import processing.serial.*;
import cc.arduino.*;
import processing.video.*;
Arduino arduino;
int numPixels;
int[] previousFrame;
Capture video;

void setup() {
  size(640, 480);
 println(Arduino.list());
  arduino = new Arduino(this, Arduino.list()[0], 57600);
  arduino.pinMode(2, Arduino.OUTPUT);  
   video = new Capture(this, width, height);
   video.start(); 
    numPixels = video.width * video.height;
  previousFrame = new int[numPixels];
  loadPixels();
}

void draw() {
  if (video.available()) {
        video.read(); 
    video.loadPixels(); 
        int movementSum = 0;
    for (int i = 0; i < numPixels; i++) {
      color currColor = video.pixels[i];
      color prevColor = previousFrame[i];
     
      int currR = (currColor >> 16) & 0xFF; 
      int currG = (currColor >> 8) & 0xFF;
      int currB = currColor & 0xFF;
   
      int prevR = (prevColor >> 16) & 0xFF;
      int prevG = (prevColor >> 8) & 0xFF;
      int prevB = prevColor & 0xFF;
     
      int diffR = abs(currR - prevR);
      int diffG = abs(currG - prevG);
      int diffB = abs(currB - prevB);
          movementSum += diffR + diffG + diffB;
            pixels[i] = color(diffR, diffG, diffB);
           previousFrame[i] = currColor;
    }
    
    if (movementSum >3000000) {
      updatePixels();
     
     arduino.digitalWrite(2,Arduino.HIGH);
    }
    else{
       arduino.digitalWrite(2,Arduino.LOW);
    }
      
  }
}