tron@3101: /* $Id$ */
tron@3101: 
belugas@6393: /** @file rail_map.h Hides the direct accesses to the map array with map accessors */
belugas@6393: 
tron@3101: #ifndef RAIL_MAP_H
tron@3101: #define RAIL_MAP_H
tron@3101: 
tron@3239: #include "direction.h"
tron@4041: #include "rail.h"
tron@3101: #include "tile.h"
tron@3239: 
tron@3239: 
rubidium@6540: /** Different types of Rail-related tiles */
rubidium@6248: enum RailTileType {
rubidium@6540: 	RAIL_TILE_NORMAL   = 0, ///< Normal rail tile without signals
rubidium@6540: 	RAIL_TILE_SIGNALS  = 1, ///< Normal rail tile with signals
rubidium@6540: 	RAIL_TILE_WAYPOINT = 2, ///< Waypoint (X or Y direction)
rubidium@6540: 	RAIL_TILE_DEPOT    = 3, ///< Depot (one entrance)
rubidium@6248: };
tron@3239: 
rubidium@6540: /**
rubidium@6540:  * Returns the RailTileType (normal with or without signals,
rubidium@6540:  * waypoint or depot).
rubidium@6540:  * @param t the tile to get the information from
rubidium@6540:  * @pre IsTileType(t, MP_RAILWAY)
rubidium@6540:  * @return the RailTileType
rubidium@6540:  */
tron@3239: static inline RailTileType GetRailTileType(TileIndex t)
tron@3239: {
tron@3239: 	assert(IsTileType(t, MP_RAILWAY));
rubidium@6172: 	return (RailTileType)GB(_m[t].m5, 6, 2);
tron@3239: }
tron@3239: 
tron@3772: /**
tron@3772:  * Returns whether this is plain rails, with or without signals. Iow, if this
rubidium@3792:  * tiles RailTileType is RAIL_TILE_NORMAL or RAIL_TILE_SIGNALS.
rubidium@6540:  * @param t the tile to get the information from
rubidium@6540:  * @pre IsTileType(t, MP_RAILWAY)
rubidium@6540:  * @return true if and only if the tile is normal rail (with or without signals)
tron@3772:  */
rubidium@6540: static inline bool IsPlainRailTile(TileIndex t)
tron@3772: {
rubidium@6540: 	RailTileType rtt = GetRailTileType(t);
rubidium@3792: 	return rtt == RAIL_TILE_NORMAL || rtt == RAIL_TILE_SIGNALS;
tron@3772: }
tron@3772: 
tron@3772: /**
tron@3772:  * Checks if a rail tile has signals.
rubidium@6540:  * @param t the tile to get the information from
rubidium@6540:  * @pre IsTileType(t, MP_RAILWAY)
rubidium@6540:  * @return true if and only if the tile has signals
tron@3772:  */
rubidium@6540: static inline bool HasSignals(TileIndex t)
tron@3772: {
rubidium@6540: 	return GetRailTileType(t) == RAIL_TILE_SIGNALS;
tron@3772: }
tron@3772: 
tron@3772: /**
rubidium@6172:  * Add/remove the 'has signal' bit from the RailTileType
rubidium@6540:  * @param tile the tile to add/remove the signals to/from
rubidium@6540:  * @param signals whether the rail tile should have signals or not
rubidium@6540:  * @pre IsPlainRailTile(tile)
tron@3772:  */
rubidium@6172: static inline void SetHasSignals(TileIndex tile, bool signals)
tron@3772: {
rubidium@6172: 	assert(IsPlainRailTile(tile));
rubidium@6172: 	SB(_m[tile].m5, 6, 1, signals);
tron@3772: }
tron@3772: 
rubidium@6540: /**
rubidium@6540:  * Is this tile a rail depot?
