"surf" objectCoerce a file path to a surface GIFTI, a "gifti" object, a list with
entries "pointset" and "triangle", or a "surf" object to a
"surf" object.
make_surf(surf, expected_hemisphere = NULL)gifti_to_surf(surf, expected_hemisphere = NULL)
Either a file path to a surface GIFTI; a "gifti" object
read by readgii; a list with entries "pointset" and
"triangle"; or, a "surf" object.
The expected hemisphere ("left" or "right")
of surf. If the hemisphere indicated in the GIFTI metadata is the
opposite, an error is raised. If NULL (default), use the GIFTI
hemisphere.
The "surf" object: a list with components "vertices"
(3D spatial locations), "faces" (defined by three vertices), and
"hemisphere" ("left", "right", or NULL if
unknown).