/**
 * LBi Balls
 * By: Anthony Tripaldi
 */

int numBalls = 200;
int orbit = 160;
int range = 300;

int force = 3000;
float half_w;
float half_h;

Ball[] balls = new Ball[numBalls];

void setup()
{
  size(550,500,P3D);
  //frameRate(30);
  fill(255);
  noStroke();
  //sphereDetail(15);
  
  setBalls();
}

void draw()
{
  background(255);
  
  fill(255,0,0);
  //lights();
  
  //simple camera rotation
  half_w = width * 0.5;
  half_h = height * 0.5;
  
  translate( half_w, half_h, 0 );
  //rotate( radians(frameCount * 0.35) );
  
  for( int i = 0; i < numBalls; i++ )
  {
    balls[i].draw(mouseX - half_w, mouseY - half_h);
  }
}

void mousePressed()
{
  println( frameRate );
  //setBalls();
}

void setBalls()
{
  for( int i = 0; i < numBalls; i++ )
  {
    /* 
    //random placement
    balls[i]    =  new Ball(int(random(-range,range)), 
                            int(random(-range,range)),   
                            int(random(8,25)) 
                            );
    */
    
    //circle placement
    float rd    =  random(360);    
    balls[i]    =  new Ball( orbit * cos( TWO_PI * rd/360 ),
                             orbit * sin( TWO_PI * rd/360 ),
                             int( random(5,15) )
                            );
  }
  
  //sets a random connection to another ball guarenteeing 
  //each ball having at least one line
  for( int i = 0; i < numBalls; i++ )
  {
    balls[i].setConnection( balls[ int( random(numBalls) ) ] );
  }
}

class Ball
{
  float x, y;
  float sx, sy, size;
  int seed = int( random(10000) );
  int count = 0;
  
  Ball connect;
  
  Ball( float Sx, float Sy, int Size )
  {
    sx = Sx;
    sy = Sy;
    x = sx;
    y = sy;
    size = Size;
  }
  
  void setConnection( Ball ball )
  {
    connect = ball;
  }
  
  void draw(float mx, float my)
  {
    count++;
    x = x + 15 * sin((seed + count)*.03);
    y = y + 15 * cos((seed + count)*.03);
    
    float xDif = mx-x;
    float yDif = my-y;
    float distance = sqrt(xDif*xDif+yDif*yDif);
    float tempX = x - (force/distance)*(xDif/distance);
    float tempY = y - (force/distance)*(yDif/distance);
    x = (sx - x)/2+tempX;
    y = (sy - y)/2+tempY;

    //2D Circles
    smooth();
    stroke(200);
    line( x, y, 0, connect.x, connect.y, 0 );
    noStroke();
    
    noSmooth();
    float s = size * (sin( (count+seed) * .05 ) + 2 );
    ellipse( x, y, s, s );
    
    /* 
    //3D Sphere
    pushMatrix();
      translate( x, y );
      sphere( size * (sin( (count+seed) * .02 ) + 2 ) );
      stroke(180);
      line( 0, 0, 0, connect.x - x, connect.y - y, 0 );
      noStroke();
    popMatrix();
    */
  }
}