Function clearTrack

src/OpenLoco/src/GameCommands/Road/CreateRoad.cpp:86–150

0x00476EC4

    // 0x00476EC4
    static RoadClearFunctionResult clearTrack(World::TrackElement& elTrack, const ClearFunctionArgs& args)
    {
        if (elTrack.hasBridge())
        {
            getLegacyReturnState().byte_1136075 = elTrack.bridge();
            auto* bridgeObj = ObjectManager::get<BridgeObject>(elTrack.bridge());
            if ((bridgeObj->disabledTrackCfg & CommonTraitFlags::junction) != CommonTraitFlags::none)
            {
                setErrorText(StringIds::bridge_not_suitable_for_junction);
                return RoadClearFunctionResult(World::TileClearance::ClearFuncResult::collisionErrorSet);
            }
        }

        auto* trackObj = ObjectManager::get<TrackObject>(elTrack.trackObjectId());
        auto* roadObj = ObjectManager::get<RoadObject>(args.roadObjectId);

        if (!(trackObj->compatibleRoads & (1U << args.roadObjectId))
            && !(roadObj->compatibleTracks & (1U << elTrack.trackObjectId())))
        {
            FormatArguments::common(trackObj->name);
            setErrorText(StringIds::unable_to_cross_or_create_junction_with_string);
            return RoadClearFunctionResult(World::TileClearance::ClearFuncResult::collisionErrorSet);
        }

        if (elTrack.hasSignal())
        {
            setErrorText(StringIds::signal_in_the_way);
            return RoadClearFunctionResult(World::TileClearance::ClearFuncResult::collisionErrorSet);
        }

        if (elTrack.hasStationElement())
        {
            setErrorText(StringIds::station_in_the_way);
            return RoadClearFunctionResult(World::TileClearance::ClearFuncResult::collisionErrorSet);
        }

        if (elTrack.hasBridge())
        {
            if (elTrack.bridge() != args.bridgeId)
            {
                setErrorText(StringIds::bridge_types_must_match);
                return RoadClearFunctionResult(World::TileClearance::ClearFuncResult::collisionErrorSet);
            }
        }

        if (elTrack.trackId() != 0
            || args.roadId != 0
            || !((elTrack.rotation() - args.rotation) & 0b1)
            || elTrack.baseHeight() != args.pos.z)
        {
            setErrorText(StringIds::level_crossing_only_possible_with_straight_road_and_track_at_same_level);
            return RoadClearFunctionResult(World::TileClearance::ClearFuncResult::collisionErrorSet);
        }

        auto res = RoadClearFunctionResult(World::TileClearance::ClearFuncResult::noCollision);
        res.hasLevelCrossing = true;
        getLegacyReturnState().flags_1136073 |= (1U << 2);