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Location: cpp/openttd-patchpack/source/src/rail_map.h - annotation
r11645:44e7d4260786
17.6 KiB
text/x-c
(svn r16030) -Update: WebTranslator2 update to 2009-04-11 17:38:26
serbian - 50 fixed by etran (50)
traditional_chinese - 6 fixed, 2 changed by josesun (8)
serbian - 50 fixed by etran (50)
traditional_chinese - 6 fixed, 2 changed by josesun (8)
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/** @file rail_map.h Hides the direct accesses to the map array with map accessors */
#ifndef RAIL_MAP_H
#define RAIL_MAP_H
#include "rail_type.h"
#include "signal_func.h"
#include "direction_func.h"
#include "track_func.h"
#include "tile_map.h"
#include "signal_type.h"
#include "waypoint_type.h"
/** Different types of Rail-related tiles */
enum RailTileType {
RAIL_TILE_NORMAL = 0, ///< Normal rail tile without signals
RAIL_TILE_SIGNALS = 1, ///< Normal rail tile with signals
RAIL_TILE_WAYPOINT = 2, ///< Waypoint (X or Y direction)
RAIL_TILE_DEPOT = 3, ///< Depot (one entrance)
};
/**
* Returns the RailTileType (normal with or without signals,
* waypoint or depot).
* @param t the tile to get the information from
* @pre IsTileType(t, MP_RAILWAY)
* @return the RailTileType
*/
static inline RailTileType GetRailTileType(TileIndex t)
{
assert(IsTileType(t, MP_RAILWAY));
return (RailTileType)GB(_m[t].m5, 6, 2);
}
/**
* Returns whether this is plain rails, with or without signals. Iow, if this
* tiles RailTileType is RAIL_TILE_NORMAL or RAIL_TILE_SIGNALS.
* @param t the tile to get the information from
* @pre IsTileType(t, MP_RAILWAY)
* @return true if and only if the tile is normal rail (with or without signals)
*/
static inline bool IsPlainRailTile(TileIndex t)
{
RailTileType rtt = GetRailTileType(t);
return rtt == RAIL_TILE_NORMAL || rtt == RAIL_TILE_SIGNALS;
}
/**
* Checks if a rail tile has signals.
* @param t the tile to get the information from
* @pre IsTileType(t, MP_RAILWAY)
* @return true if and only if the tile has signals
*/
static inline bool HasSignals(TileIndex t)
{
return GetRailTileType(t) == RAIL_TILE_SIGNALS;
}
/**
* Add/remove the 'has signal' bit from the RailTileType
* @param tile the tile to add/remove the signals to/from
* @param signals whether the rail tile should have signals or not
* @pre IsPlainRailTile(tile)
*/
static inline void SetHasSignals(TileIndex tile, bool signals)
{
assert(IsPlainRailTile(tile));
SB(_m[tile].m5, 6, 1, signals);
}
/**
* Is this rail tile a rail waypoint?
* @param t the tile to get the information from
* @pre IsTileType(t, MP_RAILWAY)
* @return true if and only if the tile is a rail waypoint
*/
static inline bool IsRailWaypoint(TileIndex t)
{
return GetRailTileType(t) == RAIL_TILE_WAYPOINT;
}
/**
* Is this tile rail tile and a rail waypoint?
* @param t the tile to get the information from
* @return true if and only if the tile is a rail waypoint
*/
static inline bool IsRailWaypointTile(TileIndex t)
{
return IsTileType(t, MP_RAILWAY) && IsRailWaypoint(t);
}
/**
* Is this rail tile a rail depot?
* @param t the tile to get the information from
* @pre IsTileType(t, MP_RAILWAY)
* @return true if and only if the tile is a rail depot
*/
static inline bool IsRailDepot(TileIndex t)
{
return GetRailTileType(t) == RAIL_TILE_DEPOT;
}
/**
* Is this tile rail tile and a rail depot?
