//charles valla-
//space packing 02


int POLY_TYPE = 3;
int N = 7;
int NUM_CIRCLES = POLY_TYPE*N;
int DIA_CIRCLES = 50;
circle[] nCircle;
polynomino nPoly;



void setup(){
  size (500,500);
  background (0);
  fill (255,100);
  smooth();
  ellipseMode(CENTER);
  nPoly = new polynomino();
  nCircle = new circle[NUM_CIRCLES];
  for (int i=0; i<nCircle.length; i++){
    nCircle[i] = new circle ();
  } 
}



void draw(){
  background (200); 
  for (int j=0; j<N; j++){
    nPoly.plot(j);
  }
  for (int j=0; j<N; j++){
    for (int i = j; i<nCircle.length; i = i + N){
      nCircle[i].moveIN(2,j);
    }
  }
  for (int i=0; i<nCircle.length; i++){
    nCircle[i].moveOUT();
    nCircle[i].moveOUTscreen();
    nCircle[i].moveINmouse();
    //nCircle[i].moveINcen(4);
    stroke(150,100);
    nCircle[i].links();
  }
}



void keyPressed(){
  if(key == 'n'){
    for (int i=0; i<nCircle.length; i++){
      nCircle[i] = new circle ();
    } 
  }
}



class polynomino{
  int col;

  polynomino(){
    col = 255/N;
  }

  void plot(int j){
    for (int i=j; i<nCircle.length; i = i + N){
      stroke(0);
      fill (col*j,0,0);
      nCircle[i].grow(0);
    }
  }

}



class circle{
  float x;
  float y;
  float D; 

  circle (){
    x = random (0,width);
    y = random (0,height);
    D = DIA_CIRCLES;
  }

  void grow (float rate){
    D = D + (rate/10) * sin(radians(frameCount));
    ellipse (x,y,D,D);
  }

  void moveINcen (float rate){
    for (int i=0; i<nCircle.length; i = i + 4){
      x = x + (width/2-x)/(pow(10,rate));
      y = y + (height/2-y)/(pow(10,rate));
    }
  }

  void moveIN (float rate,int j){
    for (int i = j; i<nCircle.length; i = i + N){
      x = x + (nCircle[i].x-x)/(pow(10,rate));
      y = y + (nCircle[i].y-y)/(pow(10,rate));
    }
  }

  void moveOUT (){   
    float Vx, Vy, d;
    for (int i=0; i<nCircle.length; i++){
      d = dist(nCircle[i].x, nCircle[i].y,x,y);
      Vx = (D-d)/D*(nCircle[i].x-x);
      Vy = (D-d)/D*(nCircle[i].y-y);   
      if ( d < D ){
        x = x - Vx;
        y = y - Vy;
      }
    } 
  }

  void moveOUTscreen (){   
    for (int i=0; i<nCircle.length; i++){  
      if ( x < 0+DIA_CIRCLES/2){
        x = x + 1;
      }
      if ( y < 0+DIA_CIRCLES/2){
        y = y + 1;
      }
      if ( x > width-DIA_CIRCLES/2){
        x = x - 1;
      }
      if ( y > height-DIA_CIRCLES/2){
        y = y - 1;
      }
    } 
  }

  void links (){
    float d;
    for (int i=0; i<nCircle.length; i++){
      d = dist(nCircle[i].x, nCircle[i].y,x,y);
      if (d < D+D/2){
        line (nCircle[i].x, nCircle[i].y,x,y);
      }
    }
  }

  void moveINmouse (){
    for (int i=0; i<nCircle.length; i++){
      if (mousePressed){
        x = x - (mouseX-x)/1000;
        y = y - (mouseY-y)/1000;
      }
    }
  } 

}