station_cmd.cpp

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00001 /* $Id: station_cmd.cpp 18726 2010-01-04 21:10:20Z 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 "openttd.h"
00014 #include "aircraft.h"
00015 #include "bridge_map.h"
00016 #include "cmd_helper.h"
00017 #include "landscape.h"
00018 #include "viewport_func.h"
00019 #include "command_func.h"
00020 #include "town.h"
00021 #include "news_func.h"
00022 #include "train.h"
00023 #include "roadveh.h"
00024 #include "industry.h"
00025 #include "newgrf_cargo.h"
00026 #include "newgrf_station.h"
00027 #include "newgrf_commons.h"
00028 #include "pathfinder/yapf/yapf_cache.h"
00029 #include "road_internal.h" /* For drawing catenary/checking road removal */
00030 #include "variables.h"
00031 #include "autoslope.h"
00032 #include "water.h"
00033 #include "station_gui.h"
00034 #include "strings_func.h"
00035 #include "functions.h"
00036 #include "window_func.h"
00037 #include "date_func.h"
00038 #include "vehicle_func.h"
00039 #include "string_func.h"
00040 #include "animated_tile_func.h"
00041 #include "elrail_func.h"
00042 #include "station_base.h"
00043 #include "roadstop_base.h"
00044 #include "waypoint_base.h"
00045 #include "waypoint_func.h"
00046 #include "pbs.h"
00047 #include "debug.h"
00048 
00049 #include "table/strings.h"
00050 
00057 bool IsHangar(TileIndex t)
00058 {
00059   assert(IsTileType(t, MP_STATION));
00060 
00061   /* If the tile isn't an airport there's no chance it's a hangar. */
00062   if (!IsAirport(t)) return false;
00063 
00064   const Station *st = Station::GetByTile(t);
00065   const AirportFTAClass *apc = st->Airport();
00066 
00067   for (uint i = 0; i < apc->nof_depots; i++) {
00068     if (st->airport_tile + ToTileIndexDiff(apc->airport_depots[i]) == t) return true;
00069   }
00070 
00071   return false;
00072 }
00073 
00081 template <class T>
00082 bool GetStationAround(TileArea ta, StationID closest_station, T **st)
00083 {
00084   /* check around to see if there's any stations there */
00085   TILE_LOOP(tile_cur, ta.w + 2, ta.h + 2, ta.tile - TileDiffXY(1, 1)) {
00086     if (IsTileType(tile_cur, MP_STATION)) {
00087       StationID t = GetStationIndex(tile_cur);
00088 
00089       if (closest_station == INVALID_STATION) {
00090         if (T::IsValidID(t)) closest_station = t;
00091       } else if (closest_station != t) {
00092         _error_message = STR_ERROR_ADJOINS_MORE_THAN_ONE_EXISTING;
00093         return false;
00094       }
00095     }
00096   }
00097   *st = (closest_station == INVALID_STATION) ? NULL : T::Get(closest_station);
00098   return true;
00099 }
00100 
00106 typedef bool (*CMSAMatcher)(TileIndex tile);
00107 
00114 static int CountMapSquareAround(TileIndex tile, CMSAMatcher cmp)
00115 {
00116   int num = 0;
00117 
00118   for (int dx = -3; dx <= 3; dx++) {
00119     for (int dy = -3; dy <= 3; dy++) {
00120       TileIndex t = TileAddWrap(tile, dx, dy);
00121       if (t != INVALID_TILE && cmp(t)) num++;
00122     }
00123   }
00124 
00125   return num;
00126 }
00127 
00133 static bool CMSAMine(TileIndex tile)
00134 {
00135   /* No industry */
00136   if (!IsTileType(tile, MP_INDUSTRY)) return false;
00137 
00138   const Industry *ind = Industry::GetByTile(tile);
00139 
00140   /* No extractive industry */
00141   if ((GetIndustrySpec(ind->type)->life_type & INDUSTRYLIFE_EXTRACTIVE) == 0) return false;
00142 
00143   for (uint i = 0; i < lengthof(ind->produced_cargo); i++) {
00144     /* The industry extracts something non-liquid, i.e. no oil or plastic, so it is a mine.
00145      * Also the production of passengers and mail is ignored. */
00146     if (ind->produced_cargo[i] != CT_INVALID &&
00147         (CargoSpec::Get(ind->produced_cargo[i])->classes & (CC_LIQUID | CC_PASSENGERS | CC_MAIL)) == 0) {
00148       return true;
00149     }
00150   }
00151 
00152   return false;
00153 }
00154 
00160 static bool CMSAWater(TileIndex tile)
00161 {
00162   return IsTileType(tile, MP_WATER) && IsWater(tile);
00163 }
00164 
00170 static bool CMSATree(TileIndex tile)
00171 {
00172   return IsTileType(tile, MP_TREES);
00173 }
00174 
00180 static bool CMSAForest(TileIndex tile)
00181 {
00182   /* No industry */
00183   if (!IsTileType(tile, MP_INDUSTRY)) return false;
00184 
00185   const Industry *ind = Industry::GetByTile(tile);
00186 
00187   /* No extractive industry */
00188   if ((GetIndustrySpec(ind->type)->life_type & INDUSTRYLIFE_ORGANIC) == 0) return false;
00189 
00190   for (uint i = 0; i < lengthof(ind->produced_cargo); i++) {
00191     /* The industry produces wood. */
00192     if (ind->produced_cargo[i] != CT_INVALID && CargoSpec::Get(ind->produced_cargo[i])->label == 'WOOD') return true;
00193   }
00194 
00195   return false;
00196 }
00197 
00198 #define M(x) ((x) - STR_SV_STNAME)
00199 
00200 enum StationNaming {
00201   STATIONNAMING_RAIL,
00202   STATIONNAMING_ROAD,
00203   STATIONNAMING_AIRPORT,
00204   STATIONNAMING_OILRIG,
00205   STATIONNAMING_DOCK,
00206   STATIONNAMING_HELIPORT,
00207 };
00208 
00210 struct StationNameInformation {
00211   uint32 free_names; 
00212   bool *indtypes;    
00213 };
00214 
00223 static bool FindNearIndustryName(TileIndex tile, void *user_data)
00224 {
00225   /* All already found industry types */
00226   StationNameInformation *sni = (StationNameInformation*)user_data;
00227   if (!IsTileType(tile, MP_INDUSTRY)) return false;
00228 
00229   /* If the station name is undefined it means that it doesn't name a station */
00230   IndustryType indtype = GetIndustryType(tile);
00231   if (GetIndustrySpec(indtype)->station_name == STR_UNDEFINED) return false;
00232 
00233   /* In all cases if an industry that provides a name is found two of
00234    * the standard names will be disabled. */
00235   sni->free_names &= ~(1 << M(STR_SV_STNAME_OILFIELD) | 1 << M(STR_SV_STNAME_MINES));
00236   return !sni->indtypes[indtype];
00237 }
00238 
00239 static StringID GenerateStationName(Station *st, TileIndex tile, StationNaming name_class)
00240 {
00241   static const uint32 _gen_station_name_bits[] = {
00242     0,                                       // STATIONNAMING_RAIL
00243     0,                                       // STATIONNAMING_ROAD
00244     1U << M(STR_SV_STNAME_AIRPORT),          // STATIONNAMING_AIRPORT
00245     1U << M(STR_SV_STNAME_OILFIELD),         // STATIONNAMING_OILRIG
00246     1U << M(STR_SV_STNAME_DOCKS),            // STATIONNAMING_DOCK
00247     1U << M(STR_SV_STNAME_HELIPORT),         // STATIONNAMING_HELIPORT
00248   };
00249 
00250   const Town *t = st->town;
00251   uint32 free_names = UINT32_MAX;
00252 
00253   bool indtypes[NUM_INDUSTRYTYPES];
00254   memset(indtypes, 0, sizeof(indtypes));
00255 
00256   const Station *s;
00257   FOR_ALL_STATIONS(s) {
00258     if (s != st && s->town == t) {
00259       if (s->indtype != IT_INVALID) {
00260         indtypes[s->indtype] = true;
00261         continue;
00262       }
00263       uint str = M(s->string_id);
00264       if (str <= 0x20) {
00265         if (str == M(STR_SV_STNAME_FOREST)) {
00266           str = M(STR_SV_STNAME_WOODS);
00267         }
00268         ClrBit(free_names, str);
00269       }
00270     }
00271   }
00272 
00273   TileIndex indtile = tile;
00274   StationNameInformation sni = { free_names, indtypes };
00275   if (CircularTileSearch(&indtile, 7, FindNearIndustryName, &sni)) {
00276     /* An industry has been found nearby */
00277     IndustryType indtype = GetIndustryType(indtile);
00278     const IndustrySpec *indsp = GetIndustrySpec(indtype);
00279     /* STR_NULL means it only disables oil rig/mines */
00280     if (indsp->station_name != STR_NULL) {
00281       st->indtype = indtype;
00282       return STR_SV_STNAME_FALLBACK;
00283     }
00284   }
00285 
00286   /* Oil rigs/mines name could be marked not free by looking for a near by industry. */
00287   free_names = sni.free_names;
00288 
00289   /* check default names */
00290   uint32 tmp = free_names & _gen_station_name_bits[name_class];
00291   if (tmp != 0) return STR_SV_STNAME + FindFirstBit(tmp);
00292 
00293   /* check mine? */
00294   if (HasBit(free_names, M(STR_SV_STNAME_MINES))) {
00295     if (CountMapSquareAround(tile, CMSAMine) >= 2) {
00296       return STR_SV_STNAME_MINES;
00297     }
00298   }
00299 
00300   /* check close enough to town to get central as name? */
00301   if (DistanceMax(tile, t->xy) < 8) {
00302     if (HasBit(free_names, M(STR_SV_STNAME))) return STR_SV_STNAME;
00303 
00304     if (HasBit(free_names, M(STR_SV_STNAME_CENTRAL))) return STR_SV_STNAME_CENTRAL;
00305   }
00306 
00307   /* Check lakeside */
00308   if (HasBit(free_names, M(STR_SV_STNAME_LAKESIDE)) &&
00309       DistanceFromEdge(tile) < 20 &&
00310       CountMapSquareAround(tile, CMSAWater) >= 5) {
00311     return STR_SV_STNAME_LAKESIDE;
00312   }
00313 
00314   /* Check woods */
00315   if (HasBit(free_names, M(STR_SV_STNAME_WOODS)) && (
00316         CountMapSquareAround(tile, CMSATree) >= 8 ||
00317         CountMapSquareAround(tile, CMSAForest) >= 2)
00318       ) {
00319     return _settings_game.game_creation.landscape == LT_TROPIC ? STR_SV_STNAME_FOREST : STR_SV_STNAME_WOODS;
00320   }
00321 
00322   /* check elevation compared to town */
00323   uint z = GetTileZ(tile);
00324   uint z2 = GetTileZ(t->xy);
00325   if (z < z2) {
00326     if (HasBit(free_names, M(STR_SV_STNAME_VALLEY))) return STR_SV_STNAME_VALLEY;
00327   } else if (z > z2) {
00328     if (HasBit(free_names, M(STR_SV_STNAME_HEIGHTS))) return STR_SV_STNAME_HEIGHTS;
00329   }
00330 
00331   /* check direction compared to town */
00332   static const int8 _direction_and_table[] = {
00333     ~( (1 << M(STR_SV_STNAME_WEST))  | (1 << M(STR_SV_STNAME_EAST)) | (1 << M(STR_SV_STNAME_NORTH)) ),
00334     ~( (1 << M(STR_SV_STNAME_SOUTH)) | (1 << M(STR_SV_STNAME_WEST)) | (1 << M(STR_SV_STNAME_NORTH)) ),
00335     ~( (1 << M(STR_SV_STNAME_SOUTH)) | (1 << M(STR_SV_STNAME_EAST)) | (1 << M(STR_SV_STNAME_NORTH)) ),
00336     ~( (1 << M(STR_SV_STNAME_SOUTH)) | (1 << M(STR_SV_STNAME_WEST)) | (1 << M(STR_SV_STNAME_EAST)) ),
00337   };
00338 
00339   free_names &= _direction_and_table[
00340     (TileX(tile) < TileX(t->xy)) +
00341     (TileY(tile) < TileY(t->xy)) * 2];
00342 
00343   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));
00344   return (tmp == 0) ? STR_SV_STNAME_FALLBACK : (STR_SV_STNAME + FindFirstBit(tmp));
00345 }
00346 #undef M
00347 
00353 static Station *GetClosestDeletedStation(TileIndex tile)
00354 {
00355   uint threshold = 8;
00356   Station *best_station = NULL;
00357   Station *st;
00358 
00359   FOR_ALL_STATIONS(st) {
00360     if (!st->IsInUse() && st->owner == _current_company) {
00361       uint cur_dist = DistanceManhattan(tile, st->xy);
00362 
00363       if (cur_dist < threshold) {
00364         threshold = cur_dist;
00365         best_station = st;
00366       }
00367     }
00368   }
00369 
00370   return best_station;
00371 }
00372 
00373 
00374 void Station::GetTileArea(TileArea *ta, StationType type) const
00375 {
00376   switch (type) {
00377     case STATION_RAIL:
00378       *ta = this->train_station;
00379       return;
00380 
00381     case STATION_AIRPORT:
00382       ta->tile = this->airport_tile;
00383       ta->w    = this->Airport()->size_x;
00384       ta->h    = this->Airport()->size_y;
00385       return;
00386 
00387     case STATION_TRUCK:
00388       *ta = this->truck_station;
00389       return;
00390 
00391     case STATION_BUS:
00392       *ta = this->bus_station;
00393       return;
00394 
00395     case STATION_DOCK:
00396     case STATION_OILRIG:
00397       ta->tile = this->dock_tile;
00398       break;
00399 
00400     default: NOT_REACHED();
00401   }
00402 
00403   ta->w = 1;
00404   ta->h = 1;
00405 }
00406 
00410 void Station::UpdateVirtCoord()
00411 {
00412   Point pt = RemapCoords2(TileX(this->xy) * TILE_SIZE, TileY(this->xy) * TILE_SIZE);
00413 
00414   pt.y -= 32;
00415   if ((this->facilities & FACIL_AIRPORT) && this->airport_type == AT_OILRIG) pt.y -= 16;
00416 
00417   SetDParam(0, this->index);
00418   SetDParam(1, this->facilities);
00419   this->sign.UpdatePosition(pt.x, pt.y, STR_VIEWPORT_STATION);
00420 
00421   SetWindowDirty(WC_STATION_VIEW, this->index);
00422 }
00423 
00425 void UpdateAllStationVirtCoords()
00426 {
00427   BaseStation *st;
00428 
00429   FOR_ALL_BASE_STATIONS(st) {
00430     st->UpdateVirtCoord();
00431   }
00432 }
00433 
00438 static uint GetAcceptanceMask(const Station *st)
00439 {
00440   uint mask = 0;
00441 
00442   for (CargoID i = 0; i < NUM_CARGO; i++) {
00443     if (HasBit(st->goods[i].acceptance_pickup, GoodsEntry::ACCEPTANCE)) mask |= 1 << i;
00444   }
00445   return mask;
00446 }
00447 
00451 static void ShowRejectOrAcceptNews(const Station *st, uint num_items, CargoID *cargo, StringID msg)
00452 {
00453   for (uint i = 0; i < num_items; i++) {
00454     SetDParam(i + 1, CargoSpec::Get(cargo[i])->name);
00455   }
00456 
00457   SetDParam(0, st->index);
00458   AddNewsItem(msg, NS_ACCEPTANCE, NR_STATION, st->index);
00459 }
00460 
00468 CargoArray GetProductionAroundTiles(TileIndex tile, int w, int h, int rad)
00469 {
00470   CargoArray produced;
00471 
00472   int x = TileX(tile);
00473   int y = TileY(tile);
00474 
00475   /* expand the region by rad tiles on each side
00476    * while making sure that we remain inside the board. */
00477   int x2 = min(x + w + rad, MapSizeX());
00478   int x1 = max(x - rad, 0);
00479 
00480   int y2 = min(y + h + rad, MapSizeY());
00481   int y1 = max(y - rad, 0);
00482 
00483   assert(x1 < x2);
00484   assert(y1 < y2);
00485   assert(w > 0);
00486   assert(h > 0);
00487 
00488   TileArea ta(TileXY(x1, y1), TileXY(x2 - 1, y2 - 1));
00489 
00490   /* Loop over all tiles to get the produced cargo of
00491    * everything except industries */
00492   TILE_AREA_LOOP(tile, ta) AddProducedCargo(tile, produced);
00493 
00494   /* Loop over the industries. They produce cargo for
00495    * anything that is within 'rad' from their bounding
00496    * box. As such if you have e.g. a oil well the tile
00497    * area loop might not hit an industry tile while
00498    * the industry would produce cargo for the station.
