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

Inheritance diagram for AIEngine:

Static Public Member Functions
static bool	IsValidEngine (EngineID engine_id)
	Checks whether the given engine type is valid. More...

static bool	IsBuildable (EngineID engine_id)
	Checks whether the given engine type is buildable for a company. More...

static std::optional< std::string >	GetName (EngineID engine_id)
	Get the name of an engine. More...

static CargoID	GetCargoType (EngineID engine_id)
	Get the cargo-type of an engine. More...

static bool	CanRefitCargo (EngineID engine_id, CargoID cargo_id)
	Check if the cargo of an engine can be refitted to your requested. More...

static bool	CanPullCargo (EngineID engine_id, CargoID cargo_id)
	Check if the engine can pull a wagon with the given cargo. More...

static SQInteger	GetCapacity (EngineID engine_id)
	Get the capacity of an engine. More...

static SQInteger	GetReliability (EngineID engine_id)
	Get the reliability of an engine. More...

static SQInteger	GetMaxSpeed (EngineID engine_id)
	Get the maximum speed of an engine. More...

static Money	GetPrice (EngineID engine_id)
	Get the new cost of an engine. More...

static SQInteger	GetMaxAge (EngineID engine_id)
	Get the maximum age of a brand new engine. More...

static Money	GetRunningCost (EngineID engine_id)
	Get the running cost of an engine. More...

static SQInteger	GetPower (EngineID engine_id)
	Get the power of an engine. More...

static SQInteger	GetWeight (EngineID engine_id)
	Get the weight of an engine. More...

static SQInteger	GetMaxTractiveEffort (EngineID engine_id)
	Get the maximum tractive effort of an engine. More...

static AIDate::Date	GetDesignDate (EngineID engine_id)
	Get the date this engine was designed. More...

static AIVehicle::VehicleType	GetVehicleType (EngineID engine_id)
	Get the type of an engine. More...

static bool	IsWagon (EngineID engine_id)
	Check if an engine is a wagon. More...

static bool	CanRunOnRail (EngineID engine_id, AIRail::RailType track_rail_type)
	Check if a train vehicle can run on a RailType. More...

static bool	HasPowerOnRail (EngineID engine_id, AIRail::RailType track_rail_type)
	Check if a train engine has power on a RailType. More...

static bool	CanRunOnRoad (EngineID engine_id, AIRoad::RoadType road_type)
	Check if a road vehicle can run on a RoadType. More...

static bool	HasPowerOnRoad (EngineID engine_id, AIRoad::RoadType road_type)
	Check if a road vehicle has power on a RoadType. More...

static AIRoad::RoadType	GetRoadType (EngineID engine_id)
	Get the RoadType of the engine. More...

static AIRail::RailType	GetRailType (EngineID engine_id)
	Get the RailType of the engine. More...

static bool	IsArticulated (EngineID engine_id)
	Check if the engine is articulated. More...

static AIAirport::PlaneType	GetPlaneType (EngineID engine_id)
	Get the PlaneType of the engine. More...

static SQInteger	GetMaximumOrderDistance (EngineID engine_id)
	Get the maximum allowed distance between two orders for an engine. More...

Detailed Description

Class that handles all engine related functions.

Member Function Documentation

◆ CanPullCargo()

static bool AIEngine::CanPullCargo	(	EngineID	engine_id,
		CargoID	cargo_id
	)

static

Check if the engine can pull a wagon with the given cargo.

Parameters

engine_id	The engine to check.
cargo_id	The cargo to check.

Precondition: IsValidEngine(engine_id).; GetVehicleType(engine_id) == AIVehicle::VT_RAIL.; AICargo::IsValidCargo(cargo_id).

Returns: True if the engine can pull wagons carrying this cargo.

Note: This function is not exhaustive; a true here does not mean that the vehicle can pull the wagons, a false does mean it can't.

◆ CanRefitCargo()

static bool AIEngine::CanRefitCargo	(	EngineID	engine_id,
		CargoID	cargo_id
	)

static

Check if the cargo of an engine can be refitted to your requested.

If the engine already allows this cargo, the function also returns true. In case of articulated vehicles the function decides whether at least one part can carry the cargo.

Parameters

engine_id	The engine to check for refitting.
cargo_id	The cargo to check for refitting.

Precondition: IsValidEngine(engine_id).; AICargo::IsValidCargo(cargo_id).

Returns: True if the engine can carry this cargo, either via refit, or by default.

◆ CanRunOnRail()

static bool AIEngine::CanRunOnRail	(	EngineID	engine_id,
		AIRail::RailType	track_rail_type
	)

static

Check if a train vehicle can run on a RailType.

Parameters

engine_id	The engine to check.
track_rail_type	The type you want to check.

Precondition: IsValidEngine(engine_id).; GetVehicleType(engine_id) == AIVehicle::VT_RAIL.; AIRail::IsRailTypeAvailable(track_rail_type).

Returns: Whether an engine of type 'engine_id' 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 HasPowerOnRail for that.