* @param t the tile to get the information from
* @return true if and only if the tile is a rail depot
*/
static inline bool IsRailDepotTile(TileIndex t)
{
return IsTileType(t, MP_RAILWAY) && IsRailDepot(t);
}
/**
* Gets the rail type of the given tile
* @param t the tile to get the rail type from
* @return the rail type of the tile
*/
static inline RailType GetRailType(TileIndex t)
{
return (RailType)GB(_m[t].m3, 0, 4);
}
/**
* Sets the rail type of the given tile
* @param t the tile to set the rail type of
* @param r the new rail type for the tile
*/
static inline void SetRailType(TileIndex t, RailType r)
{
SB(_m[t].m3, 0, 4, r);
}
/**
* Gets the track bits of the given tile
* @param t the tile to get the track bits from
* @return the track bits of the tile
*/
static inline TrackBits GetTrackBits(TileIndex tile)
{
return (TrackBits)GB(_m[tile].m5, 0, 6);
}
/**
* Sets the track bits of the given tile
* @param t the tile to set the track bits of
* @param b the new track bits for the tile
*/
static inline void SetTrackBits(TileIndex t, TrackBits b)
{
SB(_m[t].m5, 0, 6, b);
}
/**
* Returns whether the given track is present on the given tile.
* @param tile the tile to check the track presence of
* @param track the track to search for on the tile
* @pre IsPlainRailTile(tile)
* @return true if and only if the given track exists on the tile
*/
static inline bool HasTrack(TileIndex tile, Track track)
{
return HasBit(GetTrackBits(tile), track);
}
/**
* Returns the direction the depot is facing to
* @param t the tile to get the depot facing from
* @pre IsRailDepotTile(t)
* @return the direction the depot is facing
*/
static inline DiagDirection GetRailDepotDirection(TileIndex t)
{
return (DiagDirection)GB(_m[t].m5, 0, 2);
}
/**
* Returns the track of a depot, ignoring direction
* @pre IsRailDepotTile(t)
* @param t the tile to get the depot track from
* @return the track of the depot
*/
static inline Track GetRailDepotTrack(TileIndex t)
{
return DiagDirToDiagTrack(GetRailDepotDirection(t));
}
/**
* Returns the axis of the waypoint
* @param t the tile to get the waypoint axis from
* @pre IsRailWaypointTile(t)
* @return the axis of the waypoint
*/
static inline Axis GetWaypointAxis(TileIndex t)
{
return (Axis)GB(_m[t].m5, 0, 1);
}
/**
* Returns the track of the waypoint
* @param t the tile to get the waypoint track from
* @pre IsRailWaypointTile(t)
* @return the track of the waypoint
*/
static inline Track GetRailWaypointTrack(TileIndex t)
{
return AxisToTrack(GetWaypointAxis(t));
}
/**
* Returns the track bits of the waypoint
* @param t the tile to get the waypoint track bits from
* @pre IsRailWaypointTile(t)
* @return the track bits of the waypoint
*/
static inline TrackBits GetRailWaypointBits(TileIndex t)
{
return TrackToTrackBits(GetRailWaypointTrack(t));
}
/**
* Returns waypoint index (for the waypoint pool)
* @param t the tile to get the waypoint index from
* @pre IsRailWaypointTile(t)
* @return the waypoint index
*/
static inline WaypointID GetWaypointIndex(TileIndex t)
{
return (WaypointID)_m[t].m2;
}
/**
* Returns the reserved track bits of the tile
* @pre IsPlainRailTile(t)
* @param t the tile to query
* @return the track bits
*/
static inline TrackBits GetTrackReservation(TileIndex t)
{
assert(IsPlainRailTile(t));
byte track_b = GB(_m[t].m2, 8, 3);
Track track = (Track)(track_b - 1); // map array saves Track+1
if (track_b == 0) return TRACK_BIT_NONE;
return (TrackBits)(TrackToTrackBits(track) | (HasBit(_m[t].m2, 11) ? TrackToTrackBits(TrackToOppositeTrack(track)) : 0));
}
/**
* Sets the reserved track bits of the tile
* @pre IsPlainRailTile(t) && !TracksOverlap(b)
* @param t the tile to change
* @param b the track bits
*/
static inline void SetTrackReservation(TileIndex t, TrackBits b)
{
assert(IsPlainRailTile(t));
assert(b != INVALID_TRACK_BIT);
assert(!TracksOverlap(b));
Track track = RemoveFirstTrack(&b);
SB(_m[t].m2, 8, 3, track == INVALID_TRACK ? 0 : track+1);
SB(_m[t].m2, 11, 1, (byte)(b != TRACK_BIT_NONE));
}
/**
* Try to reserve a specific track on a tile
* @pre IsPlainRailTile(t) && HasTrack(tile, t)
