?  search:
summary | log | graphiclog1 | graphiclog2 | commit | commitdiff | tree | refs | edit | fork
blame | history | raw | HEAD
Merge QueryNewTileTrackStatus and CanEnterNewTile
[openttd/fttd.git] / src / pathfinder / follow_track.hpp
blob07e2b30f8ef74ea56c2cd3013f5c3b70dcc63004
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
10 /** @file follow_track.hpp Template function for track followers */
11
12 #ifndef FOLLOW_TRACK_HPP
13 #define FOLLOW_TRACK_HPP
14
15 #include "../map/road.h"
16 #include "../pbs.h"
17 #include "../roadveh.h"
18 #include "../station_base.h"
19 #include "../train.h"
20 #include "../tunnelbridge.h"
21 #include "../depot_func.h"
22 #include "../bridge.h"
23 #include "pathfinder_type.h"
24 #include "pf_performance_timer.hpp"
25
26 /**
27 * Track follower helper template class (can serve pathfinders and vehicle
28 * controllers). See 6 different typedefs below for 3 different transport
29 * types w/ or w/o 90-deg turns allowed
30 */
31 template <TransportType Ttr_type_, typename VehicleType, bool Twormhole = false>
32 struct CFollowTrack
33 {
34 enum TileFlag {
35 TF_NONE,
36 TF_STATION,
37 TF_TUNNEL,
38 TF_BRIDGE,
39 };
40
41 enum ErrorCode {
42 EC_NONE,
43 EC_OWNER,
44 EC_RAIL_TYPE,
45 EC_90DEG,
46 EC_NO_WAY,
47 EC_RESERVED,
48 };
49
50 enum TileResult {
51 TR_NORMAL,
52 TR_NO_WAY,
53 TR_REVERSE,
54 };
55
56 const VehicleType *m_veh; ///< moving vehicle
57 Owner m_veh_owner; ///< owner of the vehicle
58 PFPos m_old; ///< the origin (vehicle moved from) before move
59 PFNewPos m_new; ///< the new tile (the vehicle has entered)
60 DiagDirection m_exitdir; ///< exit direction (leaving the old tile)
61 TileFlag m_flag; ///< last turn passed station, tunnel or bridge
62 int m_tiles_skipped; ///< number of skipped tunnel or station tiles
63 ErrorCode m_err;
64 CPerformanceTimer *m_pPerf;
65 RailTypes m_railtypes;
66 bool m_allow_90deg;
67 bool m_mask_reserved;
68
69 inline CFollowTrack(const VehicleType *v = NULL, bool allow_90deg = true, bool mask_reserved = false, RailTypes railtype_override = INVALID_RAILTYPES, CPerformanceTimer *pPerf = NULL)
70 {
71 assert(!IsRailTT() || (v != NULL && v->type == VEH_TRAIN));
72 m_veh = v;
73 Init(v != NULL ? v->owner : INVALID_OWNER, allow_90deg, mask_reserved, IsRailTT() && railtype_override == INVALID_RAILTYPES ? Train::From(v)->compatible_railtypes : railtype_override, pPerf);
74 }
75
76 inline CFollowTrack(Owner o, bool allow_90deg = true, bool mask_reserved = false, RailTypes railtype_override = INVALID_RAILTYPES, CPerformanceTimer *pPerf = NULL)
77 {
78 m_veh = NULL;
79 Init(o, allow_90deg, mask_reserved, railtype_override, pPerf);
80 }
81
82 inline void Init(Owner o, bool allow_90deg, bool mask_reserved, RailTypes railtype_override, CPerformanceTimer *pPerf)
83 {
84 assert((!IsRoadTT() || m_veh != NULL) && (!IsRailTT() || railtype_override != INVALID_RAILTYPES));
85 m_veh_owner = o;
86 m_pPerf = pPerf;
87 m_railtypes = railtype_override;
88 m_allow_90deg = allow_90deg;
89 m_mask_reserved = mask_reserved;
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 StepWormhole() {return Twormhole;}
98
99 protected:
100 inline TrackdirBits GetTrackStatusTrackdirBits(TileIndex tile) const
101 {
102 if (IsRailTT()) {
103 return TrackStatusToTrackdirBits(GetTileRailwayStatus(tile));
104 } else if (IsRoadTT()) {
105 return TrackStatusToTrackdirBits(GetTileRoadStatus(tile, m_veh != NULL ? RoadVehicle::From(m_veh)->compatible_roadtypes : 0));
106 } else {
107 return TrackStatusToTrackdirBits(GetTileWaterwayStatus(tile));
108 }
109 }
110
111 public:
112 /** Tests if a tile is a road tile with a single tramtrack (tram can reverse) */
113 inline DiagDirection GetSingleTramBit(TileIndex tile)
114 {
115 assert(IsTram()); // this function shouldn't be called in other cases
116
117 if (IsRoadTile(tile)) {
118 RoadBits rb = GetRoadBits(tile, ROADTYPE_TRAM);
119 switch (rb) {
120 case ROAD_NW: return DIAGDIR_NW;
121 case ROAD_SW: return DIAGDIR_SW;
122 case ROAD_SE: return DIAGDIR_SE;
123 case ROAD_NE: return DIAGDIR_NE;
124 default: break;
125 }
126 }
127 return INVALID_DIAGDIR;
128 }
129
130 /**
131 * main follower routine. Fills all members and return true on success.