rubidium@6540:  * @param t the tile to get the information from
rubidium@6540:  * @pre IsTileType(t, MP_RAILWAY)
rubidium@6540:  * @return true if and only if the tile is a rail depot
rubidium@6540:  */
tron@4182: static inline bool IsRailDepot(TileIndex t)
tron@4182: {
rubidium@6172: 	return GetRailTileType(t) == RAIL_TILE_DEPOT;
tron@4182: }
tron@4182: 
rubidium@6540: /**
rubidium@6540:  * Is this tile a rail waypoint?
rubidium@6540:  * @param t the tile to get the information from
rubidium@6540:  * @pre IsTileType(t, MP_RAILWAY)
rubidium@6540:  * @return true if and only if the tile is a rail waypoint
rubidium@6540:  */
tron@4044: static inline bool IsRailWaypoint(TileIndex t)
tron@4044: {
rubidium@6172: 	return GetRailTileType(t) == RAIL_TILE_WAYPOINT;
tron@4044: }
tron@4044: 
tron@4044: 
rubidium@6540: /**
rubidium@6540:  * Gets the rail type of the given tile
rubidium@6540:  * @param t the tile to get the rail type from
rubidium@6540:  * @return the rail type of the tile
rubidium@6540:  */
tron@3239: static inline RailType GetRailType(TileIndex t)
tron@3239: {
tron@3239: 	return (RailType)GB(_m[t].m3, 0, 4);
tron@3239: }
tron@3239: 
rubidium@6540: /**
rubidium@6540:  * Sets the track bits of the given tile
rubidium@6540:  * @param t the tile to set the track bits of
rubidium@6540:  * @param r the new track bits for the tile
rubidium@6540:  */
tron@3242: static inline void SetRailType(TileIndex t, RailType r)
tron@3242: {
tron@3242: 	SB(_m[t].m3, 0, 4, r);
tron@3242: }
tron@3242: 
tron@3239: 
rubidium@6540: /**
rubidium@6540:  * Gets the rail type of the given tile
rubidium@6540:  * @param t the tile to get the rail type from
rubidium@6540:  * @return the rail type of the tile
rubidium@6540:  */
tron@3267: static inline TrackBits GetTrackBits(TileIndex tile)
tron@3267: {
tron@3267: 	return (TrackBits)GB(_m[tile].m5, 0, 6);
tron@3267: }
tron@3267: 
rubidium@6540: /**
rubidium@6540:  * Sets the track bits of the given tile
rubidium@6540:  * @param t the tile to set the track bits of
rubidium@6540:  * @param b the new track bits for the tile
rubidium@6540:  */
tron@3273: static inline void SetTrackBits(TileIndex t, TrackBits b)
tron@3273: {
tron@3273: 	SB(_m[t].m5, 0, 6, b);
tron@3273: }
tron@3273: 
tron@3772: /**
rubidium@6540:  * Returns whether the given track is present on the given tile.
