Visualization

ArrayList<Circle> poop  = new ArrayList();

PImage img;

void setup() {

  size(300, 300);

  //String url = "http://dogtowndogtraining.com/wp-content/uploads/2012/06/300x300-061-e1340955308953";

  img = loadImage("dog.jpg");

  color ck = get(width/2, height/2);

  ck = color(ck, 80);

  Circle c = new Circle(width>>1, height>>1, width/2, ck );

  poop.add(c);

}

int k=0;

void draw() {

  background(-1);

  if (k<1) image(img, 0, 0); 

​

  for (int i=0; i<poop.size (); i++) {

    Circle C = poop.get(i);

    C.show();

  }

  for (int i=0; i<poop.size (); i++) {

    Circle C = poop.get(i);

    if (dist(mouseX, mouseY, C.x, C.y)<C.r) {

      k =2;

      poop.remove(i);

      for (int kx=0; kx<2; kx++) {

        for (int ky=0; ky<2; ky++) {

          color c = img.get(int(pow(-1, kx)*C.r/2+C.x), int(pow(-1, ky)*C.r/2+C.y));

          Circle C1 = new Circle(pow(-1, kx)*C.r/2+C.x, pow(-1, ky)*C.r/2+C.y, C.r/2, c);

          poop.add(C1);

          press =false;

        }

      }

    }

  }

}

boolean press=false;

void mouseDragged() {

  press = true;

  k++;

}

​

​

class Circle {

  float x, y, r;

  color c;

  Circle(float x, float y, float r, color c) {

    this.x = x;

    this.y = y;

    this.r = r;

    this.c = c;

  }

  void show() {

    noStroke();

    fill(c);

    ellipse(x, y, 2*r, 2*r);

  }

}