Method grow

src/OpenLoco/src/World/Town.cpp:1640–1779

* 0x00498116 * Grow * * @param this @ * @param growFlags @ */

     * @param growFlags @<eax>
     */
    void Town::grow(TownGrowFlags growFlags)
    {
        const auto oldUpatingCompany = GameCommands::getUpdatingCompanyId();
        GameCommands::setUpdatingCompanyId(CompanyId::neutral);

        const auto extent = findRoadExtent(*this);
        if (!extent.has_value())
        {
            if ((growFlags & TownGrowFlags::buildInitialRoad) != TownGrowFlags::none)
            {
                buildInitialRoad(*this);
            }
            GameCommands::setUpdatingCompanyId(oldUpatingCompany);
            return;
        }

        auto roadStart = extent->roadStart;
        Vehicles::TrackAndDirection::_RoadAndDirection tad(0, 0);
        tad._data = extent->tad;
        if (prng.randBool())
        {
            auto& roadSize = World::TrackData::getUnkRoad(tad._data);
            roadStart += roadSize.pos;
            if (roadSize.rotationEnd < 12)
            {
                roadStart -= World::Pos3{ kRotationOffset[roadSize.rotationEnd], 0 };
            }
            tad.setReversed(!tad.isReversed());
        }

        const auto idealRoadId = getIdealTownRoadId(*this);
        if (!idealRoadId.has_value())
        {
            GameCommands::setUpdatingCompanyId(oldUpatingCompany);
            return;
        }

        auto curRoadPos = roadStart;
        bool curOnBridge = extent->isBridge;

        for (auto i = 0U; i < 75; ++i)
        {
            auto res = TownManager::getClosestTownAndDensity(curRoadPos);
            if (!res.has_value() || res->first != id())
            {
                break;
            }
            const auto curRoadInfo = getRoadInformation(curRoadPos, tad);
            if (curRoadInfo.owner != CompanyId::neutral)
            {
                if ((growFlags & TownGrowFlags::neutralRoadTakeover) != TownGrowFlags::none)
                {
                    if (curOnBridge || hasNearbyBuildings(World::toTileSpace(curRoadPos)))
                    {
                        updateAndTakeoverRoad(curRoadPos, tad, curRoadInfo.roadObjId, CompanyId::neutral, curRoadInfo.streetLightStyle.value_or(0U));
                        break;
                    }
                }