code: public void grow(float h, float v) {
  		setX(getX() - h);
  		setY(getY() - v);
  		setWidth(getWidth() + (h*2));
  		setHeight(getHeight() + (v*2));
  	}
docs: Grow the rectangle at all edges by the given amounts. This will result in the
  rectangle getting larger around it's centre.
  
  @param h The amount to adjust horizontally
  @param v The amount to ajust vertically