OpenTTD
follow_track.hpp
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1 /* $Id$ */
2 
3 /*
4  * This file is part of OpenTTD.
5  * 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.
6  * 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.
7  * 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/>.
8  */
9 
12 #ifndef FOLLOW_TRACK_HPP
13 #define FOLLOW_TRACK_HPP
14 
15 #include "../pbs.h"
16 #include "../roadveh.h"
17 #include "../station_base.h"
18 #include "../train.h"
19 #include "../tunnelbridge.h"
20 #include "../tunnelbridge_map.h"
21 #include "../depot_map.h"
22 #include "pf_performance_timer.hpp"
23 
29 template <TransportType Ttr_type_, typename VehicleType, bool T90deg_turns_allowed_ = true, bool Tmask_reserved_tracks = false>
31 {
32  enum ErrorCode {
33  EC_NONE,
34  EC_OWNER,
35  EC_RAIL_TYPE,
36  EC_90DEG,
37  EC_NO_WAY,
38  EC_RESERVED,
39  };
40 
41  const VehicleType *m_veh;
48  bool m_is_tunnel;
49  bool m_is_bridge;
50  bool m_is_station;
52  ErrorCode m_err;
53  CPerformanceTimer *m_pPerf;
54  RailTypes m_railtypes;
55 
56  inline CFollowTrackT(const VehicleType *v = NULL, RailTypes railtype_override = INVALID_RAILTYPES, CPerformanceTimer *pPerf = NULL)
57  {
58  Init(v, railtype_override, pPerf);
59  }
60 
61  inline CFollowTrackT(Owner o, RailTypes railtype_override = INVALID_RAILTYPES, CPerformanceTimer *pPerf = NULL)
62  {
63  m_veh = NULL;
64  Init(o, railtype_override, pPerf);
65  }
66 
67  inline void Init(const VehicleType *v, RailTypes railtype_override, CPerformanceTimer *pPerf)
68  {
69  assert(!IsRailTT() || (v != NULL && v->type == VEH_TRAIN));
70  m_veh = v;
71  Init(v != NULL ? v->owner : INVALID_OWNER, IsRailTT() && railtype_override == INVALID_RAILTYPES ? Train::From(v)->compatible_railtypes : railtype_override, pPerf);
72  }
73 
74  inline void Init(Owner o, RailTypes railtype_override, CPerformanceTimer *pPerf)
75  {
76  assert(!IsRoadTT() || m_veh != NULL);
77  assert(!IsRailTT() || railtype_override != INVALID_RAILTYPES);
78  m_veh_owner = o;
79  m_pPerf = pPerf;
80  /* don't worry, all is inlined so compiler should remove unnecessary initializations */
81  m_old_tile = INVALID_TILE;
82  m_old_td = INVALID_TRACKDIR;
83  m_new_tile = INVALID_TILE;
84  m_new_td_bits = TRACKDIR_BIT_NONE;
85  m_exitdir = INVALID_DIAGDIR;
86  m_is_station = m_is_bridge = m_is_tunnel = false;
87  m_tiles_skipped = 0;
88  m_err = EC_NONE;
89  m_railtypes = railtype_override;
90  }
91 
92  inline static TransportType TT() { return Ttr_type_; }
93  inline static bool IsWaterTT() { return TT() == TRANSPORT_WATER; }
94  inline static bool IsRailTT() { return TT() == TRANSPORT_RAIL; }
95  inline bool IsTram() { return IsRoadTT() && HasBit(RoadVehicle::From(m_veh)->compatible_roadtypes, ROADTYPE_TRAM); }
96  inline static bool IsRoadTT() { return TT() == TRANSPORT_ROAD; }
97  inline static bool Allow90degTurns() { return T90deg_turns_allowed_; }
98  inline static bool DoTrackMasking() { return Tmask_reserved_tracks; }
99 
102  {
103  assert(IsTram()); // this function shouldn't be called in other cases
104 
105  if (IsNormalRoadTile(tile)) {
106  RoadBits rb = GetRoadBits(tile, ROADTYPE_TRAM);
107  switch (rb) {
108  case ROAD_NW: return DIAGDIR_NW;
109  case ROAD_SW: return DIAGDIR_SW;
110  case ROAD_SE: return DIAGDIR_SE;
