# station_cmd.cpp

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    00001 /* $Id$ */
    00002
    00003 /*
    00004  * This file is part of OpenTTD.
    00005  * OpenTTD is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, version 2.
    00006  * OpenTTD is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
    00007  * See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with OpenTTD. If not, see <http://www.gnu.org/licenses/>.
    00008  */
    00009
    00012 #include "stdafx.h"
    00013 #include "aircraft.h"
    00014 #include "bridge_map.h"
    00015 #include "cmd_helper.h"
    00016 #include "viewport_func.h"
    00017 #include "command_func.h"
    00018 #include "town.h"
    00019 #include "news_func.h"
    00020 #include "train.h"
    00021 #include "roadveh.h"
    00022 #include "industry.h"
    00023 #include "newgrf_cargo.h"
    00024 #include "newgrf_debug.h"
    00025 #include "newgrf_station.h"
    00026 #include "pathfinder/yapf/yapf_cache.h"
    00027 #include "road_internal.h" /* For drawing catenary/checking road removal */
    00028 #include "autoslope.h"
    00029 #include "water.h"
    00030 #include "station_gui.h"
    00031 #include "strings_func.h"
    00032 #include "clear_func.h"
    00033 #include "window_func.h"
    00034 #include "date_func.h"
    00035 #include "vehicle_func.h"
    00036 #include "string_func.h"
    00037 #include "animated_tile_func.h"
    00038 #include "elrail_func.h"
    00039 #include "station_base.h"
    00040 #include "roadstop_base.h"
    00041 #include "newgrf_railtype.h"
    00042 #include "waypoint_base.h"
    00043 #include "waypoint_func.h"
    00044 #include "pbs.h"
    00045 #include "debug.h"
    00046 #include "core/random_func.hpp"
    00047 #include "company_base.h"
    00048 #include "table/airporttile_ids.h"
    00049 #include "newgrf_airporttiles.h"
    00050 #include "order_backup.h"
    00051
    00052 #include "table/strings.h"
    00053
    00060 bool IsHangar(TileIndex t)
    00061 {
    00062   assert(IsTileType(t, MP_STATION));
    00063
    00064   /* If the tile isn't an airport there's no chance it's a hangar. */
    00065   if (!IsAirport(t)) return false;
    00066
    00067   const Station *st = Station::GetByTile(t);
    00068   const AirportSpec *as = st->airport.GetSpec();
    00069
    00070   for (uint i = 0; i < as->nof_depots; i++) {
    00071     if (st->airport.GetHangarTile(i) == t) return true;
    00072   }
    00073
    00074   return false;
    00075 }
    00076
    00084 template <class T>
    00085 CommandCost GetStationAround(TileArea ta, StationID closest_station, T **st)
    00086 {
    00087   ta.tile -= TileDiffXY(1, 1);
    00088   ta.w    += 2;
    00089   ta.h    += 2;
    00090
    00091   /* check around to see if there's any stations there */
    00092   TILE_AREA_LOOP(tile_cur, ta) {
    00093     if (IsTileType(tile_cur, MP_STATION)) {
    00094       StationID t = GetStationIndex(tile_cur);
    00095       if (!T::IsValidID(t)) continue;
    00096
    00097       if (closest_station == INVALID_STATION) {
    00098         closest_station = t;
    00099       } else if (closest_station != t) {
    00100         return_cmd_error(STR_ERROR_ADJOINS_MORE_THAN_ONE_EXISTING);
    00101       }
    00102     }
    00103   }
    00104   *st = (closest_station == INVALID_STATION) ? NULL : T::Get(closest_station);
    00105   return CommandCost();
    00106 }
    00107
    00113 typedef bool (*CMSAMatcher)(TileIndex tile);
    00114
    00121 static int CountMapSquareAround(TileIndex tile, CMSAMatcher cmp)
    00122 {
    00123   int num = 0;
    00124
    00125   for (int dx = -3; dx <= 3; dx++) {
    00126     for (int dy = -3; dy <= 3; dy++) {
    00127       TileIndex t = TileAddWrap(tile, dx, dy);
    00128       if (t != INVALID_TILE && cmp(t)) num++;
    00129     }
    00130   }
    00131
    00132   return num;
    00133 }
    00134
    00140 static bool CMSAMine(TileIndex tile)
    00141 {
    00142   /* No industry */
    00143   if (!IsTileType(tile, MP_INDUSTRY)) return false;
    00144
    00145   const Industry *ind = Industry::GetByTile(tile);
    00146
    00147   /* No extractive industry */
    00148   if ((GetIndustrySpec(ind->type)->life_type & INDUSTRYLIFE_EXTRACTIVE) == 0) return false;
    00149
    00150   for (uint i = 0; i < lengthof(ind->produced_cargo); i++) {
    00151     /* The industry extracts something non-liquid, i.e. no oil or plastic, so it is a mine.
    00152      * Also the production of passengers and mail is ignored. */
    00153     if (ind->produced_cargo[i] != CT_INVALID &&
    00154         (CargoSpec::Get(ind->produced_cargo[i])->classes & (CC_LIQUID | CC_PASSENGERS | CC_MAIL)) == 0) {
    00155       return true;
    00156     }
    00157   }
    00158
    00159   return false;
    00160 }
    00161
    00167 static bool CMSAWater(TileIndex tile)
    00168 {
    00169   return IsTileType(tile, MP_WATER) && IsWater(tile);
    00170 }
    00171
    00177 static bool CMSATree(TileIndex tile)
    00178 {
    00179   return IsTileType(tile, MP_TREES);
    00180 }
    00181
    00187 static bool CMSAForest(TileIndex tile)
    00188 {
    00189   /* No industry */
    00190   if (!IsTileType(tile, MP_INDUSTRY)) return false;
    00191
    00192   const Industry *ind = Industry::GetByTile(tile);
    00193
    00194   /* No extractive industry */
    00195   if ((GetIndustrySpec(ind->type)->life_type & INDUSTRYLIFE_ORGANIC) == 0) return false;
    00196
    00197   for (uint i = 0; i < lengthof(ind->produced_cargo); i++) {
    00198     /* The industry produces wood. */
    00199     if (ind->produced_cargo[i] != CT_INVALID && CargoSpec::Get(ind->produced_cargo[i])->label == 'WOOD') return true;
    00200   }
    00201
    00202   return false;
    00203 }
    00204
    00205 #define M(x) ((x) - STR_SV_STNAME)
    00206
    00207 enum StationNaming {
    00208   STATIONNAMING_RAIL,
    00209   STATIONNAMING_ROAD,
    00210   STATIONNAMING_AIRPORT,
    00211   STATIONNAMING_OILRIG,
    00212   STATIONNAMING_DOCK,
    00213   STATIONNAMING_HELIPORT,
    00214 };
    00215
    00217 struct StationNameInformation {
    00218   uint32 free_names;
    00219   bool *indtypes;
    00220 };
    00221
    00230 static bool FindNearIndustryName(TileIndex tile, void *user_data)
    00231 {
    00232   /* All already found industry types */
    00233   StationNameInformation *sni = (StationNameInformation*)user_data;
    00234   if (!IsTileType(tile, MP_INDUSTRY)) return false;
    00235
    00236   /* If the station name is undefined it means that it doesn't name a station */
    00237   IndustryType indtype = GetIndustryType(tile);
    00238   if (GetIndustrySpec(indtype)->station_name == STR_UNDEFINED) return false;
    00239
    00240   /* In all cases if an industry that provides a name is found two of
    00241    * the standard names will be disabled. */
    00242   sni->free_names &= ~(1 << M(STR_SV_STNAME_OILFIELD) | 1 << M(STR_SV_STNAME_MINES));
    00243   return !sni->indtypes[indtype];
    00244 }
    00245
    00246 static StringID GenerateStationName(Station *st, TileIndex tile, StationNaming name_class)
    00247 {
    00248   static const uint32 _gen_station_name_bits[] = {
    00249     0,                                       // STATIONNAMING_RAIL
    00250     0,                                       // STATIONNAMING_ROAD
    00251     1U << M(STR_SV_STNAME_AIRPORT),          // STATIONNAMING_AIRPORT
    00252     1U << M(STR_SV_STNAME_OILFIELD),         // STATIONNAMING_OILRIG
    00253     1U << M(STR_SV_STNAME_DOCKS),            // STATIONNAMING_DOCK
    00254     1U << M(STR_SV_STNAME_HELIPORT),         // STATIONNAMING_HELIPORT
    00255   };
    00256
    00257   const Town *t = st->town;
    00258   uint32 free_names = UINT32_MAX;
    00259
    00260   bool indtypes[NUM_INDUSTRYTYPES];
    00261   memset(indtypes, 0, sizeof(indtypes));
    00262
    00263   const Station *s;
    00264   FOR_ALL_STATIONS(s) {
    00265     if (s != st && s->town == t) {
    00266       if (s->indtype != IT_INVALID) {
    00267         indtypes[s->indtype] = true;
    00268         continue;
    00269       }
    00270       uint str = M(s->string_id);
    00271       if (str <= 0x20) {
    00272         if (str == M(STR_SV_STNAME_FOREST)) {
    00273           str = M(STR_SV_STNAME_WOODS);
    00274         }
    00275         ClrBit(free_names, str);
    00276       }
    00277     }
    00278   }
    00279
    00280   TileIndex indtile = tile;
    00281   StationNameInformation sni = { free_names, indtypes };
    00282   if (CircularTileSearch(&indtile, 7, FindNearIndustryName, &sni)) {
    00283     /* An industry has been found nearby */
    00284     IndustryType indtype = GetIndustryType(indtile);
    00285     const IndustrySpec *indsp = GetIndustrySpec(indtype);
    00286     /* STR_NULL means it only disables oil rig/mines */
    00287     if (indsp->station_name != STR_NULL) {
    00288       st->indtype = indtype;
    00289       return STR_SV_STNAME_FALLBACK;
    00290     }
    00291   }
    00292
    00293   /* Oil rigs/mines name could be marked not free by looking for a near by industry. */
    00294   free_names = sni.free_names;
    00295
    00296   /* check default names */
    00297   uint32 tmp = free_names & _gen_station_name_bits[name_class];
    00298   if (tmp != 0) return STR_SV_STNAME + FindFirstBit(tmp);
    00299
    00300   /* check mine? */
    00301   if (HasBit(free_names, M(STR_SV_STNAME_MINES))) {
    00302     if (CountMapSquareAround(tile, CMSAMine) >= 2) {
    00303       return STR_SV_STNAME_MINES;
    00304     }
    00305   }
    00306
    00307   /* check close enough to town to get central as name? */
    00308   if (DistanceMax(tile, t->xy) < 8) {
    00309     if (HasBit(free_names, M(STR_SV_STNAME))) return STR_SV_STNAME;
    00310
    00311     if (HasBit(free_names, M(STR_SV_STNAME_CENTRAL))) return STR_SV_STNAME_CENTRAL;
    00312   }
    00313
    00314   /* Check lakeside */
    00315   if (HasBit(free_names, M(STR_SV_STNAME_LAKESIDE)) &&
    00316       DistanceFromEdge(tile) < 20 &&
    00317       CountMapSquareAround(tile, CMSAWater) >= 5) {
    00318     return STR_SV_STNAME_LAKESIDE;
    00319   }
    00320
    00321   /* Check woods */
    00322   if (HasBit(free_names, M(STR_SV_STNAME_WOODS)) && (
    00323         CountMapSquareAround(tile, CMSATree) >= 8 ||
    00324         CountMapSquareAround(tile, CMSAForest) >= 2)
    00325       ) {
    00326     return _settings_game.game_creation.landscape == LT_TROPIC ? STR_SV_STNAME_FOREST : STR_SV_STNAME_WOODS;
    00327   }
    00328
    00329   /* check elevation compared to town */
    00330   uint z = GetTileZ(tile);
    00331   uint z2 = GetTileZ(t->xy);
    00332   if (z < z2) {
    00333     if (HasBit(free_names, M(STR_SV_STNAME_VALLEY))) return STR_SV_STNAME_VALLEY;
    00334   } else if (z > z2) {
    00335     if (HasBit(free_names, M(STR_SV_STNAME_HEIGHTS))) return STR_SV_STNAME_HEIGHTS;
    00336   }
    00337
    00338   /* check direction compared to town */
    00339   static const int8 _direction_and_table[] = {
    00340     ~( (1 << M(STR_SV_STNAME_WEST))  | (1 << M(STR_SV_STNAME_EAST)) | (1 << M(STR_SV_STNAME_NORTH)) ),
    00341     ~( (1 << M(STR_SV_STNAME_SOUTH)) | (1 << M(STR_SV_STNAME_WEST)) | (1 << M(STR_SV_STNAME_NORTH)) ),
    00342     ~( (1 << M(STR_SV_STNAME_SOUTH)) | (1 << M(STR_SV_STNAME_EAST)) | (1 << M(STR_SV_STNAME_NORTH)) ),
    00343     ~( (1 << M(STR_SV_STNAME_SOUTH)) | (1 << M(STR_SV_STNAME_WEST)) | (1 << M(STR_SV_STNAME_EAST)) ),
    00344   };
    00345
    00346   free_names &= _direction_and_table[
    00347     (TileX(tile) < TileX(t->xy)) +
    00348     (TileY(tile) < TileY(t->xy)) * 2];
    00349
    00350   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));
    00351   return (tmp == 0) ? STR_SV_STNAME_FALLBACK : (STR_SV_STNAME + FindFirstBit(tmp));
    00352 }
    00353 #undef M
    00354
    00360 static Station *GetClosestDeletedStation(TileIndex tile)
    00361 {
    00362   uint threshold = 8;
    00363   Station *best_station = NULL;
    00364   Station *st;
    00365
    00366   FOR_ALL_STATIONS(st) {
    00367     if (!st->IsInUse() && st->owner == _current_company) {
    00368       uint cur_dist = DistanceManhattan(tile, st->xy);
    00369
    00370       if (cur_dist < threshold) {
    00371         threshold = cur_dist;
    00372         best_station = st;
    00373       }
    00374     }
    00375   }
    00376
    00377   return best_station;
    00378 }
    00379
    00380
    00381 void Station::GetTileArea(TileArea *ta, StationType type) const
    00382 {
    00383   switch (type) {
    00384     case STATION_RAIL:
    00385       *ta = this->train_station;
    00386       return;
    00387
    00388     case STATION_AIRPORT:
    00389       *ta = this->airport;
    00390       return;
    00391
    00392     case STATION_TRUCK:
    00393       *ta = this->truck_station;
    00394       return;
    00395
    00396     case STATION_BUS:
    00397       *ta = this->bus_station;
    00398       return;
    00399
    00400     case STATION_DOCK:
    00401     case STATION_OILRIG:
    00402       ta->tile = this->dock_tile;
    00403       break;
    00404
    00405     default: NOT_REACHED();
    00406   }
    00407
    00408   ta->w = 1;
    00409   ta->h = 1;
    00410 }
    00411
    00415 void Station::UpdateVirtCoord()
    00416 {
    00417   Point pt = RemapCoords2(TileX(this->xy) * TILE_SIZE, TileY(this->xy) * TILE_SIZE);
    00418
    00419   pt.y -= 32;
    00420   if ((this->facilities & FACIL_AIRPORT) && this->airport.type == AT_OILRIG) pt.y -= 16;
    00421
    00422   SetDParam(0, this->index);
    00423   SetDParam(1, this->facilities);
    00424   this->sign.UpdatePosition(pt.x, pt.y, STR_VIEWPORT_STATION);
    00425
    00426   SetWindowDirty(WC_STATION_VIEW, this->index);
    00427 }
    00428
    00430 void UpdateAllStationVirtCoords()
    00431 {
    00432   BaseStation *st;
    00433
    00434   FOR_ALL_BASE_STATIONS(st) {
    00435     st->UpdateVirtCoord();
    00436   }
    00437 }
    00438
    00444 static uint GetAcceptanceMask(const Station *st)
    00445 {
    00446   uint mask = 0;
    00447
    00448   for (CargoID i = 0; i < NUM_CARGO; i++) {
    00449     if (HasBit(st->goods[i].acceptance_pickup, GoodsEntry::ACCEPTANCE)) mask |= 1 << i;
    00450   }
    00451   return mask;
    00452 }
    00453
    00458 static void ShowRejectOrAcceptNews(const Station *st, uint num_items, CargoID *cargo, StringID msg)
    00459 {
    00460   for (uint i = 0; i < num_items; i++) {
    00461     SetDParam(i + 1, CargoSpec::Get(cargo[i])->name);
    00462   }
    00463
    00464   SetDParam(0, st->index);
    00465   AddNewsItem(msg, NS_ACCEPTANCE, NR_STATION, st->index);
    00466 }
    00467
    00475 CargoArray GetProductionAroundTiles(TileIndex tile, int w, int h, int rad)
    00476 {
    00477   CargoArray produced;
    00478
    00479   int x = TileX(tile);
    00480   int y = TileY(tile);
    00481
    00482   /* expand the region by rad tiles on each side
    00483    * while making sure that we remain inside the board. */
    00484   int x2 = min(x + w + rad, MapSizeX());
    00485   int x1 = max(x - rad, 0);
    00486
    00487   int y2 = min(y + h + rad, MapSizeY());
    00488   int y1 = max(y - rad, 0);
    00489
    00490   assert(x1 < x2);
    00491   assert(y1 < y2);
    00492   assert(w > 0);
    00493   assert(h > 0);
    00494
    00495   TileArea ta(TileXY(x1, y1), TileXY(x2 - 1, y2 - 1));
    00496
    00497   /* Loop over all tiles to get the produced cargo of
    00498    * everything except industries */
    00499   TILE_AREA_LOOP(tile, ta) AddProducedCargo(tile, produced);
    00500
    00501   /* Loop over the industries. They produce cargo for
    00502    * anything that is within 'rad' from their bounding
    00503    * box. As such if you have e.g. a oil well the tile
    00504    * area loop might not hit an industry tile while
    00505    * the industry would produce cargo for the station.
