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00012 #include "../../stdafx.h"
00013
00014 #include "yapf.hpp"
00015 #include "yapf_cache.h"
00016 #include "yapf_node_rail.hpp"
00017 #include "yapf_costrail.hpp"
00018 #include "yapf_destrail.hpp"
00019 #include "../../functions.h"
00020
00021 #define DEBUG_YAPF_CACHE 0
00022
00023 #if DEBUG_YAPF_CACHE
00024 template <typename Tpf> void DumpState(Tpf &pf1, Tpf &pf2)
00025 {
00026 DumpTarget dmp1, dmp2;
00027 pf1.DumpBase(dmp1);
00028 pf2.DumpBase(dmp2);
00029 FILE *f1 = fopen("yapf1.txt", "wt");
00030 FILE *f2 = fopen("yapf2.txt", "wt");
00031 fwrite(dmp1.m_out.Data(), 1, dmp1.m_out.Size(), f1);
00032 fwrite(dmp2.m_out.Data(), 1, dmp2.m_out.Size(), f2);
00033 fclose(f1);
00034 fclose(f2);
00035 }
00036 #endif
00037
00038 int _total_pf_time_us = 0;
00039
00040 template <class Types>
00041 class CYapfReserveTrack
00042 {
00043 public:
00044 typedef typename Types::Tpf Tpf;
00045 typedef typename Types::TrackFollower TrackFollower;
00046 typedef typename Types::NodeList::Titem Node;
00047
00048 protected:
00050 FORCEINLINE Tpf& Yapf()
00051 {
00052 return *static_cast<Tpf*>(this);
00053 }
00054
00055 private:
00056 TileIndex m_res_dest;
00057 Trackdir m_res_dest_td;
00058 Node *m_res_node;
00059 TileIndex m_res_fail_tile;
00060 Trackdir m_res_fail_td;
00061
00062 bool FindSafePositionProc(TileIndex tile, Trackdir td)
00063 {
00064 if (IsSafeWaitingPosition(Yapf().GetVehicle(), tile, td, true, !TrackFollower::Allow90degTurns())) {
00065 m_res_dest = tile;
00066 m_res_dest_td = td;
00067 return false;
00068 }
00069 return true;
00070 }
00071
00073 bool ReserveRailStationPlatform(TileIndex &tile, DiagDirection dir)
00074 {
00075 TileIndex start = tile;
00076 TileIndexDiff diff = TileOffsByDiagDir(dir);
00077
00078 do {
00079 if (HasStationReservation(tile)) return false;
00080 SetRailStationReservation(tile, true);
00081 MarkTileDirtyByTile(tile);
00082 tile = TILE_ADD(tile, diff);
00083 } while (IsCompatibleTrainStationTile(tile, start));
00084
00085 return true;
00086 }
00087
00089 bool ReserveSingleTrack(TileIndex tile, Trackdir td)
00090 {
00091 if (IsRailStationTile(tile)) {
00092 if (!ReserveRailStationPlatform(tile, TrackdirToExitdir(ReverseTrackdir(td)))) {
00093
00094 m_res_fail_tile = tile;
00095 m_res_fail_td = td;
00096 }
00097 } else {
00098 if (!TryReserveRailTrack(tile, TrackdirToTrack(td))) {
00099
00100 m_res_fail_tile = tile;
00101 m_res_fail_td = td;
00102 return false;
00103 }
00104 }
00105
00106 return tile != m_res_dest || td != m_res_dest_td;
00107 }
00108
00110 bool UnreserveSingleTrack(TileIndex tile, Trackdir td)
00111 {
00112 if (IsRailStationTile(tile)) {
00113 TileIndex start = tile;
00114 TileIndexDiff diff = TileOffsByDiagDir(TrackdirToExitdir(ReverseTrackdir(td)));
00115 while ((tile != m_res_fail_tile || td != m_res_fail_td) && IsCompatibleTrainStationTile(tile, start)) {
00116 SetRailStationReservation(tile, false);
00117 tile = TILE_ADD(tile, diff);
00118 }
00119 } else if (tile != m_res_fail_tile || td != m_res_fail_td) {
00120 UnreserveRailTrack(tile, TrackdirToTrack(td));
00121 }
00122 return (tile != m_res_dest || td != m_res_dest_td) && (tile != m_res_fail_tile || td != m_res_fail_td);
00123 }
00124
00125 public:
00127 inline void SetReservationTarget(Node *node, TileIndex tile, Trackdir td)
