motion: the animation and physics cycle tested end to end on a real person (idle, walk, run, struck, down, up, walk), held to how a person moves #850

The owner, 2026-10-21, after watching the motion showcase and Siltreach's camp: "make sure the motion makes sense, these are humans, but they move like springs or robots, walking and running seem off, and is this going to integrate with animations in a smooth way like AAA do? we need that cycle correctly tested".

Why nothing catches it today

• Every ae3d human motion test, the plaza and the showcase run on the box man (tests/fixtures/gltf/humanoid.glb). Its Walk and Run are gaits made by tools/make_gltf_fixture.ae (locomotion: feet skate through turns (planted foot drifts 10-14% of the way, 0.2% straight) #611), not captured from a person.
• The get-up, kneel and sit are poses keyed in code (pose_planned, pose_stage), with timing chosen in code.
• The physical side is spring-driven: muscles at 20 Hz, damping 1.0, arms pinned at 30 Hz while holding.
• The tests bound pops, falls and standing up. None of them measures ringing, jerk or gait against a person, and none runs the whole cycle.

The cycle

idle, walk, run, struck (a light blow keeps it moving; a hard one puts it down), down, get up, idle, walk, run. Swept over stride moments and shove directions, not a few picked moments.

• On CI, on the box man: the handovers and the continuity of the drawn pose.
• Off CI, on a real person: Siltreach's people (Quaternius Walk, Run, Idle, HitRecieve, Flinch) and UAL2 (LayToIdle, Hit_Knockback), which have the same UE-mannequin bone names. Not committed: the repo ships importers, not assets (Real human figures and walks for the horde: an importer for Mixamo/CC0 characters into the pipeline #342).

What it is held to, per phase and per change

First targets, from Siltreach (git-a6, on e399f6a)

• motion: up from a seat it sat on from POWERED and handed back as a knock is, a settler falls about 1 s later (3 of 10 at Siltreach's breakfast) #848: a settler that sat from POWERED falls about 1 s after standing up (3 of 10 at breakfast).
• motion: up from a seat it sat on from ANIMATED, the drawn pelvis turns 17 to 63 rad/s on the first step on its clip #849: a settler that sat from ANIMATED shows a drawn pelvis turning 17 to 63 rad/s on the first step on its clip.

The fixes come after the numbers. The likely ones are captured gaits on the tested figure; the get-up handing into an authored clip with the bodies following it, as PuppetMaster recovers into the animator's get-up and GTA's NaturalMotion get-ups blend into authored animation; and damping whatever rings. Part of #790 and #509.