111  case ROAD_NE: return DIAGDIR_NE;
112  default: break;
113  }
114  }
115  return INVALID_DIAGDIR;
116  }
117 
122  inline bool Follow(TileIndex old_tile, Trackdir old_td)
123  {
124  m_old_tile = old_tile;
125  m_old_td = old_td;
126  m_err = EC_NONE;
127  assert(
129  GetTileTrackStatus(m_old_tile, TT(), (IsRoadTT() && m_veh != NULL) ? RoadVehicle::From(m_veh)->compatible_roadtypes : 0)
130  ) & TrackdirToTrackdirBits(m_old_td)) != 0) ||
131  (IsTram() && GetSingleTramBit(m_old_tile) != INVALID_DIAGDIR) // Disable the assertion for single tram bits
132  );
133  m_exitdir = TrackdirToExitdir(m_old_td);
134  if (ForcedReverse()) return true;
135  if (!CanExitOldTile()) return false;
136  FollowTileExit();
137  if (!QueryNewTileTrackStatus()) return TryReverse();
138  m_new_td_bits &= DiagdirReachesTrackdirs(m_exitdir);
139  if (m_new_td_bits == TRACKDIR_BIT_NONE || !CanEnterNewTile()) {
140  /* In case we can't enter the next tile, but are
141  * a normal road vehicle, then we can actually
142  * try to reverse as this is the end of the road.
143  * Trams can only turn on the appropriate bits in
144  * which case reaching this would mean a dead end
145  * near a building and in that case there would
146  * a "false" QueryNewTileTrackStatus result and
147  * as such reversing is already tried. The fact
148  * that function failed can have to do with a
149  * missing road bit, or inability to connect the
150  * different bits due to slopes. */
151  if (IsRoadTT() && !IsTram() && TryReverse()) return true;
152 
153  /* CanEnterNewTile already set a reason.
154  * Do NOT overwrite it (important for example for EC_RAIL_TYPE).
155  * Only set a reason if CanEnterNewTile was not called */
156  if (m_new_td_bits == TRACKDIR_BIT_NONE) m_err = EC_NO_WAY;
157 
158  return false;
159  }
160  if (!Allow90degTurns()) {
161  m_new_td_bits &= (TrackdirBits)~(int)TrackdirCrossesTrackdirs(m_old_td);
162  if (m_new_td_bits == TRACKDIR_BIT_NONE) {
163  m_err = EC_90DEG;
164  return false;
165  }
166  }
167  return true;
168  }
169 
170  inline bool MaskReservedTracks()
171  {
172  if (!DoTrackMasking()) return true;
173 
174  if (m_is_station) {
175  /* Check skipped station tiles as well. */
176  TileIndexDiff diff = TileOffsByDiagDir(m_exitdir);
177  for (TileIndex tile = m_new_tile - diff * m_tiles_skipped; tile != m_new_tile; tile += diff) {
178  if (HasStationReservation(tile)) {
179  m_new_td_bits = TRACKDIR_BIT_NONE;
180  m_err = EC_RESERVED;
181  return false;
182  }
183  }
184  }
185 
186  TrackBits reserved = GetReservedTrackbits(m_new_tile);
187  /* Mask already reserved trackdirs. */
188  m_new_td_bits &= ~TrackBitsToTrackdirBits(reserved);
189  /* Mask out all trackdirs that conflict with the reservation. */
190  Track t;
191  FOR_EACH_SET_TRACK(t, TrackdirBitsToTrackBits(m_new_td_bits)) {
192  if (TracksOverlap(reserved | TrackToTrackBits(t))) m_new_td_bits &= ~TrackToTrackdirBits(t);
193  }
194  if (m_new_td_bits == TRACKDIR_BIT_NONE) {
195  m_err = EC_RESERVED;
196  return false;
197  }
198  return true;
199  }
200 
201 protected:
203  inline void FollowTileExit()
204  {
205  m_is_station = m_is_bridge = m_is_tunnel = false;
206  m_tiles_skipped = 0;
207 
208  /* extra handling for tunnels and bridges in our direction */
