# map_func.h File Reference

Functions related to maps. More...

`#include "tile_type.h"`
`#include "map_type.h"`
`#include "direction_func.h"`

Go to the source code of this file.

## Defines

#define | TILE_MASK(x) ((x) & _map_tile_mask)
| 'Wraps' the given tile to it is within the map.
#define | TILE_ADD(x, y) ((x) + (y))
| Adds to tiles together.
#define | TILE_ADDXY(tile, x, y) TILE_ADD(tile, TileDiffXY(x, y))
| Adds a given offset to a tile.
#define | TILE_LOOP(var, w, h, tile)
| A loop which iterates to a square of tiles.
#define | TILE_AREA_LOOP(var, ta) TILE_LOOP(var, ta.w, ta.h, ta.tile)
| A loop which iterates over the tiles of a TileArea.
#define | RandomTile() RandomTileSeed(Random())
| Get a valid random tile.

## Typedefs

typedef int32 | TileIndexDiff
| An offset value between to tiles.
typedef bool | TestTileOnSearchProc (TileIndex tile, void *user_data)
| A callback function type for searching tiles.

## Functions

void | AllocateMap (uint size_x, uint size_y)
| Allocate a new map with the given size.
static uint | MapLogX ()
| Logarithm of the map size along the X side.
static uint | MapLogY ()
| Logarithm of the map size along the y side.
static uint | MapSizeX ()
| Get the size of the map along the X.
static uint | MapSizeY ()
| Get the size of the map along the Y.
static uint | MapSize ()
| Get the size of the map.
static uint | MapMaxX ()
| Gets the maximum X coordinate within the map, including MP_VOID.
static uint | MapMaxY ()
| Gets the maximum Y coordinate within the map, including MP_VOID.
static uint | ScaleByMapSize (uint n)
| Scales the given value by the map size, where the given value is for a 256 by 256 map.
static uint | ScaleByMapSize1D (uint n)
| Scales the given value by the maps circumference, where the given value is for a 256 by 256 map.
static TileIndex | TileXY (uint x, uint y)
| Returns the TileIndex of a coordinate.
static TileIndexDiff | TileDiffXY (int x, int y)
| Calculates an offset for the given coordinate(-offset).
static TileIndex | TileVirtXY (uint x, uint y)
static uint | TileX (TileIndex tile)
| Get the X component of a tile.
static uint | TileY (TileIndex tile)
| Get the Y component of a tile.
static TileIndexDiff | ToTileIndexDiff (TileIndexDiffC tidc)
| Return the offset between to tiles from a TileIndexDiffC struct.
TileIndex | TileAddWrap (TileIndex tile, int addx, int addy)
| Adds an offset to a tile and check if we are still on the map.
static TileIndexDiffC | TileIndexDiffCByDiagDir (DiagDirection dir)
| Returns the TileIndexDiffC offset from a DiagDirection.
static TileIndexDiffC | TileIndexDiffCByDir (Direction dir)
| Returns the TileIndexDiffC offset from a Direction.
static TileIndex | AddTileIndexDiffCWrap (TileIndex tile, TileIndexDiffC diff)
| Add a TileIndexDiffC to a TileIndex and returns the new one.
static TileIndexDiffC | TileIndexToTileIndexDiffC (TileIndex tile_a, TileIndex tile_b)
| Returns the diff between two tiles.
uint | DistanceManhattan (TileIndex, TileIndex)
| also known as L1-Norm. Is the shortest distance one could go over diagonal tracks (or roads)
uint | DistanceSquare (TileIndex, TileIndex)
| euclidian- or L2-Norm squared
uint | DistanceMax (TileIndex, TileIndex)
| also known as L-Infinity-Norm
uint | DistanceMaxPlusManhattan (TileIndex, TileIndex)
| Max + Manhattan.
uint | DistanceFromEdge (TileIndex)
| shortest distance from any edge of the map
static TileIndexDiff | TileOffsByDiagDir (DiagDirection dir)
| Convert a DiagDirection to a TileIndexDiff.
static TileIndexDiff | TileOffsByDir (Direction dir)
| Convert a Direction to a TileIndexDiff.
static TileIndex | TileAddByDiagDir (TileIndex tile, DiagDirection dir)
| Adds a DiagDir to a tile.
static DiagDirection | DiagdirBetweenTiles (TileIndex tile_from, TileIndex tile_to)
| Determines the DiagDirection to get from one tile to another.
bool | CircularTileSearch (TileIndex *tile, uint size, TestTileOnSearchProc proc, void *user_data)
| Searches for some cirumstances of a tile around a given tile with a helper function.
bool | CircularTileSearch (TileIndex *tile, uint radius, uint w, uint h, TestTileOnSearchProc proc, void *user_data)
| Searches for some cirumstances of a tile around a given rectangle with a helper function.
static TileIndex | RandomTileSeed (uint32 r)
| Get a random tile out of a given seed.
uint | GetClosestWaterDistance (TileIndex tile, bool water)
| Finds the distance for the closest tile with water/land given a tile.

## Variables

uint | _map_tile_mask
| _map_size - 1 (to mask the mapsize)
Tile * | _m
| Pointer to the tile-array.
TileExtended * | _me
| Pointer to the extended tile-array.

## Detailed Description

Functions related to maps.

Definition in file map_func.h.

## Define Documentation

#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 456 of file map_func.h.

