import processing.video.*;

import processing.sound.*;

SoundFile file;

Capture cam;//webcam pic one
Capture cam2;
int count=0;
PImage myImg=null;//save pic as a PImage
PImage myImg2=null;

void setup() {
  frameRate(1);

  size(600, 300);
  cam = new Capture(this, 320, 240, 30);
  cam.start();
    cam2 = new Capture(this, 320, 240, 30);
  cam2.start();
  // file = new SoundFile(this, sketchPath("intruder.mp3"));//audio file

}

void draw() {
  println(count);
  if(count<2){
  if(cam.available()) {
    cam.read();//when camera is ready we'll take a pic
    myImg=cam;
    count++;
  }
  }else{
    if(cam2.available()) {
    cam2.read();//after first pic was taken, we'll take this one
    myImg2=cam2;//save it as a PImage

  }
  }
  if(myImg!=null && myImg2!=null){//if both images have been
  //taken, we'll display them to the screen
         image(myImg, 0, 0,200,200);
         image(myImg2, 300, 0,200,200);
          loadPixels();//load the pixels
          myImg.loadPixels();
          myImg2.loadPixels();
          int pixelYPosition;
          int pixelXPosition;
          int counts=0;
          int spotter=0;


          //turns out you can typically get away with only looking at a small portion
          //of the pixels and it will still work.
   for (pixelYPosition = 0; pixelYPosition < 200; pixelYPosition++) {
    for (pixelXPosition = 0; pixelXPosition < 200; pixelXPosition++) {

      int loc = spotter;//pixelXPosition + pixelYPosition * i1.width;
      int loc1 = spotter;//pixelXPosition + pixelYPosition * i2.width;

      float r = red(myImg.pixels[spotter]);//break image into RGB values
      float g = green(myImg.pixels[spotter]);
      float b = blue(myImg.pixels[spotter]);

      float r2 = red(myImg2.pixels[spotter]);//second image
      float g2 = green(myImg2.pixels[spotter]);
      float b2 = blue(myImg2.pixels[spotter]);
 spotter++;
      if (Math.abs(r - r2)>55){//only need to look at red                                   //&& (!(g == g2) && (!(b == b2)))) {
        //if ABS difference is more than 55 we cound that as a difference
        counts++;

      }

    }
  }

   println("num of diffs: " + counts);
          if(counts>800){//if we have found enough differences to make it significant
            println("WE HAVE MOTION DETECTED ");
         //   file.play();//audio file
            count=0;
             myImg=null;
             myImg2=null;
          }else{

             println("NO Movement ");
          }

          updatePixels();

       }//if NULLL

}