00001
00002
00005 #include "stdafx.h"
00006 #include "npf.h"
00007 #include "debug.h"
00008 #include "landscape.h"
00009 #include "depot_base.h"
00010 #include "depot_map.h"
00011 #include "network/network.h"
00012 #include "tunnelbridge_map.h"
00013 #include "functions.h"
00014 #include "vehicle_base.h"
00015 #include "tunnelbridge.h"
00016 #include "pbs.h"
00017 #include "settings_type.h"
00018 #include "pathfind.h"
00019
00020 static AyStar _npf_aystar;
00021
00022
00023
00024
00025 #define NPF_STRAIGHT_LENGTH (uint)(NPF_TILE_LENGTH * STRAIGHT_TRACK_LENGTH)
00026 static const uint _trackdir_length[TRACKDIR_END] = {
00027 NPF_TILE_LENGTH, NPF_TILE_LENGTH, NPF_STRAIGHT_LENGTH, NPF_STRAIGHT_LENGTH, NPF_STRAIGHT_LENGTH, NPF_STRAIGHT_LENGTH,
00028 0, 0,
00029 NPF_TILE_LENGTH, NPF_TILE_LENGTH, NPF_STRAIGHT_LENGTH, NPF_STRAIGHT_LENGTH, NPF_STRAIGHT_LENGTH, NPF_STRAIGHT_LENGTH
00030 };
00031
00038 static uint NPFDistanceTrack(TileIndex t0, TileIndex t1)
00039 {
00040 const uint dx = Delta(TileX(t0), TileX(t1));
00041 const uint dy = Delta(TileY(t0), TileY(t1));
00042
00043 const uint straightTracks = 2 * min(dx, dy);
00044
00045
00046
00047
00048 const uint diagTracks = dx + dy - straightTracks;
00049
00050
00051
00052 return diagTracks * NPF_TILE_LENGTH + straightTracks * NPF_TILE_LENGTH * STRAIGHT_TRACK_LENGTH;
00053 }
00054
00055
00056 #if 0
00057 static uint NTPHash(uint key1, uint key2)
00058 {
00059
00060 return PATHFIND_HASH_TILE(key1);
00061 }
00062 #endif
00063
00071 static uint NPFHash(uint key1, uint key2)
00072 {
00073
00074 uint part1 = TileX(key1) & NPF_HASH_HALFMASK;
00075 uint part2 = TileY(key1) & NPF_HASH_HALFMASK;
00076
00077 assert(IsValidTrackdir((Trackdir)key2));
00078 assert(IsValidTile(key1));
00079 return ((part1 << NPF_HASH_HALFBITS | part2) + (NPF_HASH_SIZE * key2 / TRACKDIR_END)) % NPF_HASH_SIZE;
00080 }
00081
00082 static int32 NPFCalcZero(AyStar *as, AyStarNode *current, OpenListNode *parent)
00083 {
00084 return 0;
00085 }
00086
00087
00088
00089
00090 static int32 NPFCalcStationOrTileHeuristic(AyStar *as, AyStarNode *current, OpenListNode *parent)
00091 {
00092 NPFFindStationOrTileData *fstd = (NPFFindStationOrTileData*)as->user_target;
00093 NPFFoundTargetData *ftd = (NPFFoundTargetData*)as->user_path;
00094 TileIndex from = current->tile;
00095 TileIndex to = fstd->dest_coords;
00096 uint dist;
00097
00098
00099 if (as->user_data[NPF_TYPE] == TRANSPORT_RAIL && fstd->station_index != INVALID_STATION)
00100 to = CalcClosestStationTile(fstd->station_index, from);
00101
00102 if (as->user_data[NPF_TYPE] == TRANSPORT_ROAD) {
00103
00104 dist = DistanceManhattan(from, to) * NPF_TILE_LENGTH;
00105 } else {
00106
00107 dist = NPFDistanceTrack(from, to);
00108 }
00109
00110 DEBUG(npf, 4, "Calculating H for: (%d, %d). Result: %d", TileX(current->tile), TileY(current->tile), dist);
00111
00112 if (dist < ftd->best_bird_dist) {
00113 ftd->best_bird_dist = dist;
00114 ftd->best_trackdir = (Trackdir)current->user_data[NPF_TRACKDIR_CHOICE];
00115 }
00116 return dist;
00117 }
00118
00119
00120
00121
00122
00123 static void NPFFillTrackdirChoice(AyStarNode *current, OpenListNode *parent)
00124 {
00125 if (parent->path.parent == NULL) {
00126 Trackdir trackdir = current->direction;
00127
00128
00129 current->user_data[NPF_TRACKDIR_CHOICE] = trackdir;
00130 DEBUG(npf, 6, "Saving trackdir: 0x%X", trackdir);
00131 } else {
00132
00133 current->user_data[NPF_TRACKDIR_CHOICE] = parent->path.node.user_data[NPF_TRACKDIR_CHOICE];
00134 }
00135 }
00136
00137
00138
00139
00140 static uint NPFTunnelCost(AyStarNode *current)
00141 {
00142 DiagDirection exitdir = TrackdirToExitdir(current->direction);
00143 TileIndex tile = current->tile;
00144 if (GetTunnelBridgeDirection(tile) == ReverseDiagDir(exitdir)) {
00145
00146
