#include "stdafx.h"
#include "newgrf_object.h"
#include "viewport_func.h"
#include "command_func.h"
#include "town.h"
#include "train.h"
#include "ship.h"
#include "roadveh.h"
#include "pathfinder/yapf/yapf_cache.h"
#include "pathfinder/water_regions.h"
#include "newgrf_sound.h"
#include "autoslope.h"
#include "tunnelbridge_map.h"
#include "strings_func.h"
#include "timer/timer_game_calendar.h"
#include "clear_func.h"
#include "vehicle_func.h"
#include "sound_func.h"
#include "tunnelbridge.h"
#include "cheat_type.h"
#include "elrail_func.h"
#include "pbs.h"
#include "company_base.h"
#include "newgrf_railtype.h"
#include "newgrf_roadtype.h"
#include "object_base.h"
#include "water.h"
#include "company_gui.h"
#include "station_func.h"
#include "tunnelbridge_cmd.h"
#include "landscape_cmd.h"
#include "terraform_cmd.h"
#include "table/strings.h"
#include "table/bridge_land.h"
#include "safeguards.h"

Functions
void	MarkBridgeDirty (TileIndex begin, TileIndex end, DiagDirection direction, uint bridge_height)
	Mark bridge tiles dirty. More...

void	MarkBridgeDirty (TileIndex tile)
	Mark bridge tiles dirty. More...

void	ResetBridges ()
	Reset the data been eventually changed by the grf loaded.

int	CalcBridgeLenCostFactor (int length)
	Calculate the price factor for building a long bridge. More...

Foundation	GetBridgeFoundation (Slope tileh, Axis axis)
	Get the foundation for a bridge. More...

bool	HasBridgeFlatRamp (Slope tileh, Axis axis)
	Determines if the track on a bridge ramp is flat or goes up/down. More...

static const PalSpriteID *	GetBridgeSpriteTable (int index, BridgePieces table)

static CommandCost	CheckBridgeSlope (BridgePieces bridge_piece, Axis axis, Slope &tileh, int &z)
	Determines the foundation for the bridge head, and tests if the resulting slope is valid. More...

CommandCost	CheckBridgeAvailability (BridgeType bridge_type, uint bridge_len, DoCommandFlag flags)
	Is a bridge of the specified type and length available? More...

static Money	TunnelBridgeClearCost (TileIndex tile, Price base_price)
	Calculate the base cost of clearing a tunnel/bridge per tile. More...

CommandCost	CmdBuildBridge (DoCommandFlag flags, TileIndex tile_end, TileIndex tile_start, TransportType transport_type, BridgeType bridge_type, uint8_t road_rail_type)
	Build a Bridge. More...

CommandCost	CmdBuildTunnel (DoCommandFlag flags, TileIndex start_tile, TransportType transport_type, uint8_t road_rail_type)
	Build Tunnel. More...

static CommandCost	CheckAllowRemoveTunnelBridge (TileIndex tile)
	Are we allowed to remove the tunnel or bridge at tile? More...

static CommandCost	DoClearTunnel (TileIndex tile, DoCommandFlag flags)
	Remove a tunnel from the game, update town rating, etc. More...

static CommandCost	DoClearBridge (TileIndex tile, DoCommandFlag flags)
	Remove a bridge from the game, update town rating, etc. More...

static CommandCost	ClearTile_TunnelBridge (TileIndex tile, DoCommandFlag flags)
	Remove a tunnel or a bridge from the game. More...

static void	DrawPillar (const PalSpriteID psid, int x, int y, int z, int w, int h, const SubSprite subsprite)
	Draw a single pillar sprite. More...

static int	DrawPillarColumn (int z_bottom, int z_top, const PalSpriteID *psid, int x, int y, int w, int h)
	Draw two bridge pillars (north and south). More...

static void	DrawBridgePillars (const PalSpriteID psid, const TileInfo ti, Axis axis, bool drawfarpillar, int x, int y, int z_bridge)
	Draws the pillars under high bridges. More...

static void	GetBridgeRoadCatenary (const RoadTypeInfo *rti, TileIndex head_tile, int offset, bool head, SpriteID &spr_back, SpriteID &spr_front)
	Retrieve the sprites required for catenary on a road/tram bridge. More...

static void	DrawBridgeRoadBits (TileIndex head_tile, int x, int y, int z, int offset, bool head)
	Draws the road and trambits over an already drawn (lower end) of a bridge. More...

