Class that handles all rail related functions. More...

Inheritance diagram for AIRail:

Public Types
enum	ErrorMessages { ERR_RAIL_BASE , ERR_CROSSING_ON_ONEWAY_ROAD , ERR_UNSUITABLE_TRACK , ERR_RAILTYPE_DISALLOWS_CROSSING }
	All rail related error messages. More...

enum	RailType : int { RAILTYPE_INVALID }
	Types of rail known to the game. More...

enum	RailTrack { RAILTRACK_NE_SW , RAILTRACK_NW_SE , RAILTRACK_NW_NE , RAILTRACK_SW_SE , RAILTRACK_NW_SW , RAILTRACK_NE_SE , RAILTRACK_INVALID }
	A bitmap with all possible rail tracks on a tile. More...

enum	SignalType { SIGNALTYPE_NORMAL , SIGNALTYPE_ENTRY , SIGNALTYPE_EXIT , SIGNALTYPE_COMBO , SIGNALTYPE_PBS , SIGNALTYPE_PBS_ONEWAY , SIGNALTYPE_TWOWAY , SIGNALTYPE_NORMAL_TWOWAY , SIGNALTYPE_ENTRY_TWOWAY , SIGNALTYPE_EXIT_TWOWAY , SIGNALTYPE_COMBO_TWOWAY , SIGNALTYPE_NONE }
	Types of signal known to the game. More...

enum	BuildType { BT_TRACK , BT_SIGNAL , BT_DEPOT , BT_STATION , BT_WAYPOINT }
	Types of rail-related objects in the game. More...

Static Public Member Functions
static string	GetName (RailType rail_type)
	Get the name of a rail type. More...

static bool	IsRailTile (TileIndex tile)
	Checks whether the given tile is actually a tile with rail that can be used to traverse a tile. More...

static bool	IsLevelCrossingTile (TileIndex tile)
	Checks whether there is a road / rail crossing on a tile. More...

static bool	IsRailDepotTile (TileIndex tile)
	Checks whether the given tile is actually a tile with a rail depot. More...

static bool	IsRailStationTile (TileIndex tile)
	Checks whether the given tile is actually a tile with a rail station. More...

static bool	IsRailWaypointTile (TileIndex tile)
	Checks whether the given tile is actually a tile with a rail waypoint. More...

static bool	IsRailTypeAvailable (RailType rail_type)
	Check if a given RailType is available. More...

static RailType	GetCurrentRailType ()
	Get the current RailType set for all AIRail functions. More...

static void	SetCurrentRailType (RailType rail_type)
	Set the RailType for all further AIRail functions. More...

static bool	TrainCanRunOnRail (AIRail::RailType engine_rail_type, AIRail::RailType track_rail_type)
	Check if a train build for a rail type can run on another rail type. More...

static bool	TrainHasPowerOnRail (AIRail::RailType engine_rail_type, AIRail::RailType track_rail_type)
	Check if a train build for a rail type has power on another rail type. More...

static RailType	GetRailType (TileIndex tile)
	Get the RailType that is used on a tile. More...

static bool	ConvertRailType (TileIndex start_tile, TileIndex end_tile, AIRail::RailType convert_to)
	Convert the tracks on all tiles within a rectangle to another RailType. More...

static TileIndex	GetRailDepotFrontTile (TileIndex depot)
	Gets the tile in front of a rail depot. More...

static RailTrack	GetRailStationDirection (TileIndex tile)
	Gets the direction of a rail station tile. More...

static bool	BuildRailDepot (TileIndex tile, TileIndex front)
	Builds a rail depot. More...

static bool	BuildRailStation (TileIndex tile, RailTrack direction, int num_platforms, int platform_length, StationID station_id)
	Build a rail station. More...

static bool	BuildNewGRFRailStation (TileIndex tile, RailTrack direction, int num_platforms, int platform_length, StationID station_id, CargoID cargo_id, IndustryType source_industry, IndustryType goal_industry, int distance, bool source_station)
	Build a NewGRF rail station. More...

static bool	BuildRailWaypoint (TileIndex tile)
	Build a rail waypoint. More...

static bool	RemoveRailWaypointTileRectangle (TileIndex tile, TileIndex tile2, bool keep_rail)
	Remove all rail waypoint pieces within a rectangle on the map. More...