00128 {
00129 m_res_node = node;
00130 m_res_dest = tile;
00131 m_res_dest_td = td;
00132 }
00133
00135 inline void FindSafePositionOnNode(Node *node)
00136 {
00137 assert(node->m_parent != NULL);
00138
00139
00140 if (node->m_parent->m_num_signals_passed >= 2) return;
00141
00142 if (!node->IterateTiles(Yapf().GetVehicle(), Yapf(), *this, &CYapfReserveTrack<Types>::FindSafePositionProc)) {
00143 m_res_node = node;
00144 }
00145 }
00146
00148 bool TryReservePath(PBSTileInfo *target)
00149 {
00150 m_res_fail_tile = INVALID_TILE;
00151
00152 if (target != NULL) {
00153 target->tile = m_res_dest;
00154 target->trackdir = m_res_dest_td;
00155 target->okay = false;
00156 }
00157
00158
00159 if (!IsWaitingPositionFree(Yapf().GetVehicle(), m_res_dest, m_res_dest_td)) return false;
00160
00161 for (Node *node = m_res_node; node->m_parent != NULL; node = node->m_parent) {
00162 node->IterateTiles(Yapf().GetVehicle(), Yapf(), *this, &CYapfReserveTrack<Types>::ReserveSingleTrack);
00163 if (m_res_fail_tile != INVALID_TILE) {
00164
00165 Node *fail_node = m_res_node;
00166 TileIndex stop_tile = m_res_fail_tile;
00167 do {
00168
00169 m_res_fail_tile = fail_node == node ? stop_tile : INVALID_TILE;
00170 fail_node->IterateTiles(Yapf().GetVehicle(), Yapf(), *this, &CYapfReserveTrack<Types>::UnreserveSingleTrack);
00171 } while (fail_node != node && (fail_node = fail_node->m_parent) != NULL);
00172
00173 return false;
00174 }
00175 }
00176
00177 if (target != NULL) target->okay = true;
00178
00179 if (Yapf().CanUseGlobalCache(*m_res_node)) {
00180 YapfNotifyTrackLayoutChange(INVALID_TILE, INVALID_TRACK);
00181 }
00182
00183 return true;
00184 }
00185 };
00186
00187 template <class Types>
00188 class CYapfFollowAnyDepotRailT
00189 {
00190 public:
00191 typedef typename Types::Tpf Tpf;
00192 typedef typename Types::TrackFollower TrackFollower;
00193 typedef typename Types::NodeList::Titem Node;
00194 typedef typename Node::Key Key;
00195
00196 protected:
00198 FORCEINLINE Tpf& Yapf()
00199 {
00200 return *static_cast<Tpf*>(this);
00201 }
00202
00203 public:
00209 inline void PfFollowNode(Node& old_node)
00210 {
00211 TrackFollower F(Yapf().GetVehicle());
00212 if (F.Follow(old_node.GetLastTile(), old_node.GetLastTrackdir())) {
00213 Yapf().AddMultipleNodes(&old_node, F);
00214 }
00215 }
00216
00218 FORCEINLINE char TransportTypeChar() const
00219 {
00220 return 't';
00221 }
00222
00223 static bool stFindNearestDepotTwoWay(const Train *v, TileIndex t1, Trackdir td1, TileIndex t2, Trackdir td2, int max_penalty, int reverse_penalty, TileIndex *depot_tile, bool *reversed)
00224 {
00225 Tpf pf1;
00226
00227
00228
00229
00230
00231
00232
00233
00234
00235 if (max_penalty != 0) pf1.DisableCache(true);
00236 bool result1 = pf1.FindNearestDepotTwoWay(v, t1, td1, t2, td2, max_penalty, reverse_penalty, depot_tile, reversed);
00237
00238 #if DEBUG_YAPF_CACHE
00239 Tpf pf2;
00240 TileIndex depot_tile2 = INVALID_TILE;
00241 bool reversed2 = false;
00242 pf2.DisableCache(true);
00243 bool result2 = pf2.FindNearestDepotTwoWay(v, t1, td1, t2, td2, max_penalty, reverse_penalty, &depot_tile2, &reversed2);
00244 if (result1 != result2 || (result1 && (*depot_tile != depot_tile2 || *reversed != reversed2))) {
