zwitschi d1636f6986 test(vehicle): it is a kinematic teleport, not a force - and that is why every force test was clean ...

Instrumented the movement component so the write is caught at its source rather than inferred from the
actor: a UGigLineVehicleMovement subclass is substituted for the stock component through
AWheeledVehiclePawn::VehicleMovementComponentName, and it logs CreateVehicle(), the first UpdateState and
the component tick.

  mover tick: Z 661  -> 1143 -> 1443 -> 1718 ..., output null, wheels 0
  physics OFF at 3 s: Z 2247, and it does not move for a whole second afterwards
  profile: t=0.25 Z=515 vZ=-8 | t=0.75 Z=920 vZ=-22 | t=1.25 Z=1287 vZ=173

Two conclusions:

1. The mesh's physics state IS what moves the actor - switching physics off freezes it at once.
2. It moves WITHOUT VELOCITY: position rises ~700 cm/s while vZ oscillates around zero. That is a
   kinematic teleport, not an impulse and not a force - which is exactly why gravity, mass and
   penetration all measured clean. The vehicle-state output is null throughout, so the teleport comes
   from the Chaos layer driving the body kinematically while the vehicle itself was never created.

Pawn parked, captures regenerated so the demo stays clean.

2026-11-09 21:51:52 +01:00

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