00499    */
00500   const Industry *i;
00501   FOR_ALL_INDUSTRIES(i) {
00502     if (!ta.Intersects(i->location)) continue;
00503 
00504     for (uint j = 0; j < lengthof(i->produced_cargo); j++) {
00505       CargoID cargo = i->produced_cargo[j];
00506       if (cargo != CT_INVALID) produced[cargo]++;
00507     }
00508   }
00509 
00510   return produced;
00511 }
00512 
00521 CargoArray GetAcceptanceAroundTiles(TileIndex tile, int w, int h, int rad, uint32 *always_accepted)
00522 {
00523   CargoArray acceptance;
00524   if (always_accepted != NULL) *always_accepted = 0;
00525 
00526   int x = TileX(tile);
00527   int y = TileY(tile);
00528 
00529   /* expand the region by rad tiles on each side
00530    * while making sure that we remain inside the board. */
00531   int x2 = min(x + w + rad, MapSizeX());
00532   int y2 = min(y + h + rad, MapSizeY());
00533   int x1 = max(x - rad, 0);
00534   int y1 = max(y - rad, 0);
00535 
00536   assert(x1 < x2);
00537   assert(y1 < y2);
00538   assert(w > 0);
00539   assert(h > 0);
00540 
00541   for (int yc = y1; yc != y2; yc++) {
00542     for (int xc = x1; xc != x2; xc++) {
00543       TileIndex tile = TileXY(xc, yc);
00544       AddAcceptedCargo(tile, acceptance, always_accepted);
00545     }
00546   }
00547 
00548   return acceptance;
00549 }
00550 
00555 void UpdateStationAcceptance(Station *st, bool show_msg)
00556 {
00557   /* old accepted goods types */
00558   uint old_acc = GetAcceptanceMask(st);
00559 
00560   /* And retrieve the acceptance. */
00561   CargoArray acceptance;
00562   if (!st->rect.IsEmpty()) {
00563     acceptance = GetAcceptanceAroundTiles(
00564       TileXY(st->rect.left, st->rect.top),
00565       st->rect.right  - st->rect.left + 1,
00566       st->rect.bottom - st->rect.top  + 1,
00567       st->GetCatchmentRadius(),
00568       &st->always_accepted
00569     );
00570   }
00571 
00572   /* Adjust in case our station only accepts fewer kinds of goods */
00573   for (CargoID i = 0; i < NUM_CARGO; i++) {
00574     uint amt = min(acceptance[i], 15);
00575 
00576     /* Make sure the station can accept the goods type. */
00577     bool is_passengers = IsCargoInClass(i, CC_PASSENGERS);
00578     if ((!is_passengers && !(st->facilities & ~FACIL_BUS_STOP)) ||
00579         (is_passengers && !(st->facilities & ~FACIL_TRUCK_STOP))) {
00580       amt = 0;
00581     }
00582 
00583     SB(st->goods[i].acceptance_pickup, GoodsEntry::ACCEPTANCE, 1, amt >= 8);
00584   }
00585 
00586   /* Only show a message in case the acceptance was actually changed. */
00587   uint new_acc = GetAcceptanceMask(st);
00588   if (old_acc == new_acc) return;
00589 
00590   /* show a message to report that the acceptance was changed? */
00591   if (show_msg && st->owner == _local_company && st->IsInUse()) {
00592     /* List of accept and reject strings for different number of
00593      * cargo types */
00594     static const StringID accept_msg[] = {
00595       STR_NEWS_STATION_NOW_ACCEPTS_CARGO,
00596       STR_NEWS_STATION_NOW_ACCEPTS_CARGO_AND_CARGO,
00597     };
00598     static const StringID reject_msg[] = {
00599       STR_NEWS_STATION_NO_LONGER_ACCEPTS_CARGO,
00600       STR_NEWS_STATION_NO_LONGER_ACCEPTS_CARGO_OR_CARGO,
00601     };
00602 
00603     /* Array of accepted and rejected cargo types */
00604     CargoID accepts[2] = { CT_INVALID, CT_INVALID };
00605     CargoID rejects[2] = { CT_INVALID, CT_INVALID };
00606     uint num_acc = 0;
00607     uint num_rej = 0;
00608 
00609     /* Test each cargo type to see if its acceptange has changed */
00610     for (CargoID i = 0; i < NUM_CARGO; i++) {
00611       if (HasBit(new_acc, i)) {
00612         if (!HasBit(old_acc, i) && num_acc < lengthof(accepts)) {
00613           /* New cargo is accepted */
00614           accepts[num_acc++] = i;
00615         }
00616       } else {
00617         if (HasBit(old_acc, i) && num_rej < lengthof(rejects)) {
00618           /* Old cargo is no longer accepted */
00619           rejects[num_rej++] = i;
00620         }
00621       }
00622     }
00623 
00624     /* Show news message if there are any changes */
00625     if (num_acc > 0) ShowRejectOrAcceptNews(st, num_acc, accepts, accept_msg[num_acc - 1]);
00626     if (num_rej > 0) ShowRejectOrAcceptNews(st, num_rej, rejects, reject_msg[num_rej - 1]);
00627   }
00628 
00629   /* redraw the station view since acceptance changed */
00630   SetWindowWidgetDirty(WC_STATION_VIEW, st->index, SVW_ACCEPTLIST);
00631 }
00632 
00633 static void UpdateStationSignCoord(BaseStation *st)
00634 {
00635   const StationRect *r = &st->rect;
00636 
00637   if (r->IsEmpty()) return; // no tiles belong to this station
00638 
00639   /* clamp sign coord to be inside the station rect */
00640   st->xy = TileXY(ClampU(TileX(st->xy), r->left, r->right), ClampU(TileY(st->xy), r->top, r->bottom));
00641   st->UpdateVirtCoord();
00642 }
00643 
00649 static void DeleteStationIfEmpty(BaseStation *st)
00650 {
00651   if (!st->IsInUse()) {
00652     st->delete_ctr = 0;
00653     InvalidateWindowData(WC_STATION_LIST, st->owner, 0);
00654   }
00655   /* station remains but it probably lost some parts - station sign should stay in the station boundaries */
00656   UpdateStationSignCoord(st);
00657 }
00658 
00659 CommandCost ClearTile_Station(TileIndex tile, DoCommandFlag flags);
00660 
00672 CommandCost CheckFlatLandBelow(TileIndex tile, uint w, uint h, DoCommandFlag flags, uint invalid_dirs, StationID *station, bool check_clear = true, RailType rt = INVALID_RAILTYPE)
00673 {
00674   CommandCost cost(EXPENSES_CONSTRUCTION);
00675   int allowed_z = -1;
00676 
00677   TILE_LOOP(tile_cur, w, h, tile) {
00678     if (MayHaveBridgeAbove(tile_cur) && IsBridgeAbove(tile_cur)) {
00679       return_cmd_error(STR_ERROR_MUST_DEMOLISH_BRIDGE_FIRST);
00680     }
00681 
00682     if (!EnsureNoVehicleOnGround(tile_cur)) return CMD_ERROR;
00683 
00684     uint z;
00685     Slope tileh = GetTileSlope(tile_cur, &z);
00686 
00687     /* Prohibit building if
00688      *   1) The tile is "steep" (i.e. stretches two height levels)
00689      *   2) The tile is non-flat and the build_on_slopes switch is disabled
00690      */
00691     if (IsSteepSlope(tileh) ||
00692         ((!_settings_game.construction.build_on_slopes) && tileh != SLOPE_FLAT)) {
00693       return_cmd_error(STR_ERROR_FLAT_LAND_REQUIRED);
00694     }
00695 
00696     int flat_z = z;
00697     if (tileh != SLOPE_FLAT) {
00698       /* need to check so the entrance to the station is not pointing at a slope.
00699        * This must be valid for all station tiles, as the user can remove single station tiles. */
00700       if ((HasBit(invalid_dirs, DIAGDIR_NE) && !(tileh & SLOPE_NE)) ||
00701           (HasBit(invalid_dirs, DIAGDIR_SE) && !(tileh & SLOPE_SE)) ||
00702           (HasBit(invalid_dirs, DIAGDIR_SW) && !(tileh & SLOPE_SW)) ||
00703           (HasBit(invalid_dirs, DIAGDIR_NW) && !(tileh & SLOPE_NW))) {
00704         return_cmd_error(STR_ERROR_FLAT_LAND_REQUIRED);
00705       }
00706       cost.AddCost(_price[PR_BUILD_FOUNDATION]);
00707       flat_z += TILE_HEIGHT;
00708     }
00709 
00710     /* get corresponding flat level and make sure that all parts of the station have the same level. */
00711     if (allowed_z == -1) {
00712       /* first tile */
00713       allowed_z = flat_z;
00714     } else if (allowed_z != flat_z) {
00715       return_cmd_error(STR_ERROR_FLAT_LAND_REQUIRED);
00716     }
00717 
00718     /* if station is set, then we have special handling to allow building on top of already existing stations.
00719      * so station points to INVALID_STATION if we can build on any station.
00720      * Or it points to a station if we're only allowed to build on exactly that station. */
00721     if (station != NULL && IsTileType(tile_cur, MP_STATION)) {
00722       if (!IsRailStation(tile_cur)) {
00723         return ClearTile_Station(tile_cur, DC_AUTO); // get error message
00724       } else {
00725         StationID st = GetStationIndex(tile_cur);
00726         if (*station == INVALID_STATION) {
00727           *station = st;
00728         } else if (*station != st) {
00729           return_cmd_error(STR_ERROR_ADJOINS_MORE_THAN_ONE_EXISTING);
00730         }
00731       }
00732     } else if (check_clear) {
00733       /* Rail type is only valid when building a railway station; in station to
00734        * build isn't a rail station it's INVALID_RAILTYPE. */
00735       if (rt != INVALID_RAILTYPE &&
00736           IsPlainRailTile(tile_cur) && !HasSignals(tile_cur) &&
00737           HasPowerOnRail(GetRailType(tile_cur), rt)) {
00738         /* Allow overbuilding if the tile:
00739          *  - has rail, but no signals
00740          *  - it has exactly one track
00741          *  - the track is in line with the station
00742          *  - the current rail type has power on the to-be-built type (e.g. convert normal rail to el rail)
00743          */
00744         TrackBits tracks = GetTrackBits(tile_cur);
00745         Track track = RemoveFirstTrack(&tracks);
00746         Track expected_track = HasBit(invalid_dirs, DIAGDIR_NE) ? TRACK_X : TRACK_Y;
00747 
00748         if (tracks == TRACK_BIT_NONE && track == expected_track) {
00749           CommandCost ret = DoCommand(tile_cur, 0, track, flags, CMD_REMOVE_SINGLE_RAIL);
00750           if (CmdFailed(ret)) return ret;
00751           cost.AddCost(ret);
00752           /* With flags & ~DC_EXEC CmdLandscapeClear would fail since the rail still exists */
00753           continue;
00754         }
00755       }
00756       CommandCost ret = DoCommand(tile_cur, 0, 0, flags, CMD_LANDSCAPE_CLEAR);
00757       if (CmdFailed(ret)) return ret;
00758       cost.AddCost(ret);
00759     }
00760   }
00761 
00762   return cost;
00763 }
00764 
00772 bool CanExpandRailStation(const BaseStation *st, TileArea &new_ta, Axis axis)
00773 {
00774   TileArea cur_ta = st->train_station;
00775 
00776   if (_settings_game.station.nonuniform_stations) {
00777     /* determine new size of train station region.. */
00778     int x = min(TileX(cur_ta.tile), TileX(new_ta.tile));
00779     int y = min(TileY(cur_ta.tile), TileY(new_ta.tile));
00780     new_ta.w = max(TileX(cur_ta.tile) + cur_ta.w, TileX(new_ta.tile) + new_ta.w) - x;
00781     new_ta.h = max(TileY(cur_ta.tile) + cur_ta.h, TileY(new_ta.tile) + new_ta.h) - y;
00782     new_ta.tile = TileXY(x, y);
00783   } else {
00784     /* do not allow modifying non-uniform stations,
00785      * the uniform-stations code wouldn't handle it well */
00786     TILE_LOOP(t, cur_ta.w, cur_ta.h, cur_ta.tile) {
00787       if (!st->TileBelongsToRailStation(t)) { // there may be adjoined station
00788         _error_message = STR_ERROR_NONUNIFORM_STATIONS_DISALLOWED;
00789         return false;
00790       }
00791     }
00792 
00793     /* check so the orientation is the same */
00794     if (GetRailStationAxis(cur_ta.tile) != axis) {
00795       _error_message = STR_ERROR_NONUNIFORM_STATIONS_DISALLOWED;
00796       return false;
00797     }
00798 
00799     /* check if the new station adjoins the old station in either direction */
00800     if (cur_ta.w == new_ta.w && cur_ta.tile == new_ta.tile + TileDiffXY(0, new_ta.h)) {
00801       /* above */
00802       new_ta.h += cur_ta.h;
00803     } else if (cur_ta.w == new_ta.w && cur_ta.tile == new_ta.tile - TileDiffXY(0, cur_ta.h)) {
00804       /* below */
00805       new_ta.tile = cur_ta.tile;
00806       new_ta.h += new_ta.h;
00807     } else if (cur_ta.h == new_ta.h && cur_ta.tile == new_ta.tile + TileDiffXY(new_ta.w, 0)) {
00808       /* to the left */
00809       new_ta.w += cur_ta.w;
00810     } else if (cur_ta.h == new_ta.h && cur_ta.tile == new_ta.tile - TileDiffXY(cur_ta.w, 0)) {
00811       /* to the right */
00812       new_ta.tile = cur_ta.tile;
00813       new_ta.w += cur_ta.w;
00814     } else {
00815       _error_message = STR_ERROR_NONUNIFORM_STATIONS_DISALLOWED;
00816       return false;
00817     }
00818   }
00819   /* make sure the final size is not too big. */
00820   if (new_ta.w > _settings_game.station.station_spread || new_ta.h > _settings_game.station.station_spread) {
00821     _error_message = STR_ERROR_STATION_TOO_SPREAD_OUT;
00822     return false;
00823   }
00824 
00825   return true;
00826 }
00827 
00828 static inline byte *CreateSingle(byte *layout, int n)
00829 {
00830   int i = n;
00831   do *layout++ = 0; while (--i);
00832   layout[((n - 1) >> 1) - n] = 2;
00833   return layout;
00834 }
00835 
00836 static inline byte *CreateMulti(byte *layout, int n, byte b)
00837 {
00838   int i = n;
00839   do *layout++ = b; while (--i);
00840   if (n > 4) {
00841     layout[0 - n] = 0;
00842     layout[n - 1 - n] = 0;
00843   }
00844   return layout;
00845 }
00846 
00847 void GetStationLayout(byte *layout, int numtracks, int plat_len, const StationSpec *statspec)
00848 {
00849   if (statspec != NULL && statspec->lengths >= plat_len &&
00850       statspec->platforms[plat_len - 1] >= numtracks &&
00851       statspec->layouts[plat_len - 1][numtracks - 1]) {
00852     /* Custom layout defined, follow it. */
00853     memcpy(layout, statspec->layouts[plat_len - 1][numtracks - 1],
00854       plat_len * numtracks);
00855     return;
00856   }
00857 
00858   if (plat_len == 1) {
00859     CreateSingle(layout, numtracks);
00860   } else {
00861     if (numtracks & 1) layout = CreateSingle(layout, plat_len);
00862     numtracks >>= 1;
00863 
00864     while (--numtracks >= 0) {
00865       layout = CreateMulti(layout, plat_len, 4);
00866       layout = CreateMulti(layout, plat_len, 6);
00867     }
00868   }
00869 }
00870 
00882 template <class T, StringID error_message>
00883 CommandCost FindJoiningBaseStation(StationID existing_station, StationID station_to_join, bool adjacent, TileArea ta, T **st)
00884 {
00885   assert(*st == NULL);
00886   bool check_surrounding = true;
00887 
00888   if (_settings_game.station.adjacent_stations) {
00889     if (existing_station != INVALID_STATION) {
00890       if (adjacent && existing_station != station_to_join) {
00891         /* You can't build an adjacent station over the top of one that
00892          * already exists. */
00893         return_cmd_error(error_message);
00894       } else {
00895         /* Extend the current station, and don't check whether it will
00896          * be near any other stations. */
00897         *st = T::GetIfValid(existing_station);
00898         check_surrounding = (*st == NULL);
00899       }
00900     } else {
00901       /* There's no station here. Don't check the tiles surrounding this
00902        * one if the company wanted to build an adjacent station. */
00903       if (adjacent) check_surrounding = false;
00904     }
00905   }
00906 
00907   if (check_surrounding) {
00908     /* Make sure there are no similar stations around us. */
00909     if (!GetStationAround(ta, existing_station, st)) return CMD_ERROR;
00910   }
00911 
00912   /* Distant join */
00913   if (*st == NULL && station_to_join != INVALID_STATION) *st = T::GetIfValid(station_to_join);
00914 
00915   return CommandCost();;
00916 }
00917 
00927 static CommandCost FindJoiningStation(StationID existing_station, StationID station_to_join, bool adjacent, TileArea ta, Station **st)
00928 {
00929   return FindJoiningBaseStation<Station, STR_ERROR_MUST_REMOVE_RAILWAY_STATION_FIRST>(existing_station, station_to_join, adjacent, ta, st);
00930 }
00931 
00941 CommandCost FindJoiningWaypoint(StationID existing_waypoint, StationID waypoint_to_join, bool adjacent, TileArea ta, Waypoint **wp)
00942 {
