build_tract_meshes: Build mesh list for tract atlases

In ggseg3d: Interactive 3D Brain Atlas Visualization

Build mesh list for tract atlases

Description

Creates mesh data structures for tract atlases with per-vertex colouring. Supports palette colours (uniform per tract) or orientation-based RGB colours computed from centerline tangent vectors.

Usage

build_tract_meshes(
  atlas_data,
  na_colour,
  color_by = "colour",
  atlas_centerlines = NULL,
  text_by = NULL,
  label_by = "region"
)

Arguments

atlas_data	Prepared atlas data frame with label, colour, and mesh columns
na_colour	Colour for NA values
color_by	How to colour tracts: "colour" (use colour column), "orientation" (direction-based RGB from tangents)

Value

List of mesh data structures

ggseg3d documentation built on Feb. 21, 2026, 1:06 a.m.