static bool	RemoveRailStationTileRectangle (TileIndex tile, TileIndex tile2, bool keep_rail)
	Remove all rail station platform pieces within a rectangle on the map. More...

static int	GetRailTracks (TileIndex tile)
	Get all RailTracks on the given tile. More...

static bool	BuildRailTrack (TileIndex tile, RailTrack rail_track)
	Build rail on the given tile. More...

static bool	RemoveRailTrack (TileIndex tile, RailTrack rail_track)
	Remove rail on the given tile. More...

static bool	AreTilesConnected (TileIndex from, TileIndex tile, TileIndex to)
	Check if a tile connects two adjacent tiles. More...

static bool	BuildRail (TileIndex from, TileIndex tile, TileIndex to)
	Build a rail connection between two tiles. More...

static bool	RemoveRail (TileIndex from, TileIndex tile, TileIndex to)
	Remove a rail connection between two tiles. More...

static SignalType	GetSignalType (TileIndex tile, TileIndex front)
	Get the SignalType of the signal on a tile or SIGNALTYPE_NONE if there is no signal. More...

static bool	BuildSignal (TileIndex tile, TileIndex front, SignalType signal)
	Build a signal on a tile. More...

static bool	RemoveSignal (TileIndex tile, TileIndex front)
	Remove a signal. More...

static Money	GetBuildCost (RailType railtype, BuildType build_type)
	Get the baseprice of building a rail-related object. More...

static int	GetMaxSpeed (RailType railtype)
	Get the maximum speed of trains running on this railtype. More...

static int	GetMaintenanceCostFactor (RailType railtype)
	Get the maintenance cost factor of a railtype. More...

Detailed Description

Class that handles all rail related functions.

Member Enumeration Documentation

◆ BuildType

enum AIRail::BuildType

Types of rail-related objects in the game.

Enumerator
BT_TRACK	Build a track.
BT_SIGNAL	Build a signal.
BT_DEPOT	Build a depot.
BT_STATION	Build a station.
BT_WAYPOINT	Build a rail waypoint.

◆ ErrorMessages

enum AIRail::ErrorMessages

All rail related error messages.

See also: ScriptErrorType

Enumerator
ERR_RAIL_BASE	Base for rail building / maintaining errors.
ERR_CROSSING_ON_ONEWAY_ROAD	One-way roads cannot have crossings.
ERR_UNSUITABLE_TRACK	No suitable track could be found.
ERR_RAILTYPE_DISALLOWS_CROSSING	This railtype cannot have crossings.

◆ RailTrack

enum AIRail::RailTrack

A bitmap with all possible rail tracks on a tile.

Enumerator
RAILTRACK_NE_SW	Track along the x-axis (north-east to south-west).
RAILTRACK_NW_SE	Track along the y-axis (north-west to south-east).
RAILTRACK_NW_NE	Track in the upper corner of the tile (north).
RAILTRACK_SW_SE	Track in the lower corner of the tile (south).
RAILTRACK_NW_SW	Track in the left corner of the tile (west).
RAILTRACK_NE_SE	Track in the right corner of the tile (east).
RAILTRACK_INVALID	Flag for an invalid track.

◆ RailType

enum AIRail::RailType : int

Types of rail known to the game.

Enumerator
RAILTYPE_INVALID	Invalid RailType.

◆ SignalType

enum AIRail::SignalType

Types of signal known to the game.

Enumerator
SIGNALTYPE_NORMAL	Block signal.
SIGNALTYPE_ENTRY	Entry presignal.
SIGNALTYPE_EXIT	Exit signal.
SIGNALTYPE_COMBO	Combo signal.
SIGNALTYPE_PBS	Normal PBS signal.
SIGNALTYPE_PBS_ONEWAY	No-entry PBS signal.
SIGNALTYPE_TWOWAY	Bit mask for twoway signal.
SIGNALTYPE_NORMAL_TWOWAY	Normal twoway signal.
SIGNALTYPE_ENTRY_TWOWAY	Entry twoway signal.
SIGNALTYPE_EXIT_TWOWAY	Exit twoway signal.
SIGNALTYPE_COMBO_TWOWAY	Combo twoway signal.
SIGNALTYPE_NONE	No signal.

