Algorithm 1. Calculation of H value
Input:	$v$, a point in $R^N$
	m, the order of the Hilbert curve
Output:	H, the coordinate of $v$ in $R^1$, i.e., Hilbert code, H-code
1:	for each order in m
2:	Get $p$ which is made from the highest bit binary of each dimension of $v$.
3:	Inquire $C^N$ to get the H-order corresponding to $p$
4:	Put H-order in the top digit of H;
5:	if the current order is not the last one
6:	Inquire $G^N$ to get the coordinate
7:	Transformation information of H-order
8:	Complete the coordinate transformation of the remainder binary code of $v$
9:	Reset residual value
10:	end if
11:	end for
12:	return H