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

Inheritance diagram for AIRoad:

Public Types
enum	ErrorMessages { ERR_ROAD_BASE , ERR_ROAD_WORKS_IN_PROGRESS , ERR_ROAD_DRIVE_THROUGH_WRONG_DIRECTION , ERR_ROAD_CANNOT_BUILD_ON_TOWN_ROAD , ERR_ROAD_ONE_WAY_ROADS_CANNOT_HAVE_JUNCTIONS , ERR_ROADTYPE_DISALLOWS_CROSSING , ERR_UNSUITABLE_ROAD }
	All road related error messages. More...

enum	RoadType { ROADTYPE_ROAD , ROADTYPE_TRAM , ROADTYPE_INVALID }
	Types of road known to the game. More...

enum	RoadTramTypes : int { ROADTRAMTYPES_ROAD , ROADTRAMTYPES_TRAM }
	Road/tram types. More...

enum	RoadVehicleType { ROADVEHTYPE_BUS , ROADVEHTYPE_TRUCK }
	Type of road station. More...

enum	BuildType { BT_ROAD , BT_DEPOT , BT_BUS_STOP , BT_TRUCK_STOP }
	Types of road-related objects in the game. More...

Static Public Member Functions
static string	GetName (RoadType road_type)
	Get the name of a road type. More...

static RoadVehicleType	GetRoadVehicleTypeForCargo (CargoID cargo_type)
	Determines whether a busstop or a truckstop is needed to transport a certain cargo. More...

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

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

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

static bool	IsDriveThroughRoadStationTile (TileIndex tile)
	Checks whether the given tile is actually a tile with a drive through road station. More...

static bool	IsRoadTypeAvailable (RoadType road_type)
	Check if a given RoadType is available. More...

static RoadType	GetCurrentRoadType ()
	Get the current RoadType set for all AIRoad functions. More...

static void	SetCurrentRoadType (RoadType road_type)
	Set the RoadType for all further AIRoad functions. More...

static bool	RoadVehCanRunOnRoad (AIRoad::RoadType engine_road_type, AIRoad::RoadType road_road_type)
	Check if a road vehicle built for a road type can run on another road type. More...

static bool	RoadVehHasPowerOnRoad (AIRoad::RoadType engine_road_type, AIRoad::RoadType road_road_type)
	Check if a road vehicle built for a road type has power on another road type. More...

static bool	ConvertRoadType (TileIndex start_tile, TileIndex end_tile, RoadType road_type)
	Convert the road on all tiles within a rectangle to another RoadType. More...

static bool	HasRoadType (TileIndex tile, RoadType road_type)
	Check if a given tile has RoadType. More...

static bool	AreRoadTilesConnected (TileIndex tile_from, TileIndex tile_to)
	Checks whether the given tiles are directly connected, i.e. More...

static int	CanBuildConnectedRoadParts (AITile::Slope slope, Array< TileIndex > &&existing, TileIndex start, TileIndex end)
	Lookup function for building road parts independent of whether the "building on slopes" setting is enabled or not. More...

static int	CanBuildConnectedRoadPartsHere (TileIndex tile, TileIndex start, TileIndex end)
	Lookup function for building road parts independent of whether the "building on slopes" setting is enabled or not. More...

static int	GetNeighbourRoadCount (TileIndex tile)
	Count how many neighbours are road. More...

static TileIndex	GetRoadDepotFrontTile (TileIndex depot)
	Gets the tile in front of a road depot. More...

static TileIndex	GetRoadStationFrontTile (TileIndex station)
	Gets the tile in front of a road station. More...

static TileIndex	GetDriveThroughBackTile (TileIndex station)
	Gets the tile at the back of a drive through road station. More...

static bool	BuildRoad (TileIndex start, TileIndex end)
	Builds a road from the center of tile start to the center of tile end. More...

static bool	BuildOneWayRoad (TileIndex start, TileIndex end)
	Builds a one-way road from the center of tile start to the center of tile end. More...

static bool	BuildRoadFull (TileIndex start, TileIndex end)
	Builds a road from the edge of tile start to the edge of tile end (both included). More...

static bool	BuildOneWayRoadFull (TileIndex start, TileIndex end)
	Builds a one-way road from the edge of tile start to the edge of tile end (both included). More...

static bool	BuildRoadDepot (TileIndex tile, TileIndex front)
	Builds a road depot. More...

