Float Objects Around the Cabin

IVA cabin physics cuts small decorative subparts loose into a gatOS-owned physics world. They drift while coasting, slide under acceleration, and collide with the actual interior art.

Start the simulation

echo 1 > /sim/debug/iva/enabled
cat /sim/debug/iva/interior

Nothing is simulated while the master switch is off. That is the shipped default.

Adopt a prop

echo 'Gemini7 4 Sardine' > /sim/debug/iva/adopt_all
ls /sim/debug/iva
cat /sim/debug/iva/0/position
echo '0.3 0 0' > /sim/debug/iva/0/nudge

1. Enter the vessel’s IVA view.
2. Enable cabin physics.
3. Adopt one or a few small props.
4. Coast, thrust, or rotate and watch their inertial response.
5. Run echo 1 > /sim/debug/iva/clear to restore every object.
6. Write 0 to enabled to tear the simulation down.

Subparts only

adopt takes a subpart instance id, never a top-level vessel part. The size gate exists so a typo cannot cut a seat or hull panel loose.

Objects park under warp, in the VAB, and outside IVA unless run_outside_iva is enabled. The feature does not alter the save file because KSA does not persist these driven subpart transforms.

Validation status

The independent physics world and filesystem surface are code-complete. The full cabin flight checklist is pending.

IVA referenceObject discovery, limits, physics tuning, events, parking, cleanup, and errors.