/*

Digital Thaumatropes
Created: November, 15, 2018
Author: Verity Griscti
Version: 1.0

This program is meant to recreate the optical illusion of analog thaumatropes and export the ouput to a gif.
(press mouse button to end gif loop)

Two images of the thaumatrop are required (Back & Front). Images must be saved in the same file as the pde.
The script alternates between the two of them quickly recreating the optical illusion.

The output is saved as a .gif Animation so it can be shared easily over the web.

The gifAnimation library is required for this to work.
*/

import gifAnimation.*;
GifMaker gifExport;

int count = 1;

void setup(){
   size(290,175);
   gifExport = new GifMaker(this, "Digital_Thaumascope.gif");
   gifExport.setRepeat(0); //= loop forever
}

void draw(){

  if(count%2 == 0){
  PImage back;
  back = loadImage("InsertImageNameHere.jpg");
    if(count == 2 || count == 4){
      frameRate(2);
    }else{
      frameRate(15);
    }
  image(back,0,0);
  } else {
  PImage front;
  front = loadImage("InsertImageNameHere.jpg");
    if(count == 1 || count  == 3){
      frameRate(2);
    }else{
      frameRate(15);
    }
  image(front,0,0);
  }

  count = count + 1;

  gifExport.setDelay(1);
  gifExport.addFrame();

}

void mousePressed(){
  gifExport.finish();
}