Member Function Documentation

◆ AreTilesConnected()

static bool AIRail::AreTilesConnected	(	TileIndex	from,
		TileIndex	tile,
		TileIndex	to
	)

static

Check if a tile connects two adjacent tiles.

Parameters

from	The first tile to connect.
tile	The tile that is checked.
to	The second tile to connect.

Precondition: from != to.; AIMap::DistanceManhattan(from, tile) == 1.; AIMap::DistanceManhattan(to, tile) == 1.

Returns: True if 'tile' connects 'from' and 'to'.

◆ BuildNewGRFRailStation()

static bool AIRail::BuildNewGRFRailStation	(	TileIndex	tile,
		RailTrack	direction,
		int	num_platforms,
		int	platform_length,
		StationID	station_id,
		CargoID	cargo_id,
		IndustryType	source_industry,
		IndustryType	goal_industry,
		int	distance,
		bool	source_station
	)

static

Build a NewGRF rail station.

This calls callback 18 to let a NewGRF provide the station class / id to build, so we don't end up with only the default stations on the map. When no NewGRF provides a rail station, or an unbuildable rail station is returned by a NewGRF, this function will fall back to building a default non-NewGRF station as if AIRail::BuildRailStation was called.

Parameters

tile	Place to build the station.
direction	The direction to build the station.
num_platforms	The number of platforms to build.
platform_length	The length of each platform.
station_id	The station to join, AIStation::STATION_NEW or AIStation::STATION_JOIN_ADJACENT.
cargo_id	The CargoID of the cargo that will be transported from / to this station.
source_industry	The IndustryType of the industry you'll transport goods from, AIIndustryType::INDUSTRYTYPE_UNKNOWN or AIIndustryType::INDUSTRYTYPE_TOWN.
goal_industry	The IndustryType of the industry you'll transport goods to, AIIndustryType::INDUSTRYTYPE_UNKNOWN or AIIndustryType::INDUSTRYTYPE_TOWN.
distance	The manhattan distance you'll transport the cargo over.
source_station	True if this is the source station, false otherwise.

Precondition: IsRailTypeAvailable(GetCurrentRailType()).; AIMap::IsValidTile(tile).; direction == RAILTRACK_NW_SE || direction == RAILTRACK_NE_SW.; num_platforms > 0 && num_platforms <= 255.; platform_length > 0 && platform_length <= 255.; station_id == AIStation::STATION_NEW || station_id == AIStation::STATION_JOIN_ADJACENT || AIStation::IsValidStation(station_id).; AICargo::IsValidCargo(cargo_type); source_industry == AIIndustryType::INDUSTRYTYPE_UNKNOWN || source_industry == AIIndustryType::INDUSTRYTYPE_TOWN || AIIndustryType::IsValidIndustryType(source_industry).; goal_industry == AIIndustryType::INDUSTRYTYPE_UNKNOWN || goal_industry == AIIndustryType::INDUSTRYTYPE_TOWN || AIIndustryType::IsValidIndustryType(goal_industry).

Exceptions

AIError::ERR_OWNED_BY_ANOTHER_COMPANY
AIError::ERR_AREA_NOT_CLEAR
AIError::ERR_FLAT_LAND_REQUIRED
AIStation::ERR_STATION_TOO_CLOSE_TO_ANOTHER_STATION
AIStation::ERR_STATION_TOO_MANY_STATIONS
AIStation::ERR_STATION_TOO_MANY_STATIONS_IN_TOWN

Returns: Whether the station has been/can be build or not.

◆ BuildRail()

static bool AIRail::BuildRail	(	TileIndex	from,
		TileIndex	tile,
		TileIndex	to
	)

static

Build a rail connection between two tiles.

Parameters

from	The tile just before the tile to build on.
tile	The first tile to build on.
to	The tile just after the last tile to build on.

Precondition: from != to.; AIMap::DistanceManhattan(from, tile) == 1.; AIMap::DistanceManhattan(to, tile) >= 1.; (abs(abs(AIMap::GetTileX(to) - AIMap::GetTileX(tile)) - abs(AIMap::GetTileY(to) - AIMap::GetTileY(tile))) <= 1) || (AIMap::GetTileX(from) == AIMap::GetTileX(tile) && AIMap::GetTileX(tile) == AIMap::GetTileX(to)) || (AIMap::GetTileY(from) == AIMap::GetTileY(tile) && AIMap::GetTileY(tile) == AIMap::GetTileY(to)).; IsRailTypeAvailable(GetCurrentRailType()).

