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
00019 static AyStar _npf_aystar;
00020
00021
00022
00023
00024 #define NPF_STRAIGHT_LENGTH (uint)(NPF_TILE_LENGTH * STRAIGHT_TRACK_LENGTH)
00025 static const uint _trackdir_length[TRACKDIR_END] = {
00026 NPF_TILE_LENGTH, NPF_TILE_LENGTH, NPF_STRAIGHT_LENGTH, NPF_STRAIGHT_LENGTH, NPF_STRAIGHT_LENGTH, NPF_STRAIGHT_LENGTH,
00027 0, 0,
00028 NPF_TILE_LENGTH, NPF_TILE_LENGTH, NPF_STRAIGHT_LENGTH, NPF_STRAIGHT_LENGTH, NPF_STRAIGHT_LENGTH, NPF_STRAIGHT_LENGTH
00029 };
00030
00037 static uint NPFDistanceTrack(TileIndex t0, TileIndex t1)
00038 {
00039 const uint dx = Delta(TileX(t0), TileX(t1));
00040 const uint dy = Delta(TileY(t0), TileY(t1));
00041
00042 const uint straightTracks = 2 * min(dx, dy);
00043
00044
00045
00046
00047 const uint diagTracks = dx + dy - straightTracks;
00048
00049
00050
00051 return diagTracks * NPF_TILE_LENGTH + straightTracks * NPF_TILE_LENGTH * STRAIGHT_TRACK_LENGTH;
00052 }
00053
00054
00055 #if 0
00056 static uint NTPHash(uint key1, uint key2)
00057 {
00058
00059 return PATHFIND_HASH_TILE(key1);
00060 }
00061 #endif
00062
00070 static uint NPFHash(uint key1, uint key2)
00071 {
00072
00073 uint part1 = TileX(key1) & NPF_HASH_HALFMASK;
00074 uint part2 = TileY(key1) & NPF_HASH_HALFMASK;
00075
00076 assert(IsValidTrackdir((Trackdir)key2));
00077 assert(IsValidTile(key1));
00078 return ((part1 << NPF_HASH_HALFBITS | part2) + (NPF_HASH_SIZE * key2 / TRACKDIR_END)) % NPF_HASH_SIZE;
00079 }
00080
00081 static int32 NPFCalcZero(AyStar *as, AyStarNode *current, OpenListNode *parent)
00082 {
00083 return 0;
00084 }
00085
00086
00087
00088
00089
00090 static TileIndex CalcClosestStationTile(StationID station, TileIndex tile)
00091 {
00092 const Station *st = GetStation(station);
00093
00094
00095 if (!IsValidTile(st->train_tile)) return st->xy;
00096
00097 uint minx = TileX(st->train_tile);
00098 uint miny = TileY(st->train_tile);
00099 uint maxx = minx + st->trainst_w - 1;
00100 uint maxy = miny + st->trainst_h - 1;
00101 uint x;
00102 uint y;
00103
00104
00105
00106 x = Clamp(TileX(tile), minx, maxx);
00107
00108
00109 y = Clamp(TileY(tile), miny, maxy);
00110
00111
00112 return TileXY(x, y);
00113 }
00114
00115
00116
00117
00118 static int32 NPFCalcStationOrTileHeuristic(AyStar *as, AyStarNode *current, OpenListNode *parent)
00119 {
00120 NPFFindStationOrTileData *fstd = (NPFFindStationOrTileData*)as->user_target;
00121 NPFFoundTargetData *ftd = (NPFFoundTargetData*)as->user_path;
00122 TileIndex from = current->tile;
00123 TileIndex to = fstd->dest_coords;
00124 uint dist;
00125
00126
00127 if (as->user_data[NPF_TYPE] == TRANSPORT_RAIL && fstd->station_index != INVALID_STATION)
00128 to = CalcClosestStationTile(fstd->station_index, from);
00129
00130 if (as->user_data[NPF_TYPE] == TRANSPORT_ROAD) {
00131
00132 dist = DistanceManhattan(from, to) * NPF_TILE_LENGTH;
00133 } else {
00134
00135 dist = NPFDistanceTrack(from, to);
00136 }
00137
00138 DEBUG(npf, 4, "Calculating H for: (%d, %d). Result: %d", TileX(current->tile), TileY(current->tile), dist);
00139
00140 if (dist < ftd->best_bird_dist) {
00141 ftd->best_bird_dist = dist;
00142 ftd->best_trackdir = (Trackdir)current->user_data[NPF_TRACKDIR_CHOICE];
00143 }
00144 return dist;
00145 }
00146
00147
00148
00149
00150
00151 static void NPFFillTrackdirChoice(AyStarNode *current, OpenListNode *parent)
00152 {
00153 if (parent->path.parent == NULL) {
00154 Trackdir trackdir = current->direction;
00155
00156
00157 current->user_data[NPF_TRACKDIR_CHOICE] = trackdir;
00158 DEBUG(npf, 6, "Saving trackdir: 0x%X", trackdir);
00159 } else {
00160
00161 current->user_data[NPF_TRACKDIR_CHOICE] = parent->path.node.user_data[NPF_TRACKDIR_CHOICE];
00162 }
00163 }
00164
00165
00166
00167
