OpenTTD Source  1.11.2
follow_track.hpp
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1 /*
2  * This file is part of OpenTTD.
3  * OpenTTD is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, version 2.
4  * OpenTTD is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
5  * See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with OpenTTD. If not, see <http://www.gnu.org/licenses/>.
6  */
7 
10 #ifndef FOLLOW_TRACK_HPP
11 #define FOLLOW_TRACK_HPP
12 
13 #include "../pbs.h"
14 #include "../roadveh.h"
15 #include "../station_base.h"
16 #include "../train.h"
17 #include "../tunnelbridge.h"
18 #include "../tunnelbridge_map.h"
19 #include "../depot_map.h"
20 #include "pathfinder_func.h"
21 
27 template <TransportType Ttr_type_, typename VehicleType, bool T90deg_turns_allowed_ = true, bool Tmask_reserved_tracks = false>
29 {
30  enum ErrorCode {
31  EC_NONE,
32  EC_OWNER,
33  EC_RAIL_ROAD_TYPE,
34  EC_90DEG,
35  EC_NO_WAY,
36  EC_RESERVED,
37  };
38 
39  const VehicleType *m_veh;
46  bool m_is_tunnel;
47  bool m_is_bridge;
48  bool m_is_station;
50  ErrorCode m_err;
51  RailTypes m_railtypes;
52 
53  inline CFollowTrackT(const VehicleType *v = nullptr, RailTypes railtype_override = INVALID_RAILTYPES)
54  {
55  Init(v, railtype_override);
56  }
57 
58  inline CFollowTrackT(Owner o, RailTypes railtype_override = INVALID_RAILTYPES)
59  {
60  assert(IsRailTT());
61  m_veh = nullptr;
62  Init(o, railtype_override);
63  }
64 
65  inline void Init(const VehicleType *v, RailTypes railtype_override)
66  {
67  assert(!IsRailTT() || (v != nullptr && v->type == VEH_TRAIN));
68  m_veh = v;
69  Init(v != nullptr ? v->owner : INVALID_OWNER, IsRailTT() && railtype_override == INVALID_RAILTYPES ? Train::From(v)->compatible_railtypes : railtype_override);
70  }
71 
72  inline void Init(Owner o, RailTypes railtype_override)
73  {
74  assert(!IsRoadTT() || m_veh != nullptr);
75  assert(!IsRailTT() || railtype_override != INVALID_RAILTYPES);
76  m_veh_owner = o;
77  /* don't worry, all is inlined so compiler should remove unnecessary initializations */
84  m_tiles_skipped = 0;
85  m_err = EC_NONE;
86  m_railtypes = railtype_override;
87  }
88 
89  inline static TransportType TT() { return Ttr_type_; }
90  inline static bool IsWaterTT() { return TT() == TRANSPORT_WATER; }
91  inline static bool IsRailTT() { return TT() == TRANSPORT_RAIL; }
92  inline bool IsTram() { return IsRoadTT() && RoadTypeIsTram(RoadVehicle::From(m_veh)->roadtype); }
93  inline static bool IsRoadTT() { return TT() == TRANSPORT_ROAD; }
94  inline static bool Allow90degTurns() { return T90deg_turns_allowed_; }
95  inline static bool DoTrackMasking() { return Tmask_reserved_tracks; }
96 
99  {
100  assert(IsTram()); // this function shouldn't be called in other cases
101 
102  if (IsNormalRoadTile(tile)) {
103  RoadBits rb = GetRoadBits(tile, RTT_TRAM);
104  switch (rb) {
105  case ROAD_NW: return DIAGDIR_NW;
106  case ROAD_SW: return DIAGDIR_SW;
107  case ROAD_SE: return DIAGDIR_SE;
108  case ROAD_NE: return DIAGDIR_NE;
109  default: break;
110  }
111  }
112  return INVALID_DIAGDIR;
113  }
114 
119  inline bool Follow(TileIndex old_tile, Trackdir old_td)
120  {
121  m_old_tile = old_tile;
122  m_old_td = old_td;
123  m_err = EC_NONE;
124  assert(
126  GetTileTrackStatus(m_old_tile, TT(), (IsRoadTT() && m_veh != nullptr) ? (this->IsTram() ? RTT_TRAM : RTT_ROAD) : 0)
127  ) & TrackdirToTrackdirBits(m_old_td)) != 0) ||
128  (IsTram() && GetSingleTramBit(m_old_tile) != INVALID_DIAGDIR) // Disable the assertion for single tram bits
129  );
131  if (ForcedReverse()) return true;
132  if (!CanExitOldTile()) return false;
133  FollowTileExit();
134  if (!QueryNewTileTrackStatus()) return TryReverse();
137  /* In case we can't enter the next tile, but are
138  * a normal road vehicle, then we can actually
139  * try to reverse as this is the end of the road.