rubidium@6540:  * @param tile  the tile to check the track presence of
rubidium@6540:  * @param track the track to search for on the tile
rubidium@6540:  * @pre IsPlainRailTile(tile)
rubidium@6540:  * @return true if and only if the given track exists on the tile
tron@3772:  */
tron@3772: static inline bool HasTrack(TileIndex tile, Track track)
tron@3772: {
tron@3772: 	return HASBIT(GetTrackBits(tile), track);
tron@3772: }
tron@3772: 
rubidium@6540: /**
rubidium@6540:  * Returns the direction the depot is facing to
rubidium@6540:  * @param t the tile to get the depot facing from
rubidium@6540:  * @pre IsRailDepotTile(t)
rubidium@6540:  * @return the direction the depot is facing
rubidium@6540:  */
tron@3185: static inline DiagDirection GetRailDepotDirection(TileIndex t)
tron@3185: {
tron@3185: 	return (DiagDirection)GB(_m[t].m5, 0, 2);
tron@3185: }
tron@3185: 
tron@4158: 
rubidium@6540: /**
rubidium@6540:  * Returns the axis of the waypoint
rubidium@6540:  * @param t the tile to get the waypoint axis from
rubidium@6540:  * @pre IsRailWaypointTile(t)
rubidium@6540:  * @return the axis of the waypoint
rubidium@6540:  */
tron@4158: static inline Axis GetWaypointAxis(TileIndex t)
tron@4158: {
tron@4474: 	return (Axis)GB(_m[t].m5, 0, 1);
tron@4158: }
tron@4158: 
rubidium@6540: /**
rubidium@6540:  * Returns the track of the waypoint
rubidium@6540:  * @param t the tile to get the waypoint track from
rubidium@6540:  * @pre IsRailWaypointTile(t)
rubidium@6540:  * @return the track of the waypoint
rubidium@6540:  */
celestar@3453: static inline Track GetRailWaypointTrack(TileIndex t)
celestar@3448: {
tron@4158: 	return AxisToTrack(GetWaypointAxis(t));
celestar@3448: }
tron@3185: 
rubidium@6540: /**
rubidium@6540:  * Returns the track bits of the waypoint
rubidium@6540:  * @param t the tile to get the waypoint track bits from
rubidium@6540:  * @pre IsRailWaypointTile(t)
rubidium@6540:  * @return the track bits of the waypoint
rubidium@6540:  */
tron@3101: static inline TrackBits GetRailWaypointBits(TileIndex t)
tron@3101: {
tron@4158: 	return TrackToTrackBits(GetRailWaypointTrack(t));
celestar@3528: }
celestar@3528: 
rubidium@6540: /**
rubidium@6540:  * Returns waypoint index (for the waypoint pool)
rubidium@6540:  * @param t the tile to get the waypoint index from
rubidium@6540:  * @pre IsRailWaypointTile(t)
rubidium@6540:  * @return the waypoint index
rubidium@6540:  */
rubidium@6182: static inline WaypointID GetWaypointIndex(TileIndex t)
rubidium@6182: {
rubidium@6182: 	return (WaypointID)_m[t].m2;
rubidium@6182: }
tron@3101: 
rubidium@6540: /** Type of signal, i.e. how does the signal behave? */
rubidium@6248: enum SignalType {
rubidium@6540: 	SIGTYPE_NORMAL  = 0, ///< normal signal
rubidium@6540: 	SIGTYPE_ENTRY   = 1, ///< presignal block entry
rubidium@6540: 	SIGTYPE_EXIT    = 2, ///< presignal block exit
rubidium@6540: 	SIGTYPE_COMBO   = 3  ///< presignal inter-block
rubidium@6248: };
tron@3238: 
tron@3238: static inline SignalType GetSignalType(TileIndex t)
tron@3238: {
rubidium@3792: 	assert(GetRailTileType(t) == RAIL_TILE_SIGNALS);
rubidium@6172: 	return (SignalType)GB(_m[t].m2, 0, 2);
tron@3238: }
tron@3238: 
tron@3238: static inline void SetSignalType(TileIndex t, SignalType s)
tron@3238: {
rubidium@3792: 	assert(GetRailTileType(t) == RAIL_TILE_SIGNALS);
rubidium@6172: 	SB(_m[t].m2, 0, 2, s);
tron@3238: }
tron@3238: 
celestar@3521: static inline bool IsPresignalEntry(TileIndex t)
celestar@3521: {
celestar@3521: 	return GetSignalType(t) == SIGTYPE_ENTRY || GetSignalType(t) == SIGTYPE_COMBO;
celestar@3521: }
celestar@3521: 
celestar@3521: static inline bool IsPresignalExit(TileIndex t)
celestar@3521: {
celestar@3521: 	return GetSignalType(t) == SIGTYPE_EXIT || GetSignalType(t) == SIGTYPE_COMBO;
celestar@3521: }
celestar@3521: 
celestar@3522: static inline void CycleSignalSide(TileIndex t, Track track)
celestar@3522: {
celestar@3522: 	byte sig;
celestar@3522: 	byte pos = 6;
celestar@3522: 	if (track == TRACK_LOWER || track == TRACK_RIGHT) pos = 4;