00168 static uint NPFTunnelCost(AyStarNode *current)
00169 {
00170 DiagDirection exitdir = TrackdirToExitdir(current->direction);
00171 TileIndex tile = current->tile;
00172 if (GetTunnelBridgeDirection(tile) == ReverseDiagDir(exitdir)) {
00173
00174
00175 return NPF_TILE_LENGTH * (GetTunnelBridgeLength(current->tile, GetOtherTunnelEnd(current->tile)) + 1);
00176
00177 } else {
00178
00179
00180 return NPF_TILE_LENGTH;
00181 }
00182 }
00183
00184 static inline uint NPFBridgeCost(AyStarNode *current)
00185 {
00186 return NPF_TILE_LENGTH * GetTunnelBridgeLength(current->tile, GetOtherBridgeEnd(current->tile));
00187 }
00188
00189 static uint NPFSlopeCost(AyStarNode *current)
00190 {
00191 TileIndex next = current->tile + TileOffsByDiagDir(TrackdirToExitdir(current->direction));
00192
00193
00194 int x1 = TileX(current->tile) * TILE_SIZE + TILE_SIZE / 2;
00195 int y1 = TileY(current->tile) * TILE_SIZE + TILE_SIZE / 2;
00196 int x2 = TileX(next) * TILE_SIZE + TILE_SIZE / 2;
00197 int y2 = TileY(next) * TILE_SIZE + TILE_SIZE / 2;
00198
00199 int dx4 = (x2 - x1) / 4;
00200 int dy4 = (y2 - y1) / 4;
00201
00202
00203
00204
00205 int z1 = GetSlopeZ(x1 + dx4, y1 + dy4);
00206 int z2 = GetSlopeZ(x2 - dx4, y2 - dy4);
00207
00208 if (z2 - z1 > 1) {
00209
00210 return _settings_game.pf.npf.npf_rail_slope_penalty;
00211 }
00212 return 0;
00213
00214
00215
00216 }
00217
00218 static uint NPFReservedTrackCost(AyStarNode *current)
00219 {
00220 TileIndex tile = current->tile;
00221 TrackBits track = TrackToTrackBits(TrackdirToTrack(current->direction));
00222 TrackBits res = GetReservedTrackbits(tile);
00223
00224 if (NPFGetFlag(current, NPF_FLAG_3RD_SIGNAL) || ((res & track) == TRACK_BIT_NONE && !TracksOverlap(res | track))) return 0;
00225
00226 if (IsTileType(tile, MP_TUNNELBRIDGE)) {
00227 DiagDirection exitdir = TrackdirToExitdir(current->direction);
00228 if (GetTunnelBridgeDirection(tile) == ReverseDiagDir(exitdir)) {
00229 return _settings_game.pf.npf.npf_rail_pbs_cross_penalty * (GetTunnelBridgeLength(tile, GetOtherTunnelBridgeEnd(tile)) + 1);
00230 }
00231 }
00232 return _settings_game.pf.npf.npf_rail_pbs_cross_penalty;
00233 }
00234
00239 static void NPFMarkTile(TileIndex tile)
00240 {
00241 #ifndef NO_DEBUG_MESSAGES
00242 if (_debug_npf_level < 1 || _networking) return;
00243 switch (GetTileType(tile)) {
00244 case MP_RAILWAY:
00245
00246 if (!IsRailDepot(tile)) {
00247 SetRailGroundType(tile, RAIL_GROUND_BARREN);
00248 MarkTileDirtyByTile(tile);
00249 }
00250 break;
00251
00252 case MP_ROAD:
00253 if (!IsRoadDepot(tile)) {
00254 SetRoadside(tile, ROADSIDE_BARREN);
00255 MarkTileDirtyByTile(tile);
00256 }
00257 break;
00258
00259 default:
00260 break;
00261 }
00262 #endif
00263 }
00264
00265 static int32 NPFWaterPathCost(AyStar *as, AyStarNode *current, OpenListNode *parent)
00266 {
00267
00268 int32 cost = 0;
00269 Trackdir trackdir = current->direction;
00270
00271 cost = _trackdir_length[trackdir];
00272
00273 if (IsBuoyTile(current->tile) && IsDiagonalTrackdir(trackdir))
00274 cost += _settings_game.pf.npf.npf_buoy_penalty;
00275
00276 if (current->direction != NextTrackdir((Trackdir)parent->path.node.direction))
00277 cost += _settings_game.pf.npf.npf_water_curve_penalty;
00278
00279
00280
00281 return cost;
00282 }
00283
00284
00285 static int32 NPFRoadPathCost(AyStar *as, AyStarNode *current, OpenListNode *parent)
00286 {
00287 TileIndex tile = current->tile;
00288 int32 cost = 0;
00289
00290
00291 switch (GetTileType(tile)) {
00292 case MP_TUNNELBRIDGE:
00293 cost = IsTunnel(tile) ? NPFTunnelCost(current) : NPFBridgeCost(current);
00294 break;
00295
00296 case MP_ROAD:
00297 cost = NPF_TILE_LENGTH;
00298
00299 if (IsLevelCrossing(tile)) cost += _settings_game.pf.npf.npf_crossing_penalty;
00300 break;