static void	DrawTile_TunnelBridge (TileInfo *ti)
	Draws a tunnel of bridge tile. More...

static BridgePieces	CalcBridgePiece (uint north, uint south)
	Compute bridge piece. More...

void	DrawBridgeMiddle (const TileInfo *ti)
	Draw the middle bits of a bridge. More...

static int	GetSlopePixelZ_TunnelBridge (TileIndex tile, uint x, uint y, bool ground_vehicle)

static Foundation	GetFoundation_TunnelBridge (TileIndex tile, Slope tileh)

static void	GetTileDesc_TunnelBridge (TileIndex tile, TileDesc *td)

static void	TileLoop_TunnelBridge (TileIndex tile)

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

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

template<typename T >
static void	PrepareToEnterBridge (T *gv)
	Helper to prepare the ground vehicle when entering a bridge. More...

static VehicleEnterTileStatus	VehicleEnter_TunnelBridge (Vehicle *v, TileIndex tile, int x, int y)

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

Variables
BridgeSpec	_bridge [MAX_BRIDGES]
	The specification of all bridges.

TileIndex	_build_tunnel_endtile
	The end of a tunnel; as hidden return from the tunnel build command for GUI purposes.

static const int	BRIDGE_Z_START = 3
	Z position of the bridge sprites relative to bridge height (downwards)

static const uint8_t	TUNNEL_SOUND_FRAME = 1
	Frame when the 'enter tunnel' sound should be played. More...

const uint8_t	_tunnel_visibility_frame [DIAGDIR_END] = {12, 8, 8, 12}
	Frame when a vehicle should be hidden in a tunnel with a certain direction. More...

const TileTypeProcs	_tile_type_tunnelbridge_procs

Detailed Description

This file deals with tunnels and bridges (non-gui stuff)

Todo:: separate this file into two

Definition in file tunnelbridge_cmd.cpp.

Function Documentation

◆ CalcBridgeLenCostFactor()

int CalcBridgeLenCostFactor ( int length )

Calculate the price factor for building a long bridge.

Basically the cost delta is 1,1, 1, 2,2, 3,3,3, 4,4,4,4, 5,5,5,5,5, 6,6,6,6,6,6, 7,7,7,7,7,7,7, 8,8,8,8,8,8,8,8,

Parameters

length Length of the bridge.

Returns: Price factor for the bridge.

Definition at line 108 of file tunnelbridge_cmd.cpp.

Referenced by ShowBuildBridgeWindow().

◆ CalcBridgePiece()

static BridgePieces CalcBridgePiece	(	uint	north,
		uint	south
	)

static

Compute bridge piece.

Computes the bridge piece to display depending on the position inside the bridge. bridges pieces sequence (middle parts). Note that it is not covering the bridge heads, which are always referenced by the same sprite table. bridge len 1: BRIDGE_PIECE_NORTH bridge len 2: BRIDGE_PIECE_NORTH BRIDGE_PIECE_SOUTH bridge len 3: BRIDGE_PIECE_NORTH BRIDGE_PIECE_MIDDLE_ODD BRIDGE_PIECE_SOUTH bridge len 4: BRIDGE_PIECE_NORTH BRIDGE_PIECE_INNER_NORTH BRIDGE_PIECE_INNER_SOUTH BRIDGE_PIECE_SOUTH bridge len 5: BRIDGE_PIECE_NORTH BRIDGE_PIECE_INNER_NORTH BRIDGE_PIECE_MIDDLE_EVEN BRIDGE_PIECE_INNER_SOUTH BRIDGE_PIECE_SOUTH bridge len 6: BRIDGE_PIECE_NORTH BRIDGE_PIECE_INNER_NORTH BRIDGE_PIECE_INNER_SOUTH BRIDGE_PIECE_INNER_NORTH BRIDGE_PIECE_INNER_SOUTH BRIDGE_PIECE_SOUTH bridge len 7: BRIDGE_PIECE_NORTH BRIDGE_PIECE_INNER_NORTH BRIDGE_PIECE_INNER_SOUTH BRIDGE_PIECE_MIDDLE_ODD BRIDGE_PIECE_INNER_NORTH BRIDGE_PIECE_INNER_SOUTH BRIDGE_PIECE_SOUTH #0 - always as first, #1 - always as last (if len>1) #2,#3 are to pair in order for odd bridges: #5 is going in the bridge middle if on even position, #4 on odd (counting from 0)

Parameters

north	Northernmost tile of bridge
south	Southernmost tile of bridge

Returns: Index of bridge piece

Definition at line 1522 of file tunnelbridge_cmd.cpp.

