### - i -

- IConsoleLine() : IConsoleLine
- Include() : SmallVector< T, S >
- IncreaseDoCommandCosts() : AIObject
- Index() : CargoSpec
- IndustryNameSorter() : IndustryDirectoryWindow
- IndustryProductionSorter() : IndustryDirectoryWindow
- IndustryTransportedCargoSorter() : IndustryDirectoryWindow
- IndustryTypeSorter() : IndustryDirectoryWindow
- Info() : AILog
- IniFile() : IniFile
- IniGroup() : IniGroup
- IniItem() : IniItem
- Init() : CBlobBaseSimple , SettingEntry , SettingsPage
- InitEmpty() : CBlobBaseSimple
- InitialiseCrashLog() : CrashLog
- Initialize() : OrderList
- InitializeData() : Window
- InitializePositionSize() : Window
- InitializeViewport() : NWidgetViewport
- InitNested() : Window
- Insert() : SmallMap< T, U, S >
- InsertClosedNode() : CNodeList_HashTableT< Titem_, Thash_bits_open_, Thash_bits_closed_ >
- InsertConditionalOrder() : AIOrder
- InsertEvent() : AIEventController
- InsertOpenNode() : CNodeList_HashTableT< Titem_, Thash_bits_open_, Thash_bits_closed_ >
- InsertOrder() : AIOrder
- InsertOrderAt() : OrderList
- InvalidateAllFrom() : CargoPacket
- InvalidateCache() : CargoList< Tinst > , VehicleCargoList
- InvalidateData() : Window
- InvalidateDimensionCache() : NWidgetLeaf
- IsActionAvailable() : AITown
- IsAirportInformationAvailable() : AIAirport
- IsAirportTile() : AIAirport
- IsArticulated() : AIEngine , AIVehicle
- IsArticulatedPart() : RoadVehicle , Train
- IsAvailable() : AirportFTAClass
- IsAwarded() : AISubsidy , Subsidy
- IsBridgeTile() : AIBridge
- IsBuildable() : AITile
- IsBuildableRectangle() : AITile
- IsBuiltOnWater() : AIIndustry , AIIndustryType
- IsBuoyTile() : AIMarine
- IsBus() : RoadVehicle
- IsButton() : NWidgetToolbarContainer
- IsCanalTile() : AIMarine
- IsCargoAccepted() : AIIndustry
- IsCoastTile() : AITile
- IsCompleteTimetable() : OrderList
- IsConditionalOrder() : AIOrder
- IsCurrentOrderPartOfOrderList() : AIOrder
- IsDescSortOrder() : GUIList< T, F >
- IsDesertTile() : AITile
- IsDisabled() : NWidgetCore
- IsDisabledVehicleType() : AIGameSettings
- IsDockTile() : AIMarine
- IsDriveThroughRoadStationTile() : AIRoad
- IsDriveThroughRoadStopContinuation() : RoadStop
- IsEmpty() : AIAbstractList , CArrayT< Titem_, Tblock_size_, Tnum_blocks_ > , CBinaryHeapT< Titem_ > , CBlobBaseSimple , CFixedSizeArrayT< Titem_, Tcapacity_ > , SmallSet< Tdir, items > , NWidgetContainer
- IsEngine() : Train
- IsEntranceBusy() : RoadStop
- IsEventWaiting() : AIEventController
- IsExpected() : SpecializedStation< T, Tis_waypoint >
- IsFarmTile() : AITile
- IsFilterEnabled() : GUIList< T, F >
- IsFreeBay() : RoadStop
- IsFreeWagon() : Train
- IsFreight() : AICargo
- IsFrontEngine() : Train
- IsFull() : SmallSet< Tdir, items > , CArrayT< Titem_, Tblock_size_, Tnum_blocks_ > , CBinaryHeapT< Titem_ > , CFixedSizeArrayT< Titem_, Tcapacity_ >
- IsGotoDepotOrder() : AIOrder
- IsGotoStationOrder() : AIOrder
- IsGotoWaypointOrder() : AIOrder
- IsHalftileSlope() : AITile
- IsHangarTile() : AIAirport
- IsIn() : SmallSet< Tdir, items >
- IsInDepot() : AIVehicle
- IsInUse() : BaseStation
- IsLevelCrossingTile() : AIRail
- IsLockTile() : AIMarine
- IsLowered() : NWidgetCore
- IsMine() : AICompany
- IsMultiheaded() : Train
- IsNormalAircraft() : Aircraft
- IsNull() : CCountedPtr< Tcls_ >
- IsOpenTTDBaseGRF() : GRFConfig
- IsRailDepotTile() : AIRail
- IsRailStationTile() : AIRail
- IsRailTile() : AIRail
- IsRailTypeAvailable() : AIRail
- IsRailWaypointTile() : AIRail
- IsRawIndustry() : AIIndustryType , IndustrySpec
- IsRearDualheaded() : Train
- IsRoadDepotTile() : AIRoad
- IsRoadStationTile() : AIRoad
- IsRoadTile() : AIRoad
- IsRoadTypeAvailable() : AIRoad
- IsRoadVehFront() : RoadVehicle
- IsRockTile() : AITile
- IsRoughTile() : AITile
- IsShaded() : Window
- IsShared() : OrderList
- IsSnowTile() : AITile
- IsSortable() : GUIList< T, F >
- IsStationTile() : AITile
- IsSteepSlope() : AITile
- IsStoppedInDepot() : AIVehicle
- IsTunnelTile() : AITunnel
- IsValid() : CargoSpec , AIGameSettings
- IsValidAirportType() : AIAirport
- IsValidBaseStation() : AIBaseStation
- IsValidBridge() : AIBridge
- IsValidCargo() : AICargo
- IsValidConditionalOrder() : AIOrder
- IsValidEngine() : AIEngine
- IsValidGroup() : AIGroup
- IsValidID() : SpecializedStation< T, Tis_waypoint > , Pool< Titem, Tindex, Tgrowth_step, Tmax_size, Tcache, Tzero > , Pool< Titem, Tindex, Tgrowth_step, Tmax_size, Tcache, Tzero >::PoolItem< Tpool > , SpecializedVehicle< T, Type >
- IsValidIndustry() : AIIndustry
- IsValidIndustryType() : AIIndustryType
- IsValidSign() : AISign
- IsValidStation() : AIStation
- IsValidSubsidy() : AISubsidy
- IsValidTile() : AIMap
- IsValidTown() : AITown
- IsValidVehicle() : AIVehicle
- IsValidVehicleOrder() : AIOrder
- IsValidWaypoint() : AIWaypoint
- IsVehicleInSharedOrdersList() : OrderList
- IsVehicleServiceIntervalEnabled() : VehicleDetailsWindow
- IsVisible() : Scrollbar
- IsWagon() : AIEngine , Train
- IsWaterDepotTile() : AIMarine
- IsWaterTile() : AITile
- IsWidgetDisabled() : Window
- IsWidgetFocused() : Window
- IsWidgetGloballyFocused() : Window
- IsWidgetLowered() : Window
- IsWithinTownInfluence() : AITown , AITile , AIStation
- Items() : SmallSet< Tdir, items >