00301
00302 case MP_STATION:
00303 cost = NPF_TILE_LENGTH;
00304
00305 if (IsDriveThroughStopTile(tile)) cost += _settings_game.pf.npf.npf_road_drive_through_penalty;
00306 break;
00307
00308 default:
00309 break;
00310 }
00311
00312
00313
00314
00315 cost += NPFSlopeCost(current);
00316
00317
00318
00319 if (!IsDiagonalTrackdir(current->direction))
00320 cost += _settings_game.pf.npf.npf_road_curve_penalty;
00321
00322 NPFMarkTile(tile);
00323 DEBUG(npf, 4, "Calculating G for: (%d, %d). Result: %d", TileX(current->tile), TileY(current->tile), cost);
00324 return cost;
00325 }
00326
00327
00328
00329 static int32 NPFRailPathCost(AyStar *as, AyStarNode *current, OpenListNode *parent)
00330 {
00331 TileIndex tile = current->tile;
00332 Trackdir trackdir = current->direction;
00333 int32 cost = 0;
00334
00335 OpenListNode new_node;
00336
00337
00338 switch (GetTileType(tile)) {
00339 case MP_TUNNELBRIDGE:
00340 cost = IsTunnel(tile) ? NPFTunnelCost(current) : NPFBridgeCost(current);
00341 break;
00342
00343 case MP_RAILWAY:
00344 cost = _trackdir_length[trackdir];
00345 break;
00346
00347 case MP_ROAD:
00348 cost = NPF_TILE_LENGTH;
00349 break;
00350
00351 case MP_STATION:
00352
00353
00354
00355
00356
00357
00358 cost = NPF_TILE_LENGTH + _settings_game.pf.npf.npf_rail_station_penalty;
00359 break;
00360
00361 default:
00362 break;
00363 }
00364
00365
00366
00367
00368 if (IsTileType(tile, MP_RAILWAY)) {
00369 if (HasSignalOnTrackdir(tile, trackdir)) {
00370
00371 if (GetSignalStateByTrackdir(tile, trackdir) == SIGNAL_STATE_RED) {
00372
00373 if (!NPFGetFlag(current, NPF_FLAG_SEEN_SIGNAL)) {
00374
00375
00376
00377
00378 SignalType sigtype = GetSignalType(tile, TrackdirToTrack(trackdir));
00379 if (!IsPbsSignal(sigtype)) {
00380 if (sigtype == SIGTYPE_EXIT || sigtype == SIGTYPE_COMBO) {
00381
00382 cost += _settings_game.pf.npf.npf_rail_firstred_exit_penalty;
00383 } else {
00384 cost += _settings_game.pf.npf.npf_rail_firstred_penalty;
00385 }
00386 }
00387 }
00388
00389 NPFSetFlag(current, NPF_FLAG_LAST_SIGNAL_RED, true);
00390 } else {
00391
00392 NPFSetFlag(current, NPF_FLAG_LAST_SIGNAL_RED, false);
00393 }
00394 if (NPFGetFlag(current, NPF_FLAG_SEEN_SIGNAL)) {
00395 if (NPFGetFlag(current, NPF_FLAG_2ND_SIGNAL)) {
00396 NPFSetFlag(current, NPF_FLAG_3RD_SIGNAL, true);
00397 } else {
00398 NPFSetFlag(current, NPF_FLAG_2ND_SIGNAL, true);
00399 }
00400 } else {
00401 NPFSetFlag(current, NPF_FLAG_SEEN_SIGNAL, true);
00402 }
00403 }
00404
00405 if (HasPbsSignalOnTrackdir(tile, ReverseTrackdir(trackdir)) && !NPFGetFlag(current, NPF_FLAG_3RD_SIGNAL)) {
00406 cost += _settings_game.pf.npf.npf_rail_pbs_signal_back_penalty;
00407 }
00408 }
00409
00410
00411
00412
00413
00414 new_node.path.node = *current;
00415 if (as->EndNodeCheck(as, &new_node) == AYSTAR_FOUND_END_NODE && NPFGetFlag(current, NPF_FLAG_LAST_SIGNAL_RED))
00416 cost += _settings_game.pf.npf.npf_rail_lastred_penalty;
00417
00418
00419 cost += NPFSlopeCost(current);
00420
00421
00422 if (current->direction != NextTrackdir((Trackdir)parent->path.node.direction))
00423 cost += _settings_game.pf.npf.npf_rail_curve_penalty;
00424
00425
00426
00427
00428 if (IsRailDepotTile(tile) && as->EndNodeCheck(as, &new_node) != AYSTAR_FOUND_END_NODE) {
00429
00430
00431
00432 cost += _settings_game.pf.npf.npf_rail_depot_reverse_penalty;
00433 }
00434
00435
00436 cost += NPFReservedTrackCost(current);
00437
00438 NPFMarkTile(tile);
00439 DEBUG(npf, 4, "Calculating G for: (%d, %d). Result: %d", TileX(current->tile), TileY(current->tile), cost);
00440 return cost;
00441 }
00442
00443
00444 static int32 NPFFindDepot(AyStar *as, OpenListNode *current)
00445 {
00446
00447
00448 return IsDepotTypeTile(current->path.node.tile, (TransportType)as->user_data[NPF_TYPE]) ?
