Wave displaced circle

Processing Coding Questions
5

Good job !

I was stuck on this part :

float radDist(float t1, float t2) {
  while (t1>=TWO_PI) t1-= TWO_PI;
  while (t1<0) t1 += TWO_PI;

  while (t2>=TWO_PI) t2-= TWO_PI;
  while (t2<0) t2 += TWO_PI;

  float d = abs(t1-t2);
  if (d>=PI) {
    d = PI-(d-PI);
  }
  return d;
}

Thanks @lmccandless @kfrajer