static bool	BuildRoadStation (TileIndex tile, TileIndex front, RoadVehicleType road_veh_type, StationID station_id)
	Builds a road bus or truck station. More...

static bool	BuildDriveThroughRoadStation (TileIndex tile, TileIndex front, RoadVehicleType road_veh_type, StationID station_id)
	Builds a drive-through road bus or truck station. More...

static bool	RemoveRoad (TileIndex start, TileIndex end)
	Removes a road from the center of tile start to the center of tile end. More...

static bool	RemoveRoadFull (TileIndex start, TileIndex end)
	Removes a road from the edge of tile start to the edge of tile end (both included). More...

static bool	RemoveRoadDepot (TileIndex tile)
	Removes a road depot. More...

static bool	RemoveRoadStation (TileIndex tile)
	Removes a road bus or truck station. More...

static Money	GetBuildCost (RoadType roadtype, BuildType build_type)
	Get the baseprice of building a road-related object. More...

static RoadTramTypes	GetRoadTramType (RoadType roadtype)
	Test if a road type is for road or trams. More...

static int	GetMaxSpeed (RoadType road_type)
	Get the maximum speed of road vehicles running on this roadtype. More...

static int	GetMaintenanceCostFactor (RoadType roadtype)
	Get the maintenance cost factor of a road type. More...

Detailed Description

Class that handles all road related functions.

Member Enumeration Documentation

◆ BuildType

enum AIRoad::BuildType

Types of road-related objects in the game.

Enumerator
BT_ROAD	Build a piece of road.
BT_DEPOT	Build a road depot.
BT_BUS_STOP	Build a bus stop.
BT_TRUCK_STOP	Build a truck stop.

◆ ErrorMessages

enum AIRoad::ErrorMessages

All road related error messages.

See also: ScriptErrorType

Enumerator
ERR_ROAD_BASE	Base for road building / maintaining errors.
ERR_ROAD_WORKS_IN_PROGRESS	Road works are in progress.
ERR_ROAD_DRIVE_THROUGH_WRONG_DIRECTION	Drive through is in the wrong direction.
ERR_ROAD_CANNOT_BUILD_ON_TOWN_ROAD	Drive through roads can't be build on town owned roads.
ERR_ROAD_ONE_WAY_ROADS_CANNOT_HAVE_JUNCTIONS	One way roads can't have junctions.
ERR_ROADTYPE_DISALLOWS_CROSSING	This roadtype cannot have crossings.
ERR_UNSUITABLE_ROAD	No suitable road could be found.

◆ RoadTramTypes

enum AIRoad::RoadTramTypes : int

Road/tram types.

Enumerator
ROADTRAMTYPES_ROAD	Road road types.
ROADTRAMTYPES_TRAM	Tram road types.

◆ RoadType

enum AIRoad::RoadType

Types of road known to the game.

Enumerator
ROADTYPE_ROAD	Build road objects.
ROADTYPE_TRAM	Build tram objects.
ROADTYPE_INVALID	Invalid RoadType.

◆ RoadVehicleType

enum AIRoad::RoadVehicleType

Type of road station.

Enumerator
ROADVEHTYPE_BUS	Build objects useable for busses and passenger trams.
ROADVEHTYPE_TRUCK	Build objects useable for trucks and cargo trams.

Member Function Documentation

◆ AreRoadTilesConnected()

static bool AIRoad::AreRoadTilesConnected	(	TileIndex	tile_from,
		TileIndex	tile_to
	)

static

Checks whether the given tiles are directly connected, i.e.

whether a road vehicle can travel from the center of the first tile to the center of the second tile.

Parameters

tile_from	The source tile.
tile_to	The destination tile.

Precondition: IsRoadTypeAvailable(GetCurrentRoadType()).; AIMap::IsValidTile(tile_from).; AIMap::IsValidTile(tile_to).; 'tile_from' and 'tile_to' are directly neighbouring tiles.

Returns: True if and only if a road vehicle can go from tile_from to tile_to.

◆ BuildDriveThroughRoadStation()

static bool AIRoad::BuildDriveThroughRoadStation	(	TileIndex	tile,
		TileIndex	front,
		RoadVehicleType	road_veh_type,
		StationID	station_id
	)

static

Builds a drive-through road bus or truck station.

Parameters

tile	Place to build the station.
front	A tile on the same axis with 'tile' as the station shall be oriented.
road_veh_type	Whether to build a truck or bus station.
station_id	The station to join, AIStation::STATION_NEW or AIStation::STATION_JOIN_ADJACENT.