00147 return NPF_TILE_LENGTH * (GetTunnelBridgeLength(current->tile, GetOtherTunnelEnd(current->tile)) + 1);
00148
00149 } else {
00150
00151
00152 return NPF_TILE_LENGTH;
00153 }
00154 }
00155
00156 static inline uint NPFBridgeCost(AyStarNode *current)
00157 {
00158 return NPF_TILE_LENGTH * GetTunnelBridgeLength(current->tile, GetOtherBridgeEnd(current->tile));
00159 }
00160
00161 static uint NPFSlopeCost(AyStarNode *current)
00162 {
00163 TileIndex next = current->tile + TileOffsByDiagDir(TrackdirToExitdir(current->direction));
00164
00165
00166 int x1 = TileX(current->tile) * TILE_SIZE + TILE_SIZE / 2;
00167 int y1 = TileY(current->tile) * TILE_SIZE + TILE_SIZE / 2;
00168 int x2 = TileX(next) * TILE_SIZE + TILE_SIZE / 2;
00169 int y2 = TileY(next) * TILE_SIZE + TILE_SIZE / 2;
00170
00171 int dx4 = (x2 - x1) / 4;
00172 int dy4 = (y2 - y1) / 4;
00173
00174
00175
00176
00177 int z1 = GetSlopeZ(x1 + dx4, y1 + dy4);
00178 int z2 = GetSlopeZ(x2 - dx4, y2 - dy4);
00179
00180 if (z2 - z1 > 1) {
00181
00182 return _settings_game.pf.npf.npf_rail_slope_penalty;
00183 }
00184 return 0;
00185
00186
00187
00188 }
00189
00190 static uint NPFReservedTrackCost(AyStarNode *current)
00191 {
00192 TileIndex tile = current->tile;
00193 TrackBits track = TrackToTrackBits(TrackdirToTrack(current->direction));
00194 TrackBits res = GetReservedTrackbits(tile);
00195
00196 if (NPFGetFlag(current, NPF_FLAG_3RD_SIGNAL) || ((res & track) == TRACK_BIT_NONE && !TracksOverlap(res | track))) return 0;
00197
00198 if (IsTileType(tile, MP_TUNNELBRIDGE)) {
00199 DiagDirection exitdir = TrackdirToExitdir(current->direction);
00200 if (GetTunnelBridgeDirection(tile) == ReverseDiagDir(exitdir)) {
00201 return _settings_game.pf.npf.npf_rail_pbs_cross_penalty * (GetTunnelBridgeLength(tile, GetOtherTunnelBridgeEnd(tile)) + 1);
00202 }
00203 }
00204 return _settings_game.pf.npf.npf_rail_pbs_cross_penalty;
00205 }
00206
00211 static void NPFMarkTile(TileIndex tile)
00212 {
00213 #ifndef NO_DEBUG_MESSAGES
00214 if (_debug_npf_level < 1 || _networking) return;
00215 switch (GetTileType(tile)) {
00216 case MP_RAILWAY:
00217
00218 if (!IsRailDepot(tile)) {
00219 SetRailGroundType(tile, RAIL_GROUND_BARREN);
00220 MarkTileDirtyByTile(tile);
00221 }
00222 break;
00223
00224 case MP_ROAD:
00225 if (!IsRoadDepot(tile)) {
00226 SetRoadside(tile, ROADSIDE_BARREN);
00227 MarkTileDirtyByTile(tile);
00228 }
00229 break;
00230
00231 default:
00232 break;
00233 }
00234 #endif
00235 }
00236
00237 static int32 NPFWaterPathCost(AyStar *as, AyStarNode *current, OpenListNode *parent)
00238 {
00239
00240 int32 cost = 0;
00241 Trackdir trackdir = current->direction;
00242
00243 cost = _trackdir_length[trackdir];
00244
00245 if (IsBuoyTile(current->tile) && IsDiagonalTrackdir(trackdir))
00246 cost += _settings_game.pf.npf.npf_buoy_penalty;
00247
00248 if (current->direction != NextTrackdir((Trackdir)parent->path.node.direction))
00249 cost += _settings_game.pf.npf.npf_water_curve_penalty;
00250
00251
00252
00253 return cost;
00254 }
00255
00256
00257 static int32 NPFRoadPathCost(AyStar *as, AyStarNode *current, OpenListNode *parent)
00258 {
00259 TileIndex tile = current->tile;
00260 int32 cost = 0;
00261
00262
00263 switch (GetTileType(tile)) {
00264 case MP_TUNNELBRIDGE:
00265 cost = IsTunnel(tile) ? NPFTunnelCost(current) : NPFBridgeCost(current);
00266 break;
00267
00268 case MP_ROAD:
00269 cost = NPF_TILE_LENGTH;
00270
00271 if (IsLevelCrossing(tile)) cost += _settings_game.pf.npf.npf_crossing_penalty;
00272 break;
00273
00274 case MP_STATION:
00275 cost = NPF_TILE_LENGTH;
00276
00277 if (IsDriveThroughStopTile(tile)) cost += _settings_game.pf.npf.npf_road_drive_through_penalty;
00278 break;
00279
00280 default:
00281 break;
00282 }
00283
00284
00285
00286
00287 cost += NPFSlopeCost(current);
00288
00289
00290
