sfc_expand: Expand the curve to the next level

In sfcurve: 2x2, 3x3 and Nxn Space-Filling Curves

Expand the curve to the next level

Description

Expand the curve to the next level

Usage

## S4 method for signature 'sfc_2x2'
sfc_expand(p, code, flip = FALSE)

## S4 method for signature 'sfc_3x3_peano'
sfc_expand(p, code = 1, flip = FALSE)

## S4 method for signature 'sfc_3x3_meander'
sfc_expand(p, code, flip = FALSE)

Arguments

p	An 'sfc_2x2' object or other related objects.
code	Expansion code, a single integer.
flip	Whethe to flip level-1 units? The value should be a logical vector of length one or the same as the length of 'p'.

Details

For the Hilbert curve and Meander curve, as long as the expansion code of the first base pattern in the sequence is determinted, the expansion codes for other base patterns in the sequence are all determined. For the Peano curve, since there is only one traverse path on any level, 'code' is ignored.

These functions are mainly used internally.

Value

An object in the same class as the input.

Examples

p = sfc_2x2("I", 11)
sfc_expand(p, 2) # I|211
p = sfc_3x3_peano("I", 11)
sfc_expand(p, 2) # I|211
p = sfc_3x3_meander("I", 11)
sfc_expand(p, 2) # I|211

sfcurve documentation built on April 10, 2026, 5:06 p.m.