sfc_transformation: Transformations of a sequence

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

Transformations of a sequence

Description

Transformations of a sequence

Usage

## S4 method for signature 'sfc_sequence'
sfc_rotate(p, rot)

## S3 method for class 'sfc_sequence'
e1 ^ e2

## S4 method for signature 'sfc_sequence'
sfc_hflip(p, fix_ends = FALSE, bases = NULL)

## S4 method for signature 'sfc_sequence'
sfc_vflip(p, fix_ends = FALSE, bases = NULL)

## S4 method for signature 'sfc_sequence'
sfc_dflip(p, slop = 1L, fix_ends = FALSE, bases = NULL)

## S4 method for signature 'sfc_sequence'
sfc_reverse(p)

## S3 method for class 'sfc_sequence'
rev(x)

Arguments

p, e1	An 'sfc_sequence' object.
rot, e2	Rotation measured in the polar coordinate system, in degrees.
fix_ends	By default, the curve is flipped as a complete whole, which means, the associated entry and exit directions of the curve is also adjusted accordingly. When flipping subunits in a curve, e.g. level-1 subunits in a Peano curve, we want the entry and exit direction of the subunit not changed so that the subunits are still connected in the curve after the flipping. In this case, 'fix_ends' can be set to 'TRUE', then only the subunits are flipped while the connections to neighbouring subunits are not affected. See the **Examples** section.
bases	A list of base patterns, consider to use ['BASE_LIST']. It is only used when 'fix_ends = TRUE'.
slop	Slop of the diagonal. Value can only be 1 or -1.
x	An 'sfc_sequence' object.

Details

- 'sfc_rotate()' and '^()' rotate each base pattern. - 'sfc_hflip()' flips a sequence horizontally. - 'sfc_vflip()' flips a sequence vertically. - 'sfc_dflip()' flips a sequence against a diagonal line (with slop 1 or -1).

Value

An 'sfc_sequence' object.

Examples

p = sfc_3x3_meander("R", 2, rot = -90)
draw_multiple_curves(
    p, 
    sfc_hflip(p), 
    sfc_hflip(p, fix_ends = TRUE), 
    nrow = 1)
p = sfc_3x3_meander("L", 2, rot = -90)
draw_multiple_curves(
    p, 
    sfc_vflip(p), 
    sfc_vflip(p, fix_ends = TRUE), 
    nrow = 1)
p = sfc_3x3_peano("I", 2)
draw_multiple_curves(
    p, 
    sfc_dflip(p, 1), 
    sfc_dflip(p, 1, fix_ends = TRUE), 
    nrow = 1)

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