station_cmd.cpp

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00001 /* $Id: station_cmd.cpp 21958 2011-02-04 15:29:50Z rubidium $ */
00002 
00003 /*
00004  * This file is part of OpenTTD.
00005  * 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.
00006  * 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.
00007  * 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/>.
00008  */
00009 
00012 #include "stdafx.h"
00013 #include "aircraft.h"
00014 #include "bridge_map.h"
00015 #include "cmd_helper.h"
00016 #include "viewport_func.h"
00017 #include "command_func.h"
00018 #include "town.h"
00019 #include "news_func.h"
00020 #include "train.h"
00021 #include "roadveh.h"
00022 #include "industry.h"
00023 #include "newgrf_cargo.h"
00024 #include "newgrf_debug.h"
00025 #include "newgrf_station.h"
00026 #include "pathfinder/yapf/yapf_cache.h"
00027 #include "road_internal.h" /* For drawing catenary/checking road removal */
00028 #include "autoslope.h"
00029 #include "water.h"
00030 #include "station_gui.h"
00031 #include "strings_func.h"
00032 #include "functions.h"
00033 #include "window_func.h"
00034 #include "date_func.h"
00035 #include "vehicle_func.h"
00036 #include "string_func.h"
00037 #include "animated_tile_func.h"
00038 #include "elrail_func.h"
00039 #include "station_base.h"
00040 #include "roadstop_base.h"
00041 #include "newgrf_railtype.h"
00042 #include "waypoint_base.h"
00043 #include "waypoint_func.h"
00044 #include "pbs.h"
00045 #include "debug.h"
00046 #include "core/random_func.hpp"
00047 #include "company_base.h"
00048 #include "table/airporttile_ids.h"
00049 #include "newgrf_airporttiles.h"
00050 #include "order_backup.h"
00051 
00052 #include "table/strings.h"
00053 
00060 bool IsHangar(TileIndex t)
00061 {
00062   assert(IsTileType(t, MP_STATION));
00063 
00064   /* If the tile isn't an airport there's no chance it's a hangar. */
00065   if (!IsAirport(t)) return false;
00066 
00067   const Station *st = Station::GetByTile(t);
00068   const AirportSpec *as = st->airport.GetSpec();
00069 
00070   for (uint i = 0; i < as->nof_depots; i++) {
00071     if (st->airport.GetHangarTile(i) == t) return true;
00072   }
00073 
00074   return false;
00075 }
00076 
00084 template <class T>
00085 CommandCost GetStationAround(TileArea ta, StationID closest_station, T **st)
00086 {
00087   ta.tile -= TileDiffXY(1, 1);
00088   ta.w    += 2;
00089   ta.h    += 2;
00090 
00091   /* check around to see if there's any stations there */
00092   TILE_AREA_LOOP(tile_cur, ta) {
00093     if (IsTileType(tile_cur, MP_STATION)) {
00094       StationID t = GetStationIndex(tile_cur);
00095 
00096       if (closest_station == INVALID_STATION) {
00097         if (T::IsValidID(t)) closest_station = t;
00098       } else if (closest_station != t) {
00099         return_cmd_error(STR_ERROR_ADJOINS_MORE_THAN_ONE_EXISTING);
00100       }
00101     }
00102   }
00103   *st = (closest_station == INVALID_STATION) ? NULL : T::Get(closest_station);
00104   return CommandCost();
00105 }
00106 
00112 typedef bool (*CMSAMatcher)(TileIndex tile);
00113 
00120 static int CountMapSquareAround(TileIndex tile, CMSAMatcher cmp)
00121 {
00122   int num = 0;
00123 
00124   for (int dx = -3; dx <= 3; dx++) {
00125     for (int dy = -3; dy <= 3; dy++) {
00126       TileIndex t = TileAddWrap(tile, dx, dy);
00127       if (t != INVALID_TILE && cmp(t)) num++;
00128     }
00129   }
00130 
00131   return num;
00132 }
00133 
00139 static bool CMSAMine(TileIndex tile)
00140 {
00141   /* No industry */
00142   if (!IsTileType(tile, MP_INDUSTRY)) return false;
00143 
00144   const Industry *ind = Industry::GetByTile(tile);
00145 
00146   /* No extractive industry */
00147   if ((GetIndustrySpec(ind->type)->life_type & INDUSTRYLIFE_EXTRACTIVE) == 0) return false;
00148 
00149   for (uint i = 0; i < lengthof(ind->produced_cargo); i++) {
00150     /* The industry extracts something non-liquid, i.e. no oil or plastic, so it is a mine.
00151      * Also the production of passengers and mail is ignored. */
00152     if (ind->produced_cargo[i] != CT_INVALID &&
00153         (CargoSpec::Get(ind->produced_cargo[i])->classes & (CC_LIQUID | CC_PASSENGERS | CC_MAIL)) == 0) {
00154       return true;
00155     }
00156   }
00157 
00158   return false;
00159 }
00160 
00166 static bool CMSAWater(TileIndex tile)
00167 {
00168   return IsTileType(tile, MP_WATER) && IsWater(tile);
00169 }
00170 
00176 static bool CMSATree(TileIndex tile)
00177 {
00178   return IsTileType(tile, MP_TREES);
00179 }
00180 
00186 static bool CMSAForest(TileIndex tile)
00187 {
00188   /* No industry */
00189   if (!IsTileType(tile, MP_INDUSTRY)) return false;
00190 
00191   const Industry *ind = Industry::GetByTile(tile);
00192 
00193   /* No extractive industry */
00194   if ((GetIndustrySpec(ind->type)->life_type & INDUSTRYLIFE_ORGANIC) == 0) return false;
00195 
00196   for (uint i = 0; i < lengthof(ind->produced_cargo); i++) {
00197     /* The industry produces wood. */
00198     if (ind->produced_cargo[i] != CT_INVALID && CargoSpec::Get(ind->produced_cargo[i])->label == 'WOOD') return true;
00199   }
00200 
00201   return false;
00202 }
00203 
00204 #define M(x) ((x) - STR_SV_STNAME)
00205 
00206 enum StationNaming {
00207   STATIONNAMING_RAIL,
00208   STATIONNAMING_ROAD,
00209   STATIONNAMING_AIRPORT,
00210   STATIONNAMING_OILRIG,
00211   STATIONNAMING_DOCK,
00212   STATIONNAMING_HELIPORT,
00213 };
00214 
00216 struct StationNameInformation {
00217   uint32 free_names; 
00218   bool *indtypes;    
00219 };
00220 
00229 static bool FindNearIndustryName(TileIndex tile, void *user_data)
00230 {
00231   /* All already found industry types */
00232   StationNameInformation *sni = (StationNameInformation*)user_data;
00233   if (!IsTileType(tile, MP_INDUSTRY)) return false;
00234 
00235   /* If the station name is undefined it means that it doesn't name a station */
00236   IndustryType indtype = GetIndustryType(tile);
00237   if (GetIndustrySpec(indtype)->station_name == STR_UNDEFINED) return false;
00238 
00239   /* In all cases if an industry that provides a name is found two of
00240    * the standard names will be disabled. */
00241   sni->free_names &= ~(1 << M(STR_SV_STNAME_OILFIELD) | 1 << M(STR_SV_STNAME_MINES));
00242   return !sni->indtypes[indtype];
00243 }
00244 
00245 static StringID GenerateStationName(Station *st, TileIndex tile, StationNaming name_class)
00246 {
00247   static const uint32 _gen_station_name_bits[] = {
00248     0,                                       // STATIONNAMING_RAIL
00249     0,                                       // STATIONNAMING_ROAD
00250     1U << M(STR_SV_STNAME_AIRPORT),          // STATIONNAMING_AIRPORT
00251     1U << M(STR_SV_STNAME_OILFIELD),         // STATIONNAMING_OILRIG
00252     1U << M(STR_SV_STNAME_DOCKS),            // STATIONNAMING_DOCK
00253     1U << M(STR_SV_STNAME_HELIPORT),         // STATIONNAMING_HELIPORT
00254   };
00255 
00256   const Town *t = st->town;
00257   uint32 free_names = UINT32_MAX;
00258 
00259   bool indtypes[NUM_INDUSTRYTYPES];
00260   memset(indtypes, 0, sizeof(indtypes));
00261 
00262   const Station *s;
00263   FOR_ALL_STATIONS(s) {
00264     if (s != st && s->town == t) {
00265       if (s->indtype != IT_INVALID) {
00266         indtypes[s->indtype] = true;
00267         continue;
00268       }
00269       uint str = M(s->string_id);
00270       if (str <= 0x20) {
00271         if (str == M(STR_SV_STNAME_FOREST)) {
00272           str = M(STR_SV_STNAME_WOODS);
00273         }
00274         ClrBit(free_names, str);
00275       }
00276     }
00277   }
00278 
00279   TileIndex indtile = tile;
00280   StationNameInformation sni = { free_names, indtypes };
00281   if (CircularTileSearch(&indtile, 7, FindNearIndustryName, &sni)) {
00282     /* An industry has been found nearby */
00283     IndustryType indtype = GetIndustryType(indtile);
00284     const IndustrySpec *indsp = GetIndustrySpec(indtype);
00285     /* STR_NULL means it only disables oil rig/mines */
00286     if (indsp->station_name != STR_NULL) {
00287       st->indtype = indtype;
00288       return STR_SV_STNAME_FALLBACK;
00289     }
00290   }
00291 
00292   /* Oil rigs/mines name could be marked not free by looking for a near by industry. */
00293   free_names = sni.free_names;
00294 
00295   /* check default names */
00296   uint32 tmp = free_names & _gen_station_name_bits[name_class];
00297   if (tmp != 0) return STR_SV_STNAME + FindFirstBit(tmp);
00298 
00299   /* check mine? */
00300   if (HasBit(free_names, M(STR_SV_STNAME_MINES))) {
00301     if (CountMapSquareAround(tile, CMSAMine) >= 2) {
00302       return STR_SV_STNAME_MINES;
00303     }
00304   }
00305 
00306   /* check close enough to town to get central as name? */
00307   if (DistanceMax(tile, t->xy) < 8) {
00308     if (HasBit(free_names, M(STR_SV_STNAME))) return STR_SV_STNAME;
00309 
00310     if (HasBit(free_names, M(STR_SV_STNAME_CENTRAL))) return STR_SV_STNAME_CENTRAL;
00311   }
00312 
00313   /* Check lakeside */
00314   if (HasBit(free_names, M(STR_SV_STNAME_LAKESIDE)) &&
00315       DistanceFromEdge(tile) < 20 &&
00316       CountMapSquareAround(tile, CMSAWater) >= 5) {
00317     return STR_SV_STNAME_LAKESIDE;
00318   }
00319 
00320   /* Check woods */
00321   if (HasBit(free_names, M(STR_SV_STNAME_WOODS)) && (
00322         CountMapSquareAround(tile, CMSATree) >= 8 ||
00323         CountMapSquareAround(tile, CMSAForest) >= 2)
00324       ) {
00325     return _settings_game.game_creation.landscape == LT_TROPIC ? STR_SV_STNAME_FOREST : STR_SV_STNAME_WOODS;
00326   }
00327 
00328   /* check elevation compared to town */
00329   uint z = GetTileZ(tile);
00330   uint z2 = GetTileZ(t->xy);
00331   if (z < z2) {
00332     if (HasBit(free_names, M(STR_SV_STNAME_VALLEY))) return STR_SV_STNAME_VALLEY;
00333   } else if (z > z2) {
00334     if (HasBit(free_names, M(STR_SV_STNAME_HEIGHTS))) return STR_SV_STNAME_HEIGHTS;
00335   }
00336 
00337   /* check direction compared to town */
00338   static const int8 _direction_and_table[] = {
00339     ~( (1 << M(STR_SV_STNAME_WEST))  | (1 << M(STR_SV_STNAME_EAST)) | (1 << M(STR_SV_STNAME_NORTH)) ),
00340     ~( (1 << M(STR_SV_STNAME_SOUTH)) | (1 << M(STR_SV_STNAME_WEST)) | (1 << M(STR_SV_STNAME_NORTH)) ),
00341     ~( (1 << M(STR_SV_STNAME_SOUTH)) | (1 << M(STR_SV_STNAME_EAST)) | (1 << M(STR_SV_STNAME_NORTH)) ),
00342     ~( (1 << M(STR_SV_STNAME_SOUTH)) | (1 << M(STR_SV_STNAME_WEST)) | (1 << M(STR_SV_STNAME_EAST)) ),
00343   };
00344 
00345   free_names &= _direction_and_table[
00346     (TileX(tile) < TileX(t->xy)) +
00347     (TileY(tile) < TileY(t->xy)) * 2];
00348 
00349   tmp = free_names & ((1 << 1) | (1 << 2) | (1 << 3) | (1 << 4) | (1 << 6) | (1 << 7) | (1 << 12) | (1 << 26) | (1 << 27) | (1 << 28) | (1 << 29) | (1 << 30));
00350   return (tmp == 0) ? STR_SV_STNAME_FALLBACK : (STR_SV_STNAME + FindFirstBit(tmp));
00351 }
00352 #undef M
00353 
00359 static Station *GetClosestDeletedStation(TileIndex tile)
00360 {
00361   uint threshold = 8;
00362   Station *best_station = NULL;
00363   Station *st;
00364 
00365   FOR_ALL_STATIONS(st) {
00366     if (!st->IsInUse() && st->owner == _current_company) {
00367       uint cur_dist = DistanceManhattan(tile, st->xy);
00368 
00369       if (cur_dist < threshold) {
00370         threshold = cur_dist;
00371         best_station = st;
00372       }
00373     }
00374   }
00375 
00376   return best_station;
00377 }
00378 
00379 
00380 void Station::GetTileArea(TileArea *ta, StationType type) const
00381 {
00382   switch (type) {
00383     case STATION_RAIL:
00384       *ta = this->train_station;
00385       return;
00386 
00387     case STATION_AIRPORT:
00388       *ta = this->airport;
00389       return;
00390 
00391     case STATION_TRUCK:
00392       *ta = this->truck_station;
00393       return;
00394 
00395     case STATION_BUS:
00396       *ta = this->bus_station;
00397       return;
00398 
00399     case STATION_DOCK:
00400     case STATION_OILRIG:
00401       ta->tile = this->dock_tile;
00402       break;
00403 
00404     default: NOT_REACHED();
00405   }
00406 
00407   ta->w = 1;
00408   ta->h = 1;
00409 }
00410 
00414 void Station::UpdateVirtCoord()
00415 {
00416   Point pt = RemapCoords2(TileX(this->xy) * TILE_SIZE, TileY(this->xy) * TILE_SIZE);
00417 
00418   pt.y -= 32;
00419   if ((this->facilities & FACIL_AIRPORT) && this->airport.type == AT_OILRIG) pt.y -= 16;
00420 
00421   SetDParam(0, this->index);
00422   SetDParam(1, this->facilities);
00423   this->sign.UpdatePosition(pt.x, pt.y, STR_VIEWPORT_STATION);
00424 
00425   SetWindowDirty(WC_STATION_VIEW, this->index);
00426 }
00427 
00429 void UpdateAllStationVirtCoords()
00430 {
00431   BaseStation *st;
00432 
00433   FOR_ALL_BASE_STATIONS(st) {
00434     st->UpdateVirtCoord();
00435   }
00436 }
00437 
00443 static uint GetAcceptanceMask(const Station *st)
00444 {
00445   uint mask = 0;
00446 
00447   for (CargoID i = 0; i < NUM_CARGO; i++) {
00448     if (HasBit(st->goods[i].acceptance_pickup, GoodsEntry::ACCEPTANCE)) mask |= 1 << i;
00449   }
00450   return mask;
00451 }
00452 
00457 static void ShowRejectOrAcceptNews(const Station *st, uint num_items, CargoID *cargo, StringID msg)
00458 {
00459   for (uint i = 0; i < num_items; i++) {
00460     SetDParam(i + 1, CargoSpec::Get(cargo[i])->name);
00461   }
00462 
00463   SetDParam(0, st->index);
00464   AddNewsItem(msg, NS_ACCEPTANCE, NR_STATION, st->index);
00465 }
00466 
00474 CargoArray GetProductionAroundTiles(TileIndex tile, int w, int h, int rad)
00475 {
00476   CargoArray produced;
00477 
00478   int x = TileX(tile);
00479   int y = TileY(tile);
00480 
00481   /* expand the region by rad tiles on each side
00482    * while making sure that we remain inside the board. */
00483   int x2 = min(x + w + rad, MapSizeX());
00484   int x1 = max(x - rad, 0);
00485 
00486   int y2 = min(y + h + rad, MapSizeY());
00487   int y1 = max(y - rad, 0);
00488 
00489   assert(x1 < x2);
00490   assert(y1 < y2);
00491   assert(w > 0);
00492   assert(h > 0);
00493 
00494   TileArea ta(TileXY(x1, y1), TileXY(x2 - 1, y2 - 1));
00495 
00496   /* Loop over all tiles to get the produced cargo of
00497    * everything except industries */
00498   TILE_AREA_LOOP(tile, ta) AddProducedCargo(tile, produced);
00499 
00500   /* Loop over the industries. They produce cargo for
00501    * anything that is within 'rad' from their bounding
00502    * box. As such if you have e.g. a oil well the tile
00503    * area loop might not hit an industry tile while
00504    * the industry would produce cargo for the station.
