From 8e9914ae6e4fb53a89aaf6fc7fdbb929fa37e844 Mon Sep 17 00:00:00 2001 From: Zwitschi Date: Tue, 10 Nov 2026 18:35:52 +0100 Subject: [PATCH] docs(vehicle): record the axle flip did not fix the reverse direction Flipping the wheel-bone axles inward->outward and re-importing left the drive direction unchanged (-2788 vs -2680 cm/s). Reverted. The next probe is SetThrottleInput(-1) to split throttle-inverted from wheel-spin-inverted. --- MEMORY.md | 10 ++++++++++ 1 file changed, 10 insertions(+) diff --git a/MEMORY.md b/MEMORY.md index 69703ff..d202931 100644 --- a/MEMORY.md +++ b/MEMORY.md @@ -1038,3 +1038,13 @@ Historical task context from 2026-11-09/10; later vehicle findings above may sup build_physics_asset(skel, dest, "PA_Vehicle_Sedan")` from a commandlet; the delete+recreate fragility earlier was really this missing `PhysicsType`, not the box centre (both −18 and +32.4 had the same unsimulated body). + +## 2026-11-10 — Vehicle drives backwards; the axle flip did not fix it + +- The reverse direction is not the wheel-bone axle sign. Flipping the axles from inward to + outward (`y - copysign` → `y + copysign` in `vehicle_build.py`) and re-importing changed + nothing (`speed=-2788 cm/s` still, vs −2680 before). Reverted. +- Remaining suspects, in order: the Chaos wheel's spin axis convention (maybe it spins about + X, not the bone's Y), the engine torque sign, or the throttle sign. Next probe: run the + `-drivetest` with `SetThrottleInput(-1.0)` to split "throttle inverted" from "wheel spin + inverted" in one run.