00245 DEBUG(yapf, 0, "CACHE ERROR: FindNearestDepotTwoWay() = [%s, %s]", result1 ? "T" : "F", result2 ? "T" : "F");
00246 DumpState(pf1, pf2);
00247 }
00248 #endif
00249
00250 return result1;
00251 }
00252
00253 FORCEINLINE bool FindNearestDepotTwoWay(const Train *v, TileIndex t1, Trackdir td1, TileIndex t2, Trackdir td2, int max_penalty, int reverse_penalty, TileIndex *depot_tile, bool *reversed)
00254 {
00255
00256 Yapf().SetOrigin(t1, td1, t2, td2, reverse_penalty, true);
00257 Yapf().SetDestination(v);
00258 Yapf().SetMaxCost(max_penalty);
00259
00260
00261 bool bFound = Yapf().FindPath(v);
00262 if (!bFound) return false;
00263
00264
00265
00266 Node *n = Yapf().GetBestNode();
00267 *depot_tile = n->GetLastTile();
00268
00269
00270 Node *pNode = n;
00271 while (pNode->m_parent != NULL) {
00272 pNode = pNode->m_parent;
00273 }
00274
00275
00276
00277 *reversed = (pNode->m_cost != 0);
00278
00279 return true;
00280 }
00281 };
00282
00283 template <class Types>
00284 class CYapfFollowAnySafeTileRailT : public CYapfReserveTrack<Types>
00285 {
00286 public:
00287 typedef typename Types::Tpf Tpf;
00288 typedef typename Types::TrackFollower TrackFollower;
00289 typedef typename Types::NodeList::Titem Node;
00290 typedef typename Node::Key Key;
00291
00292 protected:
00294 FORCEINLINE Tpf& Yapf()
00295 {
00296 return *static_cast<Tpf*>(this);
00297 }
00298
00299 public:
00305 inline void PfFollowNode(Node& old_node)
00306 {
00307 TrackFollower F(Yapf().GetVehicle(), Yapf().GetCompatibleRailTypes());
00308 if (F.Follow(old_node.GetLastTile(), old_node.GetLastTrackdir()) && F.MaskReservedTracks()) {
00309 Yapf().AddMultipleNodes(&old_node, F);
00310 }
00311 }
00312
00314 FORCEINLINE char TransportTypeChar() const
00315 {
00316 return 't';
00317 }
00318
00319 static bool stFindNearestSafeTile(const Train *v, TileIndex t1, Trackdir td, bool override_railtype)
00320 {
00321
00322 Tpf pf1;
00323 #if !DEBUG_YAPF_CACHE
00324 bool result1 = pf1.FindNearestSafeTile(v, t1, td, override_railtype, false);
00325
00326 #else
00327 bool result2 = pf1.FindNearestSafeTile(v, t1, td, override_railtype, true);
00328 Tpf pf2;
00329 pf2.DisableCache(true);
00330 bool result1 = pf2.FindNearestSafeTile(v, t1, td, override_railtype, false);
00331 if (result1 != result2) {
00332 DEBUG(yapf, 0, "CACHE ERROR: FindSafeTile() = [%s, %s]", result2 ? "T" : "F", result1 ? "T" : "F");
00333 DumpState(pf1, pf2);
00334 }
00335 #endif
00336
00337 return result1;
00338 }
00339
00340 bool FindNearestSafeTile(const Train *v, TileIndex t1, Trackdir td, bool override_railtype, bool dont_reserve)
00341 {
00342
00343 Yapf().SetOrigin(t1, td);
00344 Yapf().SetDestination(v, override_railtype);
00345
00346 bool bFound = Yapf().FindPath(v);
00347 if (!bFound) return false;
00348
00349
00350 Node *pNode = Yapf().GetBestNode();
00351 this->SetReservationTarget(pNode, pNode->GetLastTile(), pNode->GetLastTrackdir());
00352
00353
00354 Node *pPrev = NULL;
00355 while (pNode->m_parent != NULL) {
00356 pPrev = pNode;
00357 pNode = pNode->m_parent;
00358
00359 this->FindSafePositionOnNode(pPrev);
00360 }
00361
00362 return dont_reserve || this->TryReservePath(NULL);
00363 }
00364 };
00365
00366 template <class Types>
00367 class CYapfFollowRailT : public CYapfReserveTrack<Types>
00368 {
00369 public:
00370 typedef typename Types::Tpf Tpf;
