Orbiting circles

gistfile1.pde

int steps = 40;
Orbiter[] Orb = new Orbiter[steps]; // tmpX, tmpY, tmpOff, tmpDiam, tmpIncr
float r = 0;
float rad, off;
float the = 0;

void setup() {
  float x, y;
  size(500, 500);
  background(0);
  stroke(255);
  rad = 100;

  for (int i = 0; i < int(steps); i++) {
    x = width/2 + sin(r) * rad;
    y = height/2 + cos(r) * rad;
    //off = -TAU*1/(float)steps; 
    off =  noise(frameCount/1000) * -.5*r ;
    //off = -r;
    fill(255);
    noStroke();
    Orb[i]= new Orbiter(x, y, off, 200, 0.03);    
    r += TAU/steps;
  }
}


void draw() {
  fill(#27171A);
  noStroke();
  rect(0, 0, width, height);
  fill(0);
  //ellipse(width/2, height/2, width*1, height*1);
  for (int i = 0; i < steps; i ++) {
    Orb[i].display();
  }
  
  println(the);
  the += .03;
  if (frameCount % 6 == 0 && frameCount < 211) {
    saveFrame("line-####.gif");
  }
  
  if (the > TAU) {
  noLoop();
  }
  
  
}

class Orbiter {
  float diam, incr, offset, x, y, xpos, ypos;
  float theta = 0.0;

  Orbiter(float tmpX, float tmpY, float tmpOff, float tmpDiam, float tmpIncr) {
    offset = tmpOff;
    diam = tmpDiam;
    xpos = tmpX;
    ypos = tmpY;
    incr = tmpIncr;   
  }

  void display() {
    noFill();
    stroke(255);
    //ellipse(xpos, ypos, diam, diam);
    fill(255,50);
    stroke(255);
    strokeWeight(2);
    x = xpos + sin(theta+offset)* diam/2;
    y = ypos + cos(theta+offset)* diam/2;
    ellipse(x, y, 80, 80);

    theta += incr;
  }
}