#include "core/math_func.hpp"
#include "tile_type.h"
#include "map_type.h"
#include "direction_func.h"

Data Structures
class	Tile
	Wrapper class to abstract away the way the tiles are stored. More...

struct	Tile::TileBase
	Data that is stored per tile. More...

struct	Tile::TileExtended
	Data that is stored per tile. More...

struct	Map
	Size related data of the map. More...

struct	Map::Iterator
	Iterator to iterate all Tiles. More...

struct	Map::IterateWrapper

Macros
#define	TILE_ADD(x, y) ((x) + (y))
	Adds two tiles together. More...

#define	TILE_ADDXY(tile, x, y) TILE_ADD(tile, TileDiffXY(x, y))
	Adds a given offset to a tile. More...

#define	RandomTile() RandomTileSeed(Random())
	Get a valid random tile. More...

Typedefs
typedef int32_t	TileIndexDiff
	An offset value between two tiles. More...

typedef bool	TestTileOnSearchProc(TileIndex tile, void *user_data)
	A callback function type for searching tiles. More...

Functions
static debug_inline TileIndex	TileXY (uint x, uint y)
	Returns the TileIndex of a coordinate. More...

TileIndexDiff	TileDiffXY (int x, int y)
	Calculates an offset for the given coordinate(-offset). More...

static debug_inline TileIndex	TileVirtXY (uint x, uint y)
	Get a tile from the virtual XY-coordinate. More...

static debug_inline uint	TileX (TileIndex tile)
	Get the X component of a tile. More...

static debug_inline uint	TileY (TileIndex tile)
	Get the Y component of a tile. More...

TileIndexDiff	ToTileIndexDiff (TileIndexDiffC tidc)
	Return the offset between two tiles from a TileIndexDiffC struct. More...

TileIndex	TileAddWrap (TileIndex tile, int addx, int addy)
	This function checks if we add addx/addy to tile, if we do wrap around the edges. More...

TileIndexDiffC	TileIndexDiffCByDiagDir (DiagDirection dir)
	Returns the TileIndexDiffC offset from a DiagDirection. More...

TileIndexDiffC	TileIndexDiffCByDir (Direction dir)
	Returns the TileIndexDiffC offset from a Direction. More...

TileIndex	AddTileIndexDiffCWrap (TileIndex tile, TileIndexDiffC diff)
	Add a TileIndexDiffC to a TileIndex and returns the new one. More...

TileIndexDiffC	TileIndexToTileIndexDiffC (TileIndex tile_a, TileIndex tile_b)
	Returns the diff between two tiles. More...

uint	DistanceManhattan (TileIndex, TileIndex)
	also known as L1-Norm. Is the shortest distance one could go over diagonal tracks (or roads) More...

uint	DistanceSquare (TileIndex, TileIndex)
	euclidian- or L2-Norm squared More...

uint	DistanceMax (TileIndex, TileIndex)
	also known as L-Infinity-Norm More...

uint	DistanceMaxPlusManhattan (TileIndex, TileIndex)
	Max + Manhattan. More...

uint	DistanceFromEdge (TileIndex)
	shortest distance from any edge of the map More...

uint	DistanceFromEdgeDir (TileIndex, DiagDirection)
	distance from the map edge in given direction More...

TileIndexDiff	TileOffsByDiagDir (DiagDirection dir)
	Convert a DiagDirection to a TileIndexDiff. More...

TileIndexDiff	TileOffsByDir (Direction dir)
	Convert a Direction to a TileIndexDiff. More...

TileIndex	TileAddByDir (TileIndex tile, Direction dir)
	Adds a Direction to a tile. More...

TileIndex	TileAddByDiagDir (TileIndex tile, DiagDirection dir)
	Adds a DiagDir to a tile. More...

DiagDirection	DiagdirBetweenTiles (TileIndex tile_from, TileIndex tile_to)
	Determines the DiagDirection to get from one tile to another. More...

bool	CircularTileSearch (TileIndex tile, uint size, TestTileOnSearchProc proc, void user_data)
	Function performing a search around a center tile and going outward, thus in circle. More...

bool	CircularTileSearch (TileIndex tile, uint radius, uint w, uint h, TestTileOnSearchProc proc, void user_data)
	Generalized circular search allowing for rectangles and a hole. More...

