101.coffee

fs = require 'fs'
d3 = require 'd3'
d3Node = require 'd3-node'
canvasModule = require 'canvas-prebuilt'
randGen = require 'random-seed'
d3n = new d3Node { canvasModule }
argv = require 'yargs'
  .alias 's', 'seed'
  .argv

run = ->
  if argv.seed
    seed = argv.seed
  else
    seed = Date.now()
  makeArt seed
makeArt = (seed) ->
  rand = new randGen()
  rand.seed(seed)

  console.log('seed', seed)

  canvas = d3n.createCanvas 850,625
  ctx = canvas.getContext '2d'

  width = canvas.width
  height = canvas.height

  data = d3.range(420).map ->
    {
      x: rand(width)
      y: rand(height)
    }

  data.forEach((d,i) ->
    ctx.beginPath()
    ctx.rect d.x, d.y, 2, 120
    ctx.fillStyle = 'black'
    ctx.fill()
    ctx.closePath()
  )

  fileOutput = './dist/' + seed + '.png'
  console.log('canvas output --> ' + fileOutput);

  # Save image locally to /dist/
  canvas.pngStream().pipe(fs.createWriteStream(fileOutput))

  return canvas

module.exports = makeArt
if(require.main == module)
  run()