/**
 * Drill Block by Robert Twomey
 * renders an image as varying sized circles, to be cnc routed
 *
 */

PImage a;
int x, y, xstart, ystart, w, h;
boolean drawnext;

int t, b, l, r;

int cart_x, cart_y, cart_w, cart_h;

void setup()
{
  //a = loadImage("eames.jpg");
  a = loadImage("six.jpg");
  //a = loadImage("three_one_640x480.png");
  //a = loadImage("six_160_10levels.jpg");
  //size(a.width*5, a.height*5);
  size(1280, 720);
  noStroke();
  background(255);
  smooth();
  xstart=300;
  ystart=120;
  w=160;
  h=120;
  x=xstart;
  y=ystart;
  drawnext=false;
  cart_x=width-(a.width/4)-20;
  cart_y=height-(a.height/4)-20;
  cart_w=a.width/4;
  cart_h=a.height/4;
  drawCartoon();
}

void keyPressed() {
  drawnext = true;
}

void mousePressed() {
  l=mouseX;
  t=mouseY;
  drawnext=false;
}

void mouseDragged() {
  r=mouseX;
  b=mouseY;
}

void mouseReleased() {
  if(b<t) {
    int temp=t;
    t=b;
    b=temp;
  }
  if(r<l) {
    int temp=r;
    r=l;
    l=temp;
  }
  xstart=round(a.width*norm(l-cart_x, 0, cart_w));
  ystart=round(a.height*norm(t-cart_y, 0, cart_h ));
  w=round(a.width*norm(r-l, 0, cart_w));
  h=round(a.height*norm(b-t, 0, cart_h));

  drawnext=true;
  background(255);
  x=xstart;
  y=ystart;
  drawCartoon();

}

void draw()
{ 
  
  if(drawnext) {

    color pix = a.get(x, y);

    int m=6;
    noFill();
    stroke(255, 0, 0);
    int r = (int)(3*(1.0-norm(brightness(pix),0, 255)));
    ellipse((x-xstart)*m, (y-ystart)*m, r, r);
    stroke(0);
    rect(0, 0, w*m, h*m);
    x+=1;
    if(x>=xstart+w) {
      x=xstart;
      y+=1;
      if(y>=ystart+h) {
        y=ystart;
        drawnext=false;
      }
    }
  } 
  //drawnext=false;

}

void drawCartoon() {
  image(a, cart_x, cart_y, cart_w, cart_h);
  stroke(0);
  noFill();
  rect(cart_x, cart_y, cart_w, cart_h);
  stroke(255, 255, 0);
  rect(l, t, (r-l), (b-t));
  PImage z = a.get(xstart, ystart, w, h);
  image(z, width-z.width*4-20, height-(a.height/4)-40-z.height*4, z.width*4, z.height*4);
}