Here is a list of all documented functions, variables, defines, enums, and typedefs with links to the documentation:

### - r -

- RAIL_GROUND_BARREN : rail_map.h
- RAIL_GROUND_FENCE_HORIZ1 : rail_map.h
- RAIL_GROUND_FENCE_HORIZ2 : rail_map.h
- RAIL_GROUND_FENCE_NE : rail_map.h
- RAIL_GROUND_FENCE_NESW : rail_map.h
- RAIL_GROUND_FENCE_NW : rail_map.h
- RAIL_GROUND_FENCE_SE : rail_map.h
- RAIL_GROUND_FENCE_SENW : rail_map.h
- RAIL_GROUND_FENCE_SW : rail_map.h
- RAIL_GROUND_FENCE_VERT1 : rail_map.h
- RAIL_GROUND_FENCE_VERT2 : rail_map.h
- RAIL_GROUND_GRASS : rail_map.h
- RAIL_GROUND_HALF_SNOW : rail_map.h
- RAIL_GROUND_ICE_DESERT : rail_map.h
- RAIL_GROUND_WATER : rail_map.h
- RAIL_TILE_DEPOT : rail_map.h
- RAIL_TILE_NORMAL : rail_map.h
- RAIL_TILE_SIGNALS : rail_map.h
- RailBuildCost() : rail.h
- RailClearCost() : rail.h
- RailConvertCost() : rail.h
- RailFenceOffset : rail.h
- RailGroundType : rail_map.h
- RailMaintenanceCost() : rail.h
- RailNoLevelCrossings() : rail.h
- RailTileType : rail_map.h
- RailToolbar_CtrlChanged() : rail_gui.cpp
- RailToolbarWidgets : rail_widget.h
- RailTrackBridgeOffset : rail.h
- RailTrackOffset : rail.h
- RailType : rail_type.h
- RAILTYPE_BEGIN : rail_type.h
- RAILTYPE_ELECTRIC : rail_type.h
- RAILTYPE_END : rail_type.h
- RAILTYPE_MAGLEV : rail_type.h
- RAILTYPE_MONO : rail_type.h
- RAILTYPE_RAIL : rail_type.h
- RailTypeChangeInfo() : newgrf.cpp
- RailTypeFlags : rail.h
- RailTypeLabelList : rail.h
- RailTypes : rail_type.h
- RAILTYPES_ELECTRIC : rail_type.h
- RAILTYPES_MAGLEV : rail_type.h
- RAILTYPES_MONO : rail_type.h
- RAILTYPES_NONE : rail_type.h
- RAILTYPES_RAIL : rail_type.h
- RailTypeSpriteGroup : rail.h
- RAILVEH_MULTIHEAD : engine_type.h
- RAILVEH_SINGLEHEAD : engine_type.h
- RAILVEH_WAGON : engine_type.h
- RailVehicleChangeInfo() : newgrf.cpp
- RailVehicleTypes : engine_type.h
- RandomCompanyManagerFaceBits() : company_manager_face.h
- RandomDiagDir() : town_cmd.cpp
- RandomHeight() : tgp.cpp
- RandomTile : map_func.h
- RandomTileSeed() : map_func.h
- RateConversion() : mixer.cpp
- RATING_GROWTH_MAXIMUM : town_type.h
- RATING_GROWTH_UP_STEP : town_type.h
- RATING_INITIAL : town_type.h
- RATING_OUTSTANDING : town_type.h
- RATING_ROAD_DOWN_STEP_EDGE : town_type.h
- RATING_ROAD_DOWN_STEP_INNER : town_type.h
- RATING_ROAD_MINIMUM : town_type.h
- RATING_ROAD_NEEDED_HOSTILE : town_type.h
- RATING_ROAD_NEEDED_NEUTRAL : town_type.h
- RATING_ROAD_NEEDED_PERMISSIVE : town_type.h
- RATING_STATION_DOWN_STEP : town_type.h
- RATING_STATION_UP_STEP : town_type.h
- RATING_TUNNEL_BRIDGE_DOWN_STEP : town_type.h
- RATING_TUNNEL_BRIDGE_MINIMUM : town_type.h
- RATING_TUNNEL_BRIDGE_NEEDED_HOSTILE : town_type.h
- RATING_TUNNEL_BRIDGE_NEEDED_NEUTRAL : town_type.h
- RATING_TUNNEL_BRIDGE_NEEDED_PERMISSIVE : town_type.h
- Ratings : town_type.h
- RDE_NEXT_TILE : roadveh.h
- RDE_TURNED : roadveh.h
- ReadByte() : oldloader.cpp , oldloader.h
- ReadByteFromFile() : oldloader.cpp
- ReadFileToMem() : fileio.cpp , fileio_func.h
- ReadGRFSpriteOffsets() : spritecache.cpp , spritecache.h
- ReadHeightMap() : heightmap.cpp