Exceptions

AIError::ERR_AREA_NOT_CLEAR
AIError::ERR_LAND_SLOPED_WRONG
AIRail::ERR_CROSSING_ON_ONEWAY_ROAD
AIRoad::ERR_ROAD_WORKS_IN_PROGRESS
AIError::ERR_ALREADY_BUILT

Note: Construction will fail if an obstacle is found between the start and end tiles.

Returns: Whether the rail has been/can be build or not.

◆ BuildRailDepot()

static bool AIRail::BuildRailDepot	(	TileIndex	tile,
		TileIndex	front
	)

static

Builds a rail depot.

Parameters

tile	Place to build the depot.
front	The tile exactly in front of the depot.

Precondition: AIMap::IsValidTile(tile).; AIMap::IsValidTile(front).; 'tile' is not equal to 'front', but in a straight line of it.; IsRailTypeAvailable(GetCurrentRailType()).

Exceptions

AIError::ERR_FLAT_LAND_REQUIRED
AIError::ERR_AREA_NOT_CLEAR

Returns: Whether the rail depot has been/can be build or not.

◆ BuildRailStation()

static bool AIRail::BuildRailStation	(	TileIndex	tile,
		RailTrack	direction,
		int	num_platforms,
		int	platform_length,
		StationID	station_id
	)

static

Build a rail station.

Parameters

tile	Place to build the station.
direction	The direction to build the station.
num_platforms	The number of platforms to build.
platform_length	The length of each platform.
station_id	The station to join, AIStation::STATION_NEW or AIStation::STATION_JOIN_ADJACENT.

Precondition: IsRailTypeAvailable(GetCurrentRailType()).; AIMap::IsValidTile(tile).; direction == RAILTRACK_NW_SE || direction == RAILTRACK_NE_SW.; num_platforms > 0 && num_platforms <= 255.; platform_length > 0 && platform_length <= 255.; station_id == AIStation::STATION_NEW || station_id == AIStation::STATION_JOIN_ADJACENT || AIStation::IsValidStation(station_id).

Exceptions

AIError::ERR_OWNED_BY_ANOTHER_COMPANY
AIError::ERR_AREA_NOT_CLEAR
AIError::ERR_FLAT_LAND_REQUIRED
AIStation::ERR_STATION_TOO_CLOSE_TO_ANOTHER_STATION
AIStation::ERR_STATION_TOO_MANY_STATIONS
AIStation::ERR_STATION_TOO_MANY_STATIONS_IN_TOWN

Returns: Whether the station has been/can be build or not.

◆ BuildRailTrack()

static bool AIRail::BuildRailTrack	(	TileIndex	tile,
		RailTrack	rail_track
	)

static

Build rail on the given tile.

Parameters

tile	The tile to build on.
rail_track	The RailTrack to build.

Precondition: AIMap::IsValidTile(tile).; IsRailTypeAvailable(GetCurrentRailType()).

Exceptions

AIError::ERR_AREA_NOT_CLEAR
AIError::ERR_LAND_SLOPED_WRONG
AIRoad::ERR_ROAD_WORKS_IN_PROGRESS
AIRail::ERR_CROSSING_ON_ONEWAY_ROAD
AIError::ERR_ALREADY_BUILT

Returns: Whether the rail has been/can be build or not.

Note: You can only build a single track with this function so do not use the values from RailTrack as bitmask.

◆ BuildRailWaypoint()

static bool AIRail::BuildRailWaypoint ( TileIndex tile )

static

Build a rail waypoint.

Parameters

tile	Place to build the waypoint.

Precondition: AIMap::IsValidTile(tile).; IsRailTile(tile).; GetRailTracks(tile) == RAILTRACK_NE_SW || GetRailTracks(tile) == RAILTRACK_NW_SE.; IsRailTypeAvailable(GetCurrentRailType()).

Exceptions

AIError::ERR_FLAT_LAND_REQUIRED

Returns: Whether the rail waypoint has been/can be build or not.

