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

### - t -

- TarListAddFile() : fileio.cpp
- TerraformAddDirtyTile() : terraform_cmd.cpp
- TerraformAddDirtyTileAround() : terraform_cmd.cpp
- TerraformGetHeightOfTile() : terraform_cmd.cpp
- TerraformSetHeightOfTile() : terraform_cmd.cpp
- TerraformTileHeight() : terraform_cmd.cpp
- TerraformTileProc : tile_cmd.h
- TestAutoslopeOnRailTile() : rail_cmd.cpp
- TestTileOnSearchProc : map_func.h
- TextColour : gfx_type.h
- TgenSetTileHeight() : tgp.cpp
- ThreadMsg : openttd.h
- TicksToLeaveDepot() : rail.h , rail_cmd.cpp
- TILE_ADD : map_func.h
- TILE_ADDXY : map_func.h
- TILE_ASSERT : map_func.h
- TILE_HEIGHT : tile_type.h
- TILE_MASK : map_func.h
- TILE_PIXELS : tile_type.h
- TILE_SIZE : tile_type.h
- TileAddByDiagDir() : map_func.h
- TileAddWrap() : map.cpp , map_func.h
- TileDiffXY() : map_func.h
- TileHeight() : tile_map.h
- TileIndex : tile_type.h
- TileIndexDiff : map_func.h , map_type.h
- TileIndexDiffCByDiagDir() : map_func.h
- TileIndexDiffCByDir() : map_func.h
- TileIndexToTileIndexDiffC() : map_func.h
- TileLoop_Town() : town_cmd.cpp
- TileLoop_Water() : water.h , water_cmd.cpp
- TileOffsByDiagDir() : map_func.h
- TileOffsByDir() : map_func.h
- TilePixelHeight() : tile_map.h
- TileSource : elrail_data.h
- TileStr() : dbg_helpers.cpp
- TileType : tile_type.h
- TileX() : map_func.h
- TileXY() : map_func.h
- TileY() : map_func.h
- TIME_BETWEEN_DOUBLE_CLICK : window.cpp
- TL_2X2_GRID : town_type.h
- TL_3X3_GRID : town_type.h
- TL_BETTER_ROADS : town_type.h
- TL_NO_ROADS : town_type.h
- TL_ORIGINAL : town_type.h
- TLG : elrail_data.h
- TO_BRIDGES : transparency.h
- TO_BUILDINGS : transparency.h
- TO_CATENARY : transparency.h
- TO_HOUSES : transparency.h
- TO_INDUSTRIES : transparency.h
- TO_LOADING : transparency.h
- TO_SIGNS : transparency.h
- TO_STRUCTURES : transparency.h
- TO_TREES : transparency.h
- ToggleBit() : bitmath_func.hpp
- ToggleRailButton_Remove() : rail_gui.cpp
- ToggleRoadButton_Remove() : road_gui.cpp
- ToggleTransparency() : transparency.h
- ToggleTransparencyLock() : transparency.h
- ToTileIndexDiff() : map_func.h
- TOWN_GROWTH_FREQUENCY : town.h
- TOWN_HAS_CHURCH : town.h
- TOWN_HAS_STADIUM : town.h
- TOWN_HOUSE_COMPLETED : town.h
- TOWN_IS_FUNDED : town.h
- TownActionBuildStatue() : town_cmd.cpp
- TownAuthorityWndProc() : town_gui.cpp
- TownGetVariable() : newgrf_town.cpp , newgrf_town.h
- TownHouseChangeInfo() : newgrf.cpp
- TownLayout : town_type.h
- TownLayoutAllows2x2HouseHere() : town_cmd.cpp
- TownLayoutAllowsHouseHere() : town_cmd.cpp
- TP_IMPROVED : tree_cmd.cpp
- TP_NONE : tree_cmd.cpp
- TP_ORIGINAL : tree_cmd.cpp
- Track : track_type.h
- TRACK_BEGIN : track_type.h
- TRACK_BIT_3WAY_NE : track_type.h
- TRACK_BIT_3WAY_NW : track_type.h
- TRACK_BIT_3WAY_SE : track_type.h
- TRACK_BIT_3WAY_SW : track_type.h
- TRACK_BIT_ALL : track_type.h
- TRACK_BIT_CROSS : track_type.h
- TRACK_BIT_DEPOT : track_type.h
- TRACK_BIT_HORZ : track_type.h
- TRACK_BIT_LEFT : track_type.h
- TRACK_BIT_LOWER : track_type.h
- TRACK_BIT_MASK : track_type.h
- TRACK_BIT_NONE : track_type.h
- TRACK_BIT_RIGHT : track_type.h
- TRACK_BIT_UPPER : track_type.h
- TRACK_BIT_VERT : track_type.h
- TRACK_BIT_WORMHOLE : track_type.h
- TRACK_BIT_X : track_type.h
- TRACK_BIT_Y : track_type.h
- TRACK_END : track_type.h
- TRACK_LEFT : track_type.h
- TRACK_LOWER : track_type.h
- TRACK_RIGHT : track_type.h
- TRACK_UPPER : track_type.h
- TRACK_X : track_type.h
- TRACK_Y : track_type.h
- TrackBits : track_type.h
- TrackBitsToTrack() : track_func.h
