"gifti"Format a "surf" or a list with elements "pointset"
and "triangle" as a "gifti" using a template
"gifti". The brain hemisphere (left or right) must be indicated.
as.surf_gifti(surf, hemisphere = c("left", "right"))The "gifti"
A "surf" or a list with elements
"pointset" and "triangle"
The side of the brain the surface represents: "left"
(default) or "right". Used to fill the "AnatomicalStructurePrimary"
metadata field. Only used if surf$hemisphere is NULL.