◆ BuildSignal()

static bool AIRail::BuildSignal	(	TileIndex	tile,
		TileIndex	front,
		SignalType	signal
	)

static

Build a signal on a tile.

Parameters

tile	The tile to build on.
front	The tile in front of the signal.
signal	The SignalType to build.

Precondition: AIMap::DistanceManhattan(tile, front) == 1.; IsRailTile(tile) && !IsRailStationTile(tile) && !IsRailWaypointTile(tile).

Exceptions

AIRail::ERR_UNSUITABLE_TRACK

Returns: Whether the signal has been/can be build or not.

◆ ConvertRailType()

static bool AIRail::ConvertRailType	(	TileIndex	start_tile,
		TileIndex	end_tile,
		AIRail::RailType	convert_to
	)

static

Convert the tracks on all tiles within a rectangle to another RailType.

Parameters

start_tile	One corner of the rectangle.
end_tile	The opposite corner of the rectangle.
convert_to	The RailType you want to convert the rails to.

Precondition: AIMap::IsValidTile(start_tile).; AIMap::IsValidTile(end_tile).; IsRailTypeAvailable(convert_to).

Exceptions

AIRail::ERR_UNSUITABLE_TRACK

Returns: Whether at least some rail has been converted successfully.

◆ GetBuildCost()

static Money AIRail::GetBuildCost	(	RailType	railtype,
		BuildType	build_type
	)

static

Get the baseprice of building a rail-related object.

Parameters

railtype	the railtype that is build (on)
build_type	the type of object to build

Precondition: IsRailTypeAvailable(railtype)

Returns: The baseprice of building the given object.

◆ GetCurrentRailType()

static RailType AIRail::GetCurrentRailType ( )

static

Get the current RailType set for all AIRail functions.

Returns: The RailType currently set.

◆ GetMaintenanceCostFactor()

static int AIRail::GetMaintenanceCostFactor ( RailType railtype )

static

Get the maintenance cost factor of a railtype.

Parameters

railtype The railtype to get the maintenance factor of.

Precondition: IsRailTypeAvailable(railtype)

Returns: Maintenance cost factor of the railtype.

◆ GetMaxSpeed()

static int AIRail::GetMaxSpeed ( RailType railtype )

static

Get the maximum speed of trains running on this railtype.

Parameters

railtype The railtype to get the maximum speed of.

Precondition: IsRailTypeAvailable(railtype)

Returns: The maximum speed trains can run on this railtype or 0 if there is no limit.

Note: The speed is in OpenTTD's internal speed unit. This is mph / 1.6, which is roughly km/h. To get km/h multiply this number by 1.00584.

◆ GetName()

static string AIRail::GetName ( RailType rail_type )

static

Get the name of a rail type.

Parameters

rail_type The rail type to get the name of.

Precondition: IsRailTypeAvailable(rail_type).

Returns: The name the rail type has.

Note: Since there is no string with only the name of the track, the text which is shown in the dropdown where you can chose a track type is returned. This means that the name could be something like "Maglev construction" instead of just "Maglev".

◆ GetRailDepotFrontTile()

static TileIndex AIRail::GetRailDepotFrontTile ( TileIndex depot )

static

Gets the tile in front of a rail depot.

Parameters

depot The rail depot tile.

Precondition: IsRailDepotTile(depot).

Returns: The tile in front of the depot.

◆ GetRailStationDirection()

static RailTrack AIRail::GetRailStationDirection ( TileIndex tile )

static

Gets the direction of a rail station tile.

Parameters

tile	The rail station tile.

Precondition: IsRailStationTile(tile).

Returns: The direction of the station (either RAILTRACK_NE_SW or RAILTRACK_NW_SE).

◆ GetRailTracks()

static int AIRail::GetRailTracks ( TileIndex tile )

static

Get all RailTracks on the given tile.

Note: A depot has no railtracks.

Parameters

tile	The tile to check.

Precondition: IsRailTile(tile).

Returns: A bitmask of RailTrack with all RailTracks on the tile.

◆ GetRailType()

static RailType AIRail::GetRailType ( TileIndex tile )

static

Get the RailType that is used on a tile.

Parameters

tile	The tile to check.

Precondition: AITile::HasTransportType(tile, AITile.TRANSPORT_RAIL).

Returns: The RailType that is used on a tile.