00505    */
00506   const Industry *i;
00507   FOR_ALL_INDUSTRIES(i) {
00508     if (!ta.Intersects(i->location)) continue;
00509 
00510     for (uint j = 0; j < lengthof(i->produced_cargo); j++) {
00511       CargoID cargo = i->produced_cargo[j];
00512       if (cargo != CT_INVALID) produced[cargo]++;
00513     }
00514   }
00515 
00516   return produced;
00517 }
00518 
00527 CargoArray GetAcceptanceAroundTiles(TileIndex tile, int w, int h, int rad, uint32 *always_accepted)
00528 {
00529   CargoArray acceptance;
00530   if (always_accepted != NULL) *always_accepted = 0;
00531 
00532   int x = TileX(tile);
00533   int y = TileY(tile);
00534 
00535   /* expand the region by rad tiles on each side
00536    * while making sure that we remain inside the board. */
00537   int x2 = min(x + w + rad, MapSizeX());
00538   int y2 = min(y + h + rad, MapSizeY());
00539   int x1 = max(x - rad, 0);
00540   int y1 = max(y - rad, 0);
00541 
00542   assert(x1 < x2);
00543   assert(y1 < y2);
00544   assert(w > 0);
00545   assert(h > 0);
00546 
00547   for (int yc = y1; yc != y2; yc++) {
00548     for (int xc = x1; xc != x2; xc++) {
00549       TileIndex tile = TileXY(xc, yc);
00550       AddAcceptedCargo(tile, acceptance, always_accepted);
00551     }
00552   }
00553 
00554   return acceptance;
00555 }
00556 
00562 void UpdateStationAcceptance(Station *st, bool show_msg)
00563 {
00564   /* old accepted goods types */
00565   uint old_acc = GetAcceptanceMask(st);
00566 
00567   /* And retrieve the acceptance. */
00568   CargoArray acceptance;
00569   if (!st->rect.IsEmpty()) {
00570     acceptance = GetAcceptanceAroundTiles(
00571       TileXY(st->rect.left, st->rect.top),
00572       st->rect.right  - st->rect.left + 1,
00573       st->rect.bottom - st->rect.top  + 1,
00574       st->GetCatchmentRadius(),
00575       &st->always_accepted
00576     );
00577   }
00578 
00579   /* Adjust in case our station only accepts fewer kinds of goods */
00580   for (CargoID i = 0; i < NUM_CARGO; i++) {
00581     uint amt = min(acceptance[i], 15);
00582 
00583     /* Make sure the station can accept the goods type. */
00584     bool is_passengers = IsCargoInClass(i, CC_PASSENGERS);
00585     if ((!is_passengers && !(st->facilities & ~FACIL_BUS_STOP)) ||
00586         (is_passengers && !(st->facilities & ~FACIL_TRUCK_STOP))) {
00587       amt = 0;
00588     }
00589 
00590     SB(st->goods[i].acceptance_pickup, GoodsEntry::ACCEPTANCE, 1, amt >= 8);
00591   }
00592 
00593   /* Only show a message in case the acceptance was actually changed. */
00594   uint new_acc = GetAcceptanceMask(st);
00595   if (old_acc == new_acc) return;
00596 
00597   /* show a message to report that the acceptance was changed? */
00598   if (show_msg && st->owner == _local_company && st->IsInUse()) {
00599     /* List of accept and reject strings for different number of
00600      * cargo types */
00601     static const StringID accept_msg[] = {
00602       STR_NEWS_STATION_NOW_ACCEPTS_CARGO,
00603       STR_NEWS_STATION_NOW_ACCEPTS_CARGO_AND_CARGO,
00604     };
00605     static const StringID reject_msg[] = {
00606       STR_NEWS_STATION_NO_LONGER_ACCEPTS_CARGO,
00607       STR_NEWS_STATION_NO_LONGER_ACCEPTS_CARGO_OR_CARGO,
00608     };
00609 
00610     /* Array of accepted and rejected cargo types */
00611     CargoID accepts[2] = { CT_INVALID, CT_INVALID };
00612     CargoID rejects[2] = { CT_INVALID, CT_INVALID };
00613     uint num_acc = 0;
00614     uint num_rej = 0;
00615 
00616     /* Test each cargo type to see if its acceptange has changed */
00617     for (CargoID i = 0; i < NUM_CARGO; i++) {
00618       if (HasBit(new_acc, i)) {
00619         if (!HasBit(old_acc, i) && num_acc < lengthof(accepts)) {
00620           /* New cargo is accepted */
00621           accepts[num_acc++] = i;
00622         }
00623       } else {
00624         if (HasBit(old_acc, i) && num_rej < lengthof(rejects)) {
00625           /* Old cargo is no longer accepted */
00626           rejects[num_rej++] = i;
00627         }
00628       }
00629     }
00630 
00631     /* Show news message if there are any changes */
00632     if (num_acc > 0) ShowRejectOrAcceptNews(st, num_acc, accepts, accept_msg[num_acc - 1]);
00633     if (num_rej > 0) ShowRejectOrAcceptNews(st, num_rej, rejects, reject_msg[num_rej - 1]);
00634   }
00635 
00636   /* redraw the station view since acceptance changed */
00637   SetWindowWidgetDirty(WC_STATION_VIEW, st->index, SVW_ACCEPTLIST);
00638 }
00639 
00640 static void UpdateStationSignCoord(BaseStation *st)
00641 {
00642   const StationRect *r = &st->rect;
00643 
00644   if (r->IsEmpty()) return; // no tiles belong to this station
00645 
00646   /* clamp sign coord to be inside the station rect */
00647   st->xy = TileXY(ClampU(TileX(st->xy), r->left, r->right), ClampU(TileY(st->xy), r->top, r->bottom));
00648   st->UpdateVirtCoord();
00649 }
00650 
00657 static void DeleteStationIfEmpty(BaseStation *st)
00658 {
00659   if (!st->IsInUse()) {
00660     st->delete_ctr = 0;
00661     InvalidateWindowData(WC_STATION_LIST, st->owner, 0);
00662   }
00663   /* station remains but it probably lost some parts - station sign should stay in the station boundaries */
00664   UpdateStationSignCoord(st);
00665 }
00666 
00667 CommandCost ClearTile_Station(TileIndex tile, DoCommandFlag flags);
00668 
00677 CommandCost CheckBuildableTile(TileIndex tile, uint invalid_dirs, int &allowed_z, bool check_bridge = true)
00678 {
00679   if (check_bridge && MayHaveBridgeAbove(tile) && IsBridgeAbove(tile)) {
00680     return_cmd_error(STR_ERROR_MUST_DEMOLISH_BRIDGE_FIRST);
00681   }
00682 
00683   CommandCost ret = EnsureNoVehicleOnGround(tile);
00684   if (ret.Failed()) return ret;
00685 
00686   uint z;
00687   Slope tileh = GetTileSlope(tile, &z);
00688 
00689   /* Prohibit building if
00690    *   1) The tile is "steep" (i.e. stretches two height levels).
00691    *   2) The tile is non-flat and the build_on_slopes switch is disabled.
00692    */
00693   if (IsSteepSlope(tileh) ||
00694       ((!_settings_game.construction.build_on_slopes) && tileh != SLOPE_FLAT)) {
00695     return_cmd_error(STR_ERROR_FLAT_LAND_REQUIRED);
00696   }
00697 
00698   CommandCost cost(EXPENSES_CONSTRUCTION);
00699   int flat_z = z;
00700   if (tileh != SLOPE_FLAT) {
00701     /* Forbid building if the tile faces a slope in a invalid direction. */
00702     if ((HasBit(invalid_dirs, DIAGDIR_NE) && !(tileh & SLOPE_NE)) ||
00703         (HasBit(invalid_dirs, DIAGDIR_SE) && !(tileh & SLOPE_SE)) ||
00704         (HasBit(invalid_dirs, DIAGDIR_SW) && !(tileh & SLOPE_SW)) ||
00705         (HasBit(invalid_dirs, DIAGDIR_NW) && !(tileh & SLOPE_NW))) {
00706       return_cmd_error(STR_ERROR_FLAT_LAND_REQUIRED);
00707     }
00708     cost.AddCost(_price[PR_BUILD_FOUNDATION]);
00709     flat_z += TILE_HEIGHT;
00710   }
00711 
00712   /* The level of this tile must be equal to allowed_z. */
00713   if (allowed_z < 0) {
00714     /* First tile. */
00715     allowed_z = flat_z;
00716   } else if (allowed_z != flat_z) {
00717     return_cmd_error(STR_ERROR_FLAT_LAND_REQUIRED);
00718   }
00719 
00720   return cost;
00721 }
00722 
00729 CommandCost CheckFlatLand(TileArea tile_area, DoCommandFlag flags)
00730 {
00731   CommandCost cost(EXPENSES_CONSTRUCTION);
00732   int allowed_z = -1;
00733 
00734   TILE_AREA_LOOP(tile_cur, tile_area) {
00735     CommandCost ret = CheckBuildableTile(tile_cur, 0, allowed_z);
00736     if (ret.Failed()) return ret;
00737     cost.AddCost(ret);
00738 
00739     ret = DoCommand(tile_cur, 0, 0, flags, CMD_LANDSCAPE_CLEAR);
00740     if (ret.Failed()) return ret;
00741     cost.AddCost(ret);
00742   }
00743 
00744   return cost;
00745 }
00746 
00757 static CommandCost CheckFlatLandRailStation(TileArea tile_area, DoCommandFlag flags, uint invalid_dirs, StationID *station, RailType rt, SmallVector<Train *, 4> &affected_vehicles)
00758 {
00759   CommandCost cost(EXPENSES_CONSTRUCTION);
00760   int allowed_z = -1;
00761 
00762   TILE_AREA_LOOP(tile_cur, tile_area) {
00763     CommandCost ret = CheckBuildableTile(tile_cur, invalid_dirs, allowed_z);
00764     if (ret.Failed()) return ret;
00765     cost.AddCost(ret);
00766 
00767     /* if station is set, then we have special handling to allow building on top of already existing stations.
00768      * so station points to INVALID_STATION if we can build on any station.
00769      * Or it points to a station if we're only allowed to build on exactly that station. */
00770     if (station != NULL && IsTileType(tile_cur, MP_STATION)) {
00771       if (!IsRailStation(tile_cur)) {
00772         return ClearTile_Station(tile_cur, DC_AUTO); // get error message
00773       } else {
00774         StationID st = GetStationIndex(tile_cur);
00775         if (*station == INVALID_STATION) {
00776           *station = st;
00777         } else if (*station != st) {
00778           return_cmd_error(STR_ERROR_ADJOINS_MORE_THAN_ONE_EXISTING);
00779         }
00780       }
00781     } else {
00782       /* Rail type is only valid when building a railway station; if station to
00783        * build isn't a rail station it's INVALID_RAILTYPE. */
00784       if (rt != INVALID_RAILTYPE &&
00785           IsPlainRailTile(tile_cur) && !HasSignals(tile_cur) &&
00786           HasPowerOnRail(GetRailType(tile_cur), rt)) {
00787         /* Allow overbuilding if the tile:
00788          *  - has rail, but no signals
00789          *  - it has exactly one track
00790          *  - the track is in line with the station
00791          *  - the current rail type has power on the to-be-built type (e.g. convert normal rail to el rail)
00792          */
00793         TrackBits tracks = GetTrackBits(tile_cur);
00794         Track track = RemoveFirstTrack(&tracks);
00795         Track expected_track = HasBit(invalid_dirs, DIAGDIR_NE) ? TRACK_X : TRACK_Y;
00796 
00797         if (tracks == TRACK_BIT_NONE && track == expected_track) {
00798           /* Check for trains having a reservation for this tile. */
00799           if (HasBit(GetRailReservationTrackBits(tile_cur), track)) {
00800             Train *v = GetTrainForReservation(tile_cur, track);
00801             if (v != NULL) {
00802               *affected_vehicles.Append() = v;
00803             }
00804           }
00805           CommandCost ret = DoCommand(tile_cur, 0, track, flags, CMD_REMOVE_SINGLE_RAIL);
00806           if (ret.Failed()) return ret;
00807           cost.AddCost(ret);
00808           /* With flags & ~DC_EXEC CmdLandscapeClear would fail since the rail still exists */
00809           continue;
00810         }
00811       }
00812       ret = DoCommand(tile_cur, 0, 0, flags, CMD_LANDSCAPE_CLEAR);
00813       if (ret.Failed()) return ret;
00814       cost.AddCost(ret);
00815     }
00816   }
00817 
00818   return cost;
00819 }
00820 
00833 static CommandCost CheckFlatLandRoadStop(TileArea tile_area, DoCommandFlag flags, uint invalid_dirs, bool is_drive_through, bool is_truck_stop, Axis axis, StationID *station, RoadTypes rts)
00834 {
00835   CommandCost cost(EXPENSES_CONSTRUCTION);
00836   int allowed_z = -1;
00837 
00838   TILE_AREA_LOOP(cur_tile, tile_area) {
00839     CommandCost ret = CheckBuildableTile(cur_tile, invalid_dirs, allowed_z);
00840     if (ret.Failed()) return ret;
00841     cost.AddCost(ret);
00842 
00843     /* If station is set, then we have special handling to allow building on top of already existing stations.
00844      * Station points to INVALID_STATION if we can build on any station.
00845      * Or it points to a station if we're only allowed to build on exactly that station. */
00846     if (station != NULL && IsTileType(cur_tile, MP_STATION)) {
00847       if (!IsRoadStop(cur_tile)) {
00848         return ClearTile_Station(cur_tile, DC_AUTO); // Get error message.
00849       } else {
00850         if (is_truck_stop != IsTruckStop(cur_tile) ||
00851             is_drive_through != IsDriveThroughStopTile(cur_tile)) {
00852           return ClearTile_Station(cur_tile, DC_AUTO); // Get error message.
00853         }
00854         /* Drive-through station in the wrong direction. */
00855         if (is_drive_through && IsDriveThroughStopTile(cur_tile) && DiagDirToAxis(GetRoadStopDir(cur_tile)) != axis){
00856           return_cmd_error(STR_ERROR_DRIVE_THROUGH_DIRECTION);
00857         }
00858         StationID st = GetStationIndex(cur_tile);
00859         if (*station == INVALID_STATION) {
00860           *station = st;
00861         } else if (*station != st) {
00862           return_cmd_error(STR_ERROR_ADJOINS_MORE_THAN_ONE_EXISTING);
00863         }
00864       }
00865     } else {
00866       bool build_over_road = is_drive_through && IsNormalRoadTile(cur_tile);
00867       /* Road bits in the wrong direction. */
00868       RoadBits rb = IsNormalRoadTile(cur_tile) ? GetAllRoadBits(cur_tile) : ROAD_NONE;
00869       if (build_over_road && (rb & (axis == AXIS_X ? ROAD_Y : ROAD_X)) != 0) {
00870         /* Someone was pedantic and *NEEDED* three fracking different error messages. */
00871         switch (CountBits(rb)) {
00872           case 1:
00873             return_cmd_error(STR_ERROR_DRIVE_THROUGH_DIRECTION);
00874 
00875           case 2:
00876             if (rb == ROAD_X || rb == ROAD_Y) return_cmd_error(STR_ERROR_DRIVE_THROUGH_DIRECTION);
00877             return_cmd_error(STR_ERROR_DRIVE_THROUGH_CORNER);
00878 
00879           default: // 3 or 4
00880             return_cmd_error(STR_ERROR_DRIVE_THROUGH_JUNCTION);
00881         }
00882       }
00883 
00884       RoadTypes cur_rts = IsNormalRoadTile(cur_tile) ? GetRoadTypes(cur_tile) : ROADTYPES_NONE;
00885       uint num_roadbits = 0;
00886       if (build_over_road) {
00887         /* There is a road, check if we can build road+tram stop over it. */
00888         if (HasBit(cur_rts, ROADTYPE_ROAD)) {
00889           Owner road_owner = GetRoadOwner(cur_tile, ROADTYPE_ROAD);
00890           if (road_owner == OWNER_TOWN) {
00891             if (!_settings_game.construction.road_stop_on_town_road) return_cmd_error(STR_ERROR_DRIVE_THROUGH_ON_TOWN_ROAD);
00892           } else if (!_settings_game.construction.road_stop_on_competitor_road && road_owner != OWNER_NONE) {
00893             CommandCost ret = CheckOwnership(road_owner);
00894             if (ret.Failed()) return ret;
00895           }
00896           num_roadbits += CountBits(GetRoadBits(cur_tile, ROADTYPE_ROAD));
00897         }
00898 
00899         /* There is a tram, check if we can build road+tram stop over it. */
00900         if (HasBit(cur_rts, ROADTYPE_TRAM)) {
00901           Owner tram_owner = GetRoadOwner(cur_tile, ROADTYPE_TRAM);
00902           if (!_settings_game.construction.road_stop_on_competitor_road && tram_owner != OWNER_NONE) {
00903             CommandCost ret = CheckOwnership(tram_owner);
00904             if (ret.Failed()) return ret;
00905           }
00906           num_roadbits += CountBits(GetRoadBits(cur_tile, ROADTYPE_TRAM));
00907         }
00908 
00909         /* Take into account existing roadbits. */
00910         rts |= cur_rts;
00911       } else {
00912         ret = DoCommand(cur_tile, 0, 0, flags, CMD_LANDSCAPE_CLEAR);
00913         if (ret.Failed()) return ret;
00914         cost.AddCost(ret);
00915       }
00916 
00917       uint roadbits_to_build = CountBits(rts) * 2 - num_roadbits;
00918       cost.AddCost(_price[PR_BUILD_ROAD] * roadbits_to_build);
00919     }
00920   }
00921 
00922   return cost;
00923 }
00924 
00932 CommandCost CanExpandRailStation(const BaseStation *st, TileArea &new_ta, Axis axis)
00933 {
00934   TileArea cur_ta = st->train_station;
00935 
00936   /* determine new size of train station region.. */
00937   int x = min(TileX(cur_ta.tile), TileX(new_ta.tile));
00938   int y = min(TileY(cur_ta.tile), TileY(new_ta.tile));
00939   new_ta.w = max(TileX(cur_ta.tile) + cur_ta.w, TileX(new_ta.tile) + new_ta.w) - x;
00940   new_ta.h = max(TileY(cur_ta.tile) + cur_ta.h, TileY(new_ta.tile) + new_ta.h) - y;
00941   new_ta.tile = TileXY(x, y);
00942 
00943   /* make sure the final size is not too big. */
00944   if (new_ta.w > _settings_game.station.station_spread || new_ta.h > _settings_game.station.station_spread) {
00945     return_cmd_error(STR_ERROR_STATION_TOO_SPREAD_OUT);
00946   }
00947 
00948   return CommandCost();
00949 }
00950 
00951 static inline byte *CreateSingle(byte *layout, int n)
00952 {
00953   int i = n;
00954   do *layout++ = 0; while (--i);
00955   layout[((n - 1) >> 1) - n] = 2;
00956   return layout;
00957 }
00958 
00959 static inline byte *CreateMulti(byte *layout, int n, byte b)
00960 {
00961   int i = n;
00962   do *layout++ = b; while (--i);
00963   if (n > 4) {
00964     layout[0 - n] = 0;
00965     layout[n - 1 - n] = 0;
00966   }
00967   return layout;
00968 }
00969 
00970 void GetStationLayout(byte *layout, int numtracks, int plat_len, const StationSpec *statspec)
00971 {
00972   if (statspec != NULL && statspec->lengths >= plat_len &&
00973       statspec->platforms[plat_len - 1] >= numtracks &&
00974       statspec->layouts[plat_len - 1][numtracks - 1]) {
00975     /* Custom layout defined, follow it. */
00976     memcpy(layout, statspec->layouts[plat_len - 1][numtracks - 1],
00977       plat_len * numtracks);
00978     return;
00979   }
00980 
00981   if (plat_len == 1) {
00982     CreateSingle(layout, numtracks);