    00506    */
    00507   const Industry *i;
    00508   FOR_ALL_INDUSTRIES(i) {
    00509     if (!ta.Intersects(i->location)) continue;
    00510
    00511     for (uint j = 0; j < lengthof(i->produced_cargo); j++) {
    00512       CargoID cargo = i->produced_cargo[j];
    00513       if (cargo != CT_INVALID) produced[cargo]++;
    00514     }
    00515   }
    00516
    00517   return produced;
    00518 }
    00519
    00528 CargoArray GetAcceptanceAroundTiles(TileIndex tile, int w, int h, int rad, uint32 *always_accepted)
    00529 {
    00530   CargoArray acceptance;
    00531   if (always_accepted != NULL) *always_accepted = 0;
    00532
    00533   int x = TileX(tile);
    00534   int y = TileY(tile);
    00535
    00536   /* expand the region by rad tiles on each side
    00537    * while making sure that we remain inside the board. */
    00538   int x2 = min(x + w + rad, MapSizeX());
    00539   int y2 = min(y + h + rad, MapSizeY());
    00540   int x1 = max(x - rad, 0);
    00541   int y1 = max(y - rad, 0);
    00542
    00543   assert(x1 < x2);
    00544   assert(y1 < y2);
    00545   assert(w > 0);
    00546   assert(h > 0);
    00547
    00548   for (int yc = y1; yc != y2; yc++) {
    00549     for (int xc = x1; xc != x2; xc++) {
    00550       TileIndex tile = TileXY(xc, yc);
    00551       AddAcceptedCargo(tile, acceptance, always_accepted);
    00552     }
    00553   }
    00554
    00555   return acceptance;
    00556 }
    00557
    00563 void UpdateStationAcceptance(Station *st, bool show_msg)
    00564 {
    00565   /* old accepted goods types */
    00566   uint old_acc = GetAcceptanceMask(st);
    00567
    00568   /* And retrieve the acceptance. */
    00569   CargoArray acceptance;
    00570   if (!st->rect.IsEmpty()) {
    00571     acceptance = GetAcceptanceAroundTiles(
    00572       TileXY(st->rect.left, st->rect.top),
    00573       st->rect.right  - st->rect.left + 1,
    00574       st->rect.bottom - st->rect.top  + 1,
    00575       st->GetCatchmentRadius(),
    00576       &st->always_accepted
    00577     );
    00578   }
    00579
    00580   /* Adjust in case our station only accepts fewer kinds of goods */
    00581   for (CargoID i = 0; i < NUM_CARGO; i++) {
    00582     uint amt = min(acceptance[i], 15);
    00583
    00584     /* Make sure the station can accept the goods type. */
    00585     bool is_passengers = IsCargoInClass(i, CC_PASSENGERS);
    00586     if ((!is_passengers && !(st->facilities & ~FACIL_BUS_STOP)) ||
    00587         (is_passengers && !(st->facilities & ~FACIL_TRUCK_STOP))) {
    00588       amt = 0;
    00589     }
    00590
    00591     SB(st->goods[i].acceptance_pickup, GoodsEntry::ACCEPTANCE, 1, amt >= 8);
    00592   }
    00593
    00594   /* Only show a message in case the acceptance was actually changed. */
    00595   uint new_acc = GetAcceptanceMask(st);
    00596   if (old_acc == new_acc) return;
    00597
    00598   /* show a message to report that the acceptance was changed? */
    00599   if (show_msg && st->owner == _local_company && st->IsInUse()) {
    00600     /* List of accept and reject strings for different number of
    00601      * cargo types */
    00602     static const StringID accept_msg[] = {
    00603       STR_NEWS_STATION_NOW_ACCEPTS_CARGO,
    00604       STR_NEWS_STATION_NOW_ACCEPTS_CARGO_AND_CARGO,
    00605     };
    00606     static const StringID reject_msg[] = {
    00607       STR_NEWS_STATION_NO_LONGER_ACCEPTS_CARGO,
    00608       STR_NEWS_STATION_NO_LONGER_ACCEPTS_CARGO_OR_CARGO,
    00609     };
    00610
    00611     /* Array of accepted and rejected cargo types */
    00612     CargoID accepts[2] = { CT_INVALID, CT_INVALID };
    00613     CargoID rejects[2] = { CT_INVALID, CT_INVALID };
    00614     uint num_acc = 0;
    00615     uint num_rej = 0;
    00616
    00617     /* Test each cargo type to see if its acceptange has changed */
    00618     for (CargoID i = 0; i < NUM_CARGO; i++) {
    00619       if (HasBit(new_acc, i)) {
    00620         if (!HasBit(old_acc, i) && num_acc < lengthof(accepts)) {
    00621           /* New cargo is accepted */
    00622           accepts[num_acc++] = i;
    00623         }
    00624       } else {
    00625         if (HasBit(old_acc, i) && num_rej < lengthof(rejects)) {
    00626           /* Old cargo is no longer accepted */
    00627           rejects[num_rej++] = i;
    00628         }
    00629       }
    00630     }
    00631
    00632     /* Show news message if there are any changes */
    00633     if (num_acc > 0) ShowRejectOrAcceptNews(st, num_acc, accepts, accept_msg[num_acc - 1]);
    00634     if (num_rej > 0) ShowRejectOrAcceptNews(st, num_rej, rejects, reject_msg[num_rej - 1]);
    00635   }
    00636
    00637   /* redraw the station view since acceptance changed */
    00638   SetWindowWidgetDirty(WC_STATION_VIEW, st->index, SVW_ACCEPTLIST);
    00639 }
    00640
    00641 static void UpdateStationSignCoord(BaseStation *st)
    00642 {
    00643   const StationRect *r = &st->rect;
    00644
    00645   if (r->IsEmpty()) return; // no tiles belong to this station
    00646
    00647   /* clamp sign coord to be inside the station rect */
    00648   st->xy = TileXY(ClampU(TileX(st->xy), r->left, r->right), ClampU(TileY(st->xy), r->top, r->bottom));
    00649   st->UpdateVirtCoord();
    00650 }
    00651
    00658 static void DeleteStationIfEmpty(BaseStation *st)
    00659 {
    00660   if (!st->IsInUse()) {
    00661     st->delete_ctr = 0;
    00662     InvalidateWindowData(WC_STATION_LIST, st->owner, 0);
    00663   }
    00664   /* station remains but it probably lost some parts - station sign should stay in the station boundaries */
    00665   UpdateStationSignCoord(st);
    00666 }
    00667
    00668 CommandCost ClearTile_Station(TileIndex tile, DoCommandFlag flags);
    00669
    00678 CommandCost CheckBuildableTile(TileIndex tile, uint invalid_dirs, int &allowed_z, bool check_bridge = true)
    00679 {
    00680   if (check_bridge && MayHaveBridgeAbove(tile) && IsBridgeAbove(tile)) {
    00681     return_cmd_error(STR_ERROR_MUST_DEMOLISH_BRIDGE_FIRST);
    00682   }
    00683
    00684   CommandCost ret = EnsureNoVehicleOnGround(tile);
    00685   if (ret.Failed()) return ret;
    00686
    00687   uint z;
    00688   Slope tileh = GetTileSlope(tile, &z);
    00689
    00690   /* Prohibit building if
    00691    *   1) The tile is "steep" (i.e. stretches two height levels).
    00692    *   2) The tile is non-flat and the build_on_slopes switch is disabled.
    00693    */
    00694   if (IsSteepSlope(tileh) ||
    00695       ((!_settings_game.construction.build_on_slopes) && tileh != SLOPE_FLAT)) {
    00696     return_cmd_error(STR_ERROR_FLAT_LAND_REQUIRED);
    00697   }
    00698
    00699   CommandCost cost(EXPENSES_CONSTRUCTION);
    00700   int flat_z = z;
    00701   if (tileh != SLOPE_FLAT) {
    00702     /* Forbid building if the tile faces a slope in a invalid direction. */
    00703     if ((HasBit(invalid_dirs, DIAGDIR_NE) && !(tileh & SLOPE_NE)) ||
    00704         (HasBit(invalid_dirs, DIAGDIR_SE) && !(tileh & SLOPE_SE)) ||
    00705         (HasBit(invalid_dirs, DIAGDIR_SW) && !(tileh & SLOPE_SW)) ||
    00706         (HasBit(invalid_dirs, DIAGDIR_NW) && !(tileh & SLOPE_NW))) {
    00707       return_cmd_error(STR_ERROR_FLAT_LAND_REQUIRED);
    00708     }
    00709     cost.AddCost(_price[PR_BUILD_FOUNDATION]);
    00710     flat_z += TILE_HEIGHT;
    00711   }
    00712
    00713   /* The level of this tile must be equal to allowed_z. */
    00714   if (allowed_z < 0) {
    00715     /* First tile. */
    00716     allowed_z = flat_z;
    00717   } else if (allowed_z != flat_z) {
    00718     return_cmd_error(STR_ERROR_FLAT_LAND_REQUIRED);
    00719   }
    00720
    00721   return cost;
    00722 }
    00723
    00730 CommandCost CheckFlatLand(TileArea tile_area, DoCommandFlag flags)
    00731 {
    00732   CommandCost cost(EXPENSES_CONSTRUCTION);
    00733   int allowed_z = -1;
    00734
    00735   TILE_AREA_LOOP(tile_cur, tile_area) {
    00736     CommandCost ret = CheckBuildableTile(tile_cur, 0, allowed_z);
    00737     if (ret.Failed()) return ret;
    00738     cost.AddCost(ret);
    00739
    00740     ret = DoCommand(tile_cur, 0, 0, flags, CMD_LANDSCAPE_CLEAR);
    00741     if (ret.Failed()) return ret;
    00742     cost.AddCost(ret);
    00743   }
    00744
    00745   return cost;
    00746 }
    00747
    00758 static CommandCost CheckFlatLandRailStation(TileArea tile_area, DoCommandFlag flags, uint invalid_dirs, StationID *station, RailType rt, SmallVector<Train *, 4> &affected_vehicles)
    00759 {
    00760   CommandCost cost(EXPENSES_CONSTRUCTION);
    00761   int allowed_z = -1;
    00762
    00763   TILE_AREA_LOOP(tile_cur, tile_area) {
    00764     CommandCost ret = CheckBuildableTile(tile_cur, invalid_dirs, allowed_z);
    00765     if (ret.Failed()) return ret;
    00766     cost.AddCost(ret);
    00767
    00768     /* if station is set, then we have special handling to allow building on top of already existing stations.
    00769      * so station points to INVALID_STATION if we can build on any station.
    00770      * Or it points to a station if we're only allowed to build on exactly that station. */
    00771     if (station != NULL && IsTileType(tile_cur, MP_STATION)) {
    00772       if (!IsRailStation(tile_cur)) {
    00773         return ClearTile_Station(tile_cur, DC_AUTO); // get error message
    00774       } else {
    00775         StationID st = GetStationIndex(tile_cur);
    00776         if (*station == INVALID_STATION) {
    00777           *station = st;
    00778         } else if (*station != st) {
    00779           return_cmd_error(STR_ERROR_ADJOINS_MORE_THAN_ONE_EXISTING);
    00780         }
    00781       }
    00782     } else {
    00783       /* Rail type is only valid when building a railway station; if station to
    00784        * build isn't a rail station it's INVALID_RAILTYPE. */
    00785       if (rt != INVALID_RAILTYPE &&
    00786           IsPlainRailTile(tile_cur) && !HasSignals(tile_cur) &&
    00787           HasPowerOnRail(GetRailType(tile_cur), rt)) {
    00788         /* Allow overbuilding if the tile:
    00789          *  - has rail, but no signals
    00790          *  - it has exactly one track
    00791          *  - the track is in line with the station
    00792          *  - the current rail type has power on the to-be-built type (e.g. convert normal rail to el rail)
    00793          */
    00794         TrackBits tracks = GetTrackBits(tile_cur);
    00795         Track track = RemoveFirstTrack(&tracks);
    00796         Track expected_track = HasBit(invalid_dirs, DIAGDIR_NE) ? TRACK_X : TRACK_Y;
    00797
    00798         if (tracks == TRACK_BIT_NONE && track == expected_track) {
    00799           /* Check for trains having a reservation for this tile. */
    00800           if (HasBit(GetRailReservationTrackBits(tile_cur), track)) {
    00801             Train *v = GetTrainForReservation(tile_cur, track);
    00802             if (v != NULL) {
    00803               *affected_vehicles.Append() = v;
    00804             }
    00805           }
    00806           CommandCost ret = DoCommand(tile_cur, 0, track, flags, CMD_REMOVE_SINGLE_RAIL);
    00807           if (ret.Failed()) return ret;
    00808           cost.AddCost(ret);
    00809           /* With flags & ~DC_EXEC CmdLandscapeClear would fail since the rail still exists */
    00810           continue;
    00811         }
    00812       }
    00813       ret = DoCommand(tile_cur, 0, 0, flags, CMD_LANDSCAPE_CLEAR);
    00814       if (ret.Failed()) return ret;
    00815       cost.AddCost(ret);
    00816     }
    00817   }
    00818
    00819   return cost;
    00820 }
    00821
    00834 static CommandCost CheckFlatLandRoadStop(TileArea tile_area, DoCommandFlag flags, uint invalid_dirs, bool is_drive_through, bool is_truck_stop, Axis axis, StationID *station, RoadTypes rts)
    00835 {
    00836   CommandCost cost(EXPENSES_CONSTRUCTION);
    00837   int allowed_z = -1;
    00838
    00839   TILE_AREA_LOOP(cur_tile, tile_area) {
    00840     CommandCost ret = CheckBuildableTile(cur_tile, invalid_dirs, allowed_z);
    00841     if (ret.Failed()) return ret;
    00842     cost.AddCost(ret);
    00843
    00844     /* If station is set, then we have special handling to allow building on top of already existing stations.
    00845      * Station points to INVALID_STATION if we can build on any station.
    00846      * Or it points to a station if we're only allowed to build on exactly that station. */
    00847     if (station != NULL && IsTileType(cur_tile, MP_STATION)) {
    00848       if (!IsRoadStop(cur_tile)) {
    00849         return ClearTile_Station(cur_tile, DC_AUTO); // Get error message.
    00850       } else {
    00851         if (is_truck_stop != IsTruckStop(cur_tile) ||
    00852             is_drive_through != IsDriveThroughStopTile(cur_tile)) {
    00853           return ClearTile_Station(cur_tile, DC_AUTO); // Get error message.
    00854         }
    00855         /* Drive-through station in the wrong direction. */
    00856         if (is_drive_through && IsDriveThroughStopTile(cur_tile) && DiagDirToAxis(GetRoadStopDir(cur_tile)) != axis){
    00857           return_cmd_error(STR_ERROR_DRIVE_THROUGH_DIRECTION);
    00858         }
    00859         StationID st = GetStationIndex(cur_tile);
    00860         if (*station == INVALID_STATION) {
    00861           *station = st;
    00862         } else if (*station != st) {
    00863           return_cmd_error(STR_ERROR_ADJOINS_MORE_THAN_ONE_EXISTING);
    00864         }
    00865       }
    00866     } else {
    00867       bool build_over_road = is_drive_through && IsNormalRoadTile(cur_tile);
    00868       /* Road bits in the wrong direction. */
    00869       RoadBits rb = IsNormalRoadTile(cur_tile) ? GetAllRoadBits(cur_tile) : ROAD_NONE;
    00870       if (build_over_road && (rb & (axis == AXIS_X ? ROAD_Y : ROAD_X)) != 0) {
    00871         /* Someone was pedantic and *NEEDED* three fracking different error messages. */
    00872         switch (CountBits(rb)) {
    00873           case 1:
    00874             return_cmd_error(STR_ERROR_DRIVE_THROUGH_DIRECTION);
    00875
    00876           case 2:
    00877             if (rb == ROAD_X || rb == ROAD_Y) return_cmd_error(STR_ERROR_DRIVE_THROUGH_DIRECTION);
    00878             return_cmd_error(STR_ERROR_DRIVE_THROUGH_CORNER);
    00879
    00880           default: // 3 or 4
    00881             return_cmd_error(STR_ERROR_DRIVE_THROUGH_JUNCTION);
    00882         }
    00883       }
    00884
    00885       RoadTypes cur_rts = IsNormalRoadTile(cur_tile) ? GetRoadTypes(cur_tile) : ROADTYPES_NONE;
    00886       uint num_roadbits = 0;
    00887       if (build_over_road) {
    00888         /* There is a road, check if we can build road+tram stop over it. */
    00889         if (HasBit(cur_rts, ROADTYPE_ROAD)) {
    00890           Owner road_owner = GetRoadOwner(cur_tile, ROADTYPE_ROAD);
    00891           if (road_owner == OWNER_TOWN) {
    00892             if (!_settings_game.construction.road_stop_on_town_road) return_cmd_error(STR_ERROR_DRIVE_THROUGH_ON_TOWN_ROAD);
    00893           } else if (!_settings_game.construction.road_stop_on_competitor_road && road_owner != OWNER_NONE) {
    00894             CommandCost ret = CheckOwnership(road_owner);
    00895             if (ret.Failed()) return ret;
    00896           }
    00897           num_roadbits += CountBits(GetRoadBits(cur_tile, ROADTYPE_ROAD));
    00898         }
    00899
    00900         /* There is a tram, check if we can build road+tram stop over it. */
    00901         if (HasBit(cur_rts, ROADTYPE_TRAM)) {
    00902           Owner tram_owner = GetRoadOwner(cur_tile, ROADTYPE_TRAM);
    00903           if (!_settings_game.construction.road_stop_on_competitor_road && tram_owner != OWNER_NONE) {
    00904             CommandCost ret = CheckOwnership(tram_owner);
    00905             if (ret.Failed()) return ret;
    00906           }
    00907           num_roadbits += CountBits(GetRoadBits(cur_tile, ROADTYPE_TRAM));
    00908         }
    00909
    00910         /* Take into account existing roadbits. */
    00911         rts |= cur_rts;
    00912       } else {
    00913         ret = DoCommand(cur_tile, 0, 0, flags, CMD_LANDSCAPE_CLEAR);
    00914         if (ret.Failed()) return ret;
    00915         cost.AddCost(ret);
    00916       }
    00917
    00918       uint roadbits_to_build = CountBits(rts) * 2 - num_roadbits;
    00919       cost.AddCost(_price[PR_BUILD_ROAD] * roadbits_to_build);
    00920     }
    00921   }
    00922
    00923   return cost;
    00924 }
    00925
    00933 CommandCost CanExpandRailStation(const BaseStation *st, TileArea &new_ta, Axis axis)
    00934 {
    00935   TileArea cur_ta = st->train_station;
    00936
    00937   /* determine new size of train station region.. */
    00938   int x = min(TileX(cur_ta.tile), TileX(new_ta.tile));
    00939   int y = min(TileY(cur_ta.tile), TileY(new_ta.tile));
    00940   new_ta.w = max(TileX(cur_ta.tile) + cur_ta.w, TileX(new_ta.tile) + new_ta.w) - x;
    00941   new_ta.h = max(TileY(cur_ta.tile) + cur_ta.h, TileY(new_ta.tile) + new_ta.h) - y;
    00942   new_ta.tile = TileXY(x, y);
    00943
    00944   /* make sure the final size is not too big. */
    00945   if (new_ta.w > _settings_game.station.station_spread || new_ta.h > _settings_game.station.station_spread) {
    00946     return_cmd_error(STR_ERROR_STATION_TOO_SPREAD_OUT);
    00947   }
    00948
    00949   return CommandCost();
    00950 }
    00951
    00952 static inline byte *CreateSingle(byte *layout, int n)
    00953 {
    00954   int i = n;
    00955   do *layout++ = 0; while (--i);
    00956   layout[((n - 1) >> 1) - n] = 2;
    00957   return layout;
    00958 }
    00959
    00960 static inline byte *CreateMulti(byte *layout, int n, byte b)
    00961 {
    00962   int i = n;
    00963   do *layout++ = b; while (--i);
    00964   if (n > 4) {
    00965     layout[0 - n] = 0;
    00966     layout[n - 1 - n] = 0;
    00967   }
    00968   return layout;
    00969 }
    00970
    00971 void GetStationLayout(byte *layout, int numtracks, int plat_len, const StationSpec *statspec)
    00972 {
    00973   if (statspec != NULL && statspec->lengths >= plat_len &&
    00974       statspec->platforms[plat_len - 1] >= numtracks &&
    00975       statspec->layouts[plat_len - 1][numtracks - 1]) {
    00976     /* Custom layout defined, follow it. */
    00977     memcpy(layout, statspec->layouts[plat_len - 1][numtracks - 1],
    00978       plat_len * numtracks);
    00979     return;
    00980   }
    00981
    00982   if (plat_len == 1) {