209  if (IsTileType(m_old_tile, MP_TUNNELBRIDGE)) {
210  DiagDirection enterdir = GetTunnelBridgeDirection(m_old_tile);
211  if (enterdir == m_exitdir) {
212  /* we are entering the tunnel / bridge */
213  if (IsTunnel(m_old_tile)) {
214  m_is_tunnel = true;
215  m_new_tile = GetOtherTunnelEnd(m_old_tile);
216  } else { // IsBridge(m_old_tile)
217  m_is_bridge = true;
218  m_new_tile = GetOtherBridgeEnd(m_old_tile);
219  }
220  m_tiles_skipped = GetTunnelBridgeLength(m_new_tile, m_old_tile);
221  return;
222  }
223  assert(ReverseDiagDir(enterdir) == m_exitdir);
224  }
225 
226  /* normal or station tile, do one step */
227  m_new_tile = TileAddByDiagDir(m_old_tile, m_exitdir);
228 
229  /* special handling for stations */
230  if (IsRailTT() && HasStationTileRail(m_new_tile)) {
231  m_is_station = true;
232  } else if (IsRoadTT() && IsRoadStopTile(m_new_tile)) {
233  m_is_station = true;
234  }
235  }
236 
239  {
240  CPerfStart perf(*m_pPerf);
241  if (IsRailTT() && IsPlainRailTile(m_new_tile)) {
242  m_new_td_bits = (TrackdirBits)(GetTrackBits(m_new_tile) * 0x101);
243  } else {
244  m_new_td_bits = TrackStatusToTrackdirBits(GetTileTrackStatus(m_new_tile, TT(), IsRoadTT() ? RoadVehicle::From(m_veh)->compatible_roadtypes : 0));
245 
246  if (IsTram() && m_new_td_bits == TRACKDIR_BIT_NONE) {
247  /* GetTileTrackStatus() returns 0 for single tram bits.
248  * As we cannot change it there (easily) without breaking something, change it here */
249  switch (GetSingleTramBit(m_new_tile)) {
250  case DIAGDIR_NE:
251  case DIAGDIR_SW:
252  m_new_td_bits = TRACKDIR_BIT_X_NE | TRACKDIR_BIT_X_SW;
253  break;
254 
255  case DIAGDIR_NW:
256  case DIAGDIR_SE:
257  m_new_td_bits = TRACKDIR_BIT_Y_NW | TRACKDIR_BIT_Y_SE;
258  break;
259 
260  default: break;
261  }
262  }
263  }
264  return (m_new_td_bits != TRACKDIR_BIT_NONE);
265  }
266 
268  inline bool CanExitOldTile()
269  {
270  /* road stop can be left at one direction only unless it's a drive-through stop */
271  if (IsRoadTT() && IsStandardRoadStopTile(m_old_tile)) {
272  DiagDirection exitdir = GetRoadStopDir(m_old_tile);
273  if (exitdir != m_exitdir) {
274  m_err = EC_NO_WAY;
275  return false;
276  }
277  }
278 
279  /* single tram bits can only be left in one direction */
280  if (IsTram()) {
281  DiagDirection single_tram = GetSingleTramBit(m_old_tile);
282  if (single_tram != INVALID_DIAGDIR && single_tram != m_exitdir) {
283  m_err = EC_NO_WAY;
284  return false;
285  }
286  }
287 
288  /* road depots can be also left in one direction only */
289  if (IsRoadTT() && IsDepotTypeTile(m_old_tile, TT())) {
290  DiagDirection exitdir = GetRoadDepotDirection(m_old_tile);
291  if (exitdir != m_exitdir) {
292  m_err = EC_NO_WAY;
293  return false;
294  }
295  }
296  return true;
297  }
298 
300  inline bool CanEnterNewTile()
301  {
302  if (IsRoadTT() && IsStandardRoadStopTile(m_new_tile)) {
303  /* road stop can be entered from one direction only unless it's a drive-through stop */
304  DiagDirection exitdir = GetRoadStopDir(m_new_tile);
305  if (ReverseDiagDir(exitdir) != m_exitdir) {
306  m_err = EC_NO_WAY;
307  return false;
308  }
309  }
310 
311  /* single tram bits can only be entered from one direction */
312  if (IsTram()) {
313  DiagDirection single_tram = GetSingleTramBit(m_new_tile);
