Method UpdateTrackMotion

src/openrct2/ride/Vehicle.TrackMotion.cpp:1455–1605

* * rct2: 0x006DAB4C */

 *  rct2: 0x006DAB4C
 */
int32_t Vehicle::UpdateTrackMotion(int32_t* outStation)
{
    auto curRide = GetRide();
    if (curRide == nullptr)
        return 0;

    const auto* rideEntry = GetRideEntry();
    const auto* carEntry = Entry();

    if (carEntry == nullptr)
    {
        return 0;
    }

    if (carEntry->flags.has(CarEntryFlag::isMiniGolf))
    {
        return UpdateTrackMotionMiniGolf(outStation);
    }

    _vehicleF64E2C = 0;
    gCurrentVehicle = this;
    _vehicleMotionTrackFlags = 0;
    _vehicleStationIndex = StationIndex::GetNull();

    UpdateTrackMotionUpStopCheck();
    CheckAndApplyBlockSectionStopSite();
    UpdateVelocity();

    Vehicle* vehicle = this;
    if (_vehicleVelocityF64E08 < 0 && !vehicle->flags.has(VehicleFlag::moveSingleCar))
    {
        vehicle = vehicle->TrainTail();
    }
    // This will be the front vehicle even when traveling
    // backwards.
    _vehicleFrontVehicle = vehicle;

    auto spriteId = vehicle->id;
    while (!spriteId.IsNull())
    {
        Vehicle* car = getGameState().entities.GetEntity<Vehicle>(spriteId);
        if (car == nullptr)
        {
            break;
        }
        carEntry = car->Entry();
        if (carEntry != nullptr)
        {
            UpdateTrackMotionPreUpdate(*car, *curRide, *rideEntry, carEntry);
        }

        car->Sub6DBF3E();

        // Loc6DC0F7
        if (car->flags.has(VehicleFlag::onLiftHill))
        {
            _vehicleMotionTrackFlags |= VEHICLE_UPDATE_MOTION_TRACK_FLAG_VEHICLE_ON_LIFT_HILL;
        }