#include "stdafx.h"
#include "viewport_func.h"
#include "command_func.h"
#include "depot_base.h"
#include "pathfinder/yapf/yapf_cache.h"
#include "newgrf_debug.h"
#include "newgrf_railtype.h"
#include "train.h"
#include "autoslope.h"
#include "water.h"
#include "tunnelbridge_map.h"
#include "vehicle_func.h"
#include "sound_func.h"
#include "tunnelbridge.h"
#include "elrail_func.h"
#include "town.h"
#include "pbs.h"
#include "company_base.h"
#include "core/backup_type.hpp"
#include "core/container_func.hpp"
#include "timer/timer_game_calendar.h"
#include "strings_func.h"
#include "company_gui.h"
#include "object_map.h"
#include "rail_cmd.h"
#include "landscape_cmd.h"
#include "table/strings.h"
#include "table/railtypes.h"
#include "table/track_land.h"
#include "safeguards.h"

Data Structures
struct	FenceOffset
	Offsets for drawing fences. More...

Typedefs
typedef std::vector< Train * >	TrainList
	Helper type for lists/vectors of trains.

Enumerations
enum	SignalOffsets { SIGNAL_TO_SOUTHWEST, SIGNAL_TO_NORTHEAST, SIGNAL_TO_SOUTHEAST, SIGNAL_TO_NORTHWEST, SIGNAL_TO_EAST, SIGNAL_TO_WEST, SIGNAL_TO_SOUTH, SIGNAL_TO_NORTH }
	Enum holding the signal offset in the sprite sheet according to the side it is representing.

Functions
void	ResetRailTypes ()
	Reset all rail type information to its default values.

void	ResolveRailTypeGUISprites (RailTypeInfo *rti)

static bool	CompareRailTypes (const RailType &first, const RailType &second)
	Compare railtypes based on their sorting order. More...

void	InitRailTypes ()
	Resolve sprites of custom rail types.

RailType	AllocateRailType (RailTypeLabel label)
	Allocate a new rail type label.

static CommandCost	EnsureNoTrainOnTrack (TileIndex tile, Track track)
	Tests if a vehicle interacts with the specified track. More...

static CommandCost	CheckTrackCombination (TileIndex tile, TrackBits to_build)
	Check that the new track bits may be built. More...

Foundation	GetRailFoundation (Slope tileh, TrackBits bits)
	Checks if a track combination is valid on a specific slope and returns the needed foundation. More...

static CommandCost	CheckRailSlope (Slope tileh, TrackBits rail_bits, TrackBits existing, TileIndex tile)
	Tests if a track can be build on a tile. More...

static bool	ValParamTrackOrientation (Track track)

CommandCost	CmdBuildSingleRail (DoCommandFlag flags, TileIndex tile, RailType railtype, Track track, bool auto_remove_signals)
	Build a single piece of rail. More...

CommandCost	CmdRemoveSingleRail (DoCommandFlag flags, TileIndex tile, Track track)
	Remove a single piece of track. More...

bool	FloodHalftile (TileIndex t)
	Called from water_cmd if a non-flat rail-tile gets flooded and should be converted to shore. More...

static CommandCost	ValidateAutoDrag (Trackdir *trackdir, TileIndex start, TileIndex end)

static CommandCost	CmdRailTrackHelper (DoCommandFlag flags, TileIndex tile, TileIndex end_tile, RailType railtype, Track track, bool remove, bool auto_remove_signals, bool fail_on_obstacle)
	Build or remove a stretch of railroad tracks. More...

CommandCost	CmdBuildRailroadTrack (DoCommandFlag flags, TileIndex end_tile, TileIndex start_tile, RailType railtype, Track track, bool auto_remove_signals, bool fail_on_obstacle)
	Build rail on a stretch of track. More...

CommandCost	CmdRemoveRailroadTrack (DoCommandFlag flags, TileIndex end_tile, TileIndex start_tile, Track track)
	Build rail on a stretch of track. More...

CommandCost	CmdBuildTrainDepot (DoCommandFlag flags, TileIndex tile, RailType railtype, DiagDirection dir)
	Build a train depot. More...

CommandCost	CmdBuildSingleSignal (DoCommandFlag flags, TileIndex tile, Track track, SignalType sigtype, SignalVariant sigvar, bool convert_signal, bool skip_existing_signals, bool ctrl_pressed, SignalType cycle_start, SignalType cycle_stop, uint8_t num_dir_cycle, byte signals_copy)
	Build signals, alternate between double/single, signal/semaphore, pre/exit/combo-signals, and what-else not. More...

static bool	AdvanceSignalAutoFill (TileIndex &tile, Trackdir &trackdir, bool remove)

static CommandCost	CmdSignalTrackHelper (DoCommandFlag flags, TileIndex tile, TileIndex end_tile, Track track, SignalType sigtype, SignalVariant sigvar, bool mode, bool remove, bool autofill, bool minimise_gaps, int signal_density)
	Build many signals by dragging; AutoSignals. More...