00983   } else {
00984     if (numtracks & 1) layout = CreateSingle(layout, plat_len);
00985     numtracks >>= 1;
00986 
00987     while (--numtracks >= 0) {
00988       layout = CreateMulti(layout, plat_len, 4);
00989       layout = CreateMulti(layout, plat_len, 6);
00990     }
00991   }
00992 }
00993 
01005 template <class T, StringID error_message>
01006 CommandCost FindJoiningBaseStation(StationID existing_station, StationID station_to_join, bool adjacent, TileArea ta, T **st)
01007 {
01008   assert(*st == NULL);
01009   bool check_surrounding = true;
01010 
01011   if (_settings_game.station.adjacent_stations) {
01012     if (existing_station != INVALID_STATION) {
01013       if (adjacent && existing_station != station_to_join) {
01014         /* You can't build an adjacent station over the top of one that
01015          * already exists. */
01016         return_cmd_error(error_message);
01017       } else {
01018         /* Extend the current station, and don't check whether it will
01019          * be near any other stations. */
01020         *st = T::GetIfValid(existing_station);
01021         check_surrounding = (*st == NULL);
01022       }
01023     } else {
01024       /* There's no station here. Don't check the tiles surrounding this
01025        * one if the company wanted to build an adjacent station. */
01026       if (adjacent) check_surrounding = false;
01027     }
01028   }
01029 
01030   if (check_surrounding) {
01031     /* Make sure there are no similar stations around us. */
01032     CommandCost ret = GetStationAround(ta, existing_station, st);
01033     if (ret.Failed()) return ret;
01034   }
01035 
01036   /* Distant join */
01037   if (*st == NULL && station_to_join != INVALID_STATION) *st = T::GetIfValid(station_to_join);
01038 
01039   return CommandCost();
01040 }
01041 
01051 static CommandCost FindJoiningStation(StationID existing_station, StationID station_to_join, bool adjacent, TileArea ta, Station **st)
01052 {
01053   return FindJoiningBaseStation<Station, STR_ERROR_MUST_REMOVE_RAILWAY_STATION_FIRST>(existing_station, station_to_join, adjacent, ta, st);
01054 }
01055 
01065 CommandCost FindJoiningWaypoint(StationID existing_waypoint, StationID waypoint_to_join, bool adjacent, TileArea ta, Waypoint **wp)
01066 {
01067   return FindJoiningBaseStation<Waypoint, STR_ERROR_MUST_REMOVE_RAILWAYPOINT_FIRST>(existing_waypoint, waypoint_to_join, adjacent, ta, wp);
01068 }
01069 
01087 CommandCost CmdBuildRailStation(TileIndex tile_org, DoCommandFlag flags, uint32 p1, uint32 p2, const char *text)
01088 {
01089   /* Unpack parameters */
01090   RailType rt    = Extract<RailType, 0, 4>(p1);
01091   Axis axis      = Extract<Axis, 4, 1>(p1);
01092   byte numtracks = GB(p1,  8, 8);
01093   byte plat_len  = GB(p1, 16, 8);
01094   bool adjacent  = HasBit(p1, 24);
01095 
01096   StationClassID spec_class = Extract<StationClassID, 0, 8>(p2);
01097   byte spec_index           = GB(p2, 8, 8);
01098   StationID station_to_join = GB(p2, 16, 16);
01099 
01100   /* Does the authority allow this? */
01101   CommandCost ret = CheckIfAuthorityAllowsNewStation(tile_org, flags);
01102   if (ret.Failed()) return ret;
01103 
01104   if (!ValParamRailtype(rt)) return CMD_ERROR;
01105 
01106   /* Check if the given station class is valid */
01107   if ((uint)spec_class >= StationClass::GetCount() || spec_class == STAT_CLASS_WAYP) return CMD_ERROR;
01108   if (spec_index >= StationClass::GetCount(spec_class)) return CMD_ERROR;
01109   if (plat_len == 0 || numtracks == 0) return CMD_ERROR;
01110 
01111   int w_org, h_org;
01112   if (axis == AXIS_X) {
01113     w_org = plat_len;
01114     h_org = numtracks;
01115   } else {
01116     h_org = plat_len;
01117     w_org = numtracks;
01118   }
01119 
01120   bool reuse = (station_to_join != NEW_STATION);
01121   if (!reuse) station_to_join = INVALID_STATION;
01122   bool distant_join = (station_to_join != INVALID_STATION);
01123 
01124   if (distant_join && (!_settings_game.station.distant_join_stations || !Station::IsValidID(station_to_join))) return CMD_ERROR;
01125 
01126   if (h_org > _settings_game.station.station_spread || w_org > _settings_game.station.station_spread) return CMD_ERROR;
01127 
01128   /* these values are those that will be stored in train_tile and station_platforms */
01129   TileArea new_location(tile_org, w_org, h_org);
01130 
01131   /* Make sure the area below consists of clear tiles. (OR tiles belonging to a certain rail station) */
01132   StationID est = INVALID_STATION;
01133   SmallVector<Train *, 4> affected_vehicles;
01134   /* Clear the land below the station. */
01135   CommandCost cost = CheckFlatLandRailStation(TileArea(tile_org, w_org, h_org), flags, 5 << axis, &est, rt, affected_vehicles);
01136   if (cost.Failed()) return cost;
01137   /* Add construction expenses. */
01138   cost.AddCost((numtracks * _price[PR_BUILD_STATION_RAIL] + _price[PR_BUILD_STATION_RAIL_LENGTH]) * plat_len);
01139   cost.AddCost(numtracks * plat_len * RailBuildCost(rt));
01140 
01141   Station *st = NULL;
01142   ret = FindJoiningStation(est, station_to_join, adjacent, new_location, &st);
01143   if (ret.Failed()) return ret;
01144 
01145   /* See if there is a deleted station close to us. */
01146   if (st == NULL && reuse) st = GetClosestDeletedStation(tile_org);
01147 
01148   if (st != NULL) {
01149     /* Reuse an existing station. */
01150     if (st->owner != _current_company) return_cmd_error(STR_ERROR_TOO_CLOSE_TO_ANOTHER_STATION);
01151 
01152     if (st->train_station.tile != INVALID_TILE) {
01153       CommandCost ret = CanExpandRailStation(st, new_location, axis);
01154       if (ret.Failed()) return ret;
01155     }
01156 
01157     /* XXX can't we pack this in the "else" part of the if above? */
01158     CommandCost ret = st->rect.BeforeAddRect(tile_org, w_org, h_org, StationRect::ADD_TEST);
01159     if (ret.Failed()) return ret;
01160   } else {
01161     /* allocate and initialize new station */
01162     if (!Station::CanAllocateItem()) return_cmd_error(STR_ERROR_TOO_MANY_STATIONS_LOADING);
01163 
01164     if (flags & DC_EXEC) {
01165       st = new Station(tile_org);
01166 
01167       st->town = ClosestTownFromTile(tile_org, UINT_MAX);
01168       st->string_id = GenerateStationName(st, tile_org, STATIONNAMING_RAIL);
01169 
01170       if (Company::IsValidID(_current_company)) {
01171         SetBit(st->town->have_ratings, _current_company);
01172       }
01173     }
01174   }
01175 
01176   /* Check if we can allocate a custom stationspec to this station */
01177   const StationSpec *statspec = StationClass::Get(spec_class, spec_index);
01178   int specindex = AllocateSpecToStation(statspec, st, (flags & DC_EXEC) != 0);
01179   if (specindex == -1) return_cmd_error(STR_ERROR_TOO_MANY_STATION_SPECS);
01180 
01181   if (statspec != NULL) {
01182     /* Perform NewStation checks */
01183 
01184     /* Check if the station size is permitted */
01185     if (HasBit(statspec->disallowed_platforms, numtracks - 1) || HasBit(statspec->disallowed_lengths, plat_len - 1)) {
01186       return CMD_ERROR;
01187     }
01188 
01189     /* Check if the station is buildable */
01190     if (HasBit(statspec->callback_mask, CBM_STATION_AVAIL) && GB(GetStationCallback(CBID_STATION_AVAILABILITY, 0, 0, statspec, NULL, INVALID_TILE), 0, 8) == 0) {
01191       return CMD_ERROR;
01192     }
01193   }
01194 
01195   if (flags & DC_EXEC) {
01196     TileIndexDiff tile_delta;
01197     byte *layout_ptr;
01198     byte numtracks_orig;
01199     Track track;
01200 
01201     st->train_station = new_location;
01202     st->AddFacility(FACIL_TRAIN, new_location.tile);
01203 
01204     st->rect.BeforeAddRect(tile_org, w_org, h_org, StationRect::ADD_TRY);
01205 
01206     if (statspec != NULL) {
01207       /* Include this station spec's animation trigger bitmask
01208        * in the station's cached copy. */
01209       st->cached_anim_triggers |= statspec->animation.triggers;
01210     }
01211 
01212     tile_delta = (axis == AXIS_X ? TileDiffXY(1, 0) : TileDiffXY(0, 1));
01213     track = AxisToTrack(axis);
01214 
01215     layout_ptr = AllocaM(byte, numtracks * plat_len);
01216     GetStationLayout(layout_ptr, numtracks, plat_len, statspec);
01217 
01218     numtracks_orig = numtracks;
01219 
01220     do {
01221       TileIndex tile = tile_org;
01222       int w = plat_len;
01223       do {
01224         byte layout = *layout_ptr++;
01225         if (IsRailStationTile(tile) && HasStationReservation(tile)) {
01226           /* Check for trains having a reservation for this tile. */
01227           Train *v = GetTrainForReservation(tile, AxisToTrack(GetRailStationAxis(tile)));
01228           if (v != NULL) {
01229             FreeTrainTrackReservation(v);
01230             *affected_vehicles.Append() = v;
01231             if (IsRailStationTile(v->tile)) SetRailStationPlatformReservation(v->tile, TrackdirToExitdir(v->GetVehicleTrackdir()), false);
01232             for (; v->Next() != NULL; v = v->Next()) { }
01233             if (IsRailStationTile(v->tile)) SetRailStationPlatformReservation(v->tile, TrackdirToExitdir(ReverseTrackdir(v->GetVehicleTrackdir())), false);
01234           }
01235         }
01236 
01237         /* Remove animation if overbuilding */
01238         DeleteAnimatedTile(tile);
01239         byte old_specindex = HasStationTileRail(tile) ? GetCustomStationSpecIndex(tile) : 0;
01240         MakeRailStation(tile, st->owner, st->index, axis, layout & ~1, rt);
01241         /* Free the spec if we overbuild something */
01242         DeallocateSpecFromStation(st, old_specindex);
01243 
01244         SetCustomStationSpecIndex(tile, specindex);
01245         SetStationTileRandomBits(tile, GB(Random(), 0, 4));
01246         SetAnimationFrame(tile, 0);
01247 
01248         if (statspec != NULL) {
01249           /* Use a fixed axis for GetPlatformInfo as our platforms / numtracks are always the right way around */
01250           uint32 platinfo = GetPlatformInfo(AXIS_X, 0, plat_len, numtracks_orig, plat_len - w, numtracks_orig - numtracks, false);
01251 
01252           /* As the station is not yet completely finished, the station does not yet exist. */
01253           uint16 callback = GetStationCallback(CBID_STATION_TILE_LAYOUT, platinfo, 0, statspec, NULL, tile);
01254           if (callback != CALLBACK_FAILED && callback < 8) SetStationGfx(tile, (callback & ~1) + axis);
01255 
01256           /* Trigger station animation -- after building? */
01257           TriggerStationAnimation(st, tile, SAT_BUILT);
01258         }
01259 
01260         tile += tile_delta;
01261       } while (--w);
01262       AddTrackToSignalBuffer(tile_org, track, _current_company);
01263       YapfNotifyTrackLayoutChange(tile_org, track);
01264       tile_org += tile_delta ^ TileDiffXY(1, 1); // perpendicular to tile_delta
01265     } while (--numtracks);
01266 
01267     for (uint i = 0; i < affected_vehicles.Length(); ++i) {
01268       /* Restore reservations of trains. */
01269       Train *v = affected_vehicles[i];
01270       if (IsRailStationTile(v->tile)) SetRailStationPlatformReservation(v->tile, TrackdirToExitdir(v->GetVehicleTrackdir()), true);
01271       TryPathReserve(v, true, true);
01272       for (; v->Next() != NULL; v = v->Next()) { }
01273       if (IsRailStationTile(v->tile)) SetRailStationPlatformReservation(v->tile, TrackdirToExitdir(ReverseTrackdir(v->GetVehicleTrackdir())), true);
01274     }
01275 
01276     st->MarkTilesDirty(false);
01277     st->UpdateVirtCoord();
01278     UpdateStationAcceptance(st, false);
01279     st->RecomputeIndustriesNear();
01280     InvalidateWindowData(WC_SELECT_STATION, 0, 0);
01281     InvalidateWindowData(WC_STATION_LIST, st->owner, 0);
01282     SetWindowWidgetDirty(WC_STATION_VIEW, st->index, SVW_TRAINS);
01283   }
01284 
01285   return cost;
01286 }
01287 
01288 static void MakeRailStationAreaSmaller(BaseStation *st)
01289 {
01290   TileArea ta = st->train_station;
01291 
01292 restart:
01293 
01294   /* too small? */
01295   if (ta.w != 0 && ta.h != 0) {
01296     /* check the left side, x = constant, y changes */
01297     for (uint i = 0; !st->TileBelongsToRailStation(ta.tile + TileDiffXY(0, i));) {
01298       /* the left side is unused? */
01299       if (++i == ta.h) {
01300         ta.tile += TileDiffXY(1, 0);
01301         ta.w--;
01302         goto restart;
01303       }
01304     }
01305 
01306     /* check the right side, x = constant, y changes */
01307     for (uint i = 0; !st->TileBelongsToRailStation(ta.tile + TileDiffXY(ta.w - 1, i));) {
01308       /* the right side is unused? */
01309       if (++i == ta.h) {
01310         ta.w--;
01311         goto restart;
01312       }
01313     }
01314 
01315     /* check the upper side, y = constant, x changes */
01316     for (uint i = 0; !st->TileBelongsToRailStation(ta.tile + TileDiffXY(i, 0));) {
01317       /* the left side is unused? */
01318       if (++i == ta.w) {
01319         ta.tile += TileDiffXY(0, 1);
01320         ta.h--;
01321         goto restart;
01322       }
01323     }
01324 
01325     /* check the lower side, y = constant, x changes */
01326     for (uint i = 0; !st->TileBelongsToRailStation(ta.tile + TileDiffXY(i, ta.h - 1));) {
01327       /* the left side is unused? */
01328       if (++i == ta.w) {
01329         ta.h--;
01330         goto restart;
01331       }
01332     }
01333   } else {
01334     ta.Clear();
01335   }
01336 
01337   st->train_station = ta;
01338 }
01339 
01350 template <class T>
01351 CommandCost RemoveFromRailBaseStation(TileArea ta, SmallVector<T *, 4> &affected_stations, DoCommandFlag flags, Money removal_cost, bool keep_rail)
01352 {
01353   /* Count of the number of tiles removed */
01354   int quantity = 0;
01355   CommandCost total_cost(EXPENSES_CONSTRUCTION);
01356 
01357   /* Do the action for every tile into the area */
01358   TILE_AREA_LOOP(tile, ta) {
01359     /* Make sure the specified tile is a rail station */
01360     if (!HasStationTileRail(tile)) continue;
01361 
01362     /* If there is a vehicle on ground, do not allow to remove (flood) the tile */
01363     CommandCost ret = EnsureNoVehicleOnGround(tile);
01364     if (ret.Failed()) continue;
01365 
01366     /* Check ownership of station */
01367     T *st = T::GetByTile(tile);
01368     if (st == NULL) continue;
01369 
01370     if (_current_company != OWNER_WATER) {
01371       CommandCost ret = CheckOwnership(st->owner);
01372       if (ret.Failed()) continue;
01373     }
01374 
01375     /* If we reached here, the tile is valid so increase the quantity of tiles we will remove */
01376     quantity++;
01377 
01378     if (keep_rail || IsStationTileBlocked(tile)) {
01379       /* Don't refund the 'steel' of the track when we keep the
01380        *  rail, or when the tile didn't have any rail at all. */
01381       total_cost.AddCost(-_price[PR_CLEAR_RAIL]);
01382     }
01383 
01384     if (flags & DC_EXEC) {
01385       /* read variables before the station tile is removed */
01386       uint specindex = GetCustomStationSpecIndex(tile);
01387       Track track = GetRailStationTrack(tile);
01388       Owner owner = GetTileOwner(tile);
01389       RailType rt = GetRailType(tile);
01390       Train *v = NULL;
01391 
01392       if (HasStationReservation(tile)) {
01393         v = GetTrainForReservation(tile, track);
01394         if (v != NULL) {
01395           /* Free train reservation. */
01396           FreeTrainTrackReservation(v);
01397           if (IsRailStationTile(v->tile)) SetRailStationPlatformReservation(v->tile, TrackdirToExitdir(v->GetVehicleTrackdir()), false);
01398           Vehicle *temp = v;
01399           for (; temp->Next() != NULL; temp = temp->Next()) { }
01400           if (IsRailStationTile(temp->tile)) SetRailStationPlatformReservation(temp->tile, TrackdirToExitdir(ReverseTrackdir(temp->GetVehicleTrackdir())), false);
01401         }
01402       }
01403 
01404       bool build_rail = keep_rail && !IsStationTileBlocked(tile);
01405 
01406       DoClearSquare(tile);
01407       DeleteNewGRFInspectWindow(GSF_STATIONS, tile);
01408       if (build_rail) MakeRailNormal(tile, owner, TrackToTrackBits(track), rt);
01409 
01410       st->rect.AfterRemoveTile(st, tile);
01411       AddTrackToSignalBuffer(tile, track, owner);
01412       YapfNotifyTrackLayoutChange(tile, track);
01413 
01414       DeallocateSpecFromStation(st, specindex);
01415 
01416       affected_stations.Include(st);
01417 
01418       if (v != NULL) {
01419         /* Restore station reservation. */
01420         if (IsRailStationTile(v->tile)) SetRailStationPlatformReservation(v->tile, TrackdirToExitdir(v->GetVehicleTrackdir()), true);
01421         TryPathReserve(v, true, true);
01422         for (; v->Next() != NULL; v = v->Next()) { }
01423         if (IsRailStationTile(v->tile)) SetRailStationPlatformReservation(v->tile, TrackdirToExitdir(ReverseTrackdir(v->GetVehicleTrackdir())), true);
01424       }
01425     }
01426   }
01427 
01428   if (quantity == 0) return_cmd_error(STR_ERROR_THERE_IS_NO_STATION);
01429 
01430   for (T **stp = affected_stations.Begin(); stp != affected_stations.End(); stp++) {
01431     T *st = *stp;
01432 
01433     /* now we need to make the "spanned" area of the railway station smaller
01434      * if we deleted something at the edges.
