Remake of http://beesandbombs.tumblr.com/post/118139231509/from-the-archive
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August 21, 2016 05:30
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spinning-spiral
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<!DOCTYPE html> | |
<meta charset="utf-8"> | |
<style> | |
#conter{ | |
position: absolute; | |
color: white; | |
font-family: monospace; | |
} | |
body{ | |
background-color: rgb(38, 38, 38); | |
} | |
path{ | |
stroke: white; | |
stroke-width: 11px; | |
fill: none; | |
} | |
</style> | |
<body> | |
<div id='conter'></div> | |
</body> | |
<script src="/1wheel/raw/67b47524ed8ed829d021/d3-3.5.5.js"></script> | |
<script> | |
var width = 960, | |
height = 500, | |
maxR = 200, | |
periods = 8, | |
n = 480, | |
cycle = n/periods | |
var svg = d3.select('body') | |
.append('svg') | |
.attr({height: height, width: width}) | |
.append('g') | |
.attr('transform', 'translate(' + [width/2, height/2] + ')') | |
svg.append('path') | |
// svg.append('path') | |
var toAngle = d3.scale.linear().domain([0, n/periods]).range([0, Math.PI*2]) | |
var toDist = d3.scale.linear().domain([0, n]).range([0, maxR]) | |
var ticks = d3.range(n) | |
var pathA = [] | |
var pathB = [] | |
d3.timer(function(t){ | |
var s = t/5 | |
var offset = s % cycle | |
ticks.forEach(function(i){ | |
var θ = toAngle(i +offset) | |
// var distOff = | |
var dist = toDist(i) + Math.sin(s/cycle)*maxR/periods*(i/n) | |
pathA[i] = [Math.cos(θ)*dist, Math.sin(θ)*dist] | |
}) | |
svg.selectAll('path').data([pathA, pathB]).attr('d', pointsToPath) | |
d3.select('#conter').text([offset, Math.sin(s/cycle)*10].map(Math.round)) | |
}) | |
function pointsToPath(array){ | |
return 'M' + array.join('L') | |
} | |
</script> |
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