00943   return FindJoiningBaseStation<Waypoint, STR_ERROR_MUST_REMOVE_RAILWAYPOINT_FIRST>(existing_waypoint, waypoint_to_join, adjacent, ta, wp);
00944 }
00945 
00963 CommandCost CmdBuildRailStation(TileIndex tile_org, DoCommandFlag flags, uint32 p1, uint32 p2, const char *text)
00964 {
00965   /* Unpack parameters */
00966   RailType rt    = (RailType)GB(p1, 0, 4);
00967   Axis axis      = Extract<Axis, 4>(p1);
00968   byte numtracks = GB(p1,  8, 8);
00969   byte plat_len  = GB(p1, 16, 8);
00970   bool adjacent  = HasBit(p1, 24);
00971 
00972   StationClassID spec_class = (StationClassID)GB(p2, 0, 8);
00973   byte spec_index           = GB(p2, 8, 8);
00974   StationID station_to_join = GB(p2, 16, 16);
00975 
00976   /* Does the authority allow this? */
00977   if (!CheckIfAuthorityAllowsNewStation(tile_org, flags)) return CMD_ERROR;
00978   if (!ValParamRailtype(rt)) return CMD_ERROR;
00979 
00980   /* Check if the given station class is valid */
00981   if ((uint)spec_class >= GetNumStationClasses()) return CMD_ERROR;
00982   if (spec_index >= GetNumCustomStations(spec_class)) return CMD_ERROR;
00983   if (plat_len == 0 || numtracks == 0) return CMD_ERROR;
00984 
00985   int w_org, h_org;
00986   if (axis == AXIS_X) {
00987     w_org = plat_len;
00988     h_org = numtracks;
00989   } else {
00990     h_org = plat_len;
00991     w_org = numtracks;
00992   }
00993 
00994   bool reuse = (station_to_join != NEW_STATION);
00995   if (!reuse) station_to_join = INVALID_STATION;
00996   bool distant_join = (station_to_join != INVALID_STATION);
00997 
00998   if (distant_join && (!_settings_game.station.distant_join_stations || !Station::IsValidID(station_to_join))) return CMD_ERROR;
00999 
01000   if (h_org > _settings_game.station.station_spread || w_org > _settings_game.station.station_spread) return CMD_ERROR;
01001 
01002   /* these values are those that will be stored in train_tile and station_platforms */
01003   TileArea new_location(tile_org, w_org, h_org);
01004 
01005   /* Make sure the area below consists of clear tiles. (OR tiles belonging to a certain rail station) */
01006   StationID est = INVALID_STATION;
01007   /* If DC_EXEC is in flag, do not want to pass it to CheckFlatLandBelow, because of a nice bug
01008    * for detail info, see:
01009    * https://sourceforge.net/tracker/index.php?func=detail&aid=1029064&group_id=103924&atid=636365 */
01010   CommandCost ret = CheckFlatLandBelow(tile_org, w_org, h_org, flags & ~DC_EXEC, 5 << axis, _settings_game.station.nonuniform_stations ? &est : NULL, true, rt);
01011   if (CmdFailed(ret)) return ret;
01012   CommandCost cost(EXPENSES_CONSTRUCTION, ret.GetCost() + (numtracks * _price[PR_BUILD_STATION_RAIL] + _price[PR_BUILD_STATION_RAIL_LENGTH]) * plat_len);
01013 
01014   Station *st = NULL;
01015   ret = FindJoiningStation(est, station_to_join, adjacent, new_location, &st);
01016   if (CmdFailed(ret)) return ret;
01017 
01018   /* See if there is a deleted station close to us. */
01019   if (st == NULL && reuse) st = GetClosestDeletedStation(tile_org);
01020 
01021   if (st != NULL) {
01022     /* Reuse an existing station. */
01023     if (st->owner != _current_company)
01024       return_cmd_error(STR_ERROR_TOO_CLOSE_TO_ANOTHER_STATION);
01025 
01026     if (st->train_station.tile != INVALID_TILE) {
01027       /* check if we want to expanding an already existing station? */
01028       if (!_settings_game.station.join_stations)
01029         return_cmd_error(STR_ERROR_TOO_CLOSE_TO_ANOTHER_RAILROAD);
01030       if (!CanExpandRailStation(st, new_location, axis))
01031         return CMD_ERROR;
01032     }
01033 
01034     /* XXX can't we pack this in the "else" part of the if above? */
01035     if (!st->rect.BeforeAddRect(tile_org, w_org, h_org, StationRect::ADD_TEST)) return CMD_ERROR;
01036   } else {
01037     /* allocate and initialize new station */
01038     if (!Station::CanAllocateItem()) return_cmd_error(STR_ERROR_TOO_MANY_STATIONS_LOADING);
01039 
01040     if (flags & DC_EXEC) {
01041       st = new Station(tile_org);
01042 
01043       st->town = ClosestTownFromTile(tile_org, UINT_MAX);
01044       st->string_id = GenerateStationName(st, tile_org, STATIONNAMING_RAIL);
01045 
01046       if (Company::IsValidID(_current_company)) {
01047         SetBit(st->town->have_ratings, _current_company);
01048       }
01049     }
01050   }
01051 
01052   /* Check if we can allocate a custom stationspec to this station */
01053   const StationSpec *statspec = GetCustomStationSpec(spec_class, spec_index);
01054   int specindex = AllocateSpecToStation(statspec, st, (flags & DC_EXEC) != 0);
01055   if (specindex == -1) return_cmd_error(STR_ERROR_TOO_MANY_STATION_SPECS);
01056 
01057   if (statspec != NULL) {
01058     /* Perform NewStation checks */
01059 
01060     /* Check if the station size is permitted */
01061     if (HasBit(statspec->disallowed_platforms, numtracks - 1) || HasBit(statspec->disallowed_lengths, plat_len - 1)) {
01062       return CMD_ERROR;
01063     }
01064 
01065     /* Check if the station is buildable */
01066     if (HasBit(statspec->callback_mask, CBM_STATION_AVAIL) && GB(GetStationCallback(CBID_STATION_AVAILABILITY, 0, 0, statspec, NULL, INVALID_TILE), 0, 8) == 0) {
01067       return CMD_ERROR;
01068     }
01069   }
01070 
01071   if (flags & DC_EXEC) {
01072     TileIndexDiff tile_delta;
01073     byte *layout_ptr;
01074     byte numtracks_orig;
01075     Track track;
01076 
01077     /* Now really clear the land below the station
01078      * It should never return CMD_ERROR.. but you never know ;)
01079      * (a bit strange function name for it, but it really does clear the land, when DC_EXEC is in flags) */
01080     ret = CheckFlatLandBelow(tile_org, w_org, h_org, flags, 5 << axis, _settings_game.station.nonuniform_stations ? &est : NULL, true, rt);
01081     if (CmdFailed(ret)) return ret;
01082 
01083     st->train_station = new_location;
01084     st->AddFacility(FACIL_TRAIN, new_location.tile);
01085 
01086     st->rect.BeforeAddRect(tile_org, w_org, h_org, StationRect::ADD_TRY);
01087 
01088     if (statspec != NULL) {
01089       /* Include this station spec's animation trigger bitmask
01090        * in the station's cached copy. */
01091       st->cached_anim_triggers |= statspec->anim_triggers;
01092     }
01093 
01094     tile_delta = (axis == AXIS_X ? TileDiffXY(1, 0) : TileDiffXY(0, 1));
01095     track = AxisToTrack(axis);
01096 
01097     layout_ptr = AllocaM(byte, numtracks * plat_len);
01098     GetStationLayout(layout_ptr, numtracks, plat_len, statspec);
01099 
01100     numtracks_orig = numtracks;
01101 
01102     SmallVector<Train*, 4> affected_vehicles;
01103     do {
01104       TileIndex tile = tile_org;
01105       int w = plat_len;
01106       do {
01107         byte layout = *layout_ptr++;
01108         if (IsRailStationTile(tile) && HasStationReservation(tile)) {
01109           /* Check for trains having a reservation for this tile. */
01110           Train *v = GetTrainForReservation(tile, AxisToTrack(GetRailStationAxis(tile)));
01111           if (v != NULL) {
01112             FreeTrainTrackReservation(v);
01113             *affected_vehicles.Append() = v;
01114             if (IsRailStationTile(v->tile)) SetRailStationPlatformReservation(v->tile, TrackdirToExitdir(v->GetVehicleTrackdir()), false);
01115             for (; v->Next() != NULL; v = v->Next()) { }
01116             if (IsRailStationTile(v->tile)) SetRailStationPlatformReservation(v->tile, TrackdirToExitdir(ReverseTrackdir(v->GetVehicleTrackdir())), false);
01117           }
01118         }
01119 
01120         /* Remove animation if overbuilding */
01121         DeleteAnimatedTile(tile);
01122         byte old_specindex = IsTileType(tile, MP_STATION) ? GetCustomStationSpecIndex(tile) : 0;
01123         MakeRailStation(tile, st->owner, st->index, axis, layout & ~1, rt);
01124         /* Free the spec if we overbuild something */
01125         DeallocateSpecFromStation(st, old_specindex);
01126 
01127         SetCustomStationSpecIndex(tile, specindex);
01128         SetStationTileRandomBits(tile, GB(Random(), 0, 4));
01129         SetStationAnimationFrame(tile, 0);
01130 
01131         if (statspec != NULL) {
01132           /* Use a fixed axis for GetPlatformInfo as our platforms / numtracks are always the right way around */
01133           uint32 platinfo = GetPlatformInfo(AXIS_X, 0, plat_len, numtracks_orig, plat_len - w, numtracks_orig - numtracks, false);
01134 
01135           /* As the station is not yet completely finished, the station does not yet exist. */
01136           uint16 callback = GetStationCallback(CBID_STATION_TILE_LAYOUT, platinfo, 0, statspec, NULL, tile);
01137           if (callback != CALLBACK_FAILED && callback < 8) SetStationGfx(tile, (callback & ~1) + axis);
01138 
01139           /* Trigger station animation -- after building? */
01140           StationAnimationTrigger(st, tile, STAT_ANIM_BUILT);
01141         }
01142 
01143         tile += tile_delta;
01144       } while (--w);
01145       AddTrackToSignalBuffer(tile_org, track, _current_company);
01146       YapfNotifyTrackLayoutChange(tile_org, track);
01147       tile_org += tile_delta ^ TileDiffXY(1, 1); // perpendicular to tile_delta
01148     } while (--numtracks);
01149 
01150     for (uint i = 0; i < affected_vehicles.Length(); ++i) {
01151       /* Restore reservations of trains. */
01152       Train *v = affected_vehicles[i];
01153       if (IsRailStationTile(v->tile)) SetRailStationPlatformReservation(v->tile, TrackdirToExitdir(v->GetVehicleTrackdir()), true);
01154       TryPathReserve(v, true, true);
01155       for (; v->Next() != NULL; v = v->Next()) { }
01156       if (IsRailStationTile(v->tile)) SetRailStationPlatformReservation(v->tile, TrackdirToExitdir(ReverseTrackdir(v->GetVehicleTrackdir())), true);
01157     }
01158 
01159     st->MarkTilesDirty(false);
01160     st->UpdateVirtCoord();
01161     UpdateStationAcceptance(st, false);
01162     st->RecomputeIndustriesNear();
01163     InvalidateWindowData(WC_SELECT_STATION, 0, 0);
01164     InvalidateWindowData(WC_STATION_LIST, st->owner, 0);
01165     SetWindowWidgetDirty(WC_STATION_VIEW, st->index, SVW_TRAINS);
01166   }
01167 
01168   return cost;
01169 }
01170 
01171 static void MakeRailStationAreaSmaller(BaseStation *st)
01172 {
01173   TileArea ta = st->train_station;
01174 
01175 restart:
01176 
01177   /* too small? */
01178   if (ta.w != 0 && ta.h != 0) {
01179     /* check the left side, x = constant, y changes */
01180     for (uint i = 0; !st->TileBelongsToRailStation(ta.tile + TileDiffXY(0, i));) {
01181       /* the left side is unused? */
01182       if (++i == ta.h) {
01183         ta.tile += TileDiffXY(1, 0);
01184         ta.w--;
01185         goto restart;
01186       }
01187     }
01188 
01189     /* check the right side, x = constant, y changes */
01190     for (uint i = 0; !st->TileBelongsToRailStation(ta.tile + TileDiffXY(ta.w - 1, i));) {
01191       /* the right side is unused? */
01192       if (++i == ta.h) {
01193         ta.w--;
01194         goto restart;
01195       }
01196     }
01197 
01198     /* check the upper side, y = constant, x changes */
01199     for (uint i = 0; !st->TileBelongsToRailStation(ta.tile + TileDiffXY(i, 0));) {
01200       /* the left side is unused? */
01201       if (++i == ta.w) {
01202         ta.tile += TileDiffXY(0, 1);
01203         ta.h--;
01204         goto restart;
01205       }
01206     }
01207 
01208     /* check the lower side, y = constant, x changes */
01209     for (uint i = 0; !st->TileBelongsToRailStation(ta.tile + TileDiffXY(i, ta.h - 1));) {
01210       /* the left side is unused? */
01211       if (++i == ta.w) {
01212         ta.h--;
01213         goto restart;
01214       }
01215     }
01216   } else {
01217     ta.Clear();
01218   }
01219 
01220   st->train_station = ta;
01221 }
01222 
01233 template <class T>
01234 CommandCost RemoveFromRailBaseStation(TileArea ta, SmallVector<T *, 4> &affected_stations, DoCommandFlag flags, Money removal_cost, bool keep_rail)
01235 {
01236   /* Count of the number of tiles removed */
01237   int quantity = 0;
01238   CommandCost total_cost(EXPENSES_CONSTRUCTION);
01239 
01240   /* Do the action for every tile into the area */
01241   TILE_AREA_LOOP(tile, ta) {
01242     /* Make sure the specified tile is a rail station */
01243     if (!HasStationTileRail(tile)) continue;
01244 
01245     /* If there is a vehicle on ground, do not allow to remove (flood) the tile */
01246     if (!EnsureNoVehicleOnGround(tile)) continue;
01247 
01248     /* Check ownership of station */
01249     T *st = T::GetByTile(tile);
01250     if (st == NULL) continue;
01251     if (_current_company != OWNER_WATER && !CheckOwnership(st->owner)) continue;
01252 
01253     /* Do not allow removing from stations if non-uniform stations are not enabled
01254      * The check must be here to give correct error message
01255      */
01256     if (!_settings_game.station.nonuniform_stations) return_cmd_error(STR_ERROR_NONUNIFORM_STATIONS_DISALLOWED);
01257 
01258     /* If we reached here, the tile is valid so increase the quantity of tiles we will remove */
01259     quantity++;
01260 
01261     if (flags & DC_EXEC) {
01262       /* read variables before the station tile is removed */
01263       uint specindex = GetCustomStationSpecIndex(tile);
01264       Track track = GetRailStationTrack(tile);
01265       Owner owner = GetTileOwner(tile);
01266       RailType rt = GetRailType(tile);
01267       Train *v = NULL;
01268 
01269       if (HasStationReservation(tile)) {
01270         v = GetTrainForReservation(tile, track);
01271         if (v != NULL) {
01272           /* Free train reservation. */
01273           FreeTrainTrackReservation(v);
01274           if (IsRailStationTile(v->tile)) SetRailStationPlatformReservation(v->tile, TrackdirToExitdir(v->GetVehicleTrackdir()), false);
01275           Vehicle *temp = v;
01276           for (; temp->Next() != NULL; temp = temp->Next()) { }
01277           if (IsRailStationTile(temp->tile)) SetRailStationPlatformReservation(temp->tile, TrackdirToExitdir(ReverseTrackdir(temp->GetVehicleTrackdir())), false);
01278         }
01279       }
01280 
01281       DoClearSquare(tile);
01282       if (keep_rail) MakeRailNormal(tile, owner, TrackToTrackBits(track), rt);
01283 
01284       st->rect.AfterRemoveTile(st, tile);
01285       AddTrackToSignalBuffer(tile, track, owner);
01286       YapfNotifyTrackLayoutChange(tile, track);
01287 
01288       DeallocateSpecFromStation(st, specindex);
01289 
01290       affected_stations.Include(st);
01291 
01292       if (v != NULL) {
01293         /* Restore station reservation. */
01294         if (IsRailStationTile(v->tile)) SetRailStationPlatformReservation(v->tile, TrackdirToExitdir(v->GetVehicleTrackdir()), true);
01295         TryPathReserve(v, true, true);
01296         for (; v->Next() != NULL; v = v->Next()) { }
01297         if (IsRailStationTile(v->tile)) SetRailStationPlatformReservation(v->tile, TrackdirToExitdir(ReverseTrackdir(v->GetVehicleTrackdir())), true);
01298       }
01299     }
01300     if (keep_rail) {
01301       /* Don't refund the 'steel' of the track! */
01302       total_cost.AddCost(-_price[PR_CLEAR_RAIL]);
01303     }
01304   }
01305 
01306   if (quantity == 0) return CMD_ERROR;
01307 
01308   for (T **stp = affected_stations.Begin(); stp != affected_stations.End(); stp++) {
01309     T *st = *stp;
01310 
01311     /* now we need to make the "spanned" area of the railway station smaller
01312      * if we deleted something at the edges.