Referenced by DrawBridgeMiddle().

◆ CheckAllowRemoveTunnelBridge()

static CommandCost CheckAllowRemoveTunnelBridge ( TileIndex tile )

inlinestatic

Are we allowed to remove the tunnel or bridge at tile?

Parameters

tile	End point of the tunnel or bridge.

Returns: A succeeded command if the tunnel or bridge may be removed, a failed command otherwise.

Definition at line 797 of file tunnelbridge_cmd.cpp.

References _current_company, and OWNER_WATER.

Referenced by DoClearBridge(), and DoClearTunnel().

◆ CheckBridgeAvailability()

CommandCost CheckBridgeAvailability	(	BridgeType	bridge_type,
		uint	bridge_len,
		DoCommandFlag	flags
	)

Is a bridge of the specified type and length available?

Parameters

bridge_type	Wanted type of bridge.
bridge_len	Wanted length of the bridge.
flags	Type of operation.

Returns: A succeeded (the requested bridge is available) or failed (it cannot be built) command.

Definition at line 200 of file tunnelbridge_cmd.cpp.

References _settings_game, BridgeSpec::avail_year, CMD_ERROR, GameSettings::construction, DC_QUERY_COST, GetBridgeSpec(), ConstructionSettings::max_bridge_length, MAX_BRIDGES, BridgeSpec::max_length, BridgeSpec::min_length, return_cmd_error, and TimerGameCalendar::year.

Referenced by ShowBuildBridgeWindow().

◆ CheckBridgeSlope()

static CommandCost CheckBridgeSlope	(	BridgePieces	bridge_piece,
		Axis	axis,
		Slope &	tileh,
		int &	z
	)

static

Determines the foundation for the bridge head, and tests if the resulting slope is valid.

Parameters

bridge_piece	Direction of the bridge head.
axis	Axis of the bridge
tileh	Slope of the tile under the north bridge head; returns slope on top of foundation
z	TileZ corresponding to tileh, gets modified as well

Returns: Error or cost for bridge foundation

Definition at line 173 of file tunnelbridge_cmd.cpp.

◆ ClearTile_TunnelBridge()

static CommandCost ClearTile_TunnelBridge	(	TileIndex	tile,
		DoCommandFlag	flags
	)

static

Remove a tunnel or a bridge from the game.

Parameters

tile	Tile containing one of the endpoints.
flags	Command flags.

Returns: Succeeded or failed command.

Definition at line 1016 of file tunnelbridge_cmd.cpp.

References DC_AUTO, DoClearBridge(), DoClearTunnel(), IsTunnel(), and return_cmd_error.

◆ CmdBuildBridge()

CommandCost CmdBuildBridge	(	DoCommandFlag	flags,
		TileIndex	tile_end,
		TileIndex	tile_start,
		TransportType	transport_type,
		BridgeType	bridge_type,
		uint8_t	road_rail_type
	)

Build a Bridge.

Parameters

flags	type of operation
tile_end	end tile
tile_start	start tile
transport_type	transport type.
bridge_type	bridge type (hi bh)
road_rail_type	rail type or road types.

Returns: the cost of this operation or an error

Definition at line 261 of file tunnelbridge_cmd.cpp.

References _current_company, Town::cache, CalcClosestTownFromTile(), CMD_ERROR, DistanceSquare(), INVALID_RAILTYPE, INVALID_ROADTYPE, IsValidTile(), OWNER_DEITY, OWNER_TOWN, return_cmd_error, TownCache::squared_town_zone_radius, TRANSPORT_RAIL, TRANSPORT_ROAD, TRANSPORT_WATER, ValParamRailType(), ValParamRoadType(), and Town::xy.

◆ CmdBuildTunnel()

CommandCost CmdBuildTunnel	(	DoCommandFlag	flags,
		TileIndex	start_tile,
		TransportType	transport_type,
		uint8_t	road_rail_type
	)

Build Tunnel.

Parameters

flags	type of operation
start_tile	start tile of tunnel
transport_type	transport type
road_rail_type	railtype or roadtype

Returns: the cost of this operation or an error

Definition at line 623 of file tunnelbridge_cmd.cpp.