    00983     CreateSingle(layout, numtracks);
    00984   } else {
    00985     if (numtracks & 1) layout = CreateSingle(layout, plat_len);
    00986     numtracks >>= 1;
    00987
    00988     while (--numtracks >= 0) {
    00989       layout = CreateMulti(layout, plat_len, 4);
    00990       layout = CreateMulti(layout, plat_len, 6);
    00991     }
    00992   }
    00993 }
    00994
    01006 template <class T, StringID error_message>
    01007 CommandCost FindJoiningBaseStation(StationID existing_station, StationID station_to_join, bool adjacent, TileArea ta, T **st)
    01008 {
    01009   assert(*st == NULL);
    01010   bool check_surrounding = true;
    01011
    01012   if (_settings_game.station.adjacent_stations) {
    01013     if (existing_station != INVALID_STATION) {
    01014       if (adjacent && existing_station != station_to_join) {
    01015         /* You can't build an adjacent station over the top of one that
    01016          * already exists. */
    01017         return_cmd_error(error_message);
    01018       } else {
    01019         /* Extend the current station, and don't check whether it will
    01020          * be near any other stations. */
    01021         *st = T::GetIfValid(existing_station);
    01022         check_surrounding = (*st == NULL);
    01023       }
    01024     } else {
    01025       /* There's no station here. Don't check the tiles surrounding this
    01026        * one if the company wanted to build an adjacent station. */
    01027       if (adjacent) check_surrounding = false;
    01028     }
    01029   }
    01030
    01031   if (check_surrounding) {
    01032     /* Make sure there are no similar stations around us. */
    01033     CommandCost ret = GetStationAround(ta, existing_station, st);
    01034     if (ret.Failed()) return ret;
    01035   }
    01036
    01037   /* Distant join */
    01038   if (*st == NULL && station_to_join != INVALID_STATION) *st = T::GetIfValid(station_to_join);
    01039
    01040   return CommandCost();
    01041 }
    01042
    01052 static CommandCost FindJoiningStation(StationID existing_station, StationID station_to_join, bool adjacent, TileArea ta, Station **st)
    01053 {
    01054   return FindJoiningBaseStation<Station, STR_ERROR_MUST_REMOVE_RAILWAY_STATION_FIRST>(existing_station, station_to_join, adjacent, ta, st);
    01055 }
    01056
    01066 CommandCost FindJoiningWaypoint(StationID existing_waypoint, StationID waypoint_to_join, bool adjacent, TileArea ta, Waypoint **wp)
    01067 {
    01068   return FindJoiningBaseStation<Waypoint, STR_ERROR_MUST_REMOVE_RAILWAYPOINT_FIRST>(existing_waypoint, waypoint_to_join, adjacent, ta, wp);
    01069 }
    01070
    01088 CommandCost CmdBuildRailStation(TileIndex tile_org, DoCommandFlag flags, uint32 p1, uint32 p2, const char *text)
    01089 {
    01090   /* Unpack parameters */
    01091   RailType rt    = Extract<RailType, 0, 4>(p1);
    01092   Axis axis      = Extract<Axis, 4, 1>(p1);
    01093   byte numtracks = GB(p1,  8, 8);
    01094   byte plat_len  = GB(p1, 16, 8);
    01095   bool adjacent  = HasBit(p1, 24);
    01096
    01097   StationClassID spec_class = Extract<StationClassID, 0, 8>(p2);
    01098   byte spec_index           = GB(p2, 8, 8);
    01099   StationID station_to_join = GB(p2, 16, 16);
    01100
    01101   /* Does the authority allow this? */
    01102   CommandCost ret = CheckIfAuthorityAllowsNewStation(tile_org, flags);
    01103   if (ret.Failed()) return ret;
    01104
    01105   if (!ValParamRailtype(rt)) return CMD_ERROR;
    01106
    01107   /* Check if the given station class is valid */
    01108   if ((uint)spec_class >= StationClass::GetCount() || spec_class == STAT_CLASS_WAYP) return CMD_ERROR;
    01109   if (spec_index >= StationClass::GetCount(spec_class)) return CMD_ERROR;
    01110   if (plat_len == 0 || numtracks == 0) return CMD_ERROR;
    01111
    01112   int w_org, h_org;
    01113   if (axis == AXIS_X) {
    01114     w_org = plat_len;
    01115     h_org = numtracks;
    01116   } else {
    01117     h_org = plat_len;
    01118     w_org = numtracks;
    01119   }
    01120
    01121   bool reuse = (station_to_join != NEW_STATION);
    01122   if (!reuse) station_to_join = INVALID_STATION;
    01123   bool distant_join = (station_to_join != INVALID_STATION);
    01124
    01125   if (distant_join && (!_settings_game.station.distant_join_stations || !Station::IsValidID(station_to_join))) return CMD_ERROR;
    01126
    01127   if (h_org > _settings_game.station.station_spread || w_org > _settings_game.station.station_spread) return CMD_ERROR;
    01128
    01129   /* these values are those that will be stored in train_tile and station_platforms */
    01130   TileArea new_location(tile_org, w_org, h_org);
    01131
    01132   /* Make sure the area below consists of clear tiles. (OR tiles belonging to a certain rail station) */
    01133   StationID est = INVALID_STATION;
    01134   SmallVector<Train *, 4> affected_vehicles;
    01135   /* Clear the land below the station. */
    01136   CommandCost cost = CheckFlatLandRailStation(TileArea(tile_org, w_org, h_org), flags, 5 << axis, &est, rt, affected_vehicles);
    01137   if (cost.Failed()) return cost;
    01138   /* Add construction expenses. */
    01139   cost.AddCost((numtracks * _price[PR_BUILD_STATION_RAIL] + _price[PR_BUILD_STATION_RAIL_LENGTH]) * plat_len);
    01140   cost.AddCost(numtracks * plat_len * RailBuildCost(rt));
    01141
    01142   Station *st = NULL;
    01143   ret = FindJoiningStation(est, station_to_join, adjacent, new_location, &st);
    01144   if (ret.Failed()) return ret;
    01145
    01146   /* See if there is a deleted station close to us. */
    01147   if (st == NULL && reuse) st = GetClosestDeletedStation(tile_org);
    01148
    01149   if (st != NULL) {
    01150     /* Reuse an existing station. */
    01151     if (st->owner != _current_company) return_cmd_error(STR_ERROR_TOO_CLOSE_TO_ANOTHER_STATION);
    01152
    01153     if (st->train_station.tile != INVALID_TILE) {
    01154       CommandCost ret = CanExpandRailStation(st, new_location, axis);
    01155       if (ret.Failed()) return ret;
    01156     }
    01157
    01158     /* XXX can't we pack this in the "else" part of the if above? */
    01159     CommandCost ret = st->rect.BeforeAddRect(tile_org, w_org, h_org, StationRect::ADD_TEST);
    01160     if (ret.Failed()) return ret;
    01161   } else {
    01162     /* allocate and initialize new station */
    01163     if (!Station::CanAllocateItem()) return_cmd_error(STR_ERROR_TOO_MANY_STATIONS_LOADING);
    01164
    01165     if (flags & DC_EXEC) {
    01166       st = new Station(tile_org);
    01167
    01168       st->town = ClosestTownFromTile(tile_org, UINT_MAX);
    01169       st->string_id = GenerateStationName(st, tile_org, STATIONNAMING_RAIL);
    01170
    01171       if (Company::IsValidID(_current_company)) {
    01172         SetBit(st->town->have_ratings, _current_company);
    01173       }
    01174     }
    01175   }
    01176
    01177   /* Check if we can allocate a custom stationspec to this station */
    01178   const StationSpec *statspec = StationClass::Get(spec_class, spec_index);
    01179   int specindex = AllocateSpecToStation(statspec, st, (flags & DC_EXEC) != 0);
    01180   if (specindex == -1) return_cmd_error(STR_ERROR_TOO_MANY_STATION_SPECS);
    01181
    01182   if (statspec != NULL) {
    01183     /* Perform NewStation checks */
    01184
    01185     /* Check if the station size is permitted */
    01186     if (HasBit(statspec->disallowed_platforms, numtracks - 1) || HasBit(statspec->disallowed_lengths, plat_len - 1)) {
    01187       return CMD_ERROR;
    01188     }
    01189
    01190     /* Check if the station is buildable */
    01191     if (HasBit(statspec->callback_mask, CBM_STATION_AVAIL) && GB(GetStationCallback(CBID_STATION_AVAILABILITY, 0, 0, statspec, NULL, INVALID_TILE), 0, 8) == 0) {
    01192       return CMD_ERROR;
    01193     }
    01194   }
    01195
    01196   if (flags & DC_EXEC) {
    01197     TileIndexDiff tile_delta;
    01198     byte *layout_ptr;
    01199     byte numtracks_orig;
    01200     Track track;
    01201
    01202     st->train_station = new_location;
    01203     st->AddFacility(FACIL_TRAIN, new_location.tile);
    01204
    01205     st->rect.BeforeAddRect(tile_org, w_org, h_org, StationRect::ADD_TRY);
    01206
    01207     if (statspec != NULL) {
    01208       /* Include this station spec's animation trigger bitmask
    01209        * in the station's cached copy. */
    01210       st->cached_anim_triggers |= statspec->animation.triggers;
    01211     }
    01212
    01213     tile_delta = (axis == AXIS_X ? TileDiffXY(1, 0) : TileDiffXY(0, 1));
    01214     track = AxisToTrack(axis);
    01215
    01216     layout_ptr = AllocaM(byte, numtracks * plat_len);
    01217     GetStationLayout(layout_ptr, numtracks, plat_len, statspec);
    01218
    01219     numtracks_orig = numtracks;
    01220
    01221     do {
    01222       TileIndex tile = tile_org;
    01223       int w = plat_len;
    01224       do {
    01225         byte layout = *layout_ptr++;
    01226         if (IsRailStationTile(tile) && HasStationReservation(tile)) {
    01227           /* Check for trains having a reservation for this tile. */
    01228           Train *v = GetTrainForReservation(tile, AxisToTrack(GetRailStationAxis(tile)));
    01229           if (v != NULL) {
    01230             FreeTrainTrackReservation(v);
    01231             *affected_vehicles.Append() = v;
    01232             if (IsRailStationTile(v->tile)) SetRailStationPlatformReservation(v->tile, TrackdirToExitdir(v->GetVehicleTrackdir()), false);
    01233             for (; v->Next() != NULL; v = v->Next()) { }
    01234             if (IsRailStationTile(v->tile)) SetRailStationPlatformReservation(v->tile, TrackdirToExitdir(ReverseTrackdir(v->GetVehicleTrackdir())), false);
    01235           }
    01236         }
    01237
    01238         /* Remove animation if overbuilding */
    01239         DeleteAnimatedTile(tile);
    01240         byte old_specindex = HasStationTileRail(tile) ? GetCustomStationSpecIndex(tile) : 0;
    01241         MakeRailStation(tile, st->owner, st->index, axis, layout & ~1, rt);
    01242         /* Free the spec if we overbuild something */
    01243         DeallocateSpecFromStation(st, old_specindex);
    01244
    01245         SetCustomStationSpecIndex(tile, specindex);
    01246         SetStationTileRandomBits(tile, GB(Random(), 0, 4));
    01247         SetAnimationFrame(tile, 0);
    01248
    01249         if (statspec != NULL) {
    01250           /* Use a fixed axis for GetPlatformInfo as our platforms / numtracks are always the right way around */
    01251           uint32 platinfo = GetPlatformInfo(AXIS_X, 0, plat_len, numtracks_orig, plat_len - w, numtracks_orig - numtracks, false);
    01252
    01253           /* As the station is not yet completely finished, the station does not yet exist. */
    01254           uint16 callback = GetStationCallback(CBID_STATION_TILE_LAYOUT, platinfo, 0, statspec, NULL, tile);
    01255           if (callback != CALLBACK_FAILED && callback < 8) SetStationGfx(tile, (callback & ~1) + axis);
    01256
    01257           /* Trigger station animation -- after building? */
    01258           TriggerStationAnimation(st, tile, SAT_BUILT);
    01259         }
    01260
    01261         tile += tile_delta;
    01262       } while (--w);
    01263       AddTrackToSignalBuffer(tile_org, track, _current_company);
    01264       YapfNotifyTrackLayoutChange(tile_org, track);
    01265       tile_org += tile_delta ^ TileDiffXY(1, 1); // perpendicular to tile_delta
    01266     } while (--numtracks);
    01267
    01268     for (uint i = 0; i < affected_vehicles.Length(); ++i) {
    01269       /* Restore reservations of trains. */
    01270       Train *v = affected_vehicles[i];
    01271       if (IsRailStationTile(v->tile)) SetRailStationPlatformReservation(v->tile, TrackdirToExitdir(v->GetVehicleTrackdir()), true);
    01272       TryPathReserve(v, true, true);
    01273       for (; v->Next() != NULL; v = v->Next()) { }
    01274       if (IsRailStationTile(v->tile)) SetRailStationPlatformReservation(v->tile, TrackdirToExitdir(ReverseTrackdir(v->GetVehicleTrackdir())), true);
    01275     }
    01276
    01277     st->MarkTilesDirty(false);
    01278     st->UpdateVirtCoord();
    01279     UpdateStationAcceptance(st, false);
    01280     st->RecomputeIndustriesNear();
    01281     InvalidateWindowData(WC_SELECT_STATION, 0, 0);
    01282     InvalidateWindowData(WC_STATION_LIST, st->owner, 0);
    01283     SetWindowWidgetDirty(WC_STATION_VIEW, st->index, SVW_TRAINS);
    01284   }
    01285
    01286   return cost;
    01287 }
    01288
    01289 static void MakeRailStationAreaSmaller(BaseStation *st)
    01290 {
    01291   TileArea ta = st->train_station;
    01292
    01293 restart:
    01294
    01295   /* too small? */
    01296   if (ta.w != 0 && ta.h != 0) {
    01297     /* check the left side, x = constant, y changes */
    01298     for (uint i = 0; !st->TileBelongsToRailStation(ta.tile + TileDiffXY(0, i));) {
    01299       /* the left side is unused? */
    01300       if (++i == ta.h) {
    01301         ta.tile += TileDiffXY(1, 0);
    01302         ta.w--;
    01303         goto restart;
    01304       }
    01305     }
    01306
    01307     /* check the right side, x = constant, y changes */
    01308     for (uint i = 0; !st->TileBelongsToRailStation(ta.tile + TileDiffXY(ta.w - 1, i));) {
    01309       /* the right side is unused? */
    01310       if (++i == ta.h) {
    01311         ta.w--;
    01312         goto restart;
    01313       }
    01314     }
    01315
    01316     /* check the upper side, y = constant, x changes */
    01317     for (uint i = 0; !st->TileBelongsToRailStation(ta.tile + TileDiffXY(i, 0));) {
    01318       /* the left side is unused? */
    01319       if (++i == ta.w) {
    01320         ta.tile += TileDiffXY(0, 1);
    01321         ta.h--;
    01322         goto restart;
    01323       }
    01324     }
    01325
    01326     /* check the lower side, y = constant, x changes */
    01327     for (uint i = 0; !st->TileBelongsToRailStation(ta.tile + TileDiffXY(i, ta.h - 1));) {
    01328       /* the left side is unused? */
    01329       if (++i == ta.w) {
    01330         ta.h--;
    01331         goto restart;
    01332       }
    01333     }
    01334   } else {
    01335     ta.Clear();
    01336   }
    01337
    01338   st->train_station = ta;
    01339 }
    01340
    01351 template <class T>
    01352 CommandCost RemoveFromRailBaseStation(TileArea ta, SmallVector<T *, 4> &affected_stations, DoCommandFlag flags, Money removal_cost, bool keep_rail)
    01353 {
    01354   /* Count of the number of tiles removed */
    01355   int quantity = 0;
    01356   CommandCost total_cost(EXPENSES_CONSTRUCTION);
    01357
    01358   /* Do the action for every tile into the area */
    01359   TILE_AREA_LOOP(tile, ta) {
    01360     /* Make sure the specified tile is a rail station */
    01361     if (!HasStationTileRail(tile)) continue;
    01362
    01363     /* If there is a vehicle on ground, do not allow to remove (flood) the tile */
    01364     CommandCost ret = EnsureNoVehicleOnGround(tile);
    01365     if (ret.Failed()) continue;
    01366
    01367     /* Check ownership of station */
    01368     T *st = T::GetByTile(tile);
    01369     if (st == NULL) continue;
    01370
    01371     if (_current_company != OWNER_WATER) {
    01372       CommandCost ret = CheckOwnership(st->owner);
    01373       if (ret.Failed()) continue;
    01374     }
    01375
    01376     /* If we reached here, the tile is valid so increase the quantity of tiles we will remove */
    01377     quantity++;
    01378
    01379     if (keep_rail || IsStationTileBlocked(tile)) {
    01380       /* Don't refund the 'steel' of the track when we keep the
    01381        *  rail, or when the tile didn't have any rail at all. */
    01382       total_cost.AddCost(-_price[PR_CLEAR_RAIL]);
    01383     }
    01384
    01385     if (flags & DC_EXEC) {
    01386       /* read variables before the station tile is removed */
    01387       uint specindex = GetCustomStationSpecIndex(tile);
    01388       Track track = GetRailStationTrack(tile);
    01389       Owner owner = GetTileOwner(tile);
    01390       RailType rt = GetRailType(tile);
    01391       Train *v = NULL;
    01392
    01393       if (HasStationReservation(tile)) {
    01394         v = GetTrainForReservation(tile, track);
    01395         if (v != NULL) {
    01396           /* Free train reservation. */
    01397           FreeTrainTrackReservation(v);
    01398           if (IsRailStationTile(v->tile)) SetRailStationPlatformReservation(v->tile, TrackdirToExitdir(v->GetVehicleTrackdir()), false);
    01399           Vehicle *temp = v;
    01400           for (; temp->Next() != NULL; temp = temp->Next()) { }
    01401           if (IsRailStationTile(temp->tile)) SetRailStationPlatformReservation(temp->tile, TrackdirToExitdir(ReverseTrackdir(temp->GetVehicleTrackdir())), false);
    01402         }
    01403       }
    01404
    01405       bool build_rail = keep_rail && !IsStationTileBlocked(tile);
    01406
    01407       DoClearSquare(tile);
    01408       DeleteNewGRFInspectWindow(GSF_STATIONS, tile);
    01409       if (build_rail) MakeRailNormal(tile, owner, TrackToTrackBits(track), rt);
    01410
    01411       st->rect.AfterRemoveTile(st, tile);
    01412       AddTrackToSignalBuffer(tile, track, owner);
    01413       YapfNotifyTrackLayoutChange(tile, track);
    01414
    01415       DeallocateSpecFromStation(st, specindex);
    01416
    01417       affected_stations.Include(st);
    01418
    01419       if (v != NULL) {
    01420         /* Restore station reservation. */
    01421         if (IsRailStationTile(v->tile)) SetRailStationPlatformReservation(v->tile, TrackdirToExitdir(v->GetVehicleTrackdir()), true);
    01422         TryPathReserve(v, true, true);
    01423         for (; v->Next() != NULL; v = v->Next()) { }
    01424         if (IsRailStationTile(v->tile)) SetRailStationPlatformReservation(v->tile, TrackdirToExitdir(ReverseTrackdir(v->GetVehicleTrackdir())), true);
    01425       }
    01426     }
    01427   }
    01428
    01429   if (quantity == 0) return_cmd_error(STR_ERROR_THERE_IS_NO_STATION);
    01430
    01431   for (T **stp = affected_stations.Begin(); stp != affected_stations.End(); stp++) {
    01432     T *st = *stp;
    01433
    01434     /* now we need to make the "spanned" area of the railway station smaller
    01435      * if we deleted something at the edges.
