zwitschi/gig-line
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fix(vehicle): one chassis body, so the car sits on the road

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The vehicle floated 3.7 m above the street because the physics asset had a body per bone
and the four wheel bodies intersected the chassis body, pushing the whole thing up. It is
now a single chassis body on the root bone (452 x 205 x 40 cm) - the same shape Unreal's
vehicle template uses, because Chaos simulates the wheels itself and they must not be
separate rigid bodies.

Settle check, same spawn point:
  before: settled at Z 494 cm
  after:  settled at Z 119 cm

Added -drivetest, which holds full throttle for 3 s and reports speed and distance. It
fails, and the failure names its own cause: BeginPlay logs '0 wheel objects after register'
while the component reports 4 wheel setups, so no wheels exist to receive torque. Recorded
in TODO.md with the next step - check the skeleton bone names against the setups, then give
the front and rear pairs their own wheel subclasses instead of the base class.
This commit is contained in:
zwitschi committed 2026-11-09 15:19:56 +01:00
1 parent 4f3ed20e49
commit 5dd53ac30b
5 files changed
+86 -34
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