01313      * we also need to adjust train_tile. */
01314     MakeRailStationAreaSmaller(st);
01315     UpdateStationSignCoord(st);
01316 
01317     /* if we deleted the whole station, delete the train facility. */
01318     if (st->train_station.tile == INVALID_TILE) {
01319       st->facilities &= ~FACIL_TRAIN;
01320       SetWindowWidgetDirty(WC_STATION_VIEW, st->index, SVW_TRAINS);
01321       st->UpdateVirtCoord();
01322       DeleteStationIfEmpty(st);
01323     }
01324   }
01325 
01326   total_cost.AddCost(quantity * removal_cost);
01327   return total_cost;
01328 }
01329 
01340 CommandCost CmdRemoveFromRailStation(TileIndex start, DoCommandFlag flags, uint32 p1, uint32 p2, const char *text)
01341 {
01342   TileIndex end = p1 == 0 ? start : p1;
01343   if (start >= MapSize() || end >= MapSize()) return CMD_ERROR;
01344 
01345   TileArea ta(start, end);
01346   SmallVector<Station *, 4> affected_stations;
01347 
01348   CommandCost ret = RemoveFromRailBaseStation(ta, affected_stations, flags, _price[PR_CLEAR_STATION_RAIL], HasBit(p2, 0));
01349   if (ret.Failed()) return ret;
01350 
01351   /* Do all station specific functions here. */
01352   for (Station **stp = affected_stations.Begin(); stp != affected_stations.End(); stp++) {
01353     Station *st = *stp;
01354 
01355     if (st->train_station.tile == INVALID_TILE) SetWindowWidgetDirty(WC_STATION_VIEW, st->index, SVW_TRAINS);
01356     st->MarkTilesDirty(false);
01357     st->RecomputeIndustriesNear();
01358   }
01359 
01360   /* Now apply the rail cost to the number that we deleted */
01361   return ret;
01362 }
01363 
01374 CommandCost CmdRemoveFromRailWaypoint(TileIndex start, DoCommandFlag flags, uint32 p1, uint32 p2, const char *text)
01375 {
01376   TileIndex end = p1 == 0 ? start : p1;
01377   if (start >= MapSize() || end >= MapSize()) return CMD_ERROR;
01378 
01379   TileArea ta(start, end);
01380   SmallVector<Waypoint *, 4> affected_stations;
01381 
01382   return RemoveFromRailBaseStation(ta, affected_stations, flags, _price[PR_CLEAR_WAYPOINT_RAIL], HasBit(p2, 0));
01383 }
01384 
01385 
01393 template <class T>
01394 CommandCost RemoveRailStation(T *st, DoCommandFlag flags)
01395 {
01396   /* Current company owns the station? */
01397   if (_current_company != OWNER_WATER && !CheckOwnership(st->owner)) return CMD_ERROR;
01398 
01399   /* determine width and height of platforms */
01400   TileArea ta = st->train_station;
01401 
01402   assert(ta.w != 0 && ta.h != 0);
01403 
01404   CommandCost cost(EXPENSES_CONSTRUCTION);
01405   /* clear all areas of the station */
01406   TILE_AREA_LOOP(tile, ta) {
01407     /* for nonuniform stations, only remove tiles that are actually train station tiles */
01408     if (!st->TileBelongsToRailStation(tile)) continue;
01409 
01410     if (!EnsureNoVehicleOnGround(tile)) return CMD_ERROR;
01411 
01412     cost.AddCost(_price[PR_CLEAR_STATION_RAIL]);
01413     if (flags & DC_EXEC) {
01414       /* read variables before the station tile is removed */
01415       Track track = GetRailStationTrack(tile);
01416       Owner owner = GetTileOwner(tile); // _current_company can be OWNER_WATER
01417       Train *v = NULL;
01418       if (HasStationReservation(tile)) {
01419         v = GetTrainForReservation(tile, track);
01420         if (v != NULL) FreeTrainTrackReservation(v);
01421       }
01422       DoClearSquare(tile);
01423       AddTrackToSignalBuffer(tile, track, owner);
01424       YapfNotifyTrackLayoutChange(tile, track);
01425       if (v != NULL) TryPathReserve(v, true);
01426     }
01427   }
01428 
01429   if (flags & DC_EXEC) {
01430     st->rect.AfterRemoveRect(st, st->train_station.tile, st->train_station.w, st->train_station.h);
01431 
01432     st->train_station.Clear();
01433 
01434     st->facilities &= ~FACIL_TRAIN;
01435 
01436     free(st->speclist);
01437     st->num_specs = 0;
01438     st->speclist  = NULL;
01439     st->cached_anim_triggers = 0;
01440 
01441     SetWindowWidgetDirty(WC_STATION_VIEW, st->index, SVW_TRAINS);
01442     st->UpdateVirtCoord();
01443     DeleteStationIfEmpty(st);
01444   }
01445 
01446   return cost;
01447 }
01448 
01455 static CommandCost RemoveRailStation(TileIndex tile, DoCommandFlag flags)
01456 {
01457   /* if there is flooding and non-uniform stations are enabled, remove platforms tile by tile */
01458   if (_current_company == OWNER_WATER && _settings_game.station.nonuniform_stations) {
01459     return DoCommand(tile, 0, 0, DC_EXEC, CMD_REMOVE_FROM_RAIL_STATION);
01460   }
01461 
01462   Station *st = Station::GetByTile(tile);
01463   CommandCost cost = RemoveRailStation(st, flags);
01464 
01465   if (flags & DC_EXEC) st->RecomputeIndustriesNear();
01466 
01467   return cost;
01468 }
01469 
01476 static CommandCost RemoveRailWaypoint(TileIndex tile, DoCommandFlag flags)
01477 {
01478   /* if there is flooding and non-uniform stations are enabled, remove waypoints tile by tile */
01479   if (_current_company == OWNER_WATER && _settings_game.station.nonuniform_stations) {
01480     return DoCommand(tile, 0, 0, DC_EXEC, CMD_REMOVE_FROM_RAIL_WAYPOINT);
01481   }
01482 
01483   return RemoveRailStation(Waypoint::GetByTile(tile), flags);
01484 }
01485 
01486 
01492 static RoadStop **FindRoadStopSpot(bool truck_station, Station *st)
01493 {
01494   RoadStop **primary_stop = (truck_station) ? &st->truck_stops : &st->bus_stops;
01495 
01496   if (*primary_stop == NULL) {
01497     /* we have no roadstop of the type yet, so write a "primary stop" */
01498     return primary_stop;
01499   } else {
01500     /* there are stops already, so append to the end of the list */
01501     RoadStop *stop = *primary_stop;
01502     while (stop->next != NULL) stop = stop->next;
01503     return &stop->next;
01504   }
01505 }
01506 
01519 CommandCost CmdBuildRoadStop(TileIndex tile, DoCommandFlag flags, uint32 p1, uint32 p2, const char *text)
01520 {
01521   bool type = HasBit(p2, 0);
01522   bool is_drive_through = HasBit(p2, 1);
01523   bool build_over_road  = is_drive_through && IsNormalRoadTile(tile);
01524   RoadTypes rts = (RoadTypes)GB(p2, 2, 2);
01525   StationID station_to_join = GB(p2, 16, 16);
01526   bool reuse = (station_to_join != NEW_STATION);
01527   if (!reuse) station_to_join = INVALID_STATION;
01528   bool distant_join = (station_to_join != INVALID_STATION);
01529   Owner tram_owner = _current_company;
01530   Owner road_owner = _current_company;
01531 
01532   if (distant_join && (!_settings_game.station.distant_join_stations || !Station::IsValidID(station_to_join))) return CMD_ERROR;
01533 
01534   if (!AreValidRoadTypes(rts) || !HasRoadTypesAvail(_current_company, rts)) return CMD_ERROR;
01535 
01536   /* Trams only have drive through stops */
01537   if (!is_drive_through && HasBit(rts, ROADTYPE_TRAM)) return CMD_ERROR;
01538 
01539   /* Saveguard the parameters */
01540   if (!IsValidDiagDirection((DiagDirection)p1)) return CMD_ERROR;
01541   /* If it is a drive-through stop check for valid axis */
01542   if (is_drive_through && !IsValidAxis((Axis)p1)) return CMD_ERROR;
01543   /* Road bits in the wrong direction */
01544   if (build_over_road && (GetAllRoadBits(tile) & ((Axis)p1 == AXIS_X ? ROAD_Y : ROAD_X)) != 0) return_cmd_error(STR_ERROR_DRIVE_THROUGH_DIRECTION);
01545 
01546   if (!CheckIfAuthorityAllowsNewStation(tile, flags)) return CMD_ERROR;
01547 
01548   RoadTypes cur_rts = IsNormalRoadTile(tile) ? GetRoadTypes(tile) : ROADTYPES_NONE;
01549   uint num_roadbits = 0;
01550   /* Not allowed to build over this road */
01551   if (build_over_road) {
01552     /* there is a road, check if we can build road+tram stop over it */
01553     if (HasBit(cur_rts, ROADTYPE_ROAD)) {
01554       road_owner = GetRoadOwner(tile, ROADTYPE_ROAD);
01555       if (road_owner == OWNER_TOWN) {
01556         if (!_settings_game.construction.road_stop_on_town_road) return_cmd_error(STR_ERROR_DRIVE_THROUGH_ON_TOWN_ROAD);
01557       } else if (!_settings_game.construction.road_stop_on_competitor_road && road_owner != OWNER_NONE && !CheckOwnership(road_owner)) {
01558         return CMD_ERROR;
01559       }
01560       num_roadbits += CountBits(GetRoadBits(tile, ROADTYPE_ROAD));
01561     }
01562 
01563     /* there is a tram, check if we can build road+tram stop over it */
01564     if (HasBit(cur_rts, ROADTYPE_TRAM)) {
01565       tram_owner = GetRoadOwner(tile, ROADTYPE_TRAM);
01566       if (!_settings_game.construction.road_stop_on_competitor_road && tram_owner != OWNER_NONE && !CheckOwnership(tram_owner)) {
01567         return CMD_ERROR;
01568       }
01569       num_roadbits += CountBits(GetRoadBits(tile, ROADTYPE_TRAM));
01570     }
01571 
01572     /* Don't allow building the roadstop when vehicles are already driving on it */
01573     if (!EnsureNoVehicleOnGround(tile)) return CMD_ERROR;
01574 
01575     /* Do not remove roadtypes! */
01576     rts |= cur_rts;
01577   }
01578 
01579   CommandCost cost = CheckFlatLandBelow(tile, 1, 1, flags, is_drive_through ? 5 << p1 : 1 << p1, NULL, !build_over_road);
01580   if (CmdFailed(cost)) return cost;
01581   uint roadbits_to_build = CountBits(rts) * 2 - num_roadbits;
01582   cost.AddCost(_price[PR_BUILD_ROAD] * roadbits_to_build);
01583 
01584   Station *st = NULL;
01585   CommandCost ret = FindJoiningStation(INVALID_STATION, station_to_join, HasBit(p2, 5), TileArea(tile, 1, 1), &st);
01586   if (CmdFailed(ret)) return ret;
01587 
01588   /* Find a deleted station close to us */
01589   if (st == NULL && reuse) st = GetClosestDeletedStation(tile);
01590 
01591   /* give us a road stop in the list, and check if something went wrong */
01592   if (!RoadStop::CanAllocateItem()) return_cmd_error(type ? STR_ERROR_TOO_MANY_TRUCK_STOPS : STR_ERROR_TOO_MANY_BUS_STOPS);
01593 
01594   if (st != NULL) {
01595     if (st->owner != _current_company) {
01596       return_cmd_error(STR_ERROR_TOO_CLOSE_TO_ANOTHER_STATION);
01597     }
01598 
01599     if (!st->rect.BeforeAddTile(tile, StationRect::ADD_TEST)) return CMD_ERROR;
01600   } else {
01601     /* allocate and initialize new station */
01602     if (!Station::CanAllocateItem()) return_cmd_error(STR_ERROR_TOO_MANY_STATIONS_LOADING);
01603 
01604     if (flags & DC_EXEC) {
01605       st = new Station(tile);
01606 
01607       st->town = ClosestTownFromTile(tile, UINT_MAX);
01608       st->string_id = GenerateStationName(st, tile, STATIONNAMING_ROAD);
01609 
01610       if (Company::IsValidID(_current_company)) {
01611         SetBit(st->town->have_ratings, _current_company);
01612       }
01613     }
01614   }
01615 
01616   cost.AddCost(_price[type ? PR_BUILD_STATION_TRUCK : PR_BUILD_STATION_BUS]);
01617 
01618   if (flags & DC_EXEC) {
01619     RoadStop *road_stop = new RoadStop(tile);
01620     /* Insert into linked list of RoadStops */
01621     RoadStop **currstop = FindRoadStopSpot(type, st);
01622     *currstop = road_stop;
01623 
01624     if (type) {
01625       st->truck_station.Add(tile);
01626     } else {
01627       st->bus_station.Add(tile);
01628     }
01629 
01630     /* initialize an empty station */
01631     st->AddFacility((type) ? FACIL_TRUCK_STOP : FACIL_BUS_STOP, tile);
01632 
01633     st->rect.BeforeAddTile(tile, StationRect::ADD_TRY);
01634 
01635     RoadStopType rs_type = type ? ROADSTOP_TRUCK : ROADSTOP_BUS;
01636     if (is_drive_through) {
01637       MakeDriveThroughRoadStop(tile, st->owner, road_owner, tram_owner, st->index, rs_type, rts, (Axis)p1);
01638       road_stop->MakeDriveThrough();
01639     } else {
01640       MakeRoadStop(tile, st->owner, st->index, rs_type, rts, (DiagDirection)p1);
01641     }
01642 
01643     st->UpdateVirtCoord();
01644     UpdateStationAcceptance(st, false);
01645     st->RecomputeIndustriesNear();
01646     InvalidateWindowData(WC_SELECT_STATION, 0, 0);
01647     InvalidateWindowData(WC_STATION_LIST, st->owner, 0);
01648     SetWindowWidgetDirty(WC_STATION_VIEW, st->index, SVW_ROADVEHS);
01649   }
01650   return cost;
01651 }
01652 
01653 
01654 static Vehicle *ClearRoadStopStatusEnum(Vehicle *v, void *)
01655 {
01656   if (v->type == VEH_ROAD) {
01657     /* Okay... we are a road vehicle on a drive through road stop.
01658      * But that road stop has just been removed, so we need to make
01659      * sure we are in a valid state... however, vehicles can also
01660      * turn on road stop tiles, so only clear the 'road stop' state
01661      * bits and only when the state was 'in road stop', otherwise
01662      * we'll end up clearing the turn around bits. */
01663     RoadVehicle *rv = RoadVehicle::From(v);
01664     if (HasBit(rv->state, RVS_IN_DT_ROAD_STOP)) rv->state &= RVSB_ROAD_STOP_TRACKDIR_MASK;
01665   }
01666 
01667   return NULL;
01668 }
01669 
01670 
01677 static CommandCost RemoveRoadStop(TileIndex tile, DoCommandFlag flags)
01678 {
01679   Station *st = Station::GetByTile(tile);
01680 
01681   if (_current_company != OWNER_WATER && !CheckOwnership(st->owner)) {
01682     return CMD_ERROR;
01683   }
01684 
01685   bool is_truck = IsTruckStop(tile);
01686 
01687   RoadStop **primary_stop;
01688   RoadStop *cur_stop;
01689   if (is_truck) { // truck stop
01690     primary_stop = &st->truck_stops;
01691     cur_stop = RoadStop::GetByTile(tile, ROADSTOP_TRUCK);
01692   } else {
01693     primary_stop = &st->bus_stops;
01694     cur_stop = RoadStop::GetByTile(tile, ROADSTOP_BUS);
01695   }
01696 
01697   assert(cur_stop != NULL);
01698 
01699   /* don't do the check for drive-through road stops when company bankrupts */
01700   if (IsDriveThroughStopTile(tile) && (flags & DC_BANKRUPT)) {
01701     /* remove the 'going through road stop' status from all vehicles on that tile */
01702     if (flags & DC_EXEC) FindVehicleOnPos(tile, NULL, &ClearRoadStopStatusEnum);
01703   } else {
01704     if (!EnsureNoVehicleOnGround(tile)) return CMD_ERROR;
01705   }
01706 
01707   if (flags & DC_EXEC) {
01708     if (*primary_stop == cur_stop) {
01709       /* removed the first stop in the list */
01710       *primary_stop = cur_stop->next;
01711       /* removed the only stop? */
01712       if (*primary_stop == NULL) {
01713         st->facilities &= (is_truck ? ~FACIL_TRUCK_STOP : ~FACIL_BUS_STOP);
01714       }
01715     } else {
01716       /* tell the predecessor in the list to skip this stop */
01717       RoadStop *pred = *primary_stop;
01718       while (pred->next != cur_stop) pred = pred->next;
01719       pred->next = cur_stop->next;
01720     }
01721 
01722     if (IsDriveThroughStopTile(tile)) {
01723       /* Clears the tile for us */
01724       cur_stop->ClearDriveThrough();
01725     } else {
01726       DoClearSquare(tile);
01727     }
01728 
01729     SetWindowWidgetDirty(WC_STATION_VIEW, st->index, SVW_ROADVEHS);
01730     delete cur_stop;
01731 
01732     /* Make sure no vehicle is going to the old roadstop */
01733     RoadVehicle *v;
01734     FOR_ALL_ROADVEHICLES(v) {
01735       if (v->First() == v && v->current_order.IsType(OT_GOTO_STATION) &&
01736           v->dest_tile == tile) {
01737         v->dest_tile = v->GetOrderStationLocation(st->index);
01738       }
01739     }
01740 
01741     st->rect.AfterRemoveTile(st, tile);
01742 
01743     st->UpdateVirtCoord();
01744     st->RecomputeIndustriesNear();
01745     DeleteStationIfEmpty(st);
01746 
01747     /* Update the tile area of the truck/bus stop */
01748     if (is_truck) {
01749       st->truck_station.Clear();
01750       for (const RoadStop *rs = st->truck_stops; rs != NULL; rs = rs->next) st->truck_station.Add(rs->xy);
01751     } else {
01752       st->bus_station.Clear();
01753       for (const RoadStop *rs = st->bus_stops; rs != NULL; rs = rs->next) st->bus_station.Add(rs->xy);
01754     }
01755   }
01756 
01757   return CommandCost(EXPENSES_CONSTRUCTION, _price[is_truck ? PR_CLEAR_STATION_TRUCK : PR_CLEAR_STATION_BUS]);
01758 }
01759 
01768 CommandCost CmdRemoveRoadStop(TileIndex tile, DoCommandFlag flags, uint32 p1, uint32 p2, const char *text)
01769 {
01770   /* Make sure the specified tile is a road stop of the correct type */
01771   if (!IsTileType(tile, MP_STATION) || !IsRoadStop(tile) || (uint32)GetRoadStopType(tile) != GB(p2, 0, 1)) return CMD_ERROR;
01772 
01773   /* Save the stop info before it is removed */
01774   bool is_drive_through = IsDriveThroughStopTile(tile);
01775   RoadTypes rts = GetRoadTypes(tile);
01776   RoadBits road_bits = IsDriveThroughStopTile(tile) ?
01777       ((GetRoadStopDir(tile) == DIAGDIR_NE) ? ROAD_X : ROAD_Y) :
01778       DiagDirToRoadBits(GetRoadStopDir(tile));
01779 
01780   Owner road_owner = GetRoadOwner(tile, ROADTYPE_ROAD);
01781   Owner tram_owner = GetRoadOwner(tile, ROADTYPE_TRAM);
01782   CommandCost ret = RemoveRoadStop(tile, flags);
01783 
01784   /* If the stop was a drive-through stop replace the road */
01785   if ((flags & DC_EXEC) && CmdSucceeded(ret) && is_drive_through) {
01786     /* Rebuild the drive throuhg road stop. As a road stop can only be
01787      * removed by the owner of the roadstop, _current_company is the
01788      * owner of the road stop. */
01789     MakeRoadNormal(tile, road_bits, rts, ClosestTownFromTile(tile, UINT_MAX)->index,
01790         road_owner, tram_owner);
01791   }
01792 
01793   return ret;
01794 }
01795 
01803 static uint GetMinimalAirportDistanceToTile(const AirportFTAClass *afc, TileIndex town_tile, TileIndex airport_tile)
01804 {
01805   uint ttx = TileX(town_tile); // X, Y of town
01806   uint tty = TileY(town_tile);
01807 
01808   uint atx = TileX(airport_tile); // X, Y of northern airport corner
01809   uint aty = TileY(airport_tile);
01810 
01811   uint btx = TileX(airport_tile) + afc->size_x - 1; // X, Y of southern corner
01812   uint bty = TileY(airport_tile) + afc->size_y - 1;
01813 
01814   /* if ttx < atx, dx = atx - ttx
01815    * if atx <= ttx <= btx, dx = 0
01816    * else, dx = ttx - btx (similiar for dy) */
01817   uint dx = ttx < atx ? atx - ttx : (ttx <= btx ? 0 : ttx - btx);
01818   uint dy = tty < aty ? aty - tty : (tty <= bty ? 0 : tty - bty);
01819 
01820   return dx + dy;
01821 }
01822 
01831 uint8 GetAirportNoiseLevelForTown(const AirportFTAClass *afc, TileIndex town_tile, TileIndex tile)
01832 {
01833   /* 0 cannot be accounted, and 1 is the lowest that can be reduced from town.