132 * Otherwise returns false if track can't be followed.
133 */
134 inline bool Follow(const PFPos &pos)
135 {
136 m_old = pos;
137 m_err = EC_NONE;
138 m_exitdir = TrackdirToExitdir(m_old.td);
139
140 if (m_old.InWormhole()) {
141 FollowWormhole();
142 } else {
143 switch (CheckOldTile()) {
144 case TR_NO_WAY:
145 m_err = EC_NO_WAY;
146 return false;
147 case TR_REVERSE:
148 m_new.tile = m_old.tile;
149 m_new.wormhole = INVALID_TILE;
150 m_new.td = ReverseTrackdir(m_old.td);
151 m_new.trackdirs = TrackdirToTrackdirBits(m_new.td);
152 m_exitdir = ReverseDiagDir(m_exitdir);
153 m_tiles_skipped = 0;
154 m_flag = TF_NONE;
155 return true;
156 default:
157 break;
158 }
159 FollowTileExit();
160 }
161
162 if (m_new.InWormhole()) {
163 assert(StepWormhole());
164 m_new.td = DiagDirToDiagTrackdir(m_exitdir);
165 m_new.trackdirs = TrackdirToTrackdirBits(m_new.td);
166 return true;
167 }
168
169 if (!CheckNewTile() || (m_new.trackdirs &= DiagdirReachesTrackdirs(m_exitdir)) == TRACKDIR_BIT_NONE) {
170 /* In case we can't enter the next tile, but are
171 * a normal road vehicle, then we can actually
172 * try to reverse as this is the end of the road.
173 * Trams can only turn on the appropriate bits in
174 * which case reaching this would mean a dead end
175 * near a building and in that case there would
176 * a "false" QueryNewTileTrackStatus result and
177 * as such reversing is already tried. The fact
178 * that function failed can have to do with a
179 * missing road bit, or inability to connect the
180 * different bits due to slopes. */
181 return TryReverse();
182 }
183 if (!m_allow_90deg) {
184 m_new.trackdirs &= (TrackdirBits)~(int)TrackdirCrossesTrackdirs(m_old.td);
185 if (m_new.trackdirs == TRACKDIR_BIT_NONE) {
186 m_err = EC_90DEG;
187 return false;
188 }
189 }
190 /* Check if the resulting trackdirs is a single trackdir */
191 m_new.SetTrackdir();
192 return true;
193 }
194
195 inline bool FollowNext()
196 {
197 assert(m_new.tile != INVALID_TILE);
198 assert(m_new.IsTrackdirSet());
199 return Follow(m_new);
200 }
201
202 inline void SetPos(const PFPos &pos)
203 {
204 m_new.PFPos::operator = (pos);
205 m_new.trackdirs = TrackdirToTrackdirBits(pos.td);
206 }
207
208 inline bool MaskReservedTracks()
209 {
210 if (!m_mask_reserved) return true;
211
212 if (m_flag == TF_STATION) {
213 /* Check skipped station tiles as well. */
214 TileIndexDiff diff = TileOffsByDiagDir(m_exitdir);
215 for (TileIndex tile = m_new.tile - diff * m_tiles_skipped; tile != m_new.tile; tile += diff) {
216 if (HasStationReservation(tile)) {
217 m_new.td = INVALID_TRACKDIR;
218 m_new.trackdirs = TRACKDIR_BIT_NONE;
219 m_err = EC_RESERVED;
220 return false;
221 }
222 }
223 }
224
225 if (m_new.InWormhole()) {
226 assert(m_new.IsTrackdirSet());
227 if (HasReservedPos(m_new)) {
228 m_new.td = INVALID_TRACKDIR;
229 m_new.trackdirs = TRACKDIR_BIT_NONE;
230 m_err = EC_RESERVED;
231 return false;
232 } else {
233 return true;
234 }
235 }
236
237 TrackBits reserved = GetReservedTrackbits(m_new.tile);
238 /* Mask already reserved trackdirs. */
239 m_new.trackdirs &= ~TrackBitsToTrackdirBits(reserved);
240 /* Mask out all trackdirs that conflict with the reservation. */
