# station_cmd.cpp

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    00001 /* $Id: station_cmd.cpp 23053 2011-10-22 21:06:58Z rubidium $ */
    00002
    00003 /*
    00004  * This file is part of OpenTTD.
    00005  * OpenTTD is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, version 2.
    00006  * OpenTTD is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
    00007  * See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with OpenTTD. If not, see <http://www.gnu.org/licenses/>.
    00008  */
    00009
    00012 #include "stdafx.h"
    00013 #include "aircraft.h"
    00014 #include "bridge_map.h"
    00015 #include "cmd_helper.h"
    00016 #include "viewport_func.h"
    00017 #include "command_func.h"
    00018 #include "town.h"
    00019 #include "news_func.h"
    00020 #include "train.h"
    00021 #include "roadveh.h"
    00022 #include "industry.h"
    00023 #include "newgrf_cargo.h"
    00024 #include "newgrf_debug.h"
    00025 #include "newgrf_station.h"
    00026 #include "newgrf_canal.h" /* For the buoy */
    00027 #include "pathfinder/yapf/yapf_cache.h"
    00028 #include "road_internal.h" /* For drawing catenary/checking road removal */
    00029 #include "autoslope.h"
    00030 #include "water.h"
    00031 #include "station_gui.h"
    00032 #include "strings_func.h"
    00033 #include "clear_func.h"
    00034 #include "window_func.h"
    00035 #include "date_func.h"
    00036 #include "vehicle_func.h"
    00037 #include "string_func.h"
    00038 #include "animated_tile_func.h"
    00039 #include "elrail_func.h"
    00040 #include "station_base.h"
    00041 #include "roadstop_base.h"
    00042 #include "newgrf_railtype.h"
    00043 #include "waypoint_base.h"
    00044 #include "waypoint_func.h"
    00045 #include "pbs.h"
    00046 #include "debug.h"
    00047 #include "core/random_func.hpp"
    00048 #include "company_base.h"
    00049 #include "table/airporttile_ids.h"
    00050 #include "newgrf_airporttiles.h"
    00051 #include "order_backup.h"
    00052
    00053 #include "table/strings.h"
    00054
    00061 bool IsHangar(TileIndex t)
    00062 {
    00063   assert(IsTileType(t, MP_STATION));
    00064
    00065   /* If the tile isn't an airport there's no chance it's a hangar. */
    00066   if (!IsAirport(t)) return false;
    00067
    00068   const Station *st = Station::GetByTile(t);
    00069   const AirportSpec *as = st->airport.GetSpec();
    00070
    00071   for (uint i = 0; i < as->nof_depots; i++) {
    00072     if (st->airport.GetHangarTile(i) == t) return true;
    00073   }
    00074
    00075   return false;
    00076 }
    00077
    00085 template <class T>
    00086 CommandCost GetStationAround(TileArea ta, StationID closest_station, T **st)
    00087 {
    00088   ta.tile -= TileDiffXY(1, 1);
    00089   ta.w    += 2;
    00090   ta.h    += 2;
    00091
    00092   /* check around to see if there's any stations there */
    00093   TILE_AREA_LOOP(tile_cur, ta) {
    00094     if (IsTileType(tile_cur, MP_STATION)) {
    00095       StationID t = GetStationIndex(tile_cur);
    00096       if (!T::IsValidID(t)) continue;
    00097
    00098       if (closest_station == INVALID_STATION) {
    00099         closest_station = t;
    00100       } else if (closest_station != t) {
    00101         return_cmd_error(STR_ERROR_ADJOINS_MORE_THAN_ONE_EXISTING);
    00102       }
    00103     }
    00104   }
    00105   *st = (closest_station == INVALID_STATION) ? NULL : T::Get(closest_station);
    00106   return CommandCost();
    00107 }
    00108
    00114 typedef bool (*CMSAMatcher)(TileIndex tile);
    00115
    00122 static int CountMapSquareAround(TileIndex tile, CMSAMatcher cmp)
    00123 {
    00124   int num = 0;
    00125
    00126   for (int dx = -3; dx <= 3; dx++) {
    00127     for (int dy = -3; dy <= 3; dy++) {
    00128       TileIndex t = TileAddWrap(tile, dx, dy);
    00129       if (t != INVALID_TILE && cmp(t)) num++;
    00130     }
    00131   }
    00132
    00133   return num;
    00134 }
    00135
    00141 static bool CMSAMine(TileIndex tile)
    00142 {
    00143   /* No industry */
    00144   if (!IsTileType(tile, MP_INDUSTRY)) return false;
    00145
    00146   const Industry *ind = Industry::GetByTile(tile);
    00147
    00148   /* No extractive industry */
    00149   if ((GetIndustrySpec(ind->type)->life_type & INDUSTRYLIFE_EXTRACTIVE) == 0) return false;
    00150
    00151   for (uint i = 0; i < lengthof(ind->produced_cargo); i++) {
    00152     /* The industry extracts something non-liquid, i.e. no oil or plastic, so it is a mine.
    00153      * Also the production of passengers and mail is ignored. */
    00154     if (ind->produced_cargo[i] != CT_INVALID &&
    00155         (CargoSpec::Get(ind->produced_cargo[i])->classes & (CC_LIQUID | CC_PASSENGERS | CC_MAIL)) == 0) {
    00156       return true;
    00157     }
    00158   }
    00159
    00160   return false;
    00161 }
    00162
    00168 static bool CMSAWater(TileIndex tile)
    00169 {
    00170   return IsTileType(tile, MP_WATER) && IsWater(tile);
    00171 }
    00172
    00178 static bool CMSATree(TileIndex tile)
    00179 {
    00180   return IsTileType(tile, MP_TREES);
    00181 }
    00182
    00183 #define M(x) ((x) - STR_SV_STNAME)
    00184
    00185 enum StationNaming {
    00186   STATIONNAMING_RAIL,
    00187   STATIONNAMING_ROAD,
    00188   STATIONNAMING_AIRPORT,
    00189   STATIONNAMING_OILRIG,
    00190   STATIONNAMING_DOCK,
    00191   STATIONNAMING_HELIPORT,
    00192 };
    00193
    00195 struct StationNameInformation {
    00196   uint32 free_names;
    00197   bool *indtypes;
    00198 };
    00199
    00208 static bool FindNearIndustryName(TileIndex tile, void *user_data)
    00209 {
    00210   /* All already found industry types */
    00211   StationNameInformation *sni = (StationNameInformation*)user_data;
    00212   if (!IsTileType(tile, MP_INDUSTRY)) return false;
    00213
    00214   /* If the station name is undefined it means that it doesn't name a station */
    00215   IndustryType indtype = GetIndustryType(tile);
    00216   if (GetIndustrySpec(indtype)->station_name == STR_UNDEFINED) return false;
    00217
    00218   /* In all cases if an industry that provides a name is found two of
    00219    * the standard names will be disabled. */
    00220   sni->free_names &= ~(1 << M(STR_SV_STNAME_OILFIELD) | 1 << M(STR_SV_STNAME_MINES));
    00221   return !sni->indtypes[indtype];
    00222 }
    00223
    00224 static StringID GenerateStationName(Station *st, TileIndex tile, StationNaming name_class)
    00225 {
    00226   static const uint32 _gen_station_name_bits[] = {
    00227     0,                                       // STATIONNAMING_RAIL
    00228     0,                                       // STATIONNAMING_ROAD
    00229     1U << M(STR_SV_STNAME_AIRPORT),          // STATIONNAMING_AIRPORT
    00230     1U << M(STR_SV_STNAME_OILFIELD),         // STATIONNAMING_OILRIG
    00231     1U << M(STR_SV_STNAME_DOCKS),            // STATIONNAMING_DOCK
    00232     1U << M(STR_SV_STNAME_HELIPORT),         // STATIONNAMING_HELIPORT
    00233   };
    00234
    00235   const Town *t = st->town;
    00236   uint32 free_names = UINT32_MAX;
    00237
    00238   bool indtypes[NUM_INDUSTRYTYPES];
    00239   memset(indtypes, 0, sizeof(indtypes));
    00240
    00241   const Station *s;
    00242   FOR_ALL_STATIONS(s) {
    00243     if (s != st && s->town == t) {
    00244       if (s->indtype != IT_INVALID) {
    00245         indtypes[s->indtype] = true;
    00246         continue;
    00247       }
    00248       uint str = M(s->string_id);
    00249       if (str <= 0x20) {
    00250         if (str == M(STR_SV_STNAME_FOREST)) {
    00251           str = M(STR_SV_STNAME_WOODS);
    00252         }
    00253         ClrBit(free_names, str);
    00254       }
    00255     }
    00256   }
    00257
    00258   TileIndex indtile = tile;
    00259   StationNameInformation sni = { free_names, indtypes };
    00260   if (CircularTileSearch(&indtile, 7, FindNearIndustryName, &sni)) {
    00261     /* An industry has been found nearby */
    00262     IndustryType indtype = GetIndustryType(indtile);
    00263     const IndustrySpec *indsp = GetIndustrySpec(indtype);
    00264     /* STR_NULL means it only disables oil rig/mines */
    00265     if (indsp->station_name != STR_NULL) {
    00266       st->indtype = indtype;
    00267       return STR_SV_STNAME_FALLBACK;
    00268     }
    00269   }
    00270
    00271   /* Oil rigs/mines name could be marked not free by looking for a near by industry. */
    00272   free_names = sni.free_names;
    00273
    00274   /* check default names */
    00275   uint32 tmp = free_names & _gen_station_name_bits[name_class];
    00276   if (tmp != 0) return STR_SV_STNAME + FindFirstBit(tmp);
    00277
    00278   /* check mine? */
    00279   if (HasBit(free_names, M(STR_SV_STNAME_MINES))) {
    00280     if (CountMapSquareAround(tile, CMSAMine) >= 2) {
    00281       return STR_SV_STNAME_MINES;
    00282     }
    00283   }
    00284
    00285   /* check close enough to town to get central as name? */
    00286   if (DistanceMax(tile, t->xy) < 8) {
    00287     if (HasBit(free_names, M(STR_SV_STNAME))) return STR_SV_STNAME;
    00288
    00289     if (HasBit(free_names, M(STR_SV_STNAME_CENTRAL))) return STR_SV_STNAME_CENTRAL;
    00290   }
    00291
    00292   /* Check lakeside */
    00293   if (HasBit(free_names, M(STR_SV_STNAME_LAKESIDE)) &&
    00294       DistanceFromEdge(tile) < 20 &&
    00295       CountMapSquareAround(tile, CMSAWater) >= 5) {
    00296     return STR_SV_STNAME_LAKESIDE;
    00297   }
    00298
    00299   /* Check woods */
    00300   if (HasBit(free_names, M(STR_SV_STNAME_WOODS)) && (
    00301         CountMapSquareAround(tile, CMSATree) >= 8 ||
    00302         CountMapSquareAround(tile, IsTileForestIndustry) >= 2)
    00303       ) {
    00304     return _settings_game.game_creation.landscape == LT_TROPIC ? STR_SV_STNAME_FOREST : STR_SV_STNAME_WOODS;
    00305   }
    00306
    00307   /* check elevation compared to town */
    00308   uint z = GetTileZ(tile);
    00309   uint z2 = GetTileZ(t->xy);
    00310   if (z < z2) {
    00311     if (HasBit(free_names, M(STR_SV_STNAME_VALLEY))) return STR_SV_STNAME_VALLEY;
    00312   } else if (z > z2) {
    00313     if (HasBit(free_names, M(STR_SV_STNAME_HEIGHTS))) return STR_SV_STNAME_HEIGHTS;
    00314   }
    00315
    00316   /* check direction compared to town */
    00317   static const int8 _direction_and_table[] = {
    00318     ~( (1 << M(STR_SV_STNAME_WEST))  | (1 << M(STR_SV_STNAME_EAST)) | (1 << M(STR_SV_STNAME_NORTH)) ),
    00319     ~( (1 << M(STR_SV_STNAME_SOUTH)) | (1 << M(STR_SV_STNAME_WEST)) | (1 << M(STR_SV_STNAME_NORTH)) ),
    00320     ~( (1 << M(STR_SV_STNAME_SOUTH)) | (1 << M(STR_SV_STNAME_EAST)) | (1 << M(STR_SV_STNAME_NORTH)) ),
    00321     ~( (1 << M(STR_SV_STNAME_SOUTH)) | (1 << M(STR_SV_STNAME_WEST)) | (1 << M(STR_SV_STNAME_EAST)) ),
    00322   };
    00323
    00324   free_names &= _direction_and_table[
    00325     (TileX(tile) < TileX(t->xy)) +
    00326     (TileY(tile) < TileY(t->xy)) * 2];
    00327
    00328   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));
    00329   return (tmp == 0) ? STR_SV_STNAME_FALLBACK : (STR_SV_STNAME + FindFirstBit(tmp));
    00330 }
    00331 #undef M
    00332
    00338 static Station *GetClosestDeletedStation(TileIndex tile)
    00339 {
    00340   uint threshold = 8;
    00341   Station *best_station = NULL;
    00342   Station *st;
    00343
    00344   FOR_ALL_STATIONS(st) {
    00345     if (!st->IsInUse() && st->owner == _current_company) {
    00346       uint cur_dist = DistanceManhattan(tile, st->xy);
    00347
    00348       if (cur_dist < threshold) {
    00349         threshold = cur_dist;
    00350         best_station = st;
    00351       }
    00352     }
    00353   }
    00354
    00355   return best_station;
    00356 }
    00357
    00358
    00359 void Station::GetTileArea(TileArea *ta, StationType type) const
    00360 {
    00361   switch (type) {
    00362     case STATION_RAIL:
    00363       *ta = this->train_station;
    00364       return;
    00365
    00366     case STATION_AIRPORT:
    00367       *ta = this->airport;
    00368       return;
    00369
    00370     case STATION_TRUCK:
    00371       *ta = this->truck_station;
    00372       return;
    00373
    00374     case STATION_BUS:
    00375       *ta = this->bus_station;
    00376       return;
    00377
    00378     case STATION_DOCK:
    00379     case STATION_OILRIG:
    00380       ta->tile = this->dock_tile;
    00381       break;
    00382
    00383     default: NOT_REACHED();
    00384   }
    00385
    00386   ta->w = 1;
    00387   ta->h = 1;
    00388 }
    00389
    00393 void Station::UpdateVirtCoord()
    00394 {
    00395   Point pt = RemapCoords2(TileX(this->xy) * TILE_SIZE, TileY(this->xy) * TILE_SIZE);
    00396
    00397   pt.y -= 32;
    00398   if ((this->facilities & FACIL_AIRPORT) && this->airport.type == AT_OILRIG) pt.y -= 16;
    00399
    00400   SetDParam(0, this->index);
    00401   SetDParam(1, this->facilities);
    00402   this->sign.UpdatePosition(pt.x, pt.y, STR_VIEWPORT_STATION);
    00403
    00404   SetWindowDirty(WC_STATION_VIEW, this->index);
    00405 }
    00406
    00408 void UpdateAllStationVirtCoords()
    00409 {
    00410   BaseStation *st;
    00411
    00412   FOR_ALL_BASE_STATIONS(st) {
    00413     st->UpdateVirtCoord();
    00414   }
    00415 }
    00416
    00422 static uint GetAcceptanceMask(const Station *st)
    00423 {
    00424   uint mask = 0;
    00425
    00426   for (CargoID i = 0; i < NUM_CARGO; i++) {
    00427     if (HasBit(st->goods[i].acceptance_pickup, GoodsEntry::ACCEPTANCE)) mask |= 1 << i;
    00428   }
    00429   return mask;
    00430 }
    00431
    00436 static void ShowRejectOrAcceptNews(const Station *st, uint num_items, CargoID *cargo, StringID msg)
    00437 {
    00438   for (uint i = 0; i < num_items; i++) {
    00439     SetDParam(i + 1, CargoSpec::Get(cargo[i])->name);
    00440   }
    00441
    00442   SetDParam(0, st->index);
    00443   AddNewsItem(msg, NS_ACCEPTANCE, NR_STATION, st->index);
    00444 }
    00445
    00453 CargoArray GetProductionAroundTiles(TileIndex tile, int w, int h, int rad)
    00454 {
    00455   CargoArray produced;
    00456
    00457   int x = TileX(tile);
    00458   int y = TileY(tile);
    00459
    00460   /* expand the region by rad tiles on each side
    00461    * while making sure that we remain inside the board. */
    00462   int x2 = min(x + w + rad, MapSizeX());
    00463   int x1 = max(x - rad, 0);
    00464
    00465   int y2 = min(y + h + rad, MapSizeY());
    00466   int y1 = max(y - rad, 0);
    00467
    00468   assert(x1 < x2);
    00469   assert(y1 < y2);
    00470   assert(w > 0);
    00471   assert(h > 0);
    00472
    00473   TileArea ta(TileXY(x1, y1), TileXY(x2 - 1, y2 - 1));
    00474
    00475   /* Loop over all tiles to get the produced cargo of
    00476    * everything except industries */
    00477   TILE_AREA_LOOP(tile, ta) AddProducedCargo(tile, produced);
    00478
    00479   /* Loop over the industries. They produce cargo for
    00480    * anything that is within 'rad' from their bounding
    00481    * box. As such if you have e.g. a oil well the tile
    00482    * area loop might not hit an industry tile while
    00483    * the industry would produce cargo for the station.