140  * Trams can only turn on the appropriate bits in
141  * which case reaching this would mean a dead end
142  * near a building and in that case there would
143  * a "false" QueryNewTileTrackStatus result and
144  * as such reversing is already tried. The fact
145  * that function failed can have to do with a
146  * missing road bit, or inability to connect the
147  * different bits due to slopes. */
148  if (IsRoadTT() && !IsTram() && TryReverse()) return true;
149 
150  /* CanEnterNewTile already set a reason.
151  * Do NOT overwrite it (important for example for EC_RAIL_ROAD_TYPE).
152  * Only set a reason if CanEnterNewTile was not called */
153  if (m_new_td_bits == TRACKDIR_BIT_NONE) m_err = EC_NO_WAY;
154 
155  return false;
156  }
157  if ((!IsRailTT() && !Allow90degTurns()) || (IsRailTT() && Rail90DegTurnDisallowed(GetTileRailType(m_old_tile), GetTileRailType(m_new_tile), !Allow90degTurns()))) {
160  m_err = EC_90DEG;
161  return false;
162  }
163  }
164  return true;
165  }
166 
167  inline bool MaskReservedTracks()
168  {
169  if (!DoTrackMasking()) return true;
170 
171  if (m_is_station) {
172  /* Check skipped station tiles as well. */
174  for (TileIndex tile = m_new_tile - diff * m_tiles_skipped; tile != m_new_tile; tile += diff) {
175  if (HasStationReservation(tile)) {
177  m_err = EC_RESERVED;
178  return false;
179  }
180  }
181  }
182 
184  /* Mask already reserved trackdirs. */
186  /* Mask out all trackdirs that conflict with the reservation. */
187  Track t;
190  }
192  m_err = EC_RESERVED;
193  return false;
194  }
195  return true;
196  }
197 
198 protected:
200  inline void FollowTileExit()
201  {
203  m_tiles_skipped = 0;
204 
205  /* extra handling for tunnels and bridges in our direction */
208  if (enterdir == m_exitdir) {
209  /* we are entering the tunnel / bridge */
210  if (IsTunnel(m_old_tile)) {
211  m_is_tunnel = true;
213  } else { // IsBridge(m_old_tile)
214  m_is_bridge = true;
216  }
218  return;
219  }
220  assert(ReverseDiagDir(enterdir) == m_exitdir);
221  }
222 
223  /* normal or station tile, do one step */
225 
226  /* special handling for stations */
227  if (IsRailTT() && HasStationTileRail(m_new_tile)) {
228  m_is_station = true;
229  } else if (IsRoadTT() && IsRoadStopTile(m_new_tile)) {
230  m_is_station = true;
231  }
232  }
233 
236  {
237  if (IsRailTT() && IsPlainRailTile(m_new_tile)) {
239  } else if (IsRoadTT()) {
240  m_new_td_bits = GetTrackdirBitsForRoad(m_new_tile, this->IsTram() ? RTT_TRAM : RTT_ROAD);
241  } else {
243  }
244  return (m_new_td_bits != TRACKDIR_BIT_NONE);
245  }
246 
248  inline bool CanExitOldTile()
249  {
250  /* road stop can be left at one direction only unless it's a drive-through stop */
251  if (IsRoadTT() && IsStandardRoadStopTile(m_old_tile)) {
253  if (exitdir != m_exitdir) {
254  m_err = EC_NO_WAY;
255  return false;
256  }
257  }
258 
259  /* single tram bits can only be left in one direction */
260  if (IsTram()) {
262  if (single_tram != INVALID_DIAGDIR && single_tram != m_exitdir) {