Precondition: AIMap::IsValidTile(tile).; AIMap::IsValidTile(front).; 'tile' is not equal to 'front', but in a straight line of it.; station_id == AIStation::STATION_NEW || station_id == AIStation::STATION_JOIN_ADJACENT || AIStation::IsValidStation(station_id).; IsRoadTypeAvailable(GetCurrentRoadType()).

Exceptions

AIError::ERR_OWNED_BY_ANOTHER_COMPANY
AIError::ERR_AREA_NOT_CLEAR
AIError::ERR_FLAT_LAND_REQUIRED
AIRoad::ERR_ROAD_DRIVE_THROUGH_WRONG_DIRECTION
AIRoad::ERR_ROAD_CANNOT_BUILD_ON_TOWN_ROAD
AIError::ERR_VEHICLE_IN_THE_WAY
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.

◆ BuildOneWayRoad()

static bool AIRoad::BuildOneWayRoad	(	TileIndex	start,
		TileIndex	end
	)

static

Builds a one-way road from the center of tile start to the center of tile end.

If the road already exists, it is made one-way road. If the road already exists and is already one-way in this direction, the road is made two-way again. If the road already exists but is one-way in the other direction, it's made a 'no'-way road (it's forbidden to enter the tile from any direction).

Parameters

start	The start tile of the road.
end	The end tile of the road.

Precondition: 'start' is not equal to 'end'.; AIMap::IsValidTile(start).; AIMap::IsValidTile(end).; 'start' and 'end' are in a straight line, i.e. AIMap::GetTileX(start) == AIMap::GetTileX(end) or AIMap::GetTileY(start) == AIMap::GetTileY(end).; GetCurrentRoadType() == ROADTYPE_ROAD.

Exceptions

AIError::ERR_ALREADY_BUILT
AIError::ERR_LAND_SLOPED_WRONG
AIError::ERR_AREA_NOT_CLEAR
AIRoad::ERR_ROAD_ONE_WAY_ROADS_CANNOT_HAVE_JUNCTIONS
AIRoad::ERR_ROAD_WORKS_IN_PROGRESS
AIError::ERR_VEHICLE_IN_THE_WAY

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

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

◆ BuildOneWayRoadFull()

static bool AIRoad::BuildOneWayRoadFull	(	TileIndex	start,
		TileIndex	end
	)

static

Builds a one-way road from the edge of tile start to the edge of tile end (both included).

If the road already exists, it is made one-way road. If the road already exists and is already one-way in this direction, the road is made two-way again. If the road already exists but is one-way in the other direction, it's made a 'no'-way road (it's forbidden to enter the tile from any direction).

Parameters

start	The start tile of the road.
end	The end tile of the road.

Precondition: 'start' is not equal to 'end'.; AIMap::IsValidTile(start).; AIMap::IsValidTile(end).; 'start' and 'end' are in a straight line, i.e. AIMap::GetTileX(start) == AIMap::GetTileX(end) or AIMap::GetTileY(start) == AIMap::GetTileY(end).; GetCurrentRoadType() == ROADTYPE_ROAD.

Exceptions

AIError::ERR_ALREADY_BUILT
AIError::ERR_LAND_SLOPED_WRONG
AIError::ERR_AREA_NOT_CLEAR
AIRoad::ERR_ROAD_ONE_WAY_ROADS_CANNOT_HAVE_JUNCTIONS
AIRoad::ERR_ROAD_WORKS_IN_PROGRESS
AIError::ERR_VEHICLE_IN_THE_WAY

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

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

◆ BuildRoad()

static bool AIRoad::BuildRoad	(	TileIndex	start,
		TileIndex	end
	)

static

Builds a road from the center of tile start to the center of tile end.

Parameters

start	The start tile of the road.
end	The end tile of the road.

Precondition: 'start' is not equal to 'end'.; AIMap::IsValidTile(start).; AIMap::IsValidTile(end).; 'start' and 'end' are in a straight line, i.e. AIMap::GetTileX(start) == AIMap::GetTileX(end) or AIMap::GetTileY(start) == AIMap::GetTileY(end).; IsRoadTypeAvailable(GetCurrentRoadType()).