00449 AYSTAR_FOUND_END_NODE : AYSTAR_DONE;
00450 }
00451
00453 static int32 NPFFindSafeTile(AyStar *as, OpenListNode *current)
00454 {
00455 const Vehicle *v = ((NPFFindStationOrTileData*)as->user_target)->v;
00456
00457 return
00458 IsSafeWaitingPosition(v, current->path.node.tile, current->path.node.direction, true, _settings_game.pf.forbid_90_deg) &&
00459 IsWaitingPositionFree(v, current->path.node.tile, current->path.node.direction, _settings_game.pf.forbid_90_deg) ?
00460 AYSTAR_FOUND_END_NODE : AYSTAR_DONE;
00461 }
00462
00463
00464 static int32 NPFFindStationOrTile(AyStar *as, OpenListNode *current)
00465 {
00466 NPFFindStationOrTileData *fstd = (NPFFindStationOrTileData*)as->user_target;
00467 AyStarNode *node = ¤t->path.node;
00468 TileIndex tile = node->tile;
00469
00470
00471
00472 if (
00473 (fstd->station_index == INVALID_STATION && tile == fstd->dest_coords) ||
00474 (IsTileType(tile, MP_STATION) && GetStationIndex(tile) == fstd->station_index)
00475 ) {
00476 return AYSTAR_FOUND_END_NODE;
00477 } else {
00478 return AYSTAR_DONE;
00479 }
00480 }
00481
00489 static const PathNode *FindSafePosition(PathNode *path, const Vehicle *v)
00490 {
00491
00492 PathNode *sig = path;
00493
00494 for(; path->parent != NULL; path = path->parent) {
00495 if (IsSafeWaitingPosition(v, path->node.tile, path->node.direction, true, _settings_game.pf.forbid_90_deg)) {
00496 sig = path;
00497 }
00498 }
00499
00500 return sig;
00501 }
00502
00506 static void ClearPathReservation(const PathNode *start, const PathNode *end)
00507 {
00508 bool first_run = true;
00509 for (; start != end; start = start->parent) {
00510 if (IsRailwayStationTile(start->node.tile) && first_run) {
00511 SetRailwayStationPlatformReservation(start->node.tile, TrackdirToExitdir(start->node.direction), false);
00512 } else {
00513 UnreserveRailTrack(start->node.tile, TrackdirToTrack(start->node.direction));
00514 }
00515 first_run = false;
00516 }
00517 }
00518
00525 static void NPFSaveTargetData(AyStar *as, OpenListNode *current)
00526 {
00527 NPFFoundTargetData *ftd = (NPFFoundTargetData*)as->user_path;
00528 ftd->best_trackdir = (Trackdir)current->path.node.user_data[NPF_TRACKDIR_CHOICE];
00529 ftd->best_path_dist = current->g;
00530 ftd->best_bird_dist = 0;
00531 ftd->node = current->path.node;
00532 ftd->res_okay = false;
00533
00534 if (as->user_target != NULL && ((NPFFindStationOrTileData*)as->user_target)->reserve_path && as->user_data[NPF_TYPE] == TRANSPORT_RAIL) {
00535
00536 const Vehicle *v = ((NPFFindStationOrTileData*)as->user_target)->v;
00537
00538 const PathNode *target = FindSafePosition(¤t->path, v);
00539 ftd->node = target->node;
00540
00541
00542 if (IsRailwayStationTile(target->node.tile)) {
00543 DiagDirection dir = TrackdirToExitdir(target->node.direction);
00544 uint len = GetStationByTile(target->node.tile)->GetPlatformLength(target->node.tile, dir);
00545 TileIndex end_tile = TILE_ADD(target->node.tile, (len - 1) * TileOffsByDiagDir(dir));
00546
00547
00548 ftd->node.tile = end_tile;
00549 if (!IsWaitingPositionFree(v, end_tile, target->node.direction, _settings_game.pf.forbid_90_deg)) return;
00550 SetRailwayStationPlatformReservation(target->node.tile, dir, true);
00551 SetRailwayStationReservation(target->node.tile, false);
00552 } else {
00553 if (!IsWaitingPositionFree(v, target->node.tile, target->node.direction, _settings_game.pf.forbid_90_deg)) return;
00554 }
00555
00556 for (const PathNode *cur = target; cur->parent != NULL; cur = cur->parent) {
00557 if (!TryReserveRailTrack(cur->node.tile, TrackdirToTrack(cur->node.direction))) {
00558
00559 ClearPathReservation(target, cur);
00560 return;
00561 }
00562 }
00563
00564 ftd->res_okay = true;
00565 }
00566 }
00567
00577 static bool CanEnterTileOwnerCheck(Owner owner, TileIndex tile, DiagDirection enterdir)
00578 {
00579 if (IsTileType(tile, MP_RAILWAY) ||
00580 IsRailwayStationTile(tile) ||
00581 IsRoadDepotTile(tile) ||
00582 IsStandardRoadStopTile(tile)) {
00583 return IsTileOwner(tile, owner);
00584 }
00585
00586 switch (GetTileType(tile)) {
