private int countAreas(Area a, Rectangular r)
    {
        int ret = 0;
        
        for (int i = 0; i < a.getChildCount(); i++)
        {
            Area n = a.getChildAt(i);
            if (a.getTopology().getPosition(n).intersects(r))
                ret++;
        }
        return ret;
    }
private int countAreas ( Area a , Rectangular r ) { int ret = 0 ; for ( int i = 0 ; i < a . getChildCount ( ) ; i ++ ) { Area n = a . getChildAt ( i ) ; if ( a . getTopology ( ) . getPosition ( n ) . intersects ( r ) ) ret ++ ; } return ret ; }
Counts the number of sub-areas in the specified region of the area
@param a the area to be examined
@param r the grid region of the area to be examined
@return the number of visual areas in the specified area of the grid