00371 typedef typename Types::TrackFollower TrackFollower;
00372 typedef typename Types::NodeList::Titem Node;
00373 typedef typename Node::Key Key;
00374
00375 protected:
00377 FORCEINLINE Tpf& Yapf()
00378 {
00379 return *static_cast<Tpf*>(this);
00380 }
00381
00382 public:
00388 inline void PfFollowNode(Node& old_node)
00389 {
00390 TrackFollower F(Yapf().GetVehicle());
00391 if (F.Follow(old_node.GetLastTile(), old_node.GetLastTrackdir())) {
00392 Yapf().AddMultipleNodes(&old_node, F);
00393 }
00394 }
00395
00397 FORCEINLINE char TransportTypeChar() const
00398 {
00399 return 't';
00400 }
00401
00402 static Trackdir stChooseRailTrack(const Train *v, TileIndex tile, DiagDirection enterdir, TrackBits tracks, bool &path_found, bool reserve_track, PBSTileInfo *target)
00403 {
00404
00405 Tpf pf1;
00406 #if !DEBUG_YAPF_CACHE
00407 Trackdir result1 = pf1.ChooseRailTrack(v, tile, enterdir, tracks, path_found, reserve_track, target);
00408
00409 #else
00410 Trackdir result1 = pf1.ChooseRailTrack(v, tile, enterdir, tracks, path_found, false, NULL);
00411 Tpf pf2;
00412 pf2.DisableCache(true);
00413 Trackdir result2 = pf2.ChooseRailTrack(v, tile, enterdir, tracks, path_found, reserve_track, target);
00414 if (result1 != result2) {
00415 DEBUG(yapf, 0, "CACHE ERROR: ChooseRailTrack() = [%d, %d]", result1, result2);
00416 DumpState(pf1, pf2);
00417 }
00418 #endif
00419
00420 return result1;
00421 }
00422
00423 FORCEINLINE Trackdir ChooseRailTrack(const Train *v, TileIndex tile, DiagDirection enterdir, TrackBits tracks, bool &path_found, bool reserve_track, PBSTileInfo *target)
00424 {
00425 if (target != NULL) target->tile = INVALID_TILE;
00426
00427
00428 PBSTileInfo origin = FollowTrainReservation(v);
00429 Yapf().SetOrigin(origin.tile, origin.trackdir, INVALID_TILE, INVALID_TRACKDIR, 1, true);
00430 Yapf().SetDestination(v);
00431
00432
00433 path_found = Yapf().FindPath(v);
00434
00435
00436 Trackdir next_trackdir = INVALID_TRACKDIR;
00437 Node *pNode = Yapf().GetBestNode();
00438 if (pNode != NULL) {
00439
00440 this->SetReservationTarget(pNode, pNode->GetLastTile(), pNode->GetLastTrackdir());
00441
00442
00443
00444 Node *pPrev = NULL;
00445 while (pNode->m_parent != NULL) {
00446 pPrev = pNode;
00447 pNode = pNode->m_parent;
00448
00449 this->FindSafePositionOnNode(pPrev);
00450 }
00451
00452 Node& best_next_node = *pPrev;
00453 next_trackdir = best_next_node.GetTrackdir();
00454
00455 if (reserve_track && path_found) this->TryReservePath(target);
00456 }
00457
00458
00459 path_found |= Yapf().m_stopped_on_first_two_way_signal;
00460 return next_trackdir;
00461 }
00462
00463 static bool stCheckReverseTrain(const Train *v, TileIndex t1, Trackdir td1, TileIndex t2, Trackdir td2, int reverse_penalty)
00464 {
00465 Tpf pf1;
00466 bool result1 = pf1.CheckReverseTrain(v, t1, td1, t2, td2, reverse_penalty);
00467
00468 #if DEBUG_YAPF_CACHE
00469 Tpf pf2;
00470 pf2.DisableCache(true);
00471 bool result2 = pf2.CheckReverseTrain(v, t1, td1, t2, td2, reverse_penalty);
00472 if (result1 != result2) {
00473 DEBUG(yapf, 0, "CACHE ERROR: CheckReverseTrain() = [%s, %s]", result1 ? "T" : "F", result2 ? "T" : "F");
00474 DumpState(pf1, pf2);
00475 }
00476 #endif
00477
00478 return result1;
00479 }
00480
00481 FORCEINLINE bool CheckReverseTrain(const Train *v, TileIndex t1, Trackdir td1, TileIndex t2, Trackdir td2, int reverse_penalty)