263  m_err = EC_NO_WAY;
264  return false;
265  }
266  }
267 
268  /* road depots can be also left in one direction only */
269  if (IsRoadTT() && IsDepotTypeTile(m_old_tile, TT())) {
271  if (exitdir != m_exitdir) {
272  m_err = EC_NO_WAY;
273  return false;
274  }
275  }
276  return true;
277  }
278 
280  inline bool CanEnterNewTile()
281  {
282  if (IsRoadTT() && IsStandardRoadStopTile(m_new_tile)) {
283  /* road stop can be entered from one direction only unless it's a drive-through stop */
285  if (ReverseDiagDir(exitdir) != m_exitdir) {
286  m_err = EC_NO_WAY;
287  return false;
288  }
289  }
290 
291  /* single tram bits can only be entered from one direction */
292  if (IsTram()) {
294  if (single_tram != INVALID_DIAGDIR && single_tram != ReverseDiagDir(m_exitdir)) {
295  m_err = EC_NO_WAY;
296  return false;
297  }
298  }
299 
300  /* road and rail depots can also be entered from one direction only */
301  if (IsRoadTT() && IsDepotTypeTile(m_new_tile, TT())) {
303  if (ReverseDiagDir(exitdir) != m_exitdir) {
304  m_err = EC_NO_WAY;
305  return false;
306  }
307  /* don't try to enter other company's depots */
309  m_err = EC_OWNER;
310  return false;
311  }
312  }
313  if (IsRailTT() && IsDepotTypeTile(m_new_tile, TT())) {
315  if (ReverseDiagDir(exitdir) != m_exitdir) {
316  m_err = EC_NO_WAY;
317  return false;
318  }
319  }
320 
321  /* rail transport is possible only on tiles with the same owner as vehicle */
322  if (IsRailTT() && GetTileOwner(m_new_tile) != m_veh_owner) {
323  /* different owner */
324  m_err = EC_NO_WAY;
325  return false;
326  }
327 
328  /* rail transport is possible only on compatible rail types */
329  if (IsRailTT()) {
330  RailType rail_type = GetTileRailType(m_new_tile);
331  if (!HasBit(m_railtypes, rail_type)) {
332  /* incompatible rail type */
333  m_err = EC_RAIL_ROAD_TYPE;
334  return false;
335  }
336  }
337 
338  /* road transport is possible only on compatible road types */
339  if (IsRoadTT()) {
340  const RoadVehicle *v = RoadVehicle::From(m_veh);
341  RoadType roadtype = GetRoadType(m_new_tile, GetRoadTramType(v->roadtype));
342  if (!HasBit(v->compatible_roadtypes, roadtype)) {
343  /* incompatible road type */
344  m_err = EC_RAIL_ROAD_TYPE;
345  return false;
346  }
347  }
348 
349  /* tunnel holes and bridge ramps can be entered only from proper direction */
351  if (IsTunnel(m_new_tile)) {
352  if (!m_is_tunnel) {
354  if (tunnel_enterdir != m_exitdir) {
355  m_err = EC_NO_WAY;
356  return false;
357  }
358  }
359  } else { // IsBridge(m_new_tile)
360  if (!m_is_bridge) {
362  if (ramp_enderdir != m_exitdir) {
363  m_err = EC_NO_WAY;
364  return false;
365  }
366  }
367  }
368  }
369 
370  /* special handling for rail stations - get to the end of platform */
371  if (IsRailTT() && m_is_station) {
372  /* entered railway station
373  * get platform length */
375  /* how big step we must do to get to the last platform tile; */
376  m_tiles_skipped = length - 1;
377  /* move to the platform end */
