station_cmd.cpp

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00001 /* $Id: station_cmd.cpp 19928 2010-06-04 21:14:22Z 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 "landscape.h"
00017 #include "viewport_func.h"
00018 #include "command_func.h"
00019 #include "town.h"
00020 #include "news_func.h"
00021 #include "train.h"
00022 #include "roadveh.h"
00023 #include "industry.h"
00024 #include "newgrf_cargo.h"
00025 #include "newgrf_station.h"
00026 #include "pathfinder/yapf/yapf_cache.h"
00027 #include "road_internal.h" /* For drawing catenary/checking road removal */
00028 #include "variables.h"
00029 #include "autoslope.h"
00030 #include "water.h"
00031 #include "station_gui.h"
00032 #include "strings_func.h"
00033 #include "functions.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 "newgrf.h"
00050 #include "table/airporttile_ids.h"
00051 
00052 #include "table/strings.h"
00053 
00060 bool IsHangar(TileIndex t)
00061 {
00062   assert(IsTileType(t, MP_STATION));
00063 
00064   /* If the tile isn't an airport there's no chance it's a hangar. */
00065   if (!IsAirport(t)) return false;
00066 
00067   const Station *st = Station::GetByTile(t);
00068   const AirportSpec *as = st->GetAirportSpec();
00069 
00070   for (uint i = 0; i < as->nof_depots; i++) {
00071     if (st->GetHangarTile(i) == t) return true;
00072   }
00073 
00074   return false;
00075 }
00076 
00084 template <class T>
00085 bool GetStationAround(TileArea ta, StationID closest_station, T **st)
00086 {
00087   /* check around to see if there's any stations there */
00088   TILE_LOOP(tile_cur, ta.w + 2, ta.h + 2, ta.tile - TileDiffXY(1, 1)) {
00089     if (IsTileType(tile_cur, MP_STATION)) {
00090       StationID t = GetStationIndex(tile_cur);
00091 
00092       if (closest_station == INVALID_STATION) {
00093         if (T::IsValidID(t)) closest_station = t;
00094       } else if (closest_station != t) {
00095         _error_message = STR_ERROR_ADJOINS_MORE_THAN_ONE_EXISTING;
00096         return false;
00097       }
00098     }
00099   }
00100   *st = (closest_station == INVALID_STATION) ? NULL : T::Get(closest_station);
00101   return true;
00102 }
00103 
00109 typedef bool (*CMSAMatcher)(TileIndex tile);
00110 
00117 static int CountMapSquareAround(TileIndex tile, CMSAMatcher cmp)
00118 {
00119   int num = 0;
00120 
00121   for (int dx = -3; dx <= 3; dx++) {
00122     for (int dy = -3; dy <= 3; dy++) {
00123       TileIndex t = TileAddWrap(tile, dx, dy);
00124       if (t != INVALID_TILE && cmp(t)) num++;
00125     }
00126   }
00127 
00128   return num;
00129 }
00130 
00136 static bool CMSAMine(TileIndex tile)
00137 {
00138   /* No industry */
00139   if (!IsTileType(tile, MP_INDUSTRY)) return false;
00140 
00141   const Industry *ind = Industry::GetByTile(tile);
00142 
00143   /* No extractive industry */
00144   if ((GetIndustrySpec(ind->type)->life_type & INDUSTRYLIFE_EXTRACTIVE) == 0) return false;
00145 
00146   for (uint i = 0; i < lengthof(ind->produced_cargo); i++) {
00147     /* The industry extracts something non-liquid, i.e. no oil or plastic, so it is a mine.
00148      * Also the production of passengers and mail is ignored. */
00149     if (ind->produced_cargo[i] != CT_INVALID &&
00150         (CargoSpec::Get(ind->produced_cargo[i])->classes & (CC_LIQUID | CC_PASSENGERS | CC_MAIL)) == 0) {
00151       return true;
00152     }
00153   }
00154 
00155   return false;
00156 }
00157 
00163 static bool CMSAWater(TileIndex tile)
00164 {
00165   return IsTileType(tile, MP_WATER) && IsWater(tile);
00166 }
00167 
00173 static bool CMSATree(TileIndex tile)
00174 {
00175   return IsTileType(tile, MP_TREES);
00176 }
00177 
00183 static bool CMSAForest(TileIndex tile)
00184 {
00185   /* No industry */
00186   if (!IsTileType(tile, MP_INDUSTRY)) return false;
00187 
00188   const Industry *ind = Industry::GetByTile(tile);
00189 
00190   /* No extractive industry */
00191   if ((GetIndustrySpec(ind->type)->life_type & INDUSTRYLIFE_ORGANIC) == 0) return false;
00192 
00193   for (uint i = 0; i < lengthof(ind->produced_cargo); i++) {
00194     /* The industry produces wood. */
00195     if (ind->produced_cargo[i] != CT_INVALID && CargoSpec::Get(ind->produced_cargo[i])->label == 'WOOD') return true;
00196   }
00197 
00198   return false;
00199 }
00200 
00201 #define M(x) ((x) - STR_SV_STNAME)
00202 
00203 enum StationNaming {
00204   STATIONNAMING_RAIL,
00205   STATIONNAMING_ROAD,
00206   STATIONNAMING_AIRPORT,
00207   STATIONNAMING_OILRIG,
00208   STATIONNAMING_DOCK,
00209   STATIONNAMING_HELIPORT,
00210 };
00211 
00213 struct StationNameInformation {
00214   uint32 free_names; 
00215   bool *indtypes;    
00216 };
00217 
00226 static bool FindNearIndustryName(TileIndex tile, void *user_data)
00227 {
00228   /* All already found industry types */
00229   StationNameInformation *sni = (StationNameInformation*)user_data;
00230   if (!IsTileType(tile, MP_INDUSTRY)) return false;
00231 
00232   /* If the station name is undefined it means that it doesn't name a station */
00233   IndustryType indtype = GetIndustryType(tile);
00234   if (GetIndustrySpec(indtype)->station_name == STR_UNDEFINED) return false;
00235 
00236   /* In all cases if an industry that provides a name is found two of
00237    * the standard names will be disabled. */
00238   sni->free_names &= ~(1 << M(STR_SV_STNAME_OILFIELD) | 1 << M(STR_SV_STNAME_MINES));
00239   return !sni->indtypes[indtype];
00240 }
00241 
00242 static StringID GenerateStationName(Station *st, TileIndex tile, StationNaming name_class)
00243 {
00244   static const uint32 _gen_station_name_bits[] = {
00245     0,                                       // STATIONNAMING_RAIL
00246     0,                                       // STATIONNAMING_ROAD
00247     1U << M(STR_SV_STNAME_AIRPORT),          // STATIONNAMING_AIRPORT
00248     1U << M(STR_SV_STNAME_OILFIELD),         // STATIONNAMING_OILRIG
00249     1U << M(STR_SV_STNAME_DOCKS),            // STATIONNAMING_DOCK
00250     1U << M(STR_SV_STNAME_HELIPORT),         // STATIONNAMING_HELIPORT
00251   };
00252 
00253   const Town *t = st->town;
00254   uint32 free_names = UINT32_MAX;
00255 
00256   bool indtypes[NUM_INDUSTRYTYPES];
00257   memset(indtypes, 0, sizeof(indtypes));
00258 
00259   const Station *s;
00260   FOR_ALL_STATIONS(s) {
00261     if (s != st && s->town == t) {
00262       if (s->indtype != IT_INVALID) {
00263         indtypes[s->indtype] = true;
00264         continue;
00265       }
00266       uint str = M(s->string_id);
00267       if (str <= 0x20) {
00268         if (str == M(STR_SV_STNAME_FOREST)) {
00269           str = M(STR_SV_STNAME_WOODS);
00270         }
00271         ClrBit(free_names, str);
00272       }
00273     }
00274   }
00275 
00276   TileIndex indtile = tile;
00277   StationNameInformation sni = { free_names, indtypes };