    00484    */
    00485   const Industry *i;
    00486   FOR_ALL_INDUSTRIES(i) {
    00487     if (!ta.Intersects(i->location)) continue;
    00488
    00489     for (uint j = 0; j < lengthof(i->produced_cargo); j++) {
    00490       CargoID cargo = i->produced_cargo[j];
    00491       if (cargo != CT_INVALID) produced[cargo]++;
    00492     }
    00493   }
    00494
    00495   return produced;
    00496 }
    00497
    00506 CargoArray GetAcceptanceAroundTiles(TileIndex tile, int w, int h, int rad, uint32 *always_accepted)
    00507 {
    00508   CargoArray acceptance;
    00509   if (always_accepted != NULL) *always_accepted = 0;
    00510
    00511   int x = TileX(tile);
    00512   int y = TileY(tile);
    00513
    00514   /* expand the region by rad tiles on each side
    00515    * while making sure that we remain inside the board. */
    00516   int x2 = min(x + w + rad, MapSizeX());
    00517   int y2 = min(y + h + rad, MapSizeY());
    00518   int x1 = max(x - rad, 0);
    00519   int y1 = max(y - rad, 0);
    00520
    00521   assert(x1 < x2);
    00522   assert(y1 < y2);
    00523   assert(w > 0);
    00524   assert(h > 0);
    00525
    00526   for (int yc = y1; yc != y2; yc++) {
    00527     for (int xc = x1; xc != x2; xc++) {
    00528       TileIndex tile = TileXY(xc, yc);
    00529       AddAcceptedCargo(tile, acceptance, always_accepted);
    00530     }
    00531   }
    00532
    00533   return acceptance;
    00534 }
    00535
    00541 void UpdateStationAcceptance(Station *st, bool show_msg)
    00542 {
    00543   /* old accepted goods types */
    00544   uint old_acc = GetAcceptanceMask(st);
    00545
    00546   /* And retrieve the acceptance. */
    00547   CargoArray acceptance;
    00548   if (!st->rect.IsEmpty()) {
    00549     acceptance = GetAcceptanceAroundTiles(
    00550       TileXY(st->rect.left, st->rect.top),
    00551       st->rect.right  - st->rect.left + 1,
    00552       st->rect.bottom - st->rect.top  + 1,
    00553       st->GetCatchmentRadius(),
    00554       &st->always_accepted
    00555     );
    00556   }
    00557
    00558   /* Adjust in case our station only accepts fewer kinds of goods */
    00559   for (CargoID i = 0; i < NUM_CARGO; i++) {
    00560     uint amt = min(acceptance[i], 15);
    00561
    00562     /* Make sure the station can accept the goods type. */
    00563     bool is_passengers = IsCargoInClass(i, CC_PASSENGERS);
    00564     if ((!is_passengers && !(st->facilities & ~FACIL_BUS_STOP)) ||
    00565         (is_passengers && !(st->facilities & ~FACIL_TRUCK_STOP))) {
    00566       amt = 0;
    00567     }
    00568
    00569     SB(st->goods[i].acceptance_pickup, GoodsEntry::ACCEPTANCE, 1, amt >= 8);
    00570   }
    00571
    00572   /* Only show a message in case the acceptance was actually changed. */
    00573   uint new_acc = GetAcceptanceMask(st);
    00574   if (old_acc == new_acc) return;
    00575
    00576   /* show a message to report that the acceptance was changed? */
    00577   if (show_msg && st->owner == _local_company && st->IsInUse()) {
    00578     /* List of accept and reject strings for different number of
    00579      * cargo types */
    00580     static const StringID accept_msg[] = {
    00581       STR_NEWS_STATION_NOW_ACCEPTS_CARGO,
    00582       STR_NEWS_STATION_NOW_ACCEPTS_CARGO_AND_CARGO,
    00583     };
    00584     static const StringID reject_msg[] = {
    00585       STR_NEWS_STATION_NO_LONGER_ACCEPTS_CARGO,
    00586       STR_NEWS_STATION_NO_LONGER_ACCEPTS_CARGO_OR_CARGO,
    00587     };
    00588
    00589     /* Array of accepted and rejected cargo types */
    00590     CargoID accepts[2] = { CT_INVALID, CT_INVALID };
    00591     CargoID rejects[2] = { CT_INVALID, CT_INVALID };
    00592     uint num_acc = 0;
    00593     uint num_rej = 0;
    00594
    00595     /* Test each cargo type to see if its acceptange has changed */
    00596     for (CargoID i = 0; i < NUM_CARGO; i++) {
    00597       if (HasBit(new_acc, i)) {
    00598         if (!HasBit(old_acc, i) && num_acc < lengthof(accepts)) {
    00599           /* New cargo is accepted */
    00600           accepts[num_acc++] = i;
    00601         }
    00602       } else {
    00603         if (HasBit(old_acc, i) && num_rej < lengthof(rejects)) {
    00604           /* Old cargo is no longer accepted */
    00605           rejects[num_rej++] = i;
    00606         }
    00607       }
    00608     }
    00609
    00610     /* Show news message if there are any changes */
    00611     if (num_acc > 0) ShowRejectOrAcceptNews(st, num_acc, accepts, accept_msg[num_acc - 1]);
    00612     if (num_rej > 0) ShowRejectOrAcceptNews(st, num_rej, rejects, reject_msg[num_rej - 1]);
    00613   }
    00614
    00615   /* redraw the station view since acceptance changed */
    00616   SetWindowWidgetDirty(WC_STATION_VIEW, st->index, SVW_ACCEPTLIST);
    00617 }
    00618
    00619 static void UpdateStationSignCoord(BaseStation *st)
    00620 {
    00621   const StationRect *r = &st->rect;
    00622
    00623   if (r->IsEmpty()) return; // no tiles belong to this station
    00624
    00625   /* clamp sign coord to be inside the station rect */
    00626   st->xy = TileXY(ClampU(TileX(st->xy), r->left, r->right), ClampU(TileY(st->xy), r->top, r->bottom));
    00627   st->UpdateVirtCoord();
    00628 }
    00629
    00636 static void DeleteStationIfEmpty(BaseStation *st)
    00637 {
    00638   if (!st->IsInUse()) {
    00639     st->delete_ctr = 0;
    00640     InvalidateWindowData(WC_STATION_LIST, st->owner, 0);
    00641   }
    00642   /* station remains but it probably lost some parts - station sign should stay in the station boundaries */
    00643   UpdateStationSignCoord(st);
    00644 }
    00645
    00646 CommandCost ClearTile_Station(TileIndex tile, DoCommandFlag flags);
    00647
    00656 CommandCost CheckBuildableTile(TileIndex tile, uint invalid_dirs, int &allowed_z, bool check_bridge = true)
    00657 {
    00658   if (check_bridge && MayHaveBridgeAbove(tile) && IsBridgeAbove(tile)) {
    00659     return_cmd_error(STR_ERROR_MUST_DEMOLISH_BRIDGE_FIRST);
    00660   }
    00661
    00662   CommandCost ret = EnsureNoVehicleOnGround(tile);
    00663   if (ret.Failed()) return ret;
    00664
    00665   uint z;
    00666   Slope tileh = GetTileSlope(tile, &z);
    00667
    00668   /* Prohibit building if
    00669    *   1) The tile is "steep" (i.e. stretches two height levels).
    00670    *   2) The tile is non-flat and the build_on_slopes switch is disabled.
    00671    */
    00672   if (IsSteepSlope(tileh) ||
    00673       ((!_settings_game.construction.build_on_slopes) && tileh != SLOPE_FLAT)) {
    00674     return_cmd_error(STR_ERROR_FLAT_LAND_REQUIRED);
    00675   }
    00676
    00677   CommandCost cost(EXPENSES_CONSTRUCTION);
    00678   int flat_z = z;
    00679   if (tileh != SLOPE_FLAT) {
    00680     /* Forbid building if the tile faces a slope in a invalid direction. */
    00681     if ((HasBit(invalid_dirs, DIAGDIR_NE) && !(tileh & SLOPE_NE)) ||
    00682         (HasBit(invalid_dirs, DIAGDIR_SE) && !(tileh & SLOPE_SE)) ||
    00683         (HasBit(invalid_dirs, DIAGDIR_SW) && !(tileh & SLOPE_SW)) ||
    00684         (HasBit(invalid_dirs, DIAGDIR_NW) && !(tileh & SLOPE_NW))) {
    00685       return_cmd_error(STR_ERROR_FLAT_LAND_REQUIRED);
    00686     }
    00687     cost.AddCost(_price[PR_BUILD_FOUNDATION]);
    00688     flat_z += TILE_HEIGHT;
    00689   }
    00690
    00691   /* The level of this tile must be equal to allowed_z. */
    00692   if (allowed_z < 0) {
    00693     /* First tile. */
    00694     allowed_z = flat_z;
    00695   } else if (allowed_z != flat_z) {
    00696     return_cmd_error(STR_ERROR_FLAT_LAND_REQUIRED);
    00697   }
    00698
    00699   return cost;
    00700 }
    00701
    00708 CommandCost CheckFlatLand(TileArea tile_area, DoCommandFlag flags)
    00709 {
    00710   CommandCost cost(EXPENSES_CONSTRUCTION);
    00711   int allowed_z = -1;
    00712
    00713   TILE_AREA_LOOP(tile_cur, tile_area) {
    00714     CommandCost ret = CheckBuildableTile(tile_cur, 0, allowed_z);
    00715     if (ret.Failed()) return ret;
    00716     cost.AddCost(ret);
    00717
    00718     ret = DoCommand(tile_cur, 0, 0, flags, CMD_LANDSCAPE_CLEAR);
    00719     if (ret.Failed()) return ret;
    00720     cost.AddCost(ret);
    00721   }
    00722
    00723   return cost;
    00724 }
    00725
    00736 static CommandCost CheckFlatLandRailStation(TileArea tile_area, DoCommandFlag flags, uint invalid_dirs, StationID *station, RailType rt, SmallVector<Train *, 4> &affected_vehicles)
    00737 {
    00738   CommandCost cost(EXPENSES_CONSTRUCTION);
    00739   int allowed_z = -1;
    00740
    00741   TILE_AREA_LOOP(tile_cur, tile_area) {
    00742     CommandCost ret = CheckBuildableTile(tile_cur, invalid_dirs, allowed_z);
    00743     if (ret.Failed()) return ret;
    00744     cost.AddCost(ret);
    00745
    00746     /* if station is set, then we have special handling to allow building on top of already existing stations.
    00747      * so station points to INVALID_STATION if we can build on any station.
    00748      * Or it points to a station if we're only allowed to build on exactly that station. */
    00749     if (station != NULL && IsTileType(tile_cur, MP_STATION)) {
    00750       if (!IsRailStation(tile_cur)) {
    00751         return ClearTile_Station(tile_cur, DC_AUTO); // get error message
    00752       } else {
    00753         StationID st = GetStationIndex(tile_cur);
    00754         if (*station == INVALID_STATION) {
    00755           *station = st;
    00756         } else if (*station != st) {
    00757           return_cmd_error(STR_ERROR_ADJOINS_MORE_THAN_ONE_EXISTING);
    00758         }
    00759       }
    00760     } else {
    00761       /* Rail type is only valid when building a railway station; if station to
    00762        * build isn't a rail station it's INVALID_RAILTYPE. */
    00763       if (rt != INVALID_RAILTYPE &&
    00764           IsPlainRailTile(tile_cur) && !HasSignals(tile_cur) &&
    00765           HasPowerOnRail(GetRailType(tile_cur), rt)) {
    00766         /* Allow overbuilding if the tile:
    00767          *  - has rail, but no signals
    00768          *  - it has exactly one track
    00769          *  - the track is in line with the station
    00770          *  - the current rail type has power on the to-be-built type (e.g. convert normal rail to el rail)
    00771          */
    00772         TrackBits tracks = GetTrackBits(tile_cur);
    00773         Track track = RemoveFirstTrack(&tracks);
    00774         Track expected_track = HasBit(invalid_dirs, DIAGDIR_NE) ? TRACK_X : TRACK_Y;
    00775
    00776         if (tracks == TRACK_BIT_NONE && track == expected_track) {
    00777           /* Check for trains having a reservation for this tile. */
    00778           if (HasBit(GetRailReservationTrackBits(tile_cur), track)) {
    00779             Train *v = GetTrainForReservation(tile_cur, track);
    00780             if (v != NULL) {
    00781               *affected_vehicles.Append() = v;
    00782             }
    00783           }
    00784           CommandCost ret = DoCommand(tile_cur, 0, track, flags, CMD_REMOVE_SINGLE_RAIL);
    00785           if (ret.Failed()) return ret;
    00786           cost.AddCost(ret);
    00787           /* With flags & ~DC_EXEC CmdLandscapeClear would fail since the rail still exists */
    00788           continue;
    00789         }
    00790       }
    00791       ret = DoCommand(tile_cur, 0, 0, flags, CMD_LANDSCAPE_CLEAR);
    00792       if (ret.Failed()) return ret;
    00793       cost.AddCost(ret);
    00794     }
    00795   }
    00796
    00797   return cost;
    00798 }
    00799
    00812 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)
    00813 {
    00814   CommandCost cost(EXPENSES_CONSTRUCTION);
    00815   int allowed_z = -1;
    00816
    00817   TILE_AREA_LOOP(cur_tile, tile_area) {
    00818     CommandCost ret = CheckBuildableTile(cur_tile, invalid_dirs, allowed_z);
    00819     if (ret.Failed()) return ret;
    00820     cost.AddCost(ret);
    00821
    00822     /* If station is set, then we have special handling to allow building on top of already existing stations.
    00823      * Station points to INVALID_STATION if we can build on any station.
    00824      * Or it points to a station if we're only allowed to build on exactly that station. */
    00825     if (station != NULL && IsTileType(cur_tile, MP_STATION)) {
    00826       if (!IsRoadStop(cur_tile)) {
    00827         return ClearTile_Station(cur_tile, DC_AUTO); // Get error message.
    00828       } else {
    00829         if (is_truck_stop != IsTruckStop(cur_tile) ||
    00830             is_drive_through != IsDriveThroughStopTile(cur_tile)) {
    00831           return ClearTile_Station(cur_tile, DC_AUTO); // Get error message.
    00832         }
    00833         /* Drive-through station in the wrong direction. */
    00834         if (is_drive_through && IsDriveThroughStopTile(cur_tile) && DiagDirToAxis(GetRoadStopDir(cur_tile)) != axis){
    00835           return_cmd_error(STR_ERROR_DRIVE_THROUGH_DIRECTION);
    00836         }
    00837         StationID st = GetStationIndex(cur_tile);
    00838         if (*station == INVALID_STATION) {
    00839           *station = st;
    00840         } else if (*station != st) {
    00841           return_cmd_error(STR_ERROR_ADJOINS_MORE_THAN_ONE_EXISTING);
    00842         }
    00843       }
    00844     } else {
    00845       bool build_over_road = is_drive_through && IsNormalRoadTile(cur_tile);
    00846       /* Road bits in the wrong direction. */
    00847       RoadBits rb = IsNormalRoadTile(cur_tile) ? GetAllRoadBits(cur_tile) : ROAD_NONE;
    00848       if (build_over_road && (rb & (axis == AXIS_X ? ROAD_Y : ROAD_X)) != 0) {
    00849         /* Someone was pedantic and *NEEDED* three fracking different error messages. */
    00850         switch (CountBits(rb)) {
    00851           case 1:
    00852             return_cmd_error(STR_ERROR_DRIVE_THROUGH_DIRECTION);
    00853
    00854           case 2:
    00855             if (rb == ROAD_X || rb == ROAD_Y) return_cmd_error(STR_ERROR_DRIVE_THROUGH_DIRECTION);
    00856             return_cmd_error(STR_ERROR_DRIVE_THROUGH_CORNER);
    00857
    00858           default: // 3 or 4
    00859             return_cmd_error(STR_ERROR_DRIVE_THROUGH_JUNCTION);
    00860         }
    00861       }
    00862
    00863       RoadTypes cur_rts = IsNormalRoadTile(cur_tile) ? GetRoadTypes(cur_tile) : ROADTYPES_NONE;
    00864       uint num_roadbits = 0;
    00865       if (build_over_road) {
    00866         /* There is a road, check if we can build road+tram stop over it. */
    00867         if (HasBit(cur_rts, ROADTYPE_ROAD)) {
    00868           Owner road_owner = GetRoadOwner(cur_tile, ROADTYPE_ROAD);
    00869           if (road_owner == OWNER_TOWN) {
    00870             if (!_settings_game.construction.road_stop_on_town_road) return_cmd_error(STR_ERROR_DRIVE_THROUGH_ON_TOWN_ROAD);
    00871           } else if (!_settings_game.construction.road_stop_on_competitor_road && road_owner != OWNER_NONE) {
    00872             CommandCost ret = CheckOwnership(road_owner);
    00873             if (ret.Failed()) return ret;
    00874           }
    00875           num_roadbits += CountBits(GetRoadBits(cur_tile, ROADTYPE_ROAD));
    00876         }
    00877
    00878         /* There is a tram, check if we can build road+tram stop over it. */
    00879         if (HasBit(cur_rts, ROADTYPE_TRAM)) {
    00880           Owner tram_owner = GetRoadOwner(cur_tile, ROADTYPE_TRAM);
    00881           if (!_settings_game.construction.road_stop_on_competitor_road && tram_owner != OWNER_NONE) {
    00882             CommandCost ret = CheckOwnership(tram_owner);
    00883             if (ret.Failed()) return ret;
    00884           }
    00885           num_roadbits += CountBits(GetRoadBits(cur_tile, ROADTYPE_TRAM));
    00886         }
    00887
    00888         /* Take into account existing roadbits. */
    00889         rts |= cur_rts;
    00890       } else {
    00891         ret = DoCommand(cur_tile, 0, 0, flags, CMD_LANDSCAPE_CLEAR);
    00892         if (ret.Failed()) return ret;
    00893         cost.AddCost(ret);
    00894       }
    00895
    00896       uint roadbits_to_build = CountBits(rts) * 2 - num_roadbits;
    00897       cost.AddCost(_price[PR_BUILD_ROAD] * roadbits_to_build);
    00898     }
    00899   }
    00900
    00901   return cost;
    00902 }
    00903
    00911 CommandCost CanExpandRailStation(const BaseStation *st, TileArea &new_ta, Axis axis)
    00912 {
    00913   TileArea cur_ta = st->train_station;
    00914
    00915   /* determine new size of train station region.. */
    00916   int x = min(TileX(cur_ta.tile), TileX(new_ta.tile));
    00917   int y = min(TileY(cur_ta.tile), TileY(new_ta.tile));
    00918   new_ta.w = max(TileX(cur_ta.tile) + cur_ta.w, TileX(new_ta.tile) + new_ta.w) - x;
    00919   new_ta.h = max(TileY(cur_ta.tile) + cur_ta.h, TileY(new_ta.tile) + new_ta.h) - y;
    00920   new_ta.tile = TileXY(x, y);
    00921
    00922   /* make sure the final size is not too big. */
    00923   if (new_ta.w > _settings_game.station.station_spread || new_ta.h > _settings_game.station.station_spread) {
    00924     return_cmd_error(STR_ERROR_STATION_TOO_SPREAD_OUT);
    00925   }
    00926
    00927   return CommandCost();
    00928 }
    00929
    00930 static inline byte *CreateSingle(byte *layout, int n)
    00931 {
    00932   int i = n;
    00933   do *layout++ = 0; while (--i);
    00934   layout[((n - 1) >> 1) - n] = 2;
    00935   return layout;
    00936 }
    00937
    00938 static inline byte *CreateMulti(byte *layout, int n, byte b)
    00939 {
    00940   int i = n;
    00941   do *layout++ = b; while (--i);
    00942   if (n > 4) {
    00943     layout[0 - n] = 0;
    00944     layout[n - 1 - n] = 0;
    00945   }
    00946   return layout;
    00947 }
    00948
    00949 void GetStationLayout(byte *layout, int numtracks, int plat_len, const StationSpec *statspec)
    00950 {
    00951   if (statspec != NULL && statspec->lengths >= plat_len &&
    00952       statspec->platforms[plat_len - 1] >= numtracks &&
    00953       statspec->layouts[plat_len - 1][numtracks - 1]) {
    00954     /* Custom layout defined, follow it. */
    00955     memcpy(layout, statspec->layouts[plat_len - 1][numtracks - 1],
    00956       plat_len * numtracks);
    00957     return;
    00958   }
    00959
    00960   if (plat_len == 1) {
    00961     CreateSingle(layout, numtracks);
    00962   } else {
