//adapted by joana kelly from the brightness tracking code written by Golan Levin 

int numFrames = 13;
PImage[] images = new PImage[numFrames];

// Tracks the brightest pixel in a live video signal
import processing.video.*;
Capture video;

void setup(){
  background(0);
  size(640, 480); 

  for (int i = 0; i < images.length; i++){
    String imageName = "sprite" + nf(i,0) + ".png";
    // println(imageName);
    images[i] = loadImage(imageName);
  }
  
  video = new Capture(this, width, height, 30);
  noStroke();
  smooth();
}

void draw() {
  frameRate(10);
  int frame = frameCount % numFrames;
  if (video.available()) {
    video.read();
    image(video, 0, 0, 100, 80); // Draw the webcam video onto the screen
    int brightestX = 0; // X-coordinate of the brightest video pixel
    int brightestY = 0; // Y-coordinate of the brightest video pixel
    int PbrightestX = brightestX -1;
    int PbrightestY = brightestY-1;
    float brightestValue = 0; // Brightness of the brightest video pixel
    // Search for the brightest pixel: For each row of pixels in the video image and
    // for each pixel in the yth row, compute each pixel's index in the video
    video.loadPixels();
    int index = 0;
    for (int y = 0; y < video.height; y++) {
      for (int x = 0; x < video.width; x++) {
        // Get the color stored in the pixel
        int loc = (video.width - x - 1) + y*video.width;
        int pixelValue = video.pixels[loc];
        // Determine the brightness of the pixel
        float pixelBrightness = brightness(pixelValue);
        // If that value is brighter than any previous, then store the
        // brightness of that pixel, as well as its (x,y) location
        // callibrate brightness
        if (pixelBrightness > 100){
          brightestValue = pixelBrightness;
          //  println("brightness is " + brightestValue);
          //  println("pixel brightness is" + pixelBrightness);
          brightestY = y;
          brightestX = x;
        }
        index++;
      }
    }
    
    // Draw a large, yellow circle at the brightest pixel
    //rect(0,0,width, height);
    //for (float z = 0; z<255; z++){
    //   fill(random(255+z),random(255),random(255));
    //  }

    image(images[frame], brightestX, brightestY);

    // rect(brightestX, brightestY,12,12);
    //  filter(THRESHOLD, 0.3);

  }
}