01834    * So no need to go any further*/
01835   if (afc->noise_level < 2) return afc->noise_level;
01836 
01837   uint distance = GetMinimalAirportDistanceToTile(afc, town_tile, tile);
01838 
01839   /* The steps for measuring noise reduction are based on the "magical" (and arbitrary) 8 base distance
01840    * adding the town_council_tolerance 4 times, as a way to graduate, depending of the tolerance.
01841    * Basically, it says that the less tolerant a town is, the bigger the distance before
01842    * an actual decrease can be granted */
01843   uint8 town_tolerance_distance = 8 + (_settings_game.difficulty.town_council_tolerance * 4);
01844 
01845   /* now, we want to have the distance segmented using the distance judged bareable by town
01846    * This will give us the coefficient of reduction the distance provides. */
01847   uint noise_reduction = distance / town_tolerance_distance;
01848 
01849   /* If the noise reduction equals the airport noise itself, don't give it for free.
01850    * Otherwise, simply reduce the airport's level. */
01851   return noise_reduction >= afc->noise_level ? 1 : afc->noise_level - noise_reduction;
01852 }
01853 
01861 Town *AirportGetNearestTown(const AirportFTAClass *afc, TileIndex airport_tile)
01862 {
01863   Town *t, *nearest = NULL;
01864   uint add = afc->size_x + afc->size_y - 2; // GetMinimalAirportDistanceToTile can differ from DistanceManhattan by this much
01865   uint mindist = UINT_MAX - add; // prevent overflow
01866   FOR_ALL_TOWNS(t) {
01867     if (DistanceManhattan(t->xy, airport_tile) < mindist + add) { // avoid calling GetMinimalAirportDistanceToTile too often
01868       uint dist = GetMinimalAirportDistanceToTile(afc, t->xy, airport_tile);
01869       if (dist < mindist) {
01870         nearest = t;
01871         mindist = dist;
01872       }
01873     }
01874   }
01875 
01876   return nearest;
01877 }
01878 
01879 
01881 void UpdateAirportsNoise()
01882 {
01883   Town *t;
01884   const Station *st;
01885 
01886   FOR_ALL_TOWNS(t) t->noise_reached = 0;
01887 
01888   FOR_ALL_STATIONS(st) {
01889     if (st->airport_tile != INVALID_TILE) {
01890       const AirportFTAClass *afc = GetAirport(st->airport_type);
01891       Town *nearest = AirportGetNearestTown(afc, st->airport_tile);
01892       nearest->noise_reached += GetAirportNoiseLevelForTown(afc, nearest->xy, st->airport_tile);
01893     }
01894   }
01895 }
01896 
01907 CommandCost CmdBuildAirport(TileIndex tile, DoCommandFlag flags, uint32 p1, uint32 p2, const char *text)
01908 {
01909   bool airport_upgrade = true;
01910   StationID station_to_join = GB(p2, 16, 16);
01911   bool reuse = (station_to_join != NEW_STATION);
01912   if (!reuse) station_to_join = INVALID_STATION;
01913   bool distant_join = (station_to_join != INVALID_STATION);
01914 
01915   if (distant_join && (!_settings_game.station.distant_join_stations || !Station::IsValidID(station_to_join))) return CMD_ERROR;
01916 
01917   if (p1 >= NUM_AIRPORTS) return CMD_ERROR;
01918 
01919   if (!CheckIfAuthorityAllowsNewStation(tile, flags)) {
01920     return CMD_ERROR;
01921   }
01922 
01923   /* Check if a valid, buildable airport was chosen for construction */
01924   const AirportFTAClass *afc = GetAirport(p1);
01925   if (!afc->IsAvailable()) return CMD_ERROR;
01926 
01927   Town *t = ClosestTownFromTile(tile, UINT_MAX);
01928   int w = afc->size_x;
01929   int h = afc->size_y;
01930 
01931   if (w > _settings_game.station.station_spread || h > _settings_game.station.station_spread) {
01932     _error_message = STR_ERROR_STATION_TOO_SPREAD_OUT;
01933     return CMD_ERROR;
01934   }
01935 
01936   CommandCost cost = CheckFlatLandBelow(tile, w, h, flags, 0, NULL);
01937   if (CmdFailed(cost)) return cost;
01938 
01939   /* Go get the final noise level, that is base noise minus factor from distance to town center */
01940   Town *nearest = AirportGetNearestTown(afc, tile);
01941   uint newnoise_level = GetAirportNoiseLevelForTown(afc, nearest->xy, tile);
01942 
01943   /* Check if local auth would allow a new airport */
01944   StringID authority_refuse_message = STR_NULL;
01945 
01946   if (_settings_game.economy.station_noise_level) {
01947     /* do not allow to build a new airport if this raise the town noise over the maximum allowed by town */
01948     if ((nearest->noise_reached + newnoise_level) > nearest->MaxTownNoise()) {
01949       authority_refuse_message = STR_ERROR_LOCAL_AUTHORITY_REFUSES_NOISE;
01950     }
01951   } else {
01952     uint num = 0;
01953     const Station *st;
01954     FOR_ALL_STATIONS(st) {
01955       if (st->town == t && (st->facilities & FACIL_AIRPORT) && st->airport_type != AT_OILRIG) num++;
01956     }
01957     if (num >= 2) {
01958       authority_refuse_message = STR_ERROR_LOCAL_AUTHORITY_REFUSES_AIRPORT;
01959     }
01960   }
01961 
01962   if (authority_refuse_message != STR_NULL) {
01963     SetDParam(0, t->index);
01964     return_cmd_error(authority_refuse_message);
01965   }
01966 
01967   Station *st = NULL;
01968   CommandCost ret = FindJoiningStation(INVALID_STATION, station_to_join, HasBit(p2, 0), TileArea(tile, w, h), &st);
01969   if (CmdFailed(ret)) return ret;
01970 
01971   /* Distant join */
01972   if (st == NULL && distant_join) st = Station::GetIfValid(station_to_join);
01973 
01974   /* Find a deleted station close to us */
01975   if (st == NULL && reuse) st = GetClosestDeletedStation(tile);
01976 
01977   if (st != NULL) {
01978     if (st->owner != _current_company) {
01979       return_cmd_error(STR_ERROR_TOO_CLOSE_TO_ANOTHER_STATION);
01980     }
01981 
01982     if (!st->rect.BeforeAddRect(tile, w, h, StationRect::ADD_TEST)) return CMD_ERROR;
01983 
01984     if (st->airport_tile != INVALID_TILE) {
01985       return_cmd_error(STR_ERROR_TOO_CLOSE_TO_ANOTHER_AIRPORT);
01986     }
01987   } else {
01988     airport_upgrade = false;
01989 
01990     /* allocate and initialize new station */
01991     if (!Station::CanAllocateItem()) return_cmd_error(STR_ERROR_TOO_MANY_STATIONS_LOADING);
01992 
01993     if (flags & DC_EXEC) {
01994       st = new Station(tile);
01995 
01996       st->town = t;
01997       st->string_id = GenerateStationName(st, tile, !(afc->flags & AirportFTAClass::AIRPLANES) ? STATIONNAMING_HELIPORT : STATIONNAMING_AIRPORT);
01998 
01999       if (Company::IsValidID(_current_company)) {
02000         SetBit(st->town->have_ratings, _current_company);
02001       }
02002     }
02003   }
02004 
02005   cost.AddCost(_price[PR_BUILD_STATION_AIRPORT] * w * h);
02006 
02007   if (flags & DC_EXEC) {
02008     /* Always add the noise, so there will be no need to recalculate when option toggles */
02009     nearest->noise_reached += newnoise_level;
02010 
02011     st->airport_tile = tile;
02012     st->AddFacility(FACIL_AIRPORT, tile);
02013     st->airport_type = (byte)p1;
02014     st->airport_flags = 0;
02015 
02016     st->rect.BeforeAddRect(tile, w, h, StationRect::ADD_TRY);
02017 
02018     /* if airport was demolished while planes were en-route to it, the
02019      * positions can no longer be the same (v->u.air.pos), since different
02020      * airports have different indexes. So update all planes en-route to this
02021      * airport. Only update if
02022      * 1. airport is upgraded
02023      * 2. airport is added to existing station (unfortunately unavoideable)
02024      */
02025     if (airport_upgrade) UpdateAirplanesOnNewStation(st);
02026 
02027     {
02028       const byte *b = _airport_sections[p1];
02029 
02030       TILE_LOOP(tile_cur, w, h, tile) {
02031         MakeAirport(tile_cur, st->owner, st->index, *b);
02032         b++;
02033       }
02034     }
02035 
02036     st->UpdateVirtCoord();
02037     UpdateStationAcceptance(st, false);
02038     st->RecomputeIndustriesNear();
02039     InvalidateWindowData(WC_SELECT_STATION, 0, 0);
02040     InvalidateWindowData(WC_STATION_LIST, st->owner, 0);
02041     SetWindowWidgetDirty(WC_STATION_VIEW, st->index, SVW_PLANES);
02042 
02043     if (_settings_game.economy.station_noise_level) {
02044       SetWindowDirty(WC_TOWN_VIEW, st->town->index);
02045     }
02046   }
02047 
02048   return cost;
02049 }
02050 
02057 static CommandCost RemoveAirport(TileIndex tile, DoCommandFlag flags)
02058 {
02059   Station *st = Station::GetByTile(tile);
02060 
02061   if (_current_company != OWNER_WATER && !CheckOwnership(st->owner)) {
02062     return CMD_ERROR;
02063   }
02064 
02065   tile = st->airport_tile;
02066 
02067   const AirportFTAClass *afc = st->Airport();
02068   int w = afc->size_x;
02069   int h = afc->size_y;
02070 
02071   CommandCost cost(EXPENSES_CONSTRUCTION, w * h * _price[PR_CLEAR_STATION_AIRPORT]);
02072 
02073   const Aircraft *a;
02074   FOR_ALL_AIRCRAFT(a) {
02075     if (!a->IsNormalAircraft()) continue;
02076     if (a->targetairport == st->index && a->state != FLYING) return CMD_ERROR;
02077   }
02078 
02079   TILE_LOOP(tile_cur, w, h, tile) {
02080     if (!EnsureNoVehicleOnGround(tile_cur)) return CMD_ERROR;
02081 
02082     if (flags & DC_EXEC) {
02083       DeleteAnimatedTile(tile_cur);
02084       DoClearSquare(tile_cur);
02085     }
02086   }
02087 
02088   if (flags & DC_EXEC) {
02089     for (uint i = 0; i < afc->nof_depots; ++i) {
02090       DeleteWindowById(
02091         WC_VEHICLE_DEPOT, tile + ToTileIndexDiff(afc->airport_depots[i])
02092       );
02093     }
02094 
02095     /* Go get the final noise level, that is base noise minus factor from distance to town center.