◆ CanRunOnRoad()

static bool AIEngine::CanRunOnRoad	(	EngineID	engine_id,
		AIRoad::RoadType	road_type
	)

static

Check if a road vehicle can run on a RoadType.

Parameters

engine_id	The engine to check.
road_type	Another RoadType.

Precondition: IsValidEngine(engine_id).; GetVehicleType(engine_id) == AIVehicle::VT_ROAD.; AIRoad::IsRoadTypeAvailable(road_type).

Returns: Whether an engine of type 'engine_id' can run on 'road_type'.

◆ GetCapacity()

static SQInteger AIEngine::GetCapacity ( EngineID engine_id )

static

Get the capacity of an engine.

In case it can transport multiple cargoes, it returns the first/main.

Parameters

engine_id The engine to get the capacity of.

Precondition: IsValidEngine(engine_id).

Returns: The capacity of the engine.

◆ GetCargoType()

static CargoID AIEngine::GetCargoType ( EngineID engine_id )

static

Get the cargo-type of an engine.

In case it can transport multiple cargoes, it returns the first/main.

Parameters

engine_id The engine to get the cargo-type of.

Precondition: IsValidEngine(engine_id).

Returns: The cargo-type of the engine.

◆ GetDesignDate()

static AIDate::Date AIEngine::GetDesignDate ( EngineID engine_id )

static

Get the date this engine was designed.

Parameters

engine_id The engine to get the design date of.

Precondition: IsValidEngine(engine_id).

Returns: The date this engine was designed.

◆ GetMaxAge()

static SQInteger AIEngine::GetMaxAge ( EngineID engine_id )

static

Get the maximum age of a brand new engine.

Parameters

engine_id The engine to get the maximum age of.

Precondition: IsValidEngine(engine_id).

Returns: The maximum age of a new engine in days.

Note: Age is in days; divide by 366 to get per year.

◆ GetMaximumOrderDistance()

static SQInteger AIEngine::GetMaximumOrderDistance ( EngineID engine_id )

static

Get the maximum allowed distance between two orders for an engine.

The distance returned is a vehicle-type specific distance independent from other map distances, you may use the result of this function to compare it with the result of AIOrder::GetOrderDistance.

Parameters

engine_id The engine to get the max distance for.

Precondition: IsValidEngine(engine_id).

Returns: The maximum distance between two orders for the engine or 0 if the distance is unlimited.

Note: The unit of the order distances is unspecified and should not be compared with map distances

See also: AIOrder::GetOrderDistance

◆ GetMaxSpeed()

static SQInteger AIEngine::GetMaxSpeed ( EngineID engine_id )

static

Get the maximum speed of an engine.

Parameters

engine_id The engine to get the maximum speed of.

Precondition: IsValidEngine(engine_id).

Returns: The maximum speed the engine has.

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.

◆ GetMaxTractiveEffort()

static SQInteger AIEngine::GetMaxTractiveEffort ( EngineID engine_id )

static

Get the maximum tractive effort of an engine.

Parameters

engine_id The engine to get the maximum tractive effort of.

Precondition: IsValidEngine(engine_id).; (GetVehicleType(engine_id) == AIVehicle::VT_RAIL || GetVehicleType(engine_id) == AIVehicle::VT_ROAD) && !IsWagon(engine_id).

Returns: The maximum tractive effort of the engine in kN.

◆ GetName()

static std::optional<std::string> AIEngine::GetName ( EngineID engine_id )

static

Get the name of an engine.

Parameters

engine_id The engine to get the name of.

Precondition: IsValidEngine(engine_id).

Returns: The name the engine has.

◆ GetPlaneType()

static AIAirport::PlaneType AIEngine::GetPlaneType ( EngineID engine_id )

static

Get the PlaneType of the engine.

Parameters

engine_id The engine to get the PlaneType of.

Precondition: IsValidEngine(engine_id).; GetVehicleType(engine_id) == AIVehicle::VT_AIR.

Returns: The PlaneType the engine has.

◆ GetPower()

static SQInteger AIEngine::GetPower ( EngineID engine_id )

static

Get the power of an engine.

Parameters

engine_id The engine to get the power of.

Precondition: IsValidEngine(engine_id).; (GetVehicleType(engine_id) == AIVehicle::VT_RAIL || GetVehicleType(engine_id) == AIVehicle::VT_ROAD) && !IsWagon(engine_id).

Returns: The power of the engine in hp.

◆ GetPrice()

static Money AIEngine::GetPrice ( EngineID engine_id )

static

Get the new cost of an engine.

Parameters

engine_id The engine to get the new cost of.

Precondition: IsValidEngine(engine_id).

Returns: The new cost the engine has.

◆ GetRailType()

static AIRail::RailType AIEngine::GetRailType ( EngineID engine_id )

static

Get the RailType of the engine.

Parameters

engine_id The engine to get the RailType of.

Precondition: IsValidEngine(engine_id).; GetVehicleType(engine_id) == AIVehicle::VT_RAIL.

Returns: The RailType the engine has.

◆ GetReliability()

static SQInteger AIEngine::GetReliability ( EngineID engine_id )

static

Get the reliability of an engine.