    00963     if (numtracks & 1) layout = CreateSingle(layout, plat_len);
    00964     numtracks >>= 1;
    00965
    00966     while (--numtracks >= 0) {
    00967       layout = CreateMulti(layout, plat_len, 4);
    00968       layout = CreateMulti(layout, plat_len, 6);
    00969     }
    00970   }
    00971 }
    00972
    00984 template <class T, StringID error_message>
    00985 CommandCost FindJoiningBaseStation(StationID existing_station, StationID station_to_join, bool adjacent, TileArea ta, T **st)
    00986 {
    00987   assert(*st == NULL);
    00988   bool check_surrounding = true;
    00989
    00990   if (_settings_game.station.adjacent_stations) {
    00991     if (existing_station != INVALID_STATION) {
    00992       if (adjacent && existing_station != station_to_join) {
    00993         /* You can't build an adjacent station over the top of one that
    00994          * already exists. */
    00995         return_cmd_error(error_message);
    00996       } else {
    00997         /* Extend the current station, and don't check whether it will
    00998          * be near any other stations. */
    00999         *st = T::GetIfValid(existing_station);
    01000         check_surrounding = (*st == NULL);
    01001       }
    01002     } else {
    01003       /* There's no station here. Don't check the tiles surrounding this
    01004        * one if the company wanted to build an adjacent station. */
    01005       if (adjacent) check_surrounding = false;
    01006     }
    01007   }
    01008
    01009   if (check_surrounding) {
    01010     /* Make sure there are no similar stations around us. */
    01011     CommandCost ret = GetStationAround(ta, existing_station, st);
    01012     if (ret.Failed()) return ret;
    01013   }
    01014
    01015   /* Distant join */
    01016   if (*st == NULL && station_to_join != INVALID_STATION) *st = T::GetIfValid(station_to_join);
    01017
    01018   return CommandCost();
    01019 }
    01020
    01030 static CommandCost FindJoiningStation(StationID existing_station, StationID station_to_join, bool adjacent, TileArea ta, Station **st)
    01031 {
    01032   return FindJoiningBaseStation<Station, STR_ERROR_MUST_REMOVE_RAILWAY_STATION_FIRST>(existing_station, station_to_join, adjacent, ta, st);
    01033 }
    01034
    01044 CommandCost FindJoiningWaypoint(StationID existing_waypoint, StationID waypoint_to_join, bool adjacent, TileArea ta, Waypoint **wp)
    01045 {
    01046   return FindJoiningBaseStation<Waypoint, STR_ERROR_MUST_REMOVE_RAILWAYPOINT_FIRST>(existing_waypoint, waypoint_to_join, adjacent, ta, wp);
    01047 }
    01048
    01066 CommandCost CmdBuildRailStation(TileIndex tile_org, DoCommandFlag flags, uint32 p1, uint32 p2, const char *text)
    01067 {
    01068   /* Unpack parameters */
    01069   RailType rt    = Extract<RailType, 0, 4>(p1);
    01070   Axis axis      = Extract<Axis, 4, 1>(p1);
    01071   byte numtracks = GB(p1,  8, 8);
    01072   byte plat_len  = GB(p1, 16, 8);
    01073   bool adjacent  = HasBit(p1, 24);
    01074
    01075   StationClassID spec_class = Extract<StationClassID, 0, 8>(p2);
    01076   byte spec_index           = GB(p2, 8, 8);
    01077   StationID station_to_join = GB(p2, 16, 16);
    01078
    01079   /* Does the authority allow this? */
    01080   CommandCost ret = CheckIfAuthorityAllowsNewStation(tile_org, flags);
    01081   if (ret.Failed()) return ret;
    01082
    01083   if (!ValParamRailtype(rt)) return CMD_ERROR;
    01084
    01085   /* Check if the given station class is valid */
    01086   if ((uint)spec_class >= StationClass::GetCount() || spec_class == STAT_CLASS_WAYP) return CMD_ERROR;
    01087   if (spec_index >= StationClass::GetCount(spec_class)) return CMD_ERROR;
    01088   if (plat_len == 0 || numtracks == 0) return CMD_ERROR;
    01089
    01090   int w_org, h_org;
    01091   if (axis == AXIS_X) {
    01092     w_org = plat_len;
    01093     h_org = numtracks;
    01094   } else {
    01095     h_org = plat_len;
    01096     w_org = numtracks;
    01097   }
    01098
    01099   bool reuse = (station_to_join != NEW_STATION);
    01100   if (!reuse) station_to_join = INVALID_STATION;
    01101   bool distant_join = (station_to_join != INVALID_STATION);
    01102
    01103   if (distant_join && (!_settings_game.station.distant_join_stations || !Station::IsValidID(station_to_join))) return CMD_ERROR;
    01104
    01105   if (h_org > _settings_game.station.station_spread || w_org > _settings_game.station.station_spread) return CMD_ERROR;
    01106
    01107   /* these values are those that will be stored in train_tile and station_platforms */
    01108   TileArea new_location(tile_org, w_org, h_org);
    01109
    01110   /* Make sure the area below consists of clear tiles. (OR tiles belonging to a certain rail station) */
    01111   StationID est = INVALID_STATION;
    01112   SmallVector<Train *, 4> affected_vehicles;
    01113   /* Clear the land below the station. */
    01114   CommandCost cost = CheckFlatLandRailStation(TileArea(tile_org, w_org, h_org), flags, 5 << axis, &est, rt, affected_vehicles);
    01115   if (cost.Failed()) return cost;
    01116   /* Add construction expenses. */
    01117   cost.AddCost((numtracks * _price[PR_BUILD_STATION_RAIL] + _price[PR_BUILD_STATION_RAIL_LENGTH]) * plat_len);
    01118   cost.AddCost(numtracks * plat_len * RailBuildCost(rt));
    01119
    01120   Station *st = NULL;
    01121   ret = FindJoiningStation(est, station_to_join, adjacent, new_location, &st);
    01122   if (ret.Failed()) return ret;
    01123
    01124   /* See if there is a deleted station close to us. */
    01125   if (st == NULL && reuse) st = GetClosestDeletedStation(tile_org);
    01126
    01127   if (st != NULL) {
    01128     /* Reuse an existing station. */
    01129     if (st->owner != _current_company) return_cmd_error(STR_ERROR_TOO_CLOSE_TO_ANOTHER_STATION);
    01130
    01131     if (st->train_station.tile != INVALID_TILE) {
    01132       CommandCost ret = CanExpandRailStation(st, new_location, axis);
    01133       if (ret.Failed()) return ret;
    01134     }
    01135
    01136     /* XXX can't we pack this in the "else" part of the if above? */
    01137     CommandCost ret = st->rect.BeforeAddRect(tile_org, w_org, h_org, StationRect::ADD_TEST);
    01138     if (ret.Failed()) return ret;
    01139   } else {
    01140     /* allocate and initialize new station */
    01141     if (!Station::CanAllocateItem()) return_cmd_error(STR_ERROR_TOO_MANY_STATIONS_LOADING);
    01142
    01143     if (flags & DC_EXEC) {
    01144       st = new Station(tile_org);
    01145
    01146       st->town = ClosestTownFromTile(tile_org, UINT_MAX);
    01147       st->string_id = GenerateStationName(st, tile_org, STATIONNAMING_RAIL);
    01148
    01149       if (Company::IsValidID(_current_company)) {
    01150         SetBit(st->town->have_ratings, _current_company);
    01151       }
    01152     }
    01153   }
    01154
    01155   /* Check if we can allocate a custom stationspec to this station */
    01156   const StationSpec *statspec = StationClass::Get(spec_class, spec_index);
    01157   int specindex = AllocateSpecToStation(statspec, st, (flags & DC_EXEC) != 0);
    01158   if (specindex == -1) return_cmd_error(STR_ERROR_TOO_MANY_STATION_SPECS);
    01159
    01160   if (statspec != NULL) {
    01161     /* Perform NewStation checks */
    01162
    01163     /* Check if the station size is permitted */
    01164     if (HasBit(statspec->disallowed_platforms, numtracks - 1) || HasBit(statspec->disallowed_lengths, plat_len - 1)) {
    01165       return CMD_ERROR;
    01166     }
    01167
    01168     /* Check if the station is buildable */
    01169     if (HasBit(statspec->callback_mask, CBM_STATION_AVAIL) && GB(GetStationCallback(CBID_STATION_AVAILABILITY, 0, 0, statspec, NULL, INVALID_TILE), 0, 8) == 0) {
    01170       return CMD_ERROR;
    01171     }
    01172   }
    01173
    01174   if (flags & DC_EXEC) {
    01175     TileIndexDiff tile_delta;
    01176     byte *layout_ptr;
    01177     byte numtracks_orig;
    01178     Track track;
    01179
    01180     st->train_station = new_location;
    01181     st->AddFacility(FACIL_TRAIN, new_location.tile);
    01182
    01183     st->rect.BeforeAddRect(tile_org, w_org, h_org, StationRect::ADD_TRY);
    01184
    01185     if (statspec != NULL) {
    01186       /* Include this station spec's animation trigger bitmask
    01187        * in the station's cached copy. */
    01188       st->cached_anim_triggers |= statspec->animation.triggers;
    01189     }
    01190
    01191     tile_delta = (axis == AXIS_X ? TileDiffXY(1, 0) : TileDiffXY(0, 1));
    01192     track = AxisToTrack(axis);
    01193
    01194     layout_ptr = AllocaM(byte, numtracks * plat_len);
    01195     GetStationLayout(layout_ptr, numtracks, plat_len, statspec);
    01196
    01197     numtracks_orig = numtracks;
    01198
    01199     do {
    01200       TileIndex tile = tile_org;
    01201       int w = plat_len;
    01202       do {
    01203         byte layout = *layout_ptr++;
    01204         if (IsRailStationTile(tile) && HasStationReservation(tile)) {
    01205           /* Check for trains having a reservation for this tile. */
    01206           Train *v = GetTrainForReservation(tile, AxisToTrack(GetRailStationAxis(tile)));
    01207           if (v != NULL) {
    01208             FreeTrainTrackReservation(v);
    01209             *affected_vehicles.Append() = v;
    01210             if (IsRailStationTile(v->tile)) SetRailStationPlatformReservation(v->tile, TrackdirToExitdir(v->GetVehicleTrackdir()), false);
    01211             for (; v->Next() != NULL; v = v->Next()) { }
    01212             if (IsRailStationTile(v->tile)) SetRailStationPlatformReservation(v->tile, TrackdirToExitdir(ReverseTrackdir(v->GetVehicleTrackdir())), false);
    01213           }
    01214         }
    01215
    01216         /* Remove animation if overbuilding */
    01217         DeleteAnimatedTile(tile);
    01218         byte old_specindex = HasStationTileRail(tile) ? GetCustomStationSpecIndex(tile) : 0;
    01219         MakeRailStation(tile, st->owner, st->index, axis, layout & ~1, rt);
    01220         /* Free the spec if we overbuild something */
    01221         DeallocateSpecFromStation(st, old_specindex);
    01222
    01223         SetCustomStationSpecIndex(tile, specindex);
    01224         SetStationTileRandomBits(tile, GB(Random(), 0, 4));
    01225         SetAnimationFrame(tile, 0);
    01226
    01227         if (statspec != NULL) {
    01228           /* Use a fixed axis for GetPlatformInfo as our platforms / numtracks are always the right way around */
    01229           uint32 platinfo = GetPlatformInfo(AXIS_X, 0, plat_len, numtracks_orig, plat_len - w, numtracks_orig - numtracks, false);
    01230
    01231           /* As the station is not yet completely finished, the station does not yet exist. */
    01232           uint16 callback = GetStationCallback(CBID_STATION_TILE_LAYOUT, platinfo, 0, statspec, NULL, tile);
    01233           if (callback != CALLBACK_FAILED && callback < 8) SetStationGfx(tile, (callback & ~1) + axis);
    01234
    01235           /* Trigger station animation -- after building? */
    01236           TriggerStationAnimation(st, tile, SAT_BUILT);
    01237         }
    01238
    01239         tile += tile_delta;
    01240       } while (--w);
    01241       AddTrackToSignalBuffer(tile_org, track, _current_company);
    01242       YapfNotifyTrackLayoutChange(tile_org, track);
    01243       tile_org += tile_delta ^ TileDiffXY(1, 1); // perpendicular to tile_delta
    01244     } while (--numtracks);
    01245
    01246     for (uint i = 0; i < affected_vehicles.Length(); ++i) {
    01247       /* Restore reservations of trains. */
    01248       Train *v = affected_vehicles[i];
    01249       if (IsRailStationTile(v->tile)) SetRailStationPlatformReservation(v->tile, TrackdirToExitdir(v->GetVehicleTrackdir()), true);
    01250       TryPathReserve(v, true, true);
    01251       for (; v->Next() != NULL; v = v->Next()) { }
    01252       if (IsRailStationTile(v->tile)) SetRailStationPlatformReservation(v->tile, TrackdirToExitdir(ReverseTrackdir(v->GetVehicleTrackdir())), true);
    01253     }
    01254
    01255     st->MarkTilesDirty(false);
    01256     st->UpdateVirtCoord();
    01257     UpdateStationAcceptance(st, false);
    01258     st->RecomputeIndustriesNear();
    01259     InvalidateWindowData(WC_SELECT_STATION, 0, 0);
    01260     InvalidateWindowData(WC_STATION_LIST, st->owner, 0);
    01261     SetWindowWidgetDirty(WC_STATION_VIEW, st->index, SVW_TRAINS);
    01262   }
    01263
    01264   return cost;
    01265 }
    01266
    01267 static void MakeRailStationAreaSmaller(BaseStation *st)
    01268 {
    01269   TileArea ta = st->train_station;
    01270
    01271 restart:
    01272
    01273   /* too small? */
    01274   if (ta.w != 0 && ta.h != 0) {
    01275     /* check the left side, x = constant, y changes */
    01276     for (uint i = 0; !st->TileBelongsToRailStation(ta.tile + TileDiffXY(0, i));) {
    01277       /* the left side is unused? */
    01278       if (++i == ta.h) {
    01279         ta.tile += TileDiffXY(1, 0);
    01280         ta.w--;
    01281         goto restart;
    01282       }
    01283     }
    01284
    01285     /* check the right side, x = constant, y changes */
    01286     for (uint i = 0; !st->TileBelongsToRailStation(ta.tile + TileDiffXY(ta.w - 1, i));) {
    01287       /* the right side is unused? */
    01288       if (++i == ta.h) {
    01289         ta.w--;
    01290         goto restart;
    01291       }
    01292     }
    01293
    01294     /* check the upper side, y = constant, x changes */
    01295     for (uint i = 0; !st->TileBelongsToRailStation(ta.tile + TileDiffXY(i, 0));) {
    01296       /* the left side is unused? */
    01297       if (++i == ta.w) {
    01298         ta.tile += TileDiffXY(0, 1);
    01299         ta.h--;
    01300         goto restart;
    01301       }
    01302     }
    01303
    01304     /* check the lower side, y = constant, x changes */
    01305     for (uint i = 0; !st->TileBelongsToRailStation(ta.tile + TileDiffXY(i, ta.h - 1));) {
    01306       /* the left side is unused? */
    01307       if (++i == ta.w) {
    01308         ta.h--;
    01309         goto restart;
    01310       }
    01311     }
    01312   } else {
    01313     ta.Clear();
    01314   }
    01315
    01316   st->train_station = ta;
    01317 }
    01318
    01329 template <class T>
    01330 CommandCost RemoveFromRailBaseStation(TileArea ta, SmallVector<T *, 4> &affected_stations, DoCommandFlag flags, Money removal_cost, bool keep_rail)
    01331 {
    01332   /* Count of the number of tiles removed */
    01333   int quantity = 0;
    01334   CommandCost total_cost(EXPENSES_CONSTRUCTION);
    01335
    01336   /* Do the action for every tile into the area */
    01337   TILE_AREA_LOOP(tile, ta) {
    01338     /* Make sure the specified tile is a rail station */
    01339     if (!HasStationTileRail(tile)) continue;
    01340
    01341     /* If there is a vehicle on ground, do not allow to remove (flood) the tile */
    01342     CommandCost ret = EnsureNoVehicleOnGround(tile);
    01343     if (ret.Failed()) continue;
    01344
    01345     /* Check ownership of station */
    01346     T *st = T::GetByTile(tile);
    01347     if (st == NULL) continue;
    01348
    01349     if (_current_company != OWNER_WATER) {
    01350       CommandCost ret = CheckOwnership(st->owner);
    01351       if (ret.Failed()) continue;
    01352     }
    01353
    01354     /* If we reached here, the tile is valid so increase the quantity of tiles we will remove */
    01355     quantity++;
    01356
    01357     if (keep_rail || IsStationTileBlocked(tile)) {
    01358       /* Don't refund the 'steel' of the track when we keep the
    01359        *  rail, or when the tile didn't have any rail at all. */
    01360       total_cost.AddCost(-_price[PR_CLEAR_RAIL]);
    01361     }
    01362
    01363     if (flags & DC_EXEC) {
    01364       /* read variables before the station tile is removed */
    01365       uint specindex = GetCustomStationSpecIndex(tile);
    01366       Track track = GetRailStationTrack(tile);
    01367       Owner owner = GetTileOwner(tile);
    01368       RailType rt = GetRailType(tile);
    01369       Train *v = NULL;
    01370
    01371       if (HasStationReservation(tile)) {
    01372         v = GetTrainForReservation(tile, track);
    01373         if (v != NULL) {
    01374           /* Free train reservation. */
    01375           FreeTrainTrackReservation(v);
    01376           if (IsRailStationTile(v->tile)) SetRailStationPlatformReservation(v->tile, TrackdirToExitdir(v->GetVehicleTrackdir()), false);
    01377           Vehicle *temp = v;
    01378           for (; temp->Next() != NULL; temp = temp->Next()) { }
    01379           if (IsRailStationTile(temp->tile)) SetRailStationPlatformReservation(temp->tile, TrackdirToExitdir(ReverseTrackdir(temp->GetVehicleTrackdir())), false);
    01380         }
    01381       }
    01382
    01383       bool build_rail = keep_rail && !IsStationTileBlocked(tile);
    01384
    01385       DoClearSquare(tile);
    01386       DeleteNewGRFInspectWindow(GSF_STATIONS, tile);
    01387       if (build_rail) MakeRailNormal(tile, owner, TrackToTrackBits(track), rt);
    01388
    01389       st->rect.AfterRemoveTile(st, tile);
    01390       AddTrackToSignalBuffer(tile, track, owner);
    01391       YapfNotifyTrackLayoutChange(tile, track);
    01392
    01393       DeallocateSpecFromStation(st, specindex);
    01394
    01395       affected_stations.Include(st);
    01396
    01397       if (v != NULL) {
    01398         /* Restore station reservation. */
    01399         if (IsRailStationTile(v->tile)) SetRailStationPlatformReservation(v->tile, TrackdirToExitdir(v->GetVehicleTrackdir()), true);
    01400         TryPathReserve(v, true, true);
    01401         for (; v->Next() != NULL; v = v->Next()) { }
    01402         if (IsRailStationTile(v->tile)) SetRailStationPlatformReservation(v->tile, TrackdirToExitdir(ReverseTrackdir(v->GetVehicleTrackdir())), true);
    01403       }
    01404     }
    01405   }
    01406
    01407   if (quantity == 0) return_cmd_error(STR_ERROR_THERE_IS_NO_STATION);
    01408
    01409   for (T **stp = affected_stations.Begin(); stp != affected_stations.End(); stp++) {
    01410     T *st = *stp;
    01411
    01412     /* now we need to make the "spanned" area of the railway station smaller
    01413      * if we deleted something at the edges.