Exceptions

AIError::ERR_ALREADY_BUILT
AIError::ERR_LAND_SLOPED_WRONG
AIError::ERR_AREA_NOT_CLEAR
AIRoad::ERR_ROAD_ONE_WAY_ROADS_CANNOT_HAVE_JUNCTIONS
AIRoad::ERR_ROAD_WORKS_IN_PROGRESS
AIError::ERR_VEHICLE_IN_THE_WAY

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

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

◆ BuildRoadDepot()

static bool AIRoad::BuildRoadDepot	(	TileIndex	tile,
		TileIndex	front
	)

static

Builds a road 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.; IsRoadTypeAvailable(GetCurrentRoadType()).

Exceptions

AIError::ERR_FLAT_LAND_REQUIRED
AIError::ERR_AREA_NOT_CLEAR

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

◆ BuildRoadFull()

static bool AIRoad::BuildRoadFull	(	TileIndex	start,
		TileIndex	end
	)

static

Builds a road from the edge of tile start to the edge of tile end (both included).

Parameters

start	The start tile of the road.
end	The end tile of the road.

Precondition: 'start' is not equal to 'end'.; AIMap::IsValidTile(start).; AIMap::IsValidTile(end).; 'start' and 'end' are in a straight line, i.e. AIMap::GetTileX(start) == AIMap::GetTileX(end) or AIMap::GetTileY(start) == AIMap::GetTileY(end).; IsRoadTypeAvailable(GetCurrentRoadType()).

Exceptions

AIError::ERR_ALREADY_BUILT
AIError::ERR_LAND_SLOPED_WRONG
AIError::ERR_AREA_NOT_CLEAR
AIRoad::ERR_ROAD_ONE_WAY_ROADS_CANNOT_HAVE_JUNCTIONS
AIRoad::ERR_ROAD_WORKS_IN_PROGRESS
AIError::ERR_VEHICLE_IN_THE_WAY

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

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

◆ BuildRoadStation()

static bool AIRoad::BuildRoadStation	(	TileIndex	tile,
		TileIndex	front,
		RoadVehicleType	road_veh_type,
		StationID	station_id
	)

static

Builds a road bus or truck station.

Parameters

tile	Place to build the station.
front	The tile exactly in front of the station.
road_veh_type	Whether to build a truck or bus station.
station_id	The station to join, AIStation::STATION_NEW or AIStation::STATION_JOIN_ADJACENT.

Precondition: AIMap::IsValidTile(tile).; AIMap::IsValidTile(front).; 'tile' is not equal to 'front', but in a straight line of it.; station_id == AIStation::STATION_NEW || station_id == AIStation::STATION_JOIN_ADJACENT || AIStation::IsValidStation(station_id).; GetCurrentRoadType() == ROADTYPE_ROAD.

Exceptions

AIError::ERR_OWNED_BY_ANOTHER_COMPANY
AIError::ERR_AREA_NOT_CLEAR
AIError::ERR_FLAT_LAND_REQUIRED
AIRoad::ERR_ROAD_DRIVE_THROUGH_WRONG_DIRECTION
AIRoad::ERR_ROAD_CANNOT_BUILD_ON_TOWN_ROAD
AIError::ERR_VEHICLE_IN_THE_WAY
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.

◆ CanBuildConnectedRoadParts()

static int AIRoad::CanBuildConnectedRoadParts	(	AITile::Slope	slope,
		Array< TileIndex > &&	existing,
		TileIndex	start,
		TileIndex	end
	)

static

Lookup function for building road parts independent of whether the "building on slopes" setting is enabled or not.

This implementation can be used for abstract reasoning about a tile as it needs the slope and existing road parts of the tile as information.

Parameters

slope	The slope of the tile to examine.
existing	An array with the existing neighbours in the same format as "start" and "end", e.g. AIMap.GetTileIndex(0, 1). As a result of this all values of the existing array must be of type integer.
start	The tile from where the 'tile to be considered' will be entered. This is a relative tile, so valid parameters are: AIMap.GetTileIndex(0, 1), AIMap.GetTileIndex(0, -1), AIMap.GetTileIndex(1, 0) and AIMap.GetTileIndex(-1, 0).
end	The tile from where the 'tile to be considered' will be exited. This is a relative tile, sovalid parameters are: AIMap.GetTileIndex(0, 1), AIMap.GetTileIndex(0, -1), AIMap.GetTileIndex(1, 0) and AIMap.GetTileIndex(-1, 0).

Precondition: start != end.; slope must be a valid slope, i.e. one specified in AITile::Slope.

