question: private final double preNormMBR ( SpatialComparable mbr , final int start , final int end ) { double agg = 0. ; for ( int d = start ; d < end ; d ++ ) { double delta = mbr . getMin ( d ) ; if ( delta < 0. ) { delta = - mbr . getMax ( d ) ; } if ( delta > 0. ) { agg += Math . pow ( delta , p ) ; } } return agg ; }
target:  Compute unscaled norm in a range of dimensions.