import controlP5.*;

ControlP5 ctrl;
public int   num_circles = 25; // initial value
int   n_circles;        // current value
int   size_x = 500;
int   size_y = 500;
public float r_min = 5;
public float r_max = 50;
public float additional_distance = 10.0;

color bg = color(10, 10, 50);
float last_overlap = 0.0;

Circle circles[];

void setup() {
  size(size_x, size_y);
  background(bg);
  initialize();
  ctrl = new ControlP5(this);
  ctrl.addButton("restart", 1).linebreak();
  ctrl.addSlider("num_circles", 0, 100).linebreak();
  ctrl.addSlider("r_min", 0, 100).linebreak();
  ctrl.addSlider("r_max", 0, 100).linebreak();
  ctrl.addSlider("additional_distance", 0, 100);
  ctrl.hide();
}

void draw() {
  if (last_overlap == 0.0)
    background(10, 50, 10);
  else {
    background(bg);
    for (int i = 0; i < 30; i++)
      if (evo_step())
        break;
  }
  noStroke();
  for(int i = 0; i < n_circles; i++) {
    circles[i].drawC();
  }
}

public void restart() {
  initialize(); 
}

void initialize() {
  int i;
  float r, x, y, c;
  n_circles = num_circles;
  circles = new Circle[n_circles];
  for(i = 0; i < n_circles; i++) {
    r = r_min + random(r_max-r_min);
    x = r + random((width-2*r));
    y = r + random((height-2*r));
    c = random(100, 255);
    circles[i] = new Circle(x, y, r, color(c, 100));
  }
  last_overlap = overlap();
}