y + d.y0 < b0.y) b0.y = d.y + d.y0;
if (d.x + d.x1 > b1.x) b1.x = d.x + d.x1;
if (d.y + d.y1 > b1.y) b1.y = d.y + d.y1;
}
function collideRects(a, b) {
return a.x + a.x1 > b[0].x && a.x + a.x0 < b[1].x && a.y + a.y1 > b[0].y && a.y + a.y0 < b[1].y;
}
function archimedeanSpiral(size) {
var e = size[0] / size[1];
return function(t) {
return [e * (t *= .1) * Math.cos(t), t * Math.sin(t)];
};
}
function rectangularSpiral(size) {
var dy = 4,
dx = dy * size[0] / size[1],
x = 0,
y = 0;
return function(t) {
var sign = t < 0 ? -1 : 1;
// See triangular numbers: T_n = n * (n + 1) / 2.
switch ((Math.sqrt(1 + 4 * sign * t) - sign) & 3) {
case 0: x += dx; break;
case 1: y += dy; break;
case 2: x -= dx; break;
default: y -= dy; break;
}
return [x, y];
};
}
// TODO reuse arrays?
function zeroArray(n) {
var a = [],
i = -1;
while (++i < n) a[i] = 0;
return a;
}
var cloudRadians = Math.PI / 180,
cw = 1 << 11 >> 5,
ch = 1 << 11,
canvas,
ratio = 1;
if (typeof document !== "undefined") {
canvas = document.createElement("canvas");
canvas.width = 1;
canvas.height = 1;
ratio = Math.sqrt(canvas.getContext("2d").getImageData(0, 0, 1, 1).data.length >> 2);
canvas.width = (cw << 5) / ratio;
canvas.height = ch / ratio;
} else {
// node-canvas support
var Canvas = require("canvas");
canvas = new Canvas(cw << 5, ch);
}
var c = canvas.getContext("2d"),
spirals = {
archimedean: archimedeanSpiral,
rectangular: rectangularSpiral
};
c.fillStyle = "red";
c.textAlign = "center";
exports.cloud = cloud;
})(typeof exports === "undefined" ? d3.layout || (d3.layout = {}) : exports);
Raw
index.html
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="utf-8">
<title>D3 CSV</title>
</head>
<body>
<script src="http://d3js.org/d3.v3.min.js"></script>
<script src="d3.layout.cloud.js"></script>
<script type="text/javascript">
var fill = d3.scale.category20();
var cityData = [],
width = 500,
height = 500;
d3.csv("us-cities.csv", function(data) {
// build the list of city names
data.forEach( function (d) {
cityData.push(d.place);
});
d3.layout.cloud().size([500, 500])
.words(cityData.map(function(d) {
return {text: d, size: 10 + Math.random() * 90};
}))
.rotate(function() { return ~~(Math.random() * 2) * 90; })
.font("Impact")
.fontSize(function(d) { return d.size; })
.on("end", draw)
.start();
});
function draw(words) {
d3.select("body").append("svg")
.attr("width", 500)
.attr("height", 500)
.append("g")
.attr("transform", "translate(150,150)")
.selectAll("text")
.data(words)
.enter().append("text")
.style("font-size", function(d) { return d.size + "px"; })
.style("font-family", "Impact")
.style("fill", function(d, i) { return fill(i); })
.attr("text-anchor", "middle")
.attr("transform", function(d) {
return "translate(" + [d.x, d.y] + ")rotate(" + d.rotate + ")";
})
.text(function(d) { return d.text; });
}
</script>
</body>
</html>
Raw
us-cities.csv
rank place population lat lon
1 New York city 8175133 40.71455 -74.007124
2 Los Angeles city 3792621 34.05349 -118.245323
3 Chicago city 2695598 45.37399 -92.888759
4 Houston city 2099451 41.337462 -75.733627
5 Philadelphia city 1526006 37.15477 -94.486114
6 Phoenix city 1445632 32.46764 -85.000823
7 San Antonio city 1327407 37.706576 -122.440612
8 San Diego city 1307402 37.707815 -122.466624
9 Dallas city 1197816 40.636 -91.168309
10 San Jose city 945942 41.209716 -112.003047
11 Jacksonville city 821784 30.2887 -81.391794
12 Indianapolis city (balance) 820445 39.766911 -86.149963
13 Austin city 790390 28.973405 -95.961284
14 San Francisco city 805235 28.371795 -82.187909
15 Columbus city 787033 41.258735 -91.374424
16 Fort Worth city 741206 38.0016 -89.066334
17 Charlotte city 731424 39.09931 -76.817799
18 Detroit city 713777 42.408871 -83.002647
19 El Paso city 649121 41.645415 -91.599794
20 Memphis city 646889 35.149681 -90.04892
21 Boston city 617594 41.202364 -112.032315
22 Seattle city 608660 45.520615 -123.873929
23 Denver city 600158 32.96438 -102.829919
24 Baltimore city 620961 39.284664 -76.62022
25 Washington city 601723 38.899101 -77.028999
26 Nashville-Davidson metropolitan government (balance) 601222 45.304048 -121.756365
27 Louisville/Jefferson County metro government (balance) 597337 45.304048 -121.756365
28 Milwaukee city 594833 43.041809 -87.906837
29 Portland city 583776 45.52186 -123.882594
30 Oklahoma City city 579999 39.05514 -96.816104
31 Las Vegas city 583756 40.4879 -85.609999
32 Albuquerque city 545852 35.084179 -106.648643
33 Tucson city 520116 41.644727 -91.601947
34 Fresno city 494665 38.645741 -77.321863
35 Sacramento city 466488 38.915291 -121.594651
36 Long Beach city 462257 29.748022 -94.827603
37 Kansas City city 459787 39.016682 -96.864303
38 Mesa city 439041 30.686452 -97.700842
39 Virginia Beach city 437994 36.767408 -76.047707
40 Atlanta city 420003 37.691375 -122.454979
41 Colorado Springs city 416427 40.17676 -75.547839
42 Raleigh city 403892 41.132609 -73.977405
43 Omaha city 408958 41.260689 -95.94059
44 Miami city 399457 41.63636 -91.501889
45 Tulsa city 391906 39.095215 -121.613384
46 Oakland city 390724 38.334108 -87.345139
47 Cleveland city 396815 36.640475 -82.582569
48 Minneapolis city 382578 44.979031 -93.264931
49 Wichita city 382368 37.686981 -97.335579
50 Arlington city 365438 41.29525 -88.25278
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