00278   if (CircularTileSearch(&indtile, 7, FindNearIndustryName, &sni)) {
00279     /* An industry has been found nearby */
00280     IndustryType indtype = GetIndustryType(indtile);
00281     const IndustrySpec *indsp = GetIndustrySpec(indtype);
00282     /* STR_NULL means it only disables oil rig/mines */
00283     if (indsp->station_name != STR_NULL) {
00284       st->indtype = indtype;
00285       return STR_SV_STNAME_FALLBACK;
00286     }
00287   }
00288 
00289   /* Oil rigs/mines name could be marked not free by looking for a near by industry. */
00290   free_names = sni.free_names;
00291 
00292   /* check default names */
00293   uint32 tmp = free_names & _gen_station_name_bits[name_class];
00294   if (tmp != 0) return STR_SV_STNAME + FindFirstBit(tmp);
00295 
00296   /* check mine? */
00297   if (HasBit(free_names, M(STR_SV_STNAME_MINES))) {
00298     if (CountMapSquareAround(tile, CMSAMine) >= 2) {
00299       return STR_SV_STNAME_MINES;
00300     }
00301   }
00302 
00303   /* check close enough to town to get central as name? */
00304   if (DistanceMax(tile, t->xy) < 8) {
00305     if (HasBit(free_names, M(STR_SV_STNAME))) return STR_SV_STNAME;
00306 
00307     if (HasBit(free_names, M(STR_SV_STNAME_CENTRAL))) return STR_SV_STNAME_CENTRAL;
00308   }
00309 
00310   /* Check lakeside */
00311   if (HasBit(free_names, M(STR_SV_STNAME_LAKESIDE)) &&
00312       DistanceFromEdge(tile) < 20 &&
00313       CountMapSquareAround(tile, CMSAWater) >= 5) {
00314     return STR_SV_STNAME_LAKESIDE;
00315   }
00316 
00317   /* Check woods */
00318   if (HasBit(free_names, M(STR_SV_STNAME_WOODS)) && (
00319         CountMapSquareAround(tile, CMSATree) >= 8 ||
00320         CountMapSquareAround(tile, CMSAForest) >= 2)
00321       ) {
00322     return _settings_game.game_creation.landscape == LT_TROPIC ? STR_SV_STNAME_FOREST : STR_SV_STNAME_WOODS;
00323   }
00324 
00325   /* check elevation compared to town */
00326   uint z = GetTileZ(tile);
00327   uint z2 = GetTileZ(t->xy);
00328   if (z < z2) {
00329     if (HasBit(free_names, M(STR_SV_STNAME_VALLEY))) return STR_SV_STNAME_VALLEY;
00330   } else if (z > z2) {
00331     if (HasBit(free_names, M(STR_SV_STNAME_HEIGHTS))) return STR_SV_STNAME_HEIGHTS;
00332   }
00333 
00334   /* check direction compared to town */
00335   static const int8 _direction_and_table[] = {
00336     ~( (1 << M(STR_SV_STNAME_WEST))  | (1 << M(STR_SV_STNAME_EAST)) | (1 << M(STR_SV_STNAME_NORTH)) ),
00337     ~( (1 << M(STR_SV_STNAME_SOUTH)) | (1 << M(STR_SV_STNAME_WEST)) | (1 << M(STR_SV_STNAME_NORTH)) ),
00338     ~( (1 << M(STR_SV_STNAME_SOUTH)) | (1 << M(STR_SV_STNAME_EAST)) | (1 << M(STR_SV_STNAME_NORTH)) ),
00339     ~( (1 << M(STR_SV_STNAME_SOUTH)) | (1 << M(STR_SV_STNAME_WEST)) | (1 << M(STR_SV_STNAME_EAST)) ),
00340   };
00341 
00342   free_names &= _direction_and_table[
00343     (TileX(tile) < TileX(t->xy)) +
00344     (TileY(tile) < TileY(t->xy)) * 2];
00345 
00346   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));
00347   return (tmp == 0) ? STR_SV_STNAME_FALLBACK : (STR_SV_STNAME + FindFirstBit(tmp));
00348 }
00349 #undef M
00350 
00356 static Station *GetClosestDeletedStation(TileIndex tile)
00357 {
00358   uint threshold = 8;
00359   Station *best_station = NULL;
00360   Station *st;
00361 
00362   FOR_ALL_STATIONS(st) {
00363     if (!st->IsInUse() && st->owner == _current_company) {
00364       uint cur_dist = DistanceManhattan(tile, st->xy);
00365 
00366       if (cur_dist < threshold) {
00367         threshold = cur_dist;
00368         best_station = st;
00369       }
00370     }
00371   }
00372 
00373   return best_station;
00374 }
00375 
00376 
00377 void Station::GetTileArea(TileArea *ta, StationType type) const
00378 {
00379   switch (type) {
00380     case STATION_RAIL:
00381       *ta = this->train_station;
00382       return;
00383 
00384     case STATION_AIRPORT:
00385       ta->tile = this->airport_tile;
00386       ta->w    = this->GetAirportSpec()->size_x;
00387       ta->h    = this->GetAirportSpec()->size_y;
00388       return;
00389 
00390     case STATION_TRUCK:
00391       *ta = this->truck_station;
00392       return;
00393 
00394     case STATION_BUS:
00395       *ta = this->bus_station;
00396       return;
00397 
00398     case STATION_DOCK:
00399     case STATION_OILRIG:
00400       ta->tile = this->dock_tile;
00401       break;
00402 
00403     default: NOT_REACHED();
00404   }
00405 
00406   ta->w = 1;
00407   ta->h = 1;
00408 }
00409 
00413 void Station::UpdateVirtCoord()
00414 {
00415   Point pt = RemapCoords2(TileX(this->xy) * TILE_SIZE, TileY(this->xy) * TILE_SIZE);
00416 
00417   pt.y -= 32;
00418   if ((this->facilities & FACIL_AIRPORT) && this->airport_type == AT_OILRIG) pt.y -= 16;
00419 
00420   SetDParam(0, this->index);
00421   SetDParam(1, this->facilities);
00422   this->sign.UpdatePosition(pt.x, pt.y, STR_VIEWPORT_STATION);
00423 
00424   SetWindowDirty(WC_STATION_VIEW, this->index);
00425 }
00426 
00428 void UpdateAllStationVirtCoords()
00429 {
00430   BaseStation *st;
00431 
00432   FOR_ALL_BASE_STATIONS(st) {
00433     st->UpdateVirtCoord();
00434   }
00435 }
00436 
00441 static uint GetAcceptanceMask(const Station *st)
00442 {
00443   uint mask = 0;
00444 
00445   for (CargoID i = 0; i < NUM_CARGO; i++) {
00446     if (HasBit(st->goods[i].acceptance_pickup, GoodsEntry::ACCEPTANCE)) mask |= 1 << i;
00447   }
00448   return mask;
00449 }
00450 
00454 static void ShowRejectOrAcceptNews(const Station *st, uint num_items, CargoID *cargo, StringID msg)
00455 {
00456   for (uint i = 0; i < num_items; i++) {
00457     SetDParam(i + 1, CargoSpec::Get(cargo[i])->name);
00458   }
00459 
00460   SetDParam(0, st->index);
00461   AddNewsItem(msg, NS_ACCEPTANCE, NR_STATION, st->index);
00462 }
00463 
00471 CargoArray GetProductionAroundTiles(TileIndex tile, int w, int h, int rad)
00472 {
00473   CargoArray produced;
00474 
00475   int x = TileX(tile);
00476   int y = TileY(tile);
00477 
00478   /* expand the region by rad tiles on each side
00479    * while making sure that we remain inside the board. */
00480   int x2 = min(x + w + rad, MapSizeX());
00481   int x1 = max(x - rad, 0);
00482 
00483   int y2 = min(y + h + rad, MapSizeY());
00484   int y1 = max(y - rad, 0);
00485 
00486   assert(x1 < x2);
00487   assert(y1 < y2);
00488   assert(w > 0);
00489   assert(h > 0);
00490 
00491   TileArea ta(TileXY(x1, y1), TileXY(x2 - 1, y2 - 1));
00492 
00493   /* Loop over all tiles to get the produced cargo of
00494    * everything except industries */
00495   TILE_AREA_LOOP(tile, ta) AddProducedCargo(tile, produced);
00496 
00497   /* Loop over the industries. They produce cargo for
00498    * anything that is within 'rad' from their bounding
00499    * box. As such if you have e.g. a oil well the tile
00500    * area loop might not hit an industry tile while
00501    * the industry would produce cargo for the station.