    01414      * we also need to adjust train_tile. */
    01415     MakeRailStationAreaSmaller(st);
    01416     UpdateStationSignCoord(st);
    01417
    01418     /* if we deleted the whole station, delete the train facility. */
    01419     if (st->train_station.tile == INVALID_TILE) {
    01420       st->facilities &= ~FACIL_TRAIN;
    01421       SetWindowWidgetDirty(WC_STATION_VIEW, st->index, SVW_TRAINS);
    01422       st->UpdateVirtCoord();
    01423       DeleteStationIfEmpty(st);
    01424     }
    01425   }
    01426
    01427   total_cost.AddCost(quantity * removal_cost);
    01428   return total_cost;
    01429 }
    01430
    01442 CommandCost CmdRemoveFromRailStation(TileIndex start, DoCommandFlag flags, uint32 p1, uint32 p2, const char *text)
    01443 {
    01444   TileIndex end = p1 == 0 ? start : p1;
    01445   if (start >= MapSize() || end >= MapSize()) return CMD_ERROR;
    01446
    01447   TileArea ta(start, end);
    01448   SmallVector<Station *, 4> affected_stations;
    01449
    01450   CommandCost ret = RemoveFromRailBaseStation(ta, affected_stations, flags, _price[PR_CLEAR_STATION_RAIL], HasBit(p2, 0));
    01451   if (ret.Failed()) return ret;
    01452
    01453   /* Do all station specific functions here. */
    01454   for (Station **stp = affected_stations.Begin(); stp != affected_stations.End(); stp++) {
    01455     Station *st = *stp;
    01456
    01457     if (st->train_station.tile == INVALID_TILE) SetWindowWidgetDirty(WC_STATION_VIEW, st->index, SVW_TRAINS);
    01458     st->MarkTilesDirty(false);
    01459     st->RecomputeIndustriesNear();
    01460   }
    01461
    01462   /* Now apply the rail cost to the number that we deleted */
    01463   return ret;
    01464 }
    01465
    01477 CommandCost CmdRemoveFromRailWaypoint(TileIndex start, DoCommandFlag flags, uint32 p1, uint32 p2, const char *text)
    01478 {
    01479   TileIndex end = p1 == 0 ? start : p1;
    01480   if (start >= MapSize() || end >= MapSize()) return CMD_ERROR;
    01481
    01482   TileArea ta(start, end);
    01483   SmallVector<Waypoint *, 4> affected_stations;
    01484
    01485   return RemoveFromRailBaseStation(ta, affected_stations, flags, _price[PR_CLEAR_WAYPOINT_RAIL], HasBit(p2, 0));
    01486 }
    01487
    01488
    01496 template <class T>
    01497 CommandCost RemoveRailStation(T *st, DoCommandFlag flags)
    01498 {
    01499   /* Current company owns the station? */
    01500   if (_current_company != OWNER_WATER) {
    01501     CommandCost ret = CheckOwnership(st->owner);
    01502     if (ret.Failed()) return ret;
    01503   }
    01504
    01505   /* determine width and height of platforms */
    01506   TileArea ta = st->train_station;
    01507
    01508   assert(ta.w != 0 && ta.h != 0);
    01509
    01510   CommandCost cost(EXPENSES_CONSTRUCTION);
    01511   /* clear all areas of the station */
    01512   TILE_AREA_LOOP(tile, ta) {
    01513     /* only remove tiles that are actually train station tiles */
    01514     if (!st->TileBelongsToRailStation(tile)) continue;
    01515
    01516     CommandCost ret = EnsureNoVehicleOnGround(tile);
    01517     if (ret.Failed()) return ret;
    01518
    01519     cost.AddCost(_price[PR_CLEAR_STATION_RAIL]);
    01520     if (flags & DC_EXEC) {
    01521       /* read variables before the station tile is removed */
    01522       Track track = GetRailStationTrack(tile);
    01523       Owner owner = GetTileOwner(tile); // _current_company can be OWNER_WATER
    01524       Train *v = NULL;
    01525       if (HasStationReservation(tile)) {
    01526         v = GetTrainForReservation(tile, track);
    01527         if (v != NULL) FreeTrainTrackReservation(v);
    01528       }
    01529       DoClearSquare(tile);
    01530       DeleteNewGRFInspectWindow(GSF_STATIONS, tile);
    01531       AddTrackToSignalBuffer(tile, track, owner);
    01532       YapfNotifyTrackLayoutChange(tile, track);
    01533       if (v != NULL) TryPathReserve(v, true);
    01534     }
    01535   }
    01536
    01537   if (flags & DC_EXEC) {
    01538     st->rect.AfterRemoveRect(st, st->train_station);
    01539
    01540     st->train_station.Clear();
    01541
    01542     st->facilities &= ~FACIL_TRAIN;
    01543
    01544     free(st->speclist);
    01545     st->num_specs = 0;
    01546     st->speclist  = NULL;
    01547     st->cached_anim_triggers = 0;
    01548
    01549     SetWindowWidgetDirty(WC_STATION_VIEW, st->index, SVW_TRAINS);
    01550     st->UpdateVirtCoord();
    01551     DeleteStationIfEmpty(st);
    01552   }
    01553
    01554   return cost;
    01555 }
    01556
    01563 static CommandCost RemoveRailStation(TileIndex tile, DoCommandFlag flags)
    01564 {
    01565   /* if there is flooding, remove platforms tile by tile */
    01566   if (_current_company == OWNER_WATER) {
    01567     return DoCommand(tile, 0, 0, DC_EXEC, CMD_REMOVE_FROM_RAIL_STATION);
    01568   }
    01569
    01570   Station *st = Station::GetByTile(tile);
    01571   CommandCost cost = RemoveRailStation(st, flags);
    01572
    01573   if (flags & DC_EXEC) st->RecomputeIndustriesNear();
    01574
    01575   return cost;
    01576 }
    01577
    01584 static CommandCost RemoveRailWaypoint(TileIndex tile, DoCommandFlag flags)
    01585 {
    01586   /* if there is flooding, remove waypoints tile by tile */
    01587   if (_current_company == OWNER_WATER) {
    01588     return DoCommand(tile, 0, 0, DC_EXEC, CMD_REMOVE_FROM_RAIL_WAYPOINT);
    01589   }
    01590
    01591   return RemoveRailStation(Waypoint::GetByTile(tile), flags);
    01592 }
    01593
    01594
    01600 static RoadStop **FindRoadStopSpot(bool truck_station, Station *st)
    01601 {
    01602   RoadStop **primary_stop = (truck_station) ? &st->truck_stops : &st->bus_stops;
    01603
    01604   if (*primary_stop == NULL) {
    01605     /* we have no roadstop of the type yet, so write a "primary stop" */
    01606     return primary_stop;
    01607   } else {
    01608     /* there are stops already, so append to the end of the list */
    01609     RoadStop *stop = *primary_stop;
    01610     while (stop->next != NULL) stop = stop->next;
    01611     return &stop->next;
    01612   }
    01613 }
    01614
    01615 static CommandCost RemoveRoadStop(TileIndex tile, DoCommandFlag flags);
    01616
    01626 static CommandCost FindJoiningRoadStop(StationID existing_stop, StationID station_to_join, bool adjacent, TileArea ta, Station **st)
    01627 {
    01628   return FindJoiningBaseStation<Station, STR_ERROR_MUST_REMOVE_ROAD_STOP_FIRST>(existing_stop, station_to_join, adjacent, ta, st);
    01629 }
    01630
    01646 CommandCost CmdBuildRoadStop(TileIndex tile, DoCommandFlag flags, uint32 p1, uint32 p2, const char *text)
    01647 {
    01648   bool type = HasBit(p2, 0);
    01649   bool is_drive_through = HasBit(p2, 1);
    01650   RoadTypes rts = Extract<RoadTypes, 2, 2>(p2);
    01651   StationID station_to_join = GB(p2, 16, 16);
    01652   bool reuse = (station_to_join != NEW_STATION);
    01653   if (!reuse) station_to_join = INVALID_STATION;
    01654   bool distant_join = (station_to_join != INVALID_STATION);
    01655
    01656   uint8 width = (uint8)GB(p1, 0, 8);
    01657   uint8 lenght = (uint8)GB(p1, 8, 8);
    01658
    01659   /* Check if the requested road stop is too big */
    01660   if (width > _settings_game.station.station_spread || lenght > _settings_game.station.station_spread) return_cmd_error(STR_ERROR_STATION_TOO_SPREAD_OUT);
    01661   /* Check for incorrect width / lenght. */
    01662   if (width == 0 || lenght == 0) return CMD_ERROR;
    01663   /* Check if the first tile and the last tile are valid */
    01664   if (!IsValidTile(tile) || TileAddWrap(tile, width - 1, lenght - 1) == INVALID_TILE) return CMD_ERROR;
    01665
    01666   TileArea roadstop_area(tile, width, lenght);
    01667
    01668   if (distant_join && (!_settings_game.station.distant_join_stations || !Station::IsValidID(station_to_join))) return CMD_ERROR;
    01669
    01670   if (!HasExactlyOneBit(rts) || !HasRoadTypesAvail(_current_company, rts)) return CMD_ERROR;
    01671
    01672   /* Trams only have drive through stops */
    01673   if (!is_drive_through && HasBit(rts, ROADTYPE_TRAM)) return CMD_ERROR;
    01674
    01675   DiagDirection ddir = Extract<DiagDirection, 6, 2>(p2);
    01676
    01677   /* Safeguard the parameters. */
    01678   if (!IsValidDiagDirection(ddir)) return CMD_ERROR;
    01679   /* If it is a drive-through stop, check for valid axis. */
    01680   if (is_drive_through && !IsValidAxis((Axis)ddir)) return CMD_ERROR;
    01681
    01682   CommandCost ret = CheckIfAuthorityAllowsNewStation(tile, flags);
    01683   if (ret.Failed()) return ret;
    01684
    01685   /* Total road stop cost. */
    01686   CommandCost cost(EXPENSES_CONSTRUCTION, roadstop_area.w * roadstop_area.h * _price[type ? PR_BUILD_STATION_TRUCK : PR_BUILD_STATION_BUS]);
    01687   StationID est = INVALID_STATION;
    01688   ret = CheckFlatLandRoadStop(roadstop_area, flags, is_drive_through ? 5 << ddir : 1 << ddir, is_drive_through, type, DiagDirToAxis(ddir), &est, rts);
    01689   if (ret.Failed()) return ret;
    01690   cost.AddCost(ret);
    01691
    01692   Station *st = NULL;
    01693   ret = FindJoiningRoadStop(est, station_to_join, HasBit(p2, 5), roadstop_area, &st);
    01694   if (ret.Failed()) return ret;
    01695
    01696   /* Find a deleted station close to us */
    01697   if (st == NULL && reuse) st = GetClosestDeletedStation(tile);
    01698
    01699   /* Check if this number of road stops can be allocated. */
    01700   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);
    01701
    01702   if (st != NULL) {
    01703     if (st->owner != _current_company) {
    01704       return_cmd_error(STR_ERROR_TOO_CLOSE_TO_ANOTHER_STATION);
    01705     }
    01706
    01707     CommandCost ret = st->rect.BeforeAddRect(roadstop_area.tile, roadstop_area.w, roadstop_area.h, StationRect::ADD_TEST);
    01708     if (ret.Failed()) return ret;
    01709   } else {
    01710     /* allocate and initialize new station */
    01711     if (!Station::CanAllocateItem()) return_cmd_error(STR_ERROR_TOO_MANY_STATIONS_LOADING);
    01712
    01713     if (flags & DC_EXEC) {
    01714       st = new Station(tile);
    01715
    01716       st->town = ClosestTownFromTile(tile, UINT_MAX);
    01717       st->string_id = GenerateStationName(st, tile, STATIONNAMING_ROAD);
    01718
    01719       if (Company::IsValidID(_current_company)) {
    01720         SetBit(st->town->have_ratings, _current_company);
    01721       }
    01722     }
    01723   }
    01724
    01725   if (flags & DC_EXEC) {
    01726     /* Check every tile in the area. */
    01727     TILE_AREA_LOOP(cur_tile, roadstop_area) {
    01728       RoadTypes cur_rts = GetRoadTypes(cur_tile);
    01729       Owner road_owner = HasBit(cur_rts, ROADTYPE_ROAD) ? GetRoadOwner(cur_tile, ROADTYPE_ROAD) : _current_company;
    01730       Owner tram_owner = HasBit(cur_rts, ROADTYPE_TRAM) ? GetRoadOwner(cur_tile, ROADTYPE_TRAM) : _current_company;
    01731
    01732       if (IsTileType(cur_tile, MP_STATION) && IsRoadStop(cur_tile)) {
    01733         RemoveRoadStop(cur_tile, flags);
    01734       }
    01735
    01736       RoadStop *road_stop = new RoadStop(cur_tile);
    01737       /* Insert into linked list of RoadStops. */
    01738       RoadStop **currstop = FindRoadStopSpot(type, st);
    01739       *currstop = road_stop;
    01740
    01741       if (type) {
    01742         st->truck_station.Add(cur_tile);
    01743       } else {
    01744         st->bus_station.Add(cur_tile);
    01745       }
    01746
    01747       /* Initialize an empty station. */
    01748       st->AddFacility((type) ? FACIL_TRUCK_STOP : FACIL_BUS_STOP, cur_tile);
    01749
    01750       st->rect.BeforeAddTile(cur_tile, StationRect::ADD_TRY);
    01751
    01752       RoadStopType rs_type = type ? ROADSTOP_TRUCK : ROADSTOP_BUS;
    01753       if (is_drive_through) {
    01754         MakeDriveThroughRoadStop(cur_tile, st->owner, road_owner, tram_owner, st->index, rs_type, rts | cur_rts, DiagDirToAxis(ddir));
    01755         road_stop->MakeDriveThrough();
    01756       } else {
    01757         MakeRoadStop(cur_tile, st->owner, st->index, rs_type, rts, ddir);
    01758       }
    01759
    01760       MarkTileDirtyByTile(cur_tile);
    01761     }
    01762   }
    01763
    01764   if (st != NULL) {
    01765     st->UpdateVirtCoord();
    01766     UpdateStationAcceptance(st, false);
    01767     st->RecomputeIndustriesNear();
    01768     InvalidateWindowData(WC_SELECT_STATION, 0, 0);
    01769     InvalidateWindowData(WC_STATION_LIST, st->owner, 0);
    01770     SetWindowWidgetDirty(WC_STATION_VIEW, st->index, SVW_ROADVEHS);
    01771   }
    01772   return cost;
    01773 }
    01774
    01775
    01776 static Vehicle *ClearRoadStopStatusEnum(Vehicle *v, void *)
    01777 {
    01778   if (v->type == VEH_ROAD) {
    01779     /* Okay... we are a road vehicle on a drive through road stop.
    01780      * But that road stop has just been removed, so we need to make
    01781      * sure we are in a valid state... however, vehicles can also
    01782      * turn on road stop tiles, so only clear the 'road stop' state
    01783      * bits and only when the state was 'in road stop', otherwise
    01784      * we'll end up clearing the turn around bits. */
    01785     RoadVehicle *rv = RoadVehicle::From(v);
    01786     if (HasBit(rv->state, RVS_IN_DT_ROAD_STOP)) rv->state &= RVSB_ROAD_STOP_TRACKDIR_MASK;
    01787   }
    01788
    01789   return NULL;
    01790 }
    01791
    01792
    01799 static CommandCost RemoveRoadStop(TileIndex tile, DoCommandFlag flags)
    01800 {
    01801   Station *st = Station::GetByTile(tile);
    01802
    01803   if (_current_company != OWNER_WATER) {
    01804     CommandCost ret = CheckOwnership(st->owner);
    01805     if (ret.Failed()) return ret;
    01806   }
    01807
    01808   bool is_truck = IsTruckStop(tile);
    01809
    01810   RoadStop **primary_stop;
    01811   RoadStop *cur_stop;
    01812   if (is_truck) { // truck stop
    01813     primary_stop = &st->truck_stops;
    01814     cur_stop = RoadStop::GetByTile(tile, ROADSTOP_TRUCK);
    01815   } else {
    01816     primary_stop = &st->bus_stops;
    01817     cur_stop = RoadStop::GetByTile(tile, ROADSTOP_BUS);
    01818   }
    01819
    01820   assert(cur_stop != NULL);
    01821
    01822   /* don't do the check for drive-through road stops when company bankrupts */
    01823   if (IsDriveThroughStopTile(tile) && (flags & DC_BANKRUPT)) {
    01824     /* remove the 'going through road stop' status from all vehicles on that tile */
    01825     if (flags & DC_EXEC) FindVehicleOnPos(tile, NULL, &ClearRoadStopStatusEnum);
    01826   } else {
    01827     CommandCost ret = EnsureNoVehicleOnGround(tile);
    01828     if (ret.Failed()) return ret;
    01829   }
    01830
    01831   if (flags & DC_EXEC) {
    01832     if (*primary_stop == cur_stop) {
    01833       /* removed the first stop in the list */
    01834       *primary_stop = cur_stop->next;
    01835       /* removed the only stop? */
    01836       if (*primary_stop == NULL) {
    01837         st->facilities &= (is_truck ? ~FACIL_TRUCK_STOP : ~FACIL_BUS_STOP);
    01838       }
    01839     } else {
    01840       /* tell the predecessor in the list to skip this stop */
    01841       RoadStop *pred = *primary_stop;
    01842       while (pred->next != cur_stop) pred = pred->next;
    01843       pred->next = cur_stop->next;
    01844     }
    01845
    01846     if (IsDriveThroughStopTile(tile)) {
    01847       /* Clears the tile for us */
    01848       cur_stop->ClearDriveThrough();
    01849     } else {
    01850       DoClearSquare(tile);
    01851     }
    01852
    01853     SetWindowWidgetDirty(WC_STATION_VIEW, st->index, SVW_ROADVEHS);
    01854     delete cur_stop;
    01855
    01856     /* Make sure no vehicle is going to the old roadstop */
    01857     RoadVehicle *v;
    01858     FOR_ALL_ROADVEHICLES(v) {
    01859       if (v->First() == v && v->current_order.IsType(OT_GOTO_STATION) &&
    01860           v->dest_tile == tile) {
    01861         v->dest_tile = v->GetOrderStationLocation(st->index);
    01862       }
    01863     }
    01864
    01865     st->rect.AfterRemoveTile(st, tile);
    01866
    01867     st->UpdateVirtCoord();
    01868     st->RecomputeIndustriesNear();
    01869     DeleteStationIfEmpty(st);
    01870
    01871     /* Update the tile area of the truck/bus stop */
    01872     if (is_truck) {
    01873       st->truck_station.Clear();
    01874       for (const RoadStop *rs = st->truck_stops; rs != NULL; rs = rs->next) st->truck_station.Add(rs->xy);
    01875     } else {
    01876       st->bus_station.Clear();
    01877       for (const RoadStop *rs = st->bus_stops; rs != NULL; rs = rs->next) st->bus_station.Add(rs->xy);
    01878     }
    01879   }
    01880
    01881   return CommandCost(EXPENSES_CONSTRUCTION, _price[is_truck ? PR_CLEAR_STATION_TRUCK : PR_CLEAR_STATION_BUS]);
    01882 }
    01883
    01894 CommandCost CmdRemoveRoadStop(TileIndex tile, DoCommandFlag flags, uint32 p1, uint32 p2, const char *text)
    01895 {
    01896   uint8 width = (uint8)GB(p1, 0, 8);
    01897   uint8 height = (uint8)GB(p1, 8, 8);
    01898
    01899   /* Check for incorrect width / height. */
    01900   if (width == 0 || height == 0) return CMD_ERROR;
    01901   /* Check if the first tile and the last tile are valid */
    01902   if (!IsValidTile(tile) || TileAddWrap(tile, width - 1, height - 1) == INVALID_TILE) return CMD_ERROR;
    01903
    01904   TileArea roadstop_area(tile, width, height);
    01905
    01906   int quantity = 0;
    01907   CommandCost cost(EXPENSES_CONSTRUCTION);
    01908   TILE_AREA_LOOP(cur_tile, roadstop_area) {
    01909     /* Make sure the specified tile is a road stop of the correct type */
    01910     if (!IsTileType(cur_tile, MP_STATION) || !IsRoadStop(cur_tile) || (uint32)GetRoadStopType(cur_tile) != GB(p2, 0, 1)) continue;
    01911
    01912     /* Save the stop info before it is removed */
    01913     bool is_drive_through = IsDriveThroughStopTile(cur_tile);
    01914     RoadTypes rts = GetRoadTypes(cur_tile);
    01915     RoadBits road_bits = IsDriveThroughStopTile(cur_tile) ?
    01916         ((GetRoadStopDir(cur_tile) == DIAGDIR_NE) ? ROAD_X : ROAD_Y) :
    01917         DiagDirToRoadBits(GetRoadStopDir(cur_tile));
    01918
    01919     Owner road_owner = GetRoadOwner(cur_tile, ROADTYPE_ROAD);
    01920     Owner tram_owner = GetRoadOwner(cur_tile, ROADTYPE_TRAM);
    01921     CommandCost ret = RemoveRoadStop(cur_tile, flags);
    01922     if (ret.Failed()) return ret;
    01923     cost.AddCost(ret);
    01924
    01925     quantity++;
    01926     /* If the stop was a drive-through stop replace the road */
    01927     if ((flags & DC_EXEC) && is_drive_through) {
    01928       MakeRoadNormal(cur_tile, road_bits, rts, ClosestTownFromTile(cur_tile, UINT_MAX)->index,
    01929           road_owner, tram_owner);
    01930     }
    01931   }
    01932
    01933   if (quantity == 0) return_cmd_error(STR_ERROR_THERE_IS_NO_STATION);
    01934
    01935   return cost;
    01936 }
    01937
    01945 static uint GetMinimalAirportDistanceToTile(const AirportSpec *as, TileIndex town_tile, TileIndex airport_tile)
    01946 {
    01947   uint ttx = TileX(town_tile); // X, Y of town
    01948   uint tty = TileY(town_tile);
    01949
    01950   uint atx = TileX(airport_tile); // X, Y of northern airport corner
    01951   uint aty = TileY(airport_tile);
    01952
    01953   uint btx = TileX(airport_tile) + as->size_x - 1; // X, Y of southern corner
    01954   uint bty = TileY(airport_tile) + as->size_y - 1;
    01955
    01956   /* if ttx < atx, dx = atx - ttx
    01957    * if atx <= ttx <= btx, dx = 0
    01958    * else, dx = ttx - btx (similiar for dy) */
    01959   uint dx = ttx < atx ? atx - ttx : (ttx <= btx ? 0 : ttx - btx);
    01960   uint dy = tty < aty ? aty - tty : (tty <= bty ? 0 : tty - bty);
    01961
    01962   return dx + dy;
    01963 }
    01964
    01974 uint8 GetAirportNoiseLevelForTown(const AirportSpec *as, TileIndex town_tile, TileIndex tile)
    01975 {
    01976   /* 0 cannot be accounted, and 1 is the lowest that can be reduced from town.