241 Track t;
242 FOR_EACH_SET_TRACK(t, TrackdirBitsToTrackBits(m_new.trackdirs)) {
243 if (TracksOverlap(reserved | TrackToTrackBits(t))) m_new.trackdirs &= ~TrackToTrackdirBits(t);
244 }
245 if (m_new.trackdirs == TRACKDIR_BIT_NONE) {
246 m_new.td = INVALID_TRACKDIR;
247 m_err = EC_RESERVED;
248 return false;
249 }
250 /* Check if the resulting trackdirs is a single trackdir */
251 m_new.SetTrackdir();
252 return true;
253 }
254
255 protected:
256 /** Follow m_exitdir from m_old and fill m_new.tile and m_tiles_skipped */
257 inline void FollowTileExit()
258 {
259 assert(!m_old.InWormhole());
260 /* extra handling for bridges in our direction */
261 if (IsBridgeHeadTile(m_old.tile)) {
262 if (m_exitdir == GetTunnelBridgeDirection(m_old.tile)) {
263 /* we are entering the bridge */
264 m_flag = TF_BRIDGE;
265 m_new.tile = GetOtherBridgeEnd(m_old.tile);
266 m_tiles_skipped = GetTunnelBridgeLength(m_new.tile, m_old.tile);
267 if (StepWormhole() && m_tiles_skipped > 0) {
268 m_tiles_skipped--;
269 m_new.wormhole = m_new.tile;
270 m_new.tile = TILE_ADD(m_new.tile, TileOffsByDiagDir(ReverseDiagDir(m_exitdir)));
271 } else {
272 m_new.wormhole = INVALID_TILE;
273 }
274 return;
275 }
276 /* extra handling for tunnels in our direction */
277 } else if (IsTunnelTile(m_old.tile)) {
278 DiagDirection enterdir = GetTunnelBridgeDirection(m_old.tile);
279 if (enterdir == m_exitdir) {
280 /* we are entering the tunnel */
281 m_flag = TF_TUNNEL;
282 m_new.tile = GetOtherTunnelEnd(m_old.tile);
283 m_tiles_skipped = GetTunnelBridgeLength(m_new.tile, m_old.tile);
284 if (StepWormhole() && m_tiles_skipped > 0) {
285 m_tiles_skipped--;
286 m_new.wormhole = m_new.tile;
287 m_new.tile = TILE_ADD(m_new.tile, TileOffsByDiagDir(ReverseDiagDir(m_exitdir)));
288 } else {
289 m_new.wormhole = INVALID_TILE;
290 }
291 return;
292 }
293 assert(ReverseDiagDir(enterdir) == m_exitdir);
294 }
295
296 /* normal or station tile, do one step */
297 TileIndexDiff diff = TileOffsByDiagDir(m_exitdir);
298 m_new.tile = TILE_ADD(m_old.tile, diff);
299 m_new.wormhole = INVALID_TILE;
300
301 /* special handling for stations */
302 if (IsRailTT() && HasStationTileRail(m_new.tile)) {
303 m_flag = TF_STATION;
304 } else if (IsRoadTT() && IsRoadStopTile(m_new.tile)) {
305 m_flag = TF_STATION;
306 } else {
307 m_flag = TF_NONE;
308 }
309
310 m_tiles_skipped = 0;
311 }
312
313 /** Follow m_old when in a wormhole */
314 inline void FollowWormhole()
315 {
316 assert(m_old.InWormhole());
317 assert(IsBridgeHeadTile(m_old.wormhole) || IsTunnelTile(m_old.wormhole));
318
319 m_new.tile = m_old.wormhole;
320 m_new.wormhole = INVALID_TILE;
321 m_flag = IsTileSubtype(m_old.wormhole, TT_BRIDGE) ? TF_BRIDGE : TF_TUNNEL;
322 m_tiles_skipped = GetTunnelBridgeLength(m_new.tile, m_old.tile);
323 }
324
325 /** check old tile */
326 inline TileResult CheckOldTile()
327 {
328 assert(((GetTrackStatusTrackdirBits(m_old.tile) & TrackdirToTrackdirBits(m_old.td)) != 0) ||
329 (IsTram() && GetSingleTramBit(m_old.tile) != INVALID_DIAGDIR)); // Disable the assertion for single tram bits
330
331 /* rail and road depots cause reversing */
332 if (!IsWaterTT() && IsDepotTypeTile(m_old.tile, TT())) {