TileIndex	RandomTileSeed (uint32_t r)
	Get a random tile out of a given seed. More...

uint	GetClosestWaterDistance (TileIndex tile, bool water)
	Finds the distance for the closest tile with water/land given a tile. More...

Detailed Description

Functions related to maps.

Definition in file map_func.h.

Macro Definition Documentation

◆ RandomTile

#define RandomTile ( ) RandomTileSeed(Random())

Get a valid random tile.

Note: a define so 'random' gets inserted in the place where it is actually called, thus making the random traces more explicit.

Returns: a valid tile

Definition at line 657 of file map_func.h.

◆ TILE_ADD

#define TILE_ADD	(	x,
		y
	)	((x) + (y))

Adds two tiles together.

Parameters

x	One tile
y	Another tile to add

Returns: The resulting tile(index)

Definition at line 466 of file map_func.h.

◆ TILE_ADDXY

#define TILE_ADDXY	(	tile,
		x,
		y
	)	TILE_ADD(tile, TileDiffXY(x, y))

Adds a given offset to a tile.

Parameters

tile	The tile to add an offset on it
x	The x offset to add to the tile
y	The y offset to add to the tile

Definition at line 480 of file map_func.h.

Typedef Documentation

◆ TestTileOnSearchProc

typedef bool TestTileOnSearchProc(TileIndex tile, void *user_data)

A callback function type for searching tiles.

Parameters

tile	The tile to test
user_data	additional data for the callback function to use

Returns: A boolean value, depend on the definition of the function.

Definition at line 636 of file map_func.h.

◆ TileIndexDiff

typedef int32_t TileIndexDiff

An offset value between two tiles.

This value is used for the difference between two tiles. It can be added to a TileIndex to get the resulting TileIndex of the start tile applied with this saved difference.

See also: TileDiffXY(int, int)

Definition at line 376 of file map_func.h.

Function Documentation

◆ AddTileIndexDiffCWrap()

TileIndex AddTileIndexDiffCWrap	(	TileIndex	tile,
		TileIndexDiffC	diff
	)

inline

Add a TileIndexDiffC to a TileIndex and returns the new one.

Returns tile + the diff given in diff. If the result tile would end up outside of the map, INVALID_TILE is returned instead.

Parameters

tile	The base tile to add the offset on
diff	The offset to add on the tile

Returns: The resulting TileIndex

Definition at line 522 of file map_func.h.

Referenced by CalculateCoverageLine().

◆ CircularTileSearch() [1/2]

bool CircularTileSearch	(	TileIndex *	tile,
		uint	radius,
		uint	w,
		uint	h,
		TestTileOnSearchProc	proc,
		void *	user_data
	)

Generalized circular search allowing for rectangles and a hole.

Function performing a search around a center rectangle and going outward. The center rectangle is left out from the search. To do a rectangular search without a hole, set either h or w to zero. Every tile will be tested by means of the callback function proc, which will determine if yes or no the given tile meets criteria of search.

Parameters

tile	to start the search from. Upon completion, it will return the tile matching the search. This tile should be directly north of the hole (if any).
radius	How many tiles to search outwards. Note: This is a radius and thus different from the size parameter of the other CircularTileSearch function, which is a diameter.
w	the width of the inner rectangle
h	the height of the inner rectangle
proc	callback testing function pointer.
user_data	to be passed to the callback function. Depends on the implementation

Returns: result of the search

Precondition: proc != nullptr; radius > 0

Definition at line 298 of file map.cpp.

◆ CircularTileSearch() [2/2]

bool CircularTileSearch	(	TileIndex *	tile,
		uint	size,
		TestTileOnSearchProc	proc,
		void *	user_data
	)

Function performing a search around a center tile and going outward, thus in circle.

Although it really is a square search... Every tile will be tested by means of the callback function proc, which will determine if yes or no the given tile meets criteria of search.

Parameters

tile	to start the search from. Upon completion, it will return the tile matching the search
size	number of tiles per side of the desired search area
proc	callback testing function pointer.
user_data	to be passed to the callback function. Depends on the implementation

Returns: result of the search

Precondition: proc != nullptr; size > 0

Definition at line 260 of file map.cpp.

References CircularTileSearch(), DIR_N, and TileAddByDir().

