add_glassbrain: Add glass brain to ggseg3d plot

In ggseg3d: Interactive 3D Brain Atlas Visualization

Add glass brain to ggseg3d plot

Description

Adds a translucent brain surface to a ggseg3d plot for anatomical reference. Particularly useful for subcortical and tract visualizations where spatial context helps interpretation. Works with both htmlwidget ('ggseg3d') and rgl ('ggsegray') objects.

Usage

add_glassbrain(
  p,
  hemisphere = c("left", "right"),
  surface = "inflated",
  colour = "#CCCCCC",
  opacity = 0.3,
  brain_meshes = NULL
)

Arguments

p	A 'ggseg3d' widget or 'ggsegray' rgl object.
hemisphere	Character vector. Hemispheres to add: "left", "right", or both.
surface	Character. Surface type. Defaults to '"inflated"', which is supplied by 'ggseg.formats' and requires no additional dependency. Other surfaces ('"pial"', '"white"', etc.) are drawn from 'ggseg.meshes'.
colour	Character. Colour for the glass brain surface (hex or named).
opacity	Numeric. Transparency of the glass brain (0-1).
brain_meshes	Optional user-supplied brain meshes. See [ggseg.formats::get_brain_mesh()] for format details.

Value

The input object (modified), for piping.

Examples

ggseg3d(atlas = aseg()) |>
  add_glassbrain("left", opacity = 0.2)

## Not run: 
# rgl requires OpenGL; not run in check environments.
ggsegray(atlas = aseg()) |>
  add_glassbrain(opacity = 0.15) |>
  pan_camera("right lateral")

## End(Not run)

ggseg3d documentation built on April 22, 2026, 5:09 p.m.