    01436      * we also need to adjust train_tile. */
    01437     MakeRailStationAreaSmaller(st);
    01438     UpdateStationSignCoord(st);
    01439
    01440     /* if we deleted the whole station, delete the train facility. */
    01441     if (st->train_station.tile == INVALID_TILE) {
    01442       st->facilities &= ~FACIL_TRAIN;
    01443       SetWindowWidgetDirty(WC_STATION_VIEW, st->index, SVW_TRAINS);
    01444       st->UpdateVirtCoord();
    01445       DeleteStationIfEmpty(st);
    01446     }
    01447   }
    01448
    01449   total_cost.AddCost(quantity * removal_cost);
    01450   return total_cost;
    01451 }
    01452
    01464 CommandCost CmdRemoveFromRailStation(TileIndex start, DoCommandFlag flags, uint32 p1, uint32 p2, const char *text)
    01465 {
    01466   TileIndex end = p1 == 0 ? start : p1;
    01467   if (start >= MapSize() || end >= MapSize()) return CMD_ERROR;
    01468
    01469   TileArea ta(start, end);
    01470   SmallVector<Station *, 4> affected_stations;
    01471
    01472   CommandCost ret = RemoveFromRailBaseStation(ta, affected_stations, flags, _price[PR_CLEAR_STATION_RAIL], HasBit(p2, 0));
    01473   if (ret.Failed()) return ret;
    01474
    01475   /* Do all station specific functions here. */
    01476   for (Station **stp = affected_stations.Begin(); stp != affected_stations.End(); stp++) {
    01477     Station *st = *stp;
    01478
    01479     if (st->train_station.tile == INVALID_TILE) SetWindowWidgetDirty(WC_STATION_VIEW, st->index, SVW_TRAINS);
    01480     st->MarkTilesDirty(false);
    01481     st->RecomputeIndustriesNear();
    01482   }
    01483
    01484   /* Now apply the rail cost to the number that we deleted */
    01485   return ret;
    01486 }
    01487
    01499 CommandCost CmdRemoveFromRailWaypoint(TileIndex start, DoCommandFlag flags, uint32 p1, uint32 p2, const char *text)
    01500 {
    01501   TileIndex end = p1 == 0 ? start : p1;
    01502   if (start >= MapSize() || end >= MapSize()) return CMD_ERROR;
    01503
    01504   TileArea ta(start, end);
    01505   SmallVector<Waypoint *, 4> affected_stations;
    01506
    01507   return RemoveFromRailBaseStation(ta, affected_stations, flags, _price[PR_CLEAR_WAYPOINT_RAIL], HasBit(p2, 0));
    01508 }
    01509
    01510
    01518 template <class T>
    01519 CommandCost RemoveRailStation(T *st, DoCommandFlag flags)
    01520 {
    01521   /* Current company owns the station? */
    01522   if (_current_company != OWNER_WATER) {
    01523     CommandCost ret = CheckOwnership(st->owner);
    01524     if (ret.Failed()) return ret;
    01525   }
    01526
    01527   /* determine width and height of platforms */
    01528   TileArea ta = st->train_station;
    01529
    01530   assert(ta.w != 0 && ta.h != 0);
    01531
    01532   CommandCost cost(EXPENSES_CONSTRUCTION);
    01533   /* clear all areas of the station */
    01534   TILE_AREA_LOOP(tile, ta) {
    01535     /* only remove tiles that are actually train station tiles */
    01536     if (!st->TileBelongsToRailStation(tile)) continue;
    01537
    01538     CommandCost ret = EnsureNoVehicleOnGround(tile);
    01539     if (ret.Failed()) return ret;
    01540
    01541     cost.AddCost(_price[PR_CLEAR_STATION_RAIL]);
    01542     if (flags & DC_EXEC) {
    01543       /* read variables before the station tile is removed */
    01544       Track track = GetRailStationTrack(tile);
    01545       Owner owner = GetTileOwner(tile); // _current_company can be OWNER_WATER
    01546       Train *v = NULL;
    01547       if (HasStationReservation(tile)) {
    01548         v = GetTrainForReservation(tile, track);
    01549         if (v != NULL) FreeTrainTrackReservation(v);
    01550       }
    01551       DoClearSquare(tile);
    01552       DeleteNewGRFInspectWindow(GSF_STATIONS, tile);
    01553       AddTrackToSignalBuffer(tile, track, owner);
    01554       YapfNotifyTrackLayoutChange(tile, track);
    01555       if (v != NULL) TryPathReserve(v, true);
    01556     }
    01557   }
    01558
    01559   if (flags & DC_EXEC) {
    01560     st->rect.AfterRemoveRect(st, st->train_station);
    01561
    01562     st->train_station.Clear();
    01563
    01564     st->facilities &= ~FACIL_TRAIN;
    01565
    01566     free(st->speclist);
    01567     st->num_specs = 0;
    01568     st->speclist  = NULL;
    01569     st->cached_anim_triggers = 0;
    01570
    01571     SetWindowWidgetDirty(WC_STATION_VIEW, st->index, SVW_TRAINS);
    01572     st->UpdateVirtCoord();
    01573     DeleteStationIfEmpty(st);
    01574   }
    01575
    01576   return cost;
    01577 }
    01578
    01585 static CommandCost RemoveRailStation(TileIndex tile, DoCommandFlag flags)
    01586 {
    01587   /* if there is flooding, remove platforms tile by tile */
    01588   if (_current_company == OWNER_WATER) {
    01589     return DoCommand(tile, 0, 0, DC_EXEC, CMD_REMOVE_FROM_RAIL_STATION);
    01590   }
    01591
    01592   Station *st = Station::GetByTile(tile);
    01593   CommandCost cost = RemoveRailStation(st, flags);
    01594
    01595   if (flags & DC_EXEC) st->RecomputeIndustriesNear();
    01596
    01597   return cost;
    01598 }
    01599
    01606 static CommandCost RemoveRailWaypoint(TileIndex tile, DoCommandFlag flags)
    01607 {
    01608   /* if there is flooding, remove waypoints tile by tile */
    01609   if (_current_company == OWNER_WATER) {
    01610     return DoCommand(tile, 0, 0, DC_EXEC, CMD_REMOVE_FROM_RAIL_WAYPOINT);
    01611   }
    01612
    01613   return RemoveRailStation(Waypoint::GetByTile(tile), flags);
    01614 }
    01615
    01616
    01622 static RoadStop **FindRoadStopSpot(bool truck_station, Station *st)
    01623 {
    01624   RoadStop **primary_stop = (truck_station) ? &st->truck_stops : &st->bus_stops;
    01625
    01626   if (*primary_stop == NULL) {
    01627     /* we have no roadstop of the type yet, so write a "primary stop" */
    01628     return primary_stop;
    01629   } else {
    01630     /* there are stops already, so append to the end of the list */
    01631     RoadStop *stop = *primary_stop;
    01632     while (stop->next != NULL) stop = stop->next;
    01633     return &stop->next;
    01634   }
    01635 }
    01636
    01637 static CommandCost RemoveRoadStop(TileIndex tile, DoCommandFlag flags);
    01638
    01648 static CommandCost FindJoiningRoadStop(StationID existing_stop, StationID station_to_join, bool adjacent, TileArea ta, Station **st)
    01649 {
    01650   return FindJoiningBaseStation<Station, STR_ERROR_MUST_REMOVE_ROAD_STOP_FIRST>(existing_stop, station_to_join, adjacent, ta, st);
    01651 }
    01652
    01668 CommandCost CmdBuildRoadStop(TileIndex tile, DoCommandFlag flags, uint32 p1, uint32 p2, const char *text)
    01669 {
    01670   bool type = HasBit(p2, 0);
    01671   bool is_drive_through = HasBit(p2, 1);
    01672   RoadTypes rts = Extract<RoadTypes, 2, 2>(p2);
    01673   StationID station_to_join = GB(p2, 16, 16);
    01674   bool reuse = (station_to_join != NEW_STATION);
    01675   if (!reuse) station_to_join = INVALID_STATION;
    01676   bool distant_join = (station_to_join != INVALID_STATION);
    01677
    01678   uint8 width = (uint8)GB(p1, 0, 8);
    01679   uint8 lenght = (uint8)GB(p1, 8, 8);
    01680
    01681   /* Check if the requested road stop is too big */
    01682   if (width > _settings_game.station.station_spread || lenght > _settings_game.station.station_spread) return_cmd_error(STR_ERROR_STATION_TOO_SPREAD_OUT);
    01683   /* Check for incorrect width / lenght. */
    01684   if (width == 0 || lenght == 0) return CMD_ERROR;
    01685   /* Check if the first tile and the last tile are valid */
    01686   if (!IsValidTile(tile) || TileAddWrap(tile, width - 1, lenght - 1) == INVALID_TILE) return CMD_ERROR;
    01687
    01688   TileArea roadstop_area(tile, width, lenght);
    01689
    01690   if (distant_join && (!_settings_game.station.distant_join_stations || !Station::IsValidID(station_to_join))) return CMD_ERROR;
    01691
    01692   if (!HasExactlyOneBit(rts) || !HasRoadTypesAvail(_current_company, rts)) return CMD_ERROR;
    01693
    01694   /* Trams only have drive through stops */
    01695   if (!is_drive_through && HasBit(rts, ROADTYPE_TRAM)) return CMD_ERROR;
    01696
    01697   DiagDirection ddir = Extract<DiagDirection, 6, 2>(p2);
    01698
    01699   /* Safeguard the parameters. */
    01700   if (!IsValidDiagDirection(ddir)) return CMD_ERROR;
    01701   /* If it is a drive-through stop, check for valid axis. */
    01702   if (is_drive_through && !IsValidAxis((Axis)ddir)) return CMD_ERROR;
    01703
    01704   CommandCost ret = CheckIfAuthorityAllowsNewStation(tile, flags);
    01705   if (ret.Failed()) return ret;
    01706
    01707   /* Total road stop cost. */
    01708   CommandCost cost(EXPENSES_CONSTRUCTION, roadstop_area.w * roadstop_area.h * _price[type ? PR_BUILD_STATION_TRUCK : PR_BUILD_STATION_BUS]);
    01709   StationID est = INVALID_STATION;
    01710   ret = CheckFlatLandRoadStop(roadstop_area, flags, is_drive_through ? 5 << ddir : 1 << ddir, is_drive_through, type, DiagDirToAxis(ddir), &est, rts);
    01711   if (ret.Failed()) return ret;
    01712   cost.AddCost(ret);
    01713
    01714   Station *st = NULL;
    01715   ret = FindJoiningRoadStop(est, station_to_join, HasBit(p2, 5), roadstop_area, &st);
    01716   if (ret.Failed()) return ret;
    01717
    01718   /* Find a deleted station close to us */
    01719   if (st == NULL && reuse) st = GetClosestDeletedStation(tile);
    01720
    01721   /* Check if this number of road stops can be allocated. */
    01722   if (!RoadStop::CanAllocateItem(roadstop_area.w * roadstop_area.h)) return_cmd_error(type ? STR_ERROR_TOO_MANY_TRUCK_STOPS : STR_ERROR_TOO_MANY_BUS_STOPS);
    01723
    01724   if (st != NULL) {
    01725     if (st->owner != _current_company) {
    01726       return_cmd_error(STR_ERROR_TOO_CLOSE_TO_ANOTHER_STATION);
    01727     }
    01728
    01729     CommandCost ret = st->rect.BeforeAddRect(roadstop_area.tile, roadstop_area.w, roadstop_area.h, StationRect::ADD_TEST);
    01730     if (ret.Failed()) return ret;
    01731   } else {
    01732     /* allocate and initialize new station */
    01733     if (!Station::CanAllocateItem()) return_cmd_error(STR_ERROR_TOO_MANY_STATIONS_LOADING);
    01734
    01735     if (flags & DC_EXEC) {
    01736       st = new Station(tile);
    01737
    01738       st->town = ClosestTownFromTile(tile, UINT_MAX);
    01739       st->string_id = GenerateStationName(st, tile, STATIONNAMING_ROAD);
    01740
    01741       if (Company::IsValidID(_current_company)) {
    01742         SetBit(st->town->have_ratings, _current_company);
    01743       }
    01744     }
    01745   }
    01746
    01747   if (flags & DC_EXEC) {
    01748     /* Check every tile in the area. */
    01749     TILE_AREA_LOOP(cur_tile, roadstop_area) {
    01750       RoadTypes cur_rts = GetRoadTypes(cur_tile);
    01751       Owner road_owner = HasBit(cur_rts, ROADTYPE_ROAD) ? GetRoadOwner(cur_tile, ROADTYPE_ROAD) : _current_company;
    01752       Owner tram_owner = HasBit(cur_rts, ROADTYPE_TRAM) ? GetRoadOwner(cur_tile, ROADTYPE_TRAM) : _current_company;
    01753
    01754       if (IsTileType(cur_tile, MP_STATION) && IsRoadStop(cur_tile)) {
    01755         RemoveRoadStop(cur_tile, flags);
    01756       }
    01757
    01758       RoadStop *road_stop = new RoadStop(cur_tile);
    01759       /* Insert into linked list of RoadStops. */
    01760       RoadStop **currstop = FindRoadStopSpot(type, st);
    01761       *currstop = road_stop;
    01762
    01763       if (type) {
    01764         st->truck_station.Add(cur_tile);
    01765       } else {
    01766         st->bus_station.Add(cur_tile);
    01767       }
    01768
    01769       /* Initialize an empty station. */
    01770       st->AddFacility((type) ? FACIL_TRUCK_STOP : FACIL_BUS_STOP, cur_tile);
    01771
    01772       st->rect.BeforeAddTile(cur_tile, StationRect::ADD_TRY);
    01773
    01774       RoadStopType rs_type = type ? ROADSTOP_TRUCK : ROADSTOP_BUS;
    01775       if (is_drive_through) {
    01776         MakeDriveThroughRoadStop(cur_tile, st->owner, road_owner, tram_owner, st->index, rs_type, rts | cur_rts, DiagDirToAxis(ddir));
    01777         road_stop->MakeDriveThrough();
    01778       } else {
    01779         MakeRoadStop(cur_tile, st->owner, st->index, rs_type, rts, ddir);
    01780       }
    01781
    01782       MarkTileDirtyByTile(cur_tile);
    01783     }
    01784   }
    01785
    01786   if (st != NULL) {
    01787     st->UpdateVirtCoord();
    01788     UpdateStationAcceptance(st, false);
    01789     st->RecomputeIndustriesNear();
    01790     InvalidateWindowData(WC_SELECT_STATION, 0, 0);
    01791     InvalidateWindowData(WC_STATION_LIST, st->owner, 0);
    01792     SetWindowWidgetDirty(WC_STATION_VIEW, st->index, SVW_ROADVEHS);
    01793   }
    01794   return cost;
    01795 }
    01796
    01797
    01798 static Vehicle *ClearRoadStopStatusEnum(Vehicle *v, void *)
    01799 {
    01800   if (v->type == VEH_ROAD) {
    01801     /* Okay... we are a road vehicle on a drive through road stop.
    01802      * But that road stop has just been removed, so we need to make
    01803      * sure we are in a valid state... however, vehicles can also
    01804      * turn on road stop tiles, so only clear the 'road stop' state
    01805      * bits and only when the state was 'in road stop', otherwise
    01806      * we'll end up clearing the turn around bits. */
    01807     RoadVehicle *rv = RoadVehicle::From(v);
    01808     if (HasBit(rv->state, RVS_IN_DT_ROAD_STOP)) rv->state &= RVSB_ROAD_STOP_TRACKDIR_MASK;
    01809   }
    01810
    01811   return NULL;
    01812 }
    01813
    01814
    01821 static CommandCost RemoveRoadStop(TileIndex tile, DoCommandFlag flags)
    01822 {
    01823   Station *st = Station::GetByTile(tile);
    01824
    01825   if (_current_company != OWNER_WATER) {
    01826     CommandCost ret = CheckOwnership(st->owner);
    01827     if (ret.Failed()) return ret;
    01828   }
    01829
    01830   bool is_truck = IsTruckStop(tile);
    01831
    01832   RoadStop **primary_stop;
    01833   RoadStop *cur_stop;
    01834   if (is_truck) { // truck stop
    01835     primary_stop = &st->truck_stops;
    01836     cur_stop = RoadStop::GetByTile(tile, ROADSTOP_TRUCK);
    01837   } else {
    01838     primary_stop = &st->bus_stops;
    01839     cur_stop = RoadStop::GetByTile(tile, ROADSTOP_BUS);
    01840   }
    01841
    01842   assert(cur_stop != NULL);
    01843
    01844   /* don't do the check for drive-through road stops when company bankrupts */
    01845   if (IsDriveThroughStopTile(tile) && (flags & DC_BANKRUPT)) {
    01846     /* remove the 'going through road stop' status from all vehicles on that tile */
    01847     if (flags & DC_EXEC) FindVehicleOnPos(tile, NULL, &ClearRoadStopStatusEnum);
    01848   } else {
    01849     CommandCost ret = EnsureNoVehicleOnGround(tile);
    01850     if (ret.Failed()) return ret;
    01851   }
    01852
    01853   if (flags & DC_EXEC) {
    01854     if (*primary_stop == cur_stop) {
    01855       /* removed the first stop in the list */
    01856       *primary_stop = cur_stop->next;
    01857       /* removed the only stop? */
    01858       if (*primary_stop == NULL) {
    01859         st->facilities &= (is_truck ? ~FACIL_TRUCK_STOP : ~FACIL_BUS_STOP);
    01860       }
    01861     } else {
    01862       /* tell the predecessor in the list to skip this stop */
    01863       RoadStop *pred = *primary_stop;
    01864       while (pred->next != cur_stop) pred = pred->next;
    01865       pred->next = cur_stop->next;
    01866     }
    01867
    01868     if (IsDriveThroughStopTile(tile)) {
    01869       /* Clears the tile for us */
    01870       cur_stop->ClearDriveThrough();
    01871     } else {
    01872       DoClearSquare(tile);
    01873     }
    01874
    01875     SetWindowWidgetDirty(WC_STATION_VIEW, st->index, SVW_ROADVEHS);
    01876     delete cur_stop;
    01877
    01878     /* Make sure no vehicle is going to the old roadstop */
    01879     RoadVehicle *v;
    01880     FOR_ALL_ROADVEHICLES(v) {
    01881       if (v->First() == v && v->current_order.IsType(OT_GOTO_STATION) &&
    01882           v->dest_tile == tile) {
    01883         v->dest_tile = v->GetOrderStationLocation(st->index);
    01884       }
    01885     }
    01886
    01887     st->rect.AfterRemoveTile(st, tile);
    01888
    01889     st->UpdateVirtCoord();
    01890     st->RecomputeIndustriesNear();
    01891     DeleteStationIfEmpty(st);
    01892
    01893     /* Update the tile area of the truck/bus stop */
    01894     if (is_truck) {
    01895       st->truck_station.Clear();
    01896       for (const RoadStop *rs = st->truck_stops; rs != NULL; rs = rs->next) st->truck_station.Add(rs->xy);
    01897     } else {
    01898       st->bus_station.Clear();
    01899       for (const RoadStop *rs = st->bus_stops; rs != NULL; rs = rs->next) st->bus_station.Add(rs->xy);
    01900     }
    01901   }
    01902
    01903   return CommandCost(EXPENSES_CONSTRUCTION, _price[is_truck ? PR_CLEAR_STATION_TRUCK : PR_CLEAR_STATION_BUS]);
    01904 }
    01905
    01916 CommandCost CmdRemoveRoadStop(TileIndex tile, DoCommandFlag flags, uint32 p1, uint32 p2, const char *text)
    01917 {
    01918   uint8 width = (uint8)GB(p1, 0, 8);
    01919   uint8 height = (uint8)GB(p1, 8, 8);
    01920
    01921   /* Check for incorrect width / height. */
    01922   if (width == 0 || height == 0) return CMD_ERROR;
    01923   /* Check if the first tile and the last tile are valid */
    01924   if (!IsValidTile(tile) || TileAddWrap(tile, width - 1, height - 1) == INVALID_TILE) return CMD_ERROR;
    01925
    01926   TileArea roadstop_area(tile, width, height);
    01927
    01928   int quantity = 0;
    01929   CommandCost cost(EXPENSES_CONSTRUCTION);
    01930   TILE_AREA_LOOP(cur_tile, roadstop_area) {
    01931     /* Make sure the specified tile is a road stop of the correct type */
    01932     if (!IsTileType(cur_tile, MP_STATION) || !IsRoadStop(cur_tile) || (uint32)GetRoadStopType(cur_tile) != GB(p2, 0, 1)) continue;
    01933
    01934     /* Save the stop info before it is removed */
    01935     bool is_drive_through = IsDriveThroughStopTile(cur_tile);