333 DiagDirection exitdir = GetGroundDepotDirection(m_old.tile);
334 if (exitdir != m_exitdir) {
335 assert(exitdir == ReverseDiagDir(m_exitdir));
336 return TR_REVERSE;
337 }
338 }
339
340 /* single tram bits cause reversing */
341 if (IsTram() && GetSingleTramBit(m_old.tile) == ReverseDiagDir(m_exitdir)) {
342 return TR_REVERSE;
343 }
344
345 /* road stop can be left at one direction only unless it's a drive-through stop */
346 if (IsRoadTT() && IsStandardRoadStopTile(m_old.tile)) {
347 DiagDirection exitdir = GetRoadStopDir(m_old.tile);
348 if (exitdir != m_exitdir) {
349 return TR_NO_WAY;
350 }
351 }
352
353 /* single tram bits can only be left in one direction */
354 if (IsTram()) {
355 DiagDirection single_tram = GetSingleTramBit(m_old.tile);
356 if (single_tram != INVALID_DIAGDIR && single_tram != m_exitdir) {
357 return TR_NO_WAY;
358 }
359 }
360
361 /* road depots can be also left in one direction only */
362 if (IsRoadTT() && IsDepotTypeTile(m_old.tile, TT())) {
363 DiagDirection exitdir = GetGroundDepotDirection(m_old.tile);
364 if (exitdir != m_exitdir) {
365 return TR_NO_WAY;
366 }
367 }
368
369 return TR_NORMAL;
370 }
371
372 /** stores track status (available trackdirs) for the new tile into m_new.trackdirs */
373 inline bool CheckNewTile()
374 {
375 {
376 CPerfStart perf(*m_pPerf);
377 if (IsRailTT() && IsNormalRailTile(m_new.tile)) {
378 m_new.trackdirs = TrackBitsToTrackdirBits(GetTrackBits(m_new.tile));
379 } else {
380 m_new.trackdirs = GetTrackStatusTrackdirBits(m_new.tile);
381
382 if (IsTram() && m_new.trackdirs == 0) {
383 /* GetTileRoadStatus() returns 0 for single tram bits.
384 * As we cannot change it there (easily) without breaking something, change it here */
385 switch (GetSingleTramBit(m_new.tile)) {
386 case DIAGDIR_NE:
387 case DIAGDIR_SW:
388 m_new.trackdirs = TRACKDIR_BIT_X_NE | TRACKDIR_BIT_X_SW;
389 break;
390
391 case DIAGDIR_NW:
392 case DIAGDIR_SE:
393 m_new.trackdirs = TRACKDIR_BIT_Y_NW | TRACKDIR_BIT_Y_SE;
394 break;
395
396 default: break;
397 }
398 }
399 }
400
401 if (m_new.trackdirs == TRACKDIR_BIT_NONE) return false;
402 }
403
404 if (IsRoadTT() && IsStandardRoadStopTile(m_new.tile)) {
405 /* road stop can be entered from one direction only unless it's a drive-through stop */
406 DiagDirection exitdir = GetRoadStopDir(m_new.tile);
407 if (ReverseDiagDir(exitdir) != m_exitdir) {
408 m_err = EC_NO_WAY;
409 return false;
410 }
411 }
412
413 /* single tram bits can only be entered from one direction */
414 if (IsTram()) {
415 DiagDirection single_tram = GetSingleTramBit(m_new.tile);
416 if (single_tram != INVALID_DIAGDIR && single_tram != ReverseDiagDir(m_exitdir)) {
417 m_err = EC_NO_WAY;
418 return false;
419 }
420 }
421
422 /* road and rail depots can also be entered from one direction only */
423 if (IsRoadTT() && IsDepotTypeTile(m_new.tile, TT())) {
424 DiagDirection exitdir = GetGroundDepotDirection(m_new.tile);
425 if (ReverseDiagDir(exitdir) != m_exitdir) {
426 m_err = EC_NO_WAY;
427 return false;
428 }
429 /* don't try to enter other company's depots */
430 if (GetTileOwner(m_new.tile) != m_veh_owner) {
431 m_err = EC_OWNER;
432 return false;
433 }
434 }