celestar@3522: 
celestar@3522: 	sig = GB(_m[t].m3, pos, 2);
celestar@3522: 	if (--sig == 0) sig = 3;
celestar@3522: 	SB(_m[t].m3, pos, 2, sig);
celestar@3522: }
celestar@3522: 
rubidium@6540: /** Variant of the signal, i.e. how does the signal look? */
rubidium@6248: enum SignalVariant {
rubidium@6540: 	SIG_ELECTRIC  = 0, ///< Light signal
rubidium@6540: 	SIG_SEMAPHORE = 1  ///< Old-fashioned semaphore signal
rubidium@6248: };
tron@3237: 
tron@3237: static inline SignalVariant GetSignalVariant(TileIndex t)
tron@3237: {
rubidium@6172: 	return (SignalVariant)GB(_m[t].m2, 2, 1);
tron@3237: }
tron@3237: 
tron@3237: static inline void SetSignalVariant(TileIndex t, SignalVariant v)
tron@3237: {
rubidium@6172: 	SB(_m[t].m2, 2, 1, v);
tron@3237: }
tron@3237: 
celestar@3575: /** These are states in which a signal can be. Currently these are only two, so
celestar@3575:  * simple boolean logic will do. But do try to compare to this enum instead of
celestar@3575:  * normal boolean evaluation, since that will make future additions easier.
celestar@3575:  */
rubidium@6248: enum SignalState {
rubidium@6540: 	SIGNAL_STATE_RED   = 0, ///< The signal is red
rubidium@6540: 	SIGNAL_STATE_GREEN = 1, ///< The signal is green
rubidium@6248: };
celestar@3575: 
rubidium@6753: /**
rubidium@6753:  * Set the states of the signals (Along/AgainstTrackDir)
rubidium@6753:  * @param tile  the tile to set the states for
rubidium@6753:  * @param state the new state
rubidium@6753:  */
rubidium@6753: static inline void SetSignalStates(TileIndex tile, uint state)
rubidium@6753: {
rubidium@6753: 	SB(_m[tile].m2, 4, 4, state);
rubidium@6753: }
rubidium@6753: 
rubidium@6753: /**
rubidium@6753:  * Set the states of the signals (Along/AgainstTrackDir)
rubidium@6753:  * @param tile  the tile to set the states for
rubidium@6753:  * @param state the new state
rubidium@6753:  */
rubidium@6753: static inline uint GetSignalStates(TileIndex tile)
rubidium@6753: {
rubidium@6753: 	return GB(_m[tile].m2, 4, 4);
rubidium@6753: }
rubidium@6753: 
rubidium@6753: /**
rubidium@6753:  * Get the state of a single signal
rubidium@6753:  * @param t         the tile to get the signal state for
rubidium@6753:  * @param signalbit the signal
rubidium@6753:  * @return the state of the signal
rubidium@6753:  */
celestar@3575: static inline SignalState GetSingleSignalState(TileIndex t, byte signalbit)
celestar@3575: {
rubidium@6753: 	return (SignalState)HASBIT(GetSignalStates(t), signalbit);
celestar@3575: }
celestar@3575: 
rubidium@6753: /**
rubidium@6753:  * Set whether the given signals are present (Along/AgainstTrackDir)
rubidium@6753:  * @param tile    the tile to set the present signals for
rubidium@6753:  * @param signals the signals that have to be present
rubidium@6753:  */
rubidium@6753: static inline void SetPresentSignals(TileIndex tile, uint signals)
rubidium@6753: {
rubidium@6753: 	SB(_m[tile].m3, 4, 4, signals);
rubidium@6753: }
rubidium@6753: 
rubidium@6753: /**
rubidium@6753:  * Get whether the given signals are present (Along/AgainstTrackDir)
rubidium@6753:  * @param tile the tile to get the present signals for
rubidium@6753:  * @return the signals that are present
rubidium@6753:  */
rubidium@6753: static inline uint GetPresentSignals(TileIndex tile)
rubidium@6753: {
rubidium@6753: 	return GB(_m[tile].m3, 4, 4);
rubidium@6753: }
rubidium@6753: 
rubidium@6753: /**
rubidium@6753:  * Checks whether the given signals is present
rubidium@6753:  * @param t         the tile to check on
rubidium@6753:  * @param signalbit the signal
rubidium@6753:  * @return true if and only if the signal is present
rubidium@6753:  */
rubidium@6753: static inline bool IsSignalPresent(TileIndex t, byte signalbit)
rubidium@6753: {
rubidium@6753: 	return HASBIT(GetPresentSignals(t), signalbit);
rubidium@6753: }
tron@3237: 
tron@4041: /**
tron@4041:  * Checks for the presence of signals (either way) on the given track on the
tron@4041:  * given rail tile.
