proxy-cover

What a garment does to the skin under it, as numbers: the half of human-proxy's coverBody that needs no engine, so an exporter (or another engine) hides the skin exactly as the builder does.

• Skin a garment LISTS (delete) is tucked in along its normal by tuck metres, and its triangles are dropped (glasses excepted: they list the lids under the lenses, which they do not cover).
• Skin a garment that WRAPS the body (BODY_WRAPPING_SLOTS) covers without listing it, found by geometry from the garment's drawn positions, is tucked just far enough to sit under it: 4 mm, more where it is loose, never more than 10 mm.
• Every tuck FADES IN over fade metres from the edge of the covered skin, so a cuff or a neckline shows no dip.

import { coverSkin } from 'tosijs-3d/proxy-cover'
const { positions, deleted } = coverSkin(untucked, normals, triangles, vertices, wearing, { drawn })