subdivide.triangles: Subdivide all triangles of a mesh (one subdivision step).

In fsbrain: Managing and Visualizing Brain Surface Data

Subdivide all triangles of a mesh (one subdivision step).

Description

Splits every triangle into 4 by adding the edge midpoints, and projects the new vertices onto the sphere, i.e., the new vertices are scaled to unit length. This is the standard icosphere refinement, and it requires the input to be a sphere centered at the origin.

Usage

subdivide.triangles(vertices, faces)

Arguments

vertices	n x 3 numeric matrix, the vertex coordinates.
faces	m x 3 integer matrix, the triangle vertex indices (1-based).

Value

named list with entries 'vertices' and 'faces', the refined mesh.

fsbrain documentation built on Sept. 27, 2026, 1:07 a.m.