02096      * And as for construction, always remove it, even if the setting is not set, in order to avoid the
02097      * need of recalculation */
02098     Town *nearest = AirportGetNearestTown(afc, tile);
02099     nearest->noise_reached -= GetAirportNoiseLevelForTown(afc, nearest->xy, tile);
02100 
02101     st->rect.AfterRemoveRect(st, tile, w, h);
02102 
02103     st->airport_tile = INVALID_TILE;
02104     st->facilities &= ~FACIL_AIRPORT;
02105 
02106     SetWindowWidgetDirty(WC_STATION_VIEW, st->index, SVW_PLANES);
02107 
02108     if (_settings_game.economy.station_noise_level) {
02109       SetWindowDirty(WC_TOWN_VIEW, st->town->index);
02110     }
02111 
02112     st->UpdateVirtCoord();
02113     st->RecomputeIndustriesNear();
02114     DeleteStationIfEmpty(st);
02115   }
02116 
02117   return cost;
02118 }
02119 
02126 bool HasStationInUse(StationID station, CompanyID company)
02127 {
02128   const Vehicle *v;
02129   FOR_ALL_VEHICLES(v) {
02130     if (company == INVALID_COMPANY || v->owner == company) {
02131       const Order *order;
02132       FOR_VEHICLE_ORDERS(v, order) {
02133         if ((order->IsType(OT_GOTO_STATION) || order->IsType(OT_GOTO_WAYPOINT)) && order->GetDestination() == station) {
02134           return true;
02135         }
02136       }
02137     }
02138   }
02139   return false;
02140 }
02141 
02142 static const TileIndexDiffC _dock_tileoffs_chkaround[] = {
02143   {-1,  0},
02144   { 0,  0},
02145   { 0,  0},
02146   { 0, -1}
02147 };
02148 static const byte _dock_w_chk[4] = { 2, 1, 2, 1 };
02149 static const byte _dock_h_chk[4] = { 1, 2, 1, 2 };
02150 
02159 CommandCost CmdBuildDock(TileIndex tile, DoCommandFlag flags, uint32 p1, uint32 p2, const char *text)
02160 {
02161   StationID station_to_join = GB(p2, 16, 16);
02162   bool reuse = (station_to_join != NEW_STATION);
02163   if (!reuse) station_to_join = INVALID_STATION;
02164   bool distant_join = (station_to_join != INVALID_STATION);
02165 
02166   if (distant_join && (!_settings_game.station.distant_join_stations || !Station::IsValidID(station_to_join))) return CMD_ERROR;
02167 
02168   DiagDirection direction = GetInclinedSlopeDirection(GetTileSlope(tile, NULL));
02169   if (direction == INVALID_DIAGDIR) return_cmd_error(STR_ERROR_SITE_UNSUITABLE);
02170   direction = ReverseDiagDir(direction);
02171 
02172   /* Docks cannot be placed on rapids */
02173   if (IsWaterTile(tile)) return_cmd_error(STR_ERROR_SITE_UNSUITABLE);
02174 
02175   if (!CheckIfAuthorityAllowsNewStation(tile, flags)) return CMD_ERROR;
02176 
02177   if (MayHaveBridgeAbove(tile) && IsBridgeAbove(tile)) return_cmd_error(STR_ERROR_MUST_DEMOLISH_BRIDGE_FIRST);
02178 
02179   if (CmdFailed(DoCommand(tile, 0, 0, flags, CMD_LANDSCAPE_CLEAR))) return CMD_ERROR;
02180 
02181   TileIndex tile_cur = tile + TileOffsByDiagDir(direction);
02182 
02183   if (!IsTileType(tile_cur, MP_WATER) || GetTileSlope(tile_cur, NULL) != SLOPE_FLAT) {
02184     return_cmd_error(STR_ERROR_SITE_UNSUITABLE);
02185   }
02186 
02187   if (MayHaveBridgeAbove(tile_cur) && IsBridgeAbove(tile_cur)) return_cmd_error(STR_ERROR_MUST_DEMOLISH_BRIDGE_FIRST);
02188 
02189   /* Get the water class of the water tile before it is cleared.*/
02190   WaterClass wc = GetWaterClass(tile_cur);
02191 
02192   if (CmdFailed(DoCommand(tile_cur, 0, 0, flags, CMD_LANDSCAPE_CLEAR))) return CMD_ERROR;
02193 
02194   tile_cur += TileOffsByDiagDir(direction);
02195   if (!IsTileType(tile_cur, MP_WATER) || GetTileSlope(tile_cur, NULL) != SLOPE_FLAT) {
02196     return_cmd_error(STR_ERROR_SITE_UNSUITABLE);
02197   }
02198 
02199   /* middle */
02200   Station *st = NULL;
02201   CommandCost ret = FindJoiningStation(INVALID_STATION, station_to_join, HasBit(p1, 0),
02202       TileArea(tile + ToTileIndexDiff(_dock_tileoffs_chkaround[direction]),
02203           _dock_w_chk[direction], _dock_h_chk[direction]), &st);
02204   if (CmdFailed(ret)) return ret;
02205 
02206   /* Distant join */
02207   if (st == NULL && distant_join) st = Station::GetIfValid(station_to_join);
02208 
02209   /* Find a deleted station close to us */
02210   if (st == NULL && reuse) st = GetClosestDeletedStation(tile);
02211 
02212   if (st != NULL) {
02213     if (st->owner != _current_company) {
02214       return_cmd_error(STR_ERROR_TOO_CLOSE_TO_ANOTHER_STATION);
02215     }
02216 
02217     if (!st->rect.BeforeAddRect(
02218         tile + ToTileIndexDiff(_dock_tileoffs_chkaround[direction]),
02219         _dock_w_chk[direction], _dock_h_chk[direction], StationRect::ADD_TEST)) return CMD_ERROR;
02220 
02221     if (st->dock_tile != INVALID_TILE) return_cmd_error(STR_ERROR_TOO_CLOSE_TO_ANOTHER_DOCK);
02222   } else {
02223     /* allocate and initialize new station */
02224     if (!Station::CanAllocateItem()) return_cmd_error(STR_ERROR_TOO_MANY_STATIONS_LOADING);
02225 
02226     if (flags & DC_EXEC) {
02227       st = new Station(tile);
02228 
02229       st->town = ClosestTownFromTile(tile, UINT_MAX);
02230       st->string_id = GenerateStationName(st, tile, STATIONNAMING_DOCK);
02231 
02232       if (Company::IsValidID(_current_company)) {
02233         SetBit(st->town->have_ratings, _current_company);
02234       }
02235     }
02236   }
02237 
02238   if (flags & DC_EXEC) {
02239     st->dock_tile = tile;
02240     st->AddFacility(FACIL_DOCK, tile);
02241 
02242     st->rect.BeforeAddRect(
02243         tile + ToTileIndexDiff(_dock_tileoffs_chkaround[direction]),
02244         _dock_w_chk[direction], _dock_h_chk[direction], StationRect::ADD_TRY);
02245 
02246     MakeDock(tile, st->owner, st->index, direction, wc);
02247 
02248     st->UpdateVirtCoord();
02249     UpdateStationAcceptance(st, false);
02250     st->RecomputeIndustriesNear();
02251     InvalidateWindowData(WC_SELECT_STATION, 0, 0);
02252     InvalidateWindowData(WC_STATION_LIST, st->owner, 0);
02253     SetWindowWidgetDirty(WC_STATION_VIEW, st->index, SVW_SHIPS);
02254   }
02255 
02256   return CommandCost(EXPENSES_CONSTRUCTION, _price[PR_BUILD_STATION_DOCK]);
02257 }
02258 
02265 static CommandCost RemoveDock(TileIndex tile, DoCommandFlag flags)
02266 {
02267   Station *st = Station::GetByTile(tile);
02268   if (!CheckOwnership(st->owner)) return CMD_ERROR;
02269 
02270   TileIndex tile1 = st->dock_tile;
02271   TileIndex tile2 = tile1 + TileOffsByDiagDir(GetDockDirection(tile1));
02272 
02273   if (!EnsureNoVehicleOnGround(tile1)) return CMD_ERROR;
02274   if (!EnsureNoVehicleOnGround(tile2)) return CMD_ERROR;
02275 
02276   if (flags & DC_EXEC) {
02277     DoClearSquare(tile1);
02278     MakeWaterKeepingClass(tile2, st->owner);
02279 
02280     st->rect.AfterRemoveTile(st, tile1);
02281     st->rect.AfterRemoveTile(st, tile2);
02282 
02283     MarkTileDirtyByTile(tile2);
02284 
02285     st->dock_tile = INVALID_TILE;
02286     st->facilities &= ~FACIL_DOCK;
02287 
02288     SetWindowWidgetDirty(WC_STATION_VIEW, st->index, SVW_SHIPS);
02289     st->UpdateVirtCoord();
02290     st->RecomputeIndustriesNear();
02291     DeleteStationIfEmpty(st);
02292   }
02293 
02294   return CommandCost(EXPENSES_CONSTRUCTION, _price[PR_CLEAR_STATION_DOCK]);
02295 }
02296 
02297 #include "table/station_land.h"
02298 
02299 const DrawTileSprites *GetStationTileLayout(StationType st, byte gfx)
02300 {
02301   return &_station_display_datas[st][gfx];
02302 }
02303 
02304 static void DrawTile_Station(TileInfo *ti)
02305 {
02306   const DrawTileSprites *t = NULL;
02307   RoadTypes roadtypes;
02308   int32 total_offset;
02309   int32 custom_ground_offset;
02310 
02311   if (HasStationRail(ti->tile)) {
02312     const RailtypeInfo *rti = GetRailTypeInfo(GetRailType(ti->tile));
02313     roadtypes = ROADTYPES_NONE;
02314     total_offset = rti->total_offset;
02315     custom_ground_offset = rti->custom_ground_offset;
02316   } else {
02317     roadtypes = IsRoadStop(ti->tile) ? GetRoadTypes(ti->tile) : ROADTYPES_NONE;
02318     total_offset = 0;
02319     custom_ground_offset = 0;
02320   }
02321   uint32 relocation = 0;
02322   const BaseStation *st = NULL;
02323   const StationSpec *statspec = NULL;
02324   Owner owner = GetTileOwner(ti->tile);
02325 
02326   SpriteID palette;
02327   if (Company::IsValidID(owner)) {
02328     palette = COMPANY_SPRITE_COLOUR(owner);
02329   } else {
02330     /* Some stations are not owner by a company, namely oil rigs */
02331     palette = PALETTE_TO_GREY;
02332   }
02333 
02334   if (IsCustomStationSpecIndex(ti->tile)) {
02335     /* look for customization */
02336     st = BaseStation::GetByTile(ti->tile);
02337     statspec = st->speclist[GetCustomStationSpecIndex(ti->tile)].spec;
02338 
02339     if (statspec != NULL) {
02340       uint tile = GetStationGfx(ti->tile);
02341 
02342       relocation = GetCustomStationRelocation(statspec, st, ti->tile);
02343 
02344       if (HasBit(statspec->callback_mask, CBM_STATION_SPRITE_LAYOUT)) {
02345         uint16 callback = GetStationCallback(CBID_STATION_SPRITE_LAYOUT, 0, 0, statspec, st, ti->tile);
02346         if (callback != CALLBACK_FAILED) tile = (callback & ~1) + GetRailStationAxis(ti->tile);
02347       }
02348 
02349       /* Ensure the chosen tile layout is valid for this custom station */
02350       if (statspec->renderdata != NULL) {
02351         t = &statspec->renderdata[tile < statspec->tiles ? tile : (uint)GetRailStationAxis(ti->tile)];
02352       }
02353     }
02354   }
02355 
02356   if (t == NULL || t->seq == NULL) t = &_station_display_datas[GetStationType(ti->tile)][GetStationGfx(ti->tile)];
02357 
02358   /* don't show foundation for docks */
02359   if (ti->tileh != SLOPE_FLAT && !IsDock(ti->tile)) {
02360     if (statspec != NULL && HasBit(statspec->flags, SSF_CUSTOM_FOUNDATIONS)) {
02361       /* Station has custom foundations. */
02362       SpriteID image = GetCustomStationFoundationRelocation(statspec, st, ti->tile);
02363 
02364       if (HasBit(statspec->flags, SSF_EXTENDED_FOUNDATIONS)) {
02365         /* Station provides extended foundations. */
02366 
02367         static const uint8 foundation_parts[] = {
02368           0, 0, 0, 0, // Invalid,  Invalid,   Invalid,   SLOPE_SW
02369           0, 1, 2, 3, // Invalid,  SLOPE_EW,  SLOPE_SE,  SLOPE_WSE
02370           0, 4, 5, 6, // Invalid,  SLOPE_NW,  SLOPE_NS,  SLOPE_NWS
02371           7, 8, 9     // SLOPE_NE, SLOPE_ENW, SLOPE_SEN
02372         };
02373 
02374         AddSortableSpriteToDraw(image + foundation_parts[ti->tileh], PAL_NONE, ti->x, ti->y, 16, 16, 7, ti->z);
02375       } else {
02376         /* Draw simple foundations, built up from 8 possible foundation sprites. */
02377 
02378         /* Each set bit represents one of the eight composite sprites to be drawn.
02379          * 'Invalid' entries will not drawn but are included for completeness. */
02380         static const uint8 composite_foundation_parts[] = {
02381           /* Invalid  (00000000), Invalid   (11010001), Invalid   (11100100), SLOPE_SW  (11100000) */
02382              0x00,                0xD1,                 0xE4,                 0xE0,
02383           /* Invalid  (11001010), SLOPE_EW  (11001001), SLOPE_SE  (11000100), SLOPE_WSE (11000000) */
02384              0xCA,                0xC9,                 0xC4,                 0xC0,
02385           /* Invalid  (11010010), SLOPE_NW  (10010001), SLOPE_NS  (11100100), SLOPE_NWS (10100000) */
02386              0xD2,                0x91,                 0xE4,                 0xA0,
02387           /* SLOPE_NE (01001010), SLOPE_ENW (00001001), SLOPE_SEN (01000100) */
02388              0x4A,                0x09,                 0x44
02389         };
02390 
02391         uint8 parts = composite_foundation_parts[ti->tileh];
02392 
02393         /* If foundations continue beyond the tile's upper sides then
02394          * mask out the last two pieces. */
02395         uint z;
02396         Slope slope = GetFoundationSlope(ti->tile, &z);
02397         if (!HasFoundationNW(ti->tile, slope, z)) ClrBit(parts, 6);
02398         if (!HasFoundationNE(ti->tile, slope, z)) ClrBit(parts, 7);
02399 
02400         for (int i = 0; i < 8; i++) {
02401           if (HasBit(parts, i)) {
02402             AddSortableSpriteToDraw(image + i, PAL_NONE, ti->x, ti->y, 16, 16, 7, ti->z);
02403           }
02404         }
02405       }
02406 
02407       OffsetGroundSprite(31, 1);
02408       ti->z += ApplyFoundationToSlope(FOUNDATION_LEVELED, &ti->tileh);
02409     } else {
02410       DrawFoundation(ti, FOUNDATION_LEVELED);
02411     }
02412   }
02413 
02414   if (IsBuoy(ti->tile) || IsDock(ti->tile) || (IsOilRig(ti->tile) && GetWaterClass(ti->tile) != WATER_CLASS_INVALID)) {
02415     if (ti->tileh == SLOPE_FLAT) {
02416       DrawWaterClassGround(ti);
02417     } else {
02418       assert(IsDock(ti->tile));
02419       TileIndex water_tile = ti->tile + TileOffsByDiagDir(GetDockDirection(ti->tile));
02420       WaterClass wc = GetWaterClass(water_tile);
02421       if (wc == WATER_CLASS_SEA) {
02422         DrawShoreTile(ti->tileh);
02423       } else {
02424         DrawClearLandTile(ti, 3);
02425       }
02426     }
02427   } else {
02428     SpriteID image = t->ground.sprite;
02429     SpriteID pal   = t->ground.pal;
02430     if (HasBit(image, SPRITE_MODIFIER_USE_OFFSET)) {
02431       image += GetCustomStationGroundRelocation(statspec, st, ti->tile);
02432       image += custom_ground_offset;
02433     } else {
02434       image += total_offset;
02435     }
02436     DrawGroundSprite(image, GroundSpritePaletteTransform(image, pal, palette));
02437 
02438     /* PBS debugging, draw reserved tracks darker */
02439     if (_game_mode != GM_MENU && _settings_client.gui.show_track_reservation && HasStationRail(ti->tile) && HasStationReservation(ti->tile)) {
02440       const RailtypeInfo *rti = GetRailTypeInfo(GetRailType(ti->tile));
02441       DrawGroundSprite(GetRailStationAxis(ti->tile) == AXIS_X ? rti->base_sprites.single_x : rti->base_sprites.single_y, PALETTE_CRASH);
02442     }
02443   }
02444 
02445   if (HasStationRail(ti->tile) && HasCatenaryDrawn(GetRailType(ti->tile)) && IsStationTileElectrifiable(ti->tile)) DrawCatenary(ti);
02446 
02447   if (HasBit(roadtypes, ROADTYPE_TRAM)) {
02448     Axis axis = GetRoadStopDir(ti->tile) == DIAGDIR_NE ? AXIS_X : AXIS_Y;
02449     DrawGroundSprite((HasBit(roadtypes, ROADTYPE_ROAD) ? SPR_TRAMWAY_OVERLAY : SPR_TRAMWAY_TRAM) + (axis ^ 1), PAL_NONE);
02450     DrawTramCatenary(ti, axis == AXIS_X ? ROAD_X : ROAD_Y);
02451   }
02452 
02453   if (IsRailWaypoint(ti->tile)) {
02454     /* Don't offset the waypoint graphics; they're always the same. */
02455     total_offset = 0;
02456   }
02457 
02458   const DrawTileSeqStruct *dtss;
02459   foreach_draw_tile_seq(dtss, t->seq) {
02460     SpriteID image = dtss->image.sprite;
02461 
02462     /* Stop drawing sprite sequence once we meet a sprite that doesn't have to be opaque */
02463     if (IsInvisibilitySet(TO_BUILDINGS) && !HasBit(image, SPRITE_MODIFIER_OPAQUE)) return;
02464 
02465     if (relocation == 0 || HasBit(image, SPRITE_MODIFIER_USE_OFFSET)) {
02466       image += total_offset;
02467     } else {
02468       image += relocation;
02469     }
02470 
02471     SpriteID pal = SpriteLayoutPaletteTransform(image, dtss->image.pal, palette);
02472 
02473     if ((byte)dtss->delta_z != 0x80) {
02474       AddSortableSpriteToDraw(
02475         image, pal,
02476         ti->x + dtss->delta_x, ti->y + dtss->delta_y,
02477         dtss->size_x, dtss->size_y,
02478         dtss->size_z, ti->z + dtss->delta_z,
02479         !HasBit(image, SPRITE_MODIFIER_OPAQUE) && IsTransparencySet(TO_BUILDINGS)
02480       );
02481     } else {
02482       /* For stations and original spritelayouts delta_x and delta_y are signed */
02483       AddChildSpriteScreen(image, pal, dtss->delta_x, dtss->delta_y, !HasBit(image, SPRITE_MODIFIER_OPAQUE) && IsTransparencySet(TO_BUILDINGS));
02484     }
02485   }
02486 }
02487 
02488 void StationPickerDrawSprite(int x, int y, StationType st, RailType railtype, RoadType roadtype, int image)
02489 {
02490   int32 total_offset = 0;
02491   SpriteID pal = COMPANY_SPRITE_COLOUR(_local_company);
02492   const DrawTileSprites *t = &_station_display_datas[st][image];
02493 
02494   if (railtype != INVALID_RAILTYPE) {
02495     const RailtypeInfo *rti = GetRailTypeInfo(railtype);
02496     total_offset = rti->total_offset;
02497   }
02498 