00291 if (!IsDiagonalTrackdir(current->direction))
00292 cost += _settings_game.pf.npf.npf_road_curve_penalty;
00293
00294 NPFMarkTile(tile);
00295 DEBUG(npf, 4, "Calculating G for: (%d, %d). Result: %d", TileX(current->tile), TileY(current->tile), cost);
00296 return cost;
00297 }
00298
00299
00300
00301 static int32 NPFRailPathCost(AyStar *as, AyStarNode *current, OpenListNode *parent)
00302 {
00303 TileIndex tile = current->tile;
00304 Trackdir trackdir = current->direction;
00305 int32 cost = 0;
00306
00307 OpenListNode new_node;
00308
00309
00310 switch (GetTileType(tile)) {
00311 case MP_TUNNELBRIDGE:
00312 cost = IsTunnel(tile) ? NPFTunnelCost(current) : NPFBridgeCost(current);
00313 break;
00314
00315 case MP_RAILWAY:
00316 cost = _trackdir_length[trackdir];
00317 break;
00318
00319 case MP_ROAD:
00320 cost = NPF_TILE_LENGTH;
00321 break;
00322
00323 case MP_STATION:
00324
00325
00326
00327
00328
00329
00330 cost = NPF_TILE_LENGTH + _settings_game.pf.npf.npf_rail_station_penalty;
00331 break;
00332
00333 default:
00334 break;
00335 }
00336
00337
00338
00339
00340 if (IsTileType(tile, MP_RAILWAY)) {
00341 if (HasSignalOnTrackdir(tile, trackdir)) {
00342
00343 if (GetSignalStateByTrackdir(tile, trackdir) == SIGNAL_STATE_RED) {
00344
00345 if (!NPFGetFlag(current, NPF_FLAG_SEEN_SIGNAL)) {
00346
00347
00348
00349
00350 SignalType sigtype = GetSignalType(tile, TrackdirToTrack(trackdir));
00351 if (!IsPbsSignal(sigtype)) {
00352 if (sigtype == SIGTYPE_EXIT || sigtype == SIGTYPE_COMBO) {
00353
00354 cost += _settings_game.pf.npf.npf_rail_firstred_exit_penalty;
00355 } else {
00356 cost += _settings_game.pf.npf.npf_rail_firstred_penalty;
00357 }
00358 }
00359 }
00360
00361 NPFSetFlag(current, NPF_FLAG_LAST_SIGNAL_RED, true);
00362 } else {
00363
00364 NPFSetFlag(current, NPF_FLAG_LAST_SIGNAL_RED, false);
00365 }
00366 if (NPFGetFlag(current, NPF_FLAG_SEEN_SIGNAL)) {
00367 if (NPFGetFlag(current, NPF_FLAG_2ND_SIGNAL)) {
00368 NPFSetFlag(current, NPF_FLAG_3RD_SIGNAL, true);
00369 } else {
00370 NPFSetFlag(current, NPF_FLAG_2ND_SIGNAL, true);
00371 }
00372 } else {
00373 NPFSetFlag(current, NPF_FLAG_SEEN_SIGNAL, true);
00374 }
00375 }
00376
00377 if (HasPbsSignalOnTrackdir(tile, ReverseTrackdir(trackdir)) && !NPFGetFlag(current, NPF_FLAG_3RD_SIGNAL)) {
00378 cost += _settings_game.pf.npf.npf_rail_pbs_signal_back_penalty;
00379 }
00380 }
00381
00382
00383
00384
00385
00386 new_node.path.node = *current;
00387 if (as->EndNodeCheck(as, &new_node) == AYSTAR_FOUND_END_NODE && NPFGetFlag(current, NPF_FLAG_LAST_SIGNAL_RED))
00388 cost += _settings_game.pf.npf.npf_rail_lastred_penalty;
00389
00390
00391 cost += NPFSlopeCost(current);
00392
00393
00394 if (current->direction != NextTrackdir((Trackdir)parent->path.node.direction))
00395 cost += _settings_game.pf.npf.npf_rail_curve_penalty;
00396
00397
00398
00399
00400 if (IsRailDepotTile(tile) && as->EndNodeCheck(as, &new_node) != AYSTAR_FOUND_END_NODE) {
00401
00402
00403
00404 cost += _settings_game.pf.npf.npf_rail_depot_reverse_penalty;
00405 }
00406
00407
00408 cost += NPFReservedTrackCost(current);
00409
00410 NPFMarkTile(tile);
00411 DEBUG(npf, 4, "Calculating G for: (%d, %d). Result: %d", TileX(current->tile), TileY(current->tile), cost);
00412 return cost;
00413 }
00414
00415
00416 static int32 NPFFindDepot(AyStar *as, OpenListNode *current)
00417 {
00418
00419
00420 return IsDepotTypeTile(current->path.node.tile, (TransportType)as->user_data[NPF_TYPE]) ?
00421 AYSTAR_FOUND_END_NODE : AYSTAR_DONE;
00422 }
00423
00425 static int32 NPFFindSafeTile(AyStar *as, OpenListNode *current)
00426 {
00427 const Vehicle *v = ((NPFFindStationOrTileData*)as->user_target)->v;
00428
00429 return
00430 IsSafeWaitingPosition(v, current->path.node.tile, current->path.node.direction, true, _settings_game.pf.forbid_90_deg) &&