Referenced by CmdBuildIndustry(), DisasterTick_Big_Ufo(), DisasterTick_Ufo(), MaybeNewIndustry(), PlaceInitialIndustry(), PlaceMoreTrees(), and ReleaseDisastersTargetingVehicle().

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

Adds to tiles together.

Parameters:

  | x | One tile
  | y | Another tile to add

Returns:
  The resulting tile(index)

Definition at line 244 of file map_func.h.

Referenced by CalcHeightdiff(), CFollowTrackT< Ttr_type_, VehicleType, T90deg_turns_allowed_, Tmask_reserved_tracks >::CanEnterNewTile(), CircularTileSearch(), FindStationsNearby(), CFollowTrackT< Ttr_type_, VehicleType, T90deg_turns_allowed_, Tmask_reserved_tracks >::FollowTileExit(), Ship::GetOrderStationLocation(), GrowTown(), IsNeighborRoadTile(), NPFSaveTargetData(), OPFShipChooseTrack(), CYapfReserveTrack< Types >::ReserveRailStationPlatform(), SetRailStationPlatformReservation(), TileAddByDiagDir(), and CYapfReserveTrack< Types >::UnreserveSingleTrack().

#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 258 of file map_func.h.

Referenced by CheckAllowRemoveRoad(), CheckNewIndustry_OilRefinery(), CheckNewIndustry_OilRig(), FindStationsNearby(), FloodVehicles(), and MakeTownHouseBigger().

#define TILE_AREA_LOOP | ( | var,
|  | ta |  | ) | TILE_LOOP(var, ta.w, ta.h, ta.tile)

A loop which iterates over the tiles of a TileArea.

This macro starts 2 nested loops which iterates over a square of tiles.

Parameters:

  | var | The name of the variable which contains the current tile
  | ta | The tile area to search over

Definition at line 358 of file map_func.h.

Referenced by AITileList::AddRectangle(), CmdBuildCanal(), CmdLevelLand(), CmdPlantTree(), DeallocateSpecFromStation(), FindStationsNearby(), FloodVehicles(), GenerateDesertArea(), GenerateRockyArea(), AIIndustry::GetDockLocation(), AIIndustry::GetHeliportLocation(), AIOrder::GetOrderDestination(), GetProductionAroundTiles(), SmallMapWindow::GetTileColours(), RemoveFromRailBaseStation(), RemoveRailStation(), and AITileList::RemoveRectangle().

#define TILE_LOOP | ( | var,
|  | w,
|  | h,
|  | tile |  | ) |

Value:

    for (uint var = tile, cur_h = (h); cur_h > 0; --cur_h, var += TileDiffXY(0, 1) - (w)) \
        for (uint cur_w = (w); cur_w > 0; --cur_w, var++)

A loop which iterates to a square of tiles.

This macro starts 2 nested loops which iterates over a square of tiles.

Parameters:

  | var | The name of the variable which contains the current tile
  | w | The width (x-width) of the square
  | h | The heigth (y-width) of the square
  | tile | The start tile of the square

Definition at line 346 of file map_func.h.

Referenced by AITileList_IndustryAccepting::AITileList_IndustryAccepting(), AITileList_IndustryProducing::AITileList_IndustryProducing(), AITileList_StationType::AITileList_StationType(), CanExpandRailStation(), CheckFlatLandBelow(), CheckIfCanLevelIndustryPlatform(), CommonRaiseLowerBigLand(), AIOrder::GetOrderDestination(), GetStationAround(), RemoveAirport(), and StationRect::ScanForStationTiles().

#define TILE_MASK | ( | x |  | ) | ((x) & _map_tile_mask)

'Wraps' the given tile to it is within the map.

It does this by masking the 'high' bits of.

Parameters:

  | x | the tile to 'wrap'

Definition at line 27 of file map_func.h.

Referenced by DisasterTick_Big_Ufo(), and RandomTileSeed().

## Typedef Documentation

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 428 of file map_func.h.

typedef int32 TileIndexDiff

An offset value between to tiles.

This value is used fro the difference between to 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 160 of file map_func.h.

## Function Documentation

static TileIndex AddTileIndexDiffCWrap | ( | TileIndex | tile,
|  | TileIndexDiffC | diff |
| ) |  |  | `[inline, static]`

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 303 of file map_func.h.

References INVALID_TILE, MapSizeX(), MapSizeY(), TileX(), TileXY(), TileY(), TileIndexDiffC::x, and TileIndexDiffC::y.

Referenced by TileLoop_Water().

void AllocateMap | ( | uint | size_x,
|  | uint | size_y |
| ) |  |  |

Allocate a new map with the given size.

(Re)allocates a map with the given dimension

Parameters:

  | size_x | the width of the map along the NE/SW edge
  | size_y | the 'height' of the map along the SE/NW edge

Definition at line 39 of file map.cpp.

References _map_log_x, _map_log_y, _map_size, _map_size_x, _map_size_y, _map_tile_mask, error(), FindFirstBit(), IsInsideMM(), MAX_MAP_SIZE, and MIN_MAP_SIZE.

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

Searches for some cirumstances of a tile around a given rectangle with a helper function.

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 != NULL
  radius > 0

Definition at line 278 of file map.cpp.

References DIAGDIR_BEGIN, DIAGDIR_END, DIR_W, INVALID_TILE, MapSizeX(), MapSizeY(), TileX(), TileXY(), TileY(), TileIndexDiffC::x, and TileIndexDiffC::y.

