/**
FeedbackDrWho.pde<br>
Dave Bollinger Jun 2007<br>
http://www.davebollinger.com<br>
<br>
Usage:  just watch the pretty color.<br>
<br>
Apologies to non-sci-fi geeks who don't get the "Dr. Who" reference. :D<br>
<br>
*/
import processing.opengl.*;
FeedbackEffects fbfx; // the feedback texturizer

void setup() {
  size(256,256,OPENGL);
  fbfx = new FeedbackEffects(this, 0f, 1f, 252f);
  fbfx.wiggle(true, 0.05, 0.05, 0f);
  fbfx.wobble(true, 0.3, 0.02, 1.1f);
  colorMode(HSB);
}

void draw() {
  background(0);
  fbfx.draw(); // draw the feedback texture as background
  addColor(); // draw new source material
  fbfx.grab(); // grab frame as texture for next frame
}

void addColor() {
  fill(color(random(256), 255, 255, 128));
  noStroke();
  ellipse(width/2f+random(-5,5), height/2f+random(-5,5), 10, 10);
}