Note: Passing data that would be invalid in-game, e.g. existing containing road parts that can not be build on a tile with the given slope, does not necessarily means that -1 is returned, i.e. not all preconditions written here or assumed by the game are extensively checked to make sure the data entered is valid.

Returns: 0 when the build parts do not connect, 1 when they do connect once they are build or 2 when building the first part automatically builds the second part. -1 means the preconditions are not met.

◆ CanBuildConnectedRoadPartsHere()

static int AIRoad::CanBuildConnectedRoadPartsHere	(	TileIndex	tile,
		TileIndex	start,
		TileIndex	end
	)

static

Lookup function for building road parts independent of whether the "building on slopes" setting is enabled or not.

This implementation can be used for reasoning about an existing tile.

Parameters

tile	The tile to examine.
start	The tile from where "tile" will be entered.
end	The tile from where "tile" will be exited.

Precondition: start != end.; tile != start.; tile != end.; AIMap.IsValidTile(tile).; AIMap.IsValidTile(start).; AIMap.IsValidTile(end).; AIMap.GetDistanceManhattanToTile(tile, start) == 1.; AIMap.GetDistanceManhattanToTile(tile, end) == 1.

Returns: 0 when the build parts do not connect, 1 when they do connect once they are build or 2 when building the first part automatically builds the second part. -1 means the preconditions are not met.

◆ ConvertRoadType()

static bool AIRoad::ConvertRoadType	(	TileIndex	start_tile,
		TileIndex	end_tile,
		RoadType	road_type
	)

static

Convert the road on all tiles within a rectangle to another RoadType.

Parameters

start_tile	One corner of the rectangle.
end_tile	The opposite corner of the rectangle.
road_type	The RoadType you want to convert.

Precondition: AIMap::IsValidTile(start_tile).; AIMap::IsValidTile(end_tile).; IsRoadTypeAvailable(road_type).

Exceptions

AIRoad::ERR_UNSUITABLE_ROAD

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

◆ GetBuildCost()

static Money AIRoad::GetBuildCost	(	RoadType	roadtype,
		BuildType	build_type
	)

static

Get the baseprice of building a road-related object.

Parameters

roadtype	the roadtype of the object to build
build_type	the type of object to build

Precondition: IsRoadTypeAvailable(roadtype)

Returns: The baseprice of building the given object.

◆ GetCurrentRoadType()

static RoadType AIRoad::GetCurrentRoadType ( )

static

Get the current RoadType set for all AIRoad functions.

Returns: The RoadType currently set.

◆ GetDriveThroughBackTile()

static TileIndex AIRoad::GetDriveThroughBackTile ( TileIndex station )

static

Gets the tile at the back of a drive through road station.

So, one side of the drive through station is retrieved with GetTileInFrontOfStation, the other with this function.

Parameters

station The road station tile.

Precondition: IsDriveThroughRoadStationTile(station).

Returns: The tile at the back of the drive through road station.

◆ GetMaintenanceCostFactor()

static int AIRoad::GetMaintenanceCostFactor ( RoadType roadtype )

static

Get the maintenance cost factor of a road type.

Parameters

roadtype The road type to get the maintenance factor of.

Precondition: IsRoadTypeAvailable(roadtype)

Returns: Maintenance cost factor of the roadtype.

◆ GetMaxSpeed()

static int AIRoad::GetMaxSpeed ( RoadType road_type )

static

Get the maximum speed of road vehicles running on this roadtype.

Parameters

road_type The roadtype to get the maximum speed of.

Precondition: IsRoadTypeAvailable(road_type)

Returns: The maximum speed road vehicles can run on this roadtype or 0 if there is no limit.

Note: The speed is in OpenTTD's internal speed unit. This is mph / 0.8, which is roughly 0.5 km/h. To get km/h multiply this number by 2.01168.

◆ GetName()

static string AIRoad::GetName ( RoadType road_type )

static

Get the name of a road type.

Parameters

road_type The road type to get the name of.

Precondition: IsRoadTypeAvailable(road_type).

Returns: The name the road type has.

◆ GetNeighbourRoadCount()

static int AIRoad::GetNeighbourRoadCount ( TileIndex tile )

static

Count how many neighbours are road.

Parameters

tile	The tile to check on.

Precondition: AIMap::IsValidTile(tile).; IsRoadTypeAvailable(GetCurrentRoadType()).

Returns: 0 means no neighbour road; max value is 4.