379  diff *= m_tiles_skipped;
380  m_new_tile = TILE_ADD(m_new_tile, diff);
381  return true;
382  }
383 
384  return true;
385  }
386 
388  inline bool ForcedReverse()
389  {
390  /* rail and road depots cause reversing */
391  if (!IsWaterTT() && IsDepotTypeTile(m_old_tile, TT())) {
393  if (exitdir != m_exitdir) {
394  /* reverse */
397  m_exitdir = exitdir;
398  m_tiles_skipped = 0;
400  return true;
401  }
402  }
403 
404  /* Single tram bits and standard road stops cause reversing. */
405  if (IsRoadTT() && ((IsTram() && GetSingleTramBit(m_old_tile) == ReverseDiagDir(m_exitdir)) ||
407  /* reverse */
411  m_tiles_skipped = 0;
413  return true;
414  }
415 
416  return false;
417  }
418 
420  inline bool TryReverse()
421  {
422  if (IsRoadTT() && !IsTram()) {
423  /* if we reached the end of road, we can reverse the RV and continue moving */
425  /* new tile will be the same as old one */
427  /* set new trackdir bits to all reachable trackdirs */
431  /* we have some trackdirs reachable after reversal */
432  return true;
433  }
434  }
435  m_err = EC_NO_WAY;
436  return false;
437  }
438 
439 public:
441  int GetSpeedLimit(int *pmin_speed = nullptr) const
442  {
443  int min_speed = 0;
444  int max_speed = INT_MAX; // no limit
445 
446  /* Check for on-bridge speed limit */
447  if (!IsWaterTT() && IsBridgeTile(m_old_tile)) {
449  if (IsRoadTT()) spd *= 2;
450  max_speed = std::min(max_speed, spd);
451  }
452  /* Check for speed limit imposed by railtype */
453  if (IsRailTT()) {
454  uint16 rail_speed = GetRailTypeInfo(GetRailType(m_old_tile))->max_speed;
455  if (rail_speed > 0) max_speed = std::min<int>(max_speed, rail_speed);
456  }
457  if (IsRoadTT()) {
458  /* max_speed is already in roadvehicle units, no need to further modify (divide by 2) */
459  uint16 road_speed = GetRoadTypeInfo(GetRoadType(m_old_tile, GetRoadTramType(RoadVehicle::From(m_veh)->roadtype)))->max_speed;
460  if (road_speed > 0) max_speed = std::min<int>(max_speed, road_speed);
461  }
462 
463  /* if min speed was requested, return it */
464  if (pmin_speed != nullptr) *pmin_speed = min_speed;
465  return max_speed;
466  }
467 };
468 
472 
474 
477 
478 #endif /* FOLLOW_TRACK_HPP */
RoadVehicle
Buses, trucks and trams belong to this class.
Definition: roadveh.h:107
CFollowTrackT::m_is_station
bool m_is_station
last turn passed station
Definition: follow_track.hpp:48
DIAGDIR_SE
@ DIAGDIR_SE
Southeast.
Definition: direction_type.h:80
GetRoadDepotDirection
static DiagDirection GetRoadDepotDirection(TileIndex t)
Get the direction of the exit of a road depot.
Definition: road_map.h:565
TileIndex
uint32 TileIndex
The index/ID of a Tile.
Definition: tile_type.h:83
TILE_ADD
#define TILE_ADD(x, y)
Adds to tiles together.
Definition: map_func.h:244
RailtypeInfo::max_speed
uint16 max_speed
Maximum speed for vehicles travelling on this rail type.
Definition: rail.h:228
GetOtherBridgeEnd
TileIndex GetOtherBridgeEnd(TileIndex tile)
Starting at one bridge end finds the other bridge end.
