import processing.video.*;
import processing.serial.*;

Serial arduino;

PImage nolaser;
PImage laser;

Capture video;

int currentState = 0;

void setup() {
  size(640, 240); //So we can display two side-by-side images
  println(Capture.list());
  video = new Capture(this, 320, 240, 1); //About the size my camera is, and on a slow framerate.
  arduino = new Serial(this, "/dev/tty.usbserial-A4001tLy", 9600); // Start the arduino
  arduino.write('A'); //Initialize communication

  println("setup done");
}

void draw() 
{
  switch( currentState )
  {
  case 0: // laser off, get a frame (when available)
    if( video.available() )
    {
      video.read();
      image(video, 0, 0);
      arduino.write('G');
      currentState = 1;
    }
    break;

  case 1: // waiting for "laser on" confirmation
    if( arduino.available() > 0 )
    {
      arduino.read();
      currentState = 2;
    }
    break;

  case 2: // laser is on, get a frame (when available)
    if( video.available() )
    {
      video.read();
      image(video, 0, 0);
      arduino.write('F');

      currentState = 3;
    }
    break;

  case 3: // waiting for "laser off" confirmation
    if( arduino.available() > 0 )
    {
      arduino.read();
      currentState = 0; // repeat the cycle..
    }
    break;
  }
}