    01936     RoadTypes rts = GetRoadTypes(cur_tile);
    01937     RoadBits road_bits = IsDriveThroughStopTile(cur_tile) ?
    01938         ((GetRoadStopDir(cur_tile) == DIAGDIR_NE) ? ROAD_X : ROAD_Y) :
    01939         DiagDirToRoadBits(GetRoadStopDir(cur_tile));
    01940
    01941     Owner road_owner = GetRoadOwner(cur_tile, ROADTYPE_ROAD);
    01942     Owner tram_owner = GetRoadOwner(cur_tile, ROADTYPE_TRAM);
    01943     CommandCost ret = RemoveRoadStop(cur_tile, flags);
    01944     if (ret.Failed()) return ret;
    01945     cost.AddCost(ret);
    01946
    01947     quantity++;
    01948     /* If the stop was a drive-through stop replace the road */
    01949     if ((flags & DC_EXEC) && is_drive_through) {
    01950       MakeRoadNormal(cur_tile, road_bits, rts, ClosestTownFromTile(cur_tile, UINT_MAX)->index,
    01951           road_owner, tram_owner);
    01952     }
    01953   }
    01954
    01955   if (quantity == 0) return_cmd_error(STR_ERROR_THERE_IS_NO_STATION);
    01956
    01957   return cost;
    01958 }
    01959
    01967 static uint GetMinimalAirportDistanceToTile(const AirportSpec *as, TileIndex town_tile, TileIndex airport_tile)
    01968 {
    01969   uint ttx = TileX(town_tile); // X, Y of town
    01970   uint tty = TileY(town_tile);
    01971
    01972   uint atx = TileX(airport_tile); // X, Y of northern airport corner
    01973   uint aty = TileY(airport_tile);
    01974
    01975   uint btx = TileX(airport_tile) + as->size_x - 1; // X, Y of southern corner
    01976   uint bty = TileY(airport_tile) + as->size_y - 1;
    01977
    01978   /* if ttx < atx, dx = atx - ttx
    01979    * if atx <= ttx <= btx, dx = 0
    01980    * else, dx = ttx - btx (similiar for dy) */
    01981   uint dx = ttx < atx ? atx - ttx : (ttx <= btx ? 0 : ttx - btx);
    01982   uint dy = tty < aty ? aty - tty : (tty <= bty ? 0 : tty - bty);
    01983
    01984   return dx + dy;
    01985 }
    01986
    01996 uint8 GetAirportNoiseLevelForTown(const AirportSpec *as, TileIndex town_tile, TileIndex tile)
    01997 {
    01998   /* 0 cannot be accounted, and 1 is the lowest that can be reduced from town.
    01999    * So no need to go any further*/
    02000   if (as->noise_level < 2) return as->noise_level;
    02001
    02002   uint distance = GetMinimalAirportDistanceToTile(as, town_tile, tile);
    02003
    02004   /* The steps for measuring noise reduction are based on the "magical" (and arbitrary) 8 base distance
    02005    * adding the town_council_tolerance 4 times, as a way to graduate, depending of the tolerance.
    02006    * Basically, it says that the less tolerant a town is, the bigger the distance before
    02007    * an actual decrease can be granted */
    02008   uint8 town_tolerance_distance = 8 + (_settings_game.difficulty.town_council_tolerance * 4);
    02009
    02010   /* now, we want to have the distance segmented using the distance judged bareable by town
    02011    * This will give us the coefficient of reduction the distance provides. */
    02012   uint noise_reduction = distance / town_tolerance_distance;
    02013
    02014   /* If the noise reduction equals the airport noise itself, don't give it for free.
    02015    * Otherwise, simply reduce the airport's level. */
    02016   return noise_reduction >= as->noise_level ? 1 : as->noise_level - noise_reduction;
    02017 }
    02018
    02026 Town *AirportGetNearestTown(const AirportSpec *as, TileIndex airport_tile)
    02027 {
    02028   Town *t, *nearest = NULL;
    02029   uint add = as->size_x + as->size_y - 2; // GetMinimalAirportDistanceToTile can differ from DistanceManhattan by this much
    02030   uint mindist = UINT_MAX - add; // prevent overflow
    02031   FOR_ALL_TOWNS(t) {
    02032     if (DistanceManhattan(t->xy, airport_tile) < mindist + add) { // avoid calling GetMinimalAirportDistanceToTile too often
    02033       uint dist = GetMinimalAirportDistanceToTile(as, t->xy, airport_tile);
    02034       if (dist < mindist) {
    02035         nearest = t;
    02036         mindist = dist;
    02037       }
    02038     }
    02039   }
    02040
    02041   return nearest;
    02042 }
    02043
    02044
    02046 void UpdateAirportsNoise()
    02047 {
    02048   Town *t;
    02049   const Station *st;
    02050
    02051   FOR_ALL_TOWNS(t) t->noise_reached = 0;
    02052
    02053   FOR_ALL_STATIONS(st) {
    02054     if (st->airport.tile != INVALID_TILE) {
    02055       const AirportSpec *as = st->airport.GetSpec();
    02056       Town *nearest = AirportGetNearestTown(as, st->airport.tile);
    02057       nearest->noise_reached += GetAirportNoiseLevelForTown(as, nearest->xy, st->airport.tile);
    02058     }
    02059   }
    02060 }
    02061
    02075 CommandCost CmdBuildAirport(TileIndex tile, DoCommandFlag flags, uint32 p1, uint32 p2, const char *text)
    02076 {
    02077   StationID station_to_join = GB(p2, 16, 16);
    02078   bool reuse = (station_to_join != NEW_STATION);
    02079   if (!reuse) station_to_join = INVALID_STATION;
    02080   bool distant_join = (station_to_join != INVALID_STATION);
    02081   byte airport_type = GB(p1, 0, 8);
    02082   byte layout = GB(p1, 8, 8);
    02083
    02084   if (distant_join && (!_settings_game.station.distant_join_stations || !Station::IsValidID(station_to_join))) return CMD_ERROR;
    02085
    02086   if (airport_type >= NUM_AIRPORTS) return CMD_ERROR;
    02087
    02088   CommandCost ret = CheckIfAuthorityAllowsNewStation(tile, flags);
    02089   if (ret.Failed()) return ret;
    02090
    02091   /* Check if a valid, buildable airport was chosen for construction */
    02092   const AirportSpec *as = AirportSpec::Get(airport_type);
    02093   if (!as->IsAvailable() || layout >= as->num_table) return CMD_ERROR;
    02094
    02095   Direction rotation = as->rotation[layout];
    02096   Town *t = ClosestTownFromTile(tile, UINT_MAX);
    02097   int w = as->size_x;
    02098   int h = as->size_y;
    02099   if (rotation == DIR_E || rotation == DIR_W) Swap(w, h);
    02100
    02101   if (w > _settings_game.station.station_spread || h > _settings_game.station.station_spread) {
    02102     return_cmd_error(STR_ERROR_STATION_TOO_SPREAD_OUT);
    02103   }
    02104
    02105   CommandCost cost = CheckFlatLand(TileArea(tile, w, h), flags);
    02106   if (cost.Failed()) return cost;
    02107
    02108   /* The noise level is the noise from the airport and reduce it to account for the distance to the town center. */
    02109   Town *nearest = AirportGetNearestTown(as, tile);
    02110   uint newnoise_level = GetAirportNoiseLevelForTown(as, nearest->xy, tile);
    02111
    02112   /* Check if local auth would allow a new airport */
    02113   StringID authority_refuse_message = STR_NULL;
    02114
    02115   if (_settings_game.economy.station_noise_level) {
    02116     /* do not allow to build a new airport if this raise the town noise over the maximum allowed by town */
    02117     if ((nearest->noise_reached + newnoise_level) > nearest->MaxTownNoise()) {
    02118       authority_refuse_message = STR_ERROR_LOCAL_AUTHORITY_REFUSES_NOISE;
    02119     }
    02120   } else {
    02121     uint num = 0;
    02122     const Station *st;
    02123     FOR_ALL_STATIONS(st) {
    02124       if (st->town == t && (st->facilities & FACIL_AIRPORT) && st->airport.type != AT_OILRIG) num++;
    02125     }
    02126     if (num >= 2) {
    02127       authority_refuse_message = STR_ERROR_LOCAL_AUTHORITY_REFUSES_AIRPORT;
    02128     }
    02129   }
    02130
    02131   if (authority_refuse_message != STR_NULL) {
    02132     SetDParam(0, t->index);
    02133     return_cmd_error(authority_refuse_message);
    02134   }
    02135
    02136   Station *st = NULL;
    02137   ret = FindJoiningStation(INVALID_STATION, station_to_join, HasBit(p2, 0), TileArea(tile, w, h), &st);
    02138   if (ret.Failed()) return ret;
    02139
    02140   /* Distant join */
    02141   if (st == NULL && distant_join) st = Station::GetIfValid(station_to_join);
    02142
    02143   /* Find a deleted station close to us */
    02144   if (st == NULL && reuse) st = GetClosestDeletedStation(tile);
    02145
    02146   if (st != NULL) {
    02147     if (st->owner != _current_company) {
    02148       return_cmd_error(STR_ERROR_TOO_CLOSE_TO_ANOTHER_STATION);
    02149     }
    02150
    02151     CommandCost ret = st->rect.BeforeAddRect(tile, w, h, StationRect::ADD_TEST);
    02152     if (ret.Failed()) return ret;
    02153
    02154     if (st->airport.tile != INVALID_TILE) {
    02155       return_cmd_error(STR_ERROR_TOO_CLOSE_TO_ANOTHER_AIRPORT);
    02156     }
    02157   } else {
    02158     /* allocate and initialize new station */
    02159     if (!Station::CanAllocateItem()) return_cmd_error(STR_ERROR_TOO_MANY_STATIONS_LOADING);
    02160
    02161     if (flags & DC_EXEC) {
    02162       st = new Station(tile);
    02163
    02164       st->town = t;
    02165       st->string_id = GenerateStationName(st, tile, !(GetAirport(airport_type)->flags & AirportFTAClass::AIRPLANES) ? STATIONNAMING_HELIPORT : STATIONNAMING_AIRPORT);
    02166
    02167       if (Company::IsValidID(_current_company)) {
    02168         SetBit(st->town->have_ratings, _current_company);
    02169       }
    02170     }
    02171   }
    02172
    02173   const AirportTileTable *it = as->table[layout];
    02174   do {
    02175     cost.AddCost(_price[PR_BUILD_STATION_AIRPORT]);
    02176   } while ((++it)->ti.x != -0x80);
    02177
    02178   if (flags & DC_EXEC) {
    02179     /* Always add the noise, so there will be no need to recalculate when option toggles */
    02180     nearest->noise_reached += newnoise_level;
    02181
    02182     st->AddFacility(FACIL_AIRPORT, tile);
    02183     st->airport.type = airport_type;
    02184     st->airport.layout = layout;
    02185     st->airport.flags = 0;
    02186     st->airport.rotation = rotation;
    02187
    02188     st->rect.BeforeAddRect(tile, w, h, StationRect::ADD_TRY);
    02189
    02190     it = as->table[layout];
    02191     do {
    02192       TileIndex cur_tile = tile + ToTileIndexDiff(it->ti);
    02193       MakeAirport(cur_tile, st->owner, st->index, it->gfx, WATER_CLASS_INVALID);
    02194       SetStationTileRandomBits(cur_tile, GB(Random(), 0, 4));
    02195       st->airport.Add(cur_tile);
    02196
    02197       if (AirportTileSpec::Get(GetTranslatedAirportTileID(it->gfx))->animation.status != ANIM_STATUS_NO_ANIMATION) AddAnimatedTile(cur_tile);
    02198     } while ((++it)->ti.x != -0x80);
    02199
    02200     /* Only call the animation trigger after all tiles have been built */
    02201     it = as->table[layout];
    02202     do {
    02203       TileIndex cur_tile = tile + ToTileIndexDiff(it->ti);
    02204       AirportTileAnimationTrigger(st, cur_tile, AAT_BUILT);
    02205     } while ((++it)->ti.x != -0x80);
    02206
    02207     UpdateAirplanesOnNewStation(st);
    02208
    02209     st->UpdateVirtCoord();
    02210     UpdateStationAcceptance(st, false);
    02211     st->RecomputeIndustriesNear();
    02212     InvalidateWindowData(WC_SELECT_STATION, 0, 0);
    02213     InvalidateWindowData(WC_STATION_LIST, st->owner, 0);
    02214     SetWindowWidgetDirty(WC_STATION_VIEW, st->index, SVW_PLANES);
    02215
    02216     if (_settings_game.economy.station_noise_level) {
    02217       SetWindowDirty(WC_TOWN_VIEW, st->town->index);
    02218     }
    02219   }
    02220
    02221   return cost;
    02222 }
    02223
    02230 static CommandCost RemoveAirport(TileIndex tile, DoCommandFlag flags)
    02231 {
    02232   Station *st = Station::GetByTile(tile);
    02233
    02234   if (_current_company != OWNER_WATER) {
    02235     CommandCost ret = CheckOwnership(st->owner);
    02236     if (ret.Failed()) return ret;
    02237   }
    02238
    02239   tile = st->airport.tile;
    02240
    02241   CommandCost cost(EXPENSES_CONSTRUCTION);
    02242
    02243   const Aircraft *a;
    02244   FOR_ALL_AIRCRAFT(a) {
    02245     if (!a->IsNormalAircraft()) continue;
    02246     if (a->targetairport == st->index && a->state != FLYING) return CMD_ERROR;
    02247   }
    02248
    02249   TILE_AREA_LOOP(tile_cur, st->airport) {
    02250     if (!st->TileBelongsToAirport(tile_cur)) continue;
    02251
    02252     CommandCost ret = EnsureNoVehicleOnGround(tile_cur);
    02253     if (ret.Failed()) return ret;
    02254
    02255     cost.AddCost(_price[PR_CLEAR_STATION_AIRPORT]);
    02256
    02257     if (flags & DC_EXEC) {
    02258       if (IsHangarTile(tile_cur)) OrderBackup::Reset(tile_cur, false);
    02259       DeleteAnimatedTile(tile_cur);
    02260       DoClearSquare(tile_cur);
    02261       DeleteNewGRFInspectWindow(GSF_AIRPORTTILES, tile_cur);
    02262     }
    02263   }
    02264
    02265   if (flags & DC_EXEC) {
    02266     const AirportSpec *as = st->airport.GetSpec();
    02267     for (uint i = 0; i < st->airport.GetNumHangars(); ++i) {
    02268       DeleteWindowById(
    02269         WC_VEHICLE_DEPOT, st->airport.GetHangarTile(i)
    02270       );
    02271     }
    02272
    02273     /* The noise level is the noise from the airport and reduce it to account for the distance to the town center.