00502    */
00503   const Industry *i;
00504   FOR_ALL_INDUSTRIES(i) {
00505     if (!ta.Intersects(i->location)) continue;
00506 
00507     for (uint j = 0; j < lengthof(i->produced_cargo); j++) {
00508       CargoID cargo = i->produced_cargo[j];
00509       if (cargo != CT_INVALID) produced[cargo]++;
00510     }
00511   }
00512 
00513   return produced;
00514 }
00515 
00524 CargoArray GetAcceptanceAroundTiles(TileIndex tile, int w, int h, int rad, uint32 *always_accepted)
00525 {
00526   CargoArray acceptance;
00527   if (always_accepted != NULL) *always_accepted = 0;
00528 
00529   int x = TileX(tile);
00530   int y = TileY(tile);
00531 
00532   /* expand the region by rad tiles on each side
00533    * while making sure that we remain inside the board. */
00534   int x2 = min(x + w + rad, MapSizeX());
00535   int y2 = min(y + h + rad, MapSizeY());
00536   int x1 = max(x - rad, 0);
00537   int y1 = max(y - rad, 0);
00538 
00539   assert(x1 < x2);
00540   assert(y1 < y2);
00541   assert(w > 0);
00542   assert(h > 0);
00543 
00544   for (int yc = y1; yc != y2; yc++) {
00545     for (int xc = x1; xc != x2; xc++) {
00546       TileIndex tile = TileXY(xc, yc);
00547       AddAcceptedCargo(tile, acceptance, always_accepted);
00548     }
00549   }
00550 
00551   return acceptance;
00552 }
00553 
00558 void UpdateStationAcceptance(Station *st, bool show_msg)
00559 {
00560   /* old accepted goods types */
00561   uint old_acc = GetAcceptanceMask(st);
00562 
00563   /* And retrieve the acceptance. */
00564   CargoArray acceptance;
00565   if (!st->rect.IsEmpty()) {
00566     acceptance = GetAcceptanceAroundTiles(
00567       TileXY(st->rect.left, st->rect.top),
00568       st->rect.right  - st->rect.left + 1,
00569       st->rect.bottom - st->rect.top  + 1,
00570       st->GetCatchmentRadius(),
00571       &st->always_accepted
00572     );
00573   }
00574 
00575   /* Adjust in case our station only accepts fewer kinds of goods */
00576   for (CargoID i = 0; i < NUM_CARGO; i++) {
00577     uint amt = min(acceptance[i], 15);
00578 
00579     /* Make sure the station can accept the goods type. */
00580     bool is_passengers = IsCargoInClass(i, CC_PASSENGERS);
00581     if ((!is_passengers && !(st->facilities & ~FACIL_BUS_STOP)) ||
00582         (is_passengers && !(st->facilities & ~FACIL_TRUCK_STOP))) {
00583       amt = 0;
00584     }
00585 
00586     SB(st->goods[i].acceptance_pickup, GoodsEntry::ACCEPTANCE, 1, amt >= 8);
00587   }
00588 
00589   /* Only show a message in case the acceptance was actually changed. */
00590   uint new_acc = GetAcceptanceMask(st);
00591   if (old_acc == new_acc) return;
00592 
00593   /* show a message to report that the acceptance was changed? */
00594   if (show_msg && st->owner == _local_company && st->IsInUse()) {
00595     /* List of accept and reject strings for different number of
00596      * cargo types */
00597     static const StringID accept_msg[] = {
00598       STR_NEWS_STATION_NOW_ACCEPTS_CARGO,
00599       STR_NEWS_STATION_NOW_ACCEPTS_CARGO_AND_CARGO,
00600     };
00601     static const StringID reject_msg[] = {
00602       STR_NEWS_STATION_NO_LONGER_ACCEPTS_CARGO,
00603       STR_NEWS_STATION_NO_LONGER_ACCEPTS_CARGO_OR_CARGO,
00604     };
00605 
00606     /* Array of accepted and rejected cargo types */
00607     CargoID accepts[2] = { CT_INVALID, CT_INVALID };
00608     CargoID rejects[2] = { CT_INVALID, CT_INVALID };
00609     uint num_acc = 0;
00610     uint num_rej = 0;
00611 
00612     /* Test each cargo type to see if its acceptange has changed */
00613     for (CargoID i = 0; i < NUM_CARGO; i++) {
00614       if (HasBit(new_acc, i)) {
00615         if (!HasBit(old_acc, i) && num_acc < lengthof(accepts)) {
00616           /* New cargo is accepted */
00617           accepts[num_acc++] = i;
00618         }
00619       } else {
00620         if (HasBit(old_acc, i) && num_rej < lengthof(rejects)) {
00621           /* Old cargo is no longer accepted */
00622           rejects[num_rej++] = i;
00623         }
00624       }
00625     }
00626 
00627     /* Show news message if there are any changes */
00628     if (num_acc > 0) ShowRejectOrAcceptNews(st, num_acc, accepts, accept_msg[num_acc - 1]);
00629     if (num_rej > 0) ShowRejectOrAcceptNews(st, num_rej, rejects, reject_msg[num_rej - 1]);
00630   }
00631 
00632   /* redraw the station view since acceptance changed */
00633   SetWindowWidgetDirty(WC_STATION_VIEW, st->index, SVW_ACCEPTLIST);
00634 }
00635 
00636 static void UpdateStationSignCoord(BaseStation *st)
00637 {
00638   const StationRect *r = &st->rect;
00639 
00640   if (r->IsEmpty()) return; // no tiles belong to this station
00641 
00642   /* clamp sign coord to be inside the station rect */
00643   st->xy = TileXY(ClampU(TileX(st->xy), r->left, r->right), ClampU(TileY(st->xy), r->top, r->bottom));
00644   st->UpdateVirtCoord();
00645 }
00646 
00652 static void DeleteStationIfEmpty(BaseStation *st)
00653 {
00654   if (!st->IsInUse()) {
00655     st->delete_ctr = 0;
00656     InvalidateWindowData(WC_STATION_LIST, st->owner, 0);
00657   }
00658   /* station remains but it probably lost some parts - station sign should stay in the station boundaries */
00659   UpdateStationSignCoord(st);
00660 }
00661 
00662 CommandCost ClearTile_Station(TileIndex tile, DoCommandFlag flags);
00663 
00675 CommandCost CheckFlatLandBelow(TileIndex tile, uint w, uint h, DoCommandFlag flags, uint invalid_dirs, StationID *station, bool check_clear = true, RailType rt = INVALID_RAILTYPE, SmallVector<Train *, 4> *affected_vehicles = NULL)
00676 {
00677   CommandCost cost(EXPENSES_CONSTRUCTION);
00678   int allowed_z = -1;
00679 
00680   TILE_LOOP(tile_cur, w, h, tile) {
00681     if (MayHaveBridgeAbove(tile_cur) && IsBridgeAbove(tile_cur)) {
00682       return_cmd_error(STR_ERROR_MUST_DEMOLISH_BRIDGE_FIRST);
00683     }
00684 
00685     if (!EnsureNoVehicleOnGround(tile_cur)) return CMD_ERROR;
00686 
00687     uint z;
00688     Slope tileh = GetTileSlope(tile_cur, &z);
00689 
00690     /* Prohibit building if
00691      *   1) The tile is "steep" (i.e. stretches two height levels)
00692      *   2) The tile is non-flat and the build_on_slopes switch is disabled
00693      */
00694     if (IsSteepSlope(tileh) ||
00695         ((!_settings_game.construction.build_on_slopes) && tileh != SLOPE_FLAT)) {
00696       return_cmd_error(STR_ERROR_FLAT_LAND_REQUIRED);
00697     }
00698 
00699     int flat_z = z;
00700     if (tileh != SLOPE_FLAT) {
00701       /* need to check so the entrance to the station is not pointing at a slope.
00702        * This must be valid for all station tiles, as the user can remove single station tiles. */
00703       if ((HasBit(invalid_dirs, DIAGDIR_NE) && !(tileh & SLOPE_NE)) ||
00704           (HasBit(invalid_dirs, DIAGDIR_SE) && !(tileh & SLOPE_SE)) ||
00705           (HasBit(invalid_dirs, DIAGDIR_SW) && !(tileh & SLOPE_SW)) ||
00706           (HasBit(invalid_dirs, DIAGDIR_NW) && !(tileh & SLOPE_NW))) {
00707         return_cmd_error(STR_ERROR_FLAT_LAND_REQUIRED);
00708       }
00709       cost.AddCost(_price[PR_BUILD_FOUNDATION]);
00710       flat_z += TILE_HEIGHT;
00711     }
00712 
00713     /* get corresponding flat level and make sure that all parts of the station have the same level. */
00714     if (allowed_z == -1) {
00715       /* first tile */
00716       allowed_z = flat_z;
00717     } else if (allowed_z != flat_z) {
00718       return_cmd_error(STR_ERROR_FLAT_LAND_REQUIRED);
00719     }
00720 
00721     /* if station is set, then we have special handling to allow building on top of already existing stations.
00722      * so station points to INVALID_STATION if we can build on any station.