Referenced by ChopLumberMillTrees(), CircularTileSearch(), CreateRivers(), FindNearestGoodCoastalTownSpot(), GetDistanceFromNearbyHouse(), GrowTownWithBridge(), TownActionBuildStatue(), and TryBuildTransmitter().

◆ DiagdirBetweenTiles()

DiagDirection DiagdirBetweenTiles	(	TileIndex	tile_from,
		TileIndex	tile_to
	)

inline

Determines the DiagDirection to get from one tile to another.

The tiles do not necessarily have to be adjacent.

Parameters

tile_from	Origin tile
tile_to	Destination tile

Returns: DiagDirection from tile_from towards tile_to, or INVALID_DIAGDIR if the tiles are not on an axis

Definition at line 616 of file map_func.h.

References DIAGDIR_NE, DIAGDIR_NW, DIAGDIR_SE, DIAGDIR_SW, INVALID_DIAGDIR, TileX(), and TileY().

Referenced by TrainController().

◆ DistanceFromEdge()

uint DistanceFromEdge ( TileIndex tile )

shortest distance from any edge of the map

Parameters

tile	the tile to get the distance from

Returns: the distance from the edge in tiles

Definition at line 219 of file map.cpp.

References Map::SizeX(), Map::SizeY(), TileX(), and TileY().

Referenced by GrowTownWithExtraHouse(), IsRoadAllowedHere(), and TownCanBePlacedHere().

◆ DistanceFromEdgeDir()

uint DistanceFromEdgeDir	(	TileIndex	tile,
		DiagDirection	dir
	)

distance from the map edge in given direction

Parameters

tile	the tile to get the distance from
dir	the direction of interest

Returns: the distance from the edge in tiles

Definition at line 236 of file map.cpp.

References _settings_game, GameSettings::construction, DIAGDIR_NE, DIAGDIR_NW, DIAGDIR_SE, DIAGDIR_SW, ConstructionSettings::freeform_edges, Map::MaxX(), Map::MaxY(), TileX(), and TileY().

Referenced by CheckScaledDistanceFromEdge(), and GetOtherAqueductEnd().

◆ DistanceManhattan()

uint DistanceManhattan	(	TileIndex	t0,
		TileIndex	t1
	)

also known as L1-Norm. Is the shortest distance one could go over diagonal tracks (or roads)

The Manhattan distance is the sum of the delta of both the X and Y component. Also known as L1-Norm

Parameters

t0	the start tile
t1	the end tile

Returns: the distance

Definition at line 159 of file map.cpp.

References Delta(), TileX(), and TileY().

Referenced by AirportGetNearestTown(), CheckSubsidyDistance(), DeleteStaleLinks(), FindDeletedWaypointCloseTo(), FindSubsidyPassengerRoute(), FlowRiver(), FlowsDown(), GetClosestObject(), CargoPacket::GetDistance(), GetDistanceFromNearbyHouse(), IndustriesScopeResolver::GetVariable(), ObjectScopeResolver::GetVariable(), VpSetPresizeRange(), and YapfTrainCheckReverse().

◆ DistanceMax()

uint DistanceMax	(	TileIndex	t0,
		TileIndex	t1
	)

also known as L-Infinity-Norm

Also known as L-Infinity-Norm.

Parameters

t0	the start tile
t1	the end tile

Returns: the distance

Definition at line 191 of file map.cpp.

References Delta(), TileX(), and TileY().

Referenced by Station::AddIndustryToDeliver(), CheckIfFarEnoughFromConflictingIndustry(), and CheckIfIndustryIsAllowed().

◆ DistanceMaxPlusManhattan()

uint DistanceMaxPlusManhattan	(	TileIndex	t0,
		TileIndex	t1
	)

Max + Manhattan.

two times the biggest distance component and once the smallest component.

Parameters

t0	the start tile
t1	the end tile

Returns: the distance

Definition at line 207 of file map.cpp.

References Delta(), TileX(), and TileY().

Referenced by DemandCalculator::CalcDemand().

◆ DistanceSquare()

uint DistanceSquare	(	TileIndex	t0,
		TileIndex	t1
	)

euclidian- or L2-Norm squared

The 'Square' distance is the square of the shortest (straight line) distance between the two tiles. Also known as euclidian- or L2-Norm squared.

Parameters

t0	the start tile
t1	the end tile

Returns: the distance

Definition at line 176 of file map.cpp.