01435      * we also need to adjust train_tile. */
01436     MakeRailStationAreaSmaller(st);
01437     UpdateStationSignCoord(st);
01438 
01439     /* if we deleted the whole station, delete the train facility. */
01440     if (st->train_station.tile == INVALID_TILE) {
01441       st->facilities &= ~FACIL_TRAIN;
01442       SetWindowWidgetDirty(WC_STATION_VIEW, st->index, SVW_TRAINS);
01443       st->UpdateVirtCoord();
01444       DeleteStationIfEmpty(st);
01445     }
01446   }
01447 
01448   total_cost.AddCost(quantity * removal_cost);
01449   return total_cost;
01450 }
01451 
01463 CommandCost CmdRemoveFromRailStation(TileIndex start, DoCommandFlag flags, uint32 p1, uint32 p2, const char *text)
01464 {
01465   TileIndex end = p1 == 0 ? start : p1;
01466   if (start >= MapSize() || end >= MapSize()) return CMD_ERROR;
01467 
01468   TileArea ta(start, end);
01469   SmallVector<Station *, 4> affected_stations;
01470 
01471   CommandCost ret = RemoveFromRailBaseStation(ta, affected_stations, flags, _price[PR_CLEAR_STATION_RAIL], HasBit(p2, 0));
01472   if (ret.Failed()) return ret;
01473 
01474   /* Do all station specific functions here. */
01475   for (Station **stp = affected_stations.Begin(); stp != affected_stations.End(); stp++) {
01476     Station *st = *stp;
01477 
01478     if (st->train_station.tile == INVALID_TILE) SetWindowWidgetDirty(WC_STATION_VIEW, st->index, SVW_TRAINS);
01479     st->MarkTilesDirty(false);
01480     st->RecomputeIndustriesNear();
01481   }
01482 
01483   /* Now apply the rail cost to the number that we deleted */
01484   return ret;
01485 }
01486 
01498 CommandCost CmdRemoveFromRailWaypoint(TileIndex start, DoCommandFlag flags, uint32 p1, uint32 p2, const char *text)
01499 {
01500   TileIndex end = p1 == 0 ? start : p1;
01501   if (start >= MapSize() || end >= MapSize()) return CMD_ERROR;
01502 
01503   TileArea ta(start, end);
01504   SmallVector<Waypoint *, 4> affected_stations;
01505 
01506   return RemoveFromRailBaseStation(ta, affected_stations, flags, _price[PR_CLEAR_WAYPOINT_RAIL], HasBit(p2, 0));
01507 }
01508 
01509 
01517 template <class T>
01518 CommandCost RemoveRailStation(T *st, DoCommandFlag flags)
01519 {
01520   /* Current company owns the station? */
01521   if (_current_company != OWNER_WATER) {
01522     CommandCost ret = CheckOwnership(st->owner);
01523     if (ret.Failed()) return ret;
01524   }
01525 
01526   /* determine width and height of platforms */
01527   TileArea ta = st->train_station;
01528 
01529   assert(ta.w != 0 && ta.h != 0);
01530 
01531   CommandCost cost(EXPENSES_CONSTRUCTION);
01532   /* clear all areas of the station */
01533   TILE_AREA_LOOP(tile, ta) {
01534     /* only remove tiles that are actually train station tiles */
01535     if (!st->TileBelongsToRailStation(tile)) continue;
01536 
01537     CommandCost ret = EnsureNoVehicleOnGround(tile);
01538     if (ret.Failed()) return ret;
01539 
01540     cost.AddCost(_price[PR_CLEAR_STATION_RAIL]);
01541     if (flags & DC_EXEC) {
01542       /* read variables before the station tile is removed */
01543       Track track = GetRailStationTrack(tile);
01544       Owner owner = GetTileOwner(tile); // _current_company can be OWNER_WATER
01545       Train *v = NULL;
01546       if (HasStationReservation(tile)) {
01547         v = GetTrainForReservation(tile, track);
01548         if (v != NULL) FreeTrainTrackReservation(v);
01549       }
01550       DoClearSquare(tile);
01551       DeleteNewGRFInspectWindow(GSF_STATIONS, tile);
01552       AddTrackToSignalBuffer(tile, track, owner);
01553       YapfNotifyTrackLayoutChange(tile, track);
01554       if (v != NULL) TryPathReserve(v, true);
01555     }
01556   }
01557 
01558   if (flags & DC_EXEC) {
01559     st->rect.AfterRemoveRect(st, st->train_station);
01560 
01561     st->train_station.Clear();
01562 
01563     st->facilities &= ~FACIL_TRAIN;
01564 
01565     free(st->speclist);
01566     st->num_specs = 0;
01567     st->speclist  = NULL;
01568     st->cached_anim_triggers = 0;
01569 
01570     SetWindowWidgetDirty(WC_STATION_VIEW, st->index, SVW_TRAINS);
01571     st->UpdateVirtCoord();
01572     DeleteStationIfEmpty(st);
01573   }
01574 
01575   return cost;
01576 }
01577 
01584 static CommandCost RemoveRailStation(TileIndex tile, DoCommandFlag flags)
01585 {
01586   /* if there is flooding, remove platforms tile by tile */
01587   if (_current_company == OWNER_WATER) {
01588     return DoCommand(tile, 0, 0, DC_EXEC, CMD_REMOVE_FROM_RAIL_STATION);
01589   }
01590 
01591   Station *st = Station::GetByTile(tile);
01592   CommandCost cost = RemoveRailStation(st, flags);
01593 
01594   if (flags & DC_EXEC) st->RecomputeIndustriesNear();
01595 
01596   return cost;
01597 }
01598 
01605 static CommandCost RemoveRailWaypoint(TileIndex tile, DoCommandFlag flags)
01606 {
01607   /* if there is flooding, remove waypoints tile by tile */
01608   if (_current_company == OWNER_WATER) {
01609     return DoCommand(tile, 0, 0, DC_EXEC, CMD_REMOVE_FROM_RAIL_WAYPOINT);
01610   }
01611 
01612   return RemoveRailStation(Waypoint::GetByTile(tile), flags);
01613 }
01614 
01615 
01621 static RoadStop **FindRoadStopSpot(bool truck_station, Station *st)
01622 {
01623   RoadStop **primary_stop = (truck_station) ? &st->truck_stops : &st->bus_stops;
01624 
01625   if (*primary_stop == NULL) {
01626     /* we have no roadstop of the type yet, so write a "primary stop" */
01627     return primary_stop;
01628   } else {
01629     /* there are stops already, so append to the end of the list */
01630     RoadStop *stop = *primary_stop;
01631     while (stop->next != NULL) stop = stop->next;
01632     return &stop->next;
01633   }
01634 }
01635 
01636 static CommandCost RemoveRoadStop(TileIndex tile, DoCommandFlag flags);
01637 
01647 static CommandCost FindJoiningRoadStop(StationID existing_stop, StationID station_to_join, bool adjacent, TileArea ta, Station **st)
01648 {
01649   return FindJoiningBaseStation<Station, STR_ERROR_MUST_REMOVE_ROAD_STOP_FIRST>(existing_stop, station_to_join, adjacent, ta, st);
01650 }
01651 
01667 CommandCost CmdBuildRoadStop(TileIndex tile, DoCommandFlag flags, uint32 p1, uint32 p2, const char *text)
01668 {
01669   bool type = HasBit(p2, 0);
01670   bool is_drive_through = HasBit(p2, 1);
01671   RoadTypes rts = Extract<RoadTypes, 2, 2>(p2);
01672   StationID station_to_join = GB(p2, 16, 16);
01673   bool reuse = (station_to_join != NEW_STATION);
01674   if (!reuse) station_to_join = INVALID_STATION;
01675   bool distant_join = (station_to_join != INVALID_STATION);
01676 
01677   uint8 width = (uint8)GB(p1, 0, 8);
01678   uint8 lenght = (uint8)GB(p1, 8, 8);
01679 
01680   /* Check if the requested road stop is too big */
01681   if (width > _settings_game.station.station_spread || lenght > _settings_game.station.station_spread) return_cmd_error(STR_ERROR_STATION_TOO_SPREAD_OUT);
01682   /* Check for incorrect width / lenght. */
01683   if (width == 0 || lenght == 0) return CMD_ERROR;
01684   /* Check if the first tile and the last tile are valid */
01685   if (!IsValidTile(tile) || TileAddWrap(tile, width - 1, lenght - 1) == INVALID_TILE) return CMD_ERROR;
01686 
01687   TileArea roadstop_area(tile, width, lenght);
01688 
01689   if (distant_join && (!_settings_game.station.distant_join_stations || !Station::IsValidID(station_to_join))) return CMD_ERROR;
01690 
01691   if (!HasExactlyOneBit(rts) || !HasRoadTypesAvail(_current_company, rts)) return CMD_ERROR;
01692 
01693   /* Trams only have drive through stops */
01694   if (!is_drive_through && HasBit(rts, ROADTYPE_TRAM)) return CMD_ERROR;
01695 
01696   DiagDirection ddir = Extract<DiagDirection, 6, 2>(p2);
01697 
01698   /* Safeguard the parameters. */
01699   if (!IsValidDiagDirection(ddir)) return CMD_ERROR;
01700   /* If it is a drive-through stop, check for valid axis. */
01701   if (is_drive_through && !IsValidAxis((Axis)ddir)) return CMD_ERROR;
01702 
01703   CommandCost ret = CheckIfAuthorityAllowsNewStation(tile, flags);
01704   if (ret.Failed()) return ret;
01705 
01706   /* Total road stop cost. */
01707   CommandCost cost(EXPENSES_CONSTRUCTION, roadstop_area.w * roadstop_area.h * _price[type ? PR_BUILD_STATION_TRUCK : PR_BUILD_STATION_BUS]);
01708   StationID est = INVALID_STATION;
01709   ret = CheckFlatLandRoadStop(roadstop_area, flags, is_drive_through ? 5 << ddir : 1 << ddir, is_drive_through, type, DiagDirToAxis(ddir), &est, rts);
01710   if (ret.Failed()) return ret;
01711   cost.AddCost(ret);
01712 
01713   Station *st = NULL;
01714   ret = FindJoiningRoadStop(est, station_to_join, HasBit(p2, 5), roadstop_area, &st);
01715   if (ret.Failed()) return ret;
01716 
01717   /* Find a deleted station close to us */
01718   if (st == NULL && reuse) st = GetClosestDeletedStation(tile);
01719 
01720   /* Check if this number of road stops can be allocated. */
01721   if (!RoadStop::CanAllocateItem(roadstop_area.w * roadstop_area.h)) return_cmd_error(type ? STR_ERROR_TOO_MANY_TRUCK_STOPS : STR_ERROR_TOO_MANY_BUS_STOPS);
01722 
01723   if (st != NULL) {
01724     if (st->owner != _current_company) {
01725       return_cmd_error(STR_ERROR_TOO_CLOSE_TO_ANOTHER_STATION);
01726     }
01727 
01728     CommandCost ret = st->rect.BeforeAddRect(roadstop_area.tile, roadstop_area.w, roadstop_area.h, StationRect::ADD_TEST);
01729     if (ret.Failed()) return ret;
01730   } else {
01731     /* allocate and initialize new station */
01732     if (!Station::CanAllocateItem()) return_cmd_error(STR_ERROR_TOO_MANY_STATIONS_LOADING);
01733 
01734     if (flags & DC_EXEC) {
01735       st = new Station(tile);
01736 
01737       st->town = ClosestTownFromTile(tile, UINT_MAX);
01738       st->string_id = GenerateStationName(st, tile, STATIONNAMING_ROAD);
01739 
01740       if (Company::IsValidID(_current_company)) {
01741         SetBit(st->town->have_ratings, _current_company);
01742       }
01743     }
01744   }
01745 
01746   if (flags & DC_EXEC) {
01747     /* Check every tile in the area. */
01748     TILE_AREA_LOOP(cur_tile, roadstop_area) {
01749       RoadTypes cur_rts = GetRoadTypes(cur_tile);
01750 
01751       if (IsTileType(cur_tile, MP_STATION) && IsRoadStop(cur_tile)) {
01752         RemoveRoadStop(cur_tile, flags);
01753       }
01754 
01755       RoadStop *road_stop = new RoadStop(cur_tile);
01756       /* Insert into linked list of RoadStops. */
01757       RoadStop **currstop = FindRoadStopSpot(type, st);
01758       *currstop = road_stop;
01759 
01760       if (type) {
01761         st->truck_station.Add(cur_tile);
01762       } else {
01763         st->bus_station.Add(cur_tile);
01764       }
01765 
01766       /* Initialize an empty station. */
01767       st->AddFacility((type) ? FACIL_TRUCK_STOP : FACIL_BUS_STOP, cur_tile);
01768 
01769       st->rect.BeforeAddTile(cur_tile, StationRect::ADD_TRY);
01770 
01771       RoadStopType rs_type = type ? ROADSTOP_TRUCK : ROADSTOP_BUS;
01772       if (is_drive_through) {
01773         Owner road_owner = HasBit(cur_rts, ROADTYPE_ROAD) ? GetRoadOwner(cur_tile, ROADTYPE_ROAD) : _current_company;
01774         Owner tram_owner = HasBit(cur_rts, ROADTYPE_TRAM) ? GetRoadOwner(cur_tile, ROADTYPE_TRAM) : _current_company;
01775         MakeDriveThroughRoadStop(cur_tile, st->owner, road_owner, tram_owner, st->index, rs_type, rts | cur_rts, DiagDirToAxis(ddir));
01776         road_stop->MakeDriveThrough();
01777       } else {
01778         MakeRoadStop(cur_tile, st->owner, st->index, rs_type, rts, ddir);
01779       }
01780 
01781       MarkTileDirtyByTile(cur_tile);
01782     }
01783   }
01784 
01785   if (st != NULL) {
01786     st->UpdateVirtCoord();
01787     UpdateStationAcceptance(st, false);
01788     st->RecomputeIndustriesNear();
01789     InvalidateWindowData(WC_SELECT_STATION, 0, 0);
01790     InvalidateWindowData(WC_STATION_LIST, st->owner, 0);
01791     SetWindowWidgetDirty(WC_STATION_VIEW, st->index, SVW_ROADVEHS);
01792   }
01793   return cost;
01794 }
01795 
01796 
01797 static Vehicle *ClearRoadStopStatusEnum(Vehicle *v, void *)
01798 {
01799   if (v->type == VEH_ROAD) {
01800     /* Okay... we are a road vehicle on a drive through road stop.
01801      * But that road stop has just been removed, so we need to make
01802      * sure we are in a valid state... however, vehicles can also
01803      * turn on road stop tiles, so only clear the 'road stop' state
01804      * bits and only when the state was 'in road stop', otherwise
01805      * we'll end up clearing the turn around bits. */
01806     RoadVehicle *rv = RoadVehicle::From(v);
01807     if (HasBit(rv->state, RVS_IN_DT_ROAD_STOP)) rv->state &= RVSB_ROAD_STOP_TRACKDIR_MASK;
01808   }
01809 
01810   return NULL;
01811 }
01812 
01813 
01820 static CommandCost RemoveRoadStop(TileIndex tile, DoCommandFlag flags)
01821 {
01822   Station *st = Station::GetByTile(tile);
01823 
01824   if (_current_company != OWNER_WATER) {
01825     CommandCost ret = CheckOwnership(st->owner);
01826     if (ret.Failed()) return ret;
01827   }
01828 
01829   bool is_truck = IsTruckStop(tile);
01830 
01831   RoadStop **primary_stop;
01832   RoadStop *cur_stop;
01833   if (is_truck) { // truck stop
01834     primary_stop = &st->truck_stops;
01835     cur_stop = RoadStop::GetByTile(tile, ROADSTOP_TRUCK);
01836   } else {
01837     primary_stop = &st->bus_stops;
01838     cur_stop = RoadStop::GetByTile(tile, ROADSTOP_BUS);
01839   }
01840 
01841   assert(cur_stop != NULL);
01842 
01843   /* don't do the check for drive-through road stops when company bankrupts */
01844   if (IsDriveThroughStopTile(tile) && (flags & DC_BANKRUPT)) {
01845     /* remove the 'going through road stop' status from all vehicles on that tile */
01846     if (flags & DC_EXEC) FindVehicleOnPos(tile, NULL, &ClearRoadStopStatusEnum);
01847   } else {
01848     CommandCost ret = EnsureNoVehicleOnGround(tile);
01849     if (ret.Failed()) return ret;
01850   }
01851 
01852   if (flags & DC_EXEC) {
01853     if (*primary_stop == cur_stop) {
01854       /* removed the first stop in the list */
01855       *primary_stop = cur_stop->next;
01856       /* removed the only stop? */
01857       if (*primary_stop == NULL) {
01858         st->facilities &= (is_truck ? ~FACIL_TRUCK_STOP : ~FACIL_BUS_STOP);
01859       }
01860     } else {
01861       /* tell the predecessor in the list to skip this stop */
01862       RoadStop *pred = *primary_stop;
01863       while (pred->next != cur_stop) pred = pred->next;
01864       pred->next = cur_stop->next;
01865     }
01866 
01867     if (IsDriveThroughStopTile(tile)) {
01868       /* Clears the tile for us */
01869       cur_stop->ClearDriveThrough();
01870     } else {
01871       DoClearSquare(tile);
01872     }
01873 
01874     SetWindowWidgetDirty(WC_STATION_VIEW, st->index, SVW_ROADVEHS);
01875     delete cur_stop;
01876 
01877     /* Make sure no vehicle is going to the old roadstop */
01878     RoadVehicle *v;
01879     FOR_ALL_ROADVEHICLES(v) {
01880       if (v->First() == v && v->current_order.IsType(OT_GOTO_STATION) &&
01881           v->dest_tile == tile) {
01882         v->dest_tile = v->GetOrderStationLocation(st->index);
01883       }
01884     }
01885 
01886     st->rect.AfterRemoveTile(st, tile);
01887 
01888     st->UpdateVirtCoord();
01889     st->RecomputeIndustriesNear();
01890     DeleteStationIfEmpty(st);
01891 
01892     /* Update the tile area of the truck/bus stop */
01893     if (is_truck) {
01894       st->truck_station.Clear();
01895       for (const RoadStop *rs = st->truck_stops; rs != NULL; rs = rs->next) st->truck_station.Add(rs->xy);
01896     } else {
01897       st->bus_station.Clear();
01898       for (const RoadStop *rs = st->bus_stops; rs != NULL; rs = rs->next) st->bus_station.Add(rs->xy);
01899     }
01900   }
01901 
01902   return CommandCost(EXPENSES_CONSTRUCTION, _price[is_truck ? PR_CLEAR_STATION_TRUCK : PR_CLEAR_STATION_BUS]);
01903 }
01904 
01915 CommandCost CmdRemoveRoadStop(TileIndex tile, DoCommandFlag flags, uint32 p1, uint32 p2, const char *text)
01916 {
01917   uint8 width = (uint8)GB(p1, 0, 8);
01918   uint8 height = (uint8)GB(p1, 8, 8);
01919 
01920   /* Check for incorrect width / height. */
01921   if (width == 0 || height == 0) return CMD_ERROR;
01922   /* Check if the first tile and the last tile are valid */
01923   if (!IsValidTile(tile) || TileAddWrap(tile, width - 1, height - 1) == INVALID_TILE) return CMD_ERROR;
01924 
01925   TileArea roadstop_area(tile, width, height);
01926 
01927   int quantity = 0;
01928   CommandCost cost(EXPENSES_CONSTRUCTION);
01929   TILE_AREA_LOOP(cur_tile, roadstop_area) {
01930     /* Make sure the specified tile is a road stop of the correct type */
01931     if (!IsTileType(cur_tile, MP_STATION) || !IsRoadStop(cur_tile) || (uint32)GetRoadStopType(cur_tile) != GB(p2, 0, 1)) continue;
01932 
01933     /* Save the stop info before it is removed */
01934     bool is_drive_through = IsDriveThroughStopTile(cur_tile);
