//from the lovely  miss Jia Zhang
import processing.video.*;

static public void main(String args[]) { 
  PApplet.main(new String[] { 
    "--present", "prototype_motiondetect_1"   }
  ); 
}
float z = 0.0;
float k = 0.0;
float q = 0;
float angle;
int numFrames = 18;
PImage[] images = new PImage[numFrames];


int numPixels;
int[] previousFrame;
Capture video;
int cellSize = 50;


void setup(){
  size(screen.width, screen.height);
  video = new Capture(this, width, height, 24);
  numPixels = video.width * video.height;
  previousFrame = new int[numPixels];
  for (int i = 0; i < images.length; i++){
    String imageName = "tetris" + nf(i,0) + ".png";
    // println(imageName);
    images[i] = loadImage(imageName);
  }
  smooth();
}


void draw() {
  noCursor();
  frameRate(30);
  background(0);
  if (video.available()) {
    video.read(); // Read the new frame from the camera
    video.loadPixels(); // Make its pixels[] array available
    int movementSum = 0; // Amount of movement in the frame
    loadPixels();
    for (int i = 0; i < numPixels; i++) { // For each pixel in the video frame...
      color currColor = video.pixels[i];
      color prevColor = previousFrame[i];
      int currR = (currColor >> 16) & 0xFF; // Like red(), but faster (see p. 673)
      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;
    }
    println(movementSum);
    background(0);
    if(movementSum < 8000000){
      bigTetris(true);
      println("moving slowly ");
    }
    
    else if ((movementSum < 10000000) && (movementSum >=8000000)){
      shakeTetris(true);
      println("moving medium");
    }
    
    else if(movementSum > 12000000){
      twistTetris();
      //drawTetris();
      //largeTetris(true);
      println("moving fast");
    }
  }
}




void bigTetris(boolean big){
  if (big){
    int i =0;
    for (k = 0; k <= width; k+=width/17 + 30){   
      image(images[i], k, 0,images[i].width/3, images[i].height/3); 
      image(images[i], k, 150,images[i].width/3, images[i].height/3); 
      image(images[i], k, 300,images[i].width/3, images[i].height/3);
      image(images[i], k, 450,images[i].width/3, images[i].height/3);
      image(images[i], k, 600,images[i].width/3, images[i].height/3);
      image(images[i], k, 750,images[i].width/3, images[i].height/3);

      i++;
    }
  }
}
void shakeTetris(boolean big){
  if (big){
    int i =0;
    for (z = 10; z <= width; z+=width/17 + 30){   
      image(images[i], z+(random(-7,7)), 0+(random(-7,7)),images[i].width/3, images[i].height/3); 
      image(images[i], z+(random(-4,4)), 150+(random(-7,7)),images[i].width/3, images[i].height/3); 
      image(images[i], z+(random(-2,4)), 300+(random(-7,7)),images[i].width/3, images[i].height/3);
      image(images[i], z+(random(-4,2)), 450+(random(-7,7)),images[i].width/3, images[i].height/3);
      image(images[i], z+(random(-3,3)), 600+(random(-7,7)),images[i].width/3, images[i].height/3);
      image(images[i], z+(random(-6,6)), 750+(random(-7,7)),images[i].width/3, images[i].height/3);
      i++;
    }
  }

}

void largeTetris(boolean big){
  if (big){
    int i =0;
    for (z = 10; z <= width; z+=width/17 + 30){   
      image(images[i], z+(random(-7,7)), 0+(random(-7,7)),images[i].width, images[i].height); 
      image(images[i], z+(random(-4,4)), 150+(random(-7,7)),images[i].width, images[i].height); 
      image(images[i], z+(random(-2,4)), 300+(random(-7,7)),images[i].width, images[i].height);
      image(images[i], z+(random(-4,2)), 450+(random(-7,7)),images[i].width, images[i].height);
      image(images[i], z+(random(-3,3)), 600+(random(-7,7)),images[i].width, images[i].height);
      image(images[i], z+(random(-6,6)), 750+(random(-7,7)),images[i].width, images[i].height);
      i++;
    }
  }

}

void twistTetris(){
  int i =0;
  for (z = 10; z <= width; z+=width/17){   
    angle = angle + 0.2;
    translate(500,370);
    rotate(angle);
    image(images[i], q, z,images[i].width/2, images[i].height/2); 
    image(images[i], q+300, z,images[i].width/3, images[i].height/3); 
    image(images[i], q+700, z, images[i].width/4, images[i].height/4); 
    i++;
    q+= 2;

    if (q > 780){
      q = -15;
    }
  }
}

void drawTetris(){
    int i =0;
    for (z = 10; z <= width; z+=123){   
      image(images[i], z, q+(random(1, 500)));
      image(images[i], z, (q-600)+(random(1,500)));
      i++;
      q+= 2;
      if (q > 740){
        q = -15;
      }
    }
  }