WormRailBuilder Class Reference

Overrides the rail pathfinder's _Cost function to add a penalty for level crossings. More...

Public Member Functions
function	GetTilesAroundTown (town_id, width, height)
	Get a TileList around a town.
function	BuildSingleRailStation (is_source, platform_length, route_data, station_data, rail_manager)
	Build a single (one-lane) rail station at a town or an industry.
function	CanBuildSingleRailStation (tile, direction, platform_length, station_data)
	Check whether a single rail station can be built at the given position.
function	BuildRailStation (is_source, lanes, platform_length, route_data, station_data, rail_manager)
	Build a rail station at a town or an industry.
function	CanBuildRailStation (tile, lanes, direction, platform_length, station_data)
	Determine whether a rail station can be built at a given place.
function	BuildRail (head1, head2, railbridges)
	Build a rail line between two given points.
function	InternalBuildRail (head1, head2, railbridges, recursiondepth)
	Build a rail line between two given points.
function	RetryRail (prevprev, pp1, pp2, pp3, head1, railbridges, recursiondepth)
	Retry building a rail track after it was interrupted.
function	BuildPassingLaneSection (near_source, train_length, station_data, rail_manager)
	Build a passing lane section between the current source and destination.
function	CanBuildPassingLaneSection (centre, direction, reverse, train_length)
	Determine whether a passing lane section can be built at a given position.
function	BuildAndStartTrains (number, length, engine, wagon, ordervehicle, group, cargo, station_data, engineblacklist)
	Build and start trains for the current route.
function	MailWagonWorkaround (mailwagon, firstwagon, trainengine, crg)
	A workaround for refitting the mail wagon separately.
function	RemoveRailLine (start_tile, rail_manager)
	Remove a continuous segment of rail track starting from a single point.
function	AreRailTilesConnected (tilefrom, tileto)
	Determine whether two tiles are connected with rail directly.
function	DeleteRailStation (sta, rail_manager)
	Delete a rail station together with the rail line.
function	ElectrifyRail (start_tile, rail_manager)
	Upgrade a segment of normal rail to electrified rail from a given starting point.
function	GetRailStationPlatformLength (sta)
	Get the platform length of a station.
function	AttachMoreWagons (vehicle, rail_manager)
	Attach more wagons to a train after it has been sent to the depot.

Static Public Member Functions
static function	ChooseWagon (cargo, blacklist)
	Choose a rail wagon for the given cargo.
static function	ChooseTrainEngine (cargo, distance, wagon, num_wagons, blacklist)
	Choose a train locomotive.
static function	TrainEngineValuator (engine, weight, max_speed, money)
	A valuator function for scoring train locomotives.

Detailed Description

Overrides the rail pathfinder's _Cost function to add a penalty for level crossings.

DISABLED. Now part of our pathfinder code.

function WormRailPathFinder::_Cost(path, new_tile, new_direction, self) { local cost = ::Rail._Cost(path, new_tile, new_direction, self); if (AITile.HasTransportType(new_tile, AITile.TRANSPORT_ROAD)) cost += self._cost_level_crossing; return cost; } Define the WormRailBuilder class which handles trains.

Member Function Documentation

function WormRailBuilder::AreRailTilesConnected	(	tilefrom	,
		tileto
	)

Determine whether two tiles are connected with rail directly.

Parameters

tilefrom	The first tile to check.
tileto	The second tile to check.

Returns

True if the two tiles are connected.

function WormRailBuilder::AttachMoreWagons	(	vehicle	,
		rail_manager
	)

Attach more wagons to a train after it has been sent to the depot.

Parameters

vehicle	The VehicleID of the train.
rail_manager	The WormRailManager class object.

function WormRailBuilder::BuildAndStartTrains	(	number	,
		length	,
		engine	,
		wagon	,
		ordervehicle	,
		group	,
		cargo	,
		station_data	,
		engineblacklist
	)

Build and start trains for the current route.

Parameters

number	The number of trains to be built.
length	The number of wagons to be attached to the train.
engine	The EngineID of the locomotive.
wagon	The EngineID of the wagons.
ordervehicle	The vehicle to share orders with. Null, if there is no such vehicle.
group	The vehicle group this train should be part of.
cargo	The cargo to transport.
station_data	A WormStation class object with info about the stations between which rail is being built.
engineblacklist	The blacklist of engines to which bad engines will be added.