    02274      * And as for construction, always remove it, even if the setting is not set, in order to avoid the
    02275      * need of recalculation */
    02276     Town *nearest = AirportGetNearestTown(as, tile);
    02277     nearest->noise_reached -= GetAirportNoiseLevelForTown(as, nearest->xy, tile);
    02278
    02279     st->rect.AfterRemoveRect(st, st->airport);
    02280
    02281     st->airport.Clear();
    02282     st->facilities &= ~FACIL_AIRPORT;
    02283
    02284     SetWindowWidgetDirty(WC_STATION_VIEW, st->index, SVW_PLANES);
    02285
    02286     if (_settings_game.economy.station_noise_level) {
    02287       SetWindowDirty(WC_TOWN_VIEW, st->town->index);
    02288     }
    02289
    02290     st->UpdateVirtCoord();
    02291     st->RecomputeIndustriesNear();
    02292     DeleteStationIfEmpty(st);
    02293     DeleteNewGRFInspectWindow(GSF_AIRPORTS, st->index);
    02294   }
    02295
    02296   return cost;
    02297 }
    02298
    02305 bool HasStationInUse(StationID station, bool include_company, CompanyID company)
    02306 {
    02307   const Vehicle *v;
    02308   FOR_ALL_VEHICLES(v) {
    02309     if ((v->owner == company) == include_company) {
    02310       const Order *order;
    02311       FOR_VEHICLE_ORDERS(v, order) {
    02312         if ((order->IsType(OT_GOTO_STATION) || order->IsType(OT_GOTO_WAYPOINT)) && order->GetDestination() == station) {
    02313           return true;
    02314         }
    02315       }
    02316     }
    02317   }
    02318   return false;
    02319 }
    02320
    02321 static const TileIndexDiffC _dock_tileoffs_chkaround[] = {
    02322   {-1,  0},
    02323   { 0,  0},
    02324   { 0,  0},
    02325   { 0, -1}
    02326 };
    02327 static const byte _dock_w_chk[4] = { 2, 1, 2, 1 };
    02328 static const byte _dock_h_chk[4] = { 1, 2, 1, 2 };
    02329
    02339 CommandCost CmdBuildDock(TileIndex tile, DoCommandFlag flags, uint32 p1, uint32 p2, const char *text)
    02340 {
    02341   StationID station_to_join = GB(p2, 16, 16);
    02342   bool reuse = (station_to_join != NEW_STATION);
    02343   if (!reuse) station_to_join = INVALID_STATION;
    02344   bool distant_join = (station_to_join != INVALID_STATION);
    02345
    02346   if (distant_join && (!_settings_game.station.distant_join_stations || !Station::IsValidID(station_to_join))) return CMD_ERROR;
    02347
    02348   DiagDirection direction = GetInclinedSlopeDirection(GetTileSlope(tile, NULL));
    02349   if (direction == INVALID_DIAGDIR) return_cmd_error(STR_ERROR_SITE_UNSUITABLE);
    02350   direction = ReverseDiagDir(direction);
    02351
    02352   /* Docks cannot be placed on rapids */
    02353   if (HasTileWaterGround(tile)) return_cmd_error(STR_ERROR_SITE_UNSUITABLE);
    02354
    02355   CommandCost ret = CheckIfAuthorityAllowsNewStation(tile, flags);
    02356   if (ret.Failed()) return ret;
    02357
    02358   if (MayHaveBridgeAbove(tile) && IsBridgeAbove(tile)) return_cmd_error(STR_ERROR_MUST_DEMOLISH_BRIDGE_FIRST);
    02359
    02360   ret = DoCommand(tile, 0, 0, flags, CMD_LANDSCAPE_CLEAR);
    02361   if (ret.Failed()) return ret;
    02362
    02363   TileIndex tile_cur = tile + TileOffsByDiagDir(direction);
    02364
    02365   if (!IsTileType(tile_cur, MP_WATER) || GetTileSlope(tile_cur, NULL) != SLOPE_FLAT) {
    02366     return_cmd_error(STR_ERROR_SITE_UNSUITABLE);
    02367   }
    02368
    02369   if (MayHaveBridgeAbove(tile_cur) && IsBridgeAbove(tile_cur)) return_cmd_error(STR_ERROR_MUST_DEMOLISH_BRIDGE_FIRST);
    02370
    02371   /* Get the water class of the water tile before it is cleared.*/
    02372   WaterClass wc = GetWaterClass(tile_cur);
    02373
    02374   ret = DoCommand(tile_cur, 0, 0, flags, CMD_LANDSCAPE_CLEAR);
    02375   if (ret.Failed()) return ret;
    02376
    02377   tile_cur += TileOffsByDiagDir(direction);
    02378   if (!IsTileType(tile_cur, MP_WATER) || GetTileSlope(tile_cur, NULL) != SLOPE_FLAT) {
    02379     return_cmd_error(STR_ERROR_SITE_UNSUITABLE);
    02380   }
    02381
    02382   /* middle */
    02383   Station *st = NULL;
    02384   ret = FindJoiningStation(INVALID_STATION, station_to_join, HasBit(p1, 0),
    02385       TileArea(tile + ToTileIndexDiff(_dock_tileoffs_chkaround[direction]),
    02386           _dock_w_chk[direction], _dock_h_chk[direction]), &st);
    02387   if (ret.Failed()) return ret;
    02388
    02389   /* Distant join */
    02390   if (st == NULL && distant_join) st = Station::GetIfValid(station_to_join);
    02391
    02392   /* Find a deleted station close to us */
    02393   if (st == NULL && reuse) st = GetClosestDeletedStation(tile);
    02394
    02395   if (st != NULL) {
    02396     if (st->owner != _current_company) {
    02397       return_cmd_error(STR_ERROR_TOO_CLOSE_TO_ANOTHER_STATION);
    02398     }
    02399
    02400     CommandCost ret = st->rect.BeforeAddRect(
    02401         tile + ToTileIndexDiff(_dock_tileoffs_chkaround[direction]),
    02402         _dock_w_chk[direction], _dock_h_chk[direction], StationRect::ADD_TEST);
    02403     if (ret.Failed()) return ret;
    02404
    02405     if (st->dock_tile != INVALID_TILE) return_cmd_error(STR_ERROR_TOO_CLOSE_TO_ANOTHER_DOCK);
    02406   } else {
    02407     /* allocate and initialize new station */
    02408     if (!Station::CanAllocateItem()) return_cmd_error(STR_ERROR_TOO_MANY_STATIONS_LOADING);
    02409
    02410     if (flags & DC_EXEC) {
    02411       st = new Station(tile);
    02412
    02413       st->town = ClosestTownFromTile(tile, UINT_MAX);
    02414       st->string_id = GenerateStationName(st, tile, STATIONNAMING_DOCK);
    02415
    02416       if (Company::IsValidID(_current_company)) {
    02417         SetBit(st->town->have_ratings, _current_company);
    02418       }
    02419     }
    02420   }
    02421
    02422   if (flags & DC_EXEC) {
    02423     st->dock_tile = tile;
    02424     st->AddFacility(FACIL_DOCK, tile);
    02425
    02426     st->rect.BeforeAddRect(
    02427         tile + ToTileIndexDiff(_dock_tileoffs_chkaround[direction]),
    02428         _dock_w_chk[direction], _dock_h_chk[direction], StationRect::ADD_TRY);
    02429
    02430     MakeDock(tile, st->owner, st->index, direction, wc);
    02431
    02432     st->UpdateVirtCoord();
    02433     UpdateStationAcceptance(st, false);
    02434     st->RecomputeIndustriesNear();
    02435     InvalidateWindowData(WC_SELECT_STATION, 0, 0);
    02436     InvalidateWindowData(WC_STATION_LIST, st->owner, 0);
    02437     SetWindowWidgetDirty(WC_STATION_VIEW, st->index, SVW_SHIPS);
    02438   }
    02439
    02440   return CommandCost(EXPENSES_CONSTRUCTION, _price[PR_BUILD_STATION_DOCK]);
    02441 }
    02442
    02449 static CommandCost RemoveDock(TileIndex tile, DoCommandFlag flags)
    02450 {
    02451   Station *st = Station::GetByTile(tile);
    02452   CommandCost ret = CheckOwnership(st->owner);
    02453   if (ret.Failed()) return ret;
    02454
    02455   TileIndex tile1 = st->dock_tile;
    02456   TileIndex tile2 = tile1 + TileOffsByDiagDir(GetDockDirection(tile1));
    02457
    02458   ret = EnsureNoVehicleOnGround(tile1);
    02459   if (ret.Succeeded()) ret = EnsureNoVehicleOnGround(tile2);
    02460   if (ret.Failed()) return ret;
    02461
    02462   if (flags & DC_EXEC) {
    02463     DoClearSquare(tile1);
    02464     MarkTileDirtyByTile(tile1);
    02465     MakeWaterKeepingClass(tile2, st->owner);
    02466
    02467     st->rect.AfterRemoveTile(st, tile1);
    02468     st->rect.AfterRemoveTile(st, tile2);
    02469
    02470     st->dock_tile = INVALID_TILE;
    02471     st->facilities &= ~FACIL_DOCK;
    02472
    02473     SetWindowWidgetDirty(WC_STATION_VIEW, st->index, SVW_SHIPS);
    02474     st->UpdateVirtCoord();
    02475     st->RecomputeIndustriesNear();
    02476     DeleteStationIfEmpty(st);
    02477   }
    02478
    02479   return CommandCost(EXPENSES_CONSTRUCTION, _price[PR_CLEAR_STATION_DOCK]);
    02480 }
    02481
    02482 #include "table/station_land.h"
    02483
    02484 const DrawTileSprites *GetStationTileLayout(StationType st, byte gfx)
    02485 {
    02486   return &_station_display_datas[st][gfx];
    02487 }
    02488
    02489 static void DrawTile_Station(TileInfo *ti)
    02490 {
    02491   const DrawTileSprites *t = NULL;
    02492   RoadTypes roadtypes;
    02493   int32 total_offset;
    02494   int32 custom_ground_offset;
    02495   const RailtypeInfo *rti = NULL;
    02496   uint32 relocation = 0;
    02497   const BaseStation *st = NULL;
    02498   const StationSpec *statspec = NULL;
    02499
    02500   if (HasStationRail(ti->tile)) {
    02501     rti = GetRailTypeInfo(GetRailType(ti->tile));
    02502     roadtypes = ROADTYPES_NONE;
    02503     total_offset = rti->total_offset;
    02504     custom_ground_offset = rti->custom_ground_offset;
    02505
    02506     if (IsCustomStationSpecIndex(ti->tile)) {
    02507       /* look for customization */
    02508       st = BaseStation::GetByTile(ti->tile);
    02509       statspec = st->speclist[GetCustomStationSpecIndex(ti->tile)].spec;
    02510
    02511       if (statspec != NULL) {
    02512         uint tile = GetStationGfx(ti->tile);
    02513
    02514         relocation = GetCustomStationRelocation(statspec, st, ti->tile);
    02515
    02516         if (HasBit(statspec->callback_mask, CBM_STATION_SPRITE_LAYOUT)) {
    02517           uint16 callback = GetStationCallback(CBID_STATION_SPRITE_LAYOUT, 0, 0, statspec, st, ti->tile);
    02518           if (callback != CALLBACK_FAILED) tile = (callback & ~1) + GetRailStationAxis(ti->tile);
    02519         }
    02520
    02521         /* Ensure the chosen tile layout is valid for this custom station */
    02522         if (statspec->renderdata != NULL) {
    02523           t = &statspec->renderdata[tile < statspec->tiles ? tile : (uint)GetRailStationAxis(ti->tile)];
    02524         }
    02525       }
    02526     }
    02527   } else {
    02528     roadtypes = IsRoadStop(ti->tile) ? GetRoadTypes(ti->tile) : ROADTYPES_NONE;
    02529     total_offset = 0;
    02530     custom_ground_offset = 0;
    02531   }
    02532
    02533   if (IsAirport(ti->tile)) {
    02534     StationGfx gfx = GetAirportGfx(ti->tile);
    02535     if (gfx >= NEW_AIRPORTTILE_OFFSET) {
    02536       const AirportTileSpec *ats = AirportTileSpec::Get(gfx);
    02537       if (ats->grf_prop.spritegroup[0] != NULL && DrawNewAirportTile(ti, Station::GetByTile(ti->tile), gfx, ats)) {
    02538         return;
    02539       }
    02540       /* No sprite group (or no valid one) found, meaning no graphics associated.
    02541        * Use the substitute one instead */
    02542       assert(ats->grf_prop.subst_id != INVALID_AIRPORTTILE);
    02543       gfx = ats->grf_prop.subst_id;
    02544     }
    02545     switch (gfx) {
    02546       case APT_RADAR_GRASS_FENCE_SW:
    02547         t = &_station_display_datas_airport_radar_grass_fence_sw[GetAnimationFrame(ti->tile)];
    02548         break;
    02549       case APT_GRASS_FENCE_NE_FLAG:
    02550         t = &_station_display_datas_airport_flag_grass_fence_ne[GetAnimationFrame(ti->tile)];
    02551         break;
    02552       case APT_RADAR_FENCE_SW:
    02553         t = &_station_display_datas_airport_radar_fence_sw[GetAnimationFrame(ti->tile)];
    02554         break;
    02555       case APT_RADAR_FENCE_NE:
    02556         t = &_station_display_datas_airport_radar_fence_ne[GetAnimationFrame(ti->tile)];
    02557         break;
    02558       case APT_GRASS_FENCE_NE_FLAG_2:
    02559         t = &_station_display_datas_airport_flag_grass_fence_ne_2[GetAnimationFrame(ti->tile)];
    02560         break;
    02561     }
    02562   }
    02563
    02564   Owner owner = GetTileOwner(ti->tile);
    02565
    02566   PaletteID palette;
    02567   if (Company::IsValidID(owner)) {
    02568     palette = COMPANY_SPRITE_COLOUR(owner);
    02569   } else {
    02570     /* Some stations are not owner by a company, namely oil rigs */
    02571     palette = PALETTE_TO_GREY;
    02572   }
    02573
    02574   if (t == NULL || t->seq == NULL) t = GetStationTileLayout(GetStationType(ti->tile), GetStationGfx(ti->tile));
    02575
    02576   /* don't show foundation for docks */
    02577   if (ti->tileh != SLOPE_FLAT && !IsDock(ti->tile)) {
    02578     if (statspec != NULL && HasBit(statspec->flags, SSF_CUSTOM_FOUNDATIONS)) {
    02579       /* Station has custom foundations. */
    02580       SpriteID image = GetCustomStationFoundationRelocation(statspec, st, ti->tile);
    02581
    02582       if (HasBit(statspec->flags, SSF_EXTENDED_FOUNDATIONS)) {
    02583         /* Station provides extended foundations. */
    02584
    02585         static const uint8 foundation_parts[] = {
    02586           0, 0, 0, 0, // Invalid,  Invalid,   Invalid,   SLOPE_SW
    02587           0, 1, 2, 3, // Invalid,  SLOPE_EW,  SLOPE_SE,  SLOPE_WSE
    02588           0, 4, 5, 6, // Invalid,  SLOPE_NW,  SLOPE_NS,  SLOPE_NWS
    02589           7, 8, 9     // SLOPE_NE, SLOPE_ENW, SLOPE_SEN
    02590         };
    02591
    02592         AddSortableSpriteToDraw(image + foundation_parts[ti->tileh], PAL_NONE, ti->x, ti->y, 16, 16, 7, ti->z);
    02593       } else {
    02594         /* Draw simple foundations, built up from 8 possible foundation sprites. */
    02595
    02596         /* Each set bit represents one of the eight composite sprites to be drawn.
    02597          * 'Invalid' entries will not drawn but are included for completeness. */
    02598         static const uint8 composite_foundation_parts[] = {
    02599           /* Invalid  (00000000), Invalid   (11010001), Invalid   (11100100), SLOPE_SW  (11100000) */
    02600              0x00,                0xD1,                 0xE4,                 0xE0,
    02601           /* Invalid  (11001010), SLOPE_EW  (11001001), SLOPE_SE  (11000100), SLOPE_WSE (11000000) */
    02602              0xCA,                0xC9,                 0xC4,                 0xC0,
    02603           /* Invalid  (11010010), SLOPE_NW  (10010001), SLOPE_NS  (11100100), SLOPE_NWS (10100000) */
    02604              0xD2,                0x91,                 0xE4,                 0xA0,
    02605           /* SLOPE_NE (01001010), SLOPE_ENW (00001001), SLOPE_SEN (01000100) */
    02606              0x4A,                0x09,                 0x44
    02607         };
    02608
    02609         uint8 parts = composite_foundation_parts[ti->tileh];
    02610
    02611         /* If foundations continue beyond the tile's upper sides then
    02612          * mask out the last two pieces. */
    02613         uint z;
    02614         Slope slope = GetFoundationSlope(ti->tile, &z);
    02615         if (!HasFoundationNW(ti->tile, slope, z)) ClrBit(parts, 6);
    02616         if (!HasFoundationNE(ti->tile, slope, z)) ClrBit(parts, 7);
    02617
    02618         if (parts == 0) {
    02619           /* We always have to draw at least one sprite to make sure there is a boundingbox and a sprite with the
    02620            * correct offset for the childsprites.
    02621            * So, draw the (completely empty) sprite of the default foundations. */
    02622           goto draw_default_foundation;
    02623         }
    02624
    02625         StartSpriteCombine();
    02626         for (int i = 0; i < 8; i++) {
    02627           if (HasBit(parts, i)) {
    02628             AddSortableSpriteToDraw(image + i, PAL_NONE, ti->x, ti->y, 16, 16, 7, ti->z);
    02629           }
    02630         }
    02631         EndSpriteCombine();
    02632       }
    02633
    02634       OffsetGroundSprite(31, 1);
    02635       ti->z += ApplyFoundationToSlope(FOUNDATION_LEVELED, &ti->tileh);
    02636     } else {
    02637 draw_default_foundation:
    02638       DrawFoundation(ti, FOUNDATION_LEVELED);
    02639     }
    02640   }
    02641
    02642   if (IsBuoy(ti->tile) || IsDock(ti->tile) || (IsOilRig(ti->tile) && IsTileOnWater(ti->tile))) {
    02643     if (ti->tileh == SLOPE_FLAT) {
    02644       DrawWaterClassGround(ti);
    02645     } else {
    02646       assert(IsDock(ti->tile));
    02647       TileIndex water_tile = ti->tile + TileOffsByDiagDir(GetDockDirection(ti->tile));
    02648       WaterClass wc = GetWaterClass(water_tile);
    02649       if (wc == WATER_CLASS_SEA) {
    02650         DrawShoreTile(ti->tileh);
    02651       } else {
    02652         DrawClearLandTile(ti, 3);
    02653       }
    02654     }
    02655   } else {
    02656     SpriteID image = t->ground.sprite;
    02657     PaletteID pal  = t->ground.pal;
    02658     if (rti != NULL && rti->UsesOverlay() && (image == SPR_RAIL_TRACK_X || image == SPR_RAIL_TRACK_Y)) {
    02659       SpriteID ground = GetCustomRailSprite(rti, ti->tile, RTSG_GROUND);
    02660       DrawGroundSprite(SPR_FLAT_GRASS_TILE, PAL_NONE);
    02661       DrawGroundSprite(ground + (image == SPR_RAIL_TRACK_X ? RTO_X : RTO_Y), PAL_NONE);
    02662
    02663       if (_game_mode != GM_MENU && _settings_client.gui.show_track_reservation && HasStationReservation(ti->tile)) {
    02664         SpriteID overlay = GetCustomRailSprite(rti, ti->tile, RTSG_OVERLAY);
    02665         DrawGroundSprite(overlay + (image == SPR_RAIL_TRACK_X ? RTO_X : RTO_Y), PALETTE_CRASH);
    02666       }
    02667     } else {
    02668       if (HasBit(image, SPRITE_MODIFIER_CUSTOM_SPRITE)) {
    02669         image += GetCustomStationGroundRelocation(statspec, st, ti->tile);
    02670         image += custom_ground_offset;
    02671       } else {
    02672         image += total_offset;
    02673       }
    02674       DrawGroundSprite(image, GroundSpritePaletteTransform(image, pal, palette));
    02675
    02676       /* PBS debugging, draw reserved tracks darker */
    02677       if (_game_mode != GM_MENU && _settings_client.gui.show_track_reservation && HasStationRail(ti->tile) && HasStationReservation(ti->tile)) {
    02678         const RailtypeInfo *rti = GetRailTypeInfo(GetRailType(ti->tile));
    02679         DrawGroundSprite(GetRailStationAxis(ti->tile) == AXIS_X ? rti->base_sprites.single_x : rti->base_sprites.single_y, PALETTE_CRASH);
    02680       }
    02681     }
    02682   }
    02683
    02684   if (HasStationRail(ti->tile) && HasCatenaryDrawn(GetRailType(ti->tile)) && IsStationTileElectrifiable(ti->tile)) DrawCatenary(ti);
    02685
    02686   if (HasBit(roadtypes, ROADTYPE_TRAM)) {
    02687     Axis axis = GetRoadStopDir(ti->tile) == DIAGDIR_NE ? AXIS_X : AXIS_Y;
    02688     DrawGroundSprite((HasBit(roadtypes, ROADTYPE_ROAD) ? SPR_TRAMWAY_OVERLAY : SPR_TRAMWAY_TRAM) + (axis ^ 1), PAL_NONE);
