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January 13, 2016 18:10
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Letter Spitter
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<!DOCTYPE html> | |
<meta charset="utf-8"> | |
<style> | |
text { | |
fill: steelblue; | |
font-size: 30px; | |
} | |
</style> | |
<body> | |
<script src="//d3js.org/d3.v3.min.js"></script> | |
<script> | |
var width = window.innerWidth - 40, | |
height = (window.innerHeight * 1.75) - 40, | |
padding = 6, // separation between nodes | |
radius = 15; | |
var m = 11 // total number of coloumns; | |
d3.select('body') | |
.style('height', height + 'px') | |
.style('overflow-y', 'hidden'); | |
var x = d3.scale.ordinal() | |
.domain(d3.range(m)) | |
.rangePoints([0, width], 1); | |
function makeNode(letter){ | |
var column = 0; | |
switch(letter) { | |
case 'Q': | |
case 'A': | |
column = 0; | |
break; | |
case 'W': | |
case 'Z': | |
column = 1; | |
break; | |
case 'S': | |
case 'X': | |
column = 2; | |
break; | |
case 'E': | |
case 'D': | |
column = 3; | |
break; | |
case 'C': | |
case 'R': | |
case 'T': | |
case 'F': | |
case 'V': | |
column = 4; | |
break; | |
case 'Y': | |
case 'H': | |
case 'G': | |
case 'B': | |
column = 5; | |
break; | |
case 'U': | |
case 'N': | |
column = 6; | |
break; | |
case 'J': | |
case 'M': | |
column = 7; | |
break; | |
case 'I': | |
case 'K': | |
column = 8; | |
break; | |
case 'O': | |
case 'L': | |
column = 9; | |
break; | |
case 'P': | |
column = 10; | |
break; | |
default: | |
return false; | |
}; | |
return { | |
letter: letter, | |
x: width/2, | |
y: 0, | |
cx: x(column), | |
cy: height / 2, | |
radius: 10 | |
}; | |
} | |
var nodes = []; | |
var force = d3.layout.force() | |
.nodes(nodes) | |
.size([width, height]) | |
.gravity(0) | |
.charge(0) | |
.on("tick", tick); | |
var svg = d3.select("body").append("svg") | |
.attr("width", width) | |
.attr("height", height); | |
function update(letter){ | |
var node = makeNode(letter); | |
if (node){ | |
nodes.push(node); | |
letters = svg.selectAll("text") | |
.data(nodes); | |
letters | |
.enter() | |
.append("text") | |
.text(function(d){ | |
return d.letter; | |
}); | |
force.nodes(nodes); | |
force.start(); | |
} | |
} | |
d3.select("body") | |
.on("keydown", function() { | |
update(String.fromCharCode(d3.event.keyCode)); | |
}); | |
function tick(e) { | |
letters | |
.each(gravity(.2 * e.alpha)) | |
.each(collide(.5)) | |
.attr("x", function(d) { return d.x; }) | |
.attr("y", function(d) { return d.y; }); | |
letters.attr("x", function(d) { return d.x = Math.max(radius, Math.min(width - radius, d.x)); }) | |
.attr("y", function(d) { return d.y = Math.max(radius, Math.min((height / 2) - radius, d.y)); }); | |
} | |
// Move nodes toward cluster focus. | |
function gravity(alpha) { | |
return function(d) { | |
d.y += (d.cy - d.y) * alpha; | |
d.x += (d.cx - d.x) * alpha; | |
}; | |
} | |
// Resolve collisions between nodes. | |
function collide(alpha) { | |
var quadtree = d3.geom.quadtree(nodes); | |
return function(d) { | |
var r = (2 * radius) + padding, | |
nx1 = d.x - r, | |
nx2 = d.x + r, | |
ny1 = d.y - r, | |
ny2 = d.y + r; | |
quadtree.visit(function(quad, x1, y1, x2, y2) { | |
if (quad.point && (quad.point !== d)) { | |
var x = d.x - quad.point.x, | |
y = d.y - quad.point.y, | |
l = Math.sqrt(x * x + y * y), | |
r = (2 * radius); | |
if (l < r) { | |
l = (l - r) / l * alpha; | |
d.x -= x *= l; | |
d.y -= y *= l; | |
quad.point.x += x; | |
quad.point.y += y; | |
} | |
} | |
return x1 > nx2 || x2 < nx1 || y1 > ny2 || y2 < ny1; | |
}); | |
}; | |
} | |
document.addEventListener("DOMContentLoaded", function(event) { | |
self.frameElement.focus(); | |
}); | |
</script> |
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