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

Searches for some cirumstances of a tile around a given tile with a helper function.

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 != NULL
  size > 0

Definition at line 240 of file map.cpp.

References CircularTileSearch(), DIR_N, TILE_ADD, and TileOffsByDir().

Referenced by ChopLumberMillTrees(), CircularTileSearch(), FindNearestGoodCoastalTownSpot(), FindStationsNearby(), GetDistanceFromNearbyHouse(), Station::RecomputeIndustriesNear(), and TownActionBuildStatue().

static DiagDirection DiagdirBetweenTiles | ( | TileIndex | tile_from,
|  | TileIndex | tile_to |
| ) |  |  | `[inline, static]`

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 408 of file map_func.h.

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

Referenced by AIBridge::_BuildBridgeRoad1(), AIBridge::_BuildBridgeRoad2(), AITunnel::_BuildTunnelRoad1(), AITunnel::_BuildTunnelRoad2(), and AIMarine::AreWaterTilesConnected().

uint DistanceFromEdge | ( | TileIndex | tile | ) |

shortest distance from any edge of the map

Param the minimum distance to an edge

Parameters:

  | tile | the tile to get the distance from

Returns:
  the distance from the edge in tiles

Definition at line 216 of file map.cpp.

References MapSizeX(), MapSizeY(), min(), TileX(), and TileY().

Referenced by CheckNewIndustry_OilRefinery(), CheckNewIndustry_OilRig(), GrayscaleToMapHeights(), GrowTownWithExtraHouse(), IsRoadAllowedHere(), and TownCanBePlacedHere().

uint DistanceManhattan | ( | TileIndex | t0,
|  | TileIndex | t1 |
| ) |  |  |

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

Gets the Manhattan distance between the two given tiles. 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 156 of file map.cpp.

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

Referenced by AirportGetNearestTown(), AIMarine::AreWaterTilesConnected(), AIRail::BuildRail(), CalcRaildirsDrawstyle(), AIRoad::CanBuildConnectedRoadPartsHere(), DeliverGoods(), FindDeletedWaypointCloseTo(), GetClosestDeletedStation(), GetCountAndDistanceOfClosestInstance(), GetDistanceFromNearbyHouse(), AITown::GetDistanceManhattanToTile(), AITile::GetDistanceManhattanToTile(), AIStation::GetDistanceManhattanToTile(), AIIndustry::GetDistanceManhattanToTile(), IndustryGetVariable(), IsCloseToTown(), CargoPayment::PayTransfer(), Station::RecomputeIndustriesNear(), AIRail::RemoveRail(), VpSelectTilesWithMethod(), VpSetPresizeRange(), and YapfTrainCheckReverse().

uint DistanceMax | ( | TileIndex | t0,
|  | TileIndex | t1 |
| ) |  |  |

also known as L-Infinity-Norm

Gets the biggest distance component (x or y) between the two given tiles. Also known as L-Infinity-Norm.

Parameters:

  | t0 | the start tile
  | t1 | the end tile

Returns:
  the distance

Definition at line 188 of file map.cpp.

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

Referenced by FindStationsNearby().

uint DistanceMaxPlusManhattan | ( | TileIndex | t0,
|  | TileIndex | t1 |
| ) |  |  |

Max + Manhattan.

Gets the biggest distance component (x or y) between the two given tiles plus the Manhattan distance, i.e. 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 204 of file map.cpp.

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

uint DistanceSquare | ( | TileIndex | t0,
|  | TileIndex | t1 |
| ) |  |  |

euclidian- or L2-Norm squared

Gets the 'Square' distance between the two given tiles. 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 173 of file map.cpp.

References TileX(), and TileY().

Referenced by FindNearestHangar(), AITown::GetDistanceSquareToTile(), AITile::GetDistanceSquareToTile(), AIStation::GetDistanceSquareToTile(), AIIndustry::GetDistanceSquareToTile(), GetTownRadiusGroup(), IndustryGetVariable(), and UpdateTownGrowRate().

uint GetClosestWaterDistance | ( | TileIndex | tile,
|  | bool | water |
| ) |  |  |

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

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)

Note:
  FAILS when an industry should be seen as water

Definition at line 323 of file map.cpp.

References _settings_game, GameSettings::construction, DIAGDIR_BEGIN, DIAGDIR_END, ConstructionSettings::freeform_edges, IsInsideMM(), IsTileType(), MapMaxX(), MapMaxY(), MapSize(), MP_VOID, MP_WATER, TileX(), TileXY(), and TileY().

Referenced by FindFurthestFromWater(), and IndustryGetVariable().

static uint MapLogX | ( |  | ) | `[inline, static]`

Logarithm of the map size along the X side.

Note:
  try to avoid using this one

Returns:
  2^"return value" == MapSizeX()

Definition at line 55 of file map_func.h.

References _map_log_x.

Referenced by ScaleByMapSize(), ScaleByMapSize1D(), StartupIndustryDailyChanges(), TileXY(), TileY(), and ToTileIndexDiff().

static uint MapLogY | ( |  | ) | `[inline, static]`

Logarithm of the map size along the y side.

Note:
  try to avoid using this one

Returns:
  2^"return value" == MapSizeY()

Definition at line 66 of file map_func.h.

References _map_log_y.

