bridge.h File Reference

Header file for bridges. More...

#include "gfx_type.h"
#include "tile_cmd.h"
#include "timer/timer_game_calendar.h"

Go to the source code of this file.

Data Structures
struct	BridgeSpec
	Struct containing information about a single bridge type. More...

Typedefs
typedef uint	BridgeType
	Bridge spec number.

Enumerations
enum	BridgePieces {   BRIDGE_PIECE_NORTH = 0 , BRIDGE_PIECE_SOUTH , BRIDGE_PIECE_INNER_NORTH , BRIDGE_PIECE_INNER_SOUTH ,   BRIDGE_PIECE_MIDDLE_ODD , BRIDGE_PIECE_MIDDLE_EVEN , BRIDGE_PIECE_HEAD , BRIDGE_PIECE_INVALID }
	This enum is related to the definition of bridge pieces, which is used to determine the proper sprite table to use while drawing a given bridge part.

Functions
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...
const BridgeSpec *	GetBridgeSpec (BridgeType i)
	Get the specification of a bridge type. More...
void	DrawBridgeMiddle (const TileInfo *ti)
	Draw the middle bits of a bridge. More...
CommandCost	CheckBridgeAvailability (BridgeType bridge_type, uint bridge_len, DoCommandFlag flags=DC_NONE)
	Is a bridge of the specified type and length available? More...
int	CalcBridgeLenCostFactor (int x)
	Calculate the price factor for building a long bridge. More...
void	ResetBridges ()
	Reset the data been eventually changed by the grf loaded.

Variables
static const uint	MAX_BRIDGES = 13
	Maximal number of available bridge specs.
BridgeSpec	_bridge [MAX_BRIDGES]
	The specification of all bridges.

Detailed Description

Header file for bridges.

Definition in file bridge.h.

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().

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().

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 1542 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.

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().

GetBridgeSpec()

const BridgeSpec* GetBridgeSpec ( BridgeType  i )

inline

Get the specification of a bridge type.

Parameters

i	The type of bridge to get the specification for.

Returns

The specification.

Definition at line 66 of file bridge.h.

References _bridge, and lengthof.

Referenced by CheckBridgeAvailability(), DrawBridgeMiddle(), and CFollowTrackT< Ttr_type_, VehicleType, T90deg_turns_allowed_, Tmask_reserved_tracks >::GetSpeedLimit().

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().