- TrackBitsToTrackdirBits() : track_func.h
- TrackCrossesTracks() : track_func.h
- Trackdir : track_type.h
- TRACKDIR_BEGIN : track_type.h
- TRACKDIR_BIT_LEFT_N : track_type.h
- TRACKDIR_BIT_LEFT_S : track_type.h
- TRACKDIR_BIT_LOWER_E : track_type.h
- TRACKDIR_BIT_LOWER_W : track_type.h
- TRACKDIR_BIT_MASK : track_type.h
- TRACKDIR_BIT_NONE : track_type.h
- TRACKDIR_BIT_RIGHT_N : track_type.h
- TRACKDIR_BIT_RIGHT_S : track_type.h
- TRACKDIR_BIT_UPPER_E : track_type.h
- TRACKDIR_BIT_UPPER_W : track_type.h
- TRACKDIR_BIT_X_NE : track_type.h
- TRACKDIR_BIT_X_SW : track_type.h
- TRACKDIR_BIT_Y_NW : track_type.h
- TRACKDIR_BIT_Y_SE : track_type.h
- TRACKDIR_END : track_type.h
- TRACKDIR_LEFT_N : track_type.h
- TRACKDIR_LEFT_S : track_type.h
- TRACKDIR_LOWER_E : track_type.h
- TRACKDIR_LOWER_W : track_type.h
- trackdir_names : dbg_helpers.cpp
- TRACKDIR_RIGHT_N : track_type.h
- TRACKDIR_RIGHT_S : track_type.h
- TRACKDIR_RVREV_NE : track_type.h
- TRACKDIR_RVREV_NW : track_type.h
- TRACKDIR_RVREV_SE : track_type.h
- TRACKDIR_RVREV_SW : track_type.h
- TRACKDIR_UPPER_E : track_type.h
- TRACKDIR_UPPER_W : track_type.h
- TRACKDIR_X_NE : track_type.h
- TRACKDIR_X_SW : track_type.h
- TRACKDIR_Y_NW : track_type.h
- TRACKDIR_Y_SE : track_type.h
- TrackdirBits : track_type.h
- TrackdirBitsToTrackBits() : track_func.h
- TrackdirCrossesTrackdirs() : track_func.h
- TrackDirectionToTrackdir() : track_func.h
- TrackdirReachesTrackdirs() : track_func.h
- TrackdirToExitdir() : track_func.h
- TrackdirToTrack() : track_func.h
- TrackdirToTrackdirBits() : track_func.h
- TrackEnterdirToTrackdir() : track_func.h
- TrackExitdirToTrackdir() : track_func.h
- TracksOverlap() : track_func.h
- TrackStatusToRedSignals() : track_func.h
- TrackStatusToTrackBits() : track_func.h
- TrackStatusToTrackdirBits() : track_func.h
- TrackToTrackBits() : track_func.h
- TrackToTrackdir() : track_func.h
- TrackToTrackdirBits() : track_func.h
- TrainApproachingCrossing() : train_cmd.cpp
- TrainApproachingCrossingEnum() : train_cmd.cpp
- TrainApproachingCrossingTile() : train_cmd.cpp
- TrainApproachingLineEnd() : train_cmd.cpp
- TrainCanLeaveTile() : train_cmd.cpp
- TrainCargoChanged() : train_cmd.cpp
- TrainCheckIfLineEnds() : train_cmd.cpp
- TrainConsistChanged() : train_cmd.cpp
- TrainExitDir() : train_cmd.cpp
- TrainOnTileEnum() : train_cmd.cpp , signal.cpp
- TrainPowerChanged() : train_cmd.cpp
- TrainSubtype : train.h
- TransparencyOption : transparency.h
- TransparencyOptionBits : transparency.h
- TRANSPARENT_BIT : sprites.h
- TREE_CACTUS : tree_map.h
- TREE_COUNT_RAINFOREST : tree_map.h
- TREE_COUNT_SUB_ARCTIC : tree_map.h
- TREE_COUNT_SUB_TROPICAL : tree_map.h
- TREE_COUNT_TEMPERATE : tree_map.h
- TREE_COUNT_TOYLAND : tree_map.h
- TREE_GROUND_GRASS : tree_map.h
- TREE_GROUND_ROUGH : tree_map.h
- TREE_GROUND_SHORE : tree_map.h
- TREE_GROUND_SNOW_DESERT : tree_map.h
- TREE_INVALID : tree_map.h
- TREE_RAINFOREST : tree_map.h
- TREE_SUB_ARCTIC : tree_map.h
- TREE_SUB_TROPICAL : tree_map.h
- TREE_TEMPERATE : tree_map.h
- TREE_TOYLAND : tree_map.h
- TreeGround : tree_map.h
- TreePlacer : tree_cmd.cpp
- TreeType : tree_map.h
- TropicZone : tile_type.h
- TROPICZONE_DESERT : tile_type.h
- TROPICZONE_NORMAL : tile_type.h
- TROPICZONE_RAINFOREST : tile_type.h
- TruncateString() : gfx.cpp
- TS_ARTICULATED_PART : train.h
- TS_ENGINE : train.h
- TS_FREE_WAGON : train.h
- TS_FRONT : train.h
- TS_MULTIHEADED : train.h
- TS_WAGON : train.h
- ttd_opendir() : fios.h
- ttd_strlcat() : string.cpp , string_func.h
- ttd_strnlen() : string_func.h
- TTDPatch_To_OTTDIndex : currency.cpp