Referenced by ScaleByMapSize(), ScaleByMapSize1D(), and StartupIndustryDailyChanges().

static uint MapMaxX | ( |  | ) | `[inline, static]`

Gets the maximum X coordinate within the map, including MP_VOID.

Returns:
  the maximum X coordinate

Definition at line 106 of file map_func.h.

References MapSizeX().

Referenced by CalcRaildirsDrawstyle(), CheckIfCanLevelIndustryPlatform(), CmdBuildTunnel(), DisasterTick_Aircraft(), SmallMapWindow::DrawSmallMapColumn(), Station::GetCatchmentRect(), GetClosestWaterDistance(), GetTileMaxZ(), GetTileSlope(), GetTileZ(), GrayscaleToMapHeights(), GUIPlaceProcDragXY(), IsTunnelInWay(), SmallMapWindow::SetNewScroll(), SetTileType(), SetWaterClassDependingOnSurroundings(), TerraformTileHeight(), TgenSetTileHeight(), TileAddWrap(), TileX(), and TranslateXYToTileCoord().

static uint MapMaxY | ( |  | ) | `[inline, static]`

Gets the maximum Y coordinate within the map, including MP_VOID.

Returns:
  the maximum Y coordinate

Definition at line 115 of file map_func.h.

References MapSizeY().

Referenced by CalcRaildirsDrawstyle(), CheckIfCanLevelIndustryPlatform(), SmallMapWindow::DrawSmallMapColumn(), Station::GetCatchmentRect(), GetClosestWaterDistance(), GetTileMaxZ(), GetTileSlope(), GetTileZ(), GrayscaleToMapHeights(), GUIPlaceProcDragXY(), IsTunnelInWay(), SmallMapWindow::SetNewScroll(), SetTileType(), SetWaterClassDependingOnSurroundings(), TerraformTileHeight(), TgenSetTileHeight(), TileAddWrap(), and TranslateXYToTileCoord().

static uint MapSize | ( |  | ) | `[inline, static]`

Get the size of the map.

Returns:
  the number of tiles of the map

Definition at line 96 of file map_func.h.

References _map_size.

Referenced by TownViewWindow::CanDeleteTown(), TileArea::ClampToMap(), CmdBuildBridge(), CmdBuildCanal(), CmdBuildLongRoad(), CmdClearArea(), CmdConvertRail(), CmdLevelLand(), CmdPlantTree(), CmdRailTrackHelper(), CmdRemoveFromRailStation(), CmdRemoveFromRailWaypoint(), CmdRemoveLongRoad(), CmdSignalTrackHelper(), CmdTerraformLand(), DoCommand(), DoCommandPInternal(), DrawStationCoverageAreaText(), FindStationsNearby(), GetClosestWaterDistance(), AIMap::GetMapSize(), GetTileSlope(), GetTileType(), GetTropicZone(), GrowTownAtRoad(), GrowTownInTile(), IsValidTile(), AITile::LevelTiles(), AITile::LowerTile(), AITile::RaiseTile(), SetDefaultRailGui(), SetTileHeight(), SetTileType(), SetTropicZone(), TerraformTileHeight(), TileHeight(), TownLayoutAllows2x2HouseHere(), UpdateHousesAndTowns(), UpdateNearestTownForRoadTiles(), and Town::~Town().

static uint MapSizeX | ( |  | ) | `[inline, static]`

Get the size of the map along the X.

Returns:
  the number of tiles along the X of the map

Definition at line 76 of file map_func.h.

References _map_size_x.

Referenced by _GenerateWorld(), AddTileIndexDiffCWrap(), AllocHeightMap(), AIRail::AreTilesConnected(), CircularTileSearch(), TileArea::ClampToMap(), CommonRaiseLowerBigLand(), Disaster_Small_Ufo_Init(), DisasterTick_Aircraft(), DisasterTick_Big_Ufo_Destroyer(), DistanceFromEdge(), FixSlopes(), FlatEmptyWorld(), GenerateLandscape(), GenerateWorld(), GetAcceptanceAroundTiles(), AIVehicle::GetLocation(), AIMap::GetMapSizeX(), GetProductionAroundTiles(), GrayscaleToMapHeights(), MapMaxX(), ScrollWindowTo(), SetSelectionTilesDirty(), SimulateDrag(), TerraformTileHeight(), and TileDiffXY().

static uint MapSizeY | ( |  | ) | `[inline, static]`

Get the size of the map along the Y.

Returns:
  the number of tiles along the Y of the map

Definition at line 86 of file map_func.h.

References _map_size_y.

Referenced by _GenerateWorld(), AddTileIndexDiffCWrap(), AllocHeightMap(), CircularTileSearch(), TileArea::ClampToMap(), CommonRaiseLowerBigLand(), Disaster_Small_Ufo_Init(), DisasterTick_Zeppeliner(), DistanceFromEdge(), FixSlopes(), FlatEmptyWorld(), GenerateLandscape(), GenerateWorld(), GetAcceptanceAroundTiles(), AIVehicle::GetLocation(), AIMap::GetMapSizeY(), GetProductionAroundTiles(), GrayscaleToMapHeights(), MapMaxY(), ScrollWindowTo(), SetSelectionTilesDirty(), and TerraformTileHeight().

static TileIndex RandomTileSeed | ( | uint32 | r | ) | `[inline, static]`

Get a random tile out of a given seed.