00723      * Or it points to a station if we're only allowed to build on exactly that station. */
00724     if (station != NULL && IsTileType(tile_cur, MP_STATION)) {
00725       if (!IsRailStation(tile_cur)) {
00726         return ClearTile_Station(tile_cur, DC_AUTO); // get error message
00727       } else {
00728         StationID st = GetStationIndex(tile_cur);
00729         if (*station == INVALID_STATION) {
00730           *station = st;
00731         } else if (*station != st) {
00732           return_cmd_error(STR_ERROR_ADJOINS_MORE_THAN_ONE_EXISTING);
00733         }
00734       }
00735     } else if (check_clear) {
00736       /* Rail type is only valid when building a railway station; in station to
00737        * build isn't a rail station it's INVALID_RAILTYPE. */
00738       if (rt != INVALID_RAILTYPE &&
00739           IsPlainRailTile(tile_cur) && !HasSignals(tile_cur) &&
00740           HasPowerOnRail(GetRailType(tile_cur), rt)) {
00741         /* Allow overbuilding if the tile:
00742          *  - has rail, but no signals
00743          *  - it has exactly one track
00744          *  - the track is in line with the station
00745          *  - the current rail type has power on the to-be-built type (e.g. convert normal rail to el rail)
00746          */
00747         TrackBits tracks = GetTrackBits(tile_cur);
00748         Track track = RemoveFirstTrack(&tracks);
00749         Track expected_track = HasBit(invalid_dirs, DIAGDIR_NE) ? TRACK_X : TRACK_Y;
00750 
00751         if (tracks == TRACK_BIT_NONE && track == expected_track) {
00752           /* Check for trains having a reservation for this tile. */
00753           if (HasBit(GetRailReservationTrackBits(tile_cur), track)) {
00754             Train *v = GetTrainForReservation(tile_cur, track);
00755             if (v != NULL && affected_vehicles != NULL) {
00756               *(*affected_vehicles).Append() = v;
00757             }
00758           }
00759           CommandCost ret = DoCommand(tile_cur, 0, track, flags, CMD_REMOVE_SINGLE_RAIL);
00760           if (ret.Failed()) return ret;
00761           cost.AddCost(ret);
00762           /* With flags & ~DC_EXEC CmdLandscapeClear would fail since the rail still exists */
00763           continue;
00764         }
00765       }
00766       CommandCost ret = DoCommand(tile_cur, 0, 0, flags, CMD_LANDSCAPE_CLEAR);
00767       if (ret.Failed()) return ret;
00768       cost.AddCost(ret);
00769     }
00770   }
00771 
00772   return cost;
00773 }
00774 
00782 bool CanExpandRailStation(const BaseStation *st, TileArea &new_ta, Axis axis)
00783 {
00784   TileArea cur_ta = st->train_station;
00785 
00786   if (_settings_game.station.nonuniform_stations) {
00787     /* determine new size of train station region.. */
00788     int x = min(TileX(cur_ta.tile), TileX(new_ta.tile));
00789     int y = min(TileY(cur_ta.tile), TileY(new_ta.tile));
00790     new_ta.w = max(TileX(cur_ta.tile) + cur_ta.w, TileX(new_ta.tile) + new_ta.w) - x;
00791     new_ta.h = max(TileY(cur_ta.tile) + cur_ta.h, TileY(new_ta.tile) + new_ta.h) - y;
00792     new_ta.tile = TileXY(x, y);
00793   } else {
00794     /* do not allow modifying non-uniform stations,
00795      * the uniform-stations code wouldn't handle it well */
00796     TILE_LOOP(t, cur_ta.w, cur_ta.h, cur_ta.tile) {
00797       if (!st->TileBelongsToRailStation(t)) { // there may be adjoined station
00798         _error_message = STR_ERROR_NONUNIFORM_STATIONS_DISALLOWED;
00799         return false;
00800       }
00801     }
00802 
00803     /* check so the orientation is the same */
00804     if (GetRailStationAxis(cur_ta.tile) != axis) {
00805       _error_message = STR_ERROR_NONUNIFORM_STATIONS_DISALLOWED;
00806       return false;
00807     }
00808 
00809     /* check if the new station adjoins the old station in either direction */
00810     if (cur_ta.w == new_ta.w && cur_ta.tile == new_ta.tile + TileDiffXY(0, new_ta.h)) {
00811       /* above */
00812       new_ta.h += cur_ta.h;
00813     } else if (cur_ta.w == new_ta.w && cur_ta.tile == new_ta.tile - TileDiffXY(0, cur_ta.h)) {
00814       /* below */
00815       new_ta.tile = cur_ta.tile;
00816       new_ta.h += new_ta.h;
00817     } else if (cur_ta.h == new_ta.h && cur_ta.tile == new_ta.tile + TileDiffXY(new_ta.w, 0)) {
00818       /* to the left */
00819       new_ta.w += cur_ta.w;
00820     } else if (cur_ta.h == new_ta.h && cur_ta.tile == new_ta.tile - TileDiffXY(cur_ta.w, 0)) {
00821       /* to the right */
00822       new_ta.tile = cur_ta.tile;
00823       new_ta.w += cur_ta.w;
00824     } else {
00825       _error_message = STR_ERROR_NONUNIFORM_STATIONS_DISALLOWED;
00826       return false;
00827     }
00828   }
00829   /* make sure the final size is not too big. */
00830   if (new_ta.w > _settings_game.station.station_spread || new_ta.h > _settings_game.station.station_spread) {
00831     _error_message = STR_ERROR_STATION_TOO_SPREAD_OUT;
00832     return false;
00833   }
00834 
00835   return true;
00836 }
00837 
00838 static inline byte *CreateSingle(byte *layout, int n)
00839 {
00840   int i = n;
00841   do *layout++ = 0; while (--i);
00842   layout[((n - 1) >> 1) - n] = 2;
00843   return layout;
00844 }
00845 
00846 static inline byte *CreateMulti(byte *layout, int n, byte b)
00847 {
00848   int i = n;
00849   do *layout++ = b; while (--i);
00850   if (n > 4) {
00851     layout[0 - n] = 0;
00852     layout[n - 1 - n] = 0;
00853   }
00854   return layout;
00855 }
00856 
00857 void GetStationLayout(byte *layout, int numtracks, int plat_len, const StationSpec *statspec)
00858 {
00859   if (statspec != NULL && statspec->lengths >= plat_len &&
00860       statspec->platforms[plat_len - 1] >= numtracks &&
00861       statspec->layouts[plat_len - 1][numtracks - 1]) {
00862     /* Custom layout defined, follow it. */
00863     memcpy(layout, statspec->layouts[plat_len - 1][numtracks - 1],
00864       plat_len * numtracks);
00865     return;
00866   }
00867 
00868   if (plat_len == 1) {
00869     CreateSingle(layout, numtracks);
00870   } else {
00871     if (numtracks & 1) layout = CreateSingle(layout, plat_len);
00872     numtracks >>= 1;
00873 
00874     while (--numtracks >= 0) {
00875       layout = CreateMulti(layout, plat_len, 4);
00876       layout = CreateMulti(layout, plat_len, 6);
00877     }
00878   }
00879 }
00880 
00892 template <class T, StringID error_message>
00893 CommandCost FindJoiningBaseStation(StationID existing_station, StationID station_to_join, bool adjacent, TileArea ta, T **st)
00894 {
00895   assert(*st == NULL);
00896   bool check_surrounding = true;
00897 
00898   if (_settings_game.station.adjacent_stations) {
00899     if (existing_station != INVALID_STATION) {
00900       if (adjacent && existing_station != station_to_join) {
00901         /* You can't build an adjacent station over the top of one that
00902          * already exists. */
00903         return_cmd_error(error_message);
00904       } else {
00905         /* Extend the current station, and don't check whether it will
00906          * be near any other stations. */
00907         *st = T::GetIfValid(existing_station);
00908         check_surrounding = (*st == NULL);
00909       }
00910     } else {
00911       /* There's no station here. Don't check the tiles surrounding this
00912        * one if the company wanted to build an adjacent station. */
00913       if (adjacent) check_surrounding = false;
00914     }
00915   }
00916 
00917   if (check_surrounding) {
00918     /* Make sure there are no similar stations around us. */
00919     if (!GetStationAround(ta, existing_station, st)) return CMD_ERROR;
00920   }
00921 
00922   /* Distant join */
00923   if (*st == NULL && station_to_join != INVALID_STATION) *st = T::GetIfValid(station_to_join);
00924 
00925   return CommandCost();
00926 }
00927 
00937 static CommandCost FindJoiningStation(StationID existing_station, StationID station_to_join, bool adjacent, TileArea ta, Station **st)
00938 {
00939   return FindJoiningBaseStation<Station, STR_ERROR_MUST_REMOVE_RAILWAY_STATION_FIRST>(existing_station, station_to_join, adjacent, ta, st);
00940 }
00941 
00951 CommandCost FindJoiningWaypoint(StationID existing_waypoint, StationID waypoint_to_join, bool adjacent, TileArea ta, Waypoint **wp)
00952 {
00953   return FindJoiningBaseStation<Waypoint, STR_ERROR_MUST_REMOVE_RAILWAYPOINT_FIRST>(existing_waypoint, waypoint_to_join, adjacent, ta, wp);
00954 }
00955 
00973 CommandCost CmdBuildRailStation(TileIndex tile_org, DoCommandFlag flags, uint32 p1, uint32 p2, const char *text)
00974 {
00975   /* Unpack parameters */
00976   RailType rt    = Extract<RailType, 0, 4>(p1);
00977   Axis axis      = Extract<Axis, 4, 1>(p1);
00978   byte numtracks = GB(p1,  8, 8);
00979   byte plat_len  = GB(p1, 16, 8);
00980   bool adjacent  = HasBit(p1, 24);
00981 
00982   StationClassID spec_class = Extract<StationClassID, 0, 8>(p2);