CommandCost	CmdBuildSignalTrack (DoCommandFlag flags, TileIndex tile, TileIndex end_tile, Track track, SignalType sigtype, SignalVariant sigvar, bool mode, bool autofill, bool minimise_gaps, byte signal_density)
	Build signals on a stretch of track. More...

CommandCost	CmdRemoveSingleSignal (DoCommandFlag flags, TileIndex tile, Track track)
	Remove signals. More...

CommandCost	CmdRemoveSignalTrack (DoCommandFlag flags, TileIndex tile, TileIndex end_tile, Track track, bool autofill)
	Remove signals on a stretch of track. More...

static Vehicle *	UpdateTrainPowerProc (Vehicle v, void data)
	Update power of train under which is the railtype being converted.

CommandCost	CmdConvertRail (DoCommandFlag flags, TileIndex tile, TileIndex area_start, RailType totype, bool diagonal)
	Convert one rail type to the other. More...

static CommandCost	RemoveTrainDepot (TileIndex tile, DoCommandFlag flags)

static CommandCost	ClearTile_Track (TileIndex tile, DoCommandFlag flags)

static uint	GetSaveSlopeZ (uint x, uint y, Track track)
	Get surface height in point (x,y) On tiles with halftile foundations move (x,y) to a safe point wrt. More...

static void	DrawSingleSignal (TileIndex tile, const RailTypeInfo *rti, Track track, SignalState condition, SignalOffsets image, uint pos)

static void	DrawTrackFence (const TileInfo *ti, SpriteID base_image, uint num_sprites, RailFenceOffset rfo)
	Draw a track fence. More...

static void	DrawTrackFence_NW (const TileInfo *ti, SpriteID base_image, uint num_sprites)
	Draw fence at NW border matching the tile slope.

static void	DrawTrackFence_SE (const TileInfo *ti, SpriteID base_image, uint num_sprites)
	Draw fence at SE border matching the tile slope.

static void	DrawTrackFence_NE (const TileInfo *ti, SpriteID base_image, uint num_sprites)
	Draw fence at NE border matching the tile slope.

static void	DrawTrackFence_SW (const TileInfo *ti, SpriteID base_image, uint num_sprites)
	Draw fence at SW border matching the tile slope.

static void	DrawTrackDetails (const TileInfo ti, const RailTypeInfo rti)
	Draw track fences. More...

static void	DrawTrackSprite (SpriteID sprite, PaletteID pal, const TileInfo *ti, Slope s)

static void	DrawTrackBitsOverlay (TileInfo ti, TrackBits track, const RailTypeInfo rti)

static void	DrawTrackBits (TileInfo *ti, TrackBits track)
	Draw ground sprite and track bits. More...

static void	DrawSignals (TileIndex tile, TrackBits rails, const RailTypeInfo *rti)

static void	DrawTile_Track (TileInfo *ti)

void	DrawTrainDepotSprite (int x, int y, int dir, RailType railtype)

static int	GetSlopePixelZ_Track (TileIndex tile, uint x, uint y, bool)

static Foundation	GetFoundation_Track (TileIndex tile, Slope tileh)

static void	TileLoop_Track (TileIndex tile)

static TrackStatus	GetTileTrackStatus_Track (TileIndex tile, TransportType mode, uint, DiagDirection side)

static bool	ClickTile_Track (TileIndex tile)

static void	GetTileDesc_Track (TileIndex tile, TileDesc *td)

static void	ChangeTileOwner_Track (TileIndex tile, Owner old_owner, Owner new_owner)

int	TicksToLeaveDepot (const Train *v)
	Compute number of ticks when next wagon will leave a depot. More...

static VehicleEnterTileStatus	VehicleEnter_Track (Vehicle *u, TileIndex tile, int x, int y)
	Tile callback routine when vehicle enters tile. More...

static CommandCost	TestAutoslopeOnRailTile (TileIndex tile, uint flags, int z_old, Slope tileh_old, int z_new, Slope tileh_new, TrackBits rail_bits)
	Tests if autoslope is allowed. More...

static Vehicle *	EnsureNoShipProc (Vehicle v, void )
	Test-procedure for HasVehicleOnPos to check for a ship.