tron@4041:  */
tron@4041: static inline bool HasSignalOnTrack(TileIndex tile, Track track)
tron@4041: {
tron@4041: 	assert(IsValidTrack(track));
tron@4041: 	return
tron@4041: 		GetRailTileType(tile) == RAIL_TILE_SIGNALS &&
rubidium@6753: 		(GetPresentSignals(tile) & SignalOnTrack(track)) != 0;
tron@4041: }
tron@4041: 
tron@4041: /**
tron@4041:  * Checks for the presence of signals along the given trackdir on the given
tron@4041:  * rail tile.
tron@4041:  *
tron@4041:  * Along meaning if you are currently driving on the given trackdir, this is
tron@4041:  * the signal that is facing us (for which we stop when it's red).
tron@4041:  */
tron@4041: static inline bool HasSignalOnTrackdir(TileIndex tile, Trackdir trackdir)
tron@4041: {
tron@4041: 	assert (IsValidTrackdir(trackdir));
tron@4041: 	return
tron@4041: 		GetRailTileType(tile) == RAIL_TILE_SIGNALS &&
rubidium@6753: 		GetPresentSignals(tile) & SignalAlongTrackdir(trackdir);
tron@4041: }
tron@4041: 
tron@4041: /**
tron@4041:  * Gets the state of the signal along the given trackdir.
tron@4041:  *
tron@4041:  * Along meaning if you are currently driving on the given trackdir, this is
tron@4041:  * the signal that is facing us (for which we stop when it's red).
tron@4041:  */
tron@4041: static inline SignalState GetSignalStateByTrackdir(TileIndex tile, Trackdir trackdir)
tron@4041: {
tron@4041: 	assert(IsValidTrackdir(trackdir));
tron@4041: 	assert(HasSignalOnTrack(tile, TrackdirToTrack(trackdir)));
rubidium@6753: 	return GetSignalStates(tile) & SignalAlongTrackdir(trackdir) ?
tron@4041: 		SIGNAL_STATE_GREEN : SIGNAL_STATE_RED;
tron@4041: }
tron@4041: 
tron@4041: 
tron@4041: /**
tron@4041:  * Return the rail type of tile, or INVALID_RAILTYPE if this is no rail tile.