Definition: bridge_map.cpp:59
TileOffsByDiagDir
static TileIndexDiff TileOffsByDiagDir(DiagDirection dir)
Convert a DiagDirection to a TileIndexDiff.
Definition: map_func.h:341
GetBridgeType
static BridgeType GetBridgeType(TileIndex t)
Determines the type of bridge on a tile.
Definition: bridge_map.h:56
TrackdirBits
TrackdirBits
Enumeration of bitmasks for the TrackDirs.
Definition: track_type.h:101
CFollowTrackT::m_old_tile
TileIndex m_old_tile
the origin (vehicle moved from) before move
Definition: follow_track.hpp:41
TRANSPORT_RAIL
@ TRANSPORT_RAIL
Transport by train.
Definition: transport_type.h:27
GetReservedTrackbits
TrackBits GetReservedTrackbits(TileIndex t)
Get the reserved trackbits for any tile, regardless of type.
Definition: pbs.cpp:24
BaseStation::GetByTile
static BaseStation * GetByTile(TileIndex tile)
Get the base station belonging to a specific tile.
Definition: base_station_base.h:155
ROAD_SW
@ ROAD_SW
South-west part.
Definition: road_type.h:53
CFollowTrackT::CanExitOldTile
bool CanExitOldTile()
return true if we can leave m_old_tile in m_exitdir
Definition: follow_track.hpp:248
HasBit
static bool HasBit(const T x, const uint8 y)
Checks if a bit in a value is set.
Definition: bitmath_func.hpp:103
IsDepotTypeTile
static bool IsDepotTypeTile(TileIndex tile, TransportType type)
Check if a tile is a depot and it is a depot of the given type.
Definition: depot_map.h:18
TracksOverlap
static bool TracksOverlap(TrackBits bits)
Checks if the given tracks overlap, ie form a crossing.
Definition: track_func.h:653
IsStandardRoadStopTile
static bool IsStandardRoadStopTile(TileIndex t)
Is tile t a standard (non-drive through) road stop station?
Definition: station_map.h:223
GetTrackBits
static TrackBits GetTrackBits(TileIndex tile)
Gets the track bits of the given tile.
Definition: rail_map.h:136
CFollowTrackT::QueryNewTileTrackStatus
bool QueryNewTileTrackStatus()
stores track status (available trackdirs) for the new tile into m_new_td_bits
Definition: follow_track.hpp:235
Rail90DegTurnDisallowed
static bool Rail90DegTurnDisallowed(RailType rt1, RailType rt2, bool def=_settings_game.pf.forbid_90_deg)
Test if 90 degree turns are disallowed between two railtypes.
Definition: rail.h:354
DIAGDIR_NW
@ DIAGDIR_NW
Northwest.
Definition: direction_type.h:82
RoadVehicle::roadtype
RoadType roadtype
Roadtype of this vehicle.
Definition: roadveh.h:117
TransportType
TransportType
Available types of transport.
Definition: transport_type.h:19
Owner
Owner
Enum for all companies/owners.
Definition: company_type.h:18
BridgeSpec::speed
uint16 speed
maximum travel speed (1 unit = 1/1.6 mph = 1 km-ish/h)
Definition: bridge.h:46
INVALID_RAILTYPES
@ INVALID_RAILTYPES
Invalid railtypes.
Definition: rail_type.h:52
GetRailDepotDirection
static DiagDirection GetRailDepotDirection(TileIndex t)
Returns the direction the depot is facing to.
Definition: rail_map.h:171
CFollowTrackT::m_is_bridge
bool m_is_bridge
last turn passed bridge ramp
Definition: follow_track.hpp:47
TrackToTrackBits
static TrackBits TrackToTrackBits(Track track)
Maps a Track to the corresponding TrackBits value.