01935     RoadTypes rts = GetRoadTypes(cur_tile);
01936     RoadBits road_bits = IsDriveThroughStopTile(cur_tile) ?
01937         ((GetRoadStopDir(cur_tile) == DIAGDIR_NE) ? ROAD_X : ROAD_Y) :
01938         DiagDirToRoadBits(GetRoadStopDir(cur_tile));
01939 
01940     Owner road_owner = GetRoadOwner(cur_tile, ROADTYPE_ROAD);
01941     Owner tram_owner = GetRoadOwner(cur_tile, ROADTYPE_TRAM);
01942     CommandCost ret = RemoveRoadStop(cur_tile, flags);
01943     if (ret.Failed()) return ret;
01944     cost.AddCost(ret);
01945 
01946     quantity++;
01947     /* If the stop was a drive-through stop replace the road */
01948     if ((flags & DC_EXEC) && is_drive_through) {
01949       MakeRoadNormal(cur_tile, road_bits, rts, ClosestTownFromTile(cur_tile, UINT_MAX)->index,
01950           road_owner, tram_owner);
01951     }
01952   }
01953 
01954   if (quantity == 0) return_cmd_error(STR_ERROR_THERE_IS_NO_STATION);
01955 
01956   return cost;
01957 }
01958 
01966 static uint GetMinimalAirportDistanceToTile(const AirportSpec *as, TileIndex town_tile, TileIndex airport_tile)
01967 {
01968   uint ttx = TileX(town_tile); // X, Y of town
01969   uint tty = TileY(town_tile);
01970 
01971   uint atx = TileX(airport_tile); // X, Y of northern airport corner
01972   uint aty = TileY(airport_tile);
01973 
01974   uint btx = TileX(airport_tile) + as->size_x - 1; // X, Y of southern corner
01975   uint bty = TileY(airport_tile) + as->size_y - 1;
01976 
01977   /* if ttx < atx, dx = atx - ttx
01978    * if atx <= ttx <= btx, dx = 0
01979    * else, dx = ttx - btx (similiar for dy) */
01980   uint dx = ttx < atx ? atx - ttx : (ttx <= btx ? 0 : ttx - btx);
01981   uint dy = tty < aty ? aty - tty : (tty <= bty ? 0 : tty - bty);
01982 
01983   return dx + dy;
01984 }
01985 
01995 uint8 GetAirportNoiseLevelForTown(const AirportSpec *as, TileIndex town_tile, TileIndex tile)
01996 {
01997   /* 0 cannot be accounted, and 1 is the lowest that can be reduced from town.
01998    * So no need to go any further*/
01999   if (as->noise_level < 2) return as->noise_level;
02000 
02001   uint distance = GetMinimalAirportDistanceToTile(as, town_tile, tile);
02002 
02003   /* The steps for measuring noise reduction are based on the "magical" (and arbitrary) 8 base distance
02004    * adding the town_council_tolerance 4 times, as a way to graduate, depending of the tolerance.
02005    * Basically, it says that the less tolerant a town is, the bigger the distance before
02006    * an actual decrease can be granted */
02007   uint8 town_tolerance_distance = 8 + (_settings_game.difficulty.town_council_tolerance * 4);
02008 
02009   /* now, we want to have the distance segmented using the distance judged bareable by town
02010    * This will give us the coefficient of reduction the distance provides. */
02011   uint noise_reduction = distance / town_tolerance_distance;
02012 
02013   /* If the noise reduction equals the airport noise itself, don't give it for free.
02014    * Otherwise, simply reduce the airport's level. */
02015   return noise_reduction >= as->noise_level ? 1 : as->noise_level - noise_reduction;
02016 }
02017 
02025 Town *AirportGetNearestTown(const AirportSpec *as, TileIndex airport_tile)
02026 {
02027   Town *t, *nearest = NULL;
02028   uint add = as->size_x + as->size_y - 2; // GetMinimalAirportDistanceToTile can differ from DistanceManhattan by this much
02029   uint mindist = UINT_MAX - add; // prevent overflow
02030   FOR_ALL_TOWNS(t) {
02031     if (DistanceManhattan(t->xy, airport_tile) < mindist + add) { // avoid calling GetMinimalAirportDistanceToTile too often
02032       uint dist = GetMinimalAirportDistanceToTile(as, t->xy, airport_tile);
02033       if (dist < mindist) {
02034         nearest = t;
02035         mindist = dist;
02036       }
02037     }
02038   }
02039 
02040   return nearest;
02041 }
02042 
02043 
02045 void UpdateAirportsNoise()
02046 {
02047   Town *t;
02048   const Station *st;
02049 
02050   FOR_ALL_TOWNS(t) t->noise_reached = 0;
02051 
02052   FOR_ALL_STATIONS(st) {
02053     if (st->airport.tile != INVALID_TILE) {
02054       const AirportSpec *as = st->airport.GetSpec();
02055       Town *nearest = AirportGetNearestTown(as, st->airport.tile);
02056       nearest->noise_reached += GetAirportNoiseLevelForTown(as, nearest->xy, st->airport.tile);
02057     }
02058   }
02059 }
02060 
02074 CommandCost CmdBuildAirport(TileIndex tile, DoCommandFlag flags, uint32 p1, uint32 p2, const char *text)
02075 {
02076   StationID station_to_join = GB(p2, 16, 16);
02077   bool reuse = (station_to_join != NEW_STATION);
02078   if (!reuse) station_to_join = INVALID_STATION;
02079   bool distant_join = (station_to_join != INVALID_STATION);
02080   byte airport_type = GB(p1, 0, 8);
02081   byte layout = GB(p1, 8, 8);
02082 
02083   if (distant_join && (!_settings_game.station.distant_join_stations || !Station::IsValidID(station_to_join))) return CMD_ERROR;
02084 
02085   if (airport_type >= NUM_AIRPORTS) return CMD_ERROR;
02086 
02087   CommandCost ret = CheckIfAuthorityAllowsNewStation(tile, flags);
02088   if (ret.Failed()) return ret;
02089 
02090   /* Check if a valid, buildable airport was chosen for construction */
02091   const AirportSpec *as = AirportSpec::Get(airport_type);
02092   if (!as->IsAvailable() || layout >= as->num_table) return CMD_ERROR;
02093 
02094   Direction rotation = as->rotation[layout];
02095   Town *t = ClosestTownFromTile(tile, UINT_MAX);
02096   int w = as->size_x;
02097   int h = as->size_y;
02098   if (rotation == DIR_E || rotation == DIR_W) Swap(w, h);
02099 
02100   if (w > _settings_game.station.station_spread || h > _settings_game.station.station_spread) {
02101     return_cmd_error(STR_ERROR_STATION_TOO_SPREAD_OUT);
02102   }
02103 
02104   CommandCost cost = CheckFlatLand(TileArea(tile, w, h), flags);
02105   if (cost.Failed()) return cost;
02106 
02107   /* The noise level is the noise from the airport and reduce it to account for the distance to the town center. */
02108   Town *nearest = AirportGetNearestTown(as, tile);
02109   uint newnoise_level = GetAirportNoiseLevelForTown(as, nearest->xy, tile);
02110 
02111   /* Check if local auth would allow a new airport */
02112   StringID authority_refuse_message = STR_NULL;
02113 
02114   if (_settings_game.economy.station_noise_level) {
02115     /* do not allow to build a new airport if this raise the town noise over the maximum allowed by town */
02116     if ((nearest->noise_reached + newnoise_level) > nearest->MaxTownNoise()) {
02117       authority_refuse_message = STR_ERROR_LOCAL_AUTHORITY_REFUSES_NOISE;
02118     }
02119   } else {
02120     uint num = 0;
02121     const Station *st;
02122     FOR_ALL_STATIONS(st) {
02123       if (st->town == t && (st->facilities & FACIL_AIRPORT) && st->airport.type != AT_OILRIG) num++;
02124     }
02125     if (num >= 2) {
02126       authority_refuse_message = STR_ERROR_LOCAL_AUTHORITY_REFUSES_AIRPORT;
02127     }
02128   }
02129 
02130   if (authority_refuse_message != STR_NULL) {
02131     SetDParam(0, t->index);
02132     return_cmd_error(authority_refuse_message);
02133   }
02134 
02135   Station *st = NULL;
02136   ret = FindJoiningStation(INVALID_STATION, station_to_join, HasBit(p2, 0), TileArea(tile, w, h), &st);
02137   if (ret.Failed()) return ret;
02138 
02139   /* Distant join */
02140   if (st == NULL && distant_join) st = Station::GetIfValid(station_to_join);
02141 
02142   /* Find a deleted station close to us */
02143   if (st == NULL && reuse) st = GetClosestDeletedStation(tile);
02144 
02145   if (st != NULL) {
02146     if (st->owner != _current_company) {
02147       return_cmd_error(STR_ERROR_TOO_CLOSE_TO_ANOTHER_STATION);
02148     }
02149 
02150     CommandCost ret = st->rect.BeforeAddRect(tile, w, h, StationRect::ADD_TEST);
02151     if (ret.Failed()) return ret;
02152 
02153     if (st->airport.tile != INVALID_TILE) {
02154       return_cmd_error(STR_ERROR_TOO_CLOSE_TO_ANOTHER_AIRPORT);
02155     }
02156   } else {
02157     /* allocate and initialize new station */
02158     if (!Station::CanAllocateItem()) return_cmd_error(STR_ERROR_TOO_MANY_STATIONS_LOADING);
02159 
02160     if (flags & DC_EXEC) {
02161       st = new Station(tile);
02162 
02163       st->town = t;
02164       st->string_id = GenerateStationName(st, tile, !(GetAirport(airport_type)->flags & AirportFTAClass::AIRPLANES) ? STATIONNAMING_HELIPORT : STATIONNAMING_AIRPORT);
02165 
02166       if (Company::IsValidID(_current_company)) {
02167         SetBit(st->town->have_ratings, _current_company);
02168       }
02169     }
02170   }
02171 
02172   const AirportTileTable *it = as->table[layout];
02173   do {
02174     cost.AddCost(_price[PR_BUILD_STATION_AIRPORT]);
02175   } while ((++it)->ti.x != -0x80);
02176 
02177   if (flags & DC_EXEC) {
02178     /* Always add the noise, so there will be no need to recalculate when option toggles */
02179     nearest->noise_reached += newnoise_level;
02180 
02181     st->AddFacility(FACIL_AIRPORT, tile);
02182     st->airport.type = airport_type;
02183     st->airport.layout = layout;
02184     st->airport.flags = 0;
02185     st->airport.rotation = rotation;
02186 
02187     st->rect.BeforeAddRect(tile, w, h, StationRect::ADD_TRY);
02188 
02189     it = as->table[layout];
02190     do {
02191       TileIndex cur_tile = tile + ToTileIndexDiff(it->ti);
02192       MakeAirport(cur_tile, st->owner, st->index, it->gfx, WATER_CLASS_INVALID);
02193       SetStationTileRandomBits(cur_tile, GB(Random(), 0, 4));
02194       st->airport.Add(cur_tile);
02195 
02196       if (AirportTileSpec::Get(GetTranslatedAirportTileID(it->gfx))->animation.status != ANIM_STATUS_NO_ANIMATION) AddAnimatedTile(cur_tile);
02197     } while ((++it)->ti.x != -0x80);
02198 
02199     /* Only call the animation trigger after all tiles have been built */
02200     it = as->table[layout];
02201     do {
02202       TileIndex cur_tile = tile + ToTileIndexDiff(it->ti);
02203       AirportTileAnimationTrigger(st, cur_tile, AAT_BUILT);
02204     } while ((++it)->ti.x != -0x80);
02205 
02206     UpdateAirplanesOnNewStation(st);
02207 
02208     st->UpdateVirtCoord();
02209     UpdateStationAcceptance(st, false);
02210     st->RecomputeIndustriesNear();
02211     InvalidateWindowData(WC_SELECT_STATION, 0, 0);
02212     InvalidateWindowData(WC_STATION_LIST, st->owner, 0);
02213     SetWindowWidgetDirty(WC_STATION_VIEW, st->index, SVW_PLANES);
02214 
02215     if (_settings_game.economy.station_noise_level) {
02216       SetWindowDirty(WC_TOWN_VIEW, st->town->index);
02217     }
02218   }
02219 
02220   return cost;
02221 }
02222 
02229 static CommandCost RemoveAirport(TileIndex tile, DoCommandFlag flags)
02230 {
02231   Station *st = Station::GetByTile(tile);
02232 
02233   if (_current_company != OWNER_WATER) {
02234     CommandCost ret = CheckOwnership(st->owner);
02235     if (ret.Failed()) return ret;
02236   }
02237 
02238   tile = st->airport.tile;
02239 
02240   CommandCost cost(EXPENSES_CONSTRUCTION);
02241 
02242   const Aircraft *a;
02243   FOR_ALL_AIRCRAFT(a) {
02244     if (!a->IsNormalAircraft()) continue;
02245     if (a->targetairport == st->index && a->state != FLYING) return CMD_ERROR;
02246   }
02247 
02248   TILE_AREA_LOOP(tile_cur, st->airport) {
02249     if (!st->TileBelongsToAirport(tile_cur)) continue;
02250 
02251     CommandCost ret = EnsureNoVehicleOnGround(tile_cur);
02252     if (ret.Failed()) return ret;
02253 
02254     cost.AddCost(_price[PR_CLEAR_STATION_AIRPORT]);
02255 
02256     if (flags & DC_EXEC) {
02257       if (IsHangarTile(tile_cur)) OrderBackup::Reset(tile_cur, false);
02258       DeleteAnimatedTile(tile_cur);
02259       DoClearSquare(tile_cur);
02260       DeleteNewGRFInspectWindow(GSF_AIRPORTTILES, tile_cur);
02261     }
02262   }
02263 
02264   if (flags & DC_EXEC) {
02265     const AirportSpec *as = st->airport.GetSpec();
02266     for (uint i = 0; i < st->airport.GetNumHangars(); ++i) {
02267       DeleteWindowById(
02268         WC_VEHICLE_DEPOT, st->airport.GetHangarTile(i)
02269       );
02270     }
02271 
02272     /* The noise level is the noise from the airport and reduce it to account for the distance to the town center.