00431 IsWaitingPositionFree(v, current->path.node.tile, current->path.node.direction, _settings_game.pf.forbid_90_deg) ?
00432 AYSTAR_FOUND_END_NODE : AYSTAR_DONE;
00433 }
00434
00435
00436 static int32 NPFFindStationOrTile(AyStar *as, OpenListNode *current)
00437 {
00438 NPFFindStationOrTileData *fstd = (NPFFindStationOrTileData*)as->user_target;
00439 AyStarNode *node = ¤t->path.node;
00440 TileIndex tile = node->tile;
00441
00442
00443
00444 if (
00445 (fstd->station_index == INVALID_STATION && tile == fstd->dest_coords) ||
00446 (IsTileType(tile, MP_STATION) && GetStationIndex(tile) == fstd->station_index)
00447 ) {
00448 return AYSTAR_FOUND_END_NODE;
00449 } else {
00450 return AYSTAR_DONE;
00451 }
00452 }
00453
00461 static const PathNode *FindSafePosition(PathNode *path, const Vehicle *v)
00462 {
00463
00464 PathNode *sig = path;
00465
00466 for(; path->parent != NULL; path = path->parent) {
00467 if (IsSafeWaitingPosition(v, path->node.tile, path->node.direction, true, _settings_game.pf.forbid_90_deg)) {
00468 sig = path;
00469 }
00470 }
00471
00472 return sig;
00473 }
00474
00478 static void ClearPathReservation(const PathNode *start, const PathNode *end)
00479 {
00480 bool first_run = true;
00481 for (; start != end; start = start->parent) {
00482 if (IsRailwayStationTile(start->node.tile) && first_run) {
00483 SetRailwayStationPlatformReservation(start->node.tile, TrackdirToExitdir(start->node.direction), false);
00484 } else {
00485 UnreserveRailTrack(start->node.tile, TrackdirToTrack(start->node.direction));
00486 }
00487 first_run = false;
00488 }
00489 }
00490
00497 static void NPFSaveTargetData(AyStar *as, OpenListNode *current)
00498 {
00499 NPFFoundTargetData *ftd = (NPFFoundTargetData*)as->user_path;
00500 ftd->best_trackdir = (Trackdir)current->path.node.user_data[NPF_TRACKDIR_CHOICE];
00501 ftd->best_path_dist = current->g;
00502 ftd->best_bird_dist = 0;
00503 ftd->node = current->path.node;
00504 ftd->res_okay = false;
00505
00506 if (as->user_target != NULL && ((NPFFindStationOrTileData*)as->user_target)->reserve_path && as->user_data[NPF_TYPE] == TRANSPORT_RAIL) {
00507
00508 const Vehicle *v = ((NPFFindStationOrTileData*)as->user_target)->v;
00509
00510 const PathNode *target = FindSafePosition(¤t->path, v);
00511 ftd->node = target->node;
00512
00513
00514 if (IsRailwayStationTile(target->node.tile)) {
00515 DiagDirection dir = TrackdirToExitdir(target->node.direction);
00516 uint len = GetStationByTile(target->node.tile)->GetPlatformLength(target->node.tile, dir);
00517 TileIndex end_tile = TILE_ADD(target->node.tile, (len - 1) * TileOffsByDiagDir(dir));
00518
00519
00520 ftd->node.tile = end_tile;
00521 if (!IsWaitingPositionFree(v, end_tile, target->node.direction, _settings_game.pf.forbid_90_deg)) return;
00522 SetRailwayStationPlatformReservation(target->node.tile, dir, true);
00523 SetRailwayStationReservation(target->node.tile, false);
00524 } else {
00525 if (!IsWaitingPositionFree(v, target->node.tile, target->node.direction, _settings_game.pf.forbid_90_deg)) return;
00526 }
00527
00528 for (const PathNode *cur = target; cur->parent != NULL; cur = cur->parent) {
00529 if (!TryReserveRailTrack(cur->node.tile, TrackdirToTrack(cur->node.direction))) {
00530
00531 ClearPathReservation(target, cur);
00532 return;
00533 }
00534 }
00535
00536 ftd->res_okay = true;
00537 }
00538 }
00539
00549 static bool CanEnterTileOwnerCheck(Owner owner, TileIndex tile, DiagDirection enterdir)
00550 {
00551 if (IsTileType(tile, MP_RAILWAY) ||
00552 IsRailwayStationTile(tile) ||
00553 IsRoadDepotTile(tile) ||
00554 IsStandardRoadStopTile(tile)) {
00555 return IsTileOwner(tile, owner);
00556 }
00557
00558 switch (GetTileType(tile)) {
00559 case MP_ROAD:
00560
00561 if (IsLevelCrossing(tile) &&
00562 DiagDirToAxis(enterdir) != GetCrossingRoadAxis(tile)) {
00563 return IsTileOwner(tile, owner);
00564 }
00565 break;
00566
00567 case MP_TUNNELBRIDGE:
00568 if (GetTunnelBridgeTransportType(tile) == TRANSPORT_RAIL) {
00569 return IsTileOwner(tile, owner);
00570 }
00571 break;
00572
00573 default:
00574 break;
00575 }
00576
00577 return true;
00578 }
00579
00580