435 if (IsRailTT() && IsDepotTypeTile(m_new.tile, TT())) {
436 DiagDirection exitdir = GetGroundDepotDirection(m_new.tile);
437 if (ReverseDiagDir(exitdir) != m_exitdir) {
438 m_err = EC_NO_WAY;
439 return false;
440 }
441 }
442
443 /* rail transport is possible only on tiles with the same owner as vehicle */
444 if (IsRailTT() && GetTileOwner(m_new.tile) != m_veh_owner) {
445 /* different owner */
446 m_err = EC_NO_WAY;
447 return false;
448 }
449
450 /* rail transport is possible only on compatible rail types */
451 if (IsRailTT()) {
452 RailType rail_type;
453 if (IsRailwayTile(m_new.tile)) {
454 rail_type = GetSideRailType(m_new.tile, ReverseDiagDir(m_exitdir));
455 if (rail_type == INVALID_RAILTYPE) {
456 m_err = EC_NO_WAY;
457 return false;
458 }
459 } else {
460 rail_type = GetTileRailType(m_new.tile);
461 }
462 if (!HasBit(m_railtypes, rail_type)) {
463 /* incompatible rail type */
464 m_err = EC_RAIL_TYPE;
465 return false;
466 }
467 }
468
469 /* tunnel holes and bridge ramps can be entered only from proper direction */
470 if (IsTunnelTile(m_new.tile)) {
471 if (m_flag != TF_TUNNEL) {
472 DiagDirection tunnel_enterdir = GetTunnelBridgeDirection(m_new.tile);
473 if (tunnel_enterdir != m_exitdir) {
474 m_err = EC_NO_WAY;
475 return false;
476 }
477 }
478 } else if (IsBridgeHeadTile(m_new.tile)) {
479 if (m_flag != TF_BRIDGE) {
480 DiagDirection ramp_enderdir = GetTunnelBridgeDirection(m_new.tile);
481 if (ramp_enderdir == ReverseDiagDir(m_exitdir)) {
482 m_err = EC_NO_WAY;
483 return false;
484 }
485 }
486 }
487
488 /* special handling for rail stations - get to the end of platform */
489 if (IsRailTT() && m_flag == TF_STATION) {
490 /* entered railway station
491 * get platform length */
492 uint length = BaseStation::GetByTile(m_new.tile)->GetPlatformLength(m_new.tile, TrackdirToExitdir(m_old.td));
493 /* how big step we must do to get to the last platform tile; */
494 m_tiles_skipped = length - 1;
495 /* move to the platform end */
496 TileIndexDiff diff = TileOffsByDiagDir(m_exitdir);
497 diff *= m_tiles_skipped;
498 m_new.tile = TILE_ADD(m_new.tile, diff);
499 return true;
500 }
501
502 return true;
503 }
504
505 /** return true if we successfully reversed at end of road/track */
506 inline bool TryReverse()
507 {
508 if (IsRoadTT() && !IsTram()) {
509 /* if we reached the end of road, we can reverse the RV and continue moving */
510 m_exitdir = ReverseDiagDir(m_exitdir);
511 /* new tile will be the same as old one */
512 m_new.tile = m_old.tile;
513 m_new.wormhole = INVALID_TILE;
514 /* set new trackdir bits to all reachable trackdirs */
515 m_new.trackdirs = GetTrackStatusTrackdirBits(m_new.tile);
516 m_new.trackdirs &= DiagdirReachesTrackdirs(m_exitdir);
517 /* we always have some trackdirs reachable after reversal */
518 assert(m_new.trackdirs != TRACKDIR_BIT_NONE);
519 /* check if the resulting trackdirs is a single trackdir */
520 m_new.SetTrackdir();
521 return true;
522 }
523 m_new.td = INVALID_TRACKDIR;
524 m_err = EC_NO_WAY;
525 return false;
526 }
527
528 public:
529 /** Helper for pathfinders - get min/max speed on m_old */
530 int GetSpeedLimit(int *pmin_speed = NULL) const
531 {
532 int min_speed = 0;
533 int max_speed = INT_MAX; // no limit