Returns

True if at least one train was built.

function WormRailBuilder::BuildPassingLaneSection	(	near_source	,
		train_length	,
		station_data	,
		rail_manager
	)

Build a passing lane section between the current source and destination.

Builder class variables used: stasrc, stadst

Parameters

near_source	True if we're building the first passing lane section. (the one closer to the source station)
train_length	The maximum train length in tiles that should fit (should be at least 3).
station_data	A WormStation class object with info about the stations between which rail is being built.
rail_manager	The WormRailManager class object.

Returns

True if the construction succeeded.

function WormRailBuilder::BuildRail	(	head1	,
		head2	,
		railbridges
	)

Build a rail line between two given points.

Parameters

head1	The starting points of the rail line.
head2	The ending points of the rail line.
railbridges	The list of railbridges. If we need to build a bridge it will be added to this list.

Returns

True if the construction succeeded.

function WormRailBuilder::BuildRailStation	(	is_source	,
		lanes	,
		platform_length	,
		route_data	,
		station_data	,
		rail_manager
	)

Build a rail station at a town or an industry.

Parameters

is_source	True if we are building the source station.
lanes	The number of lanes (platforms). Currently only 1 or 2 is supported.
platform_length	The length of the proposed station's platform.
route_data	A WormRoute class object containing info about the route.
station_data	A WormStation class object containing info about the station.
rail_manager	The WormRailManager class object.

Returns

True if the construction succeeded.

Precondition

lanes > 0 and < 3; route_data, station_data and rail_manager should be valid (non null).

Todo:

Support more than 2 lanes.

function WormRailBuilder::BuildSingleRailStation	(	is_source	,
		platform_length	,
		route_data	,
		station_data	,
		rail_manager
	)

Build a single (one-lane) rail station at a town or an industry.

Builder class variables used: crg, src, dst, srcplace, dstplace, srcistown, dstistown, statile, stafront, depfront, frontfront, statop, stationdir Builder class variables set: stasrc, stadst, homedepot

Parameters

is_source	True if we are building the source station.
platform_length	The length of the new station's platform.
route_data	A WormRoute class object containing info about the route.
station_data	A WormStation class object containing info about the station.
rail_manager	The WormRailManager class object.

Returns

True if the construction succeeded.

function WormRailBuilder::CanBuildPassingLaneSection	(	centre	,
		direction	,
		reverse	,
		train_length
	)

Determine whether a passing lane section can be built at a given position.

Parameters

centre	The centre tile of the proposed passing lane section.
direction	The direction of the proposed passing lane section.
reverse	True if we are trying to build a flipped passing lane section.
train_length	The maximum train length in tiles that should fit (should be at least 3).

Returns

True if a passing lane section can be built.

Design of a passing lane

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/ /

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This means that we add one piece of straight track before and after the passing lane. This is done to make sure we don't get any 90 degree connections.

function WormRailBuilder::CanBuildRailStation	(	tile	,
		lanes	,
		direction	,
		platform_length	,
		station_data
	)

Determine whether a rail station can be built at a given place.

Parameters

tile	The tile to be checked.
lanes	The number of lanes (platforms). Currently only 1 or 2 is supported.
direction	The direction of the proposed station.
platform_length	The length of the proposed station's platform.
station_data	WormStation class object where the build info will be store (should be non null when called).

Returns

True if a double rail station can be built at the given position.

Todo:

Support more than 2 lanes.

Todo:

Why is this different in CanBuildSingleRailStation?

Todo:

Why is this different in CanBuildSingleRailStation?

Todo:

part of these can be merged, to be done after we know it's working

Todo:

generalize the different lanes so it will be easier to extend.

function WormRailBuilder::CanBuildSingleRailStation	(	tile	,
		direction	,
		platform_length	,
		station_data
	)

Check whether a single rail station can be built at the given position.

Builder class variables set: statop, stabotton, statile, stafront, depfront, frontfront

Parameters

tile	The tile to be checked.
direction	The direction of the proposed station.
platform_length	The length of the proposed station's platform.
station_data	WormStation class object where the build info will be store (should be non null when called).

Returns

True if a single rail station can be built at the given position.

function WormRailBuilder::ChooseTrainEngine ( cargo  , distance  , wagon  , num_wagons  , blacklist    )

static

Choose a train locomotive.