    02689     DrawTramCatenary(ti, axis == AXIS_X ? ROAD_X : ROAD_Y);
    02690   }
    02691
    02692   if (IsRailWaypoint(ti->tile)) {
    02693     /* Don't offset the waypoint graphics; they're always the same. */
    02694     total_offset = 0;
    02695   }
    02696
    02697   DrawRailTileSeq(ti, t, TO_BUILDINGS, total_offset, relocation, palette);
    02698 }
    02699
    02700 void StationPickerDrawSprite(int x, int y, StationType st, RailType railtype, RoadType roadtype, int image)
    02701 {
    02702   int32 total_offset = 0;
    02703   PaletteID pal = COMPANY_SPRITE_COLOUR(_local_company);
    02704   const DrawTileSprites *t = GetStationTileLayout(st, image);
    02705   const RailtypeInfo *rti = NULL;
    02706
    02707   if (railtype != INVALID_RAILTYPE) {
    02708     rti = GetRailTypeInfo(railtype);
    02709     total_offset = rti->total_offset;
    02710   }
    02711
    02712   SpriteID img = t->ground.sprite;
    02713   if ((img == SPR_RAIL_TRACK_X || img == SPR_RAIL_TRACK_Y) && rti->UsesOverlay()) {
    02714     SpriteID ground = GetCustomRailSprite(rti, INVALID_TILE, RTSG_GROUND);
    02715     DrawSprite(SPR_FLAT_GRASS_TILE, PAL_NONE, x, y);
    02716     DrawSprite(ground + (img == SPR_RAIL_TRACK_X ? RTO_X : RTO_Y), PAL_NONE, x, y);
    02717   } else {
    02718     DrawSprite(img + total_offset, HasBit(img, PALETTE_MODIFIER_COLOUR) ? pal : PAL_NONE, x, y);
    02719   }
    02720
    02721   if (roadtype == ROADTYPE_TRAM) {
    02722     DrawSprite(SPR_TRAMWAY_TRAM + (t->ground.sprite == SPR_ROAD_PAVED_STRAIGHT_X ? 1 : 0), PAL_NONE, x, y);
    02723   }
    02724
    02725   /* Default waypoint has no railtype specific sprites */
    02726   DrawRailTileSeqInGUI(x, y, t, st == STATION_WAYPOINT ? 0 : total_offset, 0, pal);
    02727 }
    02728
    02729 static uint GetSlopeZ_Station(TileIndex tile, uint x, uint y)
    02730 {
    02731   return GetTileMaxZ(tile);
    02732 }
    02733
    02734 static Foundation GetFoundation_Station(TileIndex tile, Slope tileh)
    02735 {
    02736   return FlatteningFoundation(tileh);
    02737 }
    02738
    02739 static void GetTileDesc_Station(TileIndex tile, TileDesc *td)
    02740 {
    02741   td->owner[0] = GetTileOwner(tile);
    02742   if (IsDriveThroughStopTile(tile)) {
    02743     Owner road_owner = INVALID_OWNER;
    02744     Owner tram_owner = INVALID_OWNER;
    02745     RoadTypes rts = GetRoadTypes(tile);
    02746     if (HasBit(rts, ROADTYPE_ROAD)) road_owner = GetRoadOwner(tile, ROADTYPE_ROAD);
    02747     if (HasBit(rts, ROADTYPE_TRAM)) tram_owner = GetRoadOwner(tile, ROADTYPE_TRAM);
    02748
    02749     /* Is there a mix of owners? */
    02750     if ((tram_owner != INVALID_OWNER && tram_owner != td->owner[0]) ||
    02751         (road_owner != INVALID_OWNER && road_owner != td->owner[0])) {
    02752       uint i = 1;
    02753       if (road_owner != INVALID_OWNER) {
    02754         td->owner_type[i] = STR_LAND_AREA_INFORMATION_ROAD_OWNER;
    02755         td->owner[i] = road_owner;
    02756         i++;
    02757       }
    02758       if (tram_owner != INVALID_OWNER) {
    02759         td->owner_type[i] = STR_LAND_AREA_INFORMATION_TRAM_OWNER;
    02760         td->owner[i] = tram_owner;
    02761       }
    02762     }
    02763   }
    02764   td->build_date = BaseStation::GetByTile(tile)->build_date;
    02765
    02766   if (HasStationTileRail(tile)) {
    02767     const StationSpec *spec = GetStationSpec(tile);
    02768
    02769     if (spec != NULL) {
    02770       td->station_class = StationClass::GetName(spec->cls_id);
    02771       td->station_name  = spec->name;
    02772
    02773       if (spec->grf_prop.grffile != NULL) {
    02774         const GRFConfig *gc = GetGRFConfig(spec->grf_prop.grffile->grfid);
    02775         td->grf = gc->GetName();
    02776       }
    02777     }
    02778
    02779     const RailtypeInfo *rti = GetRailTypeInfo(GetRailType(tile));
    02780     td->rail_speed = rti->max_speed;
    02781   }
    02782
    02783   if (IsAirport(tile)) {
    02784     const AirportSpec *as = Station::GetByTile(tile)->airport.GetSpec();
    02785     td->airport_class = AirportClass::GetName(as->cls_id);
    02786     td->airport_name = as->name;
    02787
    02788     const AirportTileSpec *ats = AirportTileSpec::GetByTile(tile);
    02789     td->airport_tile_name = ats->name;
    02790
    02791     if (as->grf_prop.grffile != NULL) {
    02792       const GRFConfig *gc = GetGRFConfig(as->grf_prop.grffile->grfid);
    02793       td->grf = gc->GetName();
    02794     } else if (ats->grf_prop.grffile != NULL) {
    02795       const GRFConfig *gc = GetGRFConfig(ats->grf_prop.grffile->grfid);
    02796       td->grf = gc->GetName();
    02797     }
    02798   }
    02799
    02800   StringID str;
    02801   switch (GetStationType(tile)) {
    02802     default: NOT_REACHED();
    02803     case STATION_RAIL:     str = STR_LAI_STATION_DESCRIPTION_RAILROAD_STATION; break;
    02804     case STATION_AIRPORT:
    02805       str = (IsHangar(tile) ? STR_LAI_STATION_DESCRIPTION_AIRCRAFT_HANGAR : STR_LAI_STATION_DESCRIPTION_AIRPORT);
    02806       break;
    02807     case STATION_TRUCK:    str = STR_LAI_STATION_DESCRIPTION_TRUCK_LOADING_AREA; break;
    02808     case STATION_BUS:      str = STR_LAI_STATION_DESCRIPTION_BUS_STATION; break;
    02809     case STATION_OILRIG:   str = STR_INDUSTRY_NAME_OIL_RIG; break;
    02810     case STATION_DOCK:     str = STR_LAI_STATION_DESCRIPTION_SHIP_DOCK; break;
    02811     case STATION_BUOY:     str = STR_LAI_STATION_DESCRIPTION_BUOY; break;
    02812     case STATION_WAYPOINT: str = STR_LAI_STATION_DESCRIPTION_WAYPOINT; break;
    02813   }
    02814   td->str = str;
    02815 }
    02816
    02817
    02818 static TrackStatus GetTileTrackStatus_Station(TileIndex tile, TransportType mode, uint sub_mode, DiagDirection side)
    02819 {
    02820   TrackBits trackbits = TRACK_BIT_NONE;
    02821
    02822   switch (mode) {
    02823     case TRANSPORT_RAIL:
    02824       if (HasStationRail(tile) && !IsStationTileBlocked(tile)) {
    02825         trackbits = TrackToTrackBits(GetRailStationTrack(tile));
    02826       }
    02827       break;
    02828
    02829     case TRANSPORT_WATER:
    02830       /* buoy is coded as a station, it is always on open water */
    02831       if (IsBuoy(tile)) {
    02832         trackbits = TRACK_BIT_ALL;
    02833         /* remove tracks that connect NE map edge */
    02834         if (TileX(tile) == 0) trackbits &= ~(TRACK_BIT_X | TRACK_BIT_UPPER | TRACK_BIT_RIGHT);
    02835         /* remove tracks that connect NW map edge */
    02836         if (TileY(tile) == 0) trackbits &= ~(TRACK_BIT_Y | TRACK_BIT_LEFT | TRACK_BIT_UPPER);
    02837       }
    02838       break;
    02839
    02840     case TRANSPORT_ROAD:
    02841       if ((GetRoadTypes(tile) & sub_mode) != 0 && IsRoadStop(tile)) {
    02842         DiagDirection dir = GetRoadStopDir(tile);
    02843         Axis axis = DiagDirToAxis(dir);
    02844
    02845         if (side != INVALID_DIAGDIR) {
    02846           if (axis != DiagDirToAxis(side) || (IsStandardRoadStopTile(tile) && dir != side)) break;
    02847         }
    02848
    02849         trackbits = AxisToTrackBits(axis);
    02850       }
    02851       break;
    02852
    02853     default:
    02854       break;
    02855   }
    02856
    02857   return CombineTrackStatus(TrackBitsToTrackdirBits(trackbits), TRACKDIR_BIT_NONE);
    02858 }
    02859
    02860
    02861 static void TileLoop_Station(TileIndex tile)
    02862 {
    02863   /* FIXME -- GetTileTrackStatus_Station -> animated stationtiles
    02864    * hardcoded.....not good */
    02865   switch (GetStationType(tile)) {
    02866     case STATION_AIRPORT:
    02867       AirportTileAnimationTrigger(Station::GetByTile(tile), tile, AAT_TILELOOP);
    02868       break;
    02869
    02870     case STATION_DOCK:
    02871       if (GetTileSlope(tile, NULL) != SLOPE_FLAT) break; // only handle water part
    02872       /* FALL THROUGH */
    02873     case STATION_OILRIG: //(station part)
    02874     case STATION_BUOY:
    02875       TileLoop_Water(tile);
    02876       break;
    02877
    02878     default: break;
    02879   }
    02880 }
    02881
    02882
    02883 static void AnimateTile_Station(TileIndex tile)
    02884 {
    02885   if (HasStationRail(tile)) {
    02886     AnimateStationTile(tile);
    02887     return;
    02888   }
    02889
    02890   if (IsAirport(tile)) {
    02891     AnimateAirportTile(tile);
    02892   }
    02893 }
    02894
    02895
    02896 static bool ClickTile_Station(TileIndex tile)
    02897 {
    02898   const BaseStation *bst = BaseStation::GetByTile(tile);
    02899
    02900   if (bst->facilities & FACIL_WAYPOINT) {
    02901     ShowWaypointWindow(Waypoint::From(bst));
    02902   } else if (IsHangar(tile)) {
    02903     const Station *st = Station::From(bst);
    02904     ShowDepotWindow(st->airport.GetHangarTile(st->airport.GetHangarNum(tile)), VEH_AIRCRAFT);
    02905   } else {
    02906     ShowStationViewWindow(bst->index);
    02907   }
    02908   return true;
    02909 }
    02910
    02911 static VehicleEnterTileStatus VehicleEnter_Station(Vehicle *v, TileIndex tile, int x, int y)
    02912 {
    02913   if (v->type == VEH_TRAIN) {
    02914     StationID station_id = GetStationIndex(tile);
    02915     if (!v->current_order.ShouldStopAtStation(v, station_id)) return VETSB_CONTINUE;
    02916     if (!IsRailStation(tile) || !v->IsFrontEngine()) return VETSB_CONTINUE;
    02917
    02918     int station_ahead;
    02919     int station_length;
    02920     int stop = GetTrainStopLocation(station_id, tile, Train::From(v), &station_ahead, &station_length);
    02921
    02922     /* Stop whenever that amount of station ahead + the distance from the
    02923      * begin of the platform to the stop location is longer than the length
    02924      * of the platform. Station ahead 'includes' the current tile where the
    02925      * vehicle is on, so we need to substract that. */
    02926     if (!IsInsideBS(stop + station_ahead, station_length, TILE_SIZE)) return VETSB_CONTINUE;
    02927
    02928     DiagDirection dir = DirToDiagDir(v->direction);
    02929
    02930     x &= 0xF;
    02931     y &= 0xF;
    02932
    02933     if (DiagDirToAxis(dir) != AXIS_X) Swap(x, y);
    02934     if (y == TILE_SIZE / 2) {
    02935       if (dir != DIAGDIR_SE && dir != DIAGDIR_SW) x = TILE_SIZE - 1 - x;
    02936       stop &= TILE_SIZE - 1;
    02937
    02938       if (x == stop) return VETSB_ENTERED_STATION | (VehicleEnterTileStatus)(station_id << VETS_STATION_ID_OFFSET); // enter station
    02939       if (x < stop) {
    02940         uint16 spd;
    02941
    02942         v->vehstatus |= VS_TRAIN_SLOWING;
    02943         spd = max(0, (stop - x) * 20 - 15);
    02944         if (spd < v->cur_speed) v->cur_speed = spd;
    02945       }
    02946     }
    02947   } else if (v->type == VEH_ROAD) {
    02948     RoadVehicle *rv = RoadVehicle::From(v);
    02949     if (rv->state < RVSB_IN_ROAD_STOP && !IsReversingRoadTrackdir((Trackdir)rv->state) && rv->frame == 0) {
    02950       if (IsRoadStop(tile) && rv->IsFrontEngine()) {
    02951         /* Attempt to allocate a parking bay in a road stop */
    02952         return RoadStop::GetByTile(tile, GetRoadStopType(tile))->Enter(rv) ? VETSB_CONTINUE : VETSB_CANNOT_ENTER;
    02953       }
    02954     }
    02955   }
    02956
    02957   return VETSB_CONTINUE;
    02958 }
    02959
    02966 static bool StationHandleBigTick(BaseStation *st)
    02967 {
    02968   if (!st->IsInUse() && ++st->delete_ctr >= 8) {
    02969     delete st;
    02970     return false;
    02971   }
    02972
    02973   if ((st->facilities & FACIL_WAYPOINT) == 0) UpdateStationAcceptance(Station::From(st), true);
    02974
    02975   return true;
    02976 }
    02977
    02978 static inline void byte_inc_sat(byte *p)
    02979 {
    02980   byte b = *p + 1;
    02981   if (b != 0) *p = b;
    02982 }
    02983
    02984 static void UpdateStationRating(Station *st)
    02985 {
    02986   bool waiting_changed = false;
    02987
    02988   byte_inc_sat(&st->time_since_load);
    02989   byte_inc_sat(&st->time_since_unload);
    02990
    02991   const CargoSpec *cs;
    02992   FOR_ALL_CARGOSPECS(cs) {
    02993     GoodsEntry *ge = &st->goods[cs->Index()];
    02994     /* Slowly increase the rating back to his original level in the case we
    02995      *  didn't deliver cargo yet to this station. This happens when a bribe
    02996      *  failed while you didn't moved that cargo yet to a station. */
    02997     if (!HasBit(ge->acceptance_pickup, GoodsEntry::PICKUP) && ge->rating < INITIAL_STATION_RATING) {
    02998       ge->rating++;
    02999     }
    03000
    03001     /* Only change the rating if we are moving this cargo */
    03002     if (HasBit(ge->acceptance_pickup, GoodsEntry::PICKUP)) {
    03003       byte_inc_sat(&ge->days_since_pickup);
    03004
    03005       bool skip = false;
    03006       int rating = 0;
    03007       uint waiting = ge->cargo.Count();
    03008
    03009       if (HasBit(cs->callback_mask, CBM_CARGO_STATION_RATING_CALC)) {
    03010         /* Perform custom station rating. If it succeeds the speed, days in transit and
    03011          * waiting cargo ratings must not be executed. */
    03012
    03013         /* NewGRFs expect last speed to be 0xFF when no vehicle has arrived yet. */
    03014         uint last_speed = ge->last_speed;
    03015         if (last_speed == 0) last_speed = 0xFF;
    03016
    03017         uint32 var18 = min(ge->days_since_pickup, 0xFF) | (min(waiting, 0xFFFF) << 8) | (min(last_speed, 0xFF) << 24);
    03018         /* Convert to the 'old' vehicle types */
    03019         uint32 var10 = (st->last_vehicle_type == VEH_INVALID) ? 0x0 : (st->last_vehicle_type + 0x10);
    03020         uint16 callback = GetCargoCallback(CBID_CARGO_STATION_RATING_CALC, var10, var18, cs);
    03021         if (callback != CALLBACK_FAILED) {
    03022           skip = true;
    03023           rating = GB(callback, 0, 14);
    03024
    03025           /* Simulate a 15 bit signed value */
    03026           if (HasBit(callback, 14)) rating -= 0x4000;
    03027         }
    03028       }
    03029
    03030       if (!skip) {
    03031         int b = ge->last_speed - 85;
    03032         if (b >= 0) rating += b >> 2;
    03033
    03034         byte days = ge->days_since_pickup;
    03035         if (st->last_vehicle_type == VEH_SHIP) days >>= 2;
    03036         (days > 21) ||
    03037         (rating += 25, days > 12) ||
    03038         (rating += 25, days > 6) ||
    03039         (rating += 45, days > 3) ||
    03040         (rating += 35, true);
    03041
    03042         (rating -= 90, waiting > 1500) ||
    03043         (rating += 55, waiting > 1000) ||
    03044         (rating += 35, waiting > 600) ||
    03045         (rating += 10, waiting > 300) ||
    03046         (rating += 20, waiting > 100) ||
    03047         (rating += 10, true);
    03048       }
    03049
    03050       if (Company::IsValidID(st->owner) && HasBit(st->town->statues, st->owner)) rating += 26;
    03051
    03052       byte age = ge->last_age;
    03053       (age >= 3) ||
    03054       (rating += 10, age >= 2) ||
    03055       (rating += 10, age >= 1) ||
    03056       (rating += 13, true);
    03057
    03058       {
    03059         int or_ = ge->rating; // old rating
    03060
    03061         /* only modify rating in steps of -2, -1, 0, 1 or 2 */
    03062         ge->rating = rating = or_ + Clamp(Clamp(rating, 0, 255) - or_, -2, 2);
    03063
    03064         /* if rating is <= 64 and more than 200 items waiting,
    03065          * remove some random amount of goods from the station */
    03066         if (rating <= 64 && waiting >= 200) {
    03067           int dec = Random() & 0x1F;
    03068           if (waiting < 400) dec &= 7;
    03069           waiting -= dec + 1;
    03070           waiting_changed = true;
    03071         }
    03072
    03073         /* if rating is <= 127 and there are any items waiting, maybe remove some goods. */
    03074         if (rating <= 127 && waiting != 0) {
    03075           uint32 r = Random();
    03076           if (rating <= (int)GB(r, 0, 7)) {
    03077             /* Need to have int, otherwise it will just overflow etc. */
    03078             waiting = max((int)waiting - (int)GB(r, 8, 2) - 1, 0);
    03079             waiting_changed = true;
    03080           }
    03081         }
    03082
    03083         /* At some point we really must cap the cargo. Previously this
    03084          * was a strict 4095, but now we'll have a less strict, but
    03085          * increasingly agressive truncation of the amount of cargo. */
    03086         static const uint WAITING_CARGO_THRESHOLD  = 1 << 12;
    03087         static const uint WAITING_CARGO_CUT_FACTOR = 1 <<  6;
    03088         static const uint MAX_WAITING_CARGO        = 1 << 15;
    03089
    03090         if (waiting > WAITING_CARGO_THRESHOLD) {
    03091           uint difference = waiting - WAITING_CARGO_THRESHOLD;
    03092           waiting -= (difference / WAITING_CARGO_CUT_FACTOR);
    03093
    03094           waiting = min(waiting, MAX_WAITING_CARGO);
    03095           waiting_changed = true;
    03096         }
    03097
    03098         if (waiting_changed) ge->cargo.Truncate(waiting);
    03099       }
    03100     }
    03101   }
    03102
    03103   StationID index = st->index;
    03104   if (waiting_changed) {
    03105     SetWindowDirty(WC_STATION_VIEW, index); // update whole window
    03106   } else {
    03107     SetWindowWidgetDirty(WC_STATION_VIEW, index, SVW_RATINGLIST); // update only ratings list
    03108   }
    03109 }
    03110
    03111 /* called for every station each tick */
    03112 static void StationHandleSmallTick(BaseStation *st)
    03113 {
    03114   if ((st->facilities & FACIL_WAYPOINT) != 0 || !st->IsInUse()) return;
    03115
    03116   byte b = st->delete_ctr + 1;
    03117   if (b >= 185) b = 0;
    03118   st->delete_ctr = b;
    03119
    03120   if (b == 0) UpdateStationRating(Station::From(st));
    03121 }
    03122
    03123 void OnTick_Station()
    03124 {
    03125   if (_game_mode == GM_EDITOR) return;
    03126
    03127   BaseStation *st;
    03128   FOR_ALL_BASE_STATIONS(st) {
    03129     StationHandleSmallTick(st);
    03130
    03131     /* Run 250 tick interval trigger for station animation.