00587 case MP_ROAD:
00588
00589 if (IsLevelCrossing(tile) &&
00590 DiagDirToAxis(enterdir) != GetCrossingRoadAxis(tile)) {
00591 return IsTileOwner(tile, owner);
00592 }
00593 break;
00594
00595 case MP_TUNNELBRIDGE:
00596 if (GetTunnelBridgeTransportType(tile) == TRANSPORT_RAIL) {
00597 return IsTileOwner(tile, owner);
00598 }
00599 break;
00600
00601 default:
00602 break;
00603 }
00604
00605 return true;
00606 }
00607
00608
00612 static DiagDirection GetDepotDirection(TileIndex tile, TransportType type)
00613 {
00614 assert(IsDepotTypeTile(tile, type));
00615
00616 switch (type) {
00617 case TRANSPORT_RAIL: return GetRailDepotDirection(tile);
00618 case TRANSPORT_ROAD: return GetRoadDepotDirection(tile);
00619 case TRANSPORT_WATER: return GetShipDepotDirection(tile);
00620 default: return INVALID_DIAGDIR;
00621 }
00622 }
00623
00625 static DiagDirection GetSingleTramBit(TileIndex tile)
00626 {
00627 if (IsNormalRoadTile(tile)) {
00628 RoadBits rb = GetRoadBits(tile, ROADTYPE_TRAM);
00629 switch (rb) {
00630 case ROAD_NW: return DIAGDIR_NW;
00631 case ROAD_SW: return DIAGDIR_SW;
00632 case ROAD_SE: return DIAGDIR_SE;
00633 case ROAD_NE: return DIAGDIR_NE;
00634 default: break;
00635 }
00636 }
00637 return INVALID_DIAGDIR;
00638 }
00639
00650 static DiagDirection GetTileSingleEntry(TileIndex tile, TransportType type, uint subtype)
00651 {
00652 if (type != TRANSPORT_WATER && IsDepotTypeTile(tile, type)) return GetDepotDirection(tile, type);
00653
00654 if (type == TRANSPORT_ROAD) {
00655 if (IsStandardRoadStopTile(tile)) return GetRoadStopDir(tile);
00656 if (HasBit(subtype, ROADTYPE_TRAM)) return GetSingleTramBit(tile);
00657 }
00658
00659 return INVALID_DIAGDIR;
00660 }
00661
00671 static inline bool ForceReverse(TileIndex tile, DiagDirection dir, TransportType type, uint subtype)
00672 {
00673 DiagDirection single_entry = GetTileSingleEntry(tile, type, subtype);
00674 return single_entry != INVALID_DIAGDIR && single_entry != dir;
00675 }
00676
00688 static bool CanEnterTile(TileIndex tile, DiagDirection dir, TransportType type, uint subtype, RailTypes railtypes, Owner owner)
00689 {
00690
00691 if (IsTileType(tile, MP_TUNNELBRIDGE) && GetTunnelBridgeDirection(tile) != dir) return false;
00692
00693
00694 if (!CanEnterTileOwnerCheck(owner, tile, dir)) return false;
00695
00696
00697 if (type == TRANSPORT_RAIL) {
00698 RailType rail_type = GetTileRailType(tile);
00699 if (!HasBit(railtypes, rail_type)) return false;
00700 }
00701
00702
00703 DiagDirection single_entry = GetTileSingleEntry(tile, type, subtype);
00704 if (single_entry != INVALID_DIAGDIR && single_entry != ReverseDiagDir(dir)) return false;
00705
00706 return true;
00707 }
00708
00720 static TrackdirBits GetDriveableTrackdirBits(TileIndex dst_tile, Trackdir src_trackdir, TransportType type, uint subtype)
00721 {
00722 TrackdirBits trackdirbits = TrackStatusToTrackdirBits(GetTileTrackStatus(dst_tile, type, subtype));
00723
00724 if (trackdirbits == 0 && type == TRANSPORT_ROAD && HasBit(subtype, ROADTYPE_TRAM)) {
00725
00726
00727 switch (GetSingleTramBit(dst_tile)) {
00728 case DIAGDIR_NE:
00729 case DIAGDIR_SW:
00730 trackdirbits = TRACKDIR_BIT_X_NE | TRACKDIR_BIT_X_SW;
00731 break;
00732
00733 case DIAGDIR_NW:
00734 case DIAGDIR_SE:
00735 trackdirbits = TRACKDIR_BIT_Y_NW | TRACKDIR_BIT_Y_SE;
00736 break;
00737
00738 default: break;
00739 }
00740 }
00741
00742 DEBUG(npf, 4, "Next node: (%d, %d) [%d], possible trackdirs: 0x%X", TileX(dst_tile), TileY(dst_tile), dst_tile, trackdirbits);
00743
00744
00745 trackdirbits &= TrackdirReachesTrackdirs(src_trackdir);
00746
00747
00748 if (_settings_game.pf.forbid_90_deg && (type == TRANSPORT_RAIL || type == TRANSPORT_WATER)) trackdirbits &= ~TrackdirCrossesTrackdirs(src_trackdir);
00749
00750 DEBUG(npf, 6, "After filtering: (%d, %d), possible trackdirs: 0x%X", TileX(dst_tile), TileY(dst_tile), trackdirbits);
00751
00752 return trackdirbits;
00753 }
00754
00755
00756
00757
00758
00759
00760
00761
00762 static void NPFFollowTrack(AyStar *aystar, OpenListNode *current)
00763 {
00764