314  if (single_tram != INVALID_DIAGDIR && single_tram != ReverseDiagDir(m_exitdir)) {
315  m_err = EC_NO_WAY;
316  return false;
317  }
318  }
319 
320  /* road and rail depots can also be entered from one direction only */
321  if (IsRoadTT() && IsDepotTypeTile(m_new_tile, TT())) {
322  DiagDirection exitdir = GetRoadDepotDirection(m_new_tile);
323  if (ReverseDiagDir(exitdir) != m_exitdir) {
324  m_err = EC_NO_WAY;
325  return false;
326  }
327  /* don't try to enter other company's depots */
328  if (GetTileOwner(m_new_tile) != m_veh_owner) {
329  m_err = EC_OWNER;
330  return false;
331  }
332  }
333  if (IsRailTT() && IsDepotTypeTile(m_new_tile, TT())) {
334  DiagDirection exitdir = GetRailDepotDirection(m_new_tile);
335  if (ReverseDiagDir(exitdir) != m_exitdir) {
336  m_err = EC_NO_WAY;
337  return false;
338  }
339  }
340 
341  /* rail transport is possible only on tiles with the same owner as vehicle */
342  if (IsRailTT() && GetTileOwner(m_new_tile) != m_veh_owner) {
343  /* different owner */
344  m_err = EC_NO_WAY;
345  return false;
346  }
347 
348  /* rail transport is possible only on compatible rail types */
349  if (IsRailTT()) {
350  RailType rail_type = GetTileRailType(m_new_tile);
351  if (!HasBit(m_railtypes, rail_type)) {
352  /* incompatible rail type */
353  m_err = EC_RAIL_TYPE;
354  return false;
355  }
356  }
357 
358  /* tunnel holes and bridge ramps can be entered only from proper direction */
359  if (IsTileType(m_new_tile, MP_TUNNELBRIDGE)) {
360  if (IsTunnel(m_new_tile)) {
361  if (!m_is_tunnel) {
362  DiagDirection tunnel_enterdir = GetTunnelBridgeDirection(m_new_tile);
363  if (tunnel_enterdir != m_exitdir) {
364  m_err = EC_NO_WAY;
365  return false;
366  }
367  }
368  } else { // IsBridge(m_new_tile)
369  if (!m_is_bridge) {
370  DiagDirection ramp_enderdir = GetTunnelBridgeDirection(m_new_tile);
371  if (ramp_enderdir != m_exitdir) {
372  m_err = EC_NO_WAY;
373  return false;
374  }
375  }
376  }
377  }
378 
379  /* special handling for rail stations - get to the end of platform */
380  if (IsRailTT() && m_is_station) {
381  /* entered railway station
382  * get platform length */
383  uint length = BaseStation::GetByTile(m_new_tile)->GetPlatformLength(m_new_tile, TrackdirToExitdir(m_old_td));
384  /* how big step we must do to get to the last platform tile; */
385  m_tiles_skipped = length - 1;
386  /* move to the platform end */
387  TileIndexDiff diff = TileOffsByDiagDir(m_exitdir);
388  diff *= m_tiles_skipped;
389  m_new_tile = TILE_ADD(m_new_tile, diff);
390  return true;
391  }
392 
393  return true;
394  }
395 
397  inline bool ForcedReverse()
398  {
399  /* rail and road depots cause reversing */
400  if (!IsWaterTT() && IsDepotTypeTile(m_old_tile, TT())) {
401  DiagDirection exitdir = IsRailTT() ? GetRailDepotDirection(m_old_tile) : GetRoadDepotDirection(m_old_tile);
402  if (exitdir != m_exitdir) {
403  /* reverse */
404  m_new_tile = m_old_tile;
405  m_new_td_bits = TrackdirToTrackdirBits(ReverseTrackdir(m_old_td));
406  m_exitdir = exitdir;
407  m_tiles_skipped = 0;
408  m_is_tunnel = m_is_bridge = m_is_station = false;
409  return true;
410  }
411  }
412 
413  /* Single tram bits and standard road stops cause reversing. */
414  if (IsRoadTT() && ((IsTram() && GetSingleTramBit(m_old_tile) == ReverseDiagDir(m_exitdir)) ||