◆ GetSignalType()

static SignalType AIRail::GetSignalType	(	TileIndex	tile,
		TileIndex	front
	)

static

Get the SignalType of the signal on a tile or SIGNALTYPE_NONE if there is no signal.

Precondition: AIMap::DistanceManhattan(tile, front) == 1.

Parameters

tile	The tile that might have a signal.
front	The tile in front of 'tile'.

Returns: The SignalType of the signal on 'tile' facing to 'front'.

◆ IsLevelCrossingTile()

static bool AIRail::IsLevelCrossingTile ( TileIndex tile )

static

Checks whether there is a road / rail crossing on a tile.

Parameters

tile	The tile to check.

Returns: True if and only if there is a road / rail crossing.

◆ IsRailDepotTile()

static bool AIRail::IsRailDepotTile ( TileIndex tile )

static

Checks whether the given tile is actually a tile with a rail depot.

Parameters

tile	The tile to check.

Precondition: AIMap::IsValidTile(tile).

Returns: True if and only if the tile has a rail depot.

◆ IsRailStationTile()

static bool AIRail::IsRailStationTile ( TileIndex tile )

static

Checks whether the given tile is actually a tile with a rail station.

Parameters

tile	The tile to check.

Precondition: AIMap::IsValidTile(tile).

Returns: True if and only if the tile has a rail station.

◆ IsRailTile()

static bool AIRail::IsRailTile ( TileIndex tile )

static

Checks whether the given tile is actually a tile with rail that can be used to traverse a tile.

This excludes rail depots but includes stations and waypoints.

Parameters

tile	The tile to check.

Precondition: AIMap::IsValidTile(tile).

Returns: True if and only if the tile has rail.

◆ IsRailTypeAvailable()

static bool AIRail::IsRailTypeAvailable ( RailType rail_type )

static

Check if a given RailType is available.

Parameters

rail_type The RailType to check for.

Returns: True if this RailType can be used.

◆ IsRailWaypointTile()

static bool AIRail::IsRailWaypointTile ( TileIndex tile )

static

Checks whether the given tile is actually a tile with a rail waypoint.

Parameters

tile	The tile to check.

Precondition: AIMap::IsValidTile(tile).

Returns: True if and only if the tile has a rail waypoint.

◆ RemoveRail()

static bool AIRail::RemoveRail	(	TileIndex	from,
		TileIndex	tile,
		TileIndex	to
	)

static

Remove a rail connection between two tiles.

Parameters

from	The tile just before the tile to remove rail from.
tile	The first tile to remove rail from.
to	The tile just after the last tile to remove rail from.

Precondition: from != to.; AIMap::DistanceManhattan(from, tile) == 1.; AIMap::DistanceManhattan(to, tile) >= 1.; (abs(abs(AIMap::GetTileX(to) - AIMap::GetTileX(tile)) - abs(AIMap::GetTileY(to) - AIMap::GetTileY(tile))) <= 1) || (AIMap::GetTileX(from) == AIMap::GetTileX(tile) && AIMap::GetTileX(tile) == AIMap::GetTileX(to)) || (AIMap::GetTileY(from) == AIMap::GetTileY(tile) && AIMap::GetTileY(tile) == AIMap::GetTileY(to)).

Exceptions

AIRail::ERR_UNSUITABLE_TRACK

Returns: Whether the rail has been/can be removed or not.

◆ RemoveRailStationTileRectangle()

static bool AIRail::RemoveRailStationTileRectangle	(	TileIndex	tile,
		TileIndex	tile2,
		bool	keep_rail
	)

static

Remove all rail station platform pieces within a rectangle on the map.

Parameters

tile	One corner of the rectangle to clear.
tile2	The opposite corner.
keep_rail	Whether to keep the rail after removal.

Precondition: IsValidTile(tile).; IsValidTile(tile2).

Exceptions

AIRail::ERR_UNSUITABLE_TRACK

Returns: Whether at least one tile has been/can be cleared or not.

◆ RemoveRailTrack()

static bool AIRail::RemoveRailTrack	(	TileIndex	tile,
		RailTrack	rail_track
	)

static

Remove rail on the given tile.

Parameters

tile	The tile to remove rail from.
rail_track	The RailTrack to remove.