static CommandCost	TerraformTile_Track (TileIndex tile, DoCommandFlag flags, int z_new, Slope tileh_new)

Variables
RailTypeInfo	_railtypes [RAILTYPE_END]

std::vector< RailType >	_sorted_railtypes

RailTypes	_railtypes_hidden_mask

static const byte	_track_sloped_sprites [14]

static const TrackBits	_valid_tracks_without_foundation [15]
	Valid TrackBits on a specific (non-steep)-slope without foundation. More...

static const TrackBits	_valid_tracks_on_leveled_foundation [15]
	Valid TrackBits on a specific (non-steep)-slope with leveled foundation. More...

static const TileIndexDiffC	_trackdelta []

static uint32_t	_drawtile_track_palette

static FenceOffset	_fence_offsets []
	Offsets for drawing fences. More...

static const int	INF = 1000

static const SubSprite	_halftile_sub_sprite [4]

static const byte	_fractcoords_behind [4] = { 0x8F, 0x8, 0x80, 0xF8 }

static const byte	_fractcoords_enter [4] = { 0x8A, 0x48, 0x84, 0xA8 }

static const int8_t	_deltacoord_leaveoffset [8]

const TileTypeProcs	_tile_type_rail_procs

Detailed Description

Handling of rail tiles.

Definition in file rail_cmd.cpp.

Function Documentation

◆ CheckRailSlope()

static CommandCost CheckRailSlope	(	Slope	tileh,
		TrackBits	rail_bits,
		TrackBits	existing,
		TileIndex	tile
	)

static

Tests if a track can be build on a tile.

Parameters

tileh	Tile slope.
rail_bits	Tracks to build.
existing	Tracks already built.
tile	Tile (used for water test)

Returns: Error message or cost for foundation building.

Definition at line 392 of file rail_cmd.cpp.

References _settings_game, _valid_tracks_on_leveled_foundation, ConstructionSettings::build_on_slopes, GameSettings::construction, EXPENSES_CONSTRUCTION, FLOOD_NONE, FOUNDATION_INVALID, FOUNDATION_NONE, GetFloodingBehaviour(), GetRailFoundation(), IsSteepSlope(), and return_cmd_error.

Referenced by TestAutoslopeOnRailTile().

◆ CheckTrackCombination()

static CommandCost CheckTrackCombination	(	TileIndex	tile,
		TrackBits	to_build
	)

static

Check that the new track bits may be built.

Parameters

tile	Tile to build on.
to_build	New track bits.

Returns: Succeeded or failed command.

Definition at line 241 of file rail_cmd.cpp.

References GetTrackBits(), IsPlainRail(), and return_cmd_error.

◆ CmdBuildRailroadTrack()

CommandCost CmdBuildRailroadTrack	(	DoCommandFlag	flags,
		TileIndex	end_tile,
		TileIndex	start_tile,
		RailType	railtype,
		Track	track,
		bool	auto_remove_signals,
		bool	fail_on_obstacle
	)

Build rail on a stretch of track.

Stub for the unified rail builder/remover

Parameters

flags	operation to perform
end_tile	end tile of drag
start_tile	start tile of drag
railtype	railroad type normal/maglev (0 = normal, 1 = mono, 2 = maglev), only used for building
track	track-orientation
auto_remove_signals	false = build up to an obstacle, true = fail if an obstacle is found (used for AIs).
fail_on_obstacle	false = error on signal in the way, true = auto remove signals when in the way

See also: CmdRailTrackHelper

Definition at line 942 of file rail_cmd.cpp.

References CmdRailTrackHelper().

◆ CmdBuildSignalTrack()

CommandCost CmdBuildSignalTrack	(	DoCommandFlag	flags,
		TileIndex	tile,
		TileIndex	end_tile,
		Track	track,
		SignalType	sigtype,
		SignalVariant	sigvar,
		bool	mode,
		bool	autofill,
		bool	minimise_gaps,
		byte	signal_density
	)

Build signals on a stretch of track.

Stub for the unified signal builder/remover

Parameters

flags	operation to perform
tile	start tile of drag
end_tile	end tile of drag
track	track-orientation
sigtype	default signal type
sigvar	signal variant to build
mode	true = override signal/semaphore, or pre/exit/combo signal (CTRL-toggle)
autofill	fill beyond selected stretch? (currently always true but keep the command parameter so network-compatible patch packs can restore this functionality).
minimise_gaps	false = keep fixed distance, true = minimise gaps between signals
signal_density	user defined signals_density

Returns: the cost of this operation or an error

See also: CmdSignalTrackHelper

Definition at line 1459 of file rail_cmd.cpp.

