JoyDivision.frink

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/* Make a graphic like the iconic cover of Joy Division's Unknown Pleasures
   album.  See:

   http://blogs.scientificamerican.com/sa-visual/2015/02/18/pop-culture-pulsar-origin-story-of-joy-divisions-unknown-pleasures-album-cover-video/
*/
class JoyDivision
{
   var g is graphics = new graphics

   var row = 0

   var rowSpacing = 1.25

   var rowWidth = 50

   var rowHeight = 10

   var bgcolor = new color[0,0,0]
   var fgcolor = new color[1,1,1]

   new[] :=
   {
      g.backgroundColor[bgcolor]
      g.color[fgcolor]
      g.stroke[.3]
   }

   /** Add a line of points to the bottom of the image.  Each point should be
       between 0 and 1. */
   addLine[points] :=
   {
      filled = new filledPolygon
      filled.addPoint[0,row]
      
      trace = new polyline
      size = length[points]
      xstep = rowWidth / size
      x = 0
      
      for point = points
      {
         y = row - point * rowHeight
         filled.addPoint[x, y]
         trace.addPoint[x, y]
         x = x + xstep
      }
      filled.addPoint[x, row]
      
      g.color[bgcolor]
      g.add[filled]
      g.color[fgcolor]
      g.add[trace]
      
      row = row + rowSpacing
   }
}

jd = new JoyDivision

for row = 1 to 80
{
   line = new array
   lasty = 0
   for x = -20 to 25
   {
      y = .2 * -(abs[x]-20)/20
      line.push[abs[randomGaussian[0,(y+ 3 lasty)/4]]]
      lasty = (y+ 3 lasty)/4
   }

   jd.addLine[line]
}

jd.g.show[]



Download or view JoyDivision.frink in plain text format

This is a program written in the programming language Frink.
For more information, view the Frink Documentation or see More Sample Frink Programs.

Alan Eliasen was born 20143 days, 10 hours, 48 minutes ago.