02273      * And as for construction, always remove it, even if the setting is not set, in order to avoid the
02274      * need of recalculation */
02275     Town *nearest = AirportGetNearestTown(as, tile);
02276     nearest->noise_reached -= GetAirportNoiseLevelForTown(as, nearest->xy, tile);
02277 
02278     st->rect.AfterRemoveRect(st, st->airport);
02279 
02280     st->airport.Clear();
02281     st->facilities &= ~FACIL_AIRPORT;
02282 
02283     SetWindowWidgetDirty(WC_STATION_VIEW, st->index, SVW_PLANES);
02284 
02285     if (_settings_game.economy.station_noise_level) {
02286       SetWindowDirty(WC_TOWN_VIEW, st->town->index);
02287     }
02288 
02289     st->UpdateVirtCoord();
02290     st->RecomputeIndustriesNear();
02291     DeleteStationIfEmpty(st);
02292     DeleteNewGRFInspectWindow(GSF_AIRPORTS, st->index);
02293   }
02294 
02295   return cost;
02296 }
02297 
02304 bool HasStationInUse(StationID station, bool include_company, CompanyID company)
02305 {
02306   const Vehicle *v;
02307   FOR_ALL_VEHICLES(v) {
02308     if ((v->owner == company) == include_company) {
02309       const Order *order;
02310       FOR_VEHICLE_ORDERS(v, order) {
02311         if ((order->IsType(OT_GOTO_STATION) || order->IsType(OT_GOTO_WAYPOINT)) && order->GetDestination() == station) {
02312           return true;
02313         }
02314       }
02315     }
02316   }
02317   return false;
02318 }
02319 
02320 static const TileIndexDiffC _dock_tileoffs_chkaround[] = {
02321   {-1,  0},
02322   { 0,  0},
02323   { 0,  0},
02324   { 0, -1}
02325 };
02326 static const byte _dock_w_chk[4] = { 2, 1, 2, 1 };
02327 static const byte _dock_h_chk[4] = { 1, 2, 1, 2 };
02328 
02338 CommandCost CmdBuildDock(TileIndex tile, DoCommandFlag flags, uint32 p1, uint32 p2, const char *text)
02339 {
02340   StationID station_to_join = GB(p2, 16, 16);
02341   bool reuse = (station_to_join != NEW_STATION);
02342   if (!reuse) station_to_join = INVALID_STATION;
02343   bool distant_join = (station_to_join != INVALID_STATION);
02344 
02345   if (distant_join && (!_settings_game.station.distant_join_stations || !Station::IsValidID(station_to_join))) return CMD_ERROR;
02346 
02347   DiagDirection direction = GetInclinedSlopeDirection(GetTileSlope(tile, NULL));
02348   if (direction == INVALID_DIAGDIR) return_cmd_error(STR_ERROR_SITE_UNSUITABLE);
02349   direction = ReverseDiagDir(direction);
02350 
02351   /* Docks cannot be placed on rapids */
02352   if (HasTileWaterGround(tile)) return_cmd_error(STR_ERROR_SITE_UNSUITABLE);
02353 
02354   CommandCost ret = CheckIfAuthorityAllowsNewStation(tile, flags);
02355   if (ret.Failed()) return ret;
02356 
02357   if (MayHaveBridgeAbove(tile) && IsBridgeAbove(tile)) return_cmd_error(STR_ERROR_MUST_DEMOLISH_BRIDGE_FIRST);
02358 
02359   ret = DoCommand(tile, 0, 0, flags, CMD_LANDSCAPE_CLEAR);
02360   if (ret.Failed()) return ret;
02361 
02362   TileIndex tile_cur = tile + TileOffsByDiagDir(direction);
02363 
02364   if (!IsTileType(tile_cur, MP_WATER) || GetTileSlope(tile_cur, NULL) != SLOPE_FLAT) {
02365     return_cmd_error(STR_ERROR_SITE_UNSUITABLE);
02366   }
02367 
02368   if (MayHaveBridgeAbove(tile_cur) && IsBridgeAbove(tile_cur)) return_cmd_error(STR_ERROR_MUST_DEMOLISH_BRIDGE_FIRST);
02369 
02370   /* Get the water class of the water tile before it is cleared.*/
02371   WaterClass wc = GetWaterClass(tile_cur);
02372 
02373   ret = DoCommand(tile_cur, 0, 0, flags, CMD_LANDSCAPE_CLEAR);
02374   if (ret.Failed()) return ret;
02375 
02376   tile_cur += TileOffsByDiagDir(direction);
02377   if (!IsTileType(tile_cur, MP_WATER) || GetTileSlope(tile_cur, NULL) != SLOPE_FLAT) {
02378     return_cmd_error(STR_ERROR_SITE_UNSUITABLE);
02379   }
02380 
02381   /* middle */
02382   Station *st = NULL;
02383   ret = FindJoiningStation(INVALID_STATION, station_to_join, HasBit(p1, 0),
02384       TileArea(tile + ToTileIndexDiff(_dock_tileoffs_chkaround[direction]),
02385           _dock_w_chk[direction], _dock_h_chk[direction]), &st);
02386   if (ret.Failed()) return ret;
02387 
02388   /* Distant join */
02389   if (st == NULL && distant_join) st = Station::GetIfValid(station_to_join);
02390 
02391   /* Find a deleted station close to us */
02392   if (st == NULL && reuse) st = GetClosestDeletedStation(tile);
02393 
02394   if (st != NULL) {
02395     if (st->owner != _current_company) {
02396       return_cmd_error(STR_ERROR_TOO_CLOSE_TO_ANOTHER_STATION);
02397     }
02398 
02399     CommandCost ret = st->rect.BeforeAddRect(
02400         tile + ToTileIndexDiff(_dock_tileoffs_chkaround[direction]),
02401         _dock_w_chk[direction], _dock_h_chk[direction], StationRect::ADD_TEST);
02402     if (ret.Failed()) return ret;
02403 
02404     if (st->dock_tile != INVALID_TILE) return_cmd_error(STR_ERROR_TOO_CLOSE_TO_ANOTHER_DOCK);
02405   } else {
02406     /* allocate and initialize new station */
02407     if (!Station::CanAllocateItem()) return_cmd_error(STR_ERROR_TOO_MANY_STATIONS_LOADING);
02408 
02409     if (flags & DC_EXEC) {
02410       st = new Station(tile);
02411 
02412       st->town = ClosestTownFromTile(tile, UINT_MAX);
02413       st->string_id = GenerateStationName(st, tile, STATIONNAMING_DOCK);
02414 
02415       if (Company::IsValidID(_current_company)) {
02416         SetBit(st->town->have_ratings, _current_company);
02417       }
02418     }
02419   }
02420 
02421   if (flags & DC_EXEC) {
02422     st->dock_tile = tile;
02423     st->AddFacility(FACIL_DOCK, tile);
02424 
02425     st->rect.BeforeAddRect(
02426         tile + ToTileIndexDiff(_dock_tileoffs_chkaround[direction]),
02427         _dock_w_chk[direction], _dock_h_chk[direction], StationRect::ADD_TRY);
02428 
02429     MakeDock(tile, st->owner, st->index, direction, wc);
02430 
02431     st->UpdateVirtCoord();
02432     UpdateStationAcceptance(st, false);
02433     st->RecomputeIndustriesNear();
02434     InvalidateWindowData(WC_SELECT_STATION, 0, 0);
02435     InvalidateWindowData(WC_STATION_LIST, st->owner, 0);
02436     SetWindowWidgetDirty(WC_STATION_VIEW, st->index, SVW_SHIPS);
02437   }
02438 
02439   return CommandCost(EXPENSES_CONSTRUCTION, _price[PR_BUILD_STATION_DOCK]);
02440 }
02441 
02448 static CommandCost RemoveDock(TileIndex tile, DoCommandFlag flags)
02449 {
02450   Station *st = Station::GetByTile(tile);
02451   CommandCost ret = CheckOwnership(st->owner);
02452   if (ret.Failed()) return ret;
02453 
02454   TileIndex tile1 = st->dock_tile;
02455   TileIndex tile2 = tile1 + TileOffsByDiagDir(GetDockDirection(tile1));
02456 
02457   ret = EnsureNoVehicleOnGround(tile1);
02458   if (ret.Succeeded()) ret = EnsureNoVehicleOnGround(tile2);
02459   if (ret.Failed()) return ret;
02460 
02461   if (flags & DC_EXEC) {
02462     DoClearSquare(tile1);
02463     MarkTileDirtyByTile(tile1);
02464     MakeWaterKeepingClass(tile2, st->owner);
02465 
02466     st->rect.AfterRemoveTile(st, tile1);
02467     st->rect.AfterRemoveTile(st, tile2);
02468 
02469     st->dock_tile = INVALID_TILE;
02470     st->facilities &= ~FACIL_DOCK;
02471 
02472     SetWindowWidgetDirty(WC_STATION_VIEW, st->index, SVW_SHIPS);
02473     st->UpdateVirtCoord();
02474     st->RecomputeIndustriesNear();
02475     DeleteStationIfEmpty(st);
02476   }
02477 
02478   return CommandCost(EXPENSES_CONSTRUCTION, _price[PR_CLEAR_STATION_DOCK]);
02479 }
02480 
02481 #include "table/station_land.h"
02482 
02483 const DrawTileSprites *GetStationTileLayout(StationType st, byte gfx)
02484 {
02485   return &_station_display_datas[st][gfx];
02486 }
02487 
02488 static void DrawTile_Station(TileInfo *ti)
02489 {
02490   const DrawTileSprites *t = NULL;
02491   RoadTypes roadtypes;
02492   int32 total_offset;
02493   int32 custom_ground_offset;
02494   const RailtypeInfo *rti = NULL;
02495   uint32 relocation = 0;
02496   const BaseStation *st = NULL;
02497   const StationSpec *statspec = NULL;
02498 
02499   if (HasStationRail(ti->tile)) {
02500     rti = GetRailTypeInfo(GetRailType(ti->tile));
02501     roadtypes = ROADTYPES_NONE;
02502     total_offset = rti->total_offset;
02503     custom_ground_offset = rti->custom_ground_offset;
02504 
02505     if (IsCustomStationSpecIndex(ti->tile)) {
02506       /* look for customization */
02507       st = BaseStation::GetByTile(ti->tile);
02508       statspec = st->speclist[GetCustomStationSpecIndex(ti->tile)].spec;
02509 
02510       if (statspec != NULL) {
02511         uint tile = GetStationGfx(ti->tile);
02512 
02513         relocation = GetCustomStationRelocation(statspec, st, ti->tile);
02514 
02515         if (HasBit(statspec->callback_mask, CBM_STATION_SPRITE_LAYOUT)) {
02516           uint16 callback = GetStationCallback(CBID_STATION_SPRITE_LAYOUT, 0, 0, statspec, st, ti->tile);
02517           if (callback != CALLBACK_FAILED) tile = (callback & ~1) + GetRailStationAxis(ti->tile);
02518         }
02519 
02520         /* Ensure the chosen tile layout is valid for this custom station */
02521         if (statspec->renderdata != NULL) {
02522           t = &statspec->renderdata[tile < statspec->tiles ? tile : (uint)GetRailStationAxis(ti->tile)];
02523         }
02524       }
02525     }
02526   } else {
02527     roadtypes = IsRoadStop(ti->tile) ? GetRoadTypes(ti->tile) : ROADTYPES_NONE;
02528     total_offset = 0;
02529     custom_ground_offset = 0;
02530   }
02531 
02532   if (IsAirport(ti->tile)) {
02533     StationGfx gfx = GetAirportGfx(ti->tile);
02534     if (gfx >= NEW_AIRPORTTILE_OFFSET) {
02535       const AirportTileSpec *ats = AirportTileSpec::Get(gfx);
02536       if (ats->grf_prop.spritegroup[0] != NULL && DrawNewAirportTile(ti, Station::GetByTile(ti->tile), gfx, ats)) {
02537         return;
02538       }
02539       /* No sprite group (or no valid one) found, meaning no graphics associated.
02540        * Use the substitute one instead */
02541       assert(ats->grf_prop.subst_id != INVALID_AIRPORTTILE);
02542       gfx = ats->grf_prop.subst_id;
02543     }
02544     switch (gfx) {
02545       case APT_RADAR_GRASS_FENCE_SW:
02546         t = &_station_display_datas_airport_radar_grass_fence_sw[GetAnimationFrame(ti->tile)];
02547         break;
02548       case APT_GRASS_FENCE_NE_FLAG:
02549         t = &_station_display_datas_airport_flag_grass_fence_ne[GetAnimationFrame(ti->tile)];
02550         break;
02551       case APT_RADAR_FENCE_SW:
02552         t = &_station_display_datas_airport_radar_fence_sw[GetAnimationFrame(ti->tile)];
02553         break;
02554       case APT_RADAR_FENCE_NE:
02555         t = &_station_display_datas_airport_radar_fence_ne[GetAnimationFrame(ti->tile)];
02556         break;
02557       case APT_GRASS_FENCE_NE_FLAG_2:
02558         t = &_station_display_datas_airport_flag_grass_fence_ne_2[GetAnimationFrame(ti->tile)];
02559         break;
02560     }
02561   }
02562 
02563   Owner owner = GetTileOwner(ti->tile);
02564 
02565   PaletteID palette;
02566   if (Company::IsValidID(owner)) {
02567     palette = COMPANY_SPRITE_COLOUR(owner);
02568   } else {
02569     /* Some stations are not owner by a company, namely oil rigs */
02570     palette = PALETTE_TO_GREY;
02571   }
02572 
02573   if (t == NULL || t->seq == NULL) t = GetStationTileLayout(GetStationType(ti->tile), GetStationGfx(ti->tile));
02574 
02575   /* don't show foundation for docks */
02576   if (ti->tileh != SLOPE_FLAT && !IsDock(ti->tile)) {
02577     if (statspec != NULL && HasBit(statspec->flags, SSF_CUSTOM_FOUNDATIONS)) {
02578       /* Station has custom foundations. */
02579       SpriteID image = GetCustomStationFoundationRelocation(statspec, st, ti->tile);
02580 
02581       if (HasBit(statspec->flags, SSF_EXTENDED_FOUNDATIONS)) {
02582         /* Station provides extended foundations. */
02583 
02584         static const uint8 foundation_parts[] = {
02585           0, 0, 0, 0, // Invalid,  Invalid,   Invalid,   SLOPE_SW
02586           0, 1, 2, 3, // Invalid,  SLOPE_EW,  SLOPE_SE,  SLOPE_WSE
02587           0, 4, 5, 6, // Invalid,  SLOPE_NW,  SLOPE_NS,  SLOPE_NWS
02588           7, 8, 9     // SLOPE_NE, SLOPE_ENW, SLOPE_SEN
02589         };
02590 
02591         AddSortableSpriteToDraw(image + foundation_parts[ti->tileh], PAL_NONE, ti->x, ti->y, 16, 16, 7, ti->z);
02592       } else {
02593         /* Draw simple foundations, built up from 8 possible foundation sprites. */
02594 
02595         /* Each set bit represents one of the eight composite sprites to be drawn.
02596          * 'Invalid' entries will not drawn but are included for completeness. */
02597         static const uint8 composite_foundation_parts[] = {
02598           /* Invalid  (00000000), Invalid   (11010001), Invalid   (11100100), SLOPE_SW  (11100000) */
02599              0x00,                0xD1,                 0xE4,                 0xE0,
02600           /* Invalid  (11001010), SLOPE_EW  (11001001), SLOPE_SE  (11000100), SLOPE_WSE (11000000) */
02601              0xCA,                0xC9,                 0xC4,                 0xC0,
02602           /* Invalid  (11010010), SLOPE_NW  (10010001), SLOPE_NS  (11100100), SLOPE_NWS (10100000) */
02603              0xD2,                0x91,                 0xE4,                 0xA0,
02604           /* SLOPE_NE (01001010), SLOPE_ENW (00001001), SLOPE_SEN (01000100) */
02605              0x4A,                0x09,                 0x44
02606         };
02607 
02608         uint8 parts = composite_foundation_parts[ti->tileh];
02609 
02610         /* If foundations continue beyond the tile's upper sides then
02611          * mask out the last two pieces. */
02612         uint z;
02613         Slope slope = GetFoundationSlope(ti->tile, &z);
02614         if (!HasFoundationNW(ti->tile, slope, z)) ClrBit(parts, 6);
02615         if (!HasFoundationNE(ti->tile, slope, z)) ClrBit(parts, 7);
02616 
02617         if (parts == 0) {
02618           /* We always have to draw at least one sprite to make sure there is a boundingbox and a sprite with the
02619            * correct offset for the childsprites.
02620            * So, draw the (completely empty) sprite of the default foundations. */
02621           goto draw_default_foundation;
02622         }
02623 
02624         StartSpriteCombine();
02625         for (int i = 0; i < 8; i++) {
02626           if (HasBit(parts, i)) {
02627             AddSortableSpriteToDraw(image + i, PAL_NONE, ti->x, ti->y, 16, 16, 7, ti->z);
02628           }
02629         }
02630         EndSpriteCombine();
02631       }
02632 
02633       OffsetGroundSprite(31, 1);
02634       ti->z += ApplyFoundationToSlope(FOUNDATION_LEVELED, &ti->tileh);
02635     } else {
02636 draw_default_foundation:
02637       DrawFoundation(ti, FOUNDATION_LEVELED);
02638     }
02639   }
02640 
02641   if (IsBuoy(ti->tile) || IsDock(ti->tile) || (IsOilRig(ti->tile) && IsTileOnWater(ti->tile))) {
02642     if (ti->tileh == SLOPE_FLAT) {
02643       DrawWaterClassGround(ti);
02644     } else {
02645       assert(IsDock(ti->tile));
02646       TileIndex water_tile = ti->tile + TileOffsByDiagDir(GetDockDirection(ti->tile));
02647       WaterClass wc = GetWaterClass(water_tile);
02648       if (wc == WATER_CLASS_SEA) {
02649         DrawShoreTile(ti->tileh);
02650       } else {
02651         DrawClearLandTile(ti, 3);
02652       }
02653     }
02654   } else {
02655     SpriteID image = t->ground.sprite;
02656     PaletteID pal  = t->ground.pal;
02657     if (rti != NULL && rti->UsesOverlay() && (image == SPR_RAIL_TRACK_X || image == SPR_RAIL_TRACK_Y)) {
02658       SpriteID ground = GetCustomRailSprite(rti, ti->tile, RTSG_GROUND);
02659       DrawGroundSprite(SPR_FLAT_GRASS_TILE, PAL_NONE);
02660       DrawGroundSprite(ground + (image == SPR_RAIL_TRACK_X ? RTO_X : RTO_Y), PAL_NONE);
02661 
02662       if (_game_mode != GM_MENU && _settings_client.gui.show_track_reservation && HasStationReservation(ti->tile)) {
02663         SpriteID overlay = GetCustomRailSprite(rti, ti->tile, RTSG_OVERLAY);
02664         DrawGroundSprite(overlay + (image == SPR_RAIL_TRACK_X ? RTO_X : RTO_Y), PALETTE_CRASH);
02665       }
02666     } else {
02667       if (HasBit(image, SPRITE_MODIFIER_CUSTOM_SPRITE)) {
02668         image += GetCustomStationGroundRelocation(statspec, st, ti->tile);
02669         image += custom_ground_offset;
02670       } else {
02671         image += total_offset;
02672       }
02673       DrawGroundSprite(image, GroundSpritePaletteTransform(image, pal, palette));
02674 
02675       /* PBS debugging, draw reserved tracks darker */
02676       if (_game_mode != GM_MENU && _settings_client.gui.show_track_reservation && HasStationRail(ti->tile) && HasStationReservation(ti->tile)) {
02677         const RailtypeInfo *rti = GetRailTypeInfo(GetRailType(ti->tile));
02678         DrawGroundSprite(GetRailStationAxis(ti->tile) == AXIS_X ? rti->base_sprites.single_x : rti->base_sprites.single_y, PALETTE_CRASH);
02679       }
02680     }
02681   }
02682 
02683   if (HasStationRail(ti->tile) && HasCatenaryDrawn(GetRailType(ti->tile)) && IsStationTileElectrifiable(ti->tile)) DrawCatenary(ti);
02684 
02685   if (HasBit(roadtypes, ROADTYPE_TRAM)) {
02686     Axis axis = GetRoadStopDir(ti->tile) == DIAGDIR_NE ? AXIS_X : AXIS_Y;