References _build_tunnel_endtile, _current_company, Town::cache, CalcClosestTownFromTile(), CMD_ERROR, DistanceSquare(), INVALID_RAILTYPE, INVALID_ROADTYPE, OWNER_DEITY, OWNER_TOWN, TownCache::squared_town_zone_radius, TRANSPORT_RAIL, TRANSPORT_ROAD, ValParamRailType(), ValParamRoadType(), and Town::xy.

◆ DoClearBridge()

static CommandCost DoClearBridge	(	TileIndex	tile,
		DoCommandFlag	flags
	)

static

Remove a bridge from the game, update town rating, etc.

Parameters

tile	Tile containing one of the endpoints of the bridge.
flags	Command flags.

Returns: Succeeded or failed command.

Definition at line 925 of file tunnelbridge_cmd.cpp.

References CheckAllowRemoveTunnelBridge(), CommandCost::Failed(), GetOtherBridgeEnd(), GetTunnelBridgeDirection(), IsTileOwner(), OWNER_TOWN, TileOffsByDiagDir(), and TunnelBridgeIsFree().

Referenced by ClearTile_TunnelBridge().

◆ DoClearTunnel()

static CommandCost DoClearTunnel	(	TileIndex	tile,
		DoCommandFlag	flags
	)

static

Remove a tunnel from the game, update town rating, etc.

Parameters

tile	Tile containing one of the endpoints of the tunnel.
flags	Command flags.

Returns: Succeeded or failed command.

Definition at line 845 of file tunnelbridge_cmd.cpp.

References _build_tunnel_endtile, CheckAllowRemoveTunnelBridge(), CommandCost::Failed(), GetOtherTunnelEnd(), IsTileOwner(), OWNER_TOWN, and TunnelBridgeIsFree().

Referenced by ClearTile_TunnelBridge().

◆ DrawBridgeMiddle()

void DrawBridgeMiddle ( const TileInfo * ti )

Draw the middle bits of a bridge.

Parameters

ti	Tile information of the tile to draw it on.

Definition at line 1541 of file tunnelbridge_cmd.cpp.

References RailTypeInfo::bridge_offset, CalcBridgePiece(), GetBridgeAxis(), GetBridgeSpec(), GetBridgeType(), GetNorthernBridgeEnd(), GetRailType(), GetRailTypeInfo(), GetSouthernBridgeEnd(), GetTunnelBridgeLength(), GetTunnelBridgeTransportType(), HasBit(), IsBridgeAbove(), TileInfo::tile, TRANSPORT_RAIL, and TRANSPORT_WATER.

◆ DrawBridgePillars()

static void DrawBridgePillars	(	const PalSpriteID *	psid,
		const TileInfo *	ti,
		Axis	axis,
		bool	drawfarpillar,
		int	x,
		int	y,
		int	z_bridge
	)

static

Draws the pillars under high bridges.

Parameters

psid	Image and palette of a bridge pillar.
ti	TileInfo of current bridge-middle-tile.
axis	Orientation of bridge.
drawfarpillar	Whether to draw the pillar at the back
x	Sprite X position of front pillar.
y	Sprite Y position of front pillar.
z_bridge	Absolute height of bridge bottom.

< bounding box size of pillars along bridge direction

< sprite position offset of back facing pillar

< big number compared to sprite size

Definition at line 1074 of file tunnelbridge_cmd.cpp.

◆ DrawBridgeRoadBits()

static void DrawBridgeRoadBits	(	TileIndex	head_tile,
		int	x,
		int	y,
		int	z,
		int	offset,
		bool	head
	)

static

Draws the road and trambits over an already drawn (lower end) of a bridge.

Parameters

head_tile	bridge head tile with roadtype information
x	the x of the bridge
y	the y of the bridge
z	the z of the bridge
offset	sprite offset identifying flat to sloped bridge tiles
head	are we drawing bridge head?

Definition at line 1156 of file tunnelbridge_cmd.cpp.

◆ DrawPillar()

static void DrawPillar	(	const PalSpriteID *	psid,
		int	x,
		int	y,
		int	z,
		int	w,
		int	h,
		const SubSprite *	subsprite
	)

inlinestatic

Draw a single pillar sprite.

Parameters

psid	Pillarsprite
x	Pillar X
y	Pillar Y
z	Pillar Z
w	Bounding box size in X direction
h	Bounding box size in Y direction
subsprite	Optional subsprite for drawing halfpillars

< Start offset of pillar wrt. bridge (downwards)

Definition at line 1037 of file tunnelbridge_cmd.cpp.