00765 Trackdir src_trackdir = current->path.node.direction;
00766 TileIndex src_tile = current->path.node.tile;
00767 DiagDirection src_exitdir = TrackdirToExitdir(src_trackdir);
00768
00769
00770
00771
00772 bool ignore_src_tile = (current->path.parent == NULL && NPFGetFlag(¤t->path.node, NPF_FLAG_IGNORE_START_TILE));
00773
00774
00775 TransportType type = (TransportType)aystar->user_data[NPF_TYPE];
00776 uint subtype = aystar->user_data[NPF_SUB_TYPE];
00777
00778
00779 aystar->num_neighbours = 0;
00780 DEBUG(npf, 4, "Expanding: (%d, %d, %d) [%d]", TileX(src_tile), TileY(src_tile), src_trackdir, src_tile);
00781
00782
00783 TileIndex dst_tile;
00784 TrackdirBits trackdirbits;
00785
00786
00787 if (ignore_src_tile) {
00788
00789 dst_tile = src_tile + TileOffsByDiagDir(src_exitdir);
00790 trackdirbits = GetDriveableTrackdirBits(dst_tile, src_trackdir, type, subtype);
00791 } else if (IsTileType(src_tile, MP_TUNNELBRIDGE) && GetTunnelBridgeDirection(src_tile) == src_exitdir) {
00792
00793 dst_tile = GetOtherTunnelBridgeEnd(src_tile);
00794 trackdirbits = TrackdirToTrackdirBits(src_trackdir);
00795 } else if (ForceReverse(src_tile, src_exitdir, type, subtype)) {
00796
00797 dst_tile = src_tile;
00798 src_trackdir = ReverseTrackdir(src_trackdir);
00799 trackdirbits = TrackdirToTrackdirBits(src_trackdir);
00800 } else {
00801
00802 dst_tile = AddTileIndexDiffCWrap(src_tile, TileIndexDiffCByDiagDir(src_exitdir));
00803
00804 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;
00805
00806 if (dst_tile == INVALID_TILE) {
00807
00808 if (type != TRANSPORT_ROAD || HasBit(subtype, ROADTYPE_TRAM)) return;
00809
00810 dst_tile = src_tile;
00811 src_trackdir = ReverseTrackdir(src_trackdir);
00812 }
00813
00814 trackdirbits = GetDriveableTrackdirBits(dst_tile, src_trackdir, type, subtype);
00815
00816 if (trackdirbits == 0) {
00817
00818 if (type != TRANSPORT_ROAD || HasBit(subtype, ROADTYPE_TRAM)) return;
00819
00820 dst_tile = src_tile;
00821 src_trackdir = ReverseTrackdir(src_trackdir);
00822
00823 trackdirbits = GetDriveableTrackdirBits(dst_tile, src_trackdir, type, subtype);
00824 }
00825 }
00826
00827 if (NPFGetFlag(¤t->path.node, NPF_FLAG_IGNORE_RESERVED)) {
00828
00829 TrackBits reserved = GetReservedTrackbits(dst_tile);
00830 trackdirbits &= ~TrackBitsToTrackdirBits(reserved);
00831
00832 uint bits = TrackdirBitsToTrackBits(trackdirbits);
00833 int i;
00834 FOR_EACH_SET_BIT(i, bits) {
00835 if (TracksOverlap(reserved | TrackToTrackBits((Track)i))) trackdirbits &= ~TrackToTrackdirBits((Track)i);
00836 }
00837 }
00838
00839
00840 uint i = 0;
00841 while (trackdirbits != 0) {
00842 Trackdir dst_trackdir = RemoveFirstTrackdir(&trackdirbits);
00843 DEBUG(npf, 5, "Expanded into trackdir: %d, remaining trackdirs: 0x%X", dst_trackdir, trackdirbits);
00844
00845
00846 if (IsTileType(dst_tile, MP_RAILWAY) && GetRailTileType(dst_tile) == RAIL_TILE_SIGNALS) {
00847 if (HasSignalOnTrackdir(dst_tile, ReverseTrackdir(dst_trackdir)) && !HasSignalOnTrackdir(dst_tile, dst_trackdir) && IsOnewaySignal(dst_tile, TrackdirToTrack(dst_trackdir)))
00848
00849 break;
00850 }
00851 {
00852
00853 AyStarNode *neighbour = &aystar->neighbours[i];
00854 neighbour->tile = dst_tile;
00855 neighbour->direction = dst_trackdir;
00856
00857 neighbour->user_data[NPF_NODE_FLAGS] = current->path.node.user_data[NPF_NODE_FLAGS];
00858 NPFFillTrackdirChoice(neighbour, current);
00859 }
00860 i++;
00861 }
00862 aystar->num_neighbours = i;
00863 }
00864
00865
00866
00867
00868
00869
00870
00871
00872
00873
00874
00875 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)
00876 {
00877 int r;
00878 NPFFoundTargetData result;
00879
00880
00881 _npf_aystar.CalculateH = heuristic_proc;
00882 _npf_aystar.EndNodeCheck = target_proc;
00883 _npf_aystar.FoundEndNode = NPFSaveTargetData;
00884 _npf_aystar.GetNeighbours = NPFFollowTrack;
00885 switch (type) {
00886 default: NOT_REACHED();
00887 case TRANSPORT_RAIL: _npf_aystar.CalculateG = NPFRailPathCost; break;
00888 case TRANSPORT_ROAD: _npf_aystar.CalculateG = NPFRoadPathCost; break;
00889 case TRANSPORT_WATER: _npf_aystar.CalculateG = NPFWaterPathCost; break;
