// Run this program only in the Java mode inside the IDE,
// not on Processing.js (web mode)!!

import processing.video.*;

Capture cam;

void setup() {
  size(640, 480);
 // check cameras
  String[] cameras = Capture.list();
  if (cameras.length == 0) {
    println("There are no cameras available for capture.");
    exit();
  } else {
    println("Available cameras:");
    for (int i = 0; i < cameras.length; i++) {
      println(i+".  "+cameras[i]);
    }
   }
  //cam = new Capture(this, cameras[0]);
  //Another method
  cam = new Capture(this, 640, 480, 30);
  cam.start();
}

void draw() {
  if(cam.available()) {
    cam.read();
    cam.loadPixels();
    int total = cam.width*cam.height;
    int R,G,B;
    for (int i=0;i<total;i=i+1){
        R=(cam.pixels[i]>>16)&0xff;
        G=(cam.pixels[i]>>8)&0xff;
        B=(cam.pixels[i])&0xff;
        R=(R+G+B)/3;
        cam.pixels[i]=(R<<16)|(R<<8)|(R);
     }
    cam.updatePixels();
   image(cam, 0, 0);
  }
  
  
}