body-sweep

Clothes, shoes and hair as SWEEPS: a profile taken from the body and carried along a path, with curves along the way. This is the primitive under the tailor, the barber and the cobbler (see CHARACTER-DESIGN.md, step 11).

loftGarment is the LOFT: rings round the body's cross-section, carried along a chain of bones (a leg, an arm, the foot). Each ring is the convex HULL of the body's slice there, so it bridges hollows, plus thickness and an ease that may change along the sweep (a flared trouser leg, a puffed sleeve, a bucket top).

• The slice at a station takes only the skin of that station's BONE (its skin weights), so a ring round the shin never takes in the foot, and a ring round the thigh never the other leg. piece narrows it further: the body between its cuts.
• Where the chain bends (the ankle, the elbow), rings square to each bone would cross. The join is a MITRE: the ring at the joint lies in the plane halfway between the bones, and the rings either side are kept behind it, as in a pipe elbow. steps rounds the bend instead: that many rings turning gradually along a curve through the joint. 0 is the clean mitre, which is the default because it round-trips to a modelling tool cleanly.
• Each end is open (a free edge: it may stand off the body), sealed (it meets the body or the next piece: the ease fades to nothing there), or cap (closed, a toe).
• length carries the last ring on past the end of the chain (a hem below the ankle, a toe allowance).
• UVs come free: u is round the ring, v along the sweep, in metres.

The result is an ordinary garment binding (as garment-cut makes), each ring point bound to the skin it was sliced from, so it fits every body shape and bends with every clip.

Pure: a rigged body in, a binding out.