534
535 if (IsRailTT()) {
536 /* Check for on-bridge and railtype speed limit */
537 TileIndex bridge_tile;
538 RailType rt;
539
540 if (!m_old.InWormhole()) {
541 bridge_tile = IsRailBridgeTile(m_old.tile) ? m_old.tile : INVALID_TILE;
542 rt = GetRailType(m_old.tile, TrackdirToTrack(m_old.td));
543 } else if (IsTileSubtype(m_old.wormhole, TT_BRIDGE)) {
544 bridge_tile = m_old.wormhole;
545 rt = GetBridgeRailType(bridge_tile);
546 } else {
547 bridge_tile = INVALID_TILE;
548 rt = GetRailType(m_old.wormhole);
549 }
550
551 /* Check for on-bridge speed limit */
552 if (bridge_tile != INVALID_TILE) {
553 int spd = GetBridgeSpec(GetRailBridgeType(bridge_tile))->speed;
554 if (max_speed > spd) max_speed = spd;
555 }
556
557 /* Check for speed limit imposed by railtype */
558 uint16 rail_speed = GetRailTypeInfo(rt)->max_speed;
559 if (rail_speed > 0) max_speed = min(max_speed, rail_speed);
560 } else if (IsRoadTT()) {
561 /* Check for on-bridge speed limit */
562 if (IsRoadBridgeTile(m_old.tile)) {
563 int spd = 2 * GetBridgeSpec(GetRoadBridgeType(m_old.tile))->speed;
564 if (max_speed > spd) max_speed = spd;
565 }
566 }
567
568 /* if min speed was requested, return it */
569 if (pmin_speed != NULL) *pmin_speed = min_speed;
570 return max_speed;
571 }
572 };
573
574 template <TransportType Ttr_type_, typename VehicleType, bool T90deg_turns_allowed, bool Twormhole = false, bool Tmask_reserved_tracks = false>
575 struct CFollowTrackT : CFollowTrack<Ttr_type_, VehicleType, Twormhole>
576 {
577 inline CFollowTrackT(const VehicleType *v = NULL, RailTypes railtype_override = INVALID_RAILTYPES, CPerformanceTimer *pPerf = NULL)
578 : CFollowTrack<Ttr_type_, VehicleType, Twormhole>(v, T90deg_turns_allowed, Tmask_reserved_tracks, railtype_override, pPerf)
579 {
580 }
581
582 inline static bool Allow90degTurns() { return T90deg_turns_allowed; }
583 inline static bool DoTrackMasking() { return Tmask_reserved_tracks; }
584 };
585
586 typedef CFollowTrackT<TRANSPORT_WATER, Ship, true > CFollowTrackWater90;
587 typedef CFollowTrackT<TRANSPORT_WATER, Ship, false> CFollowTrackWaterNo90;
588
589 typedef CFollowTrackT<TRANSPORT_ROAD, RoadVehicle, true > CFollowTrackRoad;
590
591 typedef CFollowTrackT<TRANSPORT_RAIL, Train, true, true> CFollowTrackRail90;
592 typedef CFollowTrackT<TRANSPORT_RAIL, Train, false, true> CFollowTrackRailNo90;
593 typedef CFollowTrackT<TRANSPORT_RAIL, Train, true, true, true > CFollowTrackFreeRail90;
594 typedef CFollowTrackT<TRANSPORT_RAIL, Train, false, true, true > CFollowTrackFreeRailNo90;
595
596 struct CFollowTrackRail : CFollowTrack<TRANSPORT_RAIL, Train, true>
597 {
598 inline CFollowTrackRail(const Train *v = NULL, bool allow_90deg = true, bool railtype_override = false)
599 : CFollowTrack<TRANSPORT_RAIL, Train, true>(v, allow_90deg, false, railtype_override ? GetRailTypeInfo(v->railtype)->compatible_railtypes : INVALID_RAILTYPES)
600 {
601 }
602
603 inline CFollowTrackRail(Owner o, bool allow_90deg = true, RailTypes railtype_override = INVALID_RAILTYPES)
604 : CFollowTrack<TRANSPORT_RAIL, Train, true>(o, allow_90deg, false, railtype_override)
605 {
606 }
607 };
608
609 #endif /* FOLLOW_TRACK_HPP */