    01977    * So no need to go any further*/
    01978   if (as->noise_level < 2) return as->noise_level;
    01979
    01980   uint distance = GetMinimalAirportDistanceToTile(as, town_tile, tile);
    01981
    01982   /* The steps for measuring noise reduction are based on the "magical" (and arbitrary) 8 base distance
    01983    * adding the town_council_tolerance 4 times, as a way to graduate, depending of the tolerance.
    01984    * Basically, it says that the less tolerant a town is, the bigger the distance before
    01985    * an actual decrease can be granted */
    01986   uint8 town_tolerance_distance = 8 + (_settings_game.difficulty.town_council_tolerance * 4);
    01987
    01988   /* now, we want to have the distance segmented using the distance judged bareable by town
    01989    * This will give us the coefficient of reduction the distance provides. */
    01990   uint noise_reduction = distance / town_tolerance_distance;
    01991
    01992   /* If the noise reduction equals the airport noise itself, don't give it for free.
    01993    * Otherwise, simply reduce the airport's level. */
    01994   return noise_reduction >= as->noise_level ? 1 : as->noise_level - noise_reduction;
    01995 }
    01996
    02004 Town *AirportGetNearestTown(const AirportSpec *as, TileIndex airport_tile)
    02005 {
    02006   Town *t, *nearest = NULL;
    02007   uint add = as->size_x + as->size_y - 2; // GetMinimalAirportDistanceToTile can differ from DistanceManhattan by this much
    02008   uint mindist = UINT_MAX - add; // prevent overflow
    02009   FOR_ALL_TOWNS(t) {
    02010     if (DistanceManhattan(t->xy, airport_tile) < mindist + add) { // avoid calling GetMinimalAirportDistanceToTile too often
    02011       uint dist = GetMinimalAirportDistanceToTile(as, t->xy, airport_tile);
    02012       if (dist < mindist) {
    02013         nearest = t;
    02014         mindist = dist;
    02015       }
    02016     }
    02017   }
    02018
    02019   return nearest;
    02020 }
    02021
    02022
    02024 void UpdateAirportsNoise()
    02025 {
    02026   Town *t;
    02027   const Station *st;
    02028
    02029   FOR_ALL_TOWNS(t) t->noise_reached = 0;
    02030
    02031   FOR_ALL_STATIONS(st) {
    02032     if (st->airport.tile != INVALID_TILE) {
    02033       const AirportSpec *as = st->airport.GetSpec();
    02034       Town *nearest = AirportGetNearestTown(as, st->airport.tile);
    02035       nearest->noise_reached += GetAirportNoiseLevelForTown(as, nearest->xy, st->airport.tile);
    02036     }
    02037   }
    02038 }
    02039
    02053 CommandCost CmdBuildAirport(TileIndex tile, DoCommandFlag flags, uint32 p1, uint32 p2, const char *text)
    02054 {
    02055   StationID station_to_join = GB(p2, 16, 16);
    02056   bool reuse = (station_to_join != NEW_STATION);
    02057   if (!reuse) station_to_join = INVALID_STATION;
    02058   bool distant_join = (station_to_join != INVALID_STATION);
    02059   byte airport_type = GB(p1, 0, 8);
    02060   byte layout = GB(p1, 8, 8);
    02061
    02062   if (distant_join && (!_settings_game.station.distant_join_stations || !Station::IsValidID(station_to_join))) return CMD_ERROR;
    02063
    02064   if (airport_type >= NUM_AIRPORTS) return CMD_ERROR;
    02065
    02066   CommandCost ret = CheckIfAuthorityAllowsNewStation(tile, flags);
    02067   if (ret.Failed()) return ret;
    02068
    02069   /* Check if a valid, buildable airport was chosen for construction */
    02070   const AirportSpec *as = AirportSpec::Get(airport_type);
    02071   if (!as->IsAvailable() || layout >= as->num_table) return CMD_ERROR;
    02072
    02073   Direction rotation = as->rotation[layout];
    02074   Town *t = ClosestTownFromTile(tile, UINT_MAX);
    02075   int w = as->size_x;
    02076   int h = as->size_y;
    02077   if (rotation == DIR_E || rotation == DIR_W) Swap(w, h);
    02078
    02079   if (w > _settings_game.station.station_spread || h > _settings_game.station.station_spread) {
    02080     return_cmd_error(STR_ERROR_STATION_TOO_SPREAD_OUT);
    02081   }
    02082
    02083   CommandCost cost = CheckFlatLand(TileArea(tile, w, h), flags);
    02084   if (cost.Failed()) return cost;
    02085
    02086   /* The noise level is the noise from the airport and reduce it to account for the distance to the town center. */
    02087   Town *nearest = AirportGetNearestTown(as, tile);
    02088   uint newnoise_level = GetAirportNoiseLevelForTown(as, nearest->xy, tile);
    02089
    02090   /* Check if local auth would allow a new airport */
    02091   StringID authority_refuse_message = STR_NULL;
    02092
    02093   if (_settings_game.economy.station_noise_level) {
    02094     /* do not allow to build a new airport if this raise the town noise over the maximum allowed by town */
    02095     if ((nearest->noise_reached + newnoise_level) > nearest->MaxTownNoise()) {
    02096       authority_refuse_message = STR_ERROR_LOCAL_AUTHORITY_REFUSES_NOISE;
    02097     }
    02098   } else {
    02099     uint num = 0;
    02100     const Station *st;
    02101     FOR_ALL_STATIONS(st) {
    02102       if (st->town == t && (st->facilities & FACIL_AIRPORT) && st->airport.type != AT_OILRIG) num++;
    02103     }
    02104     if (num >= 2) {
    02105       authority_refuse_message = STR_ERROR_LOCAL_AUTHORITY_REFUSES_AIRPORT;
    02106     }
    02107   }
    02108
    02109   if (authority_refuse_message != STR_NULL) {
    02110     SetDParam(0, t->index);
    02111     return_cmd_error(authority_refuse_message);
    02112   }
    02113
    02114   Station *st = NULL;
    02115   ret = FindJoiningStation(INVALID_STATION, station_to_join, HasBit(p2, 0), TileArea(tile, w, h), &st);
    02116   if (ret.Failed()) return ret;
    02117
    02118   /* Distant join */
    02119   if (st == NULL && distant_join) st = Station::GetIfValid(station_to_join);
    02120
    02121   /* Find a deleted station close to us */
    02122   if (st == NULL && reuse) st = GetClosestDeletedStation(tile);
    02123
    02124   if (st != NULL) {
    02125     if (st->owner != _current_company) {
    02126       return_cmd_error(STR_ERROR_TOO_CLOSE_TO_ANOTHER_STATION);
    02127     }
    02128
    02129     CommandCost ret = st->rect.BeforeAddRect(tile, w, h, StationRect::ADD_TEST);
    02130     if (ret.Failed()) return ret;
    02131
    02132     if (st->airport.tile != INVALID_TILE) {
    02133       return_cmd_error(STR_ERROR_TOO_CLOSE_TO_ANOTHER_AIRPORT);
    02134     }
    02135   } else {
    02136     /* allocate and initialize new station */
    02137     if (!Station::CanAllocateItem()) return_cmd_error(STR_ERROR_TOO_MANY_STATIONS_LOADING);
    02138
    02139     if (flags & DC_EXEC) {
    02140       st = new Station(tile);
    02141
    02142       st->town = t;
    02143       st->string_id = GenerateStationName(st, tile, !(GetAirport(airport_type)->flags & AirportFTAClass::AIRPLANES) ? STATIONNAMING_HELIPORT : STATIONNAMING_AIRPORT);
    02144
    02145       if (Company::IsValidID(_current_company)) {
    02146         SetBit(st->town->have_ratings, _current_company);
    02147       }
    02148     }
    02149   }
    02150
    02151   const AirportTileTable *it = as->table[layout];
    02152   do {
    02153     cost.AddCost(_price[PR_BUILD_STATION_AIRPORT]);
    02154   } while ((++it)->ti.x != -0x80);
    02155
    02156   if (flags & DC_EXEC) {
    02157     /* Always add the noise, so there will be no need to recalculate when option toggles */
    02158     nearest->noise_reached += newnoise_level;
    02159
    02160     st->AddFacility(FACIL_AIRPORT, tile);
    02161     st->airport.type = airport_type;
    02162     st->airport.layout = layout;
    02163     st->airport.flags = 0;
    02164     st->airport.rotation = rotation;
    02165     st->airport.psa.ResetToZero();
    02166
    02167     st->rect.BeforeAddRect(tile, w, h, StationRect::ADD_TRY);
    02168
    02169     it = as->table[layout];
    02170     do {
    02171       TileIndex cur_tile = tile + ToTileIndexDiff(it->ti);
    02172       MakeAirport(cur_tile, st->owner, st->index, it->gfx, WATER_CLASS_INVALID);
    02173       SetStationTileRandomBits(cur_tile, GB(Random(), 0, 4));
    02174       st->airport.Add(cur_tile);
    02175
    02176       if (AirportTileSpec::Get(GetTranslatedAirportTileID(it->gfx))->animation.status != ANIM_STATUS_NO_ANIMATION) AddAnimatedTile(cur_tile);
    02177     } while ((++it)->ti.x != -0x80);
    02178
    02179     /* Only call the animation trigger after all tiles have been built */
    02180     it = as->table[layout];
    02181     do {
    02182       TileIndex cur_tile = tile + ToTileIndexDiff(it->ti);
    02183       AirportTileAnimationTrigger(st, cur_tile, AAT_BUILT);
    02184     } while ((++it)->ti.x != -0x80);
    02185
    02186     UpdateAirplanesOnNewStation(st);
    02187
    02188     st->UpdateVirtCoord();
    02189     UpdateStationAcceptance(st, false);
    02190     st->RecomputeIndustriesNear();
    02191     InvalidateWindowData(WC_SELECT_STATION, 0, 0);
    02192     InvalidateWindowData(WC_STATION_LIST, st->owner, 0);
    02193     SetWindowWidgetDirty(WC_STATION_VIEW, st->index, SVW_PLANES);
    02194
    02195     if (_settings_game.economy.station_noise_level) {
    02196       SetWindowDirty(WC_TOWN_VIEW, st->town->index);
    02197     }
    02198   }
    02199
    02200   return cost;
    02201 }
    02202
    02209 static CommandCost RemoveAirport(TileIndex tile, DoCommandFlag flags)
    02210 {
    02211   Station *st = Station::GetByTile(tile);
    02212
    02213   if (_current_company != OWNER_WATER) {
    02214     CommandCost ret = CheckOwnership(st->owner);
    02215     if (ret.Failed()) return ret;
    02216   }
    02217
    02218   tile = st->airport.tile;
    02219
    02220   CommandCost cost(EXPENSES_CONSTRUCTION);
    02221
    02222   const Aircraft *a;
    02223   FOR_ALL_AIRCRAFT(a) {
    02224     if (!a->IsNormalAircraft()) continue;
    02225     if (a->targetairport == st->index && a->state != FLYING) return CMD_ERROR;
    02226   }
    02227
    02228   TILE_AREA_LOOP(tile_cur, st->airport) {
    02229     if (!st->TileBelongsToAirport(tile_cur)) continue;
    02230
    02231     CommandCost ret = EnsureNoVehicleOnGround(tile_cur);
    02232     if (ret.Failed()) return ret;
    02233
    02234     cost.AddCost(_price[PR_CLEAR_STATION_AIRPORT]);
    02235
    02236     if (flags & DC_EXEC) {
    02237       if (IsHangarTile(tile_cur)) OrderBackup::Reset(tile_cur, false);
    02238       DeleteAnimatedTile(tile_cur);
    02239       DoClearSquare(tile_cur);
    02240       DeleteNewGRFInspectWindow(GSF_AIRPORTTILES, tile_cur);
    02241     }
    02242   }
    02243
    02244   if (flags & DC_EXEC) {
    02245     const AirportSpec *as = st->airport.GetSpec();
    02246     for (uint i = 0; i < st->airport.GetNumHangars(); ++i) {
    02247       DeleteWindowById(
    02248         WC_VEHICLE_DEPOT, st->airport.GetHangarTile(i)
    02249       );
    02250     }
    02251
    02252     /* The noise level is the noise from the airport and reduce it to account for the distance to the town center.