References CmdSignalTrackHelper().

◆ CmdBuildSingleRail()

CommandCost CmdBuildSingleRail	(	DoCommandFlag	flags,
		TileIndex	tile,
		RailType	railtype,
		Track	track,
		bool	auto_remove_signals
	)

Build a single piece of rail.

Parameters

flags	operation to perform
tile	tile to build on
railtype	railtype of being built piece (normal, mono, maglev)
track	track-orientation
auto_remove_signals	false = error on signal in the way, true = auto remove signals when in the way

Returns: the cost of this operation or an error

Definition at line 426 of file rail_cmd.cpp.

References EXPENSES_CONSTRUCTION, and ValParamRailType().

◆ CmdBuildSingleSignal()

CommandCost CmdBuildSingleSignal	(	DoCommandFlag	flags,
		TileIndex	tile,
		Track	track,
		SignalType	sigtype,
		SignalVariant	sigvar,
		bool	convert_signal,
		bool	skip_existing_signals,
		bool	ctrl_pressed,
		SignalType	cycle_start,
		SignalType	cycle_stop,
		uint8_t	num_dir_cycle,
		byte	signals_copy
	)

Build signals, alternate between double/single, signal/semaphore, pre/exit/combo-signals, and what-else not.

If the rail piece does not have any signals, signal cycling is ignored

Parameters

flags	operation to perform
tile	tile where to build the signals
track	track-orientation
sigtype	type of the signal
sigvar	variant of signal type (normal/semaphore)
ctrl_pressed	true = override signal/semaphore, or pre/exit/combo signal or toggle variant (CTRL-toggle)
convert_signal	convert the present signal type and variant
cycle_start	start cycle from this signal type
cycle_stop	wrap around after this signal type
num_dir_cycle	cycle the signal direction this many times
skip_existing_signals	true = don't modify an existing signal but don't fail either, false = always set new signal type
signals_copy	used for CmdBuildManySignals() to copy direction of first signal

Returns: the cost of this operation or an error

Todo:: p2 should be replaced by two bits for "along" and "against" the track.

Definition at line 1062 of file rail_cmd.cpp.

◆ CmdBuildTrainDepot()

CommandCost CmdBuildTrainDepot	(	DoCommandFlag	flags,
		TileIndex	tile,
		RailType	railtype,
		DiagDirection	dir
	)

Build a train depot.

Parameters

flags	operation to perform
tile	position of the train depot
railtype	rail type
dir	entrance direction

Returns: the cost of this operation or an error

Todo:: When checking for the tile slope, distinguish between "Flat land required" and "land sloped in wrong direction"

Definition at line 973 of file rail_cmd.cpp.

References _settings_game, CommandCost::AddCost(), ConstructionSettings::build_on_slopes, CanBuildDepotByTileh(), CMD_ERROR, GameSettings::construction, EXPENSES_CONSTRUCTION, GetTileSlope(), IsValidDiagDirection(), return_cmd_error, SLOPE_FLAT, and ValParamRailType().

◆ CmdConvertRail()

CommandCost CmdConvertRail	(	DoCommandFlag	flags,
		TileIndex	tile,
		TileIndex	area_start,
		RailType	totype,
		bool	diagonal
	)

Convert one rail type to the other.

You can convert normal rail to monorail/maglev easily or vice-versa.

Parameters

flags	operation to perform
tile	end tile of rail conversion drag
area_start	start tile of drag
totype	new railtype to convert to.
diagonal	build diagonally or not.

Returns: the cost of this operation or an error

Definition at line 1563 of file rail_cmd.cpp.