◆ GetRoadDepotFrontTile()

static TileIndex AIRoad::GetRoadDepotFrontTile ( TileIndex depot )

static

Gets the tile in front of a road depot.

Parameters

depot The road depot tile.

Precondition: IsRoadDepotTile(depot).

Returns: The tile in front of the depot.

◆ GetRoadStationFrontTile()

static TileIndex AIRoad::GetRoadStationFrontTile ( TileIndex station )

static

Gets the tile in front of a road station.

Parameters

station The road station tile.

Precondition: IsRoadStationTile(station).

Returns: The tile in front of the road station.

◆ GetRoadTramType()

static RoadTramTypes AIRoad::GetRoadTramType ( RoadType roadtype )

static

Test if a road type is for road or trams.

Parameters

roadtype the roadtype to test.

Returns: RoadTramTypes of the road types.

◆ GetRoadVehicleTypeForCargo()

static RoadVehicleType AIRoad::GetRoadVehicleTypeForCargo ( CargoID cargo_type )

static

Determines whether a busstop or a truckstop is needed to transport a certain cargo.

Parameters

cargo_type The cargo to test.

Precondition: AICargo::IsValidCargo(cargo_type).

Returns: The road vehicle type needed to transport the cargo.

◆ HasRoadType()

static bool AIRoad::HasRoadType	(	TileIndex	tile,
		RoadType	road_type
	)

static

Check if a given tile has RoadType.

Parameters

tile	The tile to check.
road_type	The RoadType to check for.

Precondition: AIMap::IsValidTile(tile).; IsRoadTypeAvailable(road_type).

Returns: True if the tile contains a RoadType object.

◆ IsDriveThroughRoadStationTile()

static bool AIRoad::IsDriveThroughRoadStationTile ( TileIndex tile )

static

Checks whether the given tile is actually a tile with a drive through road station.

Parameters

tile	The tile to check.

Precondition: AIMap::IsValidTile(tile).; IsRoadTypeAvailable(GetCurrentRoadType()).

Returns: True if and only if the tile has a drive through road station.

◆ IsRoadDepotTile()

static bool AIRoad::IsRoadDepotTile ( TileIndex tile )

static

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

Parameters

tile	The tile to check.

Precondition: AIMap::IsValidTile(tile).; IsRoadTypeAvailable(GetCurrentRoadType()).

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

◆ IsRoadStationTile()

static bool AIRoad::IsRoadStationTile ( TileIndex tile )

static

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

Parameters

tile	The tile to check.

Precondition: AIMap::IsValidTile(tile).; IsRoadTypeAvailable(GetCurrentRoadType()).

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

◆ IsRoadTile()

static bool AIRoad::IsRoadTile ( TileIndex tile )

static

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

This excludes road depots and 'normal' road stations, but includes drive through stations.

Parameters

tile	The tile to check.

Precondition: AIMap::IsValidTile(tile).

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

◆ IsRoadTypeAvailable()

static bool AIRoad::IsRoadTypeAvailable ( RoadType road_type )

static

Check if a given RoadType is available.

Parameters

road_type The RoadType to check for.

Returns: True if this RoadType can be used.

◆ RemoveRoad()

static bool AIRoad::RemoveRoad	(	TileIndex	start,
		TileIndex	end
	)

static

Removes a road from the center of tile start to the center of tile end.

Parameters

start	The start tile of the road.
end	The end tile of the road.

Precondition: 'start' is not equal to 'end'.; AIMap::IsValidTile(start).; AIMap::IsValidTile(end).; 'start' and 'end' are in a straight line, i.e. AIMap::GetTileX(start) == AIMap::GetTileX(end) or AIMap::GetTileY(start) == AIMap::GetTileY(end).; IsRoadTypeAvailable(GetCurrentRoadType()).

Exceptions

AIError::ERR_OWNED_BY_ANOTHER_COMPANY
AIError::ERR_VEHICLE_IN_THE_WAY
AIRoad::ERR_ROAD_WORKS_IN_PROGRESS

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

◆ RemoveRoadDepot()

static bool AIRoad::RemoveRoadDepot ( TileIndex tile )

static

Removes a road depot.

Parameters

tile	Place to remove the depot from.

Precondition: AIMap::IsValidTile(tile).; Tile is a road depot.

