bounding_sphere: Compute the bounding sphere of a set of 3D vertices.

In fsbrain: Managing and Visualizing Brain Surface Data

Compute the bounding sphere of a set of 3D vertices.

Description

Computes the sphere that encloses the axis-aligned bounding box (AABB) of the given vertices, using the same convention as rgl's Sphere(AABB) auto-framing (see rgl src/geom.cpp) and scimesh's camera_auto(rgl_compat=TRUE): the center is the AABB center and the radius is half the length of the AABB diagonal.

Usage

bounding_sphere(vertices)

Arguments

vertices

an Nx3 numeric matrix of vertex coordinates, or a mesh3d/tmesh3d object, or an fs.surface, or a list of any of these (all vertices are pooled).

Value

a list with entries center (numeric vector of length 3) and radius (numeric scalar). For an empty/zero-extent input, radius is 0 and the center is the single vertex (or NA if no vertices).

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