* @param tile the tile
* @param t the rack to reserve
* @return true if successful
*/
static inline bool TryReserveTrack(TileIndex tile, Track t)
{
assert(HasTrack(tile, t));
TrackBits bits = TrackToTrackBits(t);
TrackBits res = GetTrackReservation(tile);
if ((res & bits) != TRACK_BIT_NONE) return false; // already reserved
res |= bits;
if (TracksOverlap(res)) return false; // crossing reservation present
SetTrackReservation(tile, res);
return true;
}
/**
* Lift the reservation of a specific track on a tile
* @pre IsPlainRailTile(t) && HasTrack(tile, t)
* @param tile the tile
* @param t the track to free
*/
static inline void UnreserveTrack(TileIndex tile, Track t)
{
assert(HasTrack(tile, t));
TrackBits res = GetTrackReservation(tile);
res &= ~TrackToTrackBits(t);
SetTrackReservation(tile, res);
}
/**
* Get the reservation state of the waypoint or depot
* @note Works for both waypoints and rail depots
* @pre IsRailWaypoint(t) || IsRailDepot(t)
* @param t the waypoint/depot tile
* @return reservation state
*/
static inline bool GetDepotWaypointReservation(TileIndex t)
{
assert(IsRailWaypoint(t) || IsRailDepot(t));
return HasBit(_m[t].m5, 4);
}
/**
* Set the reservation state of the waypoint or depot
* @note Works for both waypoints and rail depots
* @pre IsRailWaypoint(t) || IsRailDepot(t)
* @param t the waypoint/depot tile
* @param b the reservation state
*/
static inline void SetDepotWaypointReservation(TileIndex t, bool b)
{
assert(IsRailWaypoint(t) || IsRailDepot(t));
SB(_m[t].m5, 4, 1, (byte)b);
}
/**
* Get the reserved track bits for a waypoint
* @pre IsRailWaypoint(t)
* @param t the tile
* @return reserved track bits
*/
static inline TrackBits GetRailWaypointReservation(TileIndex t)
{
return GetDepotWaypointReservation(t) ? GetRailWaypointBits(t) : TRACK_BIT_NONE;
}
/**
* Get the reserved track bits for a depot
* @pre IsRailDepot(t)
* @param t the tile
* @return reserved track bits
*/
static inline TrackBits GetRailDepotReservation(TileIndex t)
{
return GetDepotWaypointReservation(t) ? TrackToTrackBits(GetRailDepotTrack(t)) : TRACK_BIT_NONE;
}
static inline bool IsPbsSignal(SignalType s)
{
return s == SIGTYPE_PBS || s == SIGTYPE_PBS_ONEWAY;
}
static inline SignalType GetSignalType(TileIndex t, Track track)
{
assert(GetRailTileType(t) == RAIL_TILE_SIGNALS);
byte pos = (track == TRACK_LOWER || track == TRACK_RIGHT) ? 4 : 0;
return (SignalType)GB(_m[t].m2, pos, 3);
}
static inline void SetSignalType(TileIndex t, Track track, SignalType s)
{
assert(GetRailTileType(t) == RAIL_TILE_SIGNALS);
byte pos = (track == TRACK_LOWER || track == TRACK_RIGHT) ? 4 : 0;
SB(_m[t].m2, pos, 3, s);
if (track == INVALID_TRACK) SB(_m[t].m2, 4, 3, s);
}
static inline bool IsPresignalEntry(TileIndex t, Track track)
{
return GetSignalType(t, track) == SIGTYPE_ENTRY || GetSignalType(t, track) == SIGTYPE_COMBO;
}
static inline bool IsPresignalExit(TileIndex t, Track track)
{
return GetSignalType(t, track) == SIGTYPE_EXIT || GetSignalType(t, track) == SIGTYPE_COMBO;
}
/** One-way signals can't be passed the 'wrong' way. */
static inline bool IsOnewaySignal(TileIndex t, Track track)
{
return GetSignalType(t, track) != SIGTYPE_PBS;
}
static inline void CycleSignalSide(TileIndex t, Track track)
{
byte sig;
byte pos = (track == TRACK_LOWER || track == TRACK_RIGHT) ? 4 : 6;
sig = GB(_m[t].m3, pos, 2);
if (--sig == 0) sig = IsPbsSignal(GetSignalType(t, track)) ? 2 : 3;
SB(_m[t].m3, pos, 2, sig);
}
static inline SignalVariant GetSignalVariant(TileIndex t, Track track)
{
byte pos = (track == TRACK_LOWER || track == TRACK_RIGHT) ? 7 : 3;
return (SignalVariant)GB(_m[t].m2, pos, 1);
}
static inline void SetSignalVariant(TileIndex t, Track track, SignalVariant v)
{
byte pos = (track == TRACK_LOWER || track == TRACK_RIGHT) ? 7 : 3;
SB(_m[t].m2, pos, 1, v);
if (track == INVALID_TRACK) SB(_m[t].m2, 7, 1, v);
}
/** These are states in which a signal can be. Currently these are only two, so
* simple boolean logic will do. But do try to compare to this enum instead of
* normal boolean evaluation, since that will make future additions easier.