Exceptions

AIError::ERR_OWNED_BY_ANOTHER_COMPANY
AIError::ERR_VEHICLE_IN_THE_WAY

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

◆ RemoveRoadFull()

static bool AIRoad::RemoveRoadFull	(	TileIndex	start,
		TileIndex	end
	)

static

Removes a road from the edge of tile start to the edge of tile end (both included).

Parameters

start	The start tile of the road.
end	The end tile of the road.

Precondition: 'start' is not equal to 'end'.; AIMap::IsValidTile(start).; AIMap::IsValidTile(end).; 'start' and 'end' are in a straight line, i.e. AIMap::GetTileX(start) == AIMap::GetTileX(end) or AIMap::GetTileY(start) == AIMap::GetTileY(end).; IsRoadTypeAvailable(GetCurrentRoadType()).

Exceptions

AIError::ERR_OWNED_BY_ANOTHER_COMPANY
AIError::ERR_VEHICLE_IN_THE_WAY
AIRoad::ERR_ROAD_WORKS_IN_PROGRESS

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

◆ RemoveRoadStation()

static bool AIRoad::RemoveRoadStation ( TileIndex tile )

static

Removes a road bus or truck station.

Parameters

tile	Place to remove the station from.

Precondition: AIMap::IsValidTile(tile).; Tile is a road station.

Exceptions

AIError::ERR_OWNED_BY_ANOTHER_COMPANY
AIError::ERR_VEHICLE_IN_THE_WAY

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

◆ RoadVehCanRunOnRoad()

static bool AIRoad::RoadVehCanRunOnRoad	(	AIRoad::RoadType	engine_road_type,
		AIRoad::RoadType	road_road_type
	)

static

Check if a road vehicle built for a road type can run on another road type.

Parameters

engine_road_type	The road type the road vehicle is built for.
road_road_type	The road type you want to check.

Precondition: AIRoad::IsRoadTypeAvailable(engine_road_type).; AIRoad::IsRoadTypeAvailable(road_road_type).

Returns: Whether a road vehicle built for 'engine_road_type' can run on 'road_road_type'.

◆ RoadVehHasPowerOnRoad()

static bool AIRoad::RoadVehHasPowerOnRoad	(	AIRoad::RoadType	engine_road_type,
		AIRoad::RoadType	road_road_type
	)

static

Check if a road vehicle built for a road type has power on another road type.

Parameters

engine_road_type	The road type the road vehicle is built for.
road_road_type	The road type you want to check.

Precondition: AIRoad::IsRoadTypeAvailable(engine_road_type).; AIRoad::IsRoadTypeAvailable(road_road_type).

Returns: Whether a road vehicle built for 'engine_road_type' has power on 'road_road_type'.

◆ SetCurrentRoadType()

static void AIRoad::SetCurrentRoadType ( RoadType road_type )

static

Set the RoadType for all further AIRoad functions.

Parameters

road_type The RoadType to set.

Public Types

Static Public Member Functions

Detailed Description

Member Enumeration Documentation

◆ BuildType

◆ ErrorMessages

◆ RoadTramTypes

◆ RoadType

◆ RoadVehicleType

Member Function Documentation

◆ AreRoadTilesConnected()

◆ BuildDriveThroughRoadStation()

◆ BuildOneWayRoad()

◆ BuildOneWayRoadFull()

◆ BuildRoad()

◆ BuildRoadDepot()

◆ BuildRoadFull()

◆ BuildRoadStation()

◆ CanBuildConnectedRoadParts()

◆ CanBuildConnectedRoadPartsHere()

◆ ConvertRoadType()

◆ GetBuildCost()

◆ GetCurrentRoadType()

◆ GetDriveThroughBackTile()

◆ GetMaintenanceCostFactor()

◆ GetMaxSpeed()

◆ GetName()

◆ GetNeighbourRoadCount()

◆ GetRoadDepotFrontTile()

◆ GetRoadStationFrontTile()

◆ GetRoadTramType()

◆ GetRoadVehicleTypeForCargo()

◆ HasRoadType()

◆ IsDriveThroughRoadStationTile()

◆ IsRoadDepotTile()

◆ IsRoadStationTile()

◆ IsRoadTile()

◆ IsRoadTypeAvailable()

◆ RemoveRoad()

◆ RemoveRoadDepot()

◆ RemoveRoadFull()

◆ RemoveRoadStation()

◆ RoadVehCanRunOnRoad()

◆ RoadVehHasPowerOnRoad()

◆ SetCurrentRoadType()