Precondition: AIMap::IsValidTile(tile).; (GetRailTracks(tile) & rail_track) != 0.

Exceptions

AIRail::ERR_UNSUITABLE_TRACK

Returns: Whether the rail has been/can be removed or not.

Note: You can only remove a single track with this function so do not use the values from RailTrack as bitmask.

◆ RemoveRailWaypointTileRectangle()

static bool AIRail::RemoveRailWaypointTileRectangle	(	TileIndex	tile,
		TileIndex	tile2,
		bool	keep_rail
	)

static

Remove all rail waypoint pieces within a rectangle on the map.

Parameters

tile	One corner of the rectangle to clear.
tile2	The opposite corner.
keep_rail	Whether to keep the rail after removal.

Precondition: IsValidTile(tile).; IsValidTile(tile2).

Exceptions

AIRail::ERR_UNSUITABLE_TRACK

Returns: Whether at least one tile has been/can be cleared or not.

◆ RemoveSignal()

static bool AIRail::RemoveSignal	(	TileIndex	tile,
		TileIndex	front
	)

static

Remove a signal.

Parameters

tile	The tile to remove the signal from.
front	The tile in front of the signal.

Precondition: AIMap::DistanceManhattan(tile, front) == 1.; GetSignalType(tile, front) != SIGNALTYPE_NONE.

Exceptions

AIRail::ERR_UNSUITABLE_TRACK

Returns: Whether the signal has been/can be removed or not.

◆ SetCurrentRailType()

static void AIRail::SetCurrentRailType ( RailType rail_type )

static

Set the RailType for all further AIRail functions.

Parameters

rail_type The RailType to set.

◆ TrainCanRunOnRail()

static bool AIRail::TrainCanRunOnRail	(	AIRail::RailType	engine_rail_type,
		AIRail::RailType	track_rail_type
	)

static

Check if a train build for a rail type can run on another rail type.

Parameters

engine_rail_type	The rail type the train is build for.
track_rail_type	The type you want to check.

Precondition: AIRail::IsRailTypeAvailable(engine_rail_type).; AIRail::IsRailTypeAvailable(track_rail_type).

Returns: Whether a train build for 'engine_rail_type' can run on 'track_rail_type'.

Note: Even if a train can run on a RailType that doesn't mean that it'll be able to power the train. Use TrainHasPowerOnRail for that.

◆ TrainHasPowerOnRail()

static bool AIRail::TrainHasPowerOnRail	(	AIRail::RailType	engine_rail_type,
		AIRail::RailType	track_rail_type
	)

static

Check if a train build for a rail type has power on another rail type.

Parameters

engine_rail_type	The rail type the train is build for.
track_rail_type	The type you want to check.

Precondition: AIRail::IsRailTypeAvailable(engine_rail_type).; AIRail::IsRailTypeAvailable(track_rail_type).

Returns: Whether a train build for 'engine_rail_type' has power on 'track_rail_type'.

Public Types

Static Public Member Functions

Detailed Description

Member Enumeration Documentation

◆ BuildType

◆ ErrorMessages

◆ RailTrack

◆ RailType

◆ SignalType

Member Function Documentation

◆ AreTilesConnected()

◆ BuildNewGRFRailStation()

◆ BuildRail()

◆ BuildRailDepot()

◆ BuildRailStation()

◆ BuildRailTrack()

◆ BuildRailWaypoint()

◆ BuildSignal()

◆ ConvertRailType()

◆ GetBuildCost()

◆ GetCurrentRailType()

◆ GetMaintenanceCostFactor()

◆ GetMaxSpeed()

◆ GetName()

◆ GetRailDepotFrontTile()

◆ GetRailStationDirection()

◆ GetRailTracks()

◆ GetRailType()

◆ GetSignalType()

◆ IsLevelCrossingTile()

◆ IsRailDepotTile()

◆ IsRailStationTile()

◆ IsRailTile()

◆ IsRailTypeAvailable()

◆ IsRailWaypointTile()

◆ RemoveRail()

◆ RemoveRailStationTileRectangle()

◆ RemoveRailTrack()

◆ RemoveRailWaypointTileRectangle()

◆ RemoveSignal()

◆ SetCurrentRailType()

◆ TrainCanRunOnRail()

◆ TrainHasPowerOnRail()