References _settings_game, CommandCost::AddCost(), CCF_TRACK, CheckTileOwnership(), CMD_ERROR, CountBits(), TileIterator::Create(), DC_EXEC, DiagDirToDiagTrack(), DirtyCompanyInfrastructureWindows(), VehicleSettings::disable_elrails, EnsureNoTrainOnTrackBits(), EnsureNoVehicleOnGround(), EXPENSES_CONSTRUCTION, CommandCost::Failed(), FindVehicleOnPos(), FreeTrainTrackReservation(), Pool< Titem, Tindex, Tgrowth_step, Tmax_size, Tpool_type, Tcache, Tzero >::PoolItem<&_company_pool >::Get(), GetCrossingRailTrack(), GetOtherTunnelBridgeEnd(), GetRailDepotTrack(), GetRailStationTrack(), GetRailTileType(), GetRailType(), GetReservedTrackbits(), GetTileOwner(), GetTileType(), GetTrackBits(), GetTrainForReservation(), GetTunnelBridgeDirection(), GetTunnelBridgeLength(), GetTunnelBridgeTransportType(), HasPowerOnRail(), HasStationRail(), HasTunnelBridgeReservation(), Pool< Titem, Tindex, Tgrowth_step, Tmax_size, Tpool_type, Tcache, Tzero >::PoolItem< Tpool >::index, Company::infrastructure, INVALID_TILE, INVALID_TRACK, InvalidateWindowData(), IsBridge(), IsCompatibleRail(), IsLevelCrossing(), IsLevelCrossingTile(), IsPlainRailTile(), IsRailStationTile(), IsStationTileBlocked(), LEVELCROSSING_TRACKBIT_FACTOR, CommandCost::MakeError(), MarkBridgeDirty(), MarkTileDirtyByTile(), MP_RAILWAY, MP_ROAD, MP_STATION, MP_TUNNELBRIDGE, CompanyInfrastructure::rail, RAIL_TILE_DEPOT, RailConvertCost(), RailNoLevelCrossings(), RAILTYPE_ELECTRIC, RAILTYPE_RAIL, RemoveFirstTrack(), SetRailType(), Map::Size(), TRACK_BIT_NONE, TracksOverlap(), TRANSPORT_RAIL, TryPathReserve(), TUNNELBRIDGE_TRACKBIT_FACTOR, TunnelBridgeIsFree(), UpdateTrainPowerProc(), ValParamRailType(), GameSettings::vehicle, WC_BUILD_VEHICLE, WC_VEHICLE_DEPOT, and YapfNotifyTrackLayoutChange().

◆ CmdRailTrackHelper()

static CommandCost CmdRailTrackHelper	(	DoCommandFlag	flags,
		TileIndex	tile,
		TileIndex	end_tile,
		RailType	railtype,
		Track	track,
		bool	remove,
		bool	auto_remove_signals,
		bool	fail_on_obstacle
	)

static

Build or remove a stretch of railroad tracks.

Parameters

flags	operation to perform
tile	start tile of drag
end_tile	end tile of drag
railtype	railroad type normal/maglev (0 = normal, 1 = mono, 2 = maglev), only used for building
track	track-orientation
remove	remove tracks?
auto_remove_signals	false = error on signal in the way, true = auto remove signals when in the way, only used for building
fail_on_obstacle	false = build starting from and up to an obstacle, true = fail if an obstacle is found (used for AIs)

Returns: the cost of this operation or an error

Definition at line 876 of file rail_cmd.cpp.

References EXPENSES_CONSTRUCTION, and ValParamRailType().

Referenced by CmdBuildRailroadTrack(), and CmdRemoveRailroadTrack().

◆ CmdRemoveRailroadTrack()

CommandCost CmdRemoveRailroadTrack	(	DoCommandFlag	flags,
		TileIndex	end_tile,
		TileIndex	start_tile,
		Track	track
	)

Build rail on a stretch of track.

Stub for the unified rail builder/remover

Parameters

flags	operation to perform
end_tile	end tile of drag
start_tile	start tile of drag
track	track-orientation

Returns: the cost of this operation or an error

See also: CmdRailTrackHelper

Definition at line 957 of file rail_cmd.cpp.

References CmdRailTrackHelper(), and INVALID_RAILTYPE.

◆ CmdRemoveSignalTrack()

CommandCost CmdRemoveSignalTrack	(	DoCommandFlag	flags,
		TileIndex	tile,
		TileIndex	end_tile,
		Track	track,
		bool	autofill
	)

Remove signals on a stretch of track.

Stub for the unified signal builder/remover

Parameters

flags	operation to perform
tile	start tile of drag
end_tile	end tile of drag
track	track-orientation
autofill	fill beyond selected stretch? (currently always true but keep the command parameter so network-compatible patch packs can restore this functionality).

Returns: the cost of this operation or an error

See also: CmdSignalTrackHelper

Definition at line 1537 of file rail_cmd.cpp.

References CmdSignalTrackHelper(), SIG_ELECTRIC, and SIGTYPE_BLOCK.

◆ CmdRemoveSingleRail()

CommandCost CmdRemoveSingleRail	(	DoCommandFlag	flags,
		TileIndex	tile,
		Track	track
	)

Remove a single piece of track.

Parameters

flags	operation to perform
tile	tile to remove track from
track	rail orientation

Returns: the cost of this operation or an error

Definition at line 615 of file rail_cmd.cpp.

References EXPENSES_CONSTRUCTION.