02499   SpriteID img = t->ground.sprite;
02500   DrawSprite(img + total_offset, HasBit(img, PALETTE_MODIFIER_COLOUR) ? pal : PAL_NONE, x, y);
02501 
02502   if (roadtype == ROADTYPE_TRAM) {
02503     DrawSprite(SPR_TRAMWAY_TRAM + (t->ground.sprite == SPR_ROAD_PAVED_STRAIGHT_X ? 1 : 0), PAL_NONE, x, y);
02504   }
02505 
02506   const DrawTileSeqStruct *dtss;
02507   foreach_draw_tile_seq(dtss, t->seq) {
02508     Point pt = RemapCoords(dtss->delta_x, dtss->delta_y, dtss->delta_z);
02509     DrawSprite(dtss->image.sprite + total_offset, pal, x + pt.x, y + pt.y);
02510   }
02511 }
02512 
02513 static uint GetSlopeZ_Station(TileIndex tile, uint x, uint y)
02514 {
02515   return GetTileMaxZ(tile);
02516 }
02517 
02518 static Foundation GetFoundation_Station(TileIndex tile, Slope tileh)
02519 {
02520   return FlatteningFoundation(tileh);
02521 }
02522 
02523 static void GetTileDesc_Station(TileIndex tile, TileDesc *td)
02524 {
02525   td->owner[0] = GetTileOwner(tile);
02526   if (IsDriveThroughStopTile(tile)) {
02527     Owner road_owner = INVALID_OWNER;
02528     Owner tram_owner = INVALID_OWNER;
02529     RoadTypes rts = GetRoadTypes(tile);
02530     if (HasBit(rts, ROADTYPE_ROAD)) road_owner = GetRoadOwner(tile, ROADTYPE_ROAD);
02531     if (HasBit(rts, ROADTYPE_TRAM)) tram_owner = GetRoadOwner(tile, ROADTYPE_TRAM);
02532 
02533     /* Is there a mix of owners? */
02534     if ((tram_owner != INVALID_OWNER && tram_owner != td->owner[0]) ||
02535         (road_owner != INVALID_OWNER && road_owner != td->owner[0])) {
02536       uint i = 1;
02537       if (road_owner != INVALID_OWNER) {
02538         td->owner_type[i] = STR_LAND_AREA_INFORMATION_ROAD_OWNER;
02539         td->owner[i] = road_owner;
02540         i++;
02541       }
02542       if (tram_owner != INVALID_OWNER) {
02543         td->owner_type[i] = STR_LAND_AREA_INFORMATION_TRAM_OWNER;
02544         td->owner[i] = tram_owner;
02545       }
02546     }
02547   }
02548   td->build_date = BaseStation::GetByTile(tile)->build_date;
02549 
02550   const StationSpec *spec = GetStationSpec(tile);
02551 
02552   if (spec != NULL) {
02553     td->station_class = GetStationClassName(spec->sclass);
02554     td->station_name = spec->name;
02555 
02556     if (spec->grffile != NULL) {
02557       const GRFConfig *gc = GetGRFConfig(spec->grffile->grfid);
02558       td->grf = gc->name;
02559     }
02560   }
02561 
02562   StringID str;
02563   switch (GetStationType(tile)) {
02564     default: NOT_REACHED();
02565     case STATION_RAIL:     str = STR_LAI_STATION_DESCRIPTION_RAILROAD_STATION; break;
02566     case STATION_AIRPORT:
02567       str = (IsHangar(tile) ? STR_LAI_STATION_DESCRIPTION_AIRCRAFT_HANGAR : STR_LAI_STATION_DESCRIPTION_AIRPORT);
02568       break;
02569     case STATION_TRUCK:    str = STR_LAI_STATION_DESCRIPTION_TRUCK_LOADING_AREA; break;
02570     case STATION_BUS:      str = STR_LAI_STATION_DESCRIPTION_BUS_STATION; break;
02571     case STATION_OILRIG:   str = STR_INDUSTRY_NAME_OIL_RIG; break;
02572     case STATION_DOCK:     str = STR_LAI_STATION_DESCRIPTION_SHIP_DOCK; break;
02573     case STATION_BUOY:     str = STR_LAI_STATION_DESCRIPTION_BUOY; break;
02574     case STATION_WAYPOINT: str = STR_LAI_STATION_DESCRIPTION_WAYPOINT; break;
02575   }
02576   td->str = str;
02577 }
02578 
02579 
02580 static TrackStatus GetTileTrackStatus_Station(TileIndex tile, TransportType mode, uint sub_mode, DiagDirection side)
02581 {
02582   TrackBits trackbits = TRACK_BIT_NONE;
02583 
02584   switch (mode) {
02585     case TRANSPORT_RAIL:
02586       if (HasStationRail(tile) && !IsStationTileBlocked(tile)) {
02587         trackbits = TrackToTrackBits(GetRailStationTrack(tile));
02588       }
02589       break;
02590 
02591     case TRANSPORT_WATER:
02592       /* buoy is coded as a station, it is always on open water */
02593       if (IsBuoy(tile)) {
02594         trackbits = TRACK_BIT_ALL;
02595         /* remove tracks that connect NE map edge */
02596         if (TileX(tile) == 0) trackbits &= ~(TRACK_BIT_X | TRACK_BIT_UPPER | TRACK_BIT_RIGHT);
02597         /* remove tracks that connect NW map edge */
02598         if (TileY(tile) == 0) trackbits &= ~(TRACK_BIT_Y | TRACK_BIT_LEFT | TRACK_BIT_UPPER);
02599       }
02600       break;
02601 
02602     case TRANSPORT_ROAD:
02603       if ((GetRoadTypes(tile) & sub_mode) != 0 && IsRoadStop(tile)) {
02604         DiagDirection dir = GetRoadStopDir(tile);
02605         Axis axis = DiagDirToAxis(dir);
02606 
02607         if (side != INVALID_DIAGDIR) {
02608           if (axis != DiagDirToAxis(side) || (IsStandardRoadStopTile(tile) && dir != side)) break;
02609         }
02610 
02611         trackbits = AxisToTrackBits(axis);
02612       }
02613       break;
02614 
02615     default:
02616       break;
02617   }
02618 
02619   return CombineTrackStatus(TrackBitsToTrackdirBits(trackbits), TRACKDIR_BIT_NONE);
02620 }
02621 
02622 
02623 static void TileLoop_Station(TileIndex tile)
02624 {
02625   /* FIXME -- GetTileTrackStatus_Station -> animated stationtiles
02626    * hardcoded.....not good */
02627   switch (GetStationType(tile)) {
02628     case STATION_AIRPORT:
02629       switch (GetStationGfx(tile)) {
02630         case GFX_RADAR_LARGE_FIRST:
02631         case GFX_WINDSACK_FIRST : // for small airport
02632         case GFX_RADAR_INTERNATIONAL_FIRST:
02633         case GFX_RADAR_METROPOLITAN_FIRST:
02634         case GFX_RADAR_DISTRICTWE_FIRST: // radar district W-E airport
02635         case GFX_WINDSACK_INTERCON_FIRST : // for intercontinental airport
02636           AddAnimatedTile(tile);
02637           break;
02638       }
02639       break;
02640 
02641     case STATION_DOCK:
02642       if (GetTileSlope(tile, NULL) != SLOPE_FLAT) break; // only handle water part
02643     /* FALL THROUGH */
02644     case STATION_OILRIG: //(station part)
02645     case STATION_BUOY:
02646       TileLoop_Water(tile);
02647       break;
02648 
02649     default: break;
02650   }
02651 }
02652 
02653 
02654 static void AnimateTile_Station(TileIndex tile)
02655 {
02656   struct AnimData {
02657     StationGfx from; // first sprite
02658     StationGfx to;   // last sprite
02659     byte delay;
02660   };
02661 
02662   static const AnimData data[] = {
02663     { GFX_RADAR_LARGE_FIRST,         GFX_RADAR_LARGE_LAST,         3 },
02664     { GFX_WINDSACK_FIRST,            GFX_WINDSACK_LAST,            1 },
02665     { GFX_RADAR_INTERNATIONAL_FIRST, GFX_RADAR_INTERNATIONAL_LAST, 3 },
02666     { GFX_RADAR_METROPOLITAN_FIRST,  GFX_RADAR_METROPOLITAN_LAST,  3 },
02667     { GFX_RADAR_DISTRICTWE_FIRST,    GFX_RADAR_DISTRICTWE_LAST,    3 },
02668     { GFX_WINDSACK_INTERCON_FIRST,   GFX_WINDSACK_INTERCON_LAST,   1 }
02669   };
02670 
02671   if (HasStationRail(tile)) {
02672     AnimateStationTile(tile);
02673     return;
02674   }
02675 
02676   StationGfx gfx = GetStationGfx(tile);
02677 
02678   for (const AnimData *i = data; i != endof(data); i++) {
02679     if (i->from <= gfx && gfx <= i->to) {
02680       if ((_tick_counter & i->delay) == 0) {
02681         SetStationGfx(tile, gfx < i->to ? gfx + 1 : i->from);
02682         MarkTileDirtyByTile(tile);
02683       }
02684       break;
02685     }
02686   }
02687 }
02688 
02689 
02690 static bool ClickTile_Station(TileIndex tile)
02691 {
02692   const BaseStation *st = BaseStation::GetByTile(tile);
02693 
02694   if (st->facilities & FACIL_WAYPOINT) {
02695     ShowWaypointWindow(Waypoint::From(st));
02696   } else if (IsHangar(tile)) {
02697     ShowDepotWindow(tile, VEH_AIRCRAFT);
02698   } else {
02699     ShowStationViewWindow(st->index);
02700   }
02701   return true;
02702 }
02703 
02704 static VehicleEnterTileStatus VehicleEnter_Station(Vehicle *v, TileIndex tile, int x, int y)
02705 {
02706   if (v->type == VEH_TRAIN) {
02707     StationID station_id = GetStationIndex(tile);
02708     if (!v->current_order.ShouldStopAtStation(v, station_id)) return VETSB_CONTINUE;
02709     if (!IsRailStation(tile) || !Train::From(v)->IsFrontEngine()) return VETSB_CONTINUE;
02710 
02711     int station_ahead;
02712     int station_length;
02713     int stop = GetTrainStopLocation(station_id, tile, Train::From(v), &station_ahead, &station_length);
02714 
02715     /* Stop whenever that amount of station ahead + the distance from the
02716      * begin of the platform to the stop location is longer than the length
02717      * of the platform. Station ahead 'includes' the current tile where the
02718      * vehicle is on, so we need to substract that. */
02719     if (!IsInsideBS(stop + station_ahead, station_length, TILE_SIZE)) return VETSB_CONTINUE;
02720 
02721     DiagDirection dir = DirToDiagDir(v->direction);
02722 
02723     x &= 0xF;
02724     y &= 0xF;
02725 
02726     if (DiagDirToAxis(dir) != AXIS_X) Swap(x, y);
02727     if (y == TILE_SIZE / 2) {
02728       if (dir != DIAGDIR_SE && dir != DIAGDIR_SW) x = TILE_SIZE - 1 - x;
02729       stop &= TILE_SIZE - 1;
02730 
02731       if (x == stop) return VETSB_ENTERED_STATION | (VehicleEnterTileStatus)(station_id << VETS_STATION_ID_OFFSET); // enter station
02732       if (x < stop) {
02733         uint16 spd;
02734 
02735         v->vehstatus |= VS_TRAIN_SLOWING;
02736         spd = max(0, (stop - x) * 20 - 15);
02737         if (spd < v->cur_speed) v->cur_speed = spd;
02738       }
02739     }
02740   } else if (v->type == VEH_ROAD) {
02741     RoadVehicle *rv = RoadVehicle::From(v);
02742     if (rv->state < RVSB_IN_ROAD_STOP && !IsReversingRoadTrackdir((Trackdir)rv->state) && rv->frame == 0) {
02743       if (IsRoadStop(tile) && rv->IsRoadVehFront()) {
02744         /* Attempt to allocate a parking bay in a road stop */
02745         return RoadStop::GetByTile(tile, GetRoadStopType(tile))->Enter(rv) ? VETSB_CONTINUE : VETSB_CANNOT_ENTER;
02746       }
02747     }
02748   }
02749 
02750   return VETSB_CONTINUE;
02751 }
02752 
02759 static bool StationHandleBigTick(BaseStation *st)
02760 {
02761   if (!st->IsInUse() && ++st->delete_ctr >= 8) {
02762     delete st;
02763     return false;
02764   }
02765 
02766   if ((st->facilities & FACIL_WAYPOINT) == 0) UpdateStationAcceptance(Station::From(st), true);
02767 
02768   return true;
02769 }
02770 
02771 static inline void byte_inc_sat(byte *p)
02772 {
02773   byte b = *p + 1;
02774   if (b != 0) *p = b;
02775 }
02776 
02777 static void UpdateStationRating(Station *st)
02778 {
02779   bool waiting_changed = false;
02780 
02781   byte_inc_sat(&st->time_since_load);
02782   byte_inc_sat(&st->time_since_unload);
02783 
02784   const CargoSpec *cs;
02785   FOR_ALL_CARGOSPECS(cs) {
02786     GoodsEntry *ge = &st->goods[cs->Index()];
02787     /* Slowly increase the rating back to his original level in the case we
02788      *  didn't deliver cargo yet to this station. This happens when a bribe
02789      *  failed while you didn't moved that cargo yet to a station. */
02790     if (!HasBit(ge->acceptance_pickup, GoodsEntry::PICKUP) && ge->rating < INITIAL_STATION_RATING) {
02791       ge->rating++;
02792     }
02793 
02794     /* Only change the rating if we are moving this cargo */
02795     if (HasBit(ge->acceptance_pickup, GoodsEntry::PICKUP)) {
02796       byte_inc_sat(&ge->days_since_pickup);
02797 
02798       bool skip = false;
02799       int rating = 0;
02800       uint waiting = ge->cargo.Count();
02801 
02802       if (HasBit(cs->callback_mask, CBM_CARGO_STATION_RATING_CALC)) {
02803         /* Perform custom station rating. If it succeeds the speed, days in transit and
02804          * waiting cargo ratings must not be executed. */
02805 
02806         /* NewGRFs expect last speed to be 0xFF when no vehicle has arrived yet. */
02807         uint last_speed = ge->last_speed;
02808         if (last_speed == 0) last_speed = 0xFF;
02809 
02810         uint32 var18 = min(ge->days_since_pickup, 0xFF) | (min(waiting, 0xFFFF) << 8) | (min(last_speed, 0xFF) << 24);
02811         /* Convert to the 'old' vehicle types */
02812         uint32 var10 = (st->last_vehicle_type == VEH_INVALID) ? 0x0 : (st->last_vehicle_type + 0x10);
02813         uint16 callback = GetCargoCallback(CBID_CARGO_STATION_RATING_CALC, var10, var18, cs);
02814         if (callback != CALLBACK_FAILED) {
02815           skip = true;
02816           rating = GB(callback, 0, 14);
02817 
02818           /* Simulate a 15 bit signed value */
02819           if (HasBit(callback, 14)) rating -= 0x4000;
02820         }
02821       }
02822 
02823       if (!skip) {
02824         int b = ge->last_speed - 85;
02825         if (b >= 0) rating += b >> 2;
02826 
02827         byte days = ge->days_since_pickup;
02828         if (st->last_vehicle_type == VEH_SHIP) days >>= 2;
02829         (days > 21) ||
02830         (rating += 25, days > 12) ||
02831         (rating += 25, days > 6) ||
02832         (rating += 45, days > 3) ||
02833         (rating += 35, true);
02834 
02835         (rating -= 90, waiting > 1500) ||
02836         (rating += 55, waiting > 1000) ||
02837         (rating += 35, waiting > 600) ||
02838         (rating += 10, waiting > 300) ||
02839         (rating += 20, waiting > 100) ||
02840         (rating += 10, true);
02841       }
02842 
02843       if (Company::IsValidID(st->owner) && HasBit(st->town->statues, st->owner)) rating += 26;
02844 
02845       byte age = ge->last_age;
02846       (age >= 3) ||
02847       (rating += 10, age >= 2) ||
02848       (rating += 10, age >= 1) ||
02849       (rating += 13, true);
02850 
02851       {
02852         int or_ = ge->rating; // old rating
02853 
02854         /* only modify rating in steps of -2, -1, 0, 1 or 2 */
02855         ge->rating = rating = or_ + Clamp(Clamp(rating, 0, 255) - or_, -2, 2);
02856 
02857         /* if rating is <= 64 and more than 200 items waiting,
02858          * remove some random amount of goods from the station */
02859         if (rating <= 64 && waiting >= 200) {
02860           int dec = Random() & 0x1F;
02861           if (waiting < 400) dec &= 7;
02862           waiting -= dec + 1;
02863           waiting_changed = true;
02864         }
02865 
02866         /* if rating is <= 127 and there are any items waiting, maybe remove some goods. */
02867         if (rating <= 127 && waiting != 0) {
02868           uint32 r = Random();
02869           if (rating <= (int)GB(r, 0, 7)) {
02870             /* Need to have int, otherwise it will just overflow etc. */
02871             waiting = max((int)waiting - (int)GB(r, 8, 2) - 1, 0);
02872             waiting_changed = true;
02873           }
02874         }
02875 
02876         /* At some point we really must cap the cargo. Previously this
02877          * was a strict 4095, but now we'll have a less strict, but
02878          * increasingly agressive truncation of the amount of cargo. */
02879         static const uint WAITING_CARGO_THRESHOLD  = 1 << 12;
02880         static const uint WAITING_CARGO_CUT_FACTOR = 1 <<  6;
02881         static const uint MAX_WAITING_CARGO        = 1 << 15;
02882 
02883         if (waiting > WAITING_CARGO_THRESHOLD) {
02884           uint difference = waiting - WAITING_CARGO_THRESHOLD;
02885           waiting -= (difference / WAITING_CARGO_CUT_FACTOR);
02886 
02887           waiting = min(waiting, MAX_WAITING_CARGO);
02888           waiting_changed = true;
02889         }
02890 
02891         if (waiting_changed) ge->cargo.Truncate(waiting);
02892       }
02893     }
02894   }
02895 
02896   StationID index = st->index;
02897   if (waiting_changed) {
02898     SetWindowDirty(WC_STATION_VIEW, index); // update whole window
02899   } else {
02900     SetWindowWidgetDirty(WC_STATION_VIEW, index, SVW_RATINGLIST); // update only ratings list
02901   }
02902 }
02903 
02904 /* called for every station each tick */
02905 static void StationHandleSmallTick(BaseStation *st)
02906 {
02907   if ((st->facilities & FACIL_WAYPOINT) != 0 || !st->IsInUse()) return;
02908 
02909   byte b = st->delete_ctr + 1;
02910   if (b >= 185) b = 0;
02911   st->delete_ctr = b;
02912 
02913   if (b == 0) UpdateStationRating(Station::From(st));
02914 }
02915 
02916 void OnTick_Station()
02917 {
02918   if (_game_mode == GM_EDITOR) return;
02919 
02920   BaseStation *st;
02921   FOR_ALL_BASE_STATIONS(st) {
02922     StationHandleSmallTick(st);
02923 
02924     /* Run 250 tick interval trigger for station animation.