Definition: track_func.h:85
GetTileTrackStatus
TrackStatus GetTileTrackStatus(TileIndex tile, TransportType mode, uint sub_mode, DiagDirection side)
Returns information about trackdirs and signal states.
Definition: landscape.cpp:590
TRANSPORT_ROAD
@ TRANSPORT_ROAD
Transport by road vehicle.
Definition: transport_type.h:28
RoadBits
RoadBits
Enumeration for the road parts on a tile.
Definition: road_type.h:50
GetRailTypeInfo
static const RailtypeInfo * GetRailTypeInfo(RailType railtype)
Returns a pointer to the Railtype information for a given railtype.
Definition: rail.h:304
GetBridgeSpec
static const BridgeSpec * GetBridgeSpec(BridgeType i)
Get the specification of a bridge type.
Definition: bridge.h:65
GetRoadBits
static RoadBits GetRoadBits(TileIndex t, RoadTramType rtt)
Get the present road bits for a specific road type.
Definition: road_map.h:127
DIAGDIR_SW
@ DIAGDIR_SW
Southwest.
Definition: direction_type.h:81
FOR_EACH_SET_TRACK
#define FOR_EACH_SET_TRACK(var, track_bits)
Iterate through each set Track in a TrackBits value.
Definition: track_func.h:27
RailType
RailType
Enumeration for all possible railtypes.
Definition: rail_type.h:27
IsBridgeTile
static bool IsBridgeTile(TileIndex t)
checks if there is a bridge on this tile
Definition: bridge_map.h:35
TrackBitsToTrackdirBits
static TrackdirBits TrackBitsToTrackdirBits(TrackBits bits)
Converts TrackBits to TrackdirBits while allowing both directions.
Definition: track_func.h:327
TileIndexDiff
int32 TileIndexDiff
An offset value between to tiles.
Definition: map_func.h:154
TrackdirToExitdir
static DiagDirection TrackdirToExitdir(Trackdir trackdir)
Maps a trackdir to the (4-way) direction the tile is exited when following that trackdir.
Definition: track_func.h:447
INVALID_OWNER
@ INVALID_OWNER
An invalid owner.
Definition: company_type.h:29
TrackdirCrossesTrackdirs
static TrackdirBits TrackdirCrossesTrackdirs(Trackdir trackdir)
Maps a trackdir to all trackdirs that make 90 deg turns with it.
Definition: track_func.h:614
ROAD_NE
@ ROAD_NE
North-east part.
Definition: road_type.h:55
HasStationTileRail
static bool HasStationTileRail(TileIndex t)
Has this station tile a rail? In other words, is this station tile a rail station or rail waypoint?
Definition: station_map.h:146
ROAD_SE
@ ROAD_SE
South-east part.
Definition: road_type.h:54
TileAddByDiagDir
static TileIndex TileAddByDiagDir(TileIndex tile, DiagDirection dir)
Adds a DiagDir to a tile.
Definition: map_func.h:382
ReverseDiagDir
static DiagDirection ReverseDiagDir(DiagDirection d)
Returns the reverse direction of the given DiagDirection.
Definition: direction_func.h:118
HasStationReservation
static bool HasStationReservation(TileIndex t)
Get the reservation state of the rail station.
Definition: station_map.h:393
INVALID_DIAGDIR
@ INVALID_DIAGDIR
Flag for an invalid DiagDirection.
Definition: direction_type.h:84
MP_TUNNELBRIDGE
@ MP_TUNNELBRIDGE
Tunnel entry/exit and bridge heads.
Definition: tile_type.h:55
RoadVehicle::compatible_roadtypes
RoadTypes compatible_roadtypes
Roadtypes this consist is powered on.
Definition: roadveh.h:118
INVALID_TRACKDIR
@ INVALID_TRACKDIR
Flag for an invalid trackdir.
Definition: track_type.h:89
GetRoadStopDir
static DiagDirection GetRoadStopDir(TileIndex t)
Gets the direction the road stop entrance points towards.
Definition: station_map.h:257
DiagDirection
DiagDirection
Enumeration for diagonal directions.