*/
enum SignalState {
SIGNAL_STATE_RED = 0, ///< The signal is red
SIGNAL_STATE_GREEN = 1, ///< The signal is green
};
/**
* Set the states of the signals (Along/AgainstTrackDir)
* @param tile the tile to set the states for
* @param state the new state
*/
static inline void SetSignalStates(TileIndex tile, uint state)
{
SB(_m[tile].m4, 4, 4, state);
}
/**
* Set the states of the signals (Along/AgainstTrackDir)
* @param tile the tile to set the states for
* @param state the new state
*/
static inline uint GetSignalStates(TileIndex tile)
{
return GB(_m[tile].m4, 4, 4);
}
/**
* Get the state of a single signal
* @param t the tile to get the signal state for
* @param signalbit the signal
* @return the state of the signal
*/
static inline SignalState GetSingleSignalState(TileIndex t, byte signalbit)
{
return (SignalState)HasBit(GetSignalStates(t), signalbit);
}
/**
* Set whether the given signals are present (Along/AgainstTrackDir)
* @param tile the tile to set the present signals for
* @param signals the signals that have to be present
*/
static inline void SetPresentSignals(TileIndex tile, uint signals)
{
SB(_m[tile].m3, 4, 4, signals);
}
/**
* Get whether the given signals are present (Along/AgainstTrackDir)
* @param tile the tile to get the present signals for
* @return the signals that are present
*/
static inline uint GetPresentSignals(TileIndex tile)
{
return GB(_m[tile].m3, 4, 4);
}
/**
* Checks whether the given signals is present
* @param t the tile to check on
* @param signalbit the signal
* @return true if and only if the signal is present
*/
static inline bool IsSignalPresent(TileIndex t, byte signalbit)
{
return HasBit(GetPresentSignals(t), signalbit);
}
/**
* Checks for the presence of signals (either way) on the given track on the
* given rail tile.
*/
static inline bool HasSignalOnTrack(TileIndex tile, Track track)
{
assert(IsValidTrack(track));
return
GetRailTileType(tile) == RAIL_TILE_SIGNALS &&
(GetPresentSignals(tile) & SignalOnTrack(track)) != 0;
}
/**
* Checks for the presence of signals along the given trackdir on the given
* rail tile.
*
* Along meaning if you are currently driving on the given trackdir, this is
* the signal that is facing us (for which we stop when it's red).
*/
static inline bool HasSignalOnTrackdir(TileIndex tile, Trackdir trackdir)
{
assert (IsValidTrackdir(trackdir));
return
GetRailTileType(tile) == RAIL_TILE_SIGNALS &&
GetPresentSignals(tile) & SignalAlongTrackdir(trackdir);
}
/**
* Gets the state of the signal along the given trackdir.
*
* Along meaning if you are currently driving on the given trackdir, this is
* the signal that is facing us (for which we stop when it's red).
*/
static inline SignalState GetSignalStateByTrackdir(TileIndex tile, Trackdir trackdir)
{
assert(IsValidTrackdir(trackdir));
assert(HasSignalOnTrack(tile, TrackdirToTrack(trackdir)));
return GetSignalStates(tile) & SignalAlongTrackdir(trackdir) ?
SIGNAL_STATE_GREEN : SIGNAL_STATE_RED;
}
/**
* Sets the state of the signal along the given trackdir.
*/
static inline void SetSignalStateByTrackdir(TileIndex tile, Trackdir trackdir, SignalState state)
{
if (state == SIGNAL_STATE_GREEN) { // set 1
SetSignalStates(tile, GetSignalStates(tile) | SignalAlongTrackdir(trackdir));
} else {
SetSignalStates(tile, GetSignalStates(tile) & ~SignalAlongTrackdir(trackdir));
}
}
/**
* Is a pbs signal present along the trackdir?
