Function getAvailableCompatibleMods

src/OpenLoco/src/Objects/ObjectUtils.cpp:276–351

0x004781C5, 0x004A693D

    // 0x004781C5, 0x004A693D
    std::array<uint8_t, kMaxMods> getAvailableCompatibleMods(uint8_t trackType, TransportMode transportMode, CompanyId companyId)
    {
        if (transportMode == TransportMode::road)
        {
            trackType &= ~(1 << 7);
        }

        std::array<uint8_t, 4> modList = { 0xFF, 0xFF, 0xFF, 0xFF };
        auto flags = 0;

        for (uint8_t vehicle = 0; vehicle < ObjectManager::getMaxObjects(ObjectType::vehicle); vehicle++)
        {
            auto vehicleObj = ObjectManager::get<VehicleObject>(vehicle);

            if (vehicleObj == nullptr)
            {
                continue;
            }

            if (vehicleObj->mode != transportMode)
            {
                continue;
            }

            if (trackType != vehicleObj->trackType)
            {
                continue;
            }

            auto company = CompanyManager::get(companyId);

            if (!company->isVehicleIndexUnlocked(vehicle))
            {
                continue;
            }

            for (auto i = 0; i < vehicleObj->numTrackExtras; i++)
            {
                flags |= 1ULL << vehicleObj->requiredTrackExtras[i];
            }

            if (!vehicleObj->hasFlags(VehicleObjectFlags::rackRail))
            {
                continue;
            }

            flags |= 1ULL << vehicleObj->rackRailType;
        }

        if (transportMode == TransportMode::road)
        {
            auto roadObj = ObjectManager::get<RoadObject>(trackType);

            for (auto i = 0; i < roadObj->numMods; i++)
            {
                if (flags & (1 << roadObj->mods[i]))
                {
                    modList[i] = roadObj->mods[i];