02687     DrawGroundSprite((HasBit(roadtypes, ROADTYPE_ROAD) ? SPR_TRAMWAY_OVERLAY : SPR_TRAMWAY_TRAM) + (axis ^ 1), PAL_NONE);
02688     DrawTramCatenary(ti, axis == AXIS_X ? ROAD_X : ROAD_Y);
02689   }
02690 
02691   if (IsRailWaypoint(ti->tile)) {
02692     /* Don't offset the waypoint graphics; they're always the same. */
02693     total_offset = 0;
02694   }
02695 
02696   DrawRailTileSeq(ti, t, TO_BUILDINGS, total_offset, relocation, palette);
02697 }
02698 
02699 void StationPickerDrawSprite(int x, int y, StationType st, RailType railtype, RoadType roadtype, int image)
02700 {
02701   int32 total_offset = 0;
02702   PaletteID pal = COMPANY_SPRITE_COLOUR(_local_company);
02703   const DrawTileSprites *t = GetStationTileLayout(st, image);
02704   const RailtypeInfo *rti = NULL;
02705 
02706   if (railtype != INVALID_RAILTYPE) {
02707     rti = GetRailTypeInfo(railtype);
02708     total_offset = rti->total_offset;
02709   }
02710 
02711   SpriteID img = t->ground.sprite;
02712   if ((img == SPR_RAIL_TRACK_X || img == SPR_RAIL_TRACK_Y) && rti->UsesOverlay()) {
02713     SpriteID ground = GetCustomRailSprite(rti, INVALID_TILE, RTSG_GROUND);
02714     DrawSprite(SPR_FLAT_GRASS_TILE, PAL_NONE, x, y);
02715     DrawSprite(ground + (img == SPR_RAIL_TRACK_X ? RTO_X : RTO_Y), PAL_NONE, x, y);
02716   } else {
02717     DrawSprite(img + total_offset, HasBit(img, PALETTE_MODIFIER_COLOUR) ? pal : PAL_NONE, x, y);
02718   }
02719 
02720   if (roadtype == ROADTYPE_TRAM) {
02721     DrawSprite(SPR_TRAMWAY_TRAM + (t->ground.sprite == SPR_ROAD_PAVED_STRAIGHT_X ? 1 : 0), PAL_NONE, x, y);
02722   }
02723 
02724   /* Default waypoint has no railtype specific sprites */
02725   DrawRailTileSeqInGUI(x, y, t, st == STATION_WAYPOINT ? 0 : total_offset, 0, pal);
02726 }
02727 
02728 static uint GetSlopeZ_Station(TileIndex tile, uint x, uint y)
02729 {
02730   return GetTileMaxZ(tile);
02731 }
02732 
02733 static Foundation GetFoundation_Station(TileIndex tile, Slope tileh)
02734 {
02735   return FlatteningFoundation(tileh);
02736 }
02737 
02738 static void GetTileDesc_Station(TileIndex tile, TileDesc *td)
02739 {
02740   td->owner[0] = GetTileOwner(tile);
02741   if (IsDriveThroughStopTile(tile)) {
02742     Owner road_owner = INVALID_OWNER;
02743     Owner tram_owner = INVALID_OWNER;
02744     RoadTypes rts = GetRoadTypes(tile);
02745     if (HasBit(rts, ROADTYPE_ROAD)) road_owner = GetRoadOwner(tile, ROADTYPE_ROAD);
02746     if (HasBit(rts, ROADTYPE_TRAM)) tram_owner = GetRoadOwner(tile, ROADTYPE_TRAM);
02747 
02748     /* Is there a mix of owners? */
02749     if ((tram_owner != INVALID_OWNER && tram_owner != td->owner[0]) ||
02750         (road_owner != INVALID_OWNER && road_owner != td->owner[0])) {
02751       uint i = 1;
02752       if (road_owner != INVALID_OWNER) {
02753         td->owner_type[i] = STR_LAND_AREA_INFORMATION_ROAD_OWNER;
02754         td->owner[i] = road_owner;
02755         i++;
02756       }
02757       if (tram_owner != INVALID_OWNER) {
02758         td->owner_type[i] = STR_LAND_AREA_INFORMATION_TRAM_OWNER;
02759         td->owner[i] = tram_owner;
02760       }
02761     }
02762   }
02763   td->build_date = BaseStation::GetByTile(tile)->build_date;
02764 
02765   if (HasStationTileRail(tile)) {
02766     const StationSpec *spec = GetStationSpec(tile);
02767 
02768     if (spec != NULL) {
02769       td->station_class = StationClass::GetName(spec->cls_id);
02770       td->station_name  = spec->name;
02771 
02772       if (spec->grf_prop.grffile != NULL) {
02773         const GRFConfig *gc = GetGRFConfig(spec->grf_prop.grffile->grfid);
02774         td->grf = gc->GetName();
02775       }
02776     }
02777 
02778     const RailtypeInfo *rti = GetRailTypeInfo(GetRailType(tile));
02779     td->rail_speed = rti->max_speed;
02780   }
02781 
02782   if (IsAirport(tile)) {
02783     const AirportSpec *as = Station::GetByTile(tile)->airport.GetSpec();
02784     td->airport_class = AirportClass::GetName(as->cls_id);
02785     td->airport_name = as->name;
02786 
02787     const AirportTileSpec *ats = AirportTileSpec::GetByTile(tile);
02788     td->airport_tile_name = ats->name;
02789 
02790     if (as->grf_prop.grffile != NULL) {
02791       const GRFConfig *gc = GetGRFConfig(as->grf_prop.grffile->grfid);
02792       td->grf = gc->GetName();
02793     } else if (ats->grf_prop.grffile != NULL) {
02794       const GRFConfig *gc = GetGRFConfig(ats->grf_prop.grffile->grfid);
02795       td->grf = gc->GetName();
02796     }
02797   }
02798 
02799   StringID str;
02800   switch (GetStationType(tile)) {
02801     default: NOT_REACHED();
02802     case STATION_RAIL:     str = STR_LAI_STATION_DESCRIPTION_RAILROAD_STATION; break;
02803     case STATION_AIRPORT:
02804       str = (IsHangar(tile) ? STR_LAI_STATION_DESCRIPTION_AIRCRAFT_HANGAR : STR_LAI_STATION_DESCRIPTION_AIRPORT);
02805       break;
02806     case STATION_TRUCK:    str = STR_LAI_STATION_DESCRIPTION_TRUCK_LOADING_AREA; break;
02807     case STATION_BUS:      str = STR_LAI_STATION_DESCRIPTION_BUS_STATION; break;
02808     case STATION_OILRIG:   str = STR_INDUSTRY_NAME_OIL_RIG; break;
02809     case STATION_DOCK:     str = STR_LAI_STATION_DESCRIPTION_SHIP_DOCK; break;
02810     case STATION_BUOY:     str = STR_LAI_STATION_DESCRIPTION_BUOY; break;
02811     case STATION_WAYPOINT: str = STR_LAI_STATION_DESCRIPTION_WAYPOINT; break;
02812   }
02813   td->str = str;
02814 }
02815 
02816 
02817 static TrackStatus GetTileTrackStatus_Station(TileIndex tile, TransportType mode, uint sub_mode, DiagDirection side)
02818 {
02819   TrackBits trackbits = TRACK_BIT_NONE;
02820 
02821   switch (mode) {
02822     case TRANSPORT_RAIL:
02823       if (HasStationRail(tile) && !IsStationTileBlocked(tile)) {
02824         trackbits = TrackToTrackBits(GetRailStationTrack(tile));
02825       }
02826       break;
02827 
02828     case TRANSPORT_WATER:
02829       /* buoy is coded as a station, it is always on open water */
02830       if (IsBuoy(tile)) {
02831         trackbits = TRACK_BIT_ALL;
02832         /* remove tracks that connect NE map edge */
02833         if (TileX(tile) == 0) trackbits &= ~(TRACK_BIT_X | TRACK_BIT_UPPER | TRACK_BIT_RIGHT);
02834         /* remove tracks that connect NW map edge */
02835         if (TileY(tile) == 0) trackbits &= ~(TRACK_BIT_Y | TRACK_BIT_LEFT | TRACK_BIT_UPPER);
02836       }
02837       break;
02838 
02839     case TRANSPORT_ROAD:
02840       if ((GetRoadTypes(tile) & sub_mode) != 0 && IsRoadStop(tile)) {
02841         DiagDirection dir = GetRoadStopDir(tile);
02842         Axis axis = DiagDirToAxis(dir);
02843 
02844         if (side != INVALID_DIAGDIR) {
02845           if (axis != DiagDirToAxis(side) || (IsStandardRoadStopTile(tile) && dir != side)) break;
02846         }
02847 
02848         trackbits = AxisToTrackBits(axis);
02849       }
02850       break;
02851 
02852     default:
02853       break;
02854   }
02855 
02856   return CombineTrackStatus(TrackBitsToTrackdirBits(trackbits), TRACKDIR_BIT_NONE);
02857 }
02858 
02859 
02860 static void TileLoop_Station(TileIndex tile)
02861 {
02862   /* FIXME -- GetTileTrackStatus_Station -> animated stationtiles
02863    * hardcoded.....not good */
02864   switch (GetStationType(tile)) {
02865     case STATION_AIRPORT:
02866       AirportTileAnimationTrigger(Station::GetByTile(tile), tile, AAT_TILELOOP);
02867       break;
02868 
02869     case STATION_DOCK:
02870       if (GetTileSlope(tile, NULL) != SLOPE_FLAT) break; // only handle water part
02871       /* FALL THROUGH */
02872     case STATION_OILRIG: //(station part)
02873     case STATION_BUOY:
02874       TileLoop_Water(tile);
02875       break;
02876 
02877     default: break;
02878   }
02879 }
02880 
02881 
02882 static void AnimateTile_Station(TileIndex tile)
02883 {
02884   if (HasStationRail(tile)) {
02885     AnimateStationTile(tile);
02886     return;
02887   }
02888 
02889   if (IsAirport(tile)) {
02890     AnimateAirportTile(tile);
02891   }
02892 }
02893 
02894 
02895 static bool ClickTile_Station(TileIndex tile)
02896 {
02897   const BaseStation *bst = BaseStation::GetByTile(tile);
02898 
02899   if (bst->facilities & FACIL_WAYPOINT) {
02900     ShowWaypointWindow(Waypoint::From(bst));
02901   } else if (IsHangar(tile)) {
02902     const Station *st = Station::From(bst);
02903     ShowDepotWindow(st->airport.GetHangarTile(st->airport.GetHangarNum(tile)), VEH_AIRCRAFT);
02904   } else {
02905     ShowStationViewWindow(bst->index);
02906   }
02907   return true;
02908 }
02909 
02910 static VehicleEnterTileStatus VehicleEnter_Station(Vehicle *v, TileIndex tile, int x, int y)
02911 {
02912   if (v->type == VEH_TRAIN) {
02913     StationID station_id = GetStationIndex(tile);
02914     if (!v->current_order.ShouldStopAtStation(v, station_id)) return VETSB_CONTINUE;
02915     if (!IsRailStation(tile) || !v->IsFrontEngine()) return VETSB_CONTINUE;
02916 
02917     int station_ahead;
02918     int station_length;
02919     int stop = GetTrainStopLocation(station_id, tile, Train::From(v), &station_ahead, &station_length);
02920 
02921     /* Stop whenever that amount of station ahead + the distance from the
02922      * begin of the platform to the stop location is longer than the length
02923      * of the platform. Station ahead 'includes' the current tile where the
02924      * vehicle is on, so we need to substract that. */
02925     if (!IsInsideBS(stop + station_ahead, station_length, TILE_SIZE)) return VETSB_CONTINUE;
02926 
02927     DiagDirection dir = DirToDiagDir(v->direction);
02928 
02929     x &= 0xF;
02930     y &= 0xF;
02931 
02932     if (DiagDirToAxis(dir) != AXIS_X) Swap(x, y);
02933     if (y == TILE_SIZE / 2) {
02934       if (dir != DIAGDIR_SE && dir != DIAGDIR_SW) x = TILE_SIZE - 1 - x;
02935       stop &= TILE_SIZE - 1;
02936 
02937       if (x == stop) return VETSB_ENTERED_STATION | (VehicleEnterTileStatus)(station_id << VETS_STATION_ID_OFFSET); // enter station
02938       if (x < stop) {
02939         uint16 spd;
02940 
02941         v->vehstatus |= VS_TRAIN_SLOWING;
02942         spd = max(0, (stop - x) * 20 - 15);
02943         if (spd < v->cur_speed) v->cur_speed = spd;
02944       }
02945     }
02946   } else if (v->type == VEH_ROAD) {
02947     RoadVehicle *rv = RoadVehicle::From(v);
02948     if (rv->state < RVSB_IN_ROAD_STOP && !IsReversingRoadTrackdir((Trackdir)rv->state) && rv->frame == 0) {
02949       if (IsRoadStop(tile) && rv->IsFrontEngine()) {
02950         /* Attempt to allocate a parking bay in a road stop */
02951         return RoadStop::GetByTile(tile, GetRoadStopType(tile))->Enter(rv) ? VETSB_CONTINUE : VETSB_CANNOT_ENTER;
02952       }
02953     }
02954   }
02955 
02956   return VETSB_CONTINUE;
02957 }
02958 
02965 static bool StationHandleBigTick(BaseStation *st)
02966 {
02967   if (!st->IsInUse() && ++st->delete_ctr >= 8) {
02968     delete st;
02969     return false;
02970   }
02971 
02972   if ((st->facilities & FACIL_WAYPOINT) == 0) UpdateStationAcceptance(Station::From(st), true);
02973 
02974   return true;
02975 }
02976 
02977 static inline void byte_inc_sat(byte *p)
02978 {
02979   byte b = *p + 1;
02980   if (b != 0) *p = b;
02981 }
02982 
02983 static void UpdateStationRating(Station *st)
02984 {
02985   bool waiting_changed = false;
02986 
02987   byte_inc_sat(&st->time_since_load);
02988   byte_inc_sat(&st->time_since_unload);
02989 
02990   const CargoSpec *cs;
02991   FOR_ALL_CARGOSPECS(cs) {
02992     GoodsEntry *ge = &st->goods[cs->Index()];
02993     /* Slowly increase the rating back to his original level in the case we
02994      *  didn't deliver cargo yet to this station. This happens when a bribe
02995      *  failed while you didn't moved that cargo yet to a station. */
02996     if (!HasBit(ge->acceptance_pickup, GoodsEntry::PICKUP) && ge->rating < INITIAL_STATION_RATING) {
02997       ge->rating++;
02998     }
02999 
03000     /* Only change the rating if we are moving this cargo */
03001     if (HasBit(ge->acceptance_pickup, GoodsEntry::PICKUP)) {
03002       byte_inc_sat(&ge->days_since_pickup);
03003 
03004       bool skip = false;
03005       int rating = 0;
03006       uint waiting = ge->cargo.Count();
03007 
03008       if (HasBit(cs->callback_mask, CBM_CARGO_STATION_RATING_CALC)) {
03009         /* Perform custom station rating. If it succeeds the speed, days in transit and
03010          * waiting cargo ratings must not be executed. */
03011 
03012         /* NewGRFs expect last speed to be 0xFF when no vehicle has arrived yet. */
03013         uint last_speed = ge->last_speed;
03014         if (last_speed == 0) last_speed = 0xFF;
03015 
03016         uint32 var18 = min(ge->days_since_pickup, 0xFF) | (min(waiting, 0xFFFF) << 8) | (min(last_speed, 0xFF) << 24);
03017         /* Convert to the 'old' vehicle types */
03018         uint32 var10 = (st->last_vehicle_type == VEH_INVALID) ? 0x0 : (st->last_vehicle_type + 0x10);
03019         uint16 callback = GetCargoCallback(CBID_CARGO_STATION_RATING_CALC, var10, var18, cs);
03020         if (callback != CALLBACK_FAILED) {
03021           skip = true;
03022           rating = GB(callback, 0, 14);
03023 
03024           /* Simulate a 15 bit signed value */
03025           if (HasBit(callback, 14)) rating -= 0x4000;
03026         }
03027       }
03028 
03029       if (!skip) {
03030         int b = ge->last_speed - 85;
03031         if (b >= 0) rating += b >> 2;
03032 
03033         byte days = ge->days_since_pickup;
03034         if (st->last_vehicle_type == VEH_SHIP) days >>= 2;
03035         (days > 21) ||
03036         (rating += 25, days > 12) ||
03037         (rating += 25, days > 6) ||
03038         (rating += 45, days > 3) ||
03039         (rating += 35, true);
03040 
03041         (rating -= 90, waiting > 1500) ||
03042         (rating += 55, waiting > 1000) ||
03043         (rating += 35, waiting > 600) ||
03044         (rating += 10, waiting > 300) ||
03045         (rating += 20, waiting > 100) ||
03046         (rating += 10, true);
03047       }
03048 
03049       if (Company::IsValidID(st->owner) && HasBit(st->town->statues, st->owner)) rating += 26;
03050 
03051       byte age = ge->last_age;
03052       (age >= 3) ||
03053       (rating += 10, age >= 2) ||
03054       (rating += 10, age >= 1) ||
03055       (rating += 13, true);
03056 
03057       {
03058         int or_ = ge->rating; // old rating
03059 
03060         /* only modify rating in steps of -2, -1, 0, 1 or 2 */
03061         ge->rating = rating = or_ + Clamp(Clamp(rating, 0, 255) - or_, -2, 2);
03062 
03063         /* if rating is <= 64 and more than 200 items waiting,
03064          * remove some random amount of goods from the station */
03065         if (rating <= 64 && waiting >= 200) {
03066           int dec = Random() & 0x1F;
03067           if (waiting < 400) dec &= 7;
03068           waiting -= dec + 1;
03069           waiting_changed = true;
03070         }
03071 
03072         /* if rating is <= 127 and there are any items waiting, maybe remove some goods. */
03073         if (rating <= 127 && waiting != 0) {
03074           uint32 r = Random();
03075           if (rating <= (int)GB(r, 0, 7)) {
03076             /* Need to have int, otherwise it will just overflow etc. */
03077             waiting = max((int)waiting - (int)GB(r, 8, 2) - 1, 0);
03078             waiting_changed = true;
03079           }
03080         }
03081 
03082         /* At some point we really must cap the cargo. Previously this
03083          * was a strict 4095, but now we'll have a less strict, but
03084          * increasingly agressive truncation of the amount of cargo. */
03085         static const uint WAITING_CARGO_THRESHOLD  = 1 << 12;
03086         static const uint WAITING_CARGO_CUT_FACTOR = 1 <<  6;
03087         static const uint MAX_WAITING_CARGO        = 1 << 15;
03088 
03089         if (waiting > WAITING_CARGO_THRESHOLD) {
03090           uint difference = waiting - WAITING_CARGO_THRESHOLD;
03091           waiting -= (difference / WAITING_CARGO_CUT_FACTOR);
03092 
03093           waiting = min(waiting, MAX_WAITING_CARGO);
03094           waiting_changed = true;
03095         }
03096 
03097         if (waiting_changed) ge->cargo.Truncate(waiting);
03098       }
03099     }
03100   }
03101 
03102   StationID index = st->index;
03103   if (waiting_changed) {
03104     SetWindowDirty(WC_STATION_VIEW, index); // update whole window
03105   } else {
03106     SetWindowWidgetDirty(WC_STATION_VIEW, index, SVW_RATINGLIST); // update only ratings list
03107   }
03108 }
03109 
03110 /* called for every station each tick */
03111 static void StationHandleSmallTick(BaseStation *st)
03112 {
03113   if ((st->facilities & FACIL_WAYPOINT) != 0 || !st->IsInUse()) return;
03114 
03115   byte b = st->delete_ctr + 1;
03116   if (b >= 185) b = 0;
03117   st->delete_ctr = b;
03118 
03119   if (b == 0) UpdateStationRating(Station::From(st));
03120 }
03121 
03122 void OnTick_Station()
03123 {
03124   if (_game_mode == GM_EDITOR) return;
03125 
03126   BaseStation *st;
03127   FOR_ALL_BASE_STATIONS(st) {
03128     StationHandleSmallTick(st);
03129 
03130     /* Run 250 tick interval trigger for station animation.
