rigged-body-glb

Any rigged body out as a skinned GLB that plays UAL's clips by name. A body the rig tool made (an AI mesh, an artist's mesh, a scan), a file's own skin, or MakeHuman's: riggedBodyGlb(body) writes it in the same profile as Dramatis's character export, so three.js, Unity, Godot and Blender open it and a UAL clip binds to its bones with no retargeting. Pure: no engine, bytes out. tosijs-3d/rigged-body-glb.

import { glbRigTriangles } from 'tosijs-3d/glb-rig'
import { bodyFromMarkers } from 'tosijs-3d/rigged-body'
import { riggedBodyGlb } from 'tosijs-3d/rigged-body-glb'

const body = bodyFromMarkers(glbRigTriangles(bytes), { markers })
const glb = riggedBodyGlb(body, { restPose: 't-pose', naming: 'ue' })

What the file is (Dramatis's export-format, version 1):

• The skeleton: one skin, skeleton, over the profile's 65 joints in its order (UE mannequin names as UAL spells them: Head, _leaf tips), or Mixamo's names with naming: 'mixamo' (root keeps its name). Every joint's rest ROTATION is UAL's own frame (ual-rest), only its position is the body's: that is what makes UAL's rotation keys mean the same thing on it. A joint the body lacks is placed along UAL's bone, scaled to the body; one the profile lacks (a tail) follows after the 65, in its parent's frame.
• The rest pose: a T-pose by default (arms straight out, palms down, as UAL stands; VRM needs one), reached by turning each limb bone onto UAL's and skinning the mesh there once; the feet are turned back so they stay flat. restPose: 'source' keeps the body as it was rigged, UAL's frames turned along its bones.
• Root at the feet: the soles at y = 0 and the pelvis over the origin, metres, Y up, facing +Z. height scales the body to a height in metres first (a mesh generator's 1.9 units, say, made a real 1.7 m).
• Meshes: body, one primitive per material, and eyes (both eyeballs, skinned wholly to Head, which the profile prefers to parenting a mesh under a joint). The file's own materials go out as glTF PBR with their pictures embedded, when the body's surfaces carry them as data (a body read by glb-rig); otherwise a plain grey.
• Springs, when given the rig recipe: a bone spring (a tail) swings from its root down, a strand is baked into joints under its anchor and a tube skinned to them, colliders (auto: head, chest, clavicles, sized to the body) go on their bones. They are written as VRMC_springBone, which three-vrm, UniVRM and Godot's VRM importer read with no setup, and as TOSIJS_spring_chains, our own settings exactly (see spring-vrm for how the two models differ).
• asset.extras is passed through as given (Dramatis's licence block goes there), with generator and copyright.

Weights are the body's own, four per vertex, renormalised.