Function removeTrackModToTrack

src/OpenLoco/src/Vehicles/Routing.cpp:1164–1298

0x004A6136

    // 0x004A6136
    static bool removeTrackModToTrack(const LocationOfInterest& interest, const uint8_t flags, RoutingResults* results, ModSection modSelection, uint8_t trackObjectId, uint8_t trackModObjectIds, currency32_t& totalCost, CompanyId companyId)
    {
        // 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);

        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()))
        {
            auto trackLoc = trackStart + World::Pos3{ Math::Vector::rotate(World::Pos2{ trackPiece.x, trackPiece.y }, tad.cardinalDirection()), 0 };
            trackLoc.z += trackPiece.z;

            auto tile = TileManager::get(trackLoc);
            World::TrackElement* elTrack = nullptr;
            for (auto& el : tile)
            {
                elTrack = el.as<World::TrackElement>();
                if (elTrack == nullptr)
                {
                    continue;
                }
                if (elTrack->baseHeight() != trackLoc.z)
                {
                    continue;
                }
                if (elTrack->rotation() != tad.cardinalDirection())
                {
                    continue;
                }