00983   byte spec_index           = GB(p2, 8, 8);
00984   StationID station_to_join = GB(p2, 16, 16);
00985 
00986   /* Does the authority allow this? */
00987   if (!CheckIfAuthorityAllowsNewStation(tile_org, flags)) return CMD_ERROR;
00988   if (!ValParamRailtype(rt)) return CMD_ERROR;
00989 
00990   /* Check if the given station class is valid */
00991   if ((uint)spec_class >= GetNumStationClasses() || spec_class == STAT_CLASS_WAYP) return CMD_ERROR;
00992   if (spec_index >= GetNumCustomStations(spec_class)) return CMD_ERROR;
00993   if (plat_len == 0 || numtracks == 0) return CMD_ERROR;
00994 
00995   int w_org, h_org;
00996   if (axis == AXIS_X) {
00997     w_org = plat_len;
00998     h_org = numtracks;
00999   } else {
01000     h_org = plat_len;
01001     w_org = numtracks;
01002   }
01003 
01004   bool reuse = (station_to_join != NEW_STATION);
01005   if (!reuse) station_to_join = INVALID_STATION;
01006   bool distant_join = (station_to_join != INVALID_STATION);
01007 
01008   if (distant_join && (!_settings_game.station.distant_join_stations || !Station::IsValidID(station_to_join))) return CMD_ERROR;
01009 
01010   if (h_org > _settings_game.station.station_spread || w_org > _settings_game.station.station_spread) return CMD_ERROR;
01011 
01012   /* these values are those that will be stored in train_tile and station_platforms */
01013   TileArea new_location(tile_org, w_org, h_org);
01014 
01015   /* Make sure the area below consists of clear tiles. (OR tiles belonging to a certain rail station) */
01016   StationID est = INVALID_STATION;
01017   SmallVector<Train *, 4> affected_vehicles;
01018   /* Clear the land below the station. */
01019   CommandCost cost = CheckFlatLandBelow(tile_org, w_org, h_org, flags, 5 << axis, _settings_game.station.nonuniform_stations ? &est : NULL, true, rt, &affected_vehicles);
01020   if (cost.Failed()) return cost;
01021   /* Add construction expenses. */
01022   cost.AddCost((numtracks * _price[PR_BUILD_STATION_RAIL] + _price[PR_BUILD_STATION_RAIL_LENGTH]) * plat_len);
01023   cost.AddCost(numtracks * plat_len * RailBuildCost(rt));
01024 
01025   Station *st = NULL;
01026   CommandCost ret = FindJoiningStation(est, station_to_join, adjacent, new_location, &st);
01027   if (ret.Failed()) return ret;
01028 
01029   /* See if there is a deleted station close to us. */
01030   if (st == NULL && reuse) st = GetClosestDeletedStation(tile_org);
01031 
01032   if (st != NULL) {
01033     /* Reuse an existing station. */
01034     if (st->owner != _current_company)
01035       return_cmd_error(STR_ERROR_TOO_CLOSE_TO_ANOTHER_STATION);
01036 
01037     if (st->train_station.tile != INVALID_TILE) {
01038       /* check if we want to expanding an already existing station? */
01039       if (!_settings_game.station.join_stations)
01040         return_cmd_error(STR_ERROR_TOO_CLOSE_TO_ANOTHER_RAILROAD);
01041       if (!CanExpandRailStation(st, new_location, axis))
01042         return CMD_ERROR;
01043     }
01044 
01045     /* XXX can't we pack this in the "else" part of the if above? */
01046     if (!st->rect.BeforeAddRect(tile_org, w_org, h_org, StationRect::ADD_TEST)) return CMD_ERROR;
01047   } else {
01048     /* allocate and initialize new station */
01049     if (!Station::CanAllocateItem()) return_cmd_error(STR_ERROR_TOO_MANY_STATIONS_LOADING);
01050 
01051     if (flags & DC_EXEC) {
01052       st = new Station(tile_org);
01053 
01054       st->town = ClosestTownFromTile(tile_org, UINT_MAX);
01055       st->string_id = GenerateStationName(st, tile_org, STATIONNAMING_RAIL);
01056 
01057       if (Company::IsValidID(_current_company)) {
01058         SetBit(st->town->have_ratings, _current_company);
01059       }
01060     }
01061   }
01062 
01063   /* Check if we can allocate a custom stationspec to this station */
01064   const StationSpec *statspec = GetCustomStationSpec(spec_class, spec_index);
01065   int specindex = AllocateSpecToStation(statspec, st, (flags & DC_EXEC) != 0);
01066   if (specindex == -1) return_cmd_error(STR_ERROR_TOO_MANY_STATION_SPECS);
01067 
01068   if (statspec != NULL) {
01069     /* Perform NewStation checks */
01070 
01071     /* Check if the station size is permitted */
01072     if (HasBit(statspec->disallowed_platforms, numtracks - 1) || HasBit(statspec->disallowed_lengths, plat_len - 1)) {
01073       return CMD_ERROR;
01074     }
01075 
01076     /* Check if the station is buildable */
01077     if (HasBit(statspec->callback_mask, CBM_STATION_AVAIL) && GB(GetStationCallback(CBID_STATION_AVAILABILITY, 0, 0, statspec, NULL, INVALID_TILE), 0, 8) == 0) {
01078       return CMD_ERROR;
01079     }
01080   }
01081 
01082   if (flags & DC_EXEC) {
01083     TileIndexDiff tile_delta;
01084     byte *layout_ptr;
01085     byte numtracks_orig;
01086     Track track;
01087 
01088     st->train_station = new_location;
01089     st->AddFacility(FACIL_TRAIN, new_location.tile);
01090 
01091     st->rect.BeforeAddRect(tile_org, w_org, h_org, StationRect::ADD_TRY);
01092 
01093     if (statspec != NULL) {
01094       /* Include this station spec's animation trigger bitmask
01095        * in the station's cached copy. */
01096       st->cached_anim_triggers |= statspec->anim_triggers;
01097     }
01098 
01099     tile_delta = (axis == AXIS_X ? TileDiffXY(1, 0) : TileDiffXY(0, 1));
01100     track = AxisToTrack(axis);
01101 
01102     layout_ptr = AllocaM(byte, numtracks * plat_len);
01103     GetStationLayout(layout_ptr, numtracks, plat_len, statspec);
01104 
01105     numtracks_orig = numtracks;
01106 
01107     do {
01108       TileIndex tile = tile_org;
01109       int w = plat_len;
01110       do {
01111         byte layout = *layout_ptr++;
01112         if (IsRailStationTile(tile) && HasStationReservation(tile)) {
01113           /* Check for trains having a reservation for this tile. */
01114           Train *v = GetTrainForReservation(tile, AxisToTrack(GetRailStationAxis(tile)));
01115           if (v != NULL) {
01116             FreeTrainTrackReservation(v);
01117             *affected_vehicles.Append() = v;
01118             if (IsRailStationTile(v->tile)) SetRailStationPlatformReservation(v->tile, TrackdirToExitdir(v->GetVehicleTrackdir()), false);
01119             for (; v->Next() != NULL; v = v->Next()) { }
01120             if (IsRailStationTile(v->tile)) SetRailStationPlatformReservation(v->tile, TrackdirToExitdir(ReverseTrackdir(v->GetVehicleTrackdir())), false);
01121           }
01122         }
01123 
01124         /* Remove animation if overbuilding */
01125         DeleteAnimatedTile(tile);
01126         byte old_specindex = HasStationTileRail(tile) ? GetCustomStationSpecIndex(tile) : 0;
01127         MakeRailStation(tile, st->owner, st->index, axis, layout & ~1, rt);
01128         /* Free the spec if we overbuild something */
01129         DeallocateSpecFromStation(st, old_specindex);
01130 
01131         SetCustomStationSpecIndex(tile, specindex);
01132         SetStationTileRandomBits(tile, GB(Random(), 0, 4));
01133         SetStationAnimationFrame(tile, 0);
01134 
01135         if (statspec != NULL) {
01136           /* Use a fixed axis for GetPlatformInfo as our platforms / numtracks are always the right way around */
01137           uint32 platinfo = GetPlatformInfo(AXIS_X, 0, plat_len, numtracks_orig, plat_len - w, numtracks_orig - numtracks, false);
01138 
01139           /* As the station is not yet completely finished, the station does not yet exist. */
01140           uint16 callback = GetStationCallback(CBID_STATION_TILE_LAYOUT, platinfo, 0, statspec, NULL, tile);
01141           if (callback != CALLBACK_FAILED && callback < 8) SetStationGfx(tile, (callback & ~1) + axis);
01142 
01143           /* Trigger station animation -- after building? */
01144           StationAnimationTrigger(st, tile, STAT_ANIM_BUILT);
01145         }
01146 
01147         tile += tile_delta;
01148       } while (--w);
01149       AddTrackToSignalBuffer(tile_org, track, _current_company);
01150       YapfNotifyTrackLayoutChange(tile_org, track);
01151       tile_org += tile_delta ^ TileDiffXY(1, 1); // perpendicular to tile_delta
01152     } while (--numtracks);
01153 
01154     for (uint i = 0; i < affected_vehicles.Length(); ++i) {
01155       /* Restore reservations of trains. */
01156       Train *v = affected_vehicles[i];
01157       if (IsRailStationTile(v->tile)) SetRailStationPlatformReservation(v->tile, TrackdirToExitdir(v->GetVehicleTrackdir()), true);
01158       TryPathReserve(v, true, true);
01159       for (; v->Next() != NULL; v = v->Next()) { }
01160       if (IsRailStationTile(v->tile)) SetRailStationPlatformReservation(v->tile, TrackdirToExitdir(ReverseTrackdir(v->GetVehicleTrackdir())), true);
01161     }
01162 
01163     st->MarkTilesDirty(false);
01164     st->UpdateVirtCoord();
01165     UpdateStationAcceptance(st, false);