415  (IsStandardRoadStopTile(m_old_tile) && GetRoadStopDir(m_old_tile) == ReverseDiagDir(m_exitdir)))) {
416  /* reverse */
417  m_new_tile = m_old_tile;
418  m_new_td_bits = TrackdirToTrackdirBits(ReverseTrackdir(m_old_td));
419  m_exitdir = ReverseDiagDir(m_exitdir);
420  m_tiles_skipped = 0;
421  m_is_tunnel = m_is_bridge = m_is_station = false;
422  return true;
423  }
424 
425  return false;
426  }
427 
429  inline bool TryReverse()
430  {
431  if (IsRoadTT() && !IsTram()) {
432  /* if we reached the end of road, we can reverse the RV and continue moving */
433  m_exitdir = ReverseDiagDir(m_exitdir);
434  /* new tile will be the same as old one */
435  m_new_tile = m_old_tile;
436  /* set new trackdir bits to all reachable trackdirs */
438  m_new_td_bits &= DiagdirReachesTrackdirs(m_exitdir);
439  if (m_new_td_bits != TRACKDIR_BIT_NONE) {
440  /* we have some trackdirs reachable after reversal */
441  return true;
442  }
443  }
444  m_err = EC_NO_WAY;
445  return false;
446  }
447 
448 public:
450  int GetSpeedLimit(int *pmin_speed = NULL) const
451  {
452  int min_speed = 0;
453  int max_speed = INT_MAX; // no limit
454 
455  /* Check for on-bridge speed limit */
456  if (!IsWaterTT() && IsBridgeTile(m_old_tile)) {
457  int spd = GetBridgeSpec(GetBridgeType(m_old_tile))->speed;
458  if (IsRoadTT()) spd *= 2;
459  if (max_speed > spd) max_speed = spd;
460  }
461  /* Check for speed limit imposed by railtype */
462  if (IsRailTT()) {
463  uint16 rail_speed = GetRailTypeInfo(GetRailType(m_old_tile))->max_speed;
464  if (rail_speed > 0) max_speed = min(max_speed, rail_speed);
465  }
466 
467  /* if min speed was requested, return it */
468  if (pmin_speed != NULL) *pmin_speed = min_speed;
469  return max_speed;
470  }
471 };
472 
476 
480 
483 
484 #endif /* FOLLOW_TRACK_HPP */
TileIndex GetOtherBridgeEnd(TileIndex tile)
Starting at one bridge end finds the other bridge end.
Definition: bridge_map.cpp:61
virtual uint GetPlatformLength(TileIndex tile) const =0
Obtain the length of a platform.
static const RailtypeInfo * GetRailTypeInfo(RailType railtype)
Returns a pointer to the Railtype information for a given railtype.
Definition: rail.h:298
DiagDirection GetSingleTramBit(TileIndex tile)
Tests if a tile is a road tile with a single tramtrack (tram can reverse)
bool Follow(TileIndex old_tile, Trackdir old_td)
main follower routine.
RailType
Enumeration for all possible railtypes.
Definition: rail_type.h:29
TrackdirBits m_new_td_bits
the new set of available trackdirs
bool m_is_tunnel
last turn passed tunnel
const VehicleType * m_veh
moving vehicle
Flag for an invalid DiagDirection.
int32 TileIndexDiff
An offset value between to tiles.
Definition: map_func.h:156
static bool IsBridgeTile(TileIndex t)
checks if there is a bridge on this tile
Definition: bridge_map.h:35
Track
These are used to specify a single track.
Definition: track_type.h:21
static TrackdirBits TrackToTrackdirBits(Track track)
Returns a TrackdirBit mask from a given Track.
Definition: track_func.h:304
Transport over water.
South-west part.
Definition: road_type.h:58
static TileIndex TileAddByDiagDir(TileIndex tile, DiagDirection dir)
Adds a DiagDir to a tile.
Definition: map_func.h:384
static RoadBits GetRoadBits(TileIndex t, RoadType rt)
Get the present road bits for a specific road type.