◆ DrawPillarColumn()

static int DrawPillarColumn	(	int	z_bottom,
		int	z_top,
		const PalSpriteID *	psid,
		int	x,
		int	y,
		int	w,
		int	h
	)

static

Draw two bridge pillars (north and south).

Parameters

z_bottom	Bottom Z
z_top	Top Z
psid	Pillarsprite
x	Pillar X
y	Pillar Y
w	Bounding box size in X direction
h	Bounding box size in Y direction

Returns: Reached Z at the bottom

Definition at line 1054 of file tunnelbridge_cmd.cpp.

◆ DrawTile_TunnelBridge()

static void DrawTile_TunnelBridge ( TileInfo * ti )

static

Draws a tunnel of bridge tile.

For tunnels, this is rather simple, as you only need to draw the entrance. Bridges are a bit more complex. base_offset is where the sprite selection comes into play and it works a bit like a bitmask.

For bridge heads:

Parameters

ti	TileInfo of the structure to draw Bit 0: direction Bit 1: northern or southern heads Bit 2: Set if the bridge head is sloped Bit 3 and more: Railtype Specific subset Please note that in this code, "roads" are treated as railtype 1, whilst the real railtypes are 0, 2 and 3

Definition at line 1256 of file tunnelbridge_cmd.cpp.

References RailTypeInfo::base_sprites, GetCustomRailSprite(), GetRailType(), GetRailTypeInfo(), GetTunnelBridgeDirection(), GetTunnelBridgeTransportType(), IsTunnel(), RTSG_TUNNEL_PORTAL, SPR_RAILTYPE_TUNNEL_BASE, TileInfo::tile, TRANSPORT_RAIL, and RailTypeInfo::tunnel.

◆ GetBridgeFoundation()

Foundation GetBridgeFoundation	(	Slope	tileh,
		Axis	axis
	)

Get the foundation for a bridge.

Parameters

tileh	The slope to build the bridge on.
axis	The axis of the bridge entrance.

Returns: The foundation required.

Definition at line 129 of file tunnelbridge_cmd.cpp.

References AXIS_X, AXIS_Y, FlatteningFoundation(), FOUNDATION_NONE, HasSlopeHighestCorner(), InclinedFoundation(), SLOPE_FLAT, SLOPE_NE, SLOPE_NW, SLOPE_SE, and SLOPE_SW.

Referenced by GetBridgeHeight(), and HasBridgeFlatRamp().

◆ GetBridgeRoadCatenary()

static void GetBridgeRoadCatenary	(	const RoadTypeInfo *	rti,
		TileIndex	head_tile,
		int	offset,
		bool	head,
		SpriteID &	spr_back,
		SpriteID &	spr_front
	)

static

Retrieve the sprites required for catenary on a road/tram bridge.

Parameters

	rti	RoadTypeInfo for the road or tram type to get catenary for
	head_tile	Bridge head tile with roadtype information
	offset	Sprite offset identifying flat to sloped bridge tiles
	head	Are we drawing bridge head?
[out]	spr_back	Back catenary sprite to use
[out]	spr_front	Front catenary sprite to use

Definition at line 1130 of file tunnelbridge_cmd.cpp.

References GetCustomRoadSprite(), ROTSG_CATENARY_BACK, ROTSG_CATENARY_FRONT, SPR_TRAMWAY_BASE, TCX_NORMAL, and TCX_ON_BRIDGE.

◆ HasBridgeFlatRamp()

bool HasBridgeFlatRamp	(	Slope	tileh,
		Axis	axis
	)

Determines if the track on a bridge ramp is flat or goes up/down.

Parameters

tileh	Slope of the tile under the bridge head
axis	Orientation of bridge

Returns: true iff the track is flat.

Definition at line 145 of file tunnelbridge_cmd.cpp.

References ApplyFoundationToSlope(), GetBridgeFoundation(), and SLOPE_FLAT.

Referenced by CYapfCostBase::stSlopeCost().

◆ MarkBridgeDirty() [1/2]

void MarkBridgeDirty	(	TileIndex	begin,
		TileIndex	end,
		DiagDirection	direction,
		uint	bridge_height
	)

Mark bridge tiles dirty.

Note: The bridge does not need to exist, everything is passed via parameters.

Parameters

begin	Start tile.
end	End tile.
direction	Direction from begin to end.
bridge_height	Bridge height level.

Definition at line 67 of file tunnelbridge_cmd.cpp.

References MarkTileDirtyByTile(), TileHeight(), and TileOffsByDiagDir().