tron@4041:  */
tron@6154: RailType GetTileRailType(TileIndex tile);
tron@4041: 
rubidium@6540: /** The ground 'under' the rail */
rubidium@6248: enum RailGroundType {
rubidium@6540: 	RAIL_GROUND_BARREN       =  0, ///< Nothing (dirt)
rubidium@6540: 	RAIL_GROUND_GRASS        =  1, ///< Grassy
rubidium@6540: 	RAIL_GROUND_FENCE_NW     =  2, ///< Grass with a fence at the NW edge
rubidium@6540: 	RAIL_GROUND_FENCE_SE     =  3, ///< Grass with a fence at the SE edge
rubidium@6540: 	RAIL_GROUND_FENCE_SENW   =  4, ///< Grass with a fence at the NW and SE edges
rubidium@6540: 	RAIL_GROUND_FENCE_NE     =  5, ///< Grass with a fence at the NE edge
rubidium@6540: 	RAIL_GROUND_FENCE_SW     =  6, ///< Grass with a fence at the SW edge
rubidium@6540: 	RAIL_GROUND_FENCE_NESW   =  7, ///< Grass with a fence at the NE and SW edges
rubidium@6540: 	RAIL_GROUND_FENCE_VERT1  =  8, ///< Grass with a fence at the western side
rubidium@6540: 	RAIL_GROUND_FENCE_VERT2  =  9, ///< Grass with a fence at the eastern side
rubidium@6540: 	RAIL_GROUND_FENCE_HORIZ1 = 10, ///< Grass with a fence at the southern side
rubidium@6540: 	RAIL_GROUND_FENCE_HORIZ2 = 11, ///< Grass with a fence at the northern side
rubidium@6540: 	RAIL_GROUND_ICE_DESERT   = 12, ///< Icy or sandy
rubidium@6248: };
celestar@3523: 
celestar@3523: static inline void SetRailGroundType(TileIndex t, RailGroundType rgt)
celestar@3523: {
rubidium@6172: 	SB(_m[t].m4, 0, 4, rgt);
celestar@3523: }
celestar@3523: 
celestar@3523: static inline RailGroundType GetRailGroundType(TileIndex t)
celestar@3523: {
rubidium@6172: 	return (RailGroundType)GB(_m[t].m4, 0, 4);
celestar@3523: }
celestar@3523: 
celestar@3523: static inline bool IsSnowRailGround(TileIndex t)
celestar@3523: {
celestar@3523: 	return GetRailGroundType(t) == RAIL_GROUND_ICE_DESERT;
celestar@3523: }
celestar@3523: 
celestar@3523: 
tron@3101: static inline void MakeRailNormal(TileIndex t, Owner o, TrackBits b, RailType r)
tron@3101: {
tron@3101: 	SetTileType(t, MP_RAILWAY);
tron@3101: 	SetTileOwner(t, o);
tron@3101: 	_m[t].m2 = 0;
tron@3101: 	_m[t].m3 = r;
tron@3101: 	_m[t].m4 = 0;
rubidium@6172: 	_m[t].m5 = RAIL_TILE_NORMAL << 6 | b;
tron@3101: }
tron@3101: 
tron@3101: 
tron@3101: static inline void MakeRailDepot(TileIndex t, Owner o, DiagDirection d, RailType r)
tron@3101: {
tron@3101: 	SetTileType(t, MP_RAILWAY);
tron@3101: 	SetTileOwner(t, o);
tron@3101: 	_m[t].m2 = 0;
tron@3101: 	_m[t].m3 = r;
tron@3101: 	_m[t].m4 = 0;
rubidium@6172: 	_m[t].m5 = RAIL_TILE_DEPOT << 6 | d;
tron@3101: }
tron@3101: 
tron@3101: 
tron@3101: static inline void MakeRailWaypoint(TileIndex t, Owner o, Axis a, RailType r, uint index)
tron@3101: {
tron@3101: 	SetTileType(t, MP_RAILWAY);
tron@3101: 	SetTileOwner(t, o);
tron@3101: 	_m[t].m2 = index;
tron@3101: 	_m[t].m3 = r;
tron@3101: 	_m[t].m4 = 0;
rubidium@6172: 	_m[t].m5 = RAIL_TILE_WAYPOINT << 6 | a;
tron@3101: }
tron@3101: 
peter1138@4666: #endif /* RAIL_MAP_H */