00890 }
00891
00892
00893 start1->user_data[NPF_TRACKDIR_CHOICE] = INVALID_TRACKDIR;
00894 start1->user_data[NPF_NODE_FLAGS] = 0;
00895 NPFSetFlag(start1, NPF_FLAG_IGNORE_START_TILE, ignore_start_tile1);
00896 _npf_aystar.addstart(&_npf_aystar, start1, 0);
00897 if (start2) {
00898 start2->user_data[NPF_TRACKDIR_CHOICE] = INVALID_TRACKDIR;
00899 start2->user_data[NPF_NODE_FLAGS] = 0;
00900 NPFSetFlag(start2, NPF_FLAG_IGNORE_START_TILE, ignore_start_tile2);
00901 NPFSetFlag(start2, NPF_FLAG_REVERSE, true);
00902 _npf_aystar.addstart(&_npf_aystar, start2, reverse_penalty);
00903 }
00904
00905
00906 result.best_bird_dist = UINT_MAX;
00907 result.best_path_dist = UINT_MAX;
00908 result.best_trackdir = INVALID_TRACKDIR;
00909 result.node.tile = INVALID_TILE;
00910 result.res_okay = false;
00911 _npf_aystar.user_path = &result;
00912
00913
00914 _npf_aystar.user_target = target;
00915
00916
00917 _npf_aystar.user_data[NPF_TYPE] = type;
00918 _npf_aystar.user_data[NPF_SUB_TYPE] = sub_type;
00919 _npf_aystar.user_data[NPF_OWNER] = owner;
00920 _npf_aystar.user_data[NPF_RAILTYPES] = railtypes;
00921
00922
00923 r = AyStarMain_Main(&_npf_aystar);
00924 assert(r != AYSTAR_STILL_BUSY);
00925
00926 if (result.best_bird_dist != 0) {
00927 if (target != NULL) {
00928 DEBUG(npf, 1, "Could not find route to tile 0x%X from 0x%X.", target->dest_coords, start1->tile);
00929 } else {
00930
00931 DEBUG(npf, 1, "Could not find route to a depot from tile 0x%X.", start1->tile);
00932 }
00933
00934 }
00935 return result;
00936 }
00937
00938 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)
00939 {
00940 AyStarNode start1;
00941 AyStarNode start2;
00942
00943 start1.tile = tile1;
00944 start2.tile = tile2;
00945
00946
00947 start1.user_data[NPF_TRACKDIR_CHOICE] = INVALID_TRACKDIR;
00948 start1.direction = trackdir1;
00949 start2.direction = trackdir2;
00950 start2.user_data[NPF_TRACKDIR_CHOICE] = INVALID_TRACKDIR;
00951
00952 return NPFRouteInternal(&start1, ignore_start_tile1, (IsValidTile(tile2) ? &start2 : NULL), ignore_start_tile2, target, NPFFindStationOrTile, NPFCalcStationOrTileHeuristic, type, sub_type, owner, railtypes, 0);
00953 }
00954
00955 NPFFoundTargetData NPFRouteToStationOrTile(TileIndex tile, Trackdir trackdir, bool ignore_start_tile, NPFFindStationOrTileData *target, TransportType type, uint sub_type, Owner owner, RailTypes railtypes)
00956 {
00957 return NPFRouteToStationOrTileTwoWay(tile, trackdir, ignore_start_tile, INVALID_TILE, INVALID_TRACKDIR, false, target, type, sub_type, owner, railtypes);
00958 }
00959
00960 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)
00961 {
00962 AyStarNode start1;
00963 AyStarNode start2;
00964
00965 start1.tile = tile1;
00966 start2.tile = tile2;
00967
00968
00969 start1.user_data[NPF_TRACKDIR_CHOICE] = INVALID_TRACKDIR;
00970 start1.direction = trackdir1;
00971 start2.direction = trackdir2;
00972 start2.user_data[NPF_TRACKDIR_CHOICE] = INVALID_TRACKDIR;
00973
00974
00975
00976 return NPFRouteInternal(&start1, ignore_start_tile1, (IsValidTile(tile2) ? &start2 : NULL), ignore_start_tile2, NULL, NPFFindDepot, NPFCalcZero, type, sub_type, owner, railtypes, reverse_penalty);
00977 }
00978
00979 NPFFoundTargetData NPFRouteToDepotBreadthFirst(TileIndex tile, Trackdir trackdir, bool ignore_start_tile, TransportType type, uint sub_type, Owner owner, RailTypes railtypes)
00980 {
00981 return NPFRouteToDepotBreadthFirstTwoWay(tile, trackdir, ignore_start_tile, INVALID_TILE, INVALID_TRACKDIR, false, type, sub_type, owner, railtypes, 0);
00982 }
00983
00984 NPFFoundTargetData NPFRouteToDepotTrialError(TileIndex tile, Trackdir trackdir, bool ignore_start_tile, TransportType type, uint sub_type, Owner owner, RailTypes railtypes)
00985 {
00986
00987
00988
00989
00990
00991
00992
00993
00994 Queue depots;
00995 int r;
00996 NPFFoundTargetData best_result = {UINT_MAX, UINT_MAX, INVALID_TRACKDIR, {INVALID_TILE, INVALID_TRACKDIR, {0, 0}}, false};
00997 NPFFoundTargetData result;
00998 NPFFindStationOrTileData target;
00999 AyStarNode start;
01000 Depot *current;