* @param tile the tile to check
* @param td the trackdir to check
*/
static inline bool HasPbsSignalOnTrackdir(TileIndex tile, Trackdir td)
{
return
IsTileType(tile, MP_RAILWAY) &&
HasSignalOnTrackdir(tile, td) &&
IsPbsSignal(GetSignalType(tile, TrackdirToTrack(td)));
}
/**
* Is a one-way signal blocking the trackdir? A one-way signal on the
* trackdir against will block, but signals on both trackdirs won't.
* @param tile the tile to check
* @param td the trackdir to check
*/
static inline bool HasOnewaySignalBlockingTrackdir(TileIndex tile, Trackdir td)
{
return
IsTileType(tile, MP_RAILWAY) &&
HasSignalOnTrackdir(tile, ReverseTrackdir(td)) &&
!HasSignalOnTrackdir(tile, td) &&
IsOnewaySignal(tile, TrackdirToTrack(td));
}
/**
* Return the rail type of tile, or INVALID_RAILTYPE if this is no rail tile.
*/
RailType GetTileRailType(TileIndex tile);
/** The ground 'under' the rail */
enum RailGroundType {
RAIL_GROUND_BARREN = 0, ///< Nothing (dirt)
RAIL_GROUND_GRASS = 1, ///< Grassy
RAIL_GROUND_FENCE_NW = 2, ///< Grass with a fence at the NW edge
RAIL_GROUND_FENCE_SE = 3, ///< Grass with a fence at the SE edge
RAIL_GROUND_FENCE_SENW = 4, ///< Grass with a fence at the NW and SE edges
RAIL_GROUND_FENCE_NE = 5, ///< Grass with a fence at the NE edge
RAIL_GROUND_FENCE_SW = 6, ///< Grass with a fence at the SW edge
RAIL_GROUND_FENCE_NESW = 7, ///< Grass with a fence at the NE and SW edges
RAIL_GROUND_FENCE_VERT1 = 8, ///< Grass with a fence at the eastern side
RAIL_GROUND_FENCE_VERT2 = 9, ///< Grass with a fence at the western side
RAIL_GROUND_FENCE_HORIZ1 = 10, ///< Grass with a fence at the southern side
RAIL_GROUND_FENCE_HORIZ2 = 11, ///< Grass with a fence at the northern side
RAIL_GROUND_ICE_DESERT = 12, ///< Icy or sandy
RAIL_GROUND_WATER = 13, ///< Grass with a fence and shore or water on the free halftile
RAIL_GROUND_HALF_SNOW = 14, ///< Snow only on higher part of slope (steep or one corner raised)
};
static inline void SetRailGroundType(TileIndex t, RailGroundType rgt)
{
SB(_m[t].m4, 0, 4, rgt);
}
static inline RailGroundType GetRailGroundType(TileIndex t)
{
return (RailGroundType)GB(_m[t].m4, 0, 4);
}
static inline bool IsSnowRailGround(TileIndex t)
{
return GetRailGroundType(t) == RAIL_GROUND_ICE_DESERT;
}
static inline void MakeRailNormal(TileIndex t, Owner o, TrackBits b, RailType r)
{
SetTileType(t, MP_RAILWAY);
SetTileOwner(t, o);
_m[t].m2 = 0;
_m[t].m3 = r;
_m[t].m4 = 0;
_m[t].m5 = RAIL_TILE_NORMAL << 6 | b;
SB(_m[t].m6, 2, 4, 0);
_me[t].m7 = 0;
}
static inline void MakeRailDepot(TileIndex t, Owner o, DiagDirection d, RailType r)
{
SetTileType(t, MP_RAILWAY);
SetTileOwner(t, o);
_m[t].m2 = 0;
_m[t].m3 = r;
_m[t].m4 = 0;
_m[t].m5 = RAIL_TILE_DEPOT << 6 | d;
SB(_m[t].m6, 2, 4, 0);
_me[t].m7 = 0;
}
static inline void MakeRailWaypoint(TileIndex t, Owner o, Axis a, RailType r, uint index)
{
SetTileType(t, MP_RAILWAY);
SetTileOwner(t, o);
_m[t].m2 = index;
_m[t].m3 = r;
_m[t].m4 = 0;
_m[t].m5 = RAIL_TILE_WAYPOINT << 6 | a;
SB(_m[t].m6, 2, 4, 0);
_me[t].m7 = 0;
}
#endif /* RAIL_MAP_H */
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