00584 static DiagDirection GetDepotDirection(TileIndex tile, TransportType type)
00585 {
00586 assert(IsDepotTypeTile(tile, type));
00587
00588 switch (type) {
00589 case TRANSPORT_RAIL: return GetRailDepotDirection(tile);
00590 case TRANSPORT_ROAD: return GetRoadDepotDirection(tile);
00591 case TRANSPORT_WATER: return GetShipDepotDirection(tile);
00592 default: return INVALID_DIAGDIR;
00593 }
00594 }
00595
00597 static DiagDirection GetSingleTramBit(TileIndex tile)
00598 {
00599 if (IsNormalRoadTile(tile)) {
00600 RoadBits rb = GetRoadBits(tile, ROADTYPE_TRAM);
00601 switch (rb) {
00602 case ROAD_NW: return DIAGDIR_NW;
00603 case ROAD_SW: return DIAGDIR_SW;
00604 case ROAD_SE: return DIAGDIR_SE;
00605 case ROAD_NE: return DIAGDIR_NE;
00606 default: break;
00607 }
00608 }
00609 return INVALID_DIAGDIR;
00610 }
00611
00622 static DiagDirection GetTileSingleEntry(TileIndex tile, TransportType type, uint subtype)
00623 {
00624 if (type != TRANSPORT_WATER && IsDepotTypeTile(tile, type)) return GetDepotDirection(tile, type);
00625
00626 if (type == TRANSPORT_ROAD) {
00627 if (IsStandardRoadStopTile(tile)) return GetRoadStopDir(tile);
00628 if (HasBit(subtype, ROADTYPE_TRAM)) return GetSingleTramBit(tile);
00629 }
00630
00631 return INVALID_DIAGDIR;
00632 }
00633
00643 static inline bool ForceReverse(TileIndex tile, DiagDirection dir, TransportType type, uint subtype)
00644 {
00645 DiagDirection single_entry = GetTileSingleEntry(tile, type, subtype);
00646 return single_entry != INVALID_DIAGDIR && single_entry != dir;
00647 }
00648
00660 static bool CanEnterTile(TileIndex tile, DiagDirection dir, TransportType type, uint subtype, RailTypes railtypes, Owner owner)
00661 {
00662
00663 if (IsTileType(tile, MP_TUNNELBRIDGE) && GetTunnelBridgeDirection(tile) != dir) return false;
00664
00665
00666 if (!CanEnterTileOwnerCheck(owner, tile, dir)) return false;
00667
00668
00669 if (type == TRANSPORT_RAIL) {
00670 RailType rail_type = GetTileRailType(tile);
00671 if (!HasBit(railtypes, rail_type)) return false;
00672 }
00673
00674
00675 DiagDirection single_entry = GetTileSingleEntry(tile, type, subtype);
00676 if (single_entry != INVALID_DIAGDIR && single_entry != ReverseDiagDir(dir)) return false;
00677
00678 return true;
00679 }
00680
00692 static TrackdirBits GetDriveableTrackdirBits(TileIndex dst_tile, Trackdir src_trackdir, TransportType type, uint subtype)
00693 {
00694 TrackdirBits trackdirbits = TrackStatusToTrackdirBits(GetTileTrackStatus(dst_tile, type, subtype));
00695
00696 if (trackdirbits == 0 && type == TRANSPORT_ROAD && HasBit(subtype, ROADTYPE_TRAM)) {
00697
00698
00699 switch (GetSingleTramBit(dst_tile)) {
00700 case DIAGDIR_NE:
00701 case DIAGDIR_SW:
00702 trackdirbits = TRACKDIR_BIT_X_NE | TRACKDIR_BIT_X_SW;
00703 break;
00704
00705 case DIAGDIR_NW:
00706 case DIAGDIR_SE:
00707 trackdirbits = TRACKDIR_BIT_Y_NW | TRACKDIR_BIT_Y_SE;
00708 break;
00709
00710 default: break;
00711 }
00712 }
00713
00714 DEBUG(npf, 4, "Next node: (%d, %d) [%d], possible trackdirs: 0x%X", TileX(dst_tile), TileY(dst_tile), dst_tile, trackdirbits);
00715
00716
00717 trackdirbits &= TrackdirReachesTrackdirs(src_trackdir);
00718
00719
00720 if (_settings_game.pf.forbid_90_deg && (type == TRANSPORT_RAIL || type == TRANSPORT_WATER)) trackdirbits &= ~TrackdirCrossesTrackdirs(src_trackdir);
00721
00722 DEBUG(npf, 6, "After filtering: (%d, %d), possible trackdirs: 0x%X", TileX(dst_tile), TileY(dst_tile), trackdirbits);
00723
00724 return trackdirbits;
00725 }
00726
00727
00728
00729
00730
00731
00732
00733
00734 static void NPFFollowTrack(AyStar *aystar, OpenListNode *current)
00735 {
00736
00737 Trackdir src_trackdir = current->path.node.direction;
00738 TileIndex src_tile = current->path.node.tile;
00739 DiagDirection src_exitdir = TrackdirToExitdir(src_trackdir);
00740
00741
00742
00743
00744 bool ignore_src_tile = (current->path.parent == NULL && NPFGetFlag(¤t->path.node, NPF_FLAG_IGNORE_START_TILE));
00745
00746
00747 TransportType type = (TransportType)aystar->user_data[NPF_TYPE];
00748 uint subtype = aystar->user_data[NPF_SUB_TYPE];
00749
00750
00751 aystar->num_neighbours = 0;
00752 DEBUG(npf, 4, "Expanding: (%d, %d, %d) [%d]", TileX(src_tile), TileY(src_tile), src_trackdir, src_tile);
