perlin circles

_.md

[ Launch: perlin circles ] 5110744 by enjalot
[ Launch: perlin worms ] 5062100 by enjalot
[ Launch: perlin noise ] 5062000 by enjalot
[ Launch: perlin noise ] 5061982 by enjalot

config.json

{"description":"perlin circles","endpoint":"","display":"svg","public":true,"require":[{"name":"perlin","url":"https://raw.github.com/josephg/noisejs/master/perlin.js"}],"fileconfigs":{"inlet.js":{"default":true,"vim":false,"emacs":false,"fontSize":12},"_.md":{"default":true,"vim":false,"emacs":false,"fontSize":12},"config.json":{"default":true,"vim":false,"emacs":false,"fontSize":12}},"fullscreen":false,"play":true,"loop":false,"restart":false,"autoinit":true,"pause":true,"loop_type":"period","bv":false,"nclones":15,"clone_opacity":0.4,"duration":3000,"ease":"linear","dt":0.01,"thumbnail":"http://i.imgur.com/KOrPW4A.png"}

inlet.js

//playing with noise.js from Joseph Gentle
//https://github.com/josephg/noisejs

var n = 1000;

var period = 0.15;
var rbase = 5;
var r = tributary.sw/100;

var xspace = 25;
var nx = n/(r+xspace)
var yspace = 25;

var z = 0;
var zspeed = 0.01;

//noise.seed(Math.random());

var particles = d3.range(n).map(function(i) {
  return {
    x: (i % nx) * (r + xspace),
    y: Math.floor(i/nx) * (r + yspace),
    r: r
  }
});

var svg = d3.select("svg");

var parts = svg.selectAll("circle.particle")
.data(particles)
.enter()
.append("circle")
.classed("particle", true)
.attr({
  cx: function(d) { return d.x },
  cy: function(d) { return d.y },
  r: function(d) { return d.r }
})
.style({
  "fill": "#198CB1",
  "fill-opacity": 0.5,
  "stroke": "#65119C",
  "stroke-opacity": 0.91,
  "stroke-width": 2.56
})



//v = noise.simplex2(p.x * period, p.y * period);

tributary.run = function(g,t) {
  
  parts.attr({
    r: function(d,i) {
      v = noise.simplex3(d.x * period, d.y * period, z);
      return rbase + (r * v + 5);
    }
  })
  z += zspeed;
}