- ReadHeightmapBMP() : heightmap.cpp
- ReadHeightmapBMPImageData() : heightmap.cpp
- ReadHeightmapPNG() : heightmap.cpp
- ReadHeightmapPNGImageData() : heightmap.cpp
- ReadLanguagePack() : language.h , strings.cpp
- ReadRawLanguageStrings() : game_text.cpp
- ReadRecolourSprite() : spritecache.cpp
- ReadSprite() : spritecache.cpp
- ReadSpriteLayout() : newgrf.cpp
- ReadSpriteLayoutRegisters() : newgrf.cpp
- ReadSpriteLayoutSprite() : newgrf.cpp
- ReadValue() : saveload.cpp , saveload.h
- ReadyForNextItem() : news_gui.cpp
- ReallocError() : alloc_func.cpp , alloc_func.hpp
- ReallocT() : alloc_func.hpp
- ReallyClearObjectTile() : object_cmd.cpp
- ReallyDoDrawString() : gfx.cpp
- RebuildSubsidisedSourceAndDestinationCache() : subsidy.cpp , subsidy_func.h
- RebuildTownCaches() : town_sl.cpp
- RECOLOUR_BIT : sprites.h
- RecomputePrices() : economy.cpp , economy_func.h
- ReconsiderGameScriptLanguage() : game_text.cpp , game_text.hpp
- RedrawSmallmap() : settings.cpp
- RedrawTownAuthority() : settings.cpp
- REF_CARGO_PACKET : saveload.h
- REF_ENGINE_RENEWS : saveload.h
- REF_LINK_GRAPH : saveload.h
- REF_LINK_GRAPH_JOB : saveload.h
- REF_ORDER : saveload.h
- REF_ORDERLIST : saveload.h
- REF_ROADSTOPS : saveload.h
- REF_STATION : saveload.h
- REF_STORAGE : saveload.h
- REF_TOWN : saveload.h
- REF_VEHICLE : saveload.h
- REF_VEHICLE_OLD : saveload.h
- ReferenceToInt() : saveload.cpp
- RefitVehicle() : vehicle_cmd.cpp
- REFRESH_GAMEINFO_X_REQUERIES : network_gamelist.cpp
- RegisterGameTranslation() : game_text.cpp , game_text.hpp
- ReInitAllWindows() : window.cpp , window_func.h
- ReinitGuiAfterToggleElrail() : rail_gui.cpp , rail_gui.h
- ReleaseDisastersTargetingIndustry() : disaster_cmd.cpp , industry.h
- ReleaseDisastersTargetingVehicle() : disaster_cmd.cpp , vehicle_func.h
- ReloadNewGRFData() : newgrf.h , afterload.cpp
- RelocateAllWindows() : window.cpp , window_gui.h
- RemapCoords() : landscape.h
- RemapCoords2() : landscape.h
- RemapNewGRFStringControlCode() : newgrf_text.cpp , newgrf_text.h
- RemapOldStringID() : saveload_internal.h , strings_sl.cpp
- RemapTTOColour() : oldloader_sl.cpp
- RemoveAirport() : station_cmd.cpp
- RemoveAllEngineReplacement() : autoreplace.cpp , autoreplace_func.h
- RemoveAllEngineReplacementForCompany() : autoreplace_func.h
- RemoveBuoy() : waypoint_cmd.cpp , waypoint_func.h
- RemoveDock() : station_cmd.cpp
- RemoveDuplicatesFromGRFConfigList() : newgrf_config.cpp
- RemoveEngineReplacement() : autoreplace.cpp , autoreplace_func.h
- RemoveEngineReplacementForCompany() : autoreplace_func.h
- RemoveFirstTrack() : track_func.h
- RemoveFirstTrackdir() : track_func.h
- RemoveFromConsist() : train_cmd.cpp
- RemoveFromRailBaseStation() : station_cmd.cpp
- RemoveHalftileSlope() : slope_func.h
- RemoveLock() : water_cmd.cpp
- RemoveOrderFromAllVehicles() : order_cmd.cpp , order_func.h
- RemoveRailStation() : station_cmd.cpp
- RemoveRailWaypoint() : station_cmd.cpp
- RemoveRoad() : road_cmd.cpp
- RemoveRoadStop() : station_cmd.cpp
- RemoveUnderscores() : console.cpp , console_internal.h
- RemoveVehicleFromGroup() : group.h , group_cmd.cpp