01001 Depot *depot;
01002
01003 init_InsSort(&depots);
01004
01005 FOR_ALL_DEPOTS(depot) {
01006
01007
01008 if (IsDepotTypeTile(depot->xy, type) && IsTileOwner(depot->xy, owner))
01009
01010 depots.push(&depots, depot, DistanceManhattan(tile, depot->xy));
01011 }
01012
01013
01014
01015
01016 _npf_aystar.CalculateH = NPFCalcStationOrTileHeuristic;
01017 _npf_aystar.EndNodeCheck = NPFFindStationOrTile;
01018 _npf_aystar.FoundEndNode = NPFSaveTargetData;
01019 _npf_aystar.GetNeighbours = NPFFollowTrack;
01020 switch (type) {
01021 default: NOT_REACHED();
01022 case TRANSPORT_RAIL: _npf_aystar.CalculateG = NPFRailPathCost; break;
01023 case TRANSPORT_ROAD: _npf_aystar.CalculateG = NPFRoadPathCost; break;
01024 case TRANSPORT_WATER: _npf_aystar.CalculateG = NPFWaterPathCost; break;
01025 }
01026
01027
01028 target.station_index = INVALID_STATION;
01029 _npf_aystar.user_target = ⌖
01030
01031
01032 _npf_aystar.user_data[NPF_TYPE] = type;
01033 _npf_aystar.user_data[NPF_SUB_TYPE] = sub_type;
01034 _npf_aystar.user_data[NPF_OWNER] = owner;
01035
01036
01037 start.tile = tile;
01038 start.direction = trackdir;
01039
01040
01041 _npf_aystar.user_path = &result;
01042 best_result.best_path_dist = UINT_MAX;
01043 best_result.best_bird_dist = UINT_MAX;
01044
01045
01046 while ((current = (Depot*)depots.pop(&depots))) {
01047
01048
01049
01050
01051 if ( DistanceManhattan(tile, current->xy * NPF_TILE_LENGTH) > best_result.best_path_dist)
01052 break;
01053
01054
01055
01056
01057 start.user_data[NPF_TRACKDIR_CHOICE] = INVALID_TRACKDIR;
01058 start.user_data[NPF_NODE_FLAGS] = 0;
01059 NPFSetFlag(&start, NPF_FLAG_IGNORE_START_TILE, ignore_start_tile);
01060 _npf_aystar.addstart(&_npf_aystar, &start, 0);
01061
01062
01063 result.best_bird_dist = UINT_MAX;
01064 result.best_path_dist = UINT_MAX;
01065 result.best_trackdir = INVALID_TRACKDIR;
01066
01067
01068 target.dest_coords = current->xy;
01069
01070
01071 r = AyStarMain_Main(&_npf_aystar);
01072 assert(r != AYSTAR_STILL_BUSY);
01073
01074
01075 if (result.best_path_dist < best_result.best_path_dist)
01076 best_result = result;
01077 }
01078 if (result.best_bird_dist != 0) {
01079 DEBUG(npf, 1, "Could not find route to any depot from tile 0x%X.", tile);
01080 }
01081 return best_result;
01082 }
01083
01084 NPFFoundTargetData NPFRouteToSafeTile(const Vehicle *v, TileIndex tile, Trackdir trackdir, bool override_railtype)
01085 {
01086 assert(v->type == VEH_TRAIN);
01087
01088 NPFFindStationOrTileData fstd;
01089 fstd.v = v;
01090 fstd.reserve_path = true;
01091
01092 AyStarNode start1;
01093 start1.tile = tile;
01094
01095
01096 start1.user_data[NPF_TRACKDIR_CHOICE] = INVALID_TRACKDIR;
01097 start1.direction = trackdir;
01098 NPFSetFlag(&start1, NPF_FLAG_IGNORE_RESERVED, true);
01099
01100 RailTypes railtypes = v->u.rail.compatible_railtypes;
01101 if (override_railtype) railtypes |= GetRailTypeInfo(v->u.rail.railtype)->compatible_railtypes;
01102
01103
01104
01105 return NPFRouteInternal(&start1, true, NULL, false, &fstd, NPFFindSafeTile, NPFCalcZero, TRANSPORT_RAIL, 0, v->owner, railtypes, 0);
01106 }
01107
01108 void InitializeNPF()
01109 {
01110 static bool first_init = true;
01111 if (first_init) {
01112 first_init = false;
01113 init_AyStar(&_npf_aystar, NPFHash, NPF_HASH_SIZE);
01114 } else {
01115 AyStarMain_Clear(&_npf_aystar);
01116 }
01117 _npf_aystar.loops_per_tick = 0;
01118 _npf_aystar.max_path_cost = 0;
01119
01120
01121
01122 _npf_aystar.max_search_nodes = _settings_game.pf.npf.npf_max_search_nodes;
01123 }
01124
01125 void NPFFillWithOrderData(NPFFindStationOrTileData *fstd, Vehicle *v, bool reserve_path)
01126 {
01127
01128
01129
01130
01131
01132
01133 if (v->current_order.IsType(OT_GOTO_STATION) && v->type == VEH_TRAIN) {
01134 fstd->station_index = v->current_order.GetDestination();
01135
01136 fstd->dest_coords = CalcClosestStationTile(fstd->station_index, v->tile);
01137 } else {
01138 fstd->dest_coords = v->dest_tile;
01139 fstd->station_index = INVALID_STATION;
01140 }
01141 fstd->reserve_path = reserve_path;
01142 fstd->v = v;
01143 }