Parameters:

  | r | the random 'seed'

Returns:
  a valid tile

Definition at line 445 of file map_func.h.

References TILE_MASK.

Referenced by PlaceTreesRandomly().

static uint ScaleByMapSize | ( | uint | n | ) | `[inline, static]`

Scales the given value by the map size, where the given value is for a 256 by 256 map.

Parameters:

  | n | the value to scale

Returns:
  the scaled size

Definition at line 126 of file map_func.h.

References MapLogX(), and MapLogY().

Referenced by GenerateIndustries(), GenerateLandscape(), GenerateTowns(), GenerateTrees(), GetScaledIndustryProbability(), PlaceMoreTrees(), and PlaceTreesRandomly().

static uint ScaleByMapSize1D | ( | uint | n | ) | `[inline, static]`

Scales the given value by the maps circumference, where the given value is for a 256 by 256 map.

Parameters:

  | n | the value to scale

Returns:
  the scaled size

Definition at line 141 of file map_func.h.

References MapLogX(), and MapLogY().

Referenced by GetScaledIndustryProbability(), and UpdateViewportPosition().

static TileIndex TileAddByDiagDir | ( | TileIndex | tile,
|  | DiagDirection | dir |
| ) |  |  | `[inline, static]`

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 396 of file map_func.h.

References TILE_ADD, and TileOffsByDiagDir().

Referenced by CleanUpRoadBits(), ClearPathReservation(), CmdRemoveSingleSignal(), GrowTownAtRoad(), GrowTownInTile(), GrowTownWithBridge(), GrowTownWithExtraHouse(), MaskWireBits(), NeighbourHasReachableRoad(), BuildDocksToolbarWindow::OnPlacePresize(), SetWaterClassDependingOnSurroundings(), and TryPathReserve().

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

Adds an offset to a tile and check if we are still on the map.

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 113 of file map.cpp.

References _settings_game, GameSettings::construction, ConstructionSettings::freeform_edges, INVALID_TILE, MapMaxX(), MapMaxY(), TileDiffXY(), TileX(), and TileY().

Referenced by CountMapSquareAround(), DisasterTick_Big_Ufo_Destroyer(), DoPlaceMoreTrees(), FindStationsAroundTiles(), and PlaceTreeAtSameHeight().

static TileIndexDiff TileDiffXY | ( | int | x,
|  | int | y |
| ) |  |  | `[inline, static]`

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

This function calculate an offset value which can be added to an 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 185 of file map_func.h.

References MapSizeX().

Referenced by AITileList_IndustryAccepting::AITileList_IndustryAccepting(), AITileList_IndustryProducing::AITileList_IndustryProducing(), AIRoad::CanBuildConnectedRoadPartsHere(), CanExpandRailStation(), ChangeIndustryProduction(), CheckIfCanLevelIndustryPlatform(), CmdBuildBridge(), CmdBuildRailStation(), CmdBuildShipDepot(), CmdRemoveLongRoad(), CmdTerraformLand(), DestroyCompanyHQ(), Disaster_CoalMine_Init(), EnlargeCompanyHQ(), GetHouseNorthPart(), Station::GetPlatformLength(), GetReferenceTile(), GetStationAround(), GetTileMaxZ(), GetTileSlope(), GetTileZ(), GUIPlaceProcDragXY(), MakeCompanyHQ(), MakeTownHouse(), Station::MarkTilesDirty(), NormaliseTileOffset(), IndustryViewWindow::OnClick(), AITile::PlantTreeRectangle(), TerraformAddDirtyTileAround(), and TileAddWrap().

static TileIndexDiffC TileIndexDiffCByDiagDir | ( | DiagDirection | dir | ) | `[inline, static]`

Returns the TileIndexDiffC offset from a DiagDirection.

Parameters:

  | dir | The given direction

Returns:
  The offset as TileIndexDiffC value

Definition at line 271 of file map_func.h.

References _tileoffs_by_diagdir, DIAGDIR_END, and IsValidDiagDirection().

static TileIndexDiffC TileIndexDiffCByDir | ( | Direction | dir | ) | `[inline, static]`

Returns the TileIndexDiffC offset from a Direction.

Parameters:

  | dir | The given direction

Returns:
  The offset as TileIndexDiffC value

Definition at line 285 of file map_func.h.

References _tileoffs_by_dir, DIR_END, and IsValidDirection().

Referenced by TileLoop_Water().

static TileIndexDiffC TileIndexToTileIndexDiffC | ( | TileIndex | tile_a,
|  | TileIndex | tile_b |
| ) |  |  | `[inline, static]`

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 319 of file map_func.h.

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

Referenced by GetTownRoadGridElement(), and TownLayoutAllowsHouseHere().

static TileIndexDiff TileOffsByDiagDir | ( | DiagDirection | dir | ) | `[inline, static]`

Convert a DiagDirection to a TileIndexDiff.

Parameters:

  | dir | The DiagDirection

Returns:
  The resulting TileIndexDiff

See also:
  TileIndexDiffCByDiagDir

Definition at line 367 of file map_func.h.