References TileX(), and TileY().

Referenced by CmdBuildBridge(), CmdBuildTunnel(), GetTownRadiusGroup(), IndustriesScopeResolver::GetVariable(), and ObjectScopeResolver::GetVariable().

◆ GetClosestWaterDistance()

uint GetClosestWaterDistance	(	TileIndex	tile,
		bool	water
	)

Finds the distance for the closest tile with water/land given a tile.

Parameters

tile	the tile to find the distance too
water	whether to find water or land

Returns: distance to nearest water (max 0x7F) / land (max 0x1FF; 0x200 if there is no land)

Definition at line 342 of file map.cpp.

References HasTileWaterGround().

Referenced by FindFurthestFromWater(), and IndustriesScopeResolver::GetVariable().

◆ RandomTileSeed()

TileIndex RandomTileSeed ( uint32_t r )

inline

Get a random tile out of a given seed.

Parameters

r	the random 'seed'

Returns: a valid tile

Definition at line 646 of file map_func.h.

References Map::WrapToMap().

◆ TileAddByDiagDir()

TileIndex TileAddByDiagDir	(	TileIndex	tile,
		DiagDirection	dir
	)

inline

Adds a DiagDir to a tile.

Parameters

tile	The current tile
dir	The direction in which we want to step

Returns: the moved tile

Definition at line 604 of file map_func.h.

References TILE_ADD, and TileOffsByDiagDir().

Referenced by CleanUpRoadBits(), ClearPathReservation(), DrawRoadTypeCatenary(), CFollowTrackT< Ttr_type_, VehicleType, T90deg_turns_allowed_, Tmask_reserved_tracks >::FollowTileExit(), GrowTownWithBridge(), GrowTownWithExtraHouse(), GrowTownWithTunnel(), MarkDirtyAdjacentLevelCrossingTiles(), MaskWireBits(), RiverMakeWider(), SetWaterClassDependingOnSurroundings(), TryPathReserve(), and UpdateLevelCrossing().

◆ TileAddByDir()

TileIndex TileAddByDir	(	TileIndex	tile,
		Direction	dir
	)

inline

Adds a Direction to a tile.

Parameters

tile	The current tile
dir	The direction in which we want to step

Returns: the moved tile

Definition at line 592 of file map_func.h.

References TILE_ADD, and TileOffsByDir().

Referenced by CircularTileSearch().

◆ TileAddWrap()

TileIndex TileAddWrap	(	TileIndex	tile,
		int	addx,
		int	addy
	)

This function checks if we add addx/addy to tile, if we do wrap around the edges.

For example, tile = (10,2) and addx = +3 and addy = -4. This function will now return INVALID_TILE, because the y is wrapped. This is needed in for example, farmland. When the tile is not wrapped, the result will be tile + TileDiffXY(addx, addy)

Parameters

tile	the 'starting' point of the adding
addx	the amount of tiles in the X direction to add
addy	the amount of tiles in the Y direction to add

Returns: translated tile, or INVALID_TILE when it would've wrapped.

Definition at line 116 of file map.cpp.

Referenced by CheckIfIndustryTilesAreFree(), CmdRemoveRoadStop(), and CountMapSquareAround().

◆ TileDiffXY()

TileIndexDiff TileDiffXY	(	int	x,
		int	y
	)

inline

Calculates an offset for the given coordinate(-offset).

This function calculate an offset value which can be added to a TileIndex. The coordinates can be negative.

Parameters

x	The offset in x direction
y	The offset in y direction

Returns: The resulting offset value of the given coordinate

See also: ToTileIndexDiff(TileIndexDiffC)

Definition at line 401 of file map_func.h.

Referenced by CheckIfCanLevelIndustryPlatform(), CmdBuildShipDepot(), CmdTerraformLand(), GetOtherShipDepotTile(), Station::GetPlatformLength(), GetReferenceTile(), Airport::GetRotatedTileFromOffset(), GUIPlaceProcDragXY(), Station::MarkTilesDirty(), OrthogonalTileIterator::operator++(), SetupFarmFieldFence(), and TerraformAddDirtyTileAround().

◆ TileIndexDiffCByDiagDir()

TileIndexDiffC TileIndexDiffCByDiagDir ( DiagDirection dir )

inline

Returns the TileIndexDiffC offset from a DiagDirection.