    02253      * And as for construction, always remove it, even if the setting is not set, in order to avoid the
    02254      * need of recalculation */
    02255     Town *nearest = AirportGetNearestTown(as, tile);
    02256     nearest->noise_reached -= GetAirportNoiseLevelForTown(as, nearest->xy, tile);
    02257
    02258     st->rect.AfterRemoveRect(st, st->airport);
    02259
    02260     st->airport.Clear();
    02261     st->facilities &= ~FACIL_AIRPORT;
    02262     st->airport.psa.ResetToZero();
    02263
    02264     SetWindowWidgetDirty(WC_STATION_VIEW, st->index, SVW_PLANES);
    02265
    02266     if (_settings_game.economy.station_noise_level) {
    02267       SetWindowDirty(WC_TOWN_VIEW, st->town->index);
    02268     }
    02269
    02270     st->UpdateVirtCoord();
    02271     st->RecomputeIndustriesNear();
    02272     DeleteStationIfEmpty(st);
    02273     DeleteNewGRFInspectWindow(GSF_AIRPORTS, st->index);
    02274   }
    02275
    02276   return cost;
    02277 }
    02278
    02285 bool HasStationInUse(StationID station, bool include_company, CompanyID company)
    02286 {
    02287   const Vehicle *v;
    02288   FOR_ALL_VEHICLES(v) {
    02289     if ((v->owner == company) == include_company) {
    02290       const Order *order;
    02291       FOR_VEHICLE_ORDERS(v, order) {
    02292         if ((order->IsType(OT_GOTO_STATION) || order->IsType(OT_GOTO_WAYPOINT)) && order->GetDestination() == station) {
    02293           return true;
    02294         }
    02295       }
    02296     }
    02297   }
    02298   return false;
    02299 }
    02300
    02301 static const TileIndexDiffC _dock_tileoffs_chkaround[] = {
    02302   {-1,  0},
    02303   { 0,  0},
    02304   { 0,  0},
    02305   { 0, -1}
    02306 };
    02307 static const byte _dock_w_chk[4] = { 2, 1, 2, 1 };
    02308 static const byte _dock_h_chk[4] = { 1, 2, 1, 2 };
    02309
    02319 CommandCost CmdBuildDock(TileIndex tile, DoCommandFlag flags, uint32 p1, uint32 p2, const char *text)
    02320 {
    02321   StationID station_to_join = GB(p2, 16, 16);
    02322   bool reuse = (station_to_join != NEW_STATION);
    02323   if (!reuse) station_to_join = INVALID_STATION;
    02324   bool distant_join = (station_to_join != INVALID_STATION);
    02325
    02326   if (distant_join && (!_settings_game.station.distant_join_stations || !Station::IsValidID(station_to_join))) return CMD_ERROR;
    02327
    02328   DiagDirection direction = GetInclinedSlopeDirection(GetTileSlope(tile, NULL));
    02329   if (direction == INVALID_DIAGDIR) return_cmd_error(STR_ERROR_SITE_UNSUITABLE);
    02330   direction = ReverseDiagDir(direction);
    02331
    02332   /* Docks cannot be placed on rapids */
    02333   if (HasTileWaterGround(tile)) return_cmd_error(STR_ERROR_SITE_UNSUITABLE);
    02334
    02335   CommandCost ret = CheckIfAuthorityAllowsNewStation(tile, flags);
    02336   if (ret.Failed()) return ret;
    02337
    02338   if (MayHaveBridgeAbove(tile) && IsBridgeAbove(tile)) return_cmd_error(STR_ERROR_MUST_DEMOLISH_BRIDGE_FIRST);
    02339
    02340   ret = DoCommand(tile, 0, 0, flags, CMD_LANDSCAPE_CLEAR);
    02341   if (ret.Failed()) return ret;
    02342
    02343   TileIndex tile_cur = tile + TileOffsByDiagDir(direction);
    02344
    02345   if (!IsTileType(tile_cur, MP_WATER) || GetTileSlope(tile_cur, NULL) != SLOPE_FLAT) {
    02346     return_cmd_error(STR_ERROR_SITE_UNSUITABLE);
    02347   }
    02348
    02349   if (MayHaveBridgeAbove(tile_cur) && IsBridgeAbove(tile_cur)) return_cmd_error(STR_ERROR_MUST_DEMOLISH_BRIDGE_FIRST);
    02350
    02351   /* Get the water class of the water tile before it is cleared.*/
    02352   WaterClass wc = GetWaterClass(tile_cur);
    02353
    02354   ret = DoCommand(tile_cur, 0, 0, flags, CMD_LANDSCAPE_CLEAR);
    02355   if (ret.Failed()) return ret;
    02356
    02357   tile_cur += TileOffsByDiagDir(direction);
    02358   if (!IsTileType(tile_cur, MP_WATER) || GetTileSlope(tile_cur, NULL) != SLOPE_FLAT) {
    02359     return_cmd_error(STR_ERROR_SITE_UNSUITABLE);
    02360   }
    02361
    02362   /* middle */
    02363   Station *st = NULL;
    02364   ret = FindJoiningStation(INVALID_STATION, station_to_join, HasBit(p1, 0),
    02365       TileArea(tile + ToTileIndexDiff(_dock_tileoffs_chkaround[direction]),
    02366           _dock_w_chk[direction], _dock_h_chk[direction]), &st);
    02367   if (ret.Failed()) return ret;
    02368
    02369   /* Distant join */
    02370   if (st == NULL && distant_join) st = Station::GetIfValid(station_to_join);
    02371
    02372   /* Find a deleted station close to us */
    02373   if (st == NULL && reuse) st = GetClosestDeletedStation(tile);
    02374
    02375   if (st != NULL) {
    02376     if (st->owner != _current_company) {
    02377       return_cmd_error(STR_ERROR_TOO_CLOSE_TO_ANOTHER_STATION);
    02378     }
    02379
    02380     CommandCost ret = st->rect.BeforeAddRect(
    02381         tile + ToTileIndexDiff(_dock_tileoffs_chkaround[direction]),
    02382         _dock_w_chk[direction], _dock_h_chk[direction], StationRect::ADD_TEST);
    02383     if (ret.Failed()) return ret;
    02384
    02385     if (st->dock_tile != INVALID_TILE) return_cmd_error(STR_ERROR_TOO_CLOSE_TO_ANOTHER_DOCK);
    02386   } else {
    02387     /* allocate and initialize new station */
    02388     if (!Station::CanAllocateItem()) return_cmd_error(STR_ERROR_TOO_MANY_STATIONS_LOADING);
    02389
    02390     if (flags & DC_EXEC) {
    02391       st = new Station(tile);
    02392
    02393       st->town = ClosestTownFromTile(tile, UINT_MAX);
    02394       st->string_id = GenerateStationName(st, tile, STATIONNAMING_DOCK);
    02395
    02396       if (Company::IsValidID(_current_company)) {
    02397         SetBit(st->town->have_ratings, _current_company);
    02398       }
    02399     }
    02400   }
    02401
    02402   if (flags & DC_EXEC) {
    02403     st->dock_tile = tile;
    02404     st->AddFacility(FACIL_DOCK, tile);
    02405
    02406     st->rect.BeforeAddRect(
    02407         tile + ToTileIndexDiff(_dock_tileoffs_chkaround[direction]),
    02408         _dock_w_chk[direction], _dock_h_chk[direction], StationRect::ADD_TRY);
    02409
    02410     MakeDock(tile, st->owner, st->index, direction, wc);
    02411
    02412     st->UpdateVirtCoord();
    02413     UpdateStationAcceptance(st, false);
    02414     st->RecomputeIndustriesNear();
    02415     InvalidateWindowData(WC_SELECT_STATION, 0, 0);
    02416     InvalidateWindowData(WC_STATION_LIST, st->owner, 0);
    02417     SetWindowWidgetDirty(WC_STATION_VIEW, st->index, SVW_SHIPS);
    02418   }
    02419
    02420   return CommandCost(EXPENSES_CONSTRUCTION, _price[PR_BUILD_STATION_DOCK]);
    02421 }
    02422
    02429 static CommandCost RemoveDock(TileIndex tile, DoCommandFlag flags)
    02430 {
    02431   Station *st = Station::GetByTile(tile);
    02432   CommandCost ret = CheckOwnership(st->owner);
    02433   if (ret.Failed()) return ret;
    02434
    02435   TileIndex tile1 = st->dock_tile;
    02436   TileIndex tile2 = tile1 + TileOffsByDiagDir(GetDockDirection(tile1));
    02437
    02438   ret = EnsureNoVehicleOnGround(tile1);
    02439   if (ret.Succeeded()) ret = EnsureNoVehicleOnGround(tile2);
    02440   if (ret.Failed()) return ret;
    02441
    02442   if (flags & DC_EXEC) {
    02443     DoClearSquare(tile1);
    02444     MarkTileDirtyByTile(tile1);
    02445     MakeWaterKeepingClass(tile2, st->owner);
    02446
    02447     st->rect.AfterRemoveTile(st, tile1);
    02448     st->rect.AfterRemoveTile(st, tile2);
    02449
    02450     st->dock_tile = INVALID_TILE;
    02451     st->facilities &= ~FACIL_DOCK;
    02452
    02453     SetWindowWidgetDirty(WC_STATION_VIEW, st->index, SVW_SHIPS);
    02454     st->UpdateVirtCoord();
    02455     st->RecomputeIndustriesNear();
    02456     DeleteStationIfEmpty(st);
    02457   }
    02458
    02459   return CommandCost(EXPENSES_CONSTRUCTION, _price[PR_CLEAR_STATION_DOCK]);
    02460 }
    02461
    02462 #include "table/station_land.h"
    02463
    02464 const DrawTileSprites *GetStationTileLayout(StationType st, byte gfx)
    02465 {
    02466   return &_station_display_datas[st][gfx];
    02467 }
    02468
    02469 static void DrawTile_Station(TileInfo *ti)
    02470 {
    02471   const DrawTileSprites *t = NULL;
    02472   RoadTypes roadtypes;
    02473   int32 total_offset;
    02474   int32 custom_ground_offset;
    02475   const RailtypeInfo *rti = NULL;
    02476   uint32 relocation = 0;
    02477   const BaseStation *st = NULL;
    02478   const StationSpec *statspec = NULL;
    02479
    02480   if (HasStationRail(ti->tile)) {
    02481     rti = GetRailTypeInfo(GetRailType(ti->tile));
    02482     roadtypes = ROADTYPES_NONE;
    02483     total_offset = rti->GetRailtypeSpriteOffset();
    02484     custom_ground_offset = rti->fallback_railtype;
    02485
    02486     if (IsCustomStationSpecIndex(ti->tile)) {
    02487       /* look for customization */
    02488       st = BaseStation::GetByTile(ti->tile);
    02489       statspec = st->speclist[GetCustomStationSpecIndex(ti->tile)].spec;
    02490
    02491       if (statspec != NULL) {
    02492         uint tile = GetStationGfx(ti->tile);
    02493
    02494         relocation = GetCustomStationRelocation(statspec, st, ti->tile);
    02495
    02496         if (HasBit(statspec->callback_mask, CBM_STATION_SPRITE_LAYOUT)) {
    02497           uint16 callback = GetStationCallback(CBID_STATION_SPRITE_LAYOUT, 0, 0, statspec, st, ti->tile);
    02498           if (callback != CALLBACK_FAILED) tile = (callback & ~1) + GetRailStationAxis(ti->tile);
    02499         }
    02500
    02501         /* Ensure the chosen tile layout is valid for this custom station */
    02502         if (statspec->renderdata != NULL) {
    02503           t = &statspec->renderdata[tile < statspec->tiles ? tile : (uint)GetRailStationAxis(ti->tile)];
    02504         }
    02505       }
    02506     }
    02507   } else {
    02508     roadtypes = IsRoadStop(ti->tile) ? GetRoadTypes(ti->tile) : ROADTYPES_NONE;
    02509     total_offset = 0;
    02510     custom_ground_offset = 0;
    02511   }
    02512
    02513   if (IsAirport(ti->tile)) {
    02514     StationGfx gfx = GetAirportGfx(ti->tile);
    02515     if (gfx >= NEW_AIRPORTTILE_OFFSET) {
    02516       const AirportTileSpec *ats = AirportTileSpec::Get(gfx);
    02517       if (ats->grf_prop.spritegroup[0] != NULL && DrawNewAirportTile(ti, Station::GetByTile(ti->tile), gfx, ats)) {
    02518         return;
    02519       }
    02520       /* No sprite group (or no valid one) found, meaning no graphics associated.
    02521        * Use the substitute one instead */
    02522       assert(ats->grf_prop.subst_id != INVALID_AIRPORTTILE);
    02523       gfx = ats->grf_prop.subst_id;
    02524     }
    02525     switch (gfx) {
    02526       case APT_RADAR_GRASS_FENCE_SW:
    02527         t = &_station_display_datas_airport_radar_grass_fence_sw[GetAnimationFrame(ti->tile)];
    02528         break;
    02529       case APT_GRASS_FENCE_NE_FLAG:
    02530         t = &_station_display_datas_airport_flag_grass_fence_ne[GetAnimationFrame(ti->tile)];
    02531         break;
    02532       case APT_RADAR_FENCE_SW:
    02533         t = &_station_display_datas_airport_radar_fence_sw[GetAnimationFrame(ti->tile)];
    02534         break;
    02535       case APT_RADAR_FENCE_NE:
    02536         t = &_station_display_datas_airport_radar_fence_ne[GetAnimationFrame(ti->tile)];
    02537         break;
    02538       case APT_GRASS_FENCE_NE_FLAG_2:
    02539         t = &_station_display_datas_airport_flag_grass_fence_ne_2[GetAnimationFrame(ti->tile)];
    02540         break;
    02541     }
    02542   }
    02543
    02544   Owner owner = GetTileOwner(ti->tile);
    02545
    02546   PaletteID palette;
    02547   if (Company::IsValidID(owner)) {
    02548     palette = COMPANY_SPRITE_COLOUR(owner);
    02549   } else {
    02550     /* Some stations are not owner by a company, namely oil rigs */
    02551     palette = PALETTE_TO_GREY;
    02552   }
    02553
    02554   if (t == NULL || t->seq == NULL) t = GetStationTileLayout(GetStationType(ti->tile), GetStationGfx(ti->tile));
    02555
    02556   /* don't show foundation for docks */
    02557   if (ti->tileh != SLOPE_FLAT && !IsDock(ti->tile)) {
    02558     if (statspec != NULL && HasBit(statspec->flags, SSF_CUSTOM_FOUNDATIONS)) {
    02559       /* Station has custom foundations. */
    02560       SpriteID image = GetCustomStationFoundationRelocation(statspec, st, ti->tile);
    02561
    02562       if (HasBit(statspec->flags, SSF_EXTENDED_FOUNDATIONS)) {
    02563         /* Station provides extended foundations. */
    02564
    02565         static const uint8 foundation_parts[] = {
    02566           0, 0, 0, 0, // Invalid,  Invalid,   Invalid,   SLOPE_SW
    02567           0, 1, 2, 3, // Invalid,  SLOPE_EW,  SLOPE_SE,  SLOPE_WSE
    02568           0, 4, 5, 6, // Invalid,  SLOPE_NW,  SLOPE_NS,  SLOPE_NWS
    02569           7, 8, 9     // SLOPE_NE, SLOPE_ENW, SLOPE_SEN
    02570         };
    02571
    02572         AddSortableSpriteToDraw(image + foundation_parts[ti->tileh], PAL_NONE, ti->x, ti->y, 16, 16, 7, ti->z);
    02573       } else {
    02574         /* Draw simple foundations, built up from 8 possible foundation sprites. */
    02575
    02576         /* Each set bit represents one of the eight composite sprites to be drawn.
    02577          * 'Invalid' entries will not drawn but are included for completeness. */
    02578         static const uint8 composite_foundation_parts[] = {
    02579           /* Invalid  (00000000), Invalid   (11010001), Invalid   (11100100), SLOPE_SW  (11100000) */
    02580              0x00,                0xD1,                 0xE4,                 0xE0,
    02581           /* Invalid  (11001010), SLOPE_EW  (11001001), SLOPE_SE  (11000100), SLOPE_WSE (11000000) */
    02582              0xCA,                0xC9,                 0xC4,                 0xC0,
    02583           /* Invalid  (11010010), SLOPE_NW  (10010001), SLOPE_NS  (11100100), SLOPE_NWS (10100000) */
    02584              0xD2,                0x91,                 0xE4,                 0xA0,
    02585           /* SLOPE_NE (01001010), SLOPE_ENW (00001001), SLOPE_SEN (01000100) */
    02586              0x4A,                0x09,                 0x44
    02587         };
    02588
    02589         uint8 parts = composite_foundation_parts[ti->tileh];
    02590
    02591         /* If foundations continue beyond the tile's upper sides then
    02592          * mask out the last two pieces. */
    02593         uint z;
    02594         Slope slope = GetFoundationSlope(ti->tile, &z);
    02595         if (!HasFoundationNW(ti->tile, slope, z)) ClrBit(parts, 6);
    02596         if (!HasFoundationNE(ti->tile, slope, z)) ClrBit(parts, 7);
    02597
    02598         if (parts == 0) {
    02599           /* We always have to draw at least one sprite to make sure there is a boundingbox and a sprite with the
    02600            * correct offset for the childsprites.
    02601            * So, draw the (completely empty) sprite of the default foundations. */
    02602           goto draw_default_foundation;
    02603         }
    02604
    02605         StartSpriteCombine();
    02606         for (int i = 0; i < 8; i++) {
    02607           if (HasBit(parts, i)) {
    02608             AddSortableSpriteToDraw(image + i, PAL_NONE, ti->x, ti->y, 16, 16, 7, ti->z);
    02609           }
    02610         }
    02611         EndSpriteCombine();
    02612       }
    02613
    02614       OffsetGroundSprite(31, 1);
    02615       ti->z += ApplyFoundationToSlope(FOUNDATION_LEVELED, &ti->tileh);
    02616     } else {
    02617 draw_default_foundation:
    02618       DrawFoundation(ti, FOUNDATION_LEVELED);
    02619     }
    02620   }
    02621
    02622   if (IsBuoy(ti->tile)) {
    02623     DrawWaterClassGround(ti);
    02624     SpriteID sprite = GetCanalSprite(CF_BUOY, ti->tile);
    02625     if (sprite != 0) total_offset = sprite - SPR_IMG_BUOY;
    02626   } else if (IsDock(ti->tile) || (IsOilRig(ti->tile) && IsTileOnWater(ti->tile))) {
    02627     if (ti->tileh == SLOPE_FLAT) {
    02628       DrawWaterClassGround(ti);
    02629     } else {
    02630       assert(IsDock(ti->tile));
    02631       TileIndex water_tile = ti->tile + TileOffsByDiagDir(GetDockDirection(ti->tile));
    02632       WaterClass wc = GetWaterClass(water_tile);
    02633       if (wc == WATER_CLASS_SEA) {
    02634         DrawShoreTile(ti->tileh);
    02635       } else {
    02636         DrawClearLandTile(ti, 3);
    02637       }
    02638     }
    02639   } else {
    02640     SpriteID image = t->ground.sprite;
    02641     PaletteID pal  = t->ground.pal;
    02642     if (rti != NULL && rti->UsesOverlay() && (image == SPR_RAIL_TRACK_X || image == SPR_RAIL_TRACK_Y)) {
    02643       SpriteID ground = GetCustomRailSprite(rti, ti->tile, RTSG_GROUND);
    02644       DrawGroundSprite(SPR_FLAT_GRASS_TILE, PAL_NONE);
    02645       DrawGroundSprite(ground + (image == SPR_RAIL_TRACK_X ? RTO_X : RTO_Y), PAL_NONE);
    02646
    02647       if (_game_mode != GM_MENU && _settings_client.gui.show_track_reservation && HasStationReservation(ti->tile)) {
    02648         SpriteID overlay = GetCustomRailSprite(rti, ti->tile, RTSG_OVERLAY);
    02649         DrawGroundSprite(overlay + (image == SPR_RAIL_TRACK_X ? RTO_X : RTO_Y), PALETTE_CRASH);
    02650       }
    02651     } else {
    02652       if (HasBit(image, SPRITE_MODIFIER_CUSTOM_SPRITE)) {
    02653         image += GetCustomStationGroundRelocation(statspec, st, ti->tile);
    02654         image += custom_ground_offset;
    02655       } else {
    02656         image += total_offset;
    02657       }
    02658       DrawGroundSprite(image, GroundSpritePaletteTransform(image, pal, palette));
    02659
    02660       /* PBS debugging, draw reserved tracks darker */
    02661       if (_game_mode != GM_MENU && _settings_client.gui.show_track_reservation && HasStationRail(ti->tile) && HasStationReservation(ti->tile)) {
    02662         const RailtypeInfo *rti = GetRailTypeInfo(GetRailType(ti->tile));
    02663         DrawGroundSprite(GetRailStationAxis(ti->tile) == AXIS_X ? rti->base_sprites.single_x : rti->base_sprites.single_y, PALETTE_CRASH);
    02664       }
    02665     }
    02666   }
    02667
    02668   if (HasStationRail(ti->tile) && HasCatenaryDrawn(GetRailType(ti->tile)) && IsStationTileElectrifiable(ti->tile)) DrawCatenary(ti);
    02669
    02670   if (HasBit(roadtypes, ROADTYPE_TRAM)) {
    02671     Axis axis = GetRoadStopDir(ti->tile) == DIAGDIR_NE ? AXIS_X : AXIS_Y;
