shift.hemis.apart: Shift hemispheres apart.

In fsbrain: Managing and Visualizing Brain Surface Data

Shift hemispheres apart.

Description

Modify mesh coordinates of a hemilist of coloredmeshes to introduce a gap between the two hemispheres.

Usage

shift.hemis.apart(
  coloredmeshes_hl,
  shift_by = NULL,
  axis = 1L,
  hemi_order_on_axis = "lr",
  min_dist = 0
)

Arguments

coloredmeshes_hl	hemilist of coloredmeshes
shift_by	numerical vector of length 2, the amount by which to shift the hemis. The first value is for the left hemi, the second for the right hemi (values can be negative). Pass NULL to determine the shift automatically from the mesh coordinates, and adapt 'hemi_order_on_axis' to define how that happens.
axis	positive integer, one of 1L, 2L or 3L. The axis on which to shift (x,y,z).
hemi_order_on_axis	character string, one of 'auto', 'auto_flipped', 'lr' or 'rl'. Defines how to determine the order of the hemis on the axes. This is ignored unless 'shift_by' is NULL. The 'auto' setting assumes that the hemisphere with the smaller minimal vertex coordinate (on the given axis) comes first. Note that if the overlap (or shift) is extreme, this may not hold anymore. Therefore, the default value is 'lr', which works for FreeSurfer data. The 'auto_flipped' setting will always return the inverse of 'auto', so if 'auto' did not work, 'auto_flipped' will.
min_dist	numerical scalar, the minimal distance of the hemispheres. Ignored unless 'shift_by' is NULL.

Value

hemilist of coloredmeshes, the shifted meshes

fsbrain documentation built on Aug. 23, 2026, 5:06 p.m.