Definition: direction_type.h:77
RoadType
RoadType
The different roadtypes we support.
Definition: road_type.h:22
VehicleType
VehicleType
Available vehicle types.
Definition: vehicle_type.h:21
CFollowTrackT::FollowTileExit
void FollowTileExit()
Follow the m_exitdir from m_old_tile and fill m_new_tile and m_tiles_skipped.
Definition: follow_track.hpp:200
IsTileType
static bool IsTileType(TileIndex tile, TileType type)
Checks if a tile is a given tiletype.
Definition: tile_map.h:150
ROAD_NW
@ ROAD_NW
North-west part.
Definition: road_type.h:52
GetTunnelBridgeDirection
static DiagDirection GetTunnelBridgeDirection(TileIndex t)
Get the direction pointing to the other end.
Definition: tunnelbridge_map.h:26
GetTileOwner
static Owner GetTileOwner(TileIndex tile)
Returns the owner of a tile.
Definition: tile_map.h:178
CFollowTrackT::m_old_td
Trackdir m_old_td
the trackdir (the vehicle was on) before move
Definition: follow_track.hpp:42
DiagdirReachesTrackdirs
static TrackdirBits DiagdirReachesTrackdirs(DiagDirection diagdir)
Returns all trackdirs that can be reached when entering a tile from a given (diagonal) direction.
Definition: track_func.h:563
GetTrackdirBitsForRoad
static TrackdirBits GetTrackdirBitsForRoad(TileIndex tile, RoadTramType rtt)
Wrapper around GetTileTrackStatus() and TrackStatusToTrackdirBits(), as for single tram bits GetTileT...
Definition: pathfinder_func.h:60
TRACKDIR_BIT_NONE
@ TRACKDIR_BIT_NONE
No track build.
Definition: track_type.h:102
IsRoadStopTile
static bool IsRoadStopTile(TileIndex t)
Is tile t a road stop station?
Definition: station_map.h:213
SpecializedVehicle< Train, Type >::From
static Train * From(Vehicle *v)
Converts a Vehicle to SpecializedVehicle with type checking.
Definition: vehicle_base.h:1162
IsTunnel
static bool IsTunnel(TileIndex t)
Is this a tunnel (entrance)?
Definition: tunnel_map.h:23
TrackToTrackdirBits
static TrackdirBits TrackToTrackdirBits(Track track)
Returns a TrackdirBit mask from a given Track.
Definition: track_func.h:302
TRANSPORT_WATER
@ TRANSPORT_WATER
Transport over water.
Definition: transport_type.h:29
GetRailType
static RailType GetRailType(TileIndex t)
Gets the rail type of the given tile.
Definition: rail_map.h:115
GetRoadTypeInfo
static const RoadTypeInfo * GetRoadTypeInfo(RoadType roadtype)
Returns a pointer to the Roadtype information for a given roadtype.
Definition: road.h:224
TrackStatusToTrackdirBits
static TrackdirBits TrackStatusToTrackdirBits(TrackStatus ts)
Returns the present-trackdir-information of a TrackStatus.
Definition: track_func.h:360
CFollowTrackT::m_veh_owner
Owner m_veh_owner
owner of the vehicle
Definition: follow_track.hpp:40
CFollowTrackT::m_new_tile
TileIndex m_new_tile
the new tile (the vehicle has entered)
Definition: follow_track.hpp:43
GetOtherTunnelEnd
TileIndex GetOtherTunnelEnd(TileIndex tile)
Gets the other end of the tunnel.
Definition: tunnel_map.cpp:22
TrackBits
TrackBits
Bitfield corresponding to Track.
Definition: track_type.h:38
TrackdirToTrackdirBits
static TrackdirBits TrackdirToTrackdirBits(Trackdir trackdir)
Maps a Trackdir to the corresponding TrackdirBits value.