01166     st->RecomputeIndustriesNear();
01167     InvalidateWindowData(WC_SELECT_STATION, 0, 0);
01168     InvalidateWindowData(WC_STATION_LIST, st->owner, 0);
01169     SetWindowWidgetDirty(WC_STATION_VIEW, st->index, SVW_TRAINS);
01170   }
01171 
01172   return cost;
01173 }
01174 
01175 static void MakeRailStationAreaSmaller(BaseStation *st)
01176 {
01177   TileArea ta = st->train_station;
01178 
01179 restart:
01180 
01181   /* too small? */
01182   if (ta.w != 0 && ta.h != 0) {
01183     /* check the left side, x = constant, y changes */
01184     for (uint i = 0; !st->TileBelongsToRailStation(ta.tile + TileDiffXY(0, i));) {
01185       /* the left side is unused? */
01186       if (++i == ta.h) {
01187         ta.tile += TileDiffXY(1, 0);
01188         ta.w--;
01189         goto restart;
01190       }
01191     }
01192 
01193     /* check the right side, x = constant, y changes */
01194     for (uint i = 0; !st->TileBelongsToRailStation(ta.tile + TileDiffXY(ta.w - 1, i));) {
01195       /* the right side is unused? */
01196       if (++i == ta.h) {
01197         ta.w--;
01198         goto restart;
01199       }
01200     }
01201 
01202     /* check the upper side, y = constant, x changes */
01203     for (uint i = 0; !st->TileBelongsToRailStation(ta.tile + TileDiffXY(i, 0));) {
01204       /* the left side is unused? */
01205       if (++i == ta.w) {
01206         ta.tile += TileDiffXY(0, 1);
01207         ta.h--;
01208         goto restart;
01209       }
01210     }
01211 
01212     /* check the lower side, y = constant, x changes */
01213     for (uint i = 0; !st->TileBelongsToRailStation(ta.tile + TileDiffXY(i, ta.h - 1));) {
01214       /* the left side is unused? */
01215       if (++i == ta.w) {
01216         ta.h--;
01217         goto restart;
01218       }
01219     }
01220   } else {
01221     ta.Clear();
01222   }
01223 
01224   st->train_station = ta;
01225 }
01226 
01237 template <class T>
01238 CommandCost RemoveFromRailBaseStation(TileArea ta, SmallVector<T *, 4> &affected_stations, DoCommandFlag flags, Money removal_cost, bool keep_rail)
01239 {
01240   /* Count of the number of tiles removed */
01241   int quantity = 0;
01242   CommandCost total_cost(EXPENSES_CONSTRUCTION);
01243 
01244   /* Do the action for every tile into the area */
01245   TILE_AREA_LOOP(tile, ta) {
01246     /* Make sure the specified tile is a rail station */
01247     if (!HasStationTileRail(tile)) continue;
01248 
01249     /* If there is a vehicle on ground, do not allow to remove (flood) the tile */
01250     if (!EnsureNoVehicleOnGround(tile)) continue;
01251 
01252     /* Check ownership of station */
01253     T *st = T::GetByTile(tile);
01254     if (st == NULL) continue;
01255     if (_current_company != OWNER_WATER && !CheckOwnership(st->owner)) continue;
01256 
01257     /* Do not allow removing from stations if non-uniform stations are not enabled
01258      * The check must be here to give correct error message
01259      */
01260     if (!_settings_game.station.nonuniform_stations) return_cmd_error(STR_ERROR_NONUNIFORM_STATIONS_DISALLOWED);
01261 
01262     /* If we reached here, the tile is valid so increase the quantity of tiles we will remove */
01263     quantity++;
01264 
01265     if (flags & DC_EXEC) {
01266       /* read variables before the station tile is removed */
01267       uint specindex = GetCustomStationSpecIndex(tile);
01268       Track track = GetRailStationTrack(tile);
01269       Owner owner = GetTileOwner(tile);
01270       RailType rt = GetRailType(tile);
01271       Train *v = NULL;
01272 
01273       if (HasStationReservation(tile)) {
01274         v = GetTrainForReservation(tile, track);
01275         if (v != NULL) {
01276           /* Free train reservation. */
01277           FreeTrainTrackReservation(v);
01278           if (IsRailStationTile(v->tile)) SetRailStationPlatformReservation(v->tile, TrackdirToExitdir(v->GetVehicleTrackdir()), false);
01279           Vehicle *temp = v;
01280           for (; temp->Next() != NULL; temp = temp->Next()) { }
01281           if (IsRailStationTile(temp->tile)) SetRailStationPlatformReservation(temp->tile, TrackdirToExitdir(ReverseTrackdir(temp->GetVehicleTrackdir())), false);
01282         }
01283       }
01284 
01285       DoClearSquare(tile);
01286       if (keep_rail) MakeRailNormal(tile, owner, TrackToTrackBits(track), rt);
01287 
01288       st->rect.AfterRemoveTile(st, tile);
01289       AddTrackToSignalBuffer(tile, track, owner);
01290       YapfNotifyTrackLayoutChange(tile, track);
01291 
01292       DeallocateSpecFromStation(st, specindex);
01293 
01294       affected_stations.Include(st);
01295 
01296       if (v != NULL) {
01297         /* Restore station reservation. */
01298         if (IsRailStationTile(v->tile)) SetRailStationPlatformReservation(v->tile, TrackdirToExitdir(v->GetVehicleTrackdir()), true);
01299         TryPathReserve(v, true, true);
01300         for (; v->Next() != NULL; v = v->Next()) { }
01301         if (IsRailStationTile(v->tile)) SetRailStationPlatformReservation(v->tile, TrackdirToExitdir(ReverseTrackdir(v->GetVehicleTrackdir())), true);
01302       }
01303     }
01304     if (keep_rail) {
01305       /* Don't refund the 'steel' of the track! */
01306       total_cost.AddCost(-_price[PR_CLEAR_RAIL]);
01307     }
01308   }
01309 
01310   if (quantity == 0) return CMD_ERROR;
01311 
01312   for (T **stp = affected_stations.Begin(); stp != affected_stations.End(); stp++) {
01313     T *st = *stp;
01314 
01315     /* now we need to make the "spanned" area of the railway station smaller
01316      * if we deleted something at the edges.
01317      * we also need to adjust train_tile. */
01318     MakeRailStationAreaSmaller(st);
01319     UpdateStationSignCoord(st);
01320 
01321     /* if we deleted the whole station, delete the train facility. */
01322     if (st->train_station.tile == INVALID_TILE) {
01323       st->facilities &= ~FACIL_TRAIN;
01324       SetWindowWidgetDirty(WC_STATION_VIEW, st->index, SVW_TRAINS);
01325       st->UpdateVirtCoord();
01326       DeleteStationIfEmpty(st);
01327     }
01328   }
01329 
01330   total_cost.AddCost(quantity * removal_cost);
01331   return total_cost;
01332 }
01333 
01344 CommandCost CmdRemoveFromRailStation(TileIndex start, DoCommandFlag flags, uint32 p1, uint32 p2, const char *text)
01345 {
01346   TileIndex end = p1 == 0 ? start : p1;
01347   if (start >= MapSize() || end >= MapSize()) return CMD_ERROR;
01348 
01349   TileArea ta(start, end);
01350   SmallVector<Station *, 4> affected_stations;
01351 
01352   CommandCost ret = RemoveFromRailBaseStation(ta, affected_stations, flags, _price[PR_CLEAR_STATION_RAIL], HasBit(p2, 0));
01353   if (ret.Failed()) return ret;
01354 
01355   /* Do all station specific functions here. */
01356   for (Station **stp = affected_stations.Begin(); stp != affected_stations.End(); stp++) {
01357     Station *st = *stp;
01358 
01359     if (st->train_station.tile == INVALID_TILE) SetWindowWidgetDirty(WC_STATION_VIEW, st->index, SVW_TRAINS);
01360     st->MarkTilesDirty(false);
01361     st->RecomputeIndustriesNear();
01362   }
01363 
01364   /* Now apply the rail cost to the number that we deleted */
01365   return ret;
01366 }
01367 
01378 CommandCost CmdRemoveFromRailWaypoint(TileIndex start, DoCommandFlag flags, uint32 p1, uint32 p2, const char *text)
01379 {
01380   TileIndex end = p1 == 0 ? start : p1;
01381   if (start >= MapSize() || end >= MapSize()) return CMD_ERROR;
01382 
01383   TileArea ta(start, end);
01384   SmallVector<Waypoint *, 4> affected_stations;
01385 
01386   return RemoveFromRailBaseStation(ta, affected_stations, flags, _price[PR_CLEAR_WAYPOINT_RAIL], HasBit(p2, 0));
01387 }
01388 
01389 
01397 template <class T>
01398 CommandCost RemoveRailStation(T *st, DoCommandFlag flags)
01399 {
01400   /* Current company owns the station? */
01401   if (_current_company != OWNER_WATER && !CheckOwnership(st->owner)) return CMD_ERROR;
01402 
01403   /* determine width and height of platforms */
01404   TileArea ta = st->train_station;
01405 
01406   assert(ta.w != 0 && ta.h != 0);
01407 
01408   CommandCost cost(EXPENSES_CONSTRUCTION);
01409   /* clear all areas of the station */
01410   TILE_AREA_LOOP(tile, ta) {
01411     /* for nonuniform stations, only remove tiles that are actually train station tiles */
01412     if (!st->TileBelongsToRailStation(tile)) continue;
01413 
01414     if (!EnsureNoVehicleOnGround(tile)) return CMD_ERROR;
01415 
01416     cost.AddCost(_price[PR_CLEAR_STATION_RAIL]);
01417     if (flags & DC_EXEC) {
01418       /* read variables before the station tile is removed */
01419       Track track = GetRailStationTrack(tile);
01420       Owner owner = GetTileOwner(tile); // _current_company can be OWNER_WATER
01421       Train *v = NULL;
01422       if (HasStationReservation(tile)) {
01423         v = GetTrainForReservation(tile, track);
