Chassis changelog

All notable changes to Chassis are documented in this file. The format is based on Keep a Changelog, and this project adheres to Semantic Versioning.

[1.3.0] - 2026-10-21

The drivable wheelchair moved into its own mod, Rollin. Install Rollin to keep riding and pushing wheelchairs.
A repaint at Marco’s replaces paint that a tuning mod gave the car.

Tuning API: RegisterTuningPart, InstallPart and RemovePart for parts with their own model and driving factors.
Built-in parts: engine, brakes and transmission stages 1-3, suspension 1-4, turbo, drift tyres.
SetPaint (primary, secondary, finish), SetRimColor, SetXenon, SetNeon, SetWindowTint, SetTyreSmoke and SetHorn. SetTuning and GetTuning store keys of your own mod.
The host checks each change against the owner, syncs it and saves it with the car. TuningStatsOf and TuningChanged read it.
PoseAsPusher, ReleasePusher and PushedBy let a player push a vehicle from behind, as Rollin’s wheelchair does.

The speedometer and rev counter in the vanilla cars move, dash lamps show indicators and headlights. SpeedUnit sets kmh or mph.
In first person, look at a dash switch and left-click it: lights, hazard lights, indicator stalk (also mouse wheel), horn. Switches click, indicators tick.
A dot in the screen centre shows where you look while your view is below the windscreen, with the switch’s name.
The vanilla cars flash their own amber indicator lamps outside, at the rear part of the brake light in red where a car has none.
Guns hit NPCs in cars. A driver who goes down falls out and the car stops.

ChassisApi.SetInterior builds your own interior; ChassisProfile.Gauges and ChassisProfile.Controls bind needles, lamps, digits and clickable switches.
ChassisApi.Telemetry, ReadGauge and RegisterGaugeSource: speed, rpm, pedals, lamps, steering, clock, odometer, trip, each with a validity flag.
RegisterControlAction, UseControl, ControlUsed and the events HeadlightsChanged, BrakeChanged, ReverseChanged, DriverChanged.
RegisterOccupantDown keeps a shot NPC slumped in its seat instead of falling out; RemoveOccupantDown removes it.
chassis telemetry and chassis zones work in the release build. The GitHub release also carries Chassis_1.2.0_debug.zip with the developer console commands.

The key hints at the bottom left show the vehicle’s keys: V First Person, G Horn, and the arrow keys for Indicators on vehicles with indicator lamps.
Behind a wheelchair the key hints show Push and Let Go, with your own key bindings.

NPCs in low cars like Sam’s and Michael’s Coupe drive off again instead of sitting still at the curb.

ChassisApi.AddKeyHint puts your own key into the key hints, a fixed key or one from your preferences. RemoveKeyHint takes it out.
The show callback gets a KeyHintContext with Vehicle, Profile, Seat, Driver and Pushing.

You sit visibly in the driver’s seat with both hands on the wheel, and the wheel turns as you steer. Co-op players see it too.
Press V in a vehicle to switch to first person.
G sounds the horn. The left and right arrow keys set the indicators on vehicles that have indicator lamps.
Vanilla cars get seats, a dashboard, a steering wheel and tinted glass. NPC drivers sit visibly, police included. BaseInterior turns both off.

ChassisApi.Register adds a vehicle profile from code; FitSeat builds a seat profile from the vanilla seat.
Honk, SetIndicator, SetLocked, SetOwner, SetPart and SetStorageEnd act on a LandVehicle and sync in co-op.
FirstPersonActive, FirstPersonChanged, IndicatorChanged and OwnersChanged report state to your mod.