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

Referenced by AIBridge::_BuildBridgeRoad1(), AIBridge::_BuildBridgeRoad2(), AITunnel::_BuildTunnelRoad1(), AITunnel::_BuildTunnelRoad2(), CFollowTrackT< Ttr_type_, VehicleType, T90deg_turns_allowed_, Tmask_reserved_tracks >::CanEnterNewTile(), CheckFree2x2Area(), RoadStop::Entry::CheckIntegrity(), CheckTownBuild2House(), CheckTownBuild2x2House(), RoadStop::ClearDriveThrough(), CmdBuildDock(), CmdBuildLongRoad(), CmdBuildRailWaypoint(), CmdBuildRoad(), CmdBuildTunnel(), CmdConvertRail(), Disaster_CoalMine_Init(), DisasterTick_Submarine(), DoBuildShiplift(), DrawCatenaryRailway(), ExploreSegment(), ExtendTrainReservation(), FixOwnerOfRailTrack(), CFollowTrackT< Ttr_type_, VehicleType, T90deg_turns_allowed_, Tmask_reserved_tracks >::FollowTileExit(), FollowTrainReservation(), GetBridgeEnd(), AIRoad::GetDriveThroughBackTile(), GetOtherTunnelEnd(), AITunnel::GetOtherTunnelEnd(), Station::GetPlatformLength(), AIRail::GetRailDepotFrontTile(), AIRoad::GetRoadDepotFrontTile(), AIRoad::GetRoadStationFrontTile(), GetTrainForReservation(), GrowTownWithBridge(), CYapfCostRailT< Types >::IsAnyStationTileReserved(), IsNeighborRoadTile(), IsTunnelInWayDir(), MakeDock(), RoadStop::MakeDriveThrough(), NPFRoadVehicleChooseTrack(), NPFSaveTargetData(), NPFShipChooseTrack(), CYapfCostRoadT< Types >::OneTileCost(), OPFShipChooseTrack(), RoadStop::Entry::Rebuild(), RemoveDock(), RemoveRoad(), CYapfReserveTrack< Types >::ReserveRailStationPlatform(), SetRailStationPlatformReservation(), TileAddByDiagDir(), TrainApproachingCrossing(), TrainApproachingCrossingTile(), TrainCheckIfLineEnds(), CYapfReserveTrack< Types >::UnreserveSingleTrack(), and UpdateSignalsInBuffer().

static TileIndexDiff TileOffsByDir | ( | Direction | dir | ) | `[inline, static]`

Convert a Direction to a TileIndexDiff.

Parameters:

  | dir | The direction to convert from

Returns:
  The resulting TileIndexDiff

Definition at line 381 of file map_func.h.

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

Referenced by CircularTileSearch(), FindStationsNearby(), IsWateredTile(), and MarkCanalsAndRiversAroundDirty().

static uint TileX | ( | TileIndex | tile | ) | `[inline, 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 205 of file map_func.h.

References MapMaxX().

Referenced by AIRoad::_BuildRoadInternal(), AIRoad::_BuildRoadStationInternal(), TileArea::Add(), AddTileIndexDiffCWrap(), AircraftController(), AircraftGetEntryPoint(), AlignTileToGrid(), AIRoad::AreRoadTilesConnected(), AIBridge::BuildBridge(), AIRail::BuildRail(), AIRail::BuildRailDepot(), AIRoad::BuildRoadDepot(), AIRail::BuildSignal(), AIMarine::BuildWaterDepot(), CalcClosestStationTile(), CalcHeightdiff(), CanExpandRailStation(), CheckIfCanLevelIndustryPlatform(), CircularTileSearch(), TileArea::ClampToMap(), CmdBuildAircraft(), CmdBuildBridge(), CmdBuildLongRoad(), CmdBuildRailVehicle(), CmdBuildRailWagon(), CmdBuildRoadVeh(), CmdBuildShip(), CmdBuildTunnel(), CmdClearArea(), CmdConvertRail(), CmdPlaceSign(), CmdRemoveLongRoad(), CommonRaiseLowerBigLand(), DiagdirBetweenTiles(), Disaster_Small_Ufo_Init(), Disaster_Zeppeliner_Init(), DisasterTick_Aircraft(), DisasterTick_Big_Ufo(), DisasterTick_Ufo(), DistanceFromEdge(), DistanceManhattan(), DistanceMax(), DistanceMaxPlusManhattan(), DistanceSquare(), DoCommandP(), DrawTileSelection(), SmallMapWindow::DrawTowns(), FindIndustryToDeliver(), FindStationsNearby(), GetAcceptanceAroundTiles(), GetClosestWaterDistance(), GetDriveableTrackdirBits(), GetMinimalAirportDistanceToTile(), AIRoad::GetNeighbourRoadCount(), GetPCPElevation(), GetProductionAroundTiles(), GetRelativePosition(), AIRail::GetSignalType(), GetTileMaxZ(), GetTileSlope(), AIMap::GetTileX(), GetTileZ(), GetTunnelBridgeLength(), GrayscaleToMapHeights(), GrowTownWithBridge(), GUIPlaceProcDragXY(), HouseGetVariable(), Town::InitializeLayout(), InitializeWindowViewport(), TileArea::Intersects(), IsTileAlignedToGrid(), IsTunnelInWay(), MarkTileDirtyByTile(), NPFDistanceTrack(), NPFHash(), WaypointWindow::OnInvalidateData(), CYapfDestinationTileRoadT< Types >::PfCalcEstimate(), CYapfDestinationTileOrStationRailT< Types >::PfCalcEstimate(), CYapfDestinationTileT< Types >::PfCalcEstimate(), AIRail::RemoveRail(), AIRoad::RemoveRoad(), AIRoad::RemoveRoadFull(), AIRail::RemoveSignal(), SetTileType(), SetWaterClassDependingOnSurroundings(), ShowBuildBridgeWindow(), SimulateDrag(), SwapDirection(), TerraformAddDirtyTileAround(), TerraformTileHeight(), TgenSetTileHeight(), TileAddWrap(), TileArea::TileArea(), TileIndexToTileIndexDiffC(), TileStr(), TownLayoutAllows2x2HouseHere(), Waypoint::UpdateVirtCoord(), Town::UpdateVirtCoord(), Station::UpdateVirtCoord(), VehicleFromPos(), VpSelectTilesWithMethod(), VpSetPresizeRange(), and VpStartPlaceSizing().

