brain_polygons format
(ggseg.formats 0.0.3). The atlases now render without sf and its
GDAL/GEOS/PROJ system libraries, enabling wasm and air-gapped installs.
Plots are unchanged.aicha is now a ggseg_atlas object (from ggseg.formats) containing
both 2D and 3D data. The separate aicha_3d object has been removed.
Use ggplot() + ggseg::geom_brain(atlas = aicha) for 2D plots and
ggseg3d::ggseg3d(atlas = aicha) for 3D plots — both from the same
object.
ggseg.formats is now a hard dependency (in Depends).
Package URLs updated from LCBC-UiO to ggseg GitHub organisation.