Cycloid c_1 = new Cycloid(0, -1.3, 132, 101, 12);
Cycloid c_2 = new Cycloid(0, 1.9, 120, 87, 8);
Cycloid c_3 = new Cycloid(0, 2.9, 199, -83, 6);
Cycloid c_4 = new Cycloid(0, -3.7, 160, -67, 4.5);
Cycloid c_5 = new Cycloid(0, 4.9, 90, 29, 3);
 
 
void setup() { 
  size(750, 750);
  frameRate(36);
  noStroke(); 
} 

public int count = 0;

void draw() 
{ background(255);
  c_1.update(); 
  c_2.update(); 
  c_3.update();
  c_4.update(); 
  c_5.update();
  
  while (dist(c_4.xpos, c_4.ypos, c_5.xpos, c_5.ypos) <= (c_4.ballRadius + c_5.ballRadius)) 
  { c_5.rollingRadius *= -1; break;
  }
  while (dist(c_3.xpos, c_3.ypos, c_5.xpos, c_5.ypos) <= (c_3.ballRadius + c_5.ballRadius)) 
  {  c_5.rollingRadius *= -1; break;
  }
  while (dist(c_2.xpos, c_2.ypos, c_5.xpos, c_5.ypos) <= (c_2.ballRadius + c_5.ballRadius)) 
  {  c_5.rollingRadius *= -1; break;
  }
  while (dist(c_1.xpos, c_1.ypos, c_5.xpos, c_5.ypos) <= (c_1.ballRadius + c_5.ballRadius)) 
  {  c_1.rollingRadius *= -1; break;
  }
  while (dist(c_3.xpos, c_3.ypos, c_4.xpos, c_4.ypos) <= (c_3.ballRadius + c_4.ballRadius)) 
  {  c_4.rollingRadius *= -1; break;
  }
  while (dist(c_2.xpos, c_2.ypos, c_4.xpos, c_4.ypos) <= (c_2.ballRadius + c_4.ballRadius)) 
  {  c_4.rollingRadius *= -1; break;
  }
  while (dist(c_2.xpos, c_2.ypos, c_3.xpos, c_3.ypos) <= (c_2.ballRadius + c_3.ballRadius)) 
  {  c_3.rollingRadius *= -1; break;
  }
  while (dist(c_1.xpos, c_1.ypos, c_3.xpos, c_3.ypos) <= (c_1.ballRadius + c_3.ballRadius)) 
  {  c_3.rollingRadius *= -1; break;
  }
  while (dist(c_1.xpos, c_1.ypos, c_2.xpos, c_2.ypos) <= (c_1.ballRadius + c_2.ballRadius)) 
  {  c_2.rollingRadius *= -1; break;
  }
  while (dist(c_4.xpos, c_4.ypos, c_1.xpos, c_1.ypos) <= (c_4.ballRadius + c_1.ballRadius)) 
  {  c_1.rollingRadius *= -1; break;
  }
  //count++; 
} 
 
class Cycloid
{ 
  float xpos, ypos, angle, radspeed, staticRadius, rollingRadius, ballRadius; 

  Cycloid(float a, float r, float sR, float rR, float bR) 
  {  
    //xpos = x; 
    //ypos = y;
    
    angle = a * TWO_PI / 360;
    radspeed = r * TWO_PI / 360;
    
    staticRadius = sR;
    rollingRadius = rR;
    ballRadius = bR;
  } 
  
  void update() 
  { angle += radspeed;
    xpos = width / 2 + (staticRadius + rollingRadius) * cos(angle) + 
      rollingRadius * cos(angle * (staticRadius + rollingRadius) / rollingRadius);
    ypos = height / 2 + (staticRadius + rollingRadius) * sin(angle) + 
      rollingRadius * sin(angle * (staticRadius + rollingRadius) / rollingRadius);
      
    /*while (count % (rollingRadius * rollingRadius) == rollingRadius * rollingRadius - 1)
    {  radspeed *= random(-2, 2);
       break;
    }*/
    /*fill(255, 32); 
    ellipse(width / 2 + (staticRadius + rollingRadius) * cos(angle), 
    height / 2 + (staticRadius + rollingRadius) * sin(angle), rollingRadius * 2, rollingRadius * 2);
    fill(255, 16);
    ellipse(width / 2, height / 2, staticRadius * 2, staticRadius * 2);*/
    fill(0);
    ellipse(xpos, ypos, ballRadius * 2, ballRadius * 2); 
  } 
}