01424         if (v != NULL) FreeTrainTrackReservation(v);
01425       }
01426       DoClearSquare(tile);
01427       AddTrackToSignalBuffer(tile, track, owner);
01428       YapfNotifyTrackLayoutChange(tile, track);
01429       if (v != NULL) TryPathReserve(v, true);
01430     }
01431   }
01432 
01433   if (flags & DC_EXEC) {
01434     st->rect.AfterRemoveRect(st, st->train_station.tile, st->train_station.w, st->train_station.h);
01435 
01436     st->train_station.Clear();
01437 
01438     st->facilities &= ~FACIL_TRAIN;
01439 
01440     free(st->speclist);
01441     st->num_specs = 0;
01442     st->speclist  = NULL;
01443     st->cached_anim_triggers = 0;
01444 
01445     SetWindowWidgetDirty(WC_STATION_VIEW, st->index, SVW_TRAINS);
01446     st->UpdateVirtCoord();
01447     DeleteStationIfEmpty(st);
01448   }
01449 
01450   return cost;
01451 }
01452 
01459 static CommandCost RemoveRailStation(TileIndex tile, DoCommandFlag flags)
01460 {
01461   /* if there is flooding and non-uniform stations are enabled, remove platforms tile by tile */
01462   if (_current_company == OWNER_WATER && _settings_game.station.nonuniform_stations) {
01463     return DoCommand(tile, 0, 0, DC_EXEC, CMD_REMOVE_FROM_RAIL_STATION);
01464   }
01465 
01466   Station *st = Station::GetByTile(tile);
01467   CommandCost cost = RemoveRailStation(st, flags);
01468 
01469   if (flags & DC_EXEC) st->RecomputeIndustriesNear();
01470 
01471   return cost;
01472 }
01473 
01480 static CommandCost RemoveRailWaypoint(TileIndex tile, DoCommandFlag flags)
01481 {
01482   /* if there is flooding and non-uniform stations are enabled, remove waypoints tile by tile */
01483   if (_current_company == OWNER_WATER && _settings_game.station.nonuniform_stations) {
01484     return DoCommand(tile, 0, 0, DC_EXEC, CMD_REMOVE_FROM_RAIL_WAYPOINT);
01485   }
01486 
01487   return RemoveRailStation(Waypoint::GetByTile(tile), flags);
01488 }
01489 
01490 
01496 static RoadStop **FindRoadStopSpot(bool truck_station, Station *st)
01497 {
01498   RoadStop **primary_stop = (truck_station) ? &st->truck_stops : &st->bus_stops;
01499 
01500   if (*primary_stop == NULL) {
01501     /* we have no roadstop of the type yet, so write a "primary stop" */
01502     return primary_stop;
01503   } else {
01504     /* there are stops already, so append to the end of the list */
01505     RoadStop *stop = *primary_stop;
01506     while (stop->next != NULL) stop = stop->next;
01507     return &stop->next;
01508   }
01509 }
01510 
01523 CommandCost CmdBuildRoadStop(TileIndex tile, DoCommandFlag flags, uint32 p1, uint32 p2, const char *text)
01524 {
01525   bool type = HasBit(p2, 0);
01526   bool is_drive_through = HasBit(p2, 1);
01527   bool build_over_road  = is_drive_through && IsNormalRoadTile(tile);
01528   RoadTypes rts = Extract<RoadTypes, 2, 2>(p2);
01529   StationID station_to_join = GB(p2, 16, 16);
01530   bool reuse = (station_to_join != NEW_STATION);
01531   if (!reuse) station_to_join = INVALID_STATION;
01532   bool distant_join = (station_to_join != INVALID_STATION);
01533   Owner tram_owner = _current_company;
01534   Owner road_owner = _current_company;
01535 
01536   if (distant_join && (!_settings_game.station.distant_join_stations || !Station::IsValidID(station_to_join))) return CMD_ERROR;
01537 
01538   if (!HasExactlyOneBit(rts) || !HasRoadTypesAvail(_current_company, rts)) return CMD_ERROR;
01539 
01540   /* Trams only have drive through stops */
01541   if (!is_drive_through && HasBit(rts, ROADTYPE_TRAM)) return CMD_ERROR;
01542 
01543   /* Saveguard the parameters */
01544   if (!IsValidDiagDirection((DiagDirection)p1)) return CMD_ERROR;
01545   /* If it is a drive-through stop check for valid axis */
01546   if (is_drive_through && !IsValidAxis((Axis)p1)) return CMD_ERROR;
01547   /* Road bits in the wrong direction */
01548   if (build_over_road && (GetAllRoadBits(tile) & ((Axis)p1 == AXIS_X ? ROAD_Y : ROAD_X)) != 0) return_cmd_error(STR_ERROR_DRIVE_THROUGH_DIRECTION);
01549 
01550   if (!CheckIfAuthorityAllowsNewStation(tile, flags)) return CMD_ERROR;
01551 
01552   RoadTypes cur_rts = IsNormalRoadTile(tile) ? GetRoadTypes(tile) : ROADTYPES_NONE;
01553   uint num_roadbits = 0;
01554   /* Not allowed to build over this road */
01555   if (build_over_road) {
01556     /* there is a road, check if we can build road+tram stop over it */
01557     if (HasBit(cur_rts, ROADTYPE_ROAD)) {
01558       road_owner = GetRoadOwner(tile, ROADTYPE_ROAD);
01559       if (road_owner == OWNER_TOWN) {
01560         if (!_settings_game.construction.road_stop_on_town_road) return_cmd_error(STR_ERROR_DRIVE_THROUGH_ON_TOWN_ROAD);
01561       } else if (!_settings_game.construction.road_stop_on_competitor_road && road_owner != OWNER_NONE && !CheckOwnership(road_owner)) {
01562         return CMD_ERROR;
01563       }
01564       num_roadbits += CountBits(GetRoadBits(tile, ROADTYPE_ROAD));
01565     }
01566 
01567     /* there is a tram, check if we can build road+tram stop over it */
01568     if (HasBit(cur_rts, ROADTYPE_TRAM)) {
01569       tram_owner = GetRoadOwner(tile, ROADTYPE_TRAM);
01570       if (!_settings_game.construction.road_stop_on_competitor_road && tram_owner != OWNER_NONE && !CheckOwnership(tram_owner)) {
01571         return CMD_ERROR;
01572       }
01573       num_roadbits += CountBits(GetRoadBits(tile, ROADTYPE_TRAM));
01574     }
01575 
01576     /* Don't allow building the roadstop when vehicles are already driving on it */
01577     if (!EnsureNoVehicleOnGround(tile)) return CMD_ERROR;
01578 
01579     /* Do not remove roadtypes! */
01580     rts |= cur_rts;
01581   }
01582 
01583   CommandCost cost = CheckFlatLandBelow(tile, 1, 1, flags, is_drive_through ? 5 << p1 : 1 << p1, NULL, !build_over_road);
01584   if (cost.Failed()) return cost;
01585   uint roadbits_to_build = CountBits(rts) * 2 - num_roadbits;
01586   cost.AddCost(_price[PR_BUILD_ROAD] * roadbits_to_build);
01587 
01588   Station *st = NULL;
01589   CommandCost ret = FindJoiningStation(INVALID_STATION, station_to_join, HasBit(p2, 5), TileArea(tile, 1, 1), &st);
01590   if (ret.Failed()) return ret;
01591 
01592   /* Find a deleted station close to us */
01593   if (st == NULL && reuse) st = GetClosestDeletedStation(tile);
01594 
01595   /* give us a road stop in the list, and check if something went wrong */
01596   if (!RoadStop::CanAllocateItem()) return_cmd_error(type ? STR_ERROR_TOO_MANY_TRUCK_STOPS : STR_ERROR_TOO_MANY_BUS_STOPS);
01597 
01598   if (st != NULL) {
01599     if (st->owner != _current_company) {
01600       return_cmd_error(STR_ERROR_TOO_CLOSE_TO_ANOTHER_STATION);
01601     }
01602 
01603     if (!st->rect.BeforeAddTile(tile, StationRect::ADD_TEST)) return CMD_ERROR;
01604   } else {
01605     /* allocate and initialize new station */
01606     if (!Station::CanAllocateItem()) return_cmd_error(STR_ERROR_TOO_MANY_STATIONS_LOADING);
01607 
01608     if (flags & DC_EXEC) {
01609       st = new Station(tile);
01610 
01611       st->town = ClosestTownFromTile(tile, UINT_MAX);
01612       st->string_id = GenerateStationName(st, tile, STATIONNAMING_ROAD);
01613 
01614       if (Company::IsValidID(_current_company)) {
01615         SetBit(st->town->have_ratings, _current_company);
01616       }
01617     }
01618   }
01619 
01620   cost.AddCost(_price[type ? PR_BUILD_STATION_TRUCK : PR_BUILD_STATION_BUS]);
01621 
01622   if (flags & DC_EXEC) {
01623     RoadStop *road_stop = new RoadStop(tile);
01624     /* Insert into linked list of RoadStops */
01625     RoadStop **currstop = FindRoadStopSpot(type, st);
01626     *currstop = road_stop;
01627 
01628     if (type) {
01629       st->truck_station.Add(tile);
01630     } else {
01631       st->bus_station.Add(tile);
01632     }
01633 
01634     /* initialize an empty station */
01635     st->AddFacility((type) ? FACIL_TRUCK_STOP : FACIL_BUS_STOP, tile);
01636 
01637     st->rect.BeforeAddTile(tile, StationRect::ADD_TRY);
01638 
01639     RoadStopType rs_type = type ? ROADSTOP_TRUCK : ROADSTOP_BUS;
01640     if (is_drive_through) {
01641       MakeDriveThroughRoadStop(tile, st->owner, road_owner, tram_owner, st->index, rs_type, rts, (Axis)p1);
01642       road_stop->MakeDriveThrough();
01643     } else {
01644       MakeRoadStop(tile, st->owner, st->index, rs_type, rts, (DiagDirection)p1);
01645     }
01646 
01647     st->UpdateVirtCoord();
01648     UpdateStationAcceptance(st, false);
01649     st->RecomputeIndustriesNear();
01650     InvalidateWindowData(WC_SELECT_STATION, 0, 0);
01651     InvalidateWindowData(WC_STATION_LIST, st->owner, 0);
01652     SetWindowWidgetDirty(WC_STATION_VIEW, st->index, SVW_ROADVEHS);
01653   }
01654   return cost;
01655 }
01656 
01657 
01658 static Vehicle *ClearRoadStopStatusEnum(Vehicle *v, void *)
01659 {
01660   if (v->type == VEH_ROAD) {
01661     /* Okay... we are a road vehicle on a drive through road stop.