Definition: road_map.h:111
Northeast, upper right on your monitor.
uint16 speed
maximum travel speed (1 unit = 1/1.6 mph = 1 km-ish/h)
Definition: bridge.h:48
TileIndex m_old_tile
the origin (vehicle moved from) before move
static DiagDirection GetRoadDepotDirection(TileIndex t)
Get the direction of the exit of a road depot.
Definition: road_map.h:535
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:565
static bool IsStandardRoadStopTile(TileIndex t)
Is tile t a standard (non-drive through) road stop station?
Definition: station_map.h:224
bool m_is_station
last turn passed station
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:449
bool m_is_bridge
last turn passed bridge ramp
static Train * From(Vehicle *v)
Converts a Vehicle to SpecializedVehicle with type checking.
TrackBits
Bitfield corresponding to Track.
Definition: track_type.h:41
Track x-axis, direction north-east.
Definition: track_type.h:108
int GetSpeedLimit(int *pmin_speed=NULL) const
Helper for pathfinders - get min/max speed on the m_old_tile/m_old_td.
static TileIndexDiff TileOffsByDiagDir(DiagDirection dir)
Convert a DiagDirection to a TileIndexDiff.
Definition: map_func.h:343
static bool IsTileType(TileIndex tile, TileType type)
Checks if a tile is a given tiletype.
Definition: tile_map.h:152
static bool HasStationReservation(TileIndex t)
Get the reservation state of the rail station.
Definition: station_map.h:394
void FollowTileExit()
Follow the m_exitdir from m_old_tile and fill m_new_tile and m_tiles_skipped.
VehicleType
Available vehicle types.
Definition: vehicle_type.h:23
bool CanExitOldTile()
return true if we can leave m_old_tile in m_exitdir
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:20
static TrackdirBits TrackdirToTrackdirBits(Trackdir trackdir)
Maps a Trackdir to the corresponding TrackdirBits value.
Definition: track_func.h:121
static DiagDirection GetRoadStopDir(TileIndex t)
Gets the direction the road stop entrance points towards.
Definition: station_map.h:258
static Owner GetTileOwner(TileIndex tile)
Returns the owner of a tile.
Definition: tile_map.h:180
Invalid railtypes.
Definition: rail_type.h:59
static DiagDirection GetRailDepotDirection(TileIndex t)
Returns the direction the depot is facing to.
Definition: rail_map.h:172
static DiagDirection ReverseDiagDir(DiagDirection d)
Returns the reverse direction of the given DiagDirection.
static uint GetTunnelBridgeLength(TileIndex begin, TileIndex end)
Calculates the length of a tunnel or a bridge (without end tiles)
Definition: tunnelbridge.h:26
Southeast.
Southwest.
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:147
static const BridgeSpec * GetBridgeSpec(BridgeType i)
Get the specification of a bridge type.
Definition: bridge.h:67
Trams.
Definition: road_type.h:25
#define FOR_EACH_SET_TRACK(var, track_bits)
Iterate through each set Track in a TrackBits value.
Definition: track_func.h:29
RoadBits
Enumeration for the road parts on a tile.
Definition: road_type.h:55
Trackdir
Enumeration for tracks and directions.
Definition: track_type.h:74
Performance timer for pathfinders.
uint16 max_speed
Maximum speed for vehicles travelling on this rail type.
Definition: rail.h:222
North-east part.
Definition: road_type.h:60
Northwest.
DiagDirection
Enumeration for diagonal directions.
static T min(const T a, const T b)
Returns the minimum of two values.
Definition: math_func.hpp:42
RailTypes
The different railtypes we support, but then a bitmask of them.
Definition: rail_type.h:53
static DiagDirection GetTunnelBridgeDirection(TileIndex t)
Get the direction pointing to the other end.
static bool IsPlainRailTile(TileIndex t)
Checks whether the tile is a rail tile or rail tile with signals.
Definition: rail_map.h:61
Track follower helper template class (can serve pathfinders and vehicle controllers).
static Trackdir ReverseTrackdir(Trackdir trackdir)
Maps a trackdir to the reverse trackdir.
Definition: track_func.h:257
TrackStatus GetTileTrackStatus(TileIndex tile, TransportType mode, uint sub_mode, DiagDirection side)
Returns information about trackdirs and signal states.