Referenced by ClearPathReservation(), CmdConvertRail(), MarkBridgeDirty(), TryReserveRailTrack(), and UnreserveRailTrack().

◆ MarkBridgeDirty() [2/2]

void MarkBridgeDirty ( TileIndex tile )

Mark bridge tiles dirty.

Parameters

tile	Bridge head.

Definition at line 80 of file tunnelbridge_cmd.cpp.

References GetBridgeHeight(), GetOtherTunnelBridgeEnd(), GetTunnelBridgeDirection(), and MarkBridgeDirty().

◆ PrepareToEnterBridge()

template<typename T >

static void PrepareToEnterBridge ( T * gv )

static

Helper to prepare the ground vehicle when entering a bridge.

This get called when entering the bridge, at the last frame of travel on the bridge head. Our calling function gets called before UpdateInclination/UpdateZPosition, which normally controls the Z-coordinate. However, in the wormhole of the bridge the vehicle is in a strange state so UpdateInclination does not get called for the wormhole of the bridge and as such the going up/down bits would remain set. As such, this function clears those. In doing so, the call to UpdateInclination will not update the Z-coordinate, so that has to be done here as well.

Parameters

gv	The ground vehicle entering the bridge.

Definition at line 1868 of file tunnelbridge_cmd.cpp.

◆ TunnelBridgeClearCost()

static Money TunnelBridgeClearCost	(	TileIndex	tile,
		Price	base_price
	)

static

Calculate the base cost of clearing a tunnel/bridge per tile.

Parameters

tile	Start tile of the tunnel/bridge.

Returns: How much clearing this tunnel/bridge costs per tile.

Definition at line 224 of file tunnelbridge_cmd.cpp.

Variable Documentation

◆ _tile_type_tunnelbridge_procs

const TileTypeProcs _tile_type_tunnelbridge_procs

Initial value:

= {
  DrawTile_TunnelBridge,           
  GetSlopePixelZ_TunnelBridge,     
  ClearTile_TunnelBridge,          
  nullptr,                            
  GetTileDesc_TunnelBridge,        
  GetTileTrackStatus_TunnelBridge, 
  nullptr,                            
  nullptr,                            
  TileLoop_TunnelBridge,           
  ChangeTileOwner_TunnelBridge,    
  nullptr,                            
  VehicleEnter_TunnelBridge,       
  GetFoundation_TunnelBridge,      
  TerraformTile_TunnelBridge,      
}

Definition at line 57 of file landscape.cpp.

◆ _tunnel_visibility_frame

const uint8_t _tunnel_visibility_frame[DIAGDIR_END] = {12, 8, 8, 12}

Frame when a vehicle should be hidden in a tunnel with a certain direction.

This differs per direction, because of visibility / bounding box issues. Note that direction, in this case, is the direction leading into the tunnel. When entering a tunnel, hide the vehicle when it reaches the given frame. When leaving a tunnel, show the vehicle when it is one frame further to the 'outside', i.e. at (TILE_SIZE-1) - (frame) + 1

◆ TUNNEL_SOUND_FRAME

const uint8_t TUNNEL_SOUND_FRAME = 1

static

Frame when the 'enter tunnel' sound should be played.

This is the second frame on a tile, so the sound is played shortly after entering the tunnel tile, while the vehicle is still visible.

Definition at line 1883 of file tunnelbridge_cmd.cpp.

Functions

Variables

Detailed Description

Function Documentation

◆ CalcBridgeLenCostFactor()

◆ CalcBridgePiece()

◆ CheckAllowRemoveTunnelBridge()

◆ CheckBridgeAvailability()

◆ CheckBridgeSlope()

◆ ClearTile_TunnelBridge()

◆ CmdBuildBridge()

◆ CmdBuildTunnel()

◆ DoClearBridge()

◆ DoClearTunnel()

◆ DrawBridgeMiddle()

◆ DrawBridgePillars()

◆ DrawBridgeRoadBits()

◆ DrawPillar()

◆ DrawPillarColumn()

◆ DrawTile_TunnelBridge()

◆ GetBridgeFoundation()

◆ GetBridgeRoadCatenary()

◆ HasBridgeFlatRamp()

◆ MarkBridgeDirty() [1/2]

◆ MarkBridgeDirty() [2/2]

◆ PrepareToEnterBridge()

◆ TunnelBridgeClearCost()

Variable Documentation

◆ _tile_type_tunnelbridge_procs

◆ _tunnel_visibility_frame

◆ TUNNEL_SOUND_FRAME