Method autoLayoutTrain

src/OpenLoco/src/Vehicles/VehicleHead.cpp:545–730

0x004AF7A4

    // 0x004AF7A4
    void VehicleHead::autoLayoutTrain()
    {
        Vehicle train(*this);
        if (train.cars.empty())
        {
            return;
        }

        // This function has been modified from vanilla but it should
        // produce the same results. Vanilla version performed a lot
        // of flipping and inserting to reorder the cars. This version
        // does the final flipping/inserting in one go at the end.

        // Pretty safe to assume this as its hard to exceed 30
        // you can do about ~200 if you use some tricks
        assert(train.cars.size() < 100);

        sfl::static_vector<CarMetaData, 100> carData;

        for (auto& car : train.cars)
        {
            auto* vehicleObj = ObjectManager::get<VehicleObject>(car.front->objectId);
            CarMetaData data{};
            data.frontId = car.front->id;
            data.flags = vehicleObj->flags;
            data.power = vehicleObj->power;
            data.isReversed = car.body->has38Flags(Flags38::isReversed);
            data.wasReversed = car.body->has38Flags(Flags38::isReversed);
            carData.push_back(data);
        }
        auto pushCarToFront = [&carData](const size_t index) {
            std::rotate(carData.begin(), carData.begin() + index, carData.begin() + index + 1);
        };
        auto pushCarToBack = [&carData](const size_t index) {
            std::rotate(carData.begin() + index, carData.begin() + index + 1, carData.end());
        };

        if (!hasVehicleFlags(VehicleFlags::shuntCheat))
        {
            // Places first powered car at front of train

            for (auto i = 0U; i < carData.size(); ++i)
            {
                auto& cd = carData[i];
                if (cd.power != 0)
                {
                    pushCarToFront(i);
                    break;
                }
            }
        }

        {
            // Alternate forward/backward if VehicleObjectFlags::alternatingDirection set
            bool curIsReversed = false;
            for (auto& cd : carData)
            {
                if (cd.hasFlags(VehicleObjectFlags::alternatingDirection))