03131      * Station index is included so that triggers are not all done
03132      * at the same time. */
03133     if ((_tick_counter + st->index) % 250 == 0) {
03134       /* Stop processing this station if it was deleted */
03135       if (!StationHandleBigTick(st)) continue;
03136       TriggerStationAnimation(st, st->xy, SAT_250_TICKS);
03137       if (Station::IsExpected(st)) AirportAnimationTrigger(Station::From(st), AAT_STATION_250_TICKS);
03138     }
03139   }
03140 }
03141 
03142 void StationMonthlyLoop()
03143 {
03144   /* not used */
03145 }
03146 
03147 
03148 void ModifyStationRatingAround(TileIndex tile, Owner owner, int amount, uint radius)
03149 {
03150   Station *st;
03151 
03152   FOR_ALL_STATIONS(st) {
03153     if (st->owner == owner &&
03154         DistanceManhattan(tile, st->xy) <= radius) {
03155       for (CargoID i = 0; i < NUM_CARGO; i++) {
03156         GoodsEntry *ge = &st->goods[i];
03157 
03158         if (ge->acceptance_pickup != 0) {
03159           ge->rating = Clamp(ge->rating + amount, 0, 255);
03160         }
03161       }
03162     }
03163   }
03164 }
03165 
03166 static uint UpdateStationWaiting(Station *st, CargoID type, uint amount, SourceType source_type, SourceID source_id)
03167 {
03168   GoodsEntry &ge = st->goods[type];
03169   amount += ge.amount_fract;
03170   ge.amount_fract = GB(amount, 0, 8);
03171 
03172   amount >>= 8;
03173   /* No new "real" cargo item yet. */
03174   if (amount == 0) return 0;
03175 
03176   ge.cargo.Append(new CargoPacket(st->index, st->xy, amount, source_type, source_id));
03177 
03178   if (!HasBit(ge.acceptance_pickup, GoodsEntry::PICKUP)) {
03179     InvalidateWindowData(WC_STATION_LIST, st->index);
03180     SetBit(ge.acceptance_pickup, GoodsEntry::PICKUP);
03181   }
03182 
03183   TriggerStationAnimation(st, st->xy, SAT_NEW_CARGO, type);
03184   AirportAnimationTrigger(st, AAT_STATION_NEW_CARGO, type);
03185 
03186   SetWindowDirty(WC_STATION_VIEW, st->index);
03187   st->MarkTilesDirty(true);
03188   return amount;
03189 }
03190 
03191 static bool IsUniqueStationName(const char *name)
03192 {
03193   const Station *st;
03194 
03195   FOR_ALL_STATIONS(st) {
03196     if (st->name != NULL && strcmp(st->name, name) == 0) return false;
03197   }
03198 
03199   return true;
03200 }
03201 
03211 CommandCost CmdRenameStation(TileIndex tile, DoCommandFlag flags, uint32 p1, uint32 p2, const char *text)
03212 {
03213   Station *st = Station::GetIfValid(p1);
03214   if (st == NULL) return CMD_ERROR;
03215 
03216   CommandCost ret = CheckOwnership(st->owner);
03217   if (ret.Failed()) return ret;
03218 
03219   bool reset = StrEmpty(text);
03220 
03221   if (!reset) {
03222     if (Utf8StringLength(text) >= MAX_LENGTH_STATION_NAME_CHARS) return CMD_ERROR;
03223     if (!IsUniqueStationName(text)) return_cmd_error(STR_ERROR_NAME_MUST_BE_UNIQUE);
03224   }
03225 
03226   if (flags & DC_EXEC) {
03227     free(st->name);
03228     st->name = reset ? NULL : strdup(text);
03229 
03230     st->UpdateVirtCoord();
03231     InvalidateWindowData(WC_STATION_LIST, st->owner, 1);
03232   }
03233 
03234   return CommandCost();
03235 }
03236 
03243 void FindStationsAroundTiles(const TileArea &location, StationList *stations)
03244 {
03245   /* area to search = producer plus station catchment radius */
03246   int max_rad = (_settings_game.station.modified_catchment ? MAX_CATCHMENT : CA_UNMODIFIED);
03247 
03248   for (int dy = -max_rad; dy < location.h + max_rad; dy++) {
03249     for (int dx = -max_rad; dx < location.w + max_rad; dx++) {
03250       TileIndex cur_tile = TileAddWrap(location.tile, dx, dy);
03251       if (cur_tile == INVALID_TILE || !IsTileType(cur_tile, MP_STATION)) continue;
03252 
03253       Station *st = Station::GetByTile(cur_tile);
03254       if (st == NULL) continue;
03255 
03256       if (_settings_game.station.modified_catchment) {
03257         int rad = st->GetCatchmentRadius();
03258         if (dx < -rad || dx >= rad + location.w || dy < -rad || dy >= rad + location.h) continue;
03259       }
03260 
03261       /* Insert the station in the set. This will fail if it has
03262        * already been added.
03263        */
03264       stations->Include(st);
03265     }
03266   }
03267 }
03268 
03273 const StationList *StationFinder::GetStations()
03274 {
03275   if (this->tile != INVALID_TILE) {
03276     FindStationsAroundTiles(*this, &this->stations);
03277     this->tile = INVALID_TILE;
03278   }
03279   return &this->stations;
03280 }
03281 
03282 uint MoveGoodsToStation(CargoID type, uint amount, SourceType source_type, SourceID source_id, const StationList *all_stations)
03283 {
03284   /* Return if nothing to do. Also the rounding below fails for 0. */
03285   if (amount == 0) return 0;
03286 
03287   Station *st1 = NULL;   // Station with best rating
03288   Station *st2 = NULL;   // Second best station
03289   uint best_rating1 = 0; // rating of st1
03290   uint best_rating2 = 0; // rating of st2
03291 
03292   for (Station * const *st_iter = all_stations->Begin(); st_iter != all_stations->End(); ++st_iter) {
03293     Station *st = *st_iter;
03294 
03295     /* Is the station reserved exclusively for somebody else? */
03296     if (st->town->exclusive_counter > 0 && st->town->exclusivity != st->owner) continue;
03297 
03298     if (st->goods[type].rating == 0) continue; // Lowest possible rating, better not to give cargo anymore
03299 
03300     if (_settings_game.order.selectgoods && st->goods[type].last_speed == 0) continue; // Selectively servicing stations, and not this one
03301 
03302     if (IsCargoInClass(type, CC_PASSENGERS)) {
03303       if (st->facilities == FACIL_TRUCK_STOP) continue; // passengers are never served by just a truck stop
03304     } else {
03305       if (st->facilities == FACIL_BUS_STOP) continue; // non-passengers are never served by just a bus stop
03306     }
03307 
03308     /* This station can be used, add it to st1/st2 */
03309     if (st1 == NULL || st->goods[type].rating >= best_rating1) {
03310       st2 = st1; best_rating2 = best_rating1; st1 = st; best_rating1 = st->goods[type].rating;
03311     } else if (st2 == NULL || st->goods[type].rating >= best_rating2) {
03312       st2 = st; best_rating2 = st->goods[type].rating;
03313     }
03314   }
03315 
03316   /* no stations around at all? */
03317   if (st1 == NULL) return 0;
03318 
03319   /* From now we'll calculate with fractal cargo amounts.
03320    * First determine how much cargo we really have. */
03321   amount *= best_rating1 + 1;
03322 
03323   if (st2 == NULL) {
03324     /* only one station around */
03325     return UpdateStationWaiting(st1, type, amount, source_type, source_id);
03326   }
03327 
03328   /* several stations around, the best two (highest rating) are in st1 and st2 */
03329   assert(st1 != NULL);
03330   assert(st2 != NULL);
03331   assert(best_rating1 != 0 || best_rating2 != 0);
03332 
03333   /* Then determine the amount the worst station gets. We do it this way as the
03334    * best should get a bonus, which in this case is the rounding difference from
03335    * this calculation. In reality that will mean the bonus will be pretty low.
03336    * Nevertheless, the best station should always get the most cargo regardless
03337    * of rounding issues. */
03338   uint worst_cargo = amount * best_rating2 / (best_rating1 + best_rating2);
03339   assert(worst_cargo <= (amount - worst_cargo));
03340 
03341   /* And then send the cargo to the stations! */
03342   uint moved = UpdateStationWaiting(st1, type, amount - worst_cargo, source_type, source_id);
03343   /* These two UpdateStationWaiting's can't be in the statement as then the order
03344    * of execution would be undefined and that could cause desyncs with callbacks. */
03345   return moved + UpdateStationWaiting(st2, type, worst_cargo, source_type, source_id);
03346 }
03347 
03348 void BuildOilRig(TileIndex tile)
03349 {
03350   if (!Station::CanAllocateItem()) {
03351     DEBUG(misc, 0, "Can't allocate station for oilrig at 0x%X, reverting to oilrig only", tile);
03352     return;
03353   }
03354 
03355   Station *st = new Station(tile);
03356   st->town = ClosestTownFromTile(tile, UINT_MAX);
03357 
03358   st->string_id = GenerateStationName(st, tile, STATIONNAMING_OILRIG);
03359 
03360   assert(IsTileType(tile, MP_INDUSTRY));
03361   DeleteAnimatedTile(tile);
03362   MakeOilrig(tile, st->index, GetWaterClass(tile));
03363 
03364   st->owner = OWNER_NONE;
03365   st->airport.type = AT_OILRIG;
03366   st->airport.Add(tile);
03367   st->dock_tile = tile;
03368   st->facilities = FACIL_AIRPORT | FACIL_DOCK;
03369   st->build_date = _date;
03370 
03371   st->rect.BeforeAddTile(tile, StationRect::ADD_FORCE);
03372 
03373   for (CargoID j = 0; j < NUM_CARGO; j++) {
03374     st->goods[j].acceptance_pickup = 0;
03375     st->goods[j].days_since_pickup = 255;
03376     st->goods[j].rating = INITIAL_STATION_RATING;
03377     st->goods[j].last_speed = 0;
03378     st->goods[j].last_age = 255;
03379   }
03380 
03381   st->UpdateVirtCoord();
03382   UpdateStationAcceptance(st, false);
03383   st->RecomputeIndustriesNear();
03384 }
03385 
03386 void DeleteOilRig(TileIndex tile)
03387 {
03388   Station *st = Station::GetByTile(tile);
03389 
03390   MakeWaterKeepingClass(tile, OWNER_NONE);
03391 
03392   st->dock_tile = INVALID_TILE;
03393   st->airport.Clear();
03394   st->facilities &= ~(FACIL_AIRPORT | FACIL_DOCK);
03395   st->airport.flags = 0;
03396 
03397   st->rect.AfterRemoveTile(st, tile);
03398 
03399   st->UpdateVirtCoord();
03400   st->RecomputeIndustriesNear();
03401   if (!st->IsInUse()) delete st;
03402 }
03403 
03404 static void ChangeTileOwner_Station(TileIndex tile, Owner old_owner, Owner new_owner)
03405 {
03406   if (IsDriveThroughStopTile(tile)) {
03407     for (RoadType rt = ROADTYPE_ROAD; rt < ROADTYPE_END; rt++) {
03408       /* Update all roadtypes, no matter if they are present */
03409       if (GetRoadOwner(tile, rt) == old_owner) {
03410         SetRoadOwner(tile, rt, new_owner == INVALID_OWNER ? OWNER_NONE : new_owner);
03411       }
03412     }
03413   }
03414 
03415   if (!IsTileOwner(tile, old_owner)) return;
03416 
03417   if (new_owner != INVALID_OWNER) {
03418     /* for buoys, owner of tile is owner of water, st->owner == OWNER_NONE */
03419     SetTileOwner(tile, new_owner);
03420     InvalidateWindowClassesData(WC_STATION_LIST, 0);
03421   } else {
03422     if (IsDriveThroughStopTile(tile)) {
03423       /* Remove the drive-through road stop */
03424       DoCommand(tile, 1 | 1 << 8, (GetStationType(tile) == STATION_TRUCK) ? ROADSTOP_TRUCK : ROADSTOP_BUS, DC_EXEC | DC_BANKRUPT, CMD_REMOVE_ROAD_STOP);
03425       assert(IsTileType(tile, MP_ROAD));
03426       /* Change owner of tile and all roadtypes */
03427       ChangeTileOwner(tile, old_owner, new_owner);
03428     } else {
03429       DoCommand(tile, 0, 0, DC_EXEC | DC_BANKRUPT, CMD_LANDSCAPE_CLEAR);
03430       /* Set tile owner of water under (now removed) buoy and dock to OWNER_NONE.
03431        * Update owner of buoy if it was not removed (was in orders).
03432        * Do not update when owned by OWNER_WATER (sea and rivers). */
03433       if ((IsTileType(tile, MP_WATER) || IsBuoyTile(tile)) && IsTileOwner(tile, old_owner)) SetTileOwner(tile, OWNER_NONE);
03434     }
03435   }
03436 }
03437 
03446 static bool CanRemoveRoadWithStop(TileIndex tile, DoCommandFlag flags)
03447 {
03448   /* Yeah... water can always remove stops, right? */
03449   if (_current_company == OWNER_WATER) return true;
03450 
03451   Owner road_owner = _current_company;
03452   Owner tram_owner = _current_company;
03453 
03454   RoadTypes rts = GetRoadTypes(tile);
03455   if (HasBit(rts, ROADTYPE_ROAD)) road_owner = GetRoadOwner(tile, ROADTYPE_ROAD);
03456   if (HasBit(rts, ROADTYPE_TRAM)) tram_owner = GetRoadOwner(tile, ROADTYPE_TRAM);
03457 
03458   if ((road_owner != OWNER_TOWN && CheckOwnership(road_owner).Failed()) || CheckOwnership(tram_owner).Failed()) return false;
03459 
03460   return road_owner != OWNER_TOWN || CheckAllowRemoveRoad(tile, GetAnyRoadBits(tile, ROADTYPE_ROAD), OWNER_TOWN, ROADTYPE_ROAD, flags).Succeeded();
03461 }
03462 
03463 CommandCost ClearTile_Station(TileIndex tile, DoCommandFlag flags)
03464 {
03465   if (flags & DC_AUTO) {
03466     switch (GetStationType(tile)) {
03467       default: break;
03468       case STATION_RAIL:     return_cmd_error(STR_ERROR_MUST_DEMOLISH_RAILROAD);
03469       case STATION_WAYPOINT: return_cmd_error(STR_ERROR_BUILDING_MUST_BE_DEMOLISHED);
03470       case STATION_AIRPORT:  return_cmd_error(STR_ERROR_MUST_DEMOLISH_AIRPORT_FIRST);
03471       case STATION_TRUCK:    return_cmd_error(HasTileRoadType(tile, ROADTYPE_TRAM) ? STR_ERROR_MUST_DEMOLISH_CARGO_TRAM_STATION_FIRST : STR_ERROR_MUST_DEMOLISH_TRUCK_STATION_FIRST);
03472       case STATION_BUS:      return_cmd_error(HasTileRoadType(tile, ROADTYPE_TRAM) ? STR_ERROR_MUST_DEMOLISH_PASSENGER_TRAM_STATION_FIRST : STR_ERROR_MUST_DEMOLISH_BUS_STATION_FIRST);
03473       case STATION_BUOY:     return_cmd_error(STR_ERROR_BUOY_IN_THE_WAY);
03474       case STATION_DOCK:     return_cmd_error(STR_ERROR_MUST_DEMOLISH_DOCK_FIRST);
03475       case STATION_OILRIG:
03476         SetDParam(1, STR_INDUSTRY_NAME_OIL_RIG);
03477         return_cmd_error(STR_ERROR_GENERIC_OBJECT_IN_THE_WAY);
03478     }
03479   }
03480 
03481   switch (GetStationType(tile)) {
03482     case STATION_RAIL:     return RemoveRailStation(tile, flags);
03483     case STATION_WAYPOINT: return RemoveRailWaypoint(tile, flags);
03484     case STATION_AIRPORT:  return RemoveAirport(tile, flags);
03485     case STATION_TRUCK:
03486       if (IsDriveThroughStopTile(tile) && !CanRemoveRoadWithStop(tile, flags)) {
03487         return_cmd_error(STR_ERROR_MUST_DEMOLISH_TRUCK_STATION_FIRST);
03488       }
03489       return RemoveRoadStop(tile, flags);
03490     case STATION_BUS:
03491       if (IsDriveThroughStopTile(tile) && !CanRemoveRoadWithStop(tile, flags)) {
03492         return_cmd_error(STR_ERROR_MUST_DEMOLISH_BUS_STATION_FIRST);
03493       }
03494       return RemoveRoadStop(tile, flags);
03495     case STATION_BUOY:     return RemoveBuoy(tile, flags);
03496     case STATION_DOCK:     return RemoveDock(tile, flags);
03497     default: break;
03498   }
03499 
03500   return CMD_ERROR;
03501 }
03502 
03503 static CommandCost TerraformTile_Station(TileIndex tile, DoCommandFlag flags, uint z_new, Slope tileh_new)
03504 {
03505   if (_settings_game.construction.build_on_slopes && AutoslopeEnabled()) {
03506     /* TODO: If you implement newgrf callback 149 'land slope check', you have to decide what to do with it here.
03507      *       TTDP does not call it.
03508      */
03509     if (!IsSteepSlope(tileh_new) && (GetTileMaxZ(tile) == z_new + GetSlopeMaxZ(tileh_new))) {
03510       switch (GetStationType(tile)) {
03511         case STATION_WAYPOINT:
03512         case STATION_RAIL: {
03513           DiagDirection direction = AxisToDiagDir(GetRailStationAxis(tile));
03514           if (!AutoslopeCheckForEntranceEdge(tile, z_new, tileh_new, direction)) break;
03515           if (!AutoslopeCheckForEntranceEdge(tile, z_new, tileh_new, ReverseDiagDir(direction))) break;
03516           return CommandCost(EXPENSES_CONSTRUCTION, _price[PR_BUILD_FOUNDATION]);
03517         }
03518 
03519         case STATION_AIRPORT:
03520           return CommandCost(EXPENSES_CONSTRUCTION, _price[PR_BUILD_FOUNDATION]);
03521 
03522         case STATION_TRUCK:
03523         case STATION_BUS: {
03524           DiagDirection direction = GetRoadStopDir(tile);
03525           if (!AutoslopeCheckForEntranceEdge(tile, z_new, tileh_new, direction)) break;
03526           if (IsDriveThroughStopTile(tile)) {
03527             if (!AutoslopeCheckForEntranceEdge(tile, z_new, tileh_new, ReverseDiagDir(direction))) break;
03528           }
03529           return CommandCost(EXPENSES_CONSTRUCTION, _price[PR_BUILD_FOUNDATION]);
03530         }
03531 
03532         default: break;
03533       }
03534     }
03535   }
03536   return DoCommand(tile, 0, 0, flags, CMD_LANDSCAPE_CLEAR);
03537 }
03538 
03539 
03540 extern const TileTypeProcs _tile_type_station_procs = {
03541   DrawTile_Station,           // draw_tile_proc
03542   GetSlopeZ_Station,          // get_slope_z_proc
03543   ClearTile_Station,          // clear_tile_proc
03544   NULL,                       // add_accepted_cargo_proc
03545   GetTileDesc_Station,        // get_tile_desc_proc
03546   GetTileTrackStatus_Station, // get_tile_track_status_proc
03547   ClickTile_Station,          // click_tile_proc
03548   AnimateTile_Station,        // animate_tile_proc
03549   TileLoop_Station,           // tile_loop_clear
03550   ChangeTileOwner_Station,    // change_tile_owner_clear
03551   NULL,                       // add_produced_cargo_proc
03552   VehicleEnter_Station,       // vehicle_enter_tile_proc
03553   GetFoundation_Station,      // get_foundation_proc
03554   TerraformTile_Station,      // terraform_tile_proc
03555 };

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