Definition: landscape.cpp:591
North-west part.
Definition: road_type.h:57
South-east part.
Definition: road_type.h:59
static BridgeType GetBridgeType(TileIndex t)
Determines the type of bridge on a tile.
Definition: bridge_map.h:56
static TrackBits GetTrackBits(TileIndex tile)
Gets the track bits of the given tile.
Definition: rail_map.h:137
Transport by train.
static BaseStation * GetByTile(TileIndex tile)
Get the base station belonging to a specific tile.
static TrackBits TrackToTrackBits(Track track)
Maps a Track to the corresponding TrackBits value.
Definition: track_func.h:87
RailType GetTileRailType(TileIndex tile)
Return the rail type of tile, or INVALID_RAILTYPE if this is no rail tile.
Definition: rail.cpp:157
bool ForcedReverse()
return true if we must reverse (in depots and single tram bits)
static bool IsNormalRoadTile(TileIndex t)
Return whether a tile is a normal road tile.
Definition: road_map.h:57
Tunnel entry/exit and bridge heads.
Definition: tile_type.h:52
Track x-axis, direction south-west.
Definition: track_type.h:115
uint32 TileIndex
The index/ID of a Tile.
Definition: tile_type.h:80
Track y-axis, direction north-west.
Definition: track_type.h:116
TrackBits GetReservedTrackbits(TileIndex t)
Get the reserved trackbits for any tile, regardless of type.
Definition: pbs.cpp:26
TileIndex m_new_tile
the new tile (the vehicle has entered)
TransportType
Available types of transport.
Transport by road vehicle.
TrackdirBits
Enumeration of bitmasks for the TrackDirs.
Definition: track_type.h:106
static bool IsRoadStopTile(TileIndex t)
Is tile t a road stop station?
Definition: station_map.h:214
TileIndex GetOtherTunnelEnd(TileIndex tile)
Gets the other end of the tunnel.
Definition: tunnel_map.cpp:24
DiagDirection m_exitdir
exit direction (leaving the old tile)
bool TryReverse()
return true if we successfully reversed at end of road/track
Trackdir m_old_td
the trackdir (the vehicle was on) before move
Track y-axis, direction south-east.
Definition: track_type.h:109
static bool HasBit(const T x, const uint8 y)
Checks if a bit in a value is set.
static TrackdirBits TrackBitsToTrackdirBits(TrackBits bits)
Converts TrackBits to TrackdirBits while allowing both directions.
Definition: track_func.h:329
static const TileIndex INVALID_TILE
The very nice invalid tile marker.
Definition: tile_type.h:85
Owner m_veh_owner
owner of the vehicle
No track build.
Definition: track_type.h:107
static TrackBits TrackdirBitsToTrackBits(TrackdirBits bits)
Discards all directional information from a TrackdirBits value.
Definition: track_func.h:318
Owner
Enum for all companies/owners.
Definition: company_type.h:20
Flag for an invalid trackdir.
Definition: track_type.h:93
#define TILE_ADD(x, y)
Adds to tiles together.
Definition: map_func.h:246
int m_tiles_skipped
number of skipped tunnel or station tiles
static TrackdirBits TrackdirCrossesTrackdirs(Trackdir trackdir)
Maps a trackdir to all trackdirs that make 90 deg turns with it.
Definition: track_func.h:616
static bool IsTunnel(TileIndex t)
Is this a tunnel (entrance)?
Definition: tunnel_map.h:24
static TrackdirBits TrackStatusToTrackdirBits(TrackStatus ts)
Returns the present-trackdir-information of a TrackStatus.
Definition: track_func.h:362
static RailType GetRailType(TileIndex t)
Gets the rail type of the given tile.
Definition: rail_map.h:116
static bool TracksOverlap(TrackBits bits)
Checks if the given tracks overlap, ie form a crossing.
Definition: track_func.h:655
bool CanEnterNewTile()
return true if we can enter m_new_tile from m_exitdir
An invalid owner.
Definition: company_type.h:31
bool QueryNewTileTrackStatus()
stores track status (available trackdirs) for the new tile into m_new_td_bits
Train vehicle type.
Definition: vehicle_type.h:26