חיתוך מלבנים

private boolean isPointInRect(Point p) {

            return ((p.getX() >= LL.getX() && p.getX() <= LR.getX())&&

                  (p.getY() <= UL.getY() && p.getY() >= LL.getY()));

      }

      // # 1

      public boolean checkAllCorners(Rect r1) {

            boolean flag = false;

            flag = flag || isPointInRect(r1.LL);

            flag = flag || isPointInRect(r1.LR);

            flag = flag || isPointInRect(r1.UL);

            flag = flag || isPointInRect(r1.UR);

            flag = flag || r1.isPointInRect(LL);

            flag = flag || r1.isPointInRect(LR);

            flag = flag || r1.isPointInRect(UL);

            flag = flag || r1.isPointInRect(UR);

            return flag;

      }

      public boolean checkRule4(Rect r1) {

            boolean flag1, flag2;

            flag1 =  (UL.getX() <= r1.UL.getX() && r1.UR.getX() <= UR.getX());

            flag1 = flag1 && (r1.UL.getY() >=  UL.getY() && LL.getY() >= r1.LL.getY());

            flag2 = (r1.UL.getX() <= UL.getX() && UR.getX() <= r1.UR.getX());

            flag2 = flag2 && (UL.getY() >=  r1.UL.getY() && r1.LL.getY() >= LL.getY());

            return flag1 || flag2;

      }

      public boolean hasIntersction(Rect r1) {

            return checkAllCorners(r1) || checkRule4(r1);

      }