00753
00754
00755 TileIndex dst_tile;
00756 TrackdirBits trackdirbits;
00757
00758
00759 if (ignore_src_tile) {
00760
00761 dst_tile = src_tile + TileOffsByDiagDir(src_exitdir);
00762 trackdirbits = GetDriveableTrackdirBits(dst_tile, src_trackdir, type, subtype);
00763 } else if (IsTileType(src_tile, MP_TUNNELBRIDGE) && GetTunnelBridgeDirection(src_tile) == src_exitdir) {
00764
00765 dst_tile = GetOtherTunnelBridgeEnd(src_tile);
00766 trackdirbits = TrackdirToTrackdirBits(src_trackdir);
00767 } else if (ForceReverse(src_tile, src_exitdir, type, subtype)) {
00768
00769 dst_tile = src_tile;
00770 src_trackdir = ReverseTrackdir(src_trackdir);
00771 trackdirbits = TrackdirToTrackdirBits(src_trackdir);
00772 } else {
00773
00774 dst_tile = AddTileIndexDiffCWrap(src_tile, TileIndexDiffCByDiagDir(src_exitdir));
00775
00776 if (dst_tile != INVALID_TILE && !CanEnterTile(dst_tile, src_exitdir, type, subtype, (RailTypes)aystar->user_data[NPF_RAILTYPES], (Owner)aystar->user_data[NPF_OWNER])) dst_tile = INVALID_TILE;
00777
00778 if (dst_tile == INVALID_TILE) {
00779
00780 if (type != TRANSPORT_ROAD || HasBit(subtype, ROADTYPE_TRAM)) return;
00781
00782 dst_tile = src_tile;
00783 src_trackdir = ReverseTrackdir(src_trackdir);
00784 }
00785
00786 trackdirbits = GetDriveableTrackdirBits(dst_tile, src_trackdir, type, subtype);
00787
00788 if (trackdirbits == 0) {
00789
00790 if (type != TRANSPORT_ROAD || HasBit(subtype, ROADTYPE_TRAM)) return;
00791
00792 dst_tile = src_tile;
00793 src_trackdir = ReverseTrackdir(src_trackdir);
00794
00795 trackdirbits = GetDriveableTrackdirBits(dst_tile, src_trackdir, type, subtype);
00796 }
00797 }
00798
00799 if (NPFGetFlag(¤t->path.node, NPF_FLAG_IGNORE_RESERVED)) {
00800
00801 TrackBits reserved = GetReservedTrackbits(dst_tile);
00802 trackdirbits &= ~TrackBitsToTrackdirBits(reserved);
00803
00804 uint bits = TrackdirBitsToTrackBits(trackdirbits);
00805 int i;
00806 FOR_EACH_SET_BIT(i, bits) {
00807 if (TracksOverlap(reserved | TrackToTrackBits((Track)i))) trackdirbits &= ~TrackToTrackdirBits((Track)i);
00808 }
00809 }
00810
00811
00812 uint i = 0;
00813 while (trackdirbits != 0) {
00814 Trackdir dst_trackdir = RemoveFirstTrackdir(&trackdirbits);
00815 DEBUG(npf, 5, "Expanded into trackdir: %d, remaining trackdirs: 0x%X", dst_trackdir, trackdirbits);
00816
00817
00818 if (IsTileType(dst_tile, MP_RAILWAY) && GetRailTileType(dst_tile) == RAIL_TILE_SIGNALS) {
00819 if (HasSignalOnTrackdir(dst_tile, ReverseTrackdir(dst_trackdir)) && !HasSignalOnTrackdir(dst_tile, dst_trackdir) && IsOnewaySignal(dst_tile, TrackdirToTrack(dst_trackdir)))
00820
00821 break;
00822 }
00823 {
00824
00825 AyStarNode *neighbour = &aystar->neighbours[i];
00826 neighbour->tile = dst_tile;
00827 neighbour->direction = dst_trackdir;
00828
00829 neighbour->user_data[NPF_NODE_FLAGS] = current->path.node.user_data[NPF_NODE_FLAGS];
00830 NPFFillTrackdirChoice(neighbour, current);
00831 }
00832 i++;
00833 }
00834 aystar->num_neighbours = i;
00835 }
00836
00837
00838
00839
00840
00841
00842
00843
00844
00845
00846
00847 static NPFFoundTargetData NPFRouteInternal(AyStarNode *start1, bool ignore_start_tile1, AyStarNode *start2, bool ignore_start_tile2, NPFFindStationOrTileData *target, AyStar_EndNodeCheck target_proc, AyStar_CalculateH heuristic_proc, TransportType type, uint sub_type, Owner owner, RailTypes railtypes, uint reverse_penalty)
00848 {
00849 int r;
00850 NPFFoundTargetData result;
00851
00852
00853 _npf_aystar.CalculateH = heuristic_proc;
00854 _npf_aystar.EndNodeCheck = target_proc;
00855 _npf_aystar.FoundEndNode = NPFSaveTargetData;
00856 _npf_aystar.GetNeighbours = NPFFollowTrack;
00857 switch (type) {
00858 default: NOT_REACHED();
00859 case TRANSPORT_RAIL: _npf_aystar.CalculateG = NPFRailPathCost; break;
00860 case TRANSPORT_ROAD: _npf_aystar.CalculateG = NPFRoadPathCost; break;
00861 case TRANSPORT_WATER: _npf_aystar.CalculateG = NPFWaterPathCost; break;
00862 }
00863
00864
00865 start1->user_data[NPF_TRACKDIR_CHOICE] = INVALID_TRACKDIR;
00866 start1->user_data[NPF_NODE_FLAGS] = 0;
00867 NPFSetFlag(start1, NPF_FLAG_IGNORE_START_TILE, ignore_start_tile1);