◆ CmdRemoveSingleSignal()

CommandCost CmdRemoveSingleSignal	(	DoCommandFlag	flags,
		TileIndex	tile,
		Track	track
	)

Remove signals.

Parameters

flags	operation to perform
tile	coordinates where signal is being deleted from
track	track-orientation

Returns: the cost of this operation or an error

Definition at line 1471 of file rail_cmd.cpp.

◆ CmdSignalTrackHelper()

static CommandCost CmdSignalTrackHelper	(	DoCommandFlag	flags,
		TileIndex	tile,
		TileIndex	end_tile,
		Track	track,
		SignalType	sigtype,
		SignalVariant	sigvar,
		bool	mode,
		bool	remove,
		bool	autofill,
		bool	minimise_gaps,
		int	signal_density
	)

static

Build many signals by dragging; AutoSignals.

Parameters

flags	operation to perform
tile	start tile of drag
end_tile	end tile of drag
track	track-orientation
sigtype	default signal type
sigvar	signal variant to build
mode	true = override signal/semaphore, or pre/exit/combo signal (CTRL-toggle)
remove	remove signals?
autofill	fill beyond selected stretch?
minimise_gaps	false = keep fixed distance, true = minimise gaps between signals
signal_density	user defined signals_density

Returns: the cost of this operation or an error

Definition at line 1268 of file rail_cmd.cpp.

References EXPENSES_CONSTRUCTION, and Map::Size().

Referenced by CmdBuildSignalTrack(), and CmdRemoveSignalTrack().

◆ CompareRailTypes()

static bool CompareRailTypes	(	const RailType &	first,
		const RailType &	second
	)

static

Compare railtypes based on their sorting order.

Parameters

first	The railtype to compare to.
second	The railtype to compare.

Returns: True iff the first should be sorted before the second.

Definition at line 122 of file rail_cmd.cpp.

References GetRailTypeInfo(), and RailTypeInfo::sorting_order.

◆ DrawTrackBits()

static void DrawTrackBits	(	TileInfo *	ti,
		TrackBits	track
	)

static

Draw ground sprite and track bits.

Parameters

ti	TileInfo
track	TrackBits to draw

Definition at line 2247 of file rail_cmd.cpp.

References GetRailType(), GetRailTypeInfo(), and TileInfo::tile.

◆ DrawTrackDetails()

static void DrawTrackDetails	(	const TileInfo *	ti,
		const RailTypeInfo *	rti
	)

static

Draw track fences.

Parameters

ti	Tile drawing information.
rti	Rail type information.

Definition at line 2020 of file rail_cmd.cpp.

References GetCustomRailSprite(), IsHalftileSlope(), RTSG_FENCES, TCX_NORMAL, TCX_UPPER_HALFTILE, TileInfo::tile, and TileInfo::tileh.

◆ DrawTrackFence()

static void DrawTrackFence	(	const TileInfo *	ti,
		SpriteID	base_image,
		uint	num_sprites,
		RailFenceOffset	rfo
	)

static

Draw a track fence.

Parameters

ti	Tile drawing information.
base_image	First fence sprite.
num_sprites	Number of fence sprites.
rfo	Fence to draw.

Definition at line 1961 of file rail_cmd.cpp.

References _fence_offsets, and TileInfo::z.

Referenced by DrawTrackFence_NE(), DrawTrackFence_NW(), DrawTrackFence_SE(), and DrawTrackFence_SW().

◆ EnsureNoTrainOnTrack()

static CommandCost EnsureNoTrainOnTrack	(	TileIndex	tile,
		Track	track
	)

static

Tests if a vehicle interacts with the specified track.

All track bits interact except parallel TRACK_BIT_HORZ or TRACK_BIT_VERT.

Parameters

tile	The tile.
track	The track.

Returns: Succeeded command (no train found), or a failed command (a train was found).

Definition at line 229 of file rail_cmd.cpp.

References EnsureNoTrainOnTrackBits(), and TrackToTrackBits().

◆ FloodHalftile()

bool FloodHalftile ( TileIndex t )

Called from water_cmd if a non-flat rail-tile gets flooded and should be converted to shore.

The function floods the lower halftile, if the tile has a halftile foundation.

Parameters

t	The tile to flood.

Returns: true if something was flooded.

Definition at line 762 of file rail_cmd.cpp.

References IsPlainRailTile().

◆ GetRailFoundation()

Foundation GetRailFoundation	(	Slope	tileh,
		TrackBits	bits
	)

Checks if a track combination is valid on a specific slope and returns the needed foundation.