The value is between 0 and 100, where 100 means 100% reliability (never breaks down) and 0 means 0% reliability (you most likely don't want to buy it).

Parameters

engine_id The engine to get the reliability of.

Precondition: IsValidEngine(engine_id).; GetVehicleType(engine_id) != AIVehicle::VT_TRAIN || !IsWagon(engine_id).

Returns: The reliability the engine has.

◆ GetRoadType()

static AIRoad::RoadType AIEngine::GetRoadType ( EngineID engine_id )

static

Get the RoadType of the engine.

Parameters

engine_id The engine to get the RoadType of.

Precondition: IsValidEngine(engine_id).; GetVehicleType(engine_id) == AIVehicle::VT_ROAD.

Returns: The RoadType the engine has.

◆ GetRunningCost()

static Money AIEngine::GetRunningCost ( EngineID engine_id )

static

Get the running cost of an engine.

Parameters

engine_id The engine to get the running cost of.

Precondition: IsValidEngine(engine_id).

Returns: The running cost of a vehicle per year.

Note: Cost is per year; divide by 365 to get per day.

◆ GetVehicleType()

static AIVehicle::VehicleType AIEngine::GetVehicleType ( EngineID engine_id )

static

Get the type of an engine.

Parameters

engine_id The engine to get the type of.

Precondition: IsValidEngine(engine_id).

Returns: The type the engine has.

◆ GetWeight()

static SQInteger AIEngine::GetWeight ( EngineID engine_id )

static

Get the weight of an engine.

Parameters

engine_id The engine to get the weight of.

Precondition: IsValidEngine(engine_id).; (GetVehicleType(engine_id) == AIVehicle::VT_RAIL || GetVehicleType(engine_id) == AIVehicle::VT_ROAD).

Returns: The weight of the engine in metric tons.

◆ HasPowerOnRail()

static bool AIEngine::HasPowerOnRail	(	EngineID	engine_id,
		AIRail::RailType	track_rail_type
	)

static

Check if a train engine has power on a RailType.

Parameters

engine_id	The engine to check.
track_rail_type	Another RailType.

Precondition: IsValidEngine(engine_id).; GetVehicleType(engine_id) == AIVehicle::VT_RAIL.; AIRail::IsRailTypeAvailable(track_rail_type).

Returns: Whether an engine of type 'engine_id' has power on 'track_rail_type'.

◆ HasPowerOnRoad()

static bool AIEngine::HasPowerOnRoad	(	EngineID	engine_id,
		AIRoad::RoadType	road_type
	)

static

Check if a road vehicle has power on a RoadType.

Parameters

engine_id	The engine to check.
road_type	Another RoadType.

Precondition: IsValidEngine(engine_id).; GetVehicleType(engine_id) == AIVehicle::VT_ROAD.; AIRoad::IsRoadTypeAvailable(road_type).

Returns: Whether an engine of type 'engine_id' has power on 'road_type'.

◆ IsArticulated()

static bool AIEngine::IsArticulated ( EngineID engine_id )

static

Check if the engine is articulated.

Parameters

engine_id The engine to check.

Precondition: IsValidEngine(engine_id).; GetVehicleType(engine_id) == AIVehicle::VT_ROAD || GetVehicleType(engine_id) == AIVehicle::VT_RAIL.

Returns: True if the engine is articulated.

◆ IsBuildable()

static bool AIEngine::IsBuildable ( EngineID engine_id )

static

Checks whether the given engine type is buildable for a company.

Parameters

engine_id The engine to check.

Returns: True if and only if the engine type is buildable.

◆ IsValidEngine()

static bool AIEngine::IsValidEngine ( EngineID engine_id )

static

Checks whether the given engine type is valid.

An engine is valid for a company if it has at least one vehicle of this engine or it's currently buildable.

Parameters

engine_id The engine to check.

Returns: True if and only if the engine type is valid.

◆ IsWagon()

static bool AIEngine::IsWagon ( EngineID engine_id )

static

Check if an engine is a wagon.

Parameters

engine_id The engine to check.

Precondition: IsValidEngine(engine_id).; GetVehicleType(engine_id) == AIVehicle::VT_RAIL.

Returns: Whether or not the engine is a wagon.

Static Public Member Functions

Detailed Description

Member Function Documentation

◆ CanPullCargo()

◆ CanRefitCargo()

◆ CanRunOnRail()

◆ CanRunOnRoad()

◆ GetCapacity()

◆ GetCargoType()

◆ GetDesignDate()

◆ GetMaxAge()

◆ GetMaximumOrderDistance()

◆ GetMaxSpeed()

◆ GetMaxTractiveEffort()

◆ GetName()

◆ GetPlaneType()

◆ GetPower()

◆ GetPrice()

◆ GetRailType()

◆ GetReliability()

◆ GetRoadType()

◆ GetRunningCost()

◆ GetVehicleType()

◆ GetWeight()

◆ HasPowerOnRail()

◆ HasPowerOnRoad()

◆ IsArticulated()

◆ IsBuildable()

◆ IsValidEngine()

◆ IsWagon()