00868 _npf_aystar.addstart(&_npf_aystar, start1, 0);
00869 if (start2) {
00870 start2->user_data[NPF_TRACKDIR_CHOICE] = INVALID_TRACKDIR;
00871 start2->user_data[NPF_NODE_FLAGS] = 0;
00872 NPFSetFlag(start2, NPF_FLAG_IGNORE_START_TILE, ignore_start_tile2);
00873 NPFSetFlag(start2, NPF_FLAG_REVERSE, true);
00874 _npf_aystar.addstart(&_npf_aystar, start2, reverse_penalty);
00875 }
00876
00877
00878 result.best_bird_dist = UINT_MAX;
00879 result.best_path_dist = UINT_MAX;
00880 result.best_trackdir = INVALID_TRACKDIR;
00881 result.node.tile = INVALID_TILE;
00882 result.res_okay = false;
00883 _npf_aystar.user_path = &result;
00884
00885
00886 _npf_aystar.user_target = target;
00887
00888
00889 _npf_aystar.user_data[NPF_TYPE] = type;
00890 _npf_aystar.user_data[NPF_SUB_TYPE] = sub_type;
00891 _npf_aystar.user_data[NPF_OWNER] = owner;
00892 _npf_aystar.user_data[NPF_RAILTYPES] = railtypes;
00893
00894
00895 r = AyStarMain_Main(&_npf_aystar);
00896 assert(r != AYSTAR_STILL_BUSY);
00897
00898 if (result.best_bird_dist != 0) {
00899 if (target != NULL) {
00900 DEBUG(npf, 1, "Could not find route to tile 0x%X from 0x%X.", target->dest_coords, start1->tile);
00901 } else {
00902
00903 DEBUG(npf, 1, "Could not find route to a depot from tile 0x%X.", start1->tile);
00904 }
00905
00906 }
00907 return result;
00908 }
00909
00910 NPFFoundTargetData NPFRouteToStationOrTileTwoWay(TileIndex tile1, Trackdir trackdir1, bool ignore_start_tile1, TileIndex tile2, Trackdir trackdir2, bool ignore_start_tile2, NPFFindStationOrTileData *target, TransportType type, uint sub_type, Owner owner, RailTypes railtypes)
00911 {
00912 AyStarNode start1;
00913 AyStarNode start2;
00914
00915 start1.tile = tile1;
00916 start2.tile = tile2;
00917
00918
00919 start1.user_data[NPF_TRACKDIR_CHOICE] = INVALID_TRACKDIR;
00920 start1.direction = trackdir1;
00921 start2.direction = trackdir2;
00922 start2.user_data[NPF_TRACKDIR_CHOICE] = INVALID_TRACKDIR;
00923
00924 return NPFRouteInternal(&start1, ignore_start_tile1, (IsValidTile(tile2) ? &start2 : NULL), ignore_start_tile2, target, NPFFindStationOrTile, NPFCalcStationOrTileHeuristic, type, sub_type, owner, railtypes, 0);
00925 }
00926
00927 NPFFoundTargetData NPFRouteToStationOrTile(TileIndex tile, Trackdir trackdir, bool ignore_start_tile, NPFFindStationOrTileData *target, TransportType type, uint sub_type, Owner owner, RailTypes railtypes)
00928 {
00929 return NPFRouteToStationOrTileTwoWay(tile, trackdir, ignore_start_tile, INVALID_TILE, INVALID_TRACKDIR, false, target, type, sub_type, owner, railtypes);
00930 }
00931
00932 NPFFoundTargetData NPFRouteToDepotBreadthFirstTwoWay(TileIndex tile1, Trackdir trackdir1, bool ignore_start_tile1, TileIndex tile2, Trackdir trackdir2, bool ignore_start_tile2, TransportType type, uint sub_type, Owner owner, RailTypes railtypes, uint reverse_penalty)
00933 {
00934 AyStarNode start1;
00935 AyStarNode start2;
00936
00937 start1.tile = tile1;
00938 start2.tile = tile2;
00939
00940
00941 start1.user_data[NPF_TRACKDIR_CHOICE] = INVALID_TRACKDIR;
00942 start1.direction = trackdir1;
00943 start2.direction = trackdir2;
00944 start2.user_data[NPF_TRACKDIR_CHOICE] = INVALID_TRACKDIR;
00945
00946
00947
00948 return NPFRouteInternal(&start1, ignore_start_tile1, (IsValidTile(tile2) ? &start2 : NULL), ignore_start_tile2, NULL, NPFFindDepot, NPFCalcZero, type, sub_type, owner, railtypes, reverse_penalty);
00949 }
00950
00951 NPFFoundTargetData NPFRouteToDepotBreadthFirst(TileIndex tile, Trackdir trackdir, bool ignore_start_tile, TransportType type, uint sub_type, Owner owner, RailTypes railtypes)
00952 {
00953 return NPFRouteToDepotBreadthFirstTwoWay(tile, trackdir, ignore_start_tile, INVALID_TILE, INVALID_TRACKDIR, false, type, sub_type, owner, railtypes, 0);
00954 }
00955
00956 NPFFoundTargetData NPFRouteToDepotTrialError(TileIndex tile, Trackdir trackdir, bool ignore_start_tile, TransportType type, uint sub_type, Owner owner, RailTypes railtypes)
00957 {
00958
00959
00960
00961
00962
00963
00964
00965
00966 Queue depots;
00967 int r;
00968 NPFFoundTargetData best_result = {UINT_MAX, UINT_MAX, INVALID_TRACKDIR, {INVALID_TILE, INVALID_TRACKDIR, {0, 0}}, false};