Parameters

tileh	Tile slope.
bits	Trackbits.

Returns: Needed foundation or FOUNDATION_INVALID if track/slope combination is not allowed.

Definition at line 312 of file rail_cmd.cpp.

References _valid_tracks_on_leveled_foundation, _valid_tracks_without_foundation, CornerToTrackBits(), FOUNDATION_INCLINED_X, FOUNDATION_INCLINED_Y, FOUNDATION_INVALID, FOUNDATION_NONE, FOUNDATION_STEEP_BOTH, FOUNDATION_STEEP_LOWER, GetHighestSlopeCorner(), HalftileFoundation(), IsSteepSlope(), TRACK_BIT_LEFT, TRACK_BIT_NONE, TRACK_BIT_X, TRACK_BIT_Y, and TracksOverlap().

Referenced by CheckRailSlope(), and TestAutoslopeOnRailTile().

◆ GetSaveSlopeZ()

static uint GetSaveSlopeZ	(	uint	x,
		uint	y,
		Track	track
	)

static

Get surface height in point (x,y) On tiles with halftile foundations move (x,y) to a safe point wrt.

track

Definition at line 1869 of file rail_cmd.cpp.

◆ TestAutoslopeOnRailTile()

static CommandCost TestAutoslopeOnRailTile	(	TileIndex	tile,
		uint	flags,
		int	z_old,
		Slope	tileh_old,
		int	z_new,
		Slope	tileh_new,
		TrackBits	rail_bits
	)

static

Tests if autoslope is allowed.

Parameters

tile	The tile.
flags	Terraform command flags.
z_old	Old TileZ.
tileh_old	Old TileSlope.
z_new	New TileZ.
tileh_new	New TileSlope.
rail_bits	Trackbits.

Definition at line 3006 of file rail_cmd.cpp.

References _settings_game, ApplyFoundationToSlope(), AutoslopeEnabled(), ConstructionSettings::build_on_slopes, CheckRailSlope(), GameSettings::construction, GetRailFoundation(), return_cmd_error, TRACK_BIT_LEFT, and TRACK_BIT_NONE.

◆ TicksToLeaveDepot()

int TicksToLeaveDepot ( const Train * v )

Compute number of ticks when next wagon will leave a depot.

Negative means next wagon should have left depot n ticks before.

Parameters

v	vehicle outside (leaving) the depot

Returns: number of ticks when the next wagon will leave

Definition at line 2928 of file rail_cmd.cpp.

References Train::CalcNextVehicleOffset(), DIAGDIR_NE, GetRailDepotDirection(), Vehicle::tile, and Vehicle::x_pos.

Referenced by AdvanceWagonsAfterSwap(), and CheckTrainsLengths().

◆ VehicleEnter_Track()

static VehicleEnterTileStatus VehicleEnter_Track	(	Vehicle *	u,
		TileIndex	tile,
		int	x,
		int	y
	)

static

Tile callback routine when vehicle enters tile.

See also: vehicle_enter_tile_proc

Definition at line 2946 of file rail_cmd.cpp.

Variable Documentation

◆ _deltacoord_leaveoffset

const int8_t _deltacoord_leaveoffset[8]

static

Initial value:

= {
  -1,  0,  1,  0, 
   0,  1,  0, -1  
}

Definition at line 2916 of file rail_cmd.cpp.

◆ _fence_offsets

FenceOffset _fence_offsets[]

static

Initial value:

= {
  { CORNER_INVALID,  0,  1, 16,  1 }, 
  { CORNER_INVALID,  1,  0,  1, 16 }, 
  { CORNER_W,        8,  8,  1,  1 }, 
  { CORNER_N,        8,  8,  1,  1 }, 
  { CORNER_INVALID,  0,  1, 16,  1 }, 
  { CORNER_INVALID,  1,  0,  1, 16 }, 
  { CORNER_INVALID,  0,  1, 16,  1 }, 
  { CORNER_INVALID,  1,  0,  1, 16 }, 
  { CORNER_INVALID,  0, 15, 16,  1 }, 
  { CORNER_INVALID, 15,  0,  1, 16 }, 
  { CORNER_E,        8,  8,  1,  1 }, 
  { CORNER_S,        8,  8,  1,  1 }, 
  { CORNER_INVALID,  0, 15, 16,  1 }, 
  { CORNER_INVALID, 15,  0,  1, 16 }, 
  { CORNER_INVALID,  0, 15, 16,  1 }, 
  { CORNER_INVALID, 15,  0,  1, 16 }, 
}

Offsets for drawing fences.

Definition at line 1935 of file rail_cmd.cpp.