Parameters

dir	The given direction

Returns: The offset as TileIndexDiffC value

Definition at line 490 of file map_func.h.

References _tileoffs_by_diagdir, DIAGDIR_END, and IsValidDiagDirection().

Referenced by CalculateCoverageLine().

◆ TileIndexDiffCByDir()

TileIndexDiffC TileIndexDiffCByDir ( Direction dir )

inline

Returns the TileIndexDiffC offset from a Direction.

Parameters

dir	The given direction

Returns: The offset as TileIndexDiffC value

Definition at line 504 of file map_func.h.

References _tileoffs_by_dir, DIR_END, and IsValidDirection().

◆ TileIndexToTileIndexDiffC()

TileIndexDiffC TileIndexToTileIndexDiffC	(	TileIndex	tile_a,
		TileIndex	tile_b
	)

inline

Returns the diff between two tiles.

Parameters

tile_a	from tile
tile_b	to tile

Returns: the difference between tila_a and tile_b

Definition at line 538 of file map_func.h.

References TileX(), TileY(), TileIndexDiffC::x, and TileIndexDiffC::y.

Referenced by GetTownRoadGridElement(), TownLayoutAllows2x2HouseHere(), and TownLayoutAllowsHouseHere().

◆ TileOffsByDiagDir()

TileIndexDiff TileOffsByDiagDir ( DiagDirection dir )

inline

Convert a DiagDirection to a TileIndexDiff.

Parameters

dir	The DiagDirection

Returns: The resulting TileIndexDiff

See also: TileIndexDiffCByDiagDir

Definition at line 563 of file map_func.h.

References _tileoffs_by_diagdir, DIAGDIR_END, IsValidDiagDirection(), and ToTileIndexDiff().

Referenced by CanConnectToRoad(), CanFollowRoad(), CanRoadContinueIntoNextTile(), CheckForDockingTile(), CheckFree2x2Area(), RoadStop::Entry::CheckIntegrity(), CheckTownBuild2House(), CheckTownBuild2x2House(), ClearDockingTilesCheckingNeighbours(), RoadStop::ClearDriveThrough(), CmdBuildLongRoad(), ConnectRoadToStructure(), DisasterTick_Submarine(), DoBuildLock(), DoClearBridge(), ExtendTrainReservation(), FindDockLandPart(), FixOwnerOfRailTrack(), FollowReservation(), FollowTrainReservation(), GetBridgeEnd(), GetOtherAqueductEnd(), GetOtherTunnelEnd(), Station::GetPlatformLength(), GetTrainForReservation(), GrowTownWithBridge(), GrowTownWithTunnel(), CYapfCostRailT< Types >::IsAnyStationTileReserved(), IsNeighborRoadTile(), IsShipDestinationTile(), IsTunnelInWayDir(), RoadStop::MakeDriveThrough(), MakeLock(), MarkBridgeDirty(), NeighbourIsNormal(), NPFSaveTargetData(), CYapfCostRoadT< Types >::OneTileCost(), RoadStop::Entry::Rebuild(), RemoveDock(), RemoveLock(), CYapfReserveTrack< Types >::ReserveRailStationPlatform(), SetRailStationPlatformReservation(), TestTownOwnsBridge(), TileAddByDiagDir(), TrainApproachingCrossing(), TrainApproachingCrossingTile(), CYapfReserveTrack< Types >::UnreserveSingleTrack(), UpdateAdjacentLevelCrossingTilesOnLevelCrossingRemoval(), and UpdateSignalsInBuffer().

◆ TileOffsByDir()

TileIndexDiff TileOffsByDir ( Direction dir )

inline

Convert a Direction to a TileIndexDiff.

Parameters

dir	The direction to convert from

Returns: The resulting TileIndexDiff

Definition at line 577 of file map_func.h.

References _tileoffs_by_dir, DIR_END, IsValidDirection(), and ToTileIndexDiff().

Referenced by MarkCanalsAndRiversAroundDirty(), TileAddByDir(), and TileLoop_Water().

◆ TileVirtXY()

static debug_inline TileIndex TileVirtXY	(	uint	x,
		uint	y
	)

static

Get a tile from the virtual XY-coordinate.

Parameters

x	The virtual x coordinate of the tile.
y	The virtual y coordinate of the tile.