    02672     DrawGroundSprite((HasBit(roadtypes, ROADTYPE_ROAD) ? SPR_TRAMWAY_OVERLAY : SPR_TRAMWAY_TRAM) + (axis ^ 1), PAL_NONE);
    02673     DrawTramCatenary(ti, axis == AXIS_X ? ROAD_X : ROAD_Y);
    02674   }
    02675
    02676   if (IsRailWaypoint(ti->tile)) {
    02677     /* Don't offset the waypoint graphics; they're always the same. */
    02678     total_offset = 0;
    02679   }
    02680
    02681   DrawRailTileSeq(ti, t, TO_BUILDINGS, total_offset, relocation, palette);
    02682 }
    02683
    02684 void StationPickerDrawSprite(int x, int y, StationType st, RailType railtype, RoadType roadtype, int image)
    02685 {
    02686   int32 total_offset = 0;
    02687   PaletteID pal = COMPANY_SPRITE_COLOUR(_local_company);
    02688   const DrawTileSprites *t = GetStationTileLayout(st, image);
    02689   const RailtypeInfo *rti = NULL;
    02690
    02691   if (railtype != INVALID_RAILTYPE) {
    02692     rti = GetRailTypeInfo(railtype);
    02693     total_offset = rti->GetRailtypeSpriteOffset();
    02694   }
    02695
    02696   SpriteID img = t->ground.sprite;
    02697   if ((img == SPR_RAIL_TRACK_X || img == SPR_RAIL_TRACK_Y) && rti->UsesOverlay()) {
    02698     SpriteID ground = GetCustomRailSprite(rti, INVALID_TILE, RTSG_GROUND);
    02699     DrawSprite(SPR_FLAT_GRASS_TILE, PAL_NONE, x, y);
    02700     DrawSprite(ground + (img == SPR_RAIL_TRACK_X ? RTO_X : RTO_Y), PAL_NONE, x, y);
    02701   } else {
    02702     DrawSprite(img + total_offset, HasBit(img, PALETTE_MODIFIER_COLOUR) ? pal : PAL_NONE, x, y);
    02703   }
    02704
    02705   if (roadtype == ROADTYPE_TRAM) {
    02706     DrawSprite(SPR_TRAMWAY_TRAM + (t->ground.sprite == SPR_ROAD_PAVED_STRAIGHT_X ? 1 : 0), PAL_NONE, x, y);
    02707   }
    02708
    02709   /* Default waypoint has no railtype specific sprites */
    02710   DrawRailTileSeqInGUI(x, y, t, st == STATION_WAYPOINT ? 0 : total_offset, 0, pal);
    02711 }
    02712
    02713 static uint GetSlopeZ_Station(TileIndex tile, uint x, uint y)
    02714 {
    02715   return GetTileMaxZ(tile);
    02716 }
    02717
    02718 static Foundation GetFoundation_Station(TileIndex tile, Slope tileh)
    02719 {
    02720   return FlatteningFoundation(tileh);
    02721 }
    02722
    02723 static void GetTileDesc_Station(TileIndex tile, TileDesc *td)
    02724 {
    02725   td->owner[0] = GetTileOwner(tile);
    02726   if (IsDriveThroughStopTile(tile)) {
    02727     Owner road_owner = INVALID_OWNER;
    02728     Owner tram_owner = INVALID_OWNER;
    02729     RoadTypes rts = GetRoadTypes(tile);
    02730     if (HasBit(rts, ROADTYPE_ROAD)) road_owner = GetRoadOwner(tile, ROADTYPE_ROAD);
    02731     if (HasBit(rts, ROADTYPE_TRAM)) tram_owner = GetRoadOwner(tile, ROADTYPE_TRAM);
    02732
    02733     /* Is there a mix of owners? */
    02734     if ((tram_owner != INVALID_OWNER && tram_owner != td->owner[0]) ||
    02735         (road_owner != INVALID_OWNER && road_owner != td->owner[0])) {
    02736       uint i = 1;
    02737       if (road_owner != INVALID_OWNER) {
    02738         td->owner_type[i] = STR_LAND_AREA_INFORMATION_ROAD_OWNER;
    02739         td->owner[i] = road_owner;
    02740         i++;
    02741       }
    02742       if (tram_owner != INVALID_OWNER) {
    02743         td->owner_type[i] = STR_LAND_AREA_INFORMATION_TRAM_OWNER;
    02744         td->owner[i] = tram_owner;
    02745       }
    02746     }
    02747   }
    02748   td->build_date = BaseStation::GetByTile(tile)->build_date;
    02749
    02750   if (HasStationTileRail(tile)) {
    02751     const StationSpec *spec = GetStationSpec(tile);
    02752
    02753     if (spec != NULL) {
    02754       td->station_class = StationClass::GetName(spec->cls_id);
    02755       td->station_name  = spec->name;
    02756
    02757       if (spec->grf_prop.grffile != NULL) {
    02758         const GRFConfig *gc = GetGRFConfig(spec->grf_prop.grffile->grfid);
    02759         td->grf = gc->GetName();
    02760       }
    02761     }
    02762
    02763     const RailtypeInfo *rti = GetRailTypeInfo(GetRailType(tile));
    02764     td->rail_speed = rti->max_speed;
    02765   }
    02766
    02767   if (IsAirport(tile)) {
    02768     const AirportSpec *as = Station::GetByTile(tile)->airport.GetSpec();
    02769     td->airport_class = AirportClass::GetName(as->cls_id);
    02770     td->airport_name = as->name;
    02771
    02772     const AirportTileSpec *ats = AirportTileSpec::GetByTile(tile);
    02773     td->airport_tile_name = ats->name;
    02774
    02775     if (as->grf_prop.grffile != NULL) {
    02776       const GRFConfig *gc = GetGRFConfig(as->grf_prop.grffile->grfid);
    02777       td->grf = gc->GetName();
    02778     } else if (ats->grf_prop.grffile != NULL) {
    02779       const GRFConfig *gc = GetGRFConfig(ats->grf_prop.grffile->grfid);
    02780       td->grf = gc->GetName();
    02781     }
    02782   }
    02783
    02784   StringID str;
    02785   switch (GetStationType(tile)) {
    02786     default: NOT_REACHED();
    02787     case STATION_RAIL:     str = STR_LAI_STATION_DESCRIPTION_RAILROAD_STATION; break;
    02788     case STATION_AIRPORT:
    02789       str = (IsHangar(tile) ? STR_LAI_STATION_DESCRIPTION_AIRCRAFT_HANGAR : STR_LAI_STATION_DESCRIPTION_AIRPORT);
    02790       break;
    02791     case STATION_TRUCK:    str = STR_LAI_STATION_DESCRIPTION_TRUCK_LOADING_AREA; break;
    02792     case STATION_BUS:      str = STR_LAI_STATION_DESCRIPTION_BUS_STATION; break;
    02793     case STATION_OILRIG:   str = STR_INDUSTRY_NAME_OIL_RIG; break;
    02794     case STATION_DOCK:     str = STR_LAI_STATION_DESCRIPTION_SHIP_DOCK; break;
    02795     case STATION_BUOY:     str = STR_LAI_STATION_DESCRIPTION_BUOY; break;
    02796     case STATION_WAYPOINT: str = STR_LAI_STATION_DESCRIPTION_WAYPOINT; break;
    02797   }
    02798   td->str = str;
    02799 }
    02800
    02801
    02802 static TrackStatus GetTileTrackStatus_Station(TileIndex tile, TransportType mode, uint sub_mode, DiagDirection side)
    02803 {
    02804   TrackBits trackbits = TRACK_BIT_NONE;
    02805
    02806   switch (mode) {
    02807     case TRANSPORT_RAIL:
    02808       if (HasStationRail(tile) && !IsStationTileBlocked(tile)) {
    02809         trackbits = TrackToTrackBits(GetRailStationTrack(tile));
    02810       }
    02811       break;
    02812
    02813     case TRANSPORT_WATER:
    02814       /* buoy is coded as a station, it is always on open water */
    02815       if (IsBuoy(tile)) {
    02816         trackbits = TRACK_BIT_ALL;
    02817         /* remove tracks that connect NE map edge */
    02818         if (TileX(tile) == 0) trackbits &= ~(TRACK_BIT_X | TRACK_BIT_UPPER | TRACK_BIT_RIGHT);
    02819         /* remove tracks that connect NW map edge */
    02820         if (TileY(tile) == 0) trackbits &= ~(TRACK_BIT_Y | TRACK_BIT_LEFT | TRACK_BIT_UPPER);
    02821       }
    02822       break;
    02823
    02824     case TRANSPORT_ROAD:
    02825       if ((GetRoadTypes(tile) & sub_mode) != 0 && IsRoadStop(tile)) {
    02826         DiagDirection dir = GetRoadStopDir(tile);
    02827         Axis axis = DiagDirToAxis(dir);
    02828
    02829         if (side != INVALID_DIAGDIR) {
    02830           if (axis != DiagDirToAxis(side) || (IsStandardRoadStopTile(tile) && dir != side)) break;
    02831         }
    02832
    02833         trackbits = AxisToTrackBits(axis);
    02834       }
    02835       break;
    02836
    02837     default:
    02838       break;
    02839   }
    02840
    02841   return CombineTrackStatus(TrackBitsToTrackdirBits(trackbits), TRACKDIR_BIT_NONE);
    02842 }
    02843
    02844
    02845 static void TileLoop_Station(TileIndex tile)
    02846 {
    02847   /* FIXME -- GetTileTrackStatus_Station -> animated stationtiles
    02848    * hardcoded.....not good */
    02849   switch (GetStationType(tile)) {
    02850     case STATION_AIRPORT:
    02851       AirportTileAnimationTrigger(Station::GetByTile(tile), tile, AAT_TILELOOP);
    02852       break;
    02853
    02854     case STATION_DOCK:
    02855       if (GetTileSlope(tile, NULL) != SLOPE_FLAT) break; // only handle water part
    02856       /* FALL THROUGH */
    02857     case STATION_OILRIG: //(station part)
    02858     case STATION_BUOY:
    02859       TileLoop_Water(tile);
    02860       break;
    02861
    02862     default: break;
    02863   }
    02864 }
    02865
    02866
    02867 static void AnimateTile_Station(TileIndex tile)
    02868 {
    02869   if (HasStationRail(tile)) {
    02870     AnimateStationTile(tile);
    02871     return;
    02872   }
    02873
    02874   if (IsAirport(tile)) {
    02875     AnimateAirportTile(tile);
    02876   }
    02877 }
    02878
    02879
    02880 static bool ClickTile_Station(TileIndex tile)
    02881 {
    02882   const BaseStation *bst = BaseStation::GetByTile(tile);
    02883
    02884   if (bst->facilities & FACIL_WAYPOINT) {
    02885     ShowWaypointWindow(Waypoint::From(bst));
    02886   } else if (IsHangar(tile)) {
    02887     const Station *st = Station::From(bst);
    02888     ShowDepotWindow(st->airport.GetHangarTile(st->airport.GetHangarNum(tile)), VEH_AIRCRAFT);
    02889   } else {
    02890     ShowStationViewWindow(bst->index);
    02891   }
    02892   return true;
    02893 }
    02894
    02895 static VehicleEnterTileStatus VehicleEnter_Station(Vehicle *v, TileIndex tile, int x, int y)
    02896 {
    02897   if (v->type == VEH_TRAIN) {
    02898     StationID station_id = GetStationIndex(tile);
    02899     if (!v->current_order.ShouldStopAtStation(v, station_id)) return VETSB_CONTINUE;
    02900     if (!IsRailStation(tile) || !v->IsFrontEngine()) return VETSB_CONTINUE;
    02901
    02902     int station_ahead;
    02903     int station_length;
    02904     int stop = GetTrainStopLocation(station_id, tile, Train::From(v), &station_ahead, &station_length);
    02905
    02906     /* Stop whenever that amount of station ahead + the distance from the
    02907      * begin of the platform to the stop location is longer than the length
    02908      * of the platform. Station ahead 'includes' the current tile where the
    02909      * vehicle is on, so we need to substract that. */
    02910     if (!IsInsideBS(stop + station_ahead, station_length, TILE_SIZE)) return VETSB_CONTINUE;
    02911
    02912     DiagDirection dir = DirToDiagDir(v->direction);
    02913
    02914     x &= 0xF;
    02915     y &= 0xF;
    02916
    02917     if (DiagDirToAxis(dir) != AXIS_X) Swap(x, y);
    02918     if (y == TILE_SIZE / 2) {
    02919       if (dir != DIAGDIR_SE && dir != DIAGDIR_SW) x = TILE_SIZE - 1 - x;
    02920       stop &= TILE_SIZE - 1;
    02921
    02922       if (x == stop) return VETSB_ENTERED_STATION | (VehicleEnterTileStatus)(station_id << VETS_STATION_ID_OFFSET); // enter station
    02923       if (x < stop) {
    02924         uint16 spd;
    02925
    02926         v->vehstatus |= VS_TRAIN_SLOWING;
    02927         spd = max(0, (stop - x) * 20 - 15);
    02928         if (spd < v->cur_speed) v->cur_speed = spd;
    02929       }
    02930     }
    02931   } else if (v->type == VEH_ROAD) {
    02932     RoadVehicle *rv = RoadVehicle::From(v);
    02933     if (rv->state < RVSB_IN_ROAD_STOP && !IsReversingRoadTrackdir((Trackdir)rv->state) && rv->frame == 0) {
    02934       if (IsRoadStop(tile) && rv->IsFrontEngine()) {
    02935         /* Attempt to allocate a parking bay in a road stop */
    02936         return RoadStop::GetByTile(tile, GetRoadStopType(tile))->Enter(rv) ? VETSB_CONTINUE : VETSB_CANNOT_ENTER;
    02937       }
    02938     }
    02939   }
    02940
    02941   return VETSB_CONTINUE;
    02942 }
    02943
    02950 static bool StationHandleBigTick(BaseStation *st)
    02951 {
    02952   if (!st->IsInUse() && ++st->delete_ctr >= 8) {
    02953     delete st;
    02954     return false;
    02955   }
    02956
    02957   if ((st->facilities & FACIL_WAYPOINT) == 0) UpdateStationAcceptance(Station::From(st), true);
    02958
    02959   return true;
    02960 }
    02961
    02962 static inline void byte_inc_sat(byte *p)
    02963 {
    02964   byte b = *p + 1;
    02965   if (b != 0) *p = b;
    02966 }
    02967
    02968 static void UpdateStationRating(Station *st)
    02969 {
    02970   bool waiting_changed = false;
    02971
    02972   byte_inc_sat(&st->time_since_load);
    02973   byte_inc_sat(&st->time_since_unload);
    02974
    02975   const CargoSpec *cs;
    02976   FOR_ALL_CARGOSPECS(cs) {
    02977     GoodsEntry *ge = &st->goods[cs->Index()];
    02978     /* Slowly increase the rating back to his original level in the case we
    02979      *  didn't deliver cargo yet to this station. This happens when a bribe
    02980      *  failed while you didn't moved that cargo yet to a station. */
    02981     if (!HasBit(ge->acceptance_pickup, GoodsEntry::PICKUP) && ge->rating < INITIAL_STATION_RATING) {
    02982       ge->rating++;
    02983     }
    02984
    02985     /* Only change the rating if we are moving this cargo */
    02986     if (HasBit(ge->acceptance_pickup, GoodsEntry::PICKUP)) {
    02987       byte_inc_sat(&ge->days_since_pickup);
    02988
    02989       bool skip = false;
    02990       int rating = 0;
    02991       uint waiting = ge->cargo.Count();
    02992
    02993       if (HasBit(cs->callback_mask, CBM_CARGO_STATION_RATING_CALC)) {
    02994         /* Perform custom station rating. If it succeeds the speed, days in transit and
    02995          * waiting cargo ratings must not be executed. */
    02996
    02997         /* NewGRFs expect last speed to be 0xFF when no vehicle has arrived yet. */
    02998         uint last_speed = ge->last_speed;
    02999         if (last_speed == 0) last_speed = 0xFF;
    03000
    03001         uint32 var18 = min(ge->days_since_pickup, 0xFF) | (min(waiting, 0xFFFF) << 8) | (min(last_speed, 0xFF) << 24);
    03002         /* Convert to the 'old' vehicle types */
    03003         uint32 var10 = (st->last_vehicle_type == VEH_INVALID) ? 0x0 : (st->last_vehicle_type + 0x10);
    03004         uint16 callback = GetCargoCallback(CBID_CARGO_STATION_RATING_CALC, var10, var18, cs);
    03005         if (callback != CALLBACK_FAILED) {
    03006           skip = true;
    03007           rating = GB(callback, 0, 14);
    03008
    03009           /* Simulate a 15 bit signed value */
    03010           if (HasBit(callback, 14)) rating -= 0x4000;
    03011         }
    03012       }
    03013
    03014       if (!skip) {
    03015         int b = ge->last_speed - 85;
    03016         if (b >= 0) rating += b >> 2;
    03017
    03018         byte days = ge->days_since_pickup;
    03019         if (st->last_vehicle_type == VEH_SHIP) days >>= 2;
    03020         (days > 21) ||
    03021         (rating += 25, days > 12) ||
    03022         (rating += 25, days > 6) ||
    03023         (rating += 45, days > 3) ||
    03024         (rating += 35, true);
    03025
    03026         (rating -= 90, waiting > 1500) ||
    03027         (rating += 55, waiting > 1000) ||
    03028         (rating += 35, waiting > 600) ||
    03029         (rating += 10, waiting > 300) ||
    03030         (rating += 20, waiting > 100) ||
    03031         (rating += 10, true);
    03032       }
    03033
    03034       if (Company::IsValidID(st->owner) && HasBit(st->town->statues, st->owner)) rating += 26;
    03035
    03036       byte age = ge->last_age;
    03037       (age >= 3) ||
    03038       (rating += 10, age >= 2) ||
    03039       (rating += 10, age >= 1) ||
    03040       (rating += 13, true);
    03041
    03042       {
    03043         int or_ = ge->rating; // old rating
    03044
    03045         /* only modify rating in steps of -2, -1, 0, 1 or 2 */
    03046         ge->rating = rating = or_ + Clamp(Clamp(rating, 0, 255) - or_, -2, 2);
    03047
    03048         /* if rating is <= 64 and more than 200 items waiting,
    03049          * remove some random amount of goods from the station */
    03050         if (rating <= 64 && waiting >= 200) {
    03051           int dec = Random() & 0x1F;
    03052           if (waiting < 400) dec &= 7;
    03053           waiting -= dec + 1;
    03054           waiting_changed = true;
    03055         }
    03056
    03057         /* if rating is <= 127 and there are any items waiting, maybe remove some goods. */
    03058         if (rating <= 127 && waiting != 0) {
    03059           uint32 r = Random();
    03060           if (rating <= (int)GB(r, 0, 7)) {
    03061             /* Need to have int, otherwise it will just overflow etc. */
    03062             waiting = max((int)waiting - (int)GB(r, 8, 2) - 1, 0);
    03063             waiting_changed = true;
    03064           }
    03065         }
    03066
    03067         /* At some point we really must cap the cargo. Previously this
    03068          * was a strict 4095, but now we'll have a less strict, but
    03069          * increasingly agressive truncation of the amount of cargo. */
    03070         static const uint WAITING_CARGO_THRESHOLD  = 1 << 12;
    03071         static const uint WAITING_CARGO_CUT_FACTOR = 1 <<  6;
    03072         static const uint MAX_WAITING_CARGO        = 1 << 15;
    03073
    03074         if (waiting > WAITING_CARGO_THRESHOLD) {
    03075           uint difference = waiting - WAITING_CARGO_THRESHOLD;
    03076           waiting -= (difference / WAITING_CARGO_CUT_FACTOR);
    03077
    03078           waiting = min(waiting, MAX_WAITING_CARGO);
    03079           waiting_changed = true;
    03080         }
    03081
    03082         if (waiting_changed) ge->cargo.Truncate(waiting);
    03083       }
    03084     }
    03085   }
    03086
    03087   StationID index = st->index;
    03088   if (waiting_changed) {
    03089     SetWindowDirty(WC_STATION_VIEW, index); // update whole window
    03090   } else {
    03091     SetWindowWidgetDirty(WC_STATION_VIEW, index, SVW_RATINGLIST); // update only ratings list
    03092   }
    03093 }
    03094
    03095 /* called for every station each tick */
    03096 static void StationHandleSmallTick(BaseStation *st)
    03097 {
    03098   if ((st->facilities & FACIL_WAYPOINT) != 0 || !st->IsInUse()) return;
    03099
    03100   byte b = st->delete_ctr + 1;
    03101   if (b >= 185) b = 0;
    03102   st->delete_ctr = b;
    03103
    03104   if (b == 0) UpdateStationRating(Station::From(st));
    03105 }
    03106
    03107 void OnTick_Station()
    03108 {
    03109   if (_game_mode == GM_EDITOR) return;
    03110
    03111   BaseStation *st;
    03112   FOR_ALL_BASE_STATIONS(st) {
    03113     StationHandleSmallTick(st);
    03114
    03115     /* Run 250 tick interval trigger for station animation.
