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<!DOCTYPE html> | |
<html> | |
<meta http-equiv="Content-Type" content="text/html;charset=utf-8"/> | |
<body> | |
<script src="http://d3js.org/d3.v3.js"></script> | |
<script type="text/javascript"> | |
svg = d3.select("body").append("svg") | |
var w = 2000, | |
h = 500, | |
begin = Date.now(); | |
var lines = [ ]; | |
var n = 5; | |
var motion = 80; | |
for (i in d3.range(n)){ | |
var data = d3.range(motion) | |
lines.push({ | |
width: 5, | |
height: 50, | |
speed: 100, | |
index: i, | |
data: data | |
}) | |
} | |
var xscale = d3.scale.linear() | |
.domain([0,motion]) | |
.range([0, w]) | |
var omega = -.22 | |
function line_maker( data, speed ) | |
{ | |
var freq = Math.PI*.4 + 3 * omega * data.index // * 3000 | |
var svgline = d3.svg.line() | |
.x(function(d,i) | |
{ | |
return xscale(d); | |
}) | |
.y(function(d,i) | |
{ | |
var theta = freq * d/motion * Math.PI * 4 | |
var y = data.height * (Math.sin(theta + (n-data.index) * .1 * speed * .18 )); | |
return y | |
}) | |
.interpolate("basis") | |
return svgline(data.data); | |
} | |
var spacing = 26; | |
function lineEnter(d, i) { | |
d3.select(this).selectAll("path.path") | |
.data([d]) | |
.enter() | |
.append("svg:path") | |
.attr("class", "path") | |
.attr("d", function(d,i) { return line_maker( d, 0 )}) | |
.attr("stroke-width", function(e,i) { return e.width;}) | |
.attr("fill", "none") | |
update_spacing() | |
} | |
var svg = d3.select("svg") | |
.attr("width", w) | |
.attr("height", h) | |
.append("svg:g") | |
var line = svg.selectAll("g.line") | |
.data(lines) | |
.enter().append("svg:g") | |
.attr("class", "line") | |
.each(lineEnter); | |
var sm = .39 | |
function update_spacing() | |
{ | |
var th = spacing * n; | |
var hscale = d3.scale.linear() | |
.domain([0, n]) | |
.range([0, h]) | |
console.log("spacing", spacing) | |
d3.selectAll("g.line path") | |
.attr("transform", function(d, i) { | |
return "translate(" + [0, h/2 + th / 2 - spacing * d.index] + ")"; | |
}) | |
} | |
var color = d3.scale.linear() | |
.domain([-1, 1]) | |
.interpolate(d3.interpolateRgb) | |
.range(['#112c6f', '#61a9db']) //hmm | |
var opacity = d3.scale.linear() | |
.domain([0, n]) | |
.range([1, .2]) | |
b = 1; | |
d3.timer(function() { | |
var elapsed = Date.now() - begin | |
var damp = .3 | |
rotate = function(d,i) { | |
var speed = sm * d.speed * elapsed * .1 | |
return "rotate(" + speed + ")"; | |
}; | |
line = d3.selectAll("g.line path") | |
.attr("d", function(d,i) { | |
//var speed = a * d.speed * elapsed + .01 * d.index | |
var speed = sm * .08 * elapsed + d.index * 4 | |
return line_maker( d, speed ) | |
}) | |
.attr("stroke", function(d,i){ return color(d.index);}) | |
.attr("stroke-opacity", function(d,i) { return opacity(d.index);}) | |
}); | |
</script> | |
</body> | |
</html> |
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