00482 {
00483
00484
00485 Yapf().SetOrigin(t1, td1, t2, td2, reverse_penalty, false);
00486 Yapf().SetDestination(v);
00487
00488
00489 bool bFound = Yapf().FindPath(v);
00490
00491 if (!bFound) return false;
00492
00493
00494
00495 Node *pNode = Yapf().GetBestNode();
00496 while (pNode->m_parent != NULL) {
00497 pNode = pNode->m_parent;
00498 }
00499
00500
00501 Node& best_org_node = *pNode;
00502 bool reversed = (best_org_node.m_cost != 0);
00503 return reversed;
00504 }
00505 };
00506
00507 template <class Tpf_, class Ttrack_follower, class Tnode_list, template <class Types> class TdestinationT, template <class Types> class TfollowT>
00508 struct CYapfRail_TypesT
00509 {
00510 typedef CYapfRail_TypesT<Tpf_, Ttrack_follower, Tnode_list, TdestinationT, TfollowT> Types;
00511
00512 typedef Tpf_ Tpf;
00513 typedef Ttrack_follower TrackFollower;
00514 typedef Tnode_list NodeList;
00515 typedef Train VehicleType;
00516 typedef CYapfBaseT<Types> PfBase;
00517 typedef TfollowT<Types> PfFollow;
00518 typedef CYapfOriginTileTwoWayT<Types> PfOrigin;
00519 typedef TdestinationT<Types> PfDestination;
00520 typedef CYapfSegmentCostCacheGlobalT<Types> PfCache;
00521 typedef CYapfCostRailT<Types> PfCost;
00522 };
00523
00524 struct CYapfRail1 : CYapfT<CYapfRail_TypesT<CYapfRail1 , CFollowTrackRail , CRailNodeListTrackDir, CYapfDestinationTileOrStationRailT, CYapfFollowRailT> > {};
00525 struct CYapfRail2 : CYapfT<CYapfRail_TypesT<CYapfRail2 , CFollowTrackRailNo90, CRailNodeListTrackDir, CYapfDestinationTileOrStationRailT, CYapfFollowRailT> > {};
00526
00527 struct CYapfAnyDepotRail1 : CYapfT<CYapfRail_TypesT<CYapfAnyDepotRail1, CFollowTrackRail , CRailNodeListTrackDir, CYapfDestinationAnyDepotRailT , CYapfFollowAnyDepotRailT> > {};
00528 struct CYapfAnyDepotRail2 : CYapfT<CYapfRail_TypesT<CYapfAnyDepotRail2, CFollowTrackRailNo90, CRailNodeListTrackDir, CYapfDestinationAnyDepotRailT , CYapfFollowAnyDepotRailT> > {};
00529
00530 struct CYapfAnySafeTileRail1 : CYapfT<CYapfRail_TypesT<CYapfAnySafeTileRail1, CFollowTrackFreeRail , CRailNodeListTrackDir, CYapfDestinationAnySafeTileRailT , CYapfFollowAnySafeTileRailT> > {};
00531 struct CYapfAnySafeTileRail2 : CYapfT<CYapfRail_TypesT<CYapfAnySafeTileRail2, CFollowTrackFreeRailNo90, CRailNodeListTrackDir, CYapfDestinationAnySafeTileRailT , CYapfFollowAnySafeTileRailT> > {};
00532
00533
00534 Track YapfTrainChooseTrack(const Train *v, TileIndex tile, DiagDirection enterdir, TrackBits tracks, bool &path_found, bool reserve_track, PBSTileInfo *target)
00535 {
00536
00537 typedef Trackdir (*PfnChooseRailTrack)(const Train*, TileIndex, DiagDirection, TrackBits, bool&, bool, PBSTileInfo*);
00538 PfnChooseRailTrack pfnChooseRailTrack = &CYapfRail1::stChooseRailTrack;
00539
00540
00541 if (_settings_game.pf.forbid_90_deg) {
00542 pfnChooseRailTrack = &CYapfRail2::stChooseRailTrack;
00543 }
00544
00545 Trackdir td_ret = pfnChooseRailTrack(v, tile, enterdir, tracks, path_found, reserve_track, target);
00546 return (td_ret != INVALID_TRACKDIR) ? TrackdirToTrack(td_ret) : FindFirstTrack(tracks);
00547 }
00548
00549 bool YapfTrainCheckReverse(const Train *v)
00550 {
00551 const Train *last_veh = v->Last();
00552
00553
00554 Trackdir td = v->GetVehicleTrackdir();