static TileIndex TileXY | ( | uint | x,
|  | uint | y |
| ) |  |  | `[inline, 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 169 of file map_func.h.

References MapLogX().

Referenced by _GenerateWorld(), TileArea::Add(), AddTileIndexDiffCWrap(), AITileList_StationType::AITileList_StationType(), AlignTileToGrid(), CalcClosestStationTile(), CanExpandRailStation(), CheckSubsidised(), CircularTileSearch(), CmdClearArea(), CmdConvertRail(), Disaster_Small_Ufo_Init(), SmallMapWindow::DrawSmallMapColumn(), FixSlopes(), FlatEmptyWorld(), GenerateLandscape(), GenerateTerrainPerlin(), GenerateWorld(), GetAcceptanceAroundTiles(), GetClosestWaterDistance(), AIVehicle::GetLocation(), GetProductionAroundTiles(), AIMap::GetTileIndex(), GrayscaleToMapHeights(), Station::RecomputeIndustriesNear(), StationRect::ScanForStationTiles(), TerraformTileHeight(), TileArea::TileArea(), and UpdateStationAcceptance().

static uint TileY | ( | TileIndex | tile | ) | `[inline, 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 215 of file map_func.h.

References MapLogX().

Referenced by AIRoad::_BuildRoadInternal(), AIRoad::_BuildRoadStationInternal(), TileArea::Add(), AddTileIndexDiffCWrap(), AircraftController(), AircraftGetEntryPoint(), AlignTileToGrid(), AIRoad::AreRoadTilesConnected(), AIBridge::BuildBridge(), AIRail::BuildRail(), AIRail::BuildRailDepot(), AIRoad::BuildRoadDepot(), AIRail::BuildSignal(), AIMarine::BuildWaterDepot(), CalcClosestStationTile(), CanExpandRailStation(), CheckIfCanLevelIndustryPlatform(), CircularTileSearch(), TileArea::ClampToMap(), CmdBuildAircraft(), CmdBuildBridge(), CmdBuildLongRoad(), CmdBuildRailVehicle(), CmdBuildRailWagon(), CmdBuildRoadVeh(), CmdBuildShip(), CmdBuildTunnel(), CmdClearArea(), CmdConvertRail(), CmdPlaceSign(), CmdRemoveLongRoad(), CommonRaiseLowerBigLand(), DiagdirBetweenTiles(), Disaster_Helicopter_Init(), DisasterTick_Aircraft(), DisasterTick_Big_Ufo(), DisasterTick_Ufo(), DistanceFromEdge(), DistanceManhattan(), DistanceMax(), DistanceMaxPlusManhattan(), DistanceSquare(), DoCommandP(), DrawTileSelection(), SmallMapWindow::DrawTowns(), FindIndustryToDeliver(), FindStationsNearby(), GetAcceptanceAroundTiles(), GetClosestWaterDistance(), GetDriveableTrackdirBits(), GetMinimalAirportDistanceToTile(), AIRoad::GetNeighbourRoadCount(), GetPCPElevation(), GetProductionAroundTiles(), GetRelativePosition(), AIRail::GetSignalType(), GetTileMaxZ(), GetTileSlope(), AIMap::GetTileY(), GetTileZ(), GetTunnelBridgeLength(), GrayscaleToMapHeights(), GrowTownWithBridge(), GUIPlaceProcDragXY(), HouseGetVariable(), Town::InitializeLayout(), InitializeWindowViewport(), TileArea::Intersects(), IsTileAlignedToGrid(), IsTunnelInWay(), MarkTileDirtyByTile(), NPFDistanceTrack(), NPFHash(), WaypointWindow::OnInvalidateData(), CYapfDestinationTileRoadT< Types >::PfCalcEstimate(), CYapfDestinationTileOrStationRailT< Types >::PfCalcEstimate(), CYapfDestinationTileT< Types >::PfCalcEstimate(), AIRail::RemoveRail(), AIRoad::RemoveRoad(), AIRoad::RemoveRoadFull(), AIRail::RemoveSignal(), SetTileType(), SetWaterClassDependingOnSurroundings(), ShowBuildBridgeWindow(), SimulateDrag(), SwapDirection(), TerraformAddDirtyTileAround(), TerraformTileHeight(), TgenSetTileHeight(), TileAddWrap(), TileArea::TileArea(), TileIndexToTileIndexDiffC(), TileStr(), TownLayoutAllows2x2HouseHere(), Waypoint::UpdateVirtCoord(), Town::UpdateVirtCoord(), Station::UpdateVirtCoord(), VehicleFromPos(), VpSelectTilesWithMethod(), VpSetPresizeRange(), and VpStartPlaceSizing().

static TileIndexDiff ToTileIndexDiff | ( | TileIndexDiffC | tidc | ) | `[inline, static]`

Return the offset between to 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 230 of file map_func.h.

