Function applyRoadModToRoad

src/OpenLoco/src/Vehicles/Routing.cpp:1344–1503

0x0047A5E6

    // 0x0047A5E6
    static bool applyRoadModToRoad(const LocationOfInterest& interest, const uint8_t flags, RoutingResults* results, ModSection modSelection, uint8_t roadObjectId, uint8_t roadModObjectIds, currency32_t& totalCost, CompanyId companyId, bool& hasFailedAllPlacement)
    {
        // If not in single segment mode then we should add the reverse
        // direction of track to the results to prevent it being visited.
        // This is because track mods do not have directions so applying
        // to the reverse would do nothing (or worse double spend)
        if (results != nullptr)
        {
            LocationOfInterest reverseInterest = interest;
            reverseInterest.loc = interest.loc;
            const auto rad = interest.rad();
            auto& roadSize = World::TrackData::getUnkRoad(rad._data);
            reverseInterest.loc += roadSize.pos;
            if (roadSize.rotationEnd < 12)
            {
                reverseInterest.loc -= World::Pos3{ World::kRotationOffset[roadSize.rotationEnd], 0 };
            }
            reverseInterest.trackAndDirection ^= (1 << 2); // Reverse flag

            results->reachableLocs.tryAdd(reverseInterest);
        }

        auto* roadObj = ObjectManager::get<RoadObject>(roadObjectId);
        bool placementFailure = false;

        for (auto i = 0; i < 2; ++i)
        {
            if (!(roadModObjectIds & (1U << i)))
            {
                continue;
            }

            auto* roadModObj = ObjectManager::get<RoadExtraObject>(roadObj->mods[i]);

            const auto pieceFlags = TrackData::getRoadMiscData(interest.rad().id()).compatibleFlags;
            if ((roadModObj->roadPieces & pieceFlags) != pieceFlags)
            {
                //_1135F64 |= (1 << 0); placement failed at least once
                placementFailure = true;
                break;
            }
        }

        if (!placementFailure)
        {
            auto roadStart = interest.loc;
            const auto rad = interest.rad();
            if (rad.isReversed())
            {
                auto& roadSize = World::TrackData::getUnkRoad(rad._data);
                roadStart += roadSize.pos;
                if (roadSize.rotationEnd < 12)
                {
                    roadStart -= World::Pos3{ World::kRotationOffset[roadSize.rotationEnd], 0 };
                }
            }

            for (auto& roadPiece : TrackData::getRoadPiece(rad.id()))