Returns: The TileIndex calculated by the coordinate.

Definition at line 416 of file map_func.h.

Referenced by AircraftLandAirplane(), CheckGroundVehiclesAtCorrectZ(), CheckTrainCollision(), CrashAirplane(), DrawStationCoverageAreaText(), FindStationsAroundSelection(), GetTileHeightBelowAircraft(), BuildRoadToolbarWindow::OnHotkey(), BuildRailToolbarWindow::OnHotkey(), UpdateStatusAfterSwap(), and YapfTrainCheckReverse().

◆ TileX()

static debug_inline uint TileX ( TileIndex tile )

static

Get the X component of a tile.

Parameters

tile	the tile to get the X component of

Returns: the X component

Definition at line 427 of file map_func.h.

Referenced by OrthogonalTileArea::Add(), AyStar::AddStartNode(), AircraftGetEntryPoint(), AirportGetNearestTown(), AlignTileToGrid(), TileMatrix< T, N >::AllocateStorage(), CalcClosestStationTile(), CheckIfCanLevelIndustryPlatform(), OrthogonalTileArea::ClampToMap(), CmdBuildLongRoad(), CmdClearArea(), CmdRemoveLongRoad(), OrthogonalTileArea::Contains(), DiagonalTileArea::Contains(), DiagdirBetweenTiles(), DiagonalTileArea::DiagonalTileArea(), DistanceFromEdge(), DistanceFromEdgeDir(), DistanceManhattan(), DistanceMax(), DistanceMaxPlusManhattan(), DistanceSquare(), SmallMapWindow::DrawTowns(), TileMatrix< T, N >::GetAreaForTile(), CargoPacket::GetDistance(), WaterRegion::GetLocalIndex(), GetOtherAqueductEnd(), GetPCPElevation(), RailTypeScopeResolver::GetRandomBits(), RoadTypeScopeResolver::GetRandomBits(), GetTileMaxZ(), GetTileSlope(), GetTileZ(), GetTLG(), GetTunnelBridgeLength(), HouseScopeResolver::GetVariable(), ObjectScopeResolver::GetVariable(), GUIPlaceProcDragXY(), Town::InitializeLayout(), CommandHelperBase::InternalPostBefore(), OrthogonalTileArea::Intersects(), IsTileAlignedToGrid(), IsTileFlat(), IsTunnelInWay(), AirportSpec::IsWithinMapBounds(), MarkTileDirtyByTile(), NPFDistanceTrack(), NPFHash(), OrthogonalTileArea::OrthogonalTileArea(), CYapfDestinationTileWaterT< Types >::PfCalcEstimate(), CYapfDestinationTileT< Types >::PfCalcEstimate(), CYapfDestinationTileOrStationRailT< Types >::PfCalcEstimate(), CYapfDestinationTileRoadT< Types >::PfCalcEstimate(), River_Hash(), ScrollMainWindowToTile(), ScrollWindowToTile(), SetWaterClassDependingOnSurroundings(), SwapDirection(), TerraformAddDirtyTileAround(), TileIndexToTileIndexDiffC(), TileStr(), CargoPacket::UpdateLoadingTile(), CargoPacket::UpdateUnloadingTile(), Waypoint::UpdateVirtCoord(), Town::UpdateVirtCoord(), and Station::UpdateVirtCoord().

◆ TileXY()

static debug_inline TileIndex TileXY	(	uint	x,
		uint	y
	)

static

Returns the TileIndex of a coordinate.

Parameters

x	The x coordinate of the tile
y	The y coordinate of the tile

Returns: The TileIndex calculated by the coordinate

Definition at line 385 of file map_func.h.

Referenced by OrthogonalTileArea::Add(), AlignTileToGrid(), FlatEmptyWorld(), GetTileMaxZ(), GetTileSlope(), GetTileZ(), GetWaterRegionCenterTile(), BitmapTileArea::Initialize(), IsTileFlat(), OrthogonalTileArea::OrthogonalTileArea(), Station::RecomputeCatchment(), and StationRect::ScanForStationTiles().

◆ TileY()

static debug_inline uint TileY ( TileIndex tile )

static

Get the Y component of a tile.

Parameters

tile	the tile to get the Y component of

Returns: the Y component

Definition at line 437 of file map_func.h.