00969 NPFFoundTargetData result;
00970 NPFFindStationOrTileData target;
00971 AyStarNode start;
00972 Depot *current;
00973 Depot *depot;
00974
00975 init_InsSort(&depots);
00976
00977 FOR_ALL_DEPOTS(depot) {
00978
00979
00980 if (IsDepotTypeTile(depot->xy, type) && IsTileOwner(depot->xy, owner))
00981
00982 depots.push(&depots, depot, DistanceManhattan(tile, depot->xy));
00983 }
00984
00985
00986
00987
00988 _npf_aystar.CalculateH = NPFCalcStationOrTileHeuristic;
00989 _npf_aystar.EndNodeCheck = NPFFindStationOrTile;
00990 _npf_aystar.FoundEndNode = NPFSaveTargetData;
00991 _npf_aystar.GetNeighbours = NPFFollowTrack;
00992 switch (type) {
00993 default: NOT_REACHED();
00994 case TRANSPORT_RAIL: _npf_aystar.CalculateG = NPFRailPathCost; break;
00995 case TRANSPORT_ROAD: _npf_aystar.CalculateG = NPFRoadPathCost; break;
00996 case TRANSPORT_WATER: _npf_aystar.CalculateG = NPFWaterPathCost; break;
00997 }
00998
00999
01000 target.station_index = INVALID_STATION;
01001 _npf_aystar.user_target = ⌖
01002
01003
01004 _npf_aystar.user_data[NPF_TYPE] = type;
01005 _npf_aystar.user_data[NPF_SUB_TYPE] = sub_type;
01006 _npf_aystar.user_data[NPF_OWNER] = owner;
01007
01008
01009 start.tile = tile;
01010 start.direction = trackdir;
01011
01012
01013 _npf_aystar.user_path = &result;
01014 best_result.best_path_dist = UINT_MAX;
01015 best_result.best_bird_dist = UINT_MAX;
01016
01017
01018 while ((current = (Depot*)depots.pop(&depots))) {
01019
01020
01021
01022
01023 if ( DistanceManhattan(tile, current->xy * NPF_TILE_LENGTH) > best_result.best_path_dist)
01024 break;
01025
01026
01027
01028
01029 start.user_data[NPF_TRACKDIR_CHOICE] = INVALID_TRACKDIR;
01030 start.user_data[NPF_NODE_FLAGS] = 0;
01031 NPFSetFlag(&start, NPF_FLAG_IGNORE_START_TILE, ignore_start_tile);
01032 _npf_aystar.addstart(&_npf_aystar, &start, 0);
01033
01034
01035 result.best_bird_dist = UINT_MAX;
01036 result.best_path_dist = UINT_MAX;
01037 result.best_trackdir = INVALID_TRACKDIR;
01038
01039
01040 target.dest_coords = current->xy;
01041
01042
01043 r = AyStarMain_Main(&_npf_aystar);
01044 assert(r != AYSTAR_STILL_BUSY);
01045
01046
01047 if (result.best_path_dist < best_result.best_path_dist)
01048 best_result = result;
01049 }
01050 if (result.best_bird_dist != 0) {
01051 DEBUG(npf, 1, "Could not find route to any depot from tile 0x%X.", tile);
01052 }
01053 return best_result;
01054 }
01055
01056 NPFFoundTargetData NPFRouteToSafeTile(const Vehicle *v, TileIndex tile, Trackdir trackdir, bool override_railtype)
01057 {
01058 assert(v->type == VEH_TRAIN);
01059
01060 NPFFindStationOrTileData fstd;
01061 fstd.v = v;
01062 fstd.reserve_path = true;
01063
01064 AyStarNode start1;
01065 start1.tile = tile;
01066
01067
01068 start1.user_data[NPF_TRACKDIR_CHOICE] = INVALID_TRACKDIR;
01069 start1.direction = trackdir;
01070 NPFSetFlag(&start1, NPF_FLAG_IGNORE_RESERVED, true);
01071
01072 RailTypes railtypes = v->u.rail.compatible_railtypes;
01073 if (override_railtype) railtypes |= GetRailTypeInfo(v->u.rail.railtype)->compatible_railtypes;
01074
01075
01076
01077 return NPFRouteInternal(&start1, true, NULL, false, &fstd, NPFFindSafeTile, NPFCalcZero, TRANSPORT_RAIL, 0, v->owner, railtypes, 0);
01078 }
01079
01080 void InitializeNPF()
01081 {
01082 static bool first_init = true;
01083 if (first_init) {
01084 first_init = false;
01085 init_AyStar(&_npf_aystar, NPFHash, NPF_HASH_SIZE);
01086 } else {
01087 AyStarMain_Clear(&_npf_aystar);
01088 }
01089 _npf_aystar.loops_per_tick = 0;
01090 _npf_aystar.max_path_cost = 0;
01091
01092
01093
01094 _npf_aystar.max_search_nodes = _settings_game.pf.npf.npf_max_search_nodes;
01095 }
01096
01097 void NPFFillWithOrderData(NPFFindStationOrTileData *fstd, Vehicle *v, bool reserve_path)
01098 {
01099
01100
01101
01102
01103
01104
01105 if (v->current_order.IsType(OT_GOTO_STATION) && v->type == VEH_TRAIN) {
01106 fstd->station_index = v->current_order.GetDestination();
01107
01108 fstd->dest_coords = CalcClosestStationTile(fstd->station_index, v->tile);
01109 } else {
01110 fstd->dest_coords = v->dest_tile;
01111 fstd->station_index = INVALID_STATION;
01112 }
01113 fstd->reserve_path = reserve_path;
01114 fstd->v = v;
01115 }