Definition: track_func.h:119
GetTunnelBridgeLength
static uint GetTunnelBridgeLength(TileIndex begin, TileIndex end)
Calculates the length of a tunnel or a bridge (without end tiles)
Definition: tunnelbridge.h:25
CFollowTrackT::Follow
bool Follow(TileIndex old_tile, Trackdir old_td)
main follower routine.
Definition: follow_track.hpp:119
RoadTypeInfo::max_speed
uint16 max_speed
Maximum speed for vehicles travelling on this road type.
Definition: road.h:139
CFollowTrackT::m_exitdir
DiagDirection m_exitdir
exit direction (leaving the old tile)
Definition: follow_track.hpp:45
CFollowTrackT::CanEnterNewTile
bool CanEnterNewTile()
return true if we can enter m_new_tile from m_exitdir
Definition: follow_track.hpp:280
IsPlainRailTile
static bool IsPlainRailTile(TileIndex t)
Checks whether the tile is a rail tile or rail tile with signals.
Definition: rail_map.h:60
CFollowTrackT::m_new_td_bits
TrackdirBits m_new_td_bits
the new set of available trackdirs
Definition: follow_track.hpp:44
INVALID_TILE
static const TileIndex INVALID_TILE
The very nice invalid tile marker.
Definition: tile_type.h:88
IsNormalRoadTile
static bool IsNormalRoadTile(TileIndex t)
Return whether a tile is a normal road tile.
Definition: road_map.h:73
GetTileRailType
RailType GetTileRailType(TileIndex tile)
Return the rail type of tile, or INVALID_RAILTYPE if this is no rail tile.
Definition: rail.cpp:155
pathfinder_func.h
ReverseTrackdir
static Trackdir ReverseTrackdir(Trackdir trackdir)
Maps a trackdir to the reverse trackdir.
Definition: track_func.h:255
Trackdir
Trackdir
Enumeration for tracks and directions.
Definition: track_type.h:70
VEH_TRAIN
@ VEH_TRAIN
Train vehicle type.
Definition: vehicle_type.h:24
BaseStation::GetPlatformLength
virtual uint GetPlatformLength(TileIndex tile) const =0
Obtain the length of a platform.
Track
Track
These are used to specify a single track.
Definition: track_type.h:19
TrackdirBitsToTrackBits
static TrackBits TrackdirBitsToTrackBits(TrackdirBits bits)
Discards all directional information from a TrackdirBits value.
Definition: track_func.h:316
DIAGDIR_NE
@ DIAGDIR_NE
Northeast, upper right on your monitor.
Definition: direction_type.h:79
RailTypes
RailTypes
The different railtypes we support, but then a bitmask of them.
Definition: rail_type.h:46
CFollowTrackT::GetSpeedLimit
int GetSpeedLimit(int *pmin_speed=nullptr) const
Helper for pathfinders - get min/max speed on the m_old_tile/m_old_td.
Definition: follow_track.hpp:441
CFollowTrackT::m_veh
const VehicleType * m_veh
moving vehicle
Definition: follow_track.hpp:39
CFollowTrackT::ForcedReverse
bool ForcedReverse()
return true if we must reverse (in depots and single tram bits)
Definition: follow_track.hpp:388
CFollowTrackT::GetSingleTramBit
DiagDirection GetSingleTramBit(TileIndex tile)
Tests if a tile is a road tile with a single tramtrack (tram can reverse)
Definition: follow_track.hpp:98
CFollowTrackT
Track follower helper template class (can serve pathfinders and vehicle controllers).
Definition: follow_track.hpp:28
CFollowTrackT::m_tiles_skipped
int m_tiles_skipped
number of skipped tunnel or station tiles
Definition: follow_track.hpp:49
CFollowTrackT::m_is_tunnel
bool m_is_tunnel
last turn passed tunnel
Definition: follow_track.hpp:46
CFollowTrackT::TryReverse
bool TryReverse()
return true if we successfully reversed at end of road/track
Definition: follow_track.hpp:420