- RemoveWindowFromZOrdering() : window.cpp
- RenameSign() : signs_gui.cpp
- ReplaceChain() : autoreplace_cmd.cpp
- ReplaceEnglishWords() : townname.cpp
- ReplaceFreeUnit() : autoreplace_cmd.cpp
- ReplaceVehicleWidgets : autoreplace_widget.h
- ReplaceWords() : townname.cpp
- ReportNewsProductionChangeIndustry() : industry_cmd.cpp
- REQUERY_EVERY_X_GAMELOOPS : network_gamelist.cpp
- ReserveConsist() : economy.cpp
- ResetBridges() : bridge.h , tunnelbridge_cmd.cpp
- ResetCompanyLivery() : company_cmd.cpp , livery.h
- ResetCurrencies() : currency.cpp , currency.h
- ResetCustomAirports() : newgrf.cpp
- ResetCustomHouses() : newgrf.cpp
- ResetCustomIndustries() : newgrf.cpp
- ResetCustomObjects() : newgrf.cpp
- ResetCustomStations() : newgrf.cpp
- ResetFontSizes() : fontcache.cpp
- ResetGenericCallbacks() : newgrf_generic.cpp , newgrf_generic.h
- ResetGlyphCache() : fontcache.cpp
- ResetGRFConfig() : newgrf_config.h , newgrf_config.cpp
- ResetHouseAge() : town_map.h
- ResetIndustries() : industry_cmd.cpp , industrytype.h
- ResetIndustryConstructionStage() : industry_map.h
- ResetLandscapeConfirmationCallback() : terraform_gui.cpp
- ResetNewGRF() : newgrf.cpp
- ResetNewGRFData() : newgrf.h , newgrf.cpp
- ResetNewGRFErrors() : newgrf.cpp
- ResetObjects() : newgrf_object.cpp , newgrf_object.h
- ResetOldNames() : saveload_internal.h , strings_sl.cpp
- ResetPersistentNewGRFData() : newgrf.cpp , newgrf.h
- ResetPriceBaseMultipliers() : economy.cpp , economy_func.h
- ResetRailTypes() : rail.h , rail_cmd.cpp
- ResetRestoreAllTransparency() : transparency.h
- ResetSets() : signal.cpp
- ResetSignalHandlers() : afterload.cpp
- ResetSignalVariant() : rail_gui.h , rail_gui.cpp
- ResetWindowSystem() : window.cpp , window_func.h
- ResizeWindow() : window_func.h , window.cpp
- ResolveLoopProc() : address.cpp
- RestoreRandomSeeds() : random_func.hpp
- RestoreTextRefStackBackup() : newgrf_text.h , newgrf_text.cpp
- RestoreTrainBackup() : train_cmd.cpp
- RestrictionMode : settings_gui.cpp
- return_cmd_error : command_func.h
- return_dcpi : command.cpp
- return_error : tcp_http.cpp
- ReverseDiagDir() : direction_func.h
- ReverseDir() : direction_func.h
- ReverseTrackdir() : track_func.h
- ReverseTrainDirection() : vehicle_sl.cpp , train_cmd.cpp
- ReverseTrainSwapVeh() : train_cmd.cpp , vehicle_sl.cpp
- RGBToGrayscale() : heightmap.cpp
- River_Hash() : landscape.cpp
- RIVER_HASH_SIZE : landscape.cpp
- RiverModifyDesertZone() : water_cmd.cpp , water.h
- RM_ADVANCED : settings_gui.cpp
- RM_ALL : settings_gui.cpp
- RM_BASIC : settings_gui.cpp
- RM_CHANGED_AGAINST_DEFAULT : settings_gui.cpp
- RM_CHANGED_AGAINST_NEW : settings_gui.cpp
- RM_END : settings_gui.cpp
- ROAD_ALL : road_type.h
- ROAD_E : road_type.h
- ROAD_END : road_type.h
- ROAD_N : road_type.h
- ROAD_NE : road_type.h
- ROAD_NONE : road_type.h
- ROAD_NW : road_type.h
- ROAD_REMOVE : town.h
- ROAD_S : road_type.h
- ROAD_SE : road_type.h
- ROAD_SW : road_type.h
- ROAD_TILE_CROSSING : road_map.h
- ROAD_TILE_DEPOT : road_map.h
- ROAD_TILE_NORMAL : road_map.h
- ROAD_W : road_type.h