01662      * But that road stop has just been removed, so we need to make
01663      * sure we are in a valid state... however, vehicles can also
01664      * turn on road stop tiles, so only clear the 'road stop' state
01665      * bits and only when the state was 'in road stop', otherwise
01666      * we'll end up clearing the turn around bits. */
01667     RoadVehicle *rv = RoadVehicle::From(v);
01668     if (HasBit(rv->state, RVS_IN_DT_ROAD_STOP)) rv->state &= RVSB_ROAD_STOP_TRACKDIR_MASK;
01669   }
01670 
01671   return NULL;
01672 }
01673 
01674 
01681 static CommandCost RemoveRoadStop(TileIndex tile, DoCommandFlag flags)
01682 {
01683   Station *st = Station::GetByTile(tile);
01684 
01685   if (_current_company != OWNER_WATER && !CheckOwnership(st->owner)) {
01686     return CMD_ERROR;
01687   }
01688 
01689   bool is_truck = IsTruckStop(tile);
01690 
01691   RoadStop **primary_stop;
01692   RoadStop *cur_stop;
01693   if (is_truck) { // truck stop
01694     primary_stop = &st->truck_stops;
01695     cur_stop = RoadStop::GetByTile(tile, ROADSTOP_TRUCK);
01696   } else {
01697     primary_stop = &st->bus_stops;
01698     cur_stop = RoadStop::GetByTile(tile, ROADSTOP_BUS);
01699   }
01700 
01701   assert(cur_stop != NULL);
01702 
01703   /* don't do the check for drive-through road stops when company bankrupts */
01704   if (IsDriveThroughStopTile(tile) && (flags & DC_BANKRUPT)) {
01705     /* remove the 'going through road stop' status from all vehicles on that tile */
01706     if (flags & DC_EXEC) FindVehicleOnPos(tile, NULL, &ClearRoadStopStatusEnum);
01707   } else {
01708     if (!EnsureNoVehicleOnGround(tile)) return CMD_ERROR;
01709   }
01710 
01711   if (flags & DC_EXEC) {
01712     if (*primary_stop == cur_stop) {
01713       /* removed the first stop in the list */
01714       *primary_stop = cur_stop->next;
01715       /* removed the only stop? */
01716       if (*primary_stop == NULL) {
01717         st->facilities &= (is_truck ? ~FACIL_TRUCK_STOP : ~FACIL_BUS_STOP);
01718       }
01719     } else {
01720       /* tell the predecessor in the list to skip this stop */
01721       RoadStop *pred = *primary_stop;
01722       while (pred->next != cur_stop) pred = pred->next;
01723       pred->next = cur_stop->next;
01724     }
01725 
01726     if (IsDriveThroughStopTile(tile)) {
01727       /* Clears the tile for us */
01728       cur_stop->ClearDriveThrough();
01729     } else {
01730       DoClearSquare(tile);
01731     }
01732 
01733     SetWindowWidgetDirty(WC_STATION_VIEW, st->index, SVW_ROADVEHS);
01734     delete cur_stop;
01735 
01736     /* Make sure no vehicle is going to the old roadstop */
01737     RoadVehicle *v;
01738     FOR_ALL_ROADVEHICLES(v) {
01739       if (v->First() == v && v->current_order.IsType(OT_GOTO_STATION) &&
01740           v->dest_tile == tile) {
01741         v->dest_tile = v->GetOrderStationLocation(st->index);
01742       }
01743     }
01744 
01745     st->rect.AfterRemoveTile(st, tile);
01746 
01747     st->UpdateVirtCoord();
01748     st->RecomputeIndustriesNear();
01749     DeleteStationIfEmpty(st);
01750 
01751     /* Update the tile area of the truck/bus stop */
01752     if (is_truck) {
01753       st->truck_station.Clear();
01754       for (const RoadStop *rs = st->truck_stops; rs != NULL; rs = rs->next) st->truck_station.Add(rs->xy);
01755     } else {
01756       st->bus_station.Clear();
01757       for (const RoadStop *rs = st->bus_stops; rs != NULL; rs = rs->next) st->bus_station.Add(rs->xy);
01758     }
01759   }
01760 
01761   return CommandCost(EXPENSES_CONSTRUCTION, _price[is_truck ? PR_CLEAR_STATION_TRUCK : PR_CLEAR_STATION_BUS]);
01762 }
01763 
01772 CommandCost CmdRemoveRoadStop(TileIndex tile, DoCommandFlag flags, uint32 p1, uint32 p2, const char *text)
01773 {
01774   /* Make sure the specified tile is a road stop of the correct type */
01775   if (!IsTileType(tile, MP_STATION) || !IsRoadStop(tile) || (uint32)GetRoadStopType(tile) != GB(p2, 0, 1)) return CMD_ERROR;
01776 
01777   /* Save the stop info before it is removed */
01778   bool is_drive_through = IsDriveThroughStopTile(tile);
01779   RoadTypes rts = GetRoadTypes(tile);
01780   RoadBits road_bits = IsDriveThroughStopTile(tile) ?
01781       ((GetRoadStopDir(tile) == DIAGDIR_NE) ? ROAD_X : ROAD_Y) :
01782       DiagDirToRoadBits(GetRoadStopDir(tile));
01783 
01784   Owner road_owner = GetRoadOwner(tile, ROADTYPE_ROAD);
01785   Owner tram_owner = GetRoadOwner(tile, ROADTYPE_TRAM);
01786   CommandCost ret = RemoveRoadStop(tile, flags);
01787 
01788   /* If the stop was a drive-through stop replace the road */
01789   if ((flags & DC_EXEC) && ret.Succeeded() && is_drive_through) {
01790     /* Rebuild the drive throuhg road stop. As a road stop can only be
01791      * removed by the owner of the roadstop, _current_company is the
01792      * owner of the road stop. */
01793     MakeRoadNormal(tile, road_bits, rts, ClosestTownFromTile(tile, UINT_MAX)->index,
01794         road_owner, tram_owner);
01795   }
01796 
01797   return ret;
01798 }
01799 
01807 static uint GetMinimalAirportDistanceToTile(const AirportSpec *as, TileIndex town_tile, TileIndex airport_tile)
01808 {
01809   uint ttx = TileX(town_tile); // X, Y of town
01810   uint tty = TileY(town_tile);
01811 
01812   uint atx = TileX(airport_tile); // X, Y of northern airport corner
01813   uint aty = TileY(airport_tile);
01814 
01815   uint btx = TileX(airport_tile) + as->size_x - 1; // X, Y of southern corner
01816   uint bty = TileY(airport_tile) + as->size_y - 1;
01817 
01818   /* if ttx < atx, dx = atx - ttx
01819    * if atx <= ttx <= btx, dx = 0
01820    * else, dx = ttx - btx (similiar for dy) */
01821   uint dx = ttx < atx ? atx - ttx : (ttx <= btx ? 0 : ttx - btx);
01822   uint dy = tty < aty ? aty - tty : (tty <= bty ? 0 : tty - bty);
01823 
01824   return dx + dy;
01825 }
01826 
01835 uint8 GetAirportNoiseLevelForTown(const AirportSpec *as, TileIndex town_tile, TileIndex tile)
01836 {
01837   /* 0 cannot be accounted, and 1 is the lowest that can be reduced from town.
01838    * So no need to go any further*/
01839   if (as->noise_level < 2) return as->noise_level;
01840 
01841   uint distance = GetMinimalAirportDistanceToTile(as, town_tile, tile);
01842 
01843   /* The steps for measuring noise reduction are based on the "magical" (and arbitrary) 8 base distance
01844    * adding the town_council_tolerance 4 times, as a way to graduate, depending of the tolerance.
01845    * Basically, it says that the less tolerant a town is, the bigger the distance before
01846    * an actual decrease can be granted */
01847   uint8 town_tolerance_distance = 8 + (_settings_game.difficulty.town_council_tolerance * 4);
01848 
01849   /* now, we want to have the distance segmented using the distance judged bareable by town
01850    * This will give us the coefficient of reduction the distance provides. */
01851   uint noise_reduction = distance / town_tolerance_distance;
01852 
01853   /* If the noise reduction equals the airport noise itself, don't give it for free.
01854    * Otherwise, simply reduce the airport's level. */
01855   return noise_reduction >= as->noise_level ? 1 : as->noise_level - noise_reduction