Referenced by OrthogonalTileArea::Add(), AyStar::AddStartNode(), AircraftGetEntryPoint(), AirportGetNearestTown(), AlignTileToGrid(), CalcClosestStationTile(), CheckIfCanLevelIndustryPlatform(), OrthogonalTileArea::ClampToMap(), CmdBuildLongRoad(), CmdClearArea(), CmdRemoveLongRoad(), OrthogonalTileArea::Contains(), DiagonalTileArea::Contains(), DiagdirBetweenTiles(), DiagonalTileArea::DiagonalTileArea(), DistanceFromEdge(), DistanceFromEdgeDir(), DistanceManhattan(), DistanceMax(), DistanceMaxPlusManhattan(), DistanceSquare(), SmallMapWindow::DrawTowns(), CargoPacket::GetDistance(), GetOtherAqueductEnd(), RailTypeScopeResolver::GetRandomBits(), RoadTypeScopeResolver::GetRandomBits(), GetTileMaxZ(), GetTileSlope(), GetTileZ(), GetTLG(), GetTunnelBridgeLength(), HouseScopeResolver::GetVariable(), ObjectScopeResolver::GetVariable(), GUIPlaceProcDragXY(), Town::InitializeLayout(), CommandHelperBase::InternalPostBefore(), OrthogonalTileArea::Intersects(), IsTileAlignedToGrid(), IsTileFlat(), IsTunnelInWay(), AirportSpec::IsWithinMapBounds(), MarkTileDirtyByTile(), NPFDistanceTrack(), OrthogonalTileArea::OrthogonalTileArea(), CYapfDestinationTileWaterT< Types >::PfCalcEstimate(), CYapfDestinationTileT< Types >::PfCalcEstimate(), CYapfDestinationTileOrStationRailT< Types >::PfCalcEstimate(), CYapfDestinationTileRoadT< Types >::PfCalcEstimate(), River_Hash(), ScrollMainWindowToTile(), ScrollWindowToTile(), SetWaterClassDependingOnSurroundings(), SwapDirection(), TerraformAddDirtyTileAround(), TileIndexToTileIndexDiffC(), TileStr(), CargoPacket::UpdateLoadingTile(), CargoPacket::UpdateUnloadingTile(), Waypoint::UpdateVirtCoord(), Town::UpdateVirtCoord(), and Station::UpdateVirtCoord().

◆ ToTileIndexDiff()

TileIndexDiff ToTileIndexDiff ( TileIndexDiffC tidc )

inline

Return the offset between two tiles from a TileIndexDiffC struct.

This function works like TileDiffXY(int, int) and returns the difference between two tiles.

Parameters

tidc	The coordinate of the offset as TileIndexDiffC

Returns: The difference between two tiles.

See also: TileDiffXY(int, int)

Definition at line 452 of file map_func.h.

References Map::LogX(), TileIndexDiffC::x, and TileIndexDiffC::y.

Referenced by Airport::GetRotatedTileFromOffset(), AirportTileTableIterator::operator++(), RoadTypesAllowHouseHere(), TileOffsByDiagDir(), and TileOffsByDir().

Data Structures

Macros

Typedefs

Functions

Detailed Description

Macro Definition Documentation

◆ RandomTile

◆ TILE_ADD

◆ TILE_ADDXY

Typedef Documentation

◆ TestTileOnSearchProc

◆ TileIndexDiff

Function Documentation

◆ AddTileIndexDiffCWrap()

◆ CircularTileSearch() [1/2]

◆ CircularTileSearch() [2/2]

◆ DiagdirBetweenTiles()

◆ DistanceFromEdge()

◆ DistanceFromEdgeDir()

◆ DistanceManhattan()

◆ DistanceMax()

◆ DistanceMaxPlusManhattan()

◆ DistanceSquare()

◆ GetClosestWaterDistance()

◆ RandomTileSeed()

◆ TileAddByDiagDir()

◆ TileAddByDir()

◆ TileAddWrap()

◆ TileDiffXY()

◆ TileIndexDiffCByDiagDir()

◆ TileIndexDiffCByDir()

◆ TileIndexToTileIndexDiffC()

◆ TileOffsByDiagDir()

◆ TileOffsByDir()

◆ TileVirtXY()

◆ TileX()

◆ TileXY()

◆ TileY()

◆ ToTileIndexDiff()