00555 Trackdir td_rev = ReverseTrackdir(last_veh->GetVehicleTrackdir());
00556
00557
00558 TileIndex tile = v->tile;
00559 TileIndex tile_rev = last_veh->tile;
00560
00561 int reverse_penalty = 0;
00562
00563 if (v->track == TRACK_BIT_WORMHOLE) {
00564
00565 DiagDirection dir_into_wormhole = GetTunnelBridgeDirection(tile);
00566
00567 if (TrackdirToExitdir(td) == dir_into_wormhole) tile = GetOtherTunnelBridgeEnd(tile);
00568
00569
00570
00571 TileIndex cur_tile = TileVirtXY(v->x_pos, v->y_pos);
00572
00573
00574
00575 reverse_penalty -= DistanceManhattan(cur_tile, tile) * YAPF_TILE_LENGTH;
00576 }
00577
00578 if (last_veh->track == TRACK_BIT_WORMHOLE) {
00579
00580 DiagDirection dir_into_wormhole = GetTunnelBridgeDirection(tile_rev);
00581
00582 if (TrackdirToExitdir(td_rev) == dir_into_wormhole) tile_rev = GetOtherTunnelBridgeEnd(tile_rev);
00583
00584
00585
00586 TileIndex cur_tile = TileVirtXY(last_veh->x_pos, last_veh->y_pos);
00587
00588
00589 reverse_penalty += DistanceManhattan(cur_tile, tile_rev) * YAPF_TILE_LENGTH;
00590 }
00591
00592 typedef bool (*PfnCheckReverseTrain)(const Train*, TileIndex, Trackdir, TileIndex, Trackdir, int);
00593 PfnCheckReverseTrain pfnCheckReverseTrain = CYapfRail1::stCheckReverseTrain;
00594
00595
00596 if (_settings_game.pf.forbid_90_deg) {
00597 pfnCheckReverseTrain = &CYapfRail2::stCheckReverseTrain;
00598 }
00599
00600
00601 if (reverse_penalty == 0) reverse_penalty = 1;
00602
00603 bool reverse = pfnCheckReverseTrain(v, tile, td, tile_rev, td_rev, reverse_penalty);
00604
00605 return reverse;
00606 }
00607
00608 FindDepotData YapfTrainFindNearestDepot(const Train *v, int max_penalty)
00609 {
00610 FindDepotData fdd;
00611
00612 const Train *last_veh = v->Last();
00613
00614 PBSTileInfo origin = FollowTrainReservation(v);
00615 TileIndex last_tile = last_veh->tile;
00616 Trackdir td_rev = ReverseTrackdir(last_veh->GetVehicleTrackdir());
00617
00618 typedef bool (*PfnFindNearestDepotTwoWay)(const Train*, TileIndex, Trackdir, TileIndex, Trackdir, int, int, TileIndex*, bool*);
00619 PfnFindNearestDepotTwoWay pfnFindNearestDepotTwoWay = &CYapfAnyDepotRail1::stFindNearestDepotTwoWay;
00620
00621
00622 if (_settings_game.pf.forbid_90_deg) {
00623 pfnFindNearestDepotTwoWay = &CYapfAnyDepotRail2::stFindNearestDepotTwoWay;
00624 }
00625
00626 bool ret = pfnFindNearestDepotTwoWay(v, origin.tile, origin.trackdir, last_tile, td_rev, max_penalty, YAPF_INFINITE_PENALTY, &fdd.tile, &fdd.reverse);
00627 fdd.best_length = ret ? max_penalty / 2 : UINT_MAX;
00628 return fdd;
00629 }
00630
00631 bool YapfTrainFindNearestSafeTile(const Train *v, TileIndex tile, Trackdir td, bool override_railtype)
00632 {
00633 typedef bool (*PfnFindNearestSafeTile)(const Train*, TileIndex, Trackdir, bool);
00634 PfnFindNearestSafeTile pfnFindNearestSafeTile = CYapfAnySafeTileRail1::stFindNearestSafeTile;
00635
00636
00637 if (_settings_game.pf.forbid_90_deg) {
00638 pfnFindNearestSafeTile = &CYapfAnySafeTileRail2::stFindNearestSafeTile;
00639 }
00640
00641 return pfnFindNearestSafeTile(v, tile, td, override_railtype);
00642 }
00643
00645 int CSegmentCostCacheBase::s_rail_change_counter = 0;
00646
00647 void YapfNotifyTrackLayoutChange(TileIndex tile, Track track)
00648 {
00649 CSegmentCostCacheBase::NotifyTrackLayoutChange(tile, track);
00650 }