code: public double transform(double tolerance) {
  		// the function should be implemented as follows: find encompassing
  		// circle for the transformed circle of radius = Tolerance.
  
  		// this is approximation.
  		Point2D pt1 = new Point2D();
  		Point2D pt2 = new Point2D();
  		/*
  		 * pt[0].Set(0, 0); pt[1].Set(1, 0); pt[2].Set(0, 1); Transform(pt);
  		 * pt[1] -= pt[0]; pt[2] -= pt[0];
  		 */
  
  		pt1.setCoords(xx, yx);
  		pt2.setCoords(xy, yy);
  		pt1.sub(pt1);
  		double d1 = pt1.sqrLength() * 0.5;
  		pt1.setCoords(xx, yx);
  		pt2.setCoords(xy, yy);
  		pt1.add(pt2);
  		double d2 = pt1.sqrLength() * 0.5;
  		return tolerance * ((d1 > d2) ? Math.sqrt(d1) : Math.sqrt(d2));
  	}
docs: Transforms a tolerance value.
  
  @param tolerance
  The tolerance value.