The operator caught it: the 5.3.65 image showed the mech hanging from its own
ground-shadow plate (-y is up in the bridge world). The follow-up pinned down
what was and wasn't wrong, and the reconstruction survives untouched.
Right, by three independent wire-level proofs: MAD.SKL offsets are a coherent
Y-up model (hip +5.29, knees descending, torso ascending -- anatomical only
read +Y-up); the BGF vertex extents agree (foot meshes extend -1.0 below their
ankle to the sole, torso +3.8 up to the missile pods); and the SHIPPED pod's
wire carries the same signs (hip +6.21, knees negative, vehicle root a pure
yaw with det +1). Our wire and shipped's are convention-identical -- no flip
exists between game and board in either game.
Wrong: the ad-hoc chase camera. It borrowed the aerial up-hint from the
calibrated live-bridge world (where -y is up) and applied it to a raw
scene-space render of Y-up wire data; the symmetric checkerboard ground
disguised the inversion. The shipped capture rendered upside-down through the
same harness, which is what cleared the wire.
Both conventions now documented in the roadmap: wire/scene space is Y-up in
both games; the live bridge presents -y-up via its calibrated mirror family
(FP_RIGHT_SIGN / CAGE_TWIST_SIGN, COCKPIT-CAGE-NOTES.md).
Tooling: pose_probe.py replaces the throwaway harness (updir=+1 scene space
default, -1 for the bridge sense). pose_chase_upfixed.png is the corrected
milestone image: the MadCat right side up -- chicken-walker legs, purple knee
actuators, feet planted, shadow under the feet.
Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
CydandClaude Fable 5
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