    03132      * Station index is included so that triggers are not all done
    03133      * at the same time. */
    03134     if ((_tick_counter + st->index) % 250 == 0) {
    03135       /* Stop processing this station if it was deleted */
    03136       if (!StationHandleBigTick(st)) continue;
    03137       TriggerStationAnimation(st, st->xy, SAT_250_TICKS);
    03138       if (Station::IsExpected(st)) AirportAnimationTrigger(Station::From(st), AAT_STATION_250_TICKS);
    03139     }
    03140   }
    03141 }
    03142
    03143 void StationMonthlyLoop()
    03144 {
    03145   /* not used */
    03146 }
    03147
    03148
    03149 void ModifyStationRatingAround(TileIndex tile, Owner owner, int amount, uint radius)
    03150 {
    03151   Station *st;
    03152
    03153   FOR_ALL_STATIONS(st) {
    03154     if (st->owner == owner &&
    03155         DistanceManhattan(tile, st->xy) <= radius) {
    03156       for (CargoID i = 0; i < NUM_CARGO; i++) {
    03157         GoodsEntry *ge = &st->goods[i];
    03158
    03159         if (ge->acceptance_pickup != 0) {
    03160           ge->rating = Clamp(ge->rating + amount, 0, 255);
    03161         }
    03162       }
    03163     }
    03164   }
    03165 }
    03166
    03167 static uint UpdateStationWaiting(Station *st, CargoID type, uint amount, SourceType source_type, SourceID source_id)
    03168 {
    03169   /* We can't allocate a CargoPacket? Then don't do anything
    03170    * at all; i.e. just discard the incoming cargo. */
    03171   if (!CargoPacket::CanAllocateItem()) return 0;
    03172
    03173   GoodsEntry &ge = st->goods[type];
    03174   amount += ge.amount_fract;
    03175   ge.amount_fract = GB(amount, 0, 8);
    03176
    03177   amount >>= 8;
    03178   /* No new "real" cargo item yet. */
    03179   if (amount == 0) return 0;
    03180
    03181   ge.cargo.Append(new CargoPacket(st->index, st->xy, amount, source_type, source_id));
    03182
    03183   if (!HasBit(ge.acceptance_pickup, GoodsEntry::PICKUP)) {
    03184     InvalidateWindowData(WC_STATION_LIST, st->index);
    03185     SetBit(ge.acceptance_pickup, GoodsEntry::PICKUP);
    03186   }
    03187
    03188   TriggerStationAnimation(st, st->xy, SAT_NEW_CARGO, type);
    03189   AirportAnimationTrigger(st, AAT_STATION_NEW_CARGO, type);
    03190
    03191   SetWindowDirty(WC_STATION_VIEW, st->index);
    03192   st->MarkTilesDirty(true);
    03193   return amount;
    03194 }
    03195
    03196 static bool IsUniqueStationName(const char *name)
    03197 {
    03198   const Station *st;
    03199
    03200   FOR_ALL_STATIONS(st) {
    03201     if (st->name != NULL && strcmp(st->name, name) == 0) return false;
    03202   }
    03203
    03204   return true;
    03205 }
    03206
    03216 CommandCost CmdRenameStation(TileIndex tile, DoCommandFlag flags, uint32 p1, uint32 p2, const char *text)
    03217 {
    03218   Station *st = Station::GetIfValid(p1);
    03219   if (st == NULL) return CMD_ERROR;
    03220
    03221   CommandCost ret = CheckOwnership(st->owner);
    03222   if (ret.Failed()) return ret;
    03223
    03224   bool reset = StrEmpty(text);
    03225
    03226   if (!reset) {
    03227     if (Utf8StringLength(text) >= MAX_LENGTH_STATION_NAME_CHARS) return CMD_ERROR;
    03228     if (!IsUniqueStationName(text)) return_cmd_error(STR_ERROR_NAME_MUST_BE_UNIQUE);
    03229   }
    03230
    03231   if (flags & DC_EXEC) {
    03232     free(st->name);
    03233     st->name = reset ? NULL : strdup(text);
    03234
    03235     st->UpdateVirtCoord();
    03236     InvalidateWindowData(WC_STATION_LIST, st->owner, 1);
    03237   }
    03238
    03239   return CommandCost();
    03240 }
    03241
    03248 void FindStationsAroundTiles(const TileArea &location, StationList *stations)
    03249 {
    03250   /* area to search = producer plus station catchment radius */
    03251   int max_rad = (_settings_game.station.modified_catchment ? MAX_CATCHMENT : CA_UNMODIFIED);
    03252
    03253   for (int dy = -max_rad; dy < location.h + max_rad; dy++) {
    03254     for (int dx = -max_rad; dx < location.w + max_rad; dx++) {
    03255       TileIndex cur_tile = TileAddWrap(location.tile, dx, dy);
    03256       if (cur_tile == INVALID_TILE || !IsTileType(cur_tile, MP_STATION)) continue;
    03257
    03258       Station *st = Station::GetByTile(cur_tile);
    03259       if (st == NULL) continue;
    03260
    03261       if (_settings_game.station.modified_catchment) {
    03262         int rad = st->GetCatchmentRadius();
    03263         if (dx < -rad || dx >= rad + location.w || dy < -rad || dy >= rad + location.h) continue;
    03264       }
    03265
    03266       /* Insert the station in the set. This will fail if it has
    03267        * already been added.
    03268        */
    03269       stations->Include(st);
    03270     }
    03271   }
    03272 }
    03273
    03278 const StationList *StationFinder::GetStations()
    03279 {
    03280   if (this->tile != INVALID_TILE) {
    03281     FindStationsAroundTiles(*this, &this->stations);
    03282     this->tile = INVALID_TILE;
    03283   }
    03284   return &this->stations;
    03285 }
    03286
    03287 uint MoveGoodsToStation(CargoID type, uint amount, SourceType source_type, SourceID source_id, const StationList *all_stations)
    03288 {
    03289   /* Return if nothing to do. Also the rounding below fails for 0. */
    03290   if (amount == 0) return 0;
    03291
    03292   Station *st1 = NULL;   // Station with best rating
    03293   Station *st2 = NULL;   // Second best station
    03294   uint best_rating1 = 0; // rating of st1
    03295   uint best_rating2 = 0; // rating of st2
    03296
    03297   for (Station * const *st_iter = all_stations->Begin(); st_iter != all_stations->End(); ++st_iter) {
    03298     Station *st = *st_iter;
    03299
    03300     /* Is the station reserved exclusively for somebody else? */
    03301     if (st->town->exclusive_counter > 0 && st->town->exclusivity != st->owner) continue;
    03302
    03303     if (st->goods[type].rating == 0) continue; // Lowest possible rating, better not to give cargo anymore
    03304
    03305     if (_settings_game.order.selectgoods && st->goods[type].last_speed == 0) continue; // Selectively servicing stations, and not this one
    03306
    03307     if (IsCargoInClass(type, CC_PASSENGERS)) {
    03308       if (st->facilities == FACIL_TRUCK_STOP) continue; // passengers are never served by just a truck stop
    03309     } else {
    03310       if (st->facilities == FACIL_BUS_STOP) continue; // non-passengers are never served by just a bus stop
    03311     }
    03312
    03313     /* This station can be used, add it to st1/st2 */
    03314     if (st1 == NULL || st->goods[type].rating >= best_rating1) {
    03315       st2 = st1; best_rating2 = best_rating1; st1 = st; best_rating1 = st->goods[type].rating;
    03316     } else if (st2 == NULL || st->goods[type].rating >= best_rating2) {
    03317       st2 = st; best_rating2 = st->goods[type].rating;
    03318     }
    03319   }
    03320
    03321   /* no stations around at all? */
    03322   if (st1 == NULL) return 0;
    03323
    03324   /* From now we'll calculate with fractal cargo amounts.
    03325    * First determine how much cargo we really have. */
    03326   amount *= best_rating1 + 1;
    03327
    03328   if (st2 == NULL) {
    03329     /* only one station around */
    03330     return UpdateStationWaiting(st1, type, amount, source_type, source_id);
    03331   }
    03332
    03333   /* several stations around, the best two (highest rating) are in st1 and st2 */
    03334   assert(st1 != NULL);
    03335   assert(st2 != NULL);
    03336   assert(best_rating1 != 0 || best_rating2 != 0);
    03337
    03338   /* Then determine the amount the worst station gets. We do it this way as the
    03339    * best should get a bonus, which in this case is the rounding difference from
    03340    * this calculation. In reality that will mean the bonus will be pretty low.
    03341    * Nevertheless, the best station should always get the most cargo regardless
    03342    * of rounding issues. */
    03343   uint worst_cargo = amount * best_rating2 / (best_rating1 + best_rating2);
    03344   assert(worst_cargo <= (amount - worst_cargo));
    03345
    03346   /* And then send the cargo to the stations! */
    03347   uint moved = UpdateStationWaiting(st1, type, amount - worst_cargo, source_type, source_id);
    03348   /* These two UpdateStationWaiting's can't be in the statement as then the order
    03349    * of execution would be undefined and that could cause desyncs with callbacks. */
    03350   return moved + UpdateStationWaiting(st2, type, worst_cargo, source_type, source_id);
    03351 }
    03352
    03353 void BuildOilRig(TileIndex tile)
    03354 {
    03355   if (!Station::CanAllocateItem()) {
    03356     DEBUG(misc, 0, "Can't allocate station for oilrig at 0x%X, reverting to oilrig only", tile);
    03357     return;
    03358   }
    03359
    03360   Station *st = new Station(tile);
    03361   st->town = ClosestTownFromTile(tile, UINT_MAX);
    03362
    03363   st->string_id = GenerateStationName(st, tile, STATIONNAMING_OILRIG);
    03364
    03365   assert(IsTileType(tile, MP_INDUSTRY));
    03366   DeleteAnimatedTile(tile);
    03367   MakeOilrig(tile, st->index, GetWaterClass(tile));
    03368
    03369   st->owner = OWNER_NONE;
    03370   st->airport.type = AT_OILRIG;
    03371   st->airport.Add(tile);
    03372   st->dock_tile = tile;
    03373   st->facilities = FACIL_AIRPORT | FACIL_DOCK;
    03374   st->build_date = _date;
    03375
    03376   st->rect.BeforeAddTile(tile, StationRect::ADD_FORCE);
    03377
    03378   for (CargoID j = 0; j < NUM_CARGO; j++) {
    03379     st->goods[j].acceptance_pickup = 0;
    03380     st->goods[j].days_since_pickup = 255;
    03381     st->goods[j].rating = INITIAL_STATION_RATING;
    03382     st->goods[j].last_speed = 0;
    03383     st->goods[j].last_age = 255;
    03384   }
    03385
    03386   st->UpdateVirtCoord();
    03387   UpdateStationAcceptance(st, false);
    03388   st->RecomputeIndustriesNear();
    03389 }
    03390
    03391 void DeleteOilRig(TileIndex tile)
    03392 {
    03393   Station *st = Station::GetByTile(tile);
    03394
    03395   MakeWaterKeepingClass(tile, OWNER_NONE);
    03396
    03397   st->dock_tile = INVALID_TILE;
    03398   st->airport.Clear();
    03399   st->facilities &= ~(FACIL_AIRPORT | FACIL_DOCK);
    03400   st->airport.flags = 0;
    03401
    03402   st->rect.AfterRemoveTile(st, tile);
    03403
    03404   st->UpdateVirtCoord();
    03405   st->RecomputeIndustriesNear();
    03406   if (!st->IsInUse()) delete st;
    03407 }
    03408
    03409 static void ChangeTileOwner_Station(TileIndex tile, Owner old_owner, Owner new_owner)
    03410 {
    03411   if (IsDriveThroughStopTile(tile)) {
    03412     for (RoadType rt = ROADTYPE_ROAD; rt < ROADTYPE_END; rt++) {
    03413       /* Update all roadtypes, no matter if they are present */
    03414       if (GetRoadOwner(tile, rt) == old_owner) {
    03415         SetRoadOwner(tile, rt, new_owner == INVALID_OWNER ? OWNER_NONE : new_owner);
    03416       }
    03417     }
    03418   }
    03419
    03420   if (!IsTileOwner(tile, old_owner)) return;
    03421
    03422   if (new_owner != INVALID_OWNER) {
    03423     /* for buoys, owner of tile is owner of water, st->owner == OWNER_NONE */
    03424     SetTileOwner(tile, new_owner);
    03425     InvalidateWindowClassesData(WC_STATION_LIST, 0);
    03426   } else {
    03427     if (IsDriveThroughStopTile(tile)) {
    03428       /* Remove the drive-through road stop */
    03429       DoCommand(tile, 1 | 1 << 8, (GetStationType(tile) == STATION_TRUCK) ? ROADSTOP_TRUCK : ROADSTOP_BUS, DC_EXEC | DC_BANKRUPT, CMD_REMOVE_ROAD_STOP);
    03430       assert(IsTileType(tile, MP_ROAD));
    03431       /* Change owner of tile and all roadtypes */
    03432       ChangeTileOwner(tile, old_owner, new_owner);
    03433     } else {
    03434       DoCommand(tile, 0, 0, DC_EXEC | DC_BANKRUPT, CMD_LANDSCAPE_CLEAR);
    03435       /* Set tile owner of water under (now removed) buoy and dock to OWNER_NONE.
    03436        * Update owner of buoy if it was not removed (was in orders).
    03437        * Do not update when owned by OWNER_WATER (sea and rivers). */
    03438       if ((IsTileType(tile, MP_WATER) || IsBuoyTile(tile)) && IsTileOwner(tile, old_owner)) SetTileOwner(tile, OWNER_NONE);
    03439     }
    03440   }
    03441 }
    03442
    03451 static bool CanRemoveRoadWithStop(TileIndex tile, DoCommandFlag flags)
    03452 {
    03453   /* Yeah... water can always remove stops, right? */
    03454   if (_current_company == OWNER_WATER) return true;
    03455
    03456   RoadTypes rts = GetRoadTypes(tile);
    03457   if (HasBit(rts, ROADTYPE_TRAM)) {
    03458     Owner tram_owner = GetRoadOwner(tile, ROADTYPE_TRAM);
    03459     if (tram_owner != OWNER_NONE && CheckOwnership(tram_owner).Failed()) return false;
    03460   }
    03461   if (HasBit(rts, ROADTYPE_ROAD)) {
    03462     Owner road_owner = GetRoadOwner(tile, ROADTYPE_ROAD);
    03463     if (road_owner != OWNER_TOWN) {
    03464       if (road_owner != OWNER_NONE && CheckOwnership(road_owner).Failed()) return false;
    03465     } else {
    03466       if (CheckAllowRemoveRoad(tile, GetAnyRoadBits(tile, ROADTYPE_ROAD), OWNER_TOWN, ROADTYPE_ROAD, flags).Failed()) return false;
    03467     }
    03468   }
    03469
    03470   return true;
    03471 }
    03472
    03473 CommandCost ClearTile_Station(TileIndex tile, DoCommandFlag flags)
    03474 {
    03475   if (flags & DC_AUTO) {
    03476     switch (GetStationType(tile)) {
    03477       default: break;
    03478       case STATION_RAIL:     return_cmd_error(STR_ERROR_MUST_DEMOLISH_RAILROAD);
    03479       case STATION_WAYPOINT: return_cmd_error(STR_ERROR_BUILDING_MUST_BE_DEMOLISHED);
    03480       case STATION_AIRPORT:  return_cmd_error(STR_ERROR_MUST_DEMOLISH_AIRPORT_FIRST);
    03481       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);
    03482       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);
    03483       case STATION_BUOY:     return_cmd_error(STR_ERROR_BUOY_IN_THE_WAY);
    03484       case STATION_DOCK:     return_cmd_error(STR_ERROR_MUST_DEMOLISH_DOCK_FIRST);
    03485       case STATION_OILRIG:
    03486         SetDParam(1, STR_INDUSTRY_NAME_OIL_RIG);
    03487         return_cmd_error(STR_ERROR_GENERIC_OBJECT_IN_THE_WAY);
    03488     }
    03489   }
    03490
    03491   switch (GetStationType(tile)) {
    03492     case STATION_RAIL:     return RemoveRailStation(tile, flags);
    03493     case STATION_WAYPOINT: return RemoveRailWaypoint(tile, flags);
    03494     case STATION_AIRPORT:  return RemoveAirport(tile, flags);
    03495     case STATION_TRUCK:
    03496       if (IsDriveThroughStopTile(tile) && !CanRemoveRoadWithStop(tile, flags)) {
    03497         return_cmd_error(STR_ERROR_MUST_DEMOLISH_TRUCK_STATION_FIRST);
    03498       }
    03499       return RemoveRoadStop(tile, flags);
    03500     case STATION_BUS:
    03501       if (IsDriveThroughStopTile(tile) && !CanRemoveRoadWithStop(tile, flags)) {
    03502         return_cmd_error(STR_ERROR_MUST_DEMOLISH_BUS_STATION_FIRST);
    03503       }
    03504       return RemoveRoadStop(tile, flags);
    03505     case STATION_BUOY:     return RemoveBuoy(tile, flags);
    03506     case STATION_DOCK:     return RemoveDock(tile, flags);
    03507     default: break;
    03508   }
    03509
    03510   return CMD_ERROR;
    03511 }
    03512
    03513 static CommandCost TerraformTile_Station(TileIndex tile, DoCommandFlag flags, uint z_new, Slope tileh_new)
    03514 {
    03515   if (_settings_game.construction.build_on_slopes && AutoslopeEnabled()) {
    03516     /* TODO: If you implement newgrf callback 149 'land slope check', you have to decide what to do with it here.
    03517      *       TTDP does not call it.
    03518      */
    03519     if (!IsSteepSlope(tileh_new) && (GetTileMaxZ(tile) == z_new + GetSlopeMaxZ(tileh_new))) {
    03520       switch (GetStationType(tile)) {
    03521         case STATION_WAYPOINT:
    03522         case STATION_RAIL: {
    03523           DiagDirection direction = AxisToDiagDir(GetRailStationAxis(tile));
    03524           if (!AutoslopeCheckForEntranceEdge(tile, z_new, tileh_new, direction)) break;
    03525           if (!AutoslopeCheckForEntranceEdge(tile, z_new, tileh_new, ReverseDiagDir(direction))) break;
    03526           return CommandCost(EXPENSES_CONSTRUCTION, _price[PR_BUILD_FOUNDATION]);
    03527         }
    03528
    03529         case STATION_AIRPORT:
    03530           return CommandCost(EXPENSES_CONSTRUCTION, _price[PR_BUILD_FOUNDATION]);
    03531
    03532         case STATION_TRUCK:
    03533         case STATION_BUS: {
    03534           DiagDirection direction = GetRoadStopDir(tile);
    03535           if (!AutoslopeCheckForEntranceEdge(tile, z_new, tileh_new, direction)) break;
    03536           if (IsDriveThroughStopTile(tile)) {
    03537             if (!AutoslopeCheckForEntranceEdge(tile, z_new, tileh_new, ReverseDiagDir(direction))) break;
    03538           }
    03539           return CommandCost(EXPENSES_CONSTRUCTION, _price[PR_BUILD_FOUNDATION]);
    03540         }
    03541
    03542         default: break;
    03543       }
    03544     }
    03545   }
    03546   return DoCommand(tile, 0, 0, flags, CMD_LANDSCAPE_CLEAR);
    03547 }
    03548
    03549
    03550 extern const TileTypeProcs _tile_type_station_procs = {
    03551   DrawTile_Station,           // draw_tile_proc
    03552   GetSlopeZ_Station,          // get_slope_z_proc
    03553   ClearTile_Station,          // clear_tile_proc
    03554   NULL,                       // add_accepted_cargo_proc
    03555   GetTileDesc_Station,        // get_tile_desc_proc
    03556   GetTileTrackStatus_Station, // get_tile_track_status_proc
    03557   ClickTile_Station,          // click_tile_proc
    03558   AnimateTile_Station,        // animate_tile_proc
    03559   TileLoop_Station,           // tile_loop_clear
    03560   ChangeTileOwner_Station,    // change_tile_owner_clear
    03561   NULL,                       // add_produced_cargo_proc
    03562   VehicleEnter_Station,       // vehicle_enter_tile_proc
    03563   GetFoundation_Station,      // get_foundation_proc
    03564   TerraformTile_Station,      // terraform_tile_proc
    03565 };