02925      * Station index is included so that triggers are not all done
02926      * at the same time. */
02927     if ((_tick_counter + st->index) % 250 == 0) {
02928       /* Stop processing this station if it was deleted */
02929       if (!StationHandleBigTick(st)) continue;
02930       StationAnimationTrigger(st, st->xy, STAT_ANIM_250_TICKS);
02931     }
02932   }
02933 }
02934 
02935 void StationMonthlyLoop()
02936 {
02937   /* not used */
02938 }
02939 
02940 
02941 void ModifyStationRatingAround(TileIndex tile, Owner owner, int amount, uint radius)
02942 {
02943   Station *st;
02944 
02945   FOR_ALL_STATIONS(st) {
02946     if (st->owner == owner &&
02947         DistanceManhattan(tile, st->xy) <= radius) {
02948       for (CargoID i = 0; i < NUM_CARGO; i++) {
02949         GoodsEntry *ge = &st->goods[i];
02950 
02951         if (ge->acceptance_pickup != 0) {
02952           ge->rating = Clamp(ge->rating + amount, 0, 255);
02953         }
02954       }
02955     }
02956   }
02957 }
02958 
02959 static void UpdateStationWaiting(Station *st, CargoID type, uint amount, SourceType source_type, SourceID source_id)
02960 {
02961   st->goods[type].cargo.Append(new CargoPacket(st->index, st->xy, amount, source_type, source_id));
02962   SetBit(st->goods[type].acceptance_pickup, GoodsEntry::PICKUP);
02963 
02964   StationAnimationTrigger(st, st->xy, STAT_ANIM_NEW_CARGO, type);
02965 
02966   SetWindowDirty(WC_STATION_VIEW, st->index);
02967   st->MarkTilesDirty(true);
02968 }
02969 
02970 static bool IsUniqueStationName(const char *name)
02971 {
02972   const Station *st;
02973 
02974   FOR_ALL_STATIONS(st) {
02975     if (st->name != NULL && strcmp(st->name, name) == 0) return false;
02976   }
02977 
02978   return true;
02979 }
02980 
02989 CommandCost CmdRenameStation(TileIndex tile, DoCommandFlag flags, uint32 p1, uint32 p2, const char *text)
02990 {
02991   Station *st = Station::GetIfValid(p1);
02992   if (st == NULL || !CheckOwnership(st->owner)) return CMD_ERROR;
02993 
02994   bool reset = StrEmpty(text);
02995 
02996   if (!reset) {
02997     if (strlen(text) >= MAX_LENGTH_STATION_NAME_BYTES) return CMD_ERROR;
02998     if (!IsUniqueStationName(text)) return_cmd_error(STR_ERROR_NAME_MUST_BE_UNIQUE);
02999   }
03000 
03001   if (flags & DC_EXEC) {
03002     free(st->name);
03003     st->name = reset ? NULL : strdup(text);
03004 
03005     st->UpdateVirtCoord();
03006     InvalidateWindowData(WC_STATION_LIST, st->owner, 1);
03007   }
03008 
03009   return CommandCost();
03010 }
03011 
03018 void FindStationsAroundTiles(const TileArea &location, StationList *stations)
03019 {
03020   /* area to search = producer plus station catchment radius */
03021   int max_rad = (_settings_game.station.modified_catchment ? MAX_CATCHMENT : CA_UNMODIFIED);
03022 
03023   for (int dy = -max_rad; dy < location.h + max_rad; dy++) {
03024     for (int dx = -max_rad; dx < location.w + max_rad; dx++) {
03025       TileIndex cur_tile = TileAddWrap(location.tile, dx, dy);
03026       if (cur_tile == INVALID_TILE || !IsTileType(cur_tile, MP_STATION)) continue;
03027 
03028       Station *st = Station::GetByTile(cur_tile);
03029       if (st == NULL) continue;
03030 
03031       if (_settings_game.station.modified_catchment) {
03032         int rad = st->GetCatchmentRadius();
03033         if (dx < -rad || dx >= rad + location.w || dy < -rad || dy >= rad + location.h) continue;
03034       }
03035 
03036       /* Insert the station in the set. This will fail if it has
03037        * already been added.
03038        */
03039       stations->Include(st);
03040     }
03041   }
03042 }
03043 
03048 const StationList *StationFinder::GetStations()
03049 {
03050   if (this->tile != INVALID_TILE) {
03051     FindStationsAroundTiles(*this, &this->stations);
03052     this->tile = INVALID_TILE;
03053   }
03054   return &this->stations;
03055 }
03056 
03057 uint MoveGoodsToStation(CargoID type, uint amount, SourceType source_type, SourceID source_id, const StationList *all_stations)
03058 {
03059   /* Return if nothing to do. Also the rounding below fails for 0. */
03060   if (amount == 0) return 0;
03061 
03062   Station *st1 = NULL;   // Station with best rating
03063   Station *st2 = NULL;   // Second best station
03064   uint best_rating1 = 0; // rating of st1
03065   uint best_rating2 = 0; // rating of st2
03066 
03067   for (Station * const *st_iter = all_stations->Begin(); st_iter != all_stations->End(); ++st_iter) {
03068     Station *st = *st_iter;
03069 
03070     /* Is the station reserved exclusively for somebody else? */
03071     if (st->town->exclusive_counter > 0 && st->town->exclusivity != st->owner) continue;
03072 
03073     if (st->goods[type].rating == 0) continue; // Lowest possible rating, better not to give cargo anymore
03074 
03075     if (_settings_game.order.selectgoods && st->goods[type].last_speed == 0) continue; // Selectively servicing stations, and not this one
03076 
03077     if (IsCargoInClass(type, CC_PASSENGERS)) {
03078       if (st->facilities == FACIL_TRUCK_STOP) continue; // passengers are never served by just a truck stop
03079     } else {
03080       if (st->facilities == FACIL_BUS_STOP) continue; // non-passengers are never served by just a bus stop
03081     }
03082 
03083     /* This station can be used, add it to st1/st2 */
03084     if (st1 == NULL || st->goods[type].rating >= best_rating1) {
03085       st2 = st1; best_rating2 = best_rating1; st1 = st; best_rating1 = st->goods[type].rating;
03086     } else if (st2 == NULL || st->goods[type].rating >= best_rating2) {
03087       st2 = st; best_rating2 = st->goods[type].rating;
03088     }
03089   }
03090 
03091   /* no stations around at all? */
03092   if (st1 == NULL) return 0;
03093 
03094   if (st2 == NULL) {
03095     /* only one station around */
03096     uint moved = amount * best_rating1 / 256 + 1;
03097     UpdateStationWaiting(st1, type, moved, source_type, source_id);
03098     return moved;
03099   }
03100 
03101   /* several stations around, the best two (highest rating) are in st1 and st2 */
03102   assert(st1 != NULL);
03103   assert(st2 != NULL);
03104   assert(best_rating1 != 0 || best_rating2 != 0);
03105 
03106   /* the 2nd highest one gets a penalty */
03107   best_rating2 >>= 1;
03108 
03109   /* amount given to station 1 */
03110   uint t = (best_rating1 * (amount + 1)) / (best_rating1 + best_rating2);
03111 
03112   uint moved = 0;
03113   if (t != 0) {
03114     moved = t * best_rating1 / 256 + 1;
03115     amount -= t;
03116     UpdateStationWaiting(st1, type, moved, source_type, source_id);
03117   }
03118 
03119   if (amount != 0) {
03120     amount = amount * best_rating2 / 256 + 1;
03121     moved += amount;
03122     UpdateStationWaiting(st2, type, amount, source_type, source_id);
03123   }
03124 
03125   return moved;
03126 }
03127 
03128 void BuildOilRig(TileIndex tile)
03129 {
03130   if (!Station::CanAllocateItem()) {
03131     DEBUG(misc, 0, "Can't allocate station for oilrig at 0x%X, reverting to oilrig only", tile);
03132     return;
03133   }
03134 
03135   Station *st = new Station(tile);
03136   st->town = ClosestTownFromTile(tile, UINT_MAX);
03137 
03138   st->string_id = GenerateStationName(st, tile, STATIONNAMING_OILRIG);
03139 
03140   assert(IsTileType(tile, MP_INDUSTRY));
03141   DeleteAnimatedTile(tile);
03142   MakeOilrig(tile, st->index, GetWaterClass(tile));
03143 
03144   st->owner = OWNER_NONE;
03145   st->airport_type = AT_OILRIG;
03146   st->airport_tile = tile;
03147   st->dock_tile = tile;
03148   st->facilities = FACIL_AIRPORT | FACIL_DOCK;
03149   st->build_date = _date;
03150 
03151   st->rect.BeforeAddTile(tile, StationRect::ADD_FORCE);
03152 
03153   for (CargoID j = 0; j < NUM_CARGO; j++) {
03154     st->goods[j].acceptance_pickup = 0;
03155     st->goods[j].days_since_pickup = 255;
03156     st->goods[j].rating = INITIAL_STATION_RATING;
03157     st->goods[j].last_speed = 0;
03158     st->goods[j].last_age = 255;
03159   }
03160 
03161   st->UpdateVirtCoord();
03162   UpdateStationAcceptance(st, false);
03163   st->RecomputeIndustriesNear();
03164 }
03165 
03166 void DeleteOilRig(TileIndex tile)
03167 {
03168   Station *st = Station::GetByTile(tile);
03169 
03170   MakeWaterKeepingClass(tile, OWNER_NONE);
03171   MarkTileDirtyByTile(tile);
03172 
03173   st->dock_tile = INVALID_TILE;
03174   st->airport_tile = INVALID_TILE;
03175   st->facilities &= ~(FACIL_AIRPORT | FACIL_DOCK);
03176   st->airport_flags = 0;
03177 
03178   st->rect.AfterRemoveTile(st, tile);
03179 
03180   st->UpdateVirtCoord();
03181   st->RecomputeIndustriesNear();
03182   if (!st->IsInUse()) delete st;
03183 }
03184 
03185 static void ChangeTileOwner_Station(TileIndex tile, Owner old_owner, Owner new_owner)
03186 {
03187   if (IsDriveThroughStopTile(tile)) {
03188     for (RoadType rt = ROADTYPE_ROAD; rt < ROADTYPE_END; rt++) {
03189       /* Update all roadtypes, no matter if they are present */
03190       if (GetRoadOwner(tile, rt) == old_owner) {
03191         SetRoadOwner(tile, rt, new_owner == INVALID_OWNER ? OWNER_NONE : new_owner);
03192       }
03193     }
03194   }
03195 
03196   if (!IsTileOwner(tile, old_owner)) return;
03197 
03198   if (new_owner != INVALID_OWNER) {
03199     /* for buoys, owner of tile is owner of water, st->owner == OWNER_NONE */
03200     SetTileOwner(tile, new_owner);
03201     InvalidateWindowClassesData(WC_STATION_LIST, 0);
03202   } else {
03203     if (IsDriveThroughStopTile(tile)) {
03204       /* Remove the drive-through road stop */
03205       DoCommand(tile, 0, (GetStationType(tile) == STATION_TRUCK) ? ROADSTOP_TRUCK : ROADSTOP_BUS, DC_EXEC | DC_BANKRUPT, CMD_REMOVE_ROAD_STOP);
03206       assert(IsTileType(tile, MP_ROAD));
03207       /* Change owner of tile and all roadtypes */
03208       ChangeTileOwner(tile, old_owner, new_owner);
03209     } else {
03210       DoCommand(tile, 0, 0, DC_EXEC | DC_BANKRUPT, CMD_LANDSCAPE_CLEAR);
03211       /* Set tile owner of water under (now removed) buoy and dock to OWNER_NONE.
03212        * Update owner of buoy if it was not removed (was in orders).
03213        * Do not update when owned by OWNER_WATER (sea and rivers). */
03214       if ((IsTileType(tile, MP_WATER) || IsBuoyTile(tile)) && IsTileOwner(tile, old_owner)) SetTileOwner(tile, OWNER_NONE);
03215     }
03216   }
03217 }
03218 
03227 static bool CanRemoveRoadWithStop(TileIndex tile, DoCommandFlag flags)
03228 {
03229   /* Yeah... water can always remove stops, right? */
03230   if (_current_company == OWNER_WATER) return true;
03231 
03232   Owner road_owner = _current_company;
03233   Owner tram_owner = _current_company;
03234 
03235   RoadTypes rts = GetRoadTypes(tile);
03236   if (HasBit(rts, ROADTYPE_ROAD)) road_owner = GetRoadOwner(tile, ROADTYPE_ROAD);
03237   if (HasBit(rts, ROADTYPE_TRAM)) tram_owner = GetRoadOwner(tile, ROADTYPE_TRAM);
03238 
03239   if ((road_owner != OWNER_TOWN && !CheckOwnership(road_owner)) || !CheckOwnership(tram_owner)) return false;
03240 
03241   return road_owner != OWNER_TOWN || CheckAllowRemoveRoad(tile, GetAnyRoadBits(tile, ROADTYPE_ROAD), OWNER_TOWN, ROADTYPE_ROAD, flags);
03242 }
03243 
03244 CommandCost ClearTile_Station(TileIndex tile, DoCommandFlag flags)
03245 {
03246   if (flags & DC_AUTO) {
03247     switch (GetStationType(tile)) {
03248       default: break;
03249       case STATION_RAIL:     return_cmd_error(STR_ERROR_MUST_DEMOLISH_RAILROAD);
03250       case STATION_WAYPOINT: return_cmd_error(STR_ERROR_BUILDING_MUST_BE_DEMOLISHED);
03251       case STATION_AIRPORT:  return_cmd_error(STR_ERROR_MUST_DEMOLISH_AIRPORT_FIRST);
03252       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);
03253       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);
03254       case STATION_BUOY:     return_cmd_error(STR_ERROR_BUOY_IN_THE_WAY);
03255       case STATION_DOCK:     return_cmd_error(STR_ERROR_MUST_DEMOLISH_DOCK_FIRST);
03256       case STATION_OILRIG:
03257         SetDParam(0, STR_INDUSTRY_NAME_OIL_RIG);
03258         return_cmd_error(STR_ERROR_UNMOVABLE_OBJECT_IN_THE_WAY);
03259     }
03260   }
03261 
03262   switch (GetStationType(tile)) {
03263     case STATION_RAIL:     return RemoveRailStation(tile, flags);
03264     case STATION_WAYPOINT: return RemoveRailWaypoint(tile, flags);
03265     case STATION_AIRPORT:  return RemoveAirport(tile, flags);
03266     case STATION_TRUCK:
03267       if (IsDriveThroughStopTile(tile) && !CanRemoveRoadWithStop(tile, flags))
03268         return_cmd_error(STR_ERROR_MUST_DEMOLISH_TRUCK_STATION_FIRST);
03269       return RemoveRoadStop(tile, flags);
03270     case STATION_BUS:
03271       if (IsDriveThroughStopTile(tile) && !CanRemoveRoadWithStop(tile, flags))
03272         return_cmd_error(STR_ERROR_MUST_DEMOLISH_BUS_STATION_FIRST);
03273       return RemoveRoadStop(tile, flags);
03274     case STATION_BUOY:     return RemoveBuoy(tile, flags);
03275     case STATION_DOCK:     return RemoveDock(tile, flags);
03276     default: break;
03277   }
03278 
03279   return CMD_ERROR;
03280 }
03281 
03282 static CommandCost TerraformTile_Station(TileIndex tile, DoCommandFlag flags, uint z_new, Slope tileh_new)
03283 {
03284   if (_settings_game.construction.build_on_slopes && AutoslopeEnabled()) {
03285     /* TODO: If you implement newgrf callback 149 'land slope check', you have to decide what to do with it here.
03286      *       TTDP does not call it.
03287      */
03288     if (!IsSteepSlope(tileh_new) && (GetTileMaxZ(tile) == z_new + GetSlopeMaxZ(tileh_new))) {
03289       switch (GetStationType(tile)) {
03290         case STATION_WAYPOINT:
03291         case STATION_RAIL: {
03292           DiagDirection direction = AxisToDiagDir(GetRailStationAxis(tile));
03293           if (!AutoslopeCheckForEntranceEdge(tile, z_new, tileh_new, direction)) break;
03294           if (!AutoslopeCheckForEntranceEdge(tile, z_new, tileh_new, ReverseDiagDir(direction))) break;
03295           return CommandCost(EXPENSES_CONSTRUCTION, _price[PR_BUILD_FOUNDATION]);
03296         }
03297 
03298         case STATION_AIRPORT:
03299           return CommandCost(EXPENSES_CONSTRUCTION, _price[PR_BUILD_FOUNDATION]);
03300 
03301         case STATION_TRUCK:
03302         case STATION_BUS: {
03303           DiagDirection direction = GetRoadStopDir(tile);
03304           if (!AutoslopeCheckForEntranceEdge(tile, z_new, tileh_new, direction)) break;
03305           if (IsDriveThroughStopTile(tile)) {
03306             if (!AutoslopeCheckForEntranceEdge(tile, z_new, tileh_new, ReverseDiagDir(direction))) break;
03307           }
03308           return CommandCost(EXPENSES_CONSTRUCTION, _price[PR_BUILD_FOUNDATION]);
03309         }
03310 
03311         default: break;
03312       }
03313     }
03314   }
03315   return DoCommand(tile, 0, 0, flags, CMD_LANDSCAPE_CLEAR);
03316 }
03317 
03318 
03319 extern const TileTypeProcs _tile_type_station_procs = {
03320   DrawTile_Station,           // draw_tile_proc
03321   GetSlopeZ_Station,          // get_slope_z_proc
03322   ClearTile_Station,          // clear_tile_proc
03323   NULL,                       // add_accepted_cargo_proc
03324   GetTileDesc_Station,        // get_tile_desc_proc
03325   GetTileTrackStatus_Station, // get_tile_track_status_proc
03326   ClickTile_Station,          // click_tile_proc
03327   AnimateTile_Station,        // animate_tile_proc
03328   TileLoop_Station,           // tile_loop_clear
03329   ChangeTileOwner_Station,    // change_tile_owner_clear
03330   NULL,                       // add_produced_cargo_proc
03331   VehicleEnter_Station,       // vehicle_enter_tile_proc
03332   GetFoundation_Station,      // get_foundation_proc
03333   TerraformTile_Station,      // terraform_tile_proc
03334 };

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