    03116      * Station index is included so that triggers are not all done
    03117      * at the same time. */
    03118     if ((_tick_counter + st->index) % 250 == 0) {
    03119       /* Stop processing this station if it was deleted */
    03120       if (!StationHandleBigTick(st)) continue;
    03121       TriggerStationAnimation(st, st->xy, SAT_250_TICKS);
    03122       if (Station::IsExpected(st)) AirportAnimationTrigger(Station::From(st), AAT_STATION_250_TICKS);
    03123     }
    03124   }
    03125 }
    03126
    03127 void StationMonthlyLoop()
    03128 {
    03129   /* not used */
    03130 }
    03131
    03132
    03133 void ModifyStationRatingAround(TileIndex tile, Owner owner, int amount, uint radius)
    03134 {
    03135   Station *st;
    03136
    03137   FOR_ALL_STATIONS(st) {
    03138     if (st->owner == owner &&
    03139         DistanceManhattan(tile, st->xy) <= radius) {
    03140       for (CargoID i = 0; i < NUM_CARGO; i++) {
    03141         GoodsEntry *ge = &st->goods[i];
    03142
    03143         if (ge->acceptance_pickup != 0) {
    03144           ge->rating = Clamp(ge->rating + amount, 0, 255);
    03145         }
    03146       }
    03147     }
    03148   }
    03149 }
    03150
    03151 static uint UpdateStationWaiting(Station *st, CargoID type, uint amount, SourceType source_type, SourceID source_id)
    03152 {
    03153   /* We can't allocate a CargoPacket? Then don't do anything
    03154    * at all; i.e. just discard the incoming cargo. */
    03155   if (!CargoPacket::CanAllocateItem()) return 0;
    03156
    03157   GoodsEntry &ge = st->goods[type];
    03158   amount += ge.amount_fract;
    03159   ge.amount_fract = GB(amount, 0, 8);
    03160
    03161   amount >>= 8;
    03162   /* No new "real" cargo item yet. */
    03163   if (amount == 0) return 0;
    03164
    03165   ge.cargo.Append(new CargoPacket(st->index, st->xy, amount, source_type, source_id));
    03166
    03167   if (!HasBit(ge.acceptance_pickup, GoodsEntry::PICKUP)) {
    03168     InvalidateWindowData(WC_STATION_LIST, st->index);
    03169     SetBit(ge.acceptance_pickup, GoodsEntry::PICKUP);
    03170   }
    03171
    03172   TriggerStationAnimation(st, st->xy, SAT_NEW_CARGO, type);
    03173   AirportAnimationTrigger(st, AAT_STATION_NEW_CARGO, type);
    03174
    03175   SetWindowDirty(WC_STATION_VIEW, st->index);
    03176   st->MarkTilesDirty(true);
    03177   return amount;
    03178 }
    03179
    03180 static bool IsUniqueStationName(const char *name)
    03181 {
    03182   const Station *st;
    03183
    03184   FOR_ALL_STATIONS(st) {
    03185     if (st->name != NULL && strcmp(st->name, name) == 0) return false;
    03186   }
    03187
    03188   return true;
    03189 }
    03190
    03200 CommandCost CmdRenameStation(TileIndex tile, DoCommandFlag flags, uint32 p1, uint32 p2, const char *text)
    03201 {
    03202   Station *st = Station::GetIfValid(p1);
    03203   if (st == NULL) return CMD_ERROR;
    03204
    03205   CommandCost ret = CheckOwnership(st->owner);
    03206   if (ret.Failed()) return ret;
    03207
    03208   bool reset = StrEmpty(text);
    03209
    03210   if (!reset) {
    03211     if (Utf8StringLength(text) >= MAX_LENGTH_STATION_NAME_CHARS) return CMD_ERROR;
    03212     if (!IsUniqueStationName(text)) return_cmd_error(STR_ERROR_NAME_MUST_BE_UNIQUE);
    03213   }
    03214
    03215   if (flags & DC_EXEC) {
    03216     free(st->name);
    03217     st->name = reset ? NULL : strdup(text);
    03218
    03219     st->UpdateVirtCoord();
    03220     InvalidateWindowData(WC_STATION_LIST, st->owner, 1);
    03221   }
    03222
    03223   return CommandCost();
    03224 }
    03225
    03232 void FindStationsAroundTiles(const TileArea &location, StationList *stations)
    03233 {
    03234   /* area to search = producer plus station catchment radius */
    03235   int max_rad = (_settings_game.station.modified_catchment ? MAX_CATCHMENT : CA_UNMODIFIED);
    03236
    03237   for (int dy = -max_rad; dy < location.h + max_rad; dy++) {
    03238     for (int dx = -max_rad; dx < location.w + max_rad; dx++) {
    03239       TileIndex cur_tile = TileAddWrap(location.tile, dx, dy);
    03240       if (cur_tile == INVALID_TILE || !IsTileType(cur_tile, MP_STATION)) continue;
    03241
    03242       Station *st = Station::GetByTile(cur_tile);
    03243       if (st == NULL) continue;
    03244
    03245       if (_settings_game.station.modified_catchment) {
    03246         int rad = st->GetCatchmentRadius();
    03247         if (dx < -rad || dx >= rad + location.w || dy < -rad || dy >= rad + location.h) continue;
    03248       }
    03249
    03250       /* Insert the station in the set. This will fail if it has
    03251        * already been added.
    03252        */
    03253       stations->Include(st);
    03254     }
    03255   }
    03256 }
    03257
    03262 const StationList *StationFinder::GetStations()
    03263 {
    03264   if (this->tile != INVALID_TILE) {
    03265     FindStationsAroundTiles(*this, &this->stations);
    03266     this->tile = INVALID_TILE;
    03267   }
    03268   return &this->stations;
    03269 }
    03270
    03271 uint MoveGoodsToStation(CargoID type, uint amount, SourceType source_type, SourceID source_id, const StationList *all_stations)
    03272 {
    03273   /* Return if nothing to do. Also the rounding below fails for 0. */
    03274   if (amount == 0) return 0;
    03275
    03276   Station *st1 = NULL;   // Station with best rating
    03277   Station *st2 = NULL;   // Second best station
    03278   uint best_rating1 = 0; // rating of st1
    03279   uint best_rating2 = 0; // rating of st2
    03280
    03281   for (Station * const *st_iter = all_stations->Begin(); st_iter != all_stations->End(); ++st_iter) {
    03282     Station *st = *st_iter;
    03283
    03284     /* Is the station reserved exclusively for somebody else? */
    03285     if (st->town->exclusive_counter > 0 && st->town->exclusivity != st->owner) continue;
    03286
    03287     if (st->goods[type].rating == 0) continue; // Lowest possible rating, better not to give cargo anymore
    03288
    03289     if (_settings_game.order.selectgoods && st->goods[type].last_speed == 0) continue; // Selectively servicing stations, and not this one
    03290
    03291     if (IsCargoInClass(type, CC_PASSENGERS)) {
    03292       if (st->facilities == FACIL_TRUCK_STOP) continue; // passengers are never served by just a truck stop
    03293     } else {
    03294       if (st->facilities == FACIL_BUS_STOP) continue; // non-passengers are never served by just a bus stop
    03295     }
    03296
    03297     /* This station can be used, add it to st1/st2 */
    03298     if (st1 == NULL || st->goods[type].rating >= best_rating1) {
    03299       st2 = st1; best_rating2 = best_rating1; st1 = st; best_rating1 = st->goods[type].rating;
    03300     } else if (st2 == NULL || st->goods[type].rating >= best_rating2) {
    03301       st2 = st; best_rating2 = st->goods[type].rating;
    03302     }
    03303   }
    03304
    03305   /* no stations around at all? */
    03306   if (st1 == NULL) return 0;
    03307
    03308   /* From now we'll calculate with fractal cargo amounts.
    03309    * First determine how much cargo we really have. */
    03310   amount *= best_rating1 + 1;
    03311
    03312   if (st2 == NULL) {
    03313     /* only one station around */
    03314     return UpdateStationWaiting(st1, type, amount, source_type, source_id);
    03315   }
    03316
    03317   /* several stations around, the best two (highest rating) are in st1 and st2 */
    03318   assert(st1 != NULL);
    03319   assert(st2 != NULL);
    03320   assert(best_rating1 != 0 || best_rating2 != 0);
    03321
    03322   /* Then determine the amount the worst station gets. We do it this way as the
    03323    * best should get a bonus, which in this case is the rounding difference from
    03324    * this calculation. In reality that will mean the bonus will be pretty low.
    03325    * Nevertheless, the best station should always get the most cargo regardless
    03326    * of rounding issues. */
    03327   uint worst_cargo = amount * best_rating2 / (best_rating1 + best_rating2);
    03328   assert(worst_cargo <= (amount - worst_cargo));
    03329
    03330   /* And then send the cargo to the stations! */
    03331   uint moved = UpdateStationWaiting(st1, type, amount - worst_cargo, source_type, source_id);
    03332   /* These two UpdateStationWaiting's can't be in the statement as then the order
    03333    * of execution would be undefined and that could cause desyncs with callbacks. */
    03334   return moved + UpdateStationWaiting(st2, type, worst_cargo, source_type, source_id);
    03335 }
    03336
    03337 void BuildOilRig(TileIndex tile)
    03338 {
    03339   if (!Station::CanAllocateItem()) {
    03340     DEBUG(misc, 0, "Can't allocate station for oilrig at 0x%X, reverting to oilrig only", tile);
    03341     return;
    03342   }
    03343
    03344   Station *st = new Station(tile);
    03345   st->town = ClosestTownFromTile(tile, UINT_MAX);
    03346
    03347   st->string_id = GenerateStationName(st, tile, STATIONNAMING_OILRIG);
    03348
    03349   assert(IsTileType(tile, MP_INDUSTRY));
    03350   DeleteAnimatedTile(tile);
    03351   MakeOilrig(tile, st->index, GetWaterClass(tile));
    03352
    03353   st->owner = OWNER_NONE;
    03354   st->airport.type = AT_OILRIG;
    03355   st->airport.Add(tile);
    03356   st->dock_tile = tile;
    03357   st->facilities = FACIL_AIRPORT | FACIL_DOCK;
    03358   st->build_date = _date;
    03359
    03360   st->rect.BeforeAddTile(tile, StationRect::ADD_FORCE);
    03361
    03362   for (CargoID j = 0; j < NUM_CARGO; j++) {
    03363     st->goods[j].acceptance_pickup = 0;
    03364     st->goods[j].days_since_pickup = 255;
    03365     st->goods[j].rating = INITIAL_STATION_RATING;
    03366     st->goods[j].last_speed = 0;
    03367     st->goods[j].last_age = 255;
    03368   }
    03369
    03370   st->UpdateVirtCoord();
    03371   UpdateStationAcceptance(st, false);
    03372   st->RecomputeIndustriesNear();
    03373 }
    03374
    03375 void DeleteOilRig(TileIndex tile)
    03376 {
    03377   Station *st = Station::GetByTile(tile);
    03378
    03379   MakeWaterKeepingClass(tile, OWNER_NONE);
    03380
    03381   st->dock_tile = INVALID_TILE;
    03382   st->airport.Clear();
    03383   st->facilities &= ~(FACIL_AIRPORT | FACIL_DOCK);
    03384   st->airport.flags = 0;
    03385
    03386   st->rect.AfterRemoveTile(st, tile);
    03387
    03388   st->UpdateVirtCoord();
    03389   st->RecomputeIndustriesNear();
    03390   if (!st->IsInUse()) delete st;
    03391 }
    03392
    03393 static void ChangeTileOwner_Station(TileIndex tile, Owner old_owner, Owner new_owner)
    03394 {
    03395   if (IsDriveThroughStopTile(tile)) {
    03396     for (RoadType rt = ROADTYPE_ROAD; rt < ROADTYPE_END; rt++) {
    03397       /* Update all roadtypes, no matter if they are present */
    03398       if (GetRoadOwner(tile, rt) == old_owner) {
    03399         SetRoadOwner(tile, rt, new_owner == INVALID_OWNER ? OWNER_NONE : new_owner);
    03400       }
    03401     }
    03402   }
    03403
    03404   if (!IsTileOwner(tile, old_owner)) return;
    03405
    03406   if (new_owner != INVALID_OWNER) {
    03407     /* for buoys, owner of tile is owner of water, st->owner == OWNER_NONE */
    03408     SetTileOwner(tile, new_owner);
    03409     InvalidateWindowClassesData(WC_STATION_LIST, 0);
    03410   } else {
    03411     if (IsDriveThroughStopTile(tile)) {
    03412       /* Remove the drive-through road stop */
    03413       DoCommand(tile, 1 | 1 << 8, (GetStationType(tile) == STATION_TRUCK) ? ROADSTOP_TRUCK : ROADSTOP_BUS, DC_EXEC | DC_BANKRUPT, CMD_REMOVE_ROAD_STOP);
    03414       assert(IsTileType(tile, MP_ROAD));
    03415       /* Change owner of tile and all roadtypes */
    03416       ChangeTileOwner(tile, old_owner, new_owner);
    03417     } else {
    03418       DoCommand(tile, 0, 0, DC_EXEC | DC_BANKRUPT, CMD_LANDSCAPE_CLEAR);
    03419       /* Set tile owner of water under (now removed) buoy and dock to OWNER_NONE.
    03420        * Update owner of buoy if it was not removed (was in orders).
    03421        * Do not update when owned by OWNER_WATER (sea and rivers). */
    03422       if ((IsTileType(tile, MP_WATER) || IsBuoyTile(tile)) && IsTileOwner(tile, old_owner)) SetTileOwner(tile, OWNER_NONE);
    03423     }
    03424   }
    03425 }
    03426
    03435 static bool CanRemoveRoadWithStop(TileIndex tile, DoCommandFlag flags)
    03436 {
    03437   /* Yeah... water can always remove stops, right? */
    03438   if (_current_company == OWNER_WATER) return true;
    03439
    03440   RoadTypes rts = GetRoadTypes(tile);
    03441   if (HasBit(rts, ROADTYPE_TRAM)) {
    03442     Owner tram_owner = GetRoadOwner(tile, ROADTYPE_TRAM);
    03443     if (tram_owner != OWNER_NONE && CheckOwnership(tram_owner).Failed()) return false;
    03444   }
    03445   if (HasBit(rts, ROADTYPE_ROAD)) {
    03446     Owner road_owner = GetRoadOwner(tile, ROADTYPE_ROAD);
    03447     if (road_owner != OWNER_TOWN) {
    03448       if (road_owner != OWNER_NONE && CheckOwnership(road_owner).Failed()) return false;
    03449     } else {
    03450       if (CheckAllowRemoveRoad(tile, GetAnyRoadBits(tile, ROADTYPE_ROAD), OWNER_TOWN, ROADTYPE_ROAD, flags).Failed()) return false;
    03451     }
    03452   }
    03453
    03454   return true;
    03455 }
    03456
    03457 CommandCost ClearTile_Station(TileIndex tile, DoCommandFlag flags)
    03458 {
    03459   if (flags & DC_AUTO) {
    03460     switch (GetStationType(tile)) {
    03461       default: break;
    03462       case STATION_RAIL:     return_cmd_error(STR_ERROR_MUST_DEMOLISH_RAILROAD);
    03463       case STATION_WAYPOINT: return_cmd_error(STR_ERROR_BUILDING_MUST_BE_DEMOLISHED);
    03464       case STATION_AIRPORT:  return_cmd_error(STR_ERROR_MUST_DEMOLISH_AIRPORT_FIRST);
    03465       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);
    03466       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);
    03467       case STATION_BUOY:     return_cmd_error(STR_ERROR_BUOY_IN_THE_WAY);
    03468       case STATION_DOCK:     return_cmd_error(STR_ERROR_MUST_DEMOLISH_DOCK_FIRST);
    03469       case STATION_OILRIG:
    03470         SetDParam(1, STR_INDUSTRY_NAME_OIL_RIG);
    03471         return_cmd_error(STR_ERROR_GENERIC_OBJECT_IN_THE_WAY);
    03472     }
    03473   }
    03474
    03475   switch (GetStationType(tile)) {
    03476     case STATION_RAIL:     return RemoveRailStation(tile, flags);
    03477     case STATION_WAYPOINT: return RemoveRailWaypoint(tile, flags);
    03478     case STATION_AIRPORT:  return RemoveAirport(tile, flags);
    03479     case STATION_TRUCK:
    03480       if (IsDriveThroughStopTile(tile) && !CanRemoveRoadWithStop(tile, flags)) {
    03481         return_cmd_error(STR_ERROR_MUST_DEMOLISH_TRUCK_STATION_FIRST);
    03482       }
    03483       return RemoveRoadStop(tile, flags);
    03484     case STATION_BUS:
    03485       if (IsDriveThroughStopTile(tile) && !CanRemoveRoadWithStop(tile, flags)) {
    03486         return_cmd_error(STR_ERROR_MUST_DEMOLISH_BUS_STATION_FIRST);
    03487       }
    03488       return RemoveRoadStop(tile, flags);
    03489     case STATION_BUOY:     return RemoveBuoy(tile, flags);
    03490     case STATION_DOCK:     return RemoveDock(tile, flags);
    03491     default: break;
    03492   }
    03493
    03494   return CMD_ERROR;
    03495 }
    03496
    03497 static CommandCost TerraformTile_Station(TileIndex tile, DoCommandFlag flags, uint z_new, Slope tileh_new)
    03498 {
    03499   if (_settings_game.construction.build_on_slopes && AutoslopeEnabled()) {
    03500     /* TODO: If you implement newgrf callback 149 'land slope check', you have to decide what to do with it here.
    03501      *       TTDP does not call it.
    03502      */
    03503     if (!IsSteepSlope(tileh_new) && (GetTileMaxZ(tile) == z_new + GetSlopeMaxZ(tileh_new))) {
    03504       switch (GetStationType(tile)) {
    03505         case STATION_WAYPOINT:
    03506         case STATION_RAIL: {
    03507           DiagDirection direction = AxisToDiagDir(GetRailStationAxis(tile));
    03508           if (!AutoslopeCheckForEntranceEdge(tile, z_new, tileh_new, direction)) break;
    03509           if (!AutoslopeCheckForEntranceEdge(tile, z_new, tileh_new, ReverseDiagDir(direction))) break;
    03510           return CommandCost(EXPENSES_CONSTRUCTION, _price[PR_BUILD_FOUNDATION]);
    03511         }
    03512
    03513         case STATION_AIRPORT:
    03514           return CommandCost(EXPENSES_CONSTRUCTION, _price[PR_BUILD_FOUNDATION]);
    03515
    03516         case STATION_TRUCK:
    03517         case STATION_BUS: {
    03518           DiagDirection direction = GetRoadStopDir(tile);
    03519           if (!AutoslopeCheckForEntranceEdge(tile, z_new, tileh_new, direction)) break;
    03520           if (IsDriveThroughStopTile(tile)) {
    03521             if (!AutoslopeCheckForEntranceEdge(tile, z_new, tileh_new, ReverseDiagDir(direction))) break;
    03522           }
    03523           return CommandCost(EXPENSES_CONSTRUCTION, _price[PR_BUILD_FOUNDATION]);
    03524         }
    03525
    03526         default: break;
    03527       }
    03528     }
    03529   }
    03530   return DoCommand(tile, 0, 0, flags, CMD_LANDSCAPE_CLEAR);
    03531 }
    03532
    03533
    03534 extern const TileTypeProcs _tile_type_station_procs = {
    03535   DrawTile_Station,           // draw_tile_proc
    03536   GetSlopeZ_Station,          // get_slope_z_proc
    03537   ClearTile_Station,          // clear_tile_proc
    03538   NULL,                       // add_accepted_cargo_proc
    03539   GetTileDesc_Station,        // get_tile_desc_proc
    03540   GetTileTrackStatus_Station, // get_tile_track_status_proc
    03541   ClickTile_Station,          // click_tile_proc
    03542   AnimateTile_Station,        // animate_tile_proc
    03543   TileLoop_Station,           // tile_loop_clear
    03544   ChangeTileOwner_Station,    // change_tile_owner_clear
    03545   NULL,                       // add_produced_cargo_proc
    03546   VehicleEnter_Station,       // vehicle_enter_tile_proc
    03547   GetFoundation_Station,      // get_foundation_proc
    03548   TerraformTile_Station,      // terraform_tile_proc
    03549 };