code: public void normalize() {
  		if (llx > urx) {
  			float a = llx;
  			llx = urx;
  			urx = a;
  		}
  		if (lly > ury) {
  			float a = lly;
  			lly = ury;
  			ury = a;
  		}
  	}
docs: Normalizes the rectangle.
  Switches lower left with upper right if necessary.