docs: public boolean overlapSave(SphereCluster other){
  		//use basic geometry to figure out the maximal degenerated cluster
  		//comes down to Max(radius *(sin alpha + cos alpha)) which is
  		double minDist = Math.sqrt(2)*(getRadius() + other.getRadius());
  		double diff = getCenterDistance(other) - minDist;
  
  		if(diff > 0)
  			return true;
  		else
  			return false;
  	}