Measure Radius of Mesh About Point on Bone

Hullo everyone,

I have a feeling I’m missing the right key terms here and this is already existing functionality.
I’d like to measure the average and maximum radii of the portion of a mesh that is effect by some bone where the center of the circle is the bone.
The idea is to generate collision information using a table or with generated capsule collisions for efficient physics on a boned mesh to reduce self collision.

Does this already exist?
If not, what’s the code to get all of the vertices effected by a bone?