Referenced by DrawTrackFence().

◆ _halftile_sub_sprite

const SubSprite _halftile_sub_sprite[4]

static

Initial value:

= {
  { -INF    , -INF  , 32 - 33, INF     }, 
  { -INF    ,  0 + 7, INF    , INF     }, 
  { -31 + 33, -INF  , INF    , INF     }, 
  { -INF    , -INF  , INF    , 30 - 23 }  
}

Definition at line 2070 of file rail_cmd.cpp.

◆ _tile_type_rail_procs

const TileTypeProcs _tile_type_rail_procs

Initial value:

= {
  DrawTile_Track,           
  GetSlopePixelZ_Track,     
  ClearTile_Track,          
  nullptr,                     
  GetTileDesc_Track,        
  GetTileTrackStatus_Track, 
  ClickTile_Track,          
  nullptr,                     
  TileLoop_Track,           
  ChangeTileOwner_Track,    
  nullptr,                     
  VehicleEnter_Track,       
  GetFoundation_Track,      
  TerraformTile_Track,      
}

Definition at line 48 of file landscape.cpp.

◆ _track_sloped_sprites

const byte _track_sloped_sprites[14]

static

Initial value:

= {
  14, 15, 22, 13,
   0, 21, 17, 12,
  23,  0, 18, 20,
  19, 16
}

Definition at line 182 of file rail_cmd.cpp.

◆ _trackdelta

const TileIndexDiffC _trackdelta[]

static

Initial value:

= {
  { -1,  0 }, {  0,  1 }, { -1,  0 }, {  0,  1 }, {  1,  0 }, {  0,  1 },
  {  0,  0 },
  {  0,  0 },
  {  1,  0 }, {  0, -1 }, {  0, -1 }, {  1,  0 }, {  0, -1 }, { -1,  0 },
  {  0,  0 },
  {  0,  0 }
}

Definition at line 807 of file rail_cmd.cpp.

◆ _valid_tracks_on_leveled_foundation

const TrackBits _valid_tracks_on_leveled_foundation[15]

static

Initial value:

Valid TrackBits on a specific (non-steep)-slope with leveled foundation.

Definition at line 284 of file rail_cmd.cpp.

Referenced by CheckRailSlope(), and GetRailFoundation().

◆ _valid_tracks_without_foundation

const TrackBits _valid_tracks_without_foundation[15]

static

Initial value:

= {
  TRACK_BIT_ALL,
  TRACK_BIT_RIGHT,
  TRACK_BIT_UPPER,
  TRACK_BIT_X,
 
  TRACK_BIT_LEFT,
  TRACK_BIT_NONE,
  TRACK_BIT_Y,
  TRACK_BIT_LOWER,
 
  TRACK_BIT_LOWER,
  TRACK_BIT_Y,
  TRACK_BIT_NONE,
  TRACK_BIT_LEFT,
 
  TRACK_BIT_X,
  TRACK_BIT_UPPER,
  TRACK_BIT_RIGHT,
}

Valid TrackBits on a specific (non-steep)-slope without foundation.

Definition at line 262 of file rail_cmd.cpp.

Referenced by GetRailFoundation().

Data Structures

Typedefs

Enumerations

Functions

Variables

Detailed Description

Function Documentation

◆ CheckRailSlope()

◆ CheckTrackCombination()

◆ CmdBuildRailroadTrack()

◆ CmdBuildSignalTrack()

◆ CmdBuildSingleRail()

◆ CmdBuildSingleSignal()

◆ CmdBuildTrainDepot()

◆ CmdConvertRail()

◆ CmdRailTrackHelper()

◆ CmdRemoveRailroadTrack()

◆ CmdRemoveSignalTrack()

◆ CmdRemoveSingleRail()

◆ CmdRemoveSingleSignal()

◆ CmdSignalTrackHelper()

◆ CompareRailTypes()

◆ DrawTrackBits()

◆ DrawTrackDetails()

◆ DrawTrackFence()

◆ EnsureNoTrainOnTrack()

◆ FloodHalftile()

◆ GetRailFoundation()

◆ GetSaveSlopeZ()

◆ TestAutoslopeOnRailTile()

◆ TicksToLeaveDepot()

◆ VehicleEnter_Track()

Variable Documentation

◆ _deltacoord_leaveoffset

◆ _fence_offsets

◆ _halftile_sub_sprite

◆ _tile_type_rail_procs

◆ _track_sloped_sprites

◆ _trackdelta

◆ _valid_tracks_on_leveled_foundation

◆ _valid_tracks_without_foundation