Function applyTrackModToTrack

src/OpenLoco/src/Vehicles/Routing.cpp:1002–1161

0x004A5D94

    // 0x004A5D94
    static bool applyTrackModToTrack(const LocationOfInterest& interest, const uint8_t flags, RoutingResults* results, ModSection modSelection, uint8_t trackObjectId, uint8_t trackModObjectIds, 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 tad = interest.tad();
            auto& trackSize = World::TrackData::getUnkTrack(tad._data);
            reverseInterest.loc += trackSize.pos;
            if (trackSize.rotationEnd < 12)
            {
                reverseInterest.loc -= World::Pos3{ World::kRotationOffset[trackSize.rotationEnd], 0 };
            }
            reverseInterest.trackAndDirection ^= (1 << 2); // Reverse flag

            results->reachableLocs.tryAdd(reverseInterest);
        }

        auto* trackObj = ObjectManager::get<TrackObject>(trackObjectId);
        bool placementFailure = false;

        for (auto i = 0; i < 4; ++i)
        {
            if (!(trackModObjectIds & (1U << i)))
            {
                continue;
            }

            auto* trackModObj = ObjectManager::get<TrackExtraObject>(trackObj->mods[i]);

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

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

            for (auto& trackPiece : TrackData::getTrackPiece(tad.id()))