- ROAD_X : road_type.h
- ROAD_Y : road_type.h
- RoadBits : road_type.h
- RoadFindPathToDest() : roadveh_cmd.cpp
- RoadFlags : road_gui.cpp
- RoadMaintenanceCost() : road_func.h
- Roadside : road_map.h
- ROADSIDE_BARREN : road_map.h
- ROADSIDE_GRASS : road_map.h
- ROADSIDE_GRASS_ROAD_WORKS : road_map.h
- ROADSIDE_PAVED : road_map.h
- ROADSIDE_PAVED_ROAD_WORKS : road_map.h
- ROADSIDE_STREET_LIGHTS : road_map.h
- ROADSIDE_TREES : road_map.h
- ROADSTOP_BUS : station_type.h
- ROADSTOP_TRUCK : station_type.h
- RoadStopType : station_type.h
- RoadTileType : road_map.h
- RoadToolbar_CtrlChanged() : road_gui.cpp
- RoadToolbarWidgets : road_widget.h
- RoadType : road_type.h
- ROADTYPE_BEGIN : road_type.h
- ROADTYPE_END : road_type.h
- ROADTYPE_ROAD : road_type.h
- ROADTYPE_TRAM : road_type.h
- RoadTypes : road_type.h
- ROADTYPES_ALL : road_type.h
- ROADTYPES_END : road_type.h
- ROADTYPES_NONE : road_type.h
- ROADTYPES_ROAD : road_type.h
- ROADTYPES_TRAM : road_type.h
- RoadTypeToRoadTypes() : road_func.h
- RoadVehAccelerationModelChanged() : settings.cpp
- RoadVehArrivesAt() : roadveh_cmd.cpp
- RoadVehEngineCapacitySorter() : build_vehicle_gui.cpp
- RoadVehicleChangeInfo() : newgrf.cpp
- RoadVehiclesAreBuilt() : road_cmd.cpp
- RoadVehicleStates : roadveh.h
- RoadVehIsCrashed() : roadveh_cmd.cpp
- RoadVehSlopeSteepnessChanged() : settings.cpp
- RoadVehUpdateCache() : roadveh_cmd.cpp , roadveh.h
- ROL() : bitmath_func.hpp
- ROR() : bitmath_func.hpp
- RotateAirportMovingData() : airport.h , airport.cpp
- RotateRight() : newgrf_spritegroup.cpp
- RotateRoadBits() : road_func.h
- ROTOR_Z_OFFSET : aircraft_cmd.cpp
- RoundDivSU() : math_func.hpp
- ROV : engines.h
- RTBO_SLOPE : rail.h
- RTBO_X : rail.h
- RTBO_Y : rail.h
- RTF_CATENARY : rail.h
- RTF_NO_LEVEL_CROSSING : rail.h
- RTFB_CATENARY : rail.h
- RTFB_NO_LEVEL_CROSSING : rail.h
- RTFB_NONE : rail.h
- RTO_CROSSING_XY : rail.h
- RTO_E : rail.h
- RTO_JUNCTION_NE : rail.h
- RTO_JUNCTION_NSEW : rail.h
- RTO_JUNCTION_NW : rail.h
- RTO_JUNCTION_SE : rail.h
- RTO_JUNCTION_SW : rail.h
- RTO_N : rail.h
- RTO_S : rail.h
- RTO_SLOPE_NE : rail.h
- RTO_SLOPE_NW : rail.h
- RTO_SLOPE_SE : rail.h
- RTO_SLOPE_SW : rail.h
- RTO_W : rail.h
- RTO_X : rail.h
- RTO_Y : rail.h
- RTSG_BRIDGE : rail.h
- RTSG_CROSSING : rail.h
- RTSG_CURSORS : rail.h
- RTSG_DEPOT : rail.h
- RTSG_FENCES : rail.h
- RTSG_GROUND : rail.h
- RTSG_OVERLAY : rail.h
- RTSG_PYLONS : rail.h
- RTSG_SIGNALS : rail.h
- RTSG_TUNNEL : rail.h
- RTSG_TUNNEL_PORTAL : rail.h
- RTSG_WIRES : rail.h
- RunTileLoop() : landscape.h , landscape.cpp
- RunVehicleDayProc() : vehicle.cpp
- RUNWAY_OUT2_block : airport.h
- RV_OVERTAKE_TIMEOUT : roadveh.h
- RVI : engines.h
- RVList : roadstop.cpp
- RVS_DRIVE_SIDE : roadveh.h
- RVS_ENTERED_STOP : roadveh.h
- RVS_IN_DT_ROAD_STOP : roadveh.h
- RVS_IN_ROAD_STOP : roadveh.h
- RVS_USING_SECOND_BAY : roadveh.h
- RVSB_DRIVE_SIDE : roadveh.h
- RVSB_IN_DEPOT : roadveh.h
- RVSB_IN_DT_ROAD_STOP : roadveh.h
- RVSB_IN_ROAD_STOP : roadveh.h
- RVSB_ROAD_STOP_TRACKDIR_MASK : roadveh.h
- RVSB_TRACKDIR_MASK : roadveh.h
- RVSB_WORMHOLE : roadveh.h