References MapLogX(), TileIndexDiffC::x, and TileIndexDiffC::y.

Referenced by CalcHeightdiff(), CmdBuildAirport(), CmdBuildDock(), CmdRailTrackHelper(), CmdSignalTrackHelper(), Ship::GetOrderStationLocation(), GrowTown(), TerraformTileHeight(), TileOffsByDiagDir(), and TileOffsByDir().

## Variable Documentation

Tile* _m

Pointer to the tile-array.

This variable points to the tile-array which contains the tiles of the map.

Definition at line 30 of file map.cpp.

Referenced by AddClearCounter(), AddClearDensity(), AddTreeCount(), AddTreeCounter(), AddTreeGrowth(), ClearSingleBridgeMiddle(), ClearSnow(), GetBridgeAxis(), GetBridgeType(), GetCleanHouseType(), GetCleanIndustryGfx(), GetClearCounter(), GetClearDensity(), GetCompanyHQSection(), GetCompanyHQSize(), GetCustomStationSpecIndex(), GetDepotIndex(), GetDisallowedRoadDirections(), GetFenceSE(), GetFenceSW(), GetFieldType(), GetHouseAge(), GetHouseAnimationFrame(), GetHouseBuildingStage(), GetHouseConstructionTick(), GetHouseRandomBits(), GetHouseTriggers(), GetIndustryAnimationLoop(), GetIndustryAnimationState(), GetIndustryConstructionCounter(), GetIndustryConstructionStage(), GetIndustryIndex(), GetIndustryIndexOfField(), GetIndustryTriggers(), GetLiftPosition(), GetPresentSignals(), GetRailDepotDirection(), GetRailReservationTrackBits(), GetRailTileType(), GetRailType(), GetRawClearGround(), GetSignalStates(), GetStationGfx(), GetStationIndex(), GetStationTileRandomBits(), GetStationType(), GetStatueTownID(), GetTileOwner(), GetTileType(), GetTownIndex(), GetTrackBits(), GetTreeCount(), GetTreeCounter(), GetTreeDensity(), GetTreeGround(), GetTreeGrowth(), GetTreeType(), GetTropicZone(), GetTunnelBridgeDirection(), GetTunnelBridgeTransportType(), GetUnmovableType(), HasCrossingReservation(), HasDepotReservation(), HasStationReservation(), HasTunnelBridgeReservation(), IncHouseConstructionTick(), IncrementHouseAge(), IsBridge(), IsBridgeAbove(), IsCompanyHQ(), IsCustomStationSpecIndex(), IsHouseCompleted(), IsIndustryCompleted(), IsSnowTile(), IsTunnel(), MakeBridgeRamp(), MakeClear(), MakeField(), MakeHouseTile(), MakeIndustry(), MakeRailTunnel(), MakeRoadTunnel(), MakeSnow(), MakeStation(), MakeStatue(), MakeTree(), MakeUnmovable(), MakeVoid(), MakeWater(), MoveWaypointsToBaseStations(), ResetHouseAge(), ResetIndustryConstructionStage(), SetBridgeMiddle(), SetClearCounter(), SetClearDensity(), SetClearGroundDensity(), SetCompanyHQSection(), SetCompanyHQSize(), SetCrossingReservation(), SetCustomStationSpecIndex(), SetDepotReservation(), SetDisallowedRoadDirections(), SetFenceSE(), SetFenceSW(), SetFieldType(), SetHasSignals(), SetHouseAnimationFrame(), SetHouseCompleted(), SetHouseRandomBits(), SetHouseTriggers(), SetHouseType(), SetIndustryAnimationLoop(), SetIndustryAnimationState(), SetIndustryCompleted(), SetIndustryConstructionCounter(), SetIndustryConstructionStage(), SetIndustryGfx(), SetIndustryIndexOfField(), SetIndustryTriggers(), SetLiftPosition(), SetPresentSignals(), SetRailStationReservation(), SetRailType(), SetSignalStates(), SetStationGfx(), SetStationTileRandomBits(), SetTileHeight(), SetTileOwner(), SetTileType(), SetTownIndex(), SetTrackBits(), SetTrackReservation(), SetTreeCounter(), SetTreeGroundDensity(), SetTreeGrowth(), SetTropicZone(), SetTunnelBridgeReservation(), SetWaterClassDependingOnSurroundings(), TileHeight(), and CrashLog::WriteSavegame().

TileExtended* _me

Pointer to the extended tile-array.

This variable points to the extended tile-array which contains the tiles of the map.

Definition at line 31 of file map.cpp.

Referenced by DecHouseProcessingTime(), GetHouseProcessingTime(), GetIndustryRandomBits(), GetLiftDestination(), GetStationAnimationFrame(), HaltLift(), HasTunnelBridgeSnowOrDesert(), LiftHasDestination(), MakeBridgeRamp(), MakeClear(), MakeField(), MakeHouseTile(), MakeRailTunnel(), MakeRoadTunnel(), MakeStation(), MakeTree(), MakeUnmovable(), MakeVoid(), MakeWater(), SetHouseProcessingTime(), SetIndustryRandomBits(), SetLiftDestination(), SetStationAnimationFrame(), and SetTunnelBridgeSnowOrDesert().