Parameters

cargo	The cargo to carry.
distance	The distance to be traveled.
wagon	The EngineID of the wagons to be pulled.
num_wagons	The number of wagons to be pulled.
blacklist	A list of engines that cannot be used.

Returns

The EngineID of the chosen locomotive, null if no suitable locomotive was found.

function WormRailBuilder::ChooseWagon ( cargo  , blacklist    )

static

Choose a rail wagon for the given cargo.

Parameters

cargo

The cargo which will be transported by te wagon.

Returns

The EngineID of the chosen wagon, null if no suitable wagon was found.

function WormRailBuilder::DeleteRailStation	(	sta	,
		rail_manager
	)

Delete a rail station together with the rail line.

Builder class variables used and set:

Parameters

sta	The StationID of the station to be deleted.
rail_manager	The WormRailManager class object.

function WormRailBuilder::ElectrifyRail	(	start_tile	,
		rail_manager
	)

Upgrade a segment of normal rail to electrified rail from a given starting point.

Tiles which are reachable by a train from a given starting point are electrified, including stations and depots. This function is not static.

Parameters

start_tile	The starting point from which rails are electrified.
rail_manager	The WormRailManager class object.

function WormRailBuilder::GetRailStationPlatformLength

(

sta

)

Get the platform length of a station.

Parameters

sta	The StationID of the station.

Returns

The length of the station's platform in tiles.

function WormRailBuilder::GetTilesAroundTown	(	town_id	,
		width	,
		height
	)

Get a TileList around a town.

Parameters

town_id	The TownID of the given town.
width	The width of the proposed station.
height	The height of the proposed station.

Returns

A TileList containing tiles around a town.

function WormRailBuilder::InternalBuildRail	(	head1	,
		head2	,
		railbridges	,
		recursiondepth
	)

Build a rail line between two given points.

Parameters

head1	The starting points of the rail line.
head2	The ending points of the rail line.
railbridges	The list of railbridges. If we need to build a bridge it will be added to this list.
recursiondepth	The recursion depth used to catch infinite recursions.

Returns

True if the construction succeeded.

Todo:

Can we determine bridge/tunnel costs in advance here (e.g. expensive bridge newgrf) Maybe also depend on railtype?

Todo:

Maybe also valuate on price of the bridge and depend on the max speed we need maybe + a little extra for when we upgrade trains...

function WormRailBuilder::MailWagonWorkaround	(	mailwagon	,
		firstwagon	,
		trainengine	,
		crg
	)

A workaround for refitting the mail wagon separately.

Parameters

mailwagon	The mail wagon to be refitted.
firstwagon	The wagon to which the mail wagon is attached.
trainengine	The locomotive of the train, used to move the wagons.
crg	The cargo which the mail wagon will be refitted to.

function WormRailBuilder::RemoveRailLine	(	start_tile	,
		rail_manager
	)

Remove a continuous segment of rail track starting from a single point.

This includes depots and stations, in all directions and braches. Basically the function deletes all rail tiles which are reachable by a train from the starting point. This function is not static.

Parameters

start_tile	The starting point of the rail.
rail_manager	The WormRailManager class object.

function WormRailBuilder::RetryRail	(	prevprev	,
		pp1	,
		pp2	,
		pp3	,
		head1	,
		railbridges	,
		recursiondepth
	)

Retry building a rail track after it was interrupted.

The last three pieces of track are removed, and then pathfinding is restarted from the other end.

Parameters

prevprev	The last successfully built piece of track.
pp1	The piece of track before prevprev.
pp2	The piece of track before pp1.
pp3	The piece of track before pp2. It is not removed.
head1	The other end to be connected.
railbridges	The list of railbridges. If we need to build a bridge it will be added to this list.
recursiondepth	The recursion depth used to catch infinite recursions.

Returns

True if the construction succeeded.

function WormRailBuilder::TrainEngineValuator ( engine  , weight  , max_speed  , money    )

static

A valuator function for scoring train locomotives.

Parameters

engine	The engine to be scored.
weight	The weight to be pulled.
max_speed	The maximum speed allowed.
money	The amount of money the company has.

Returns

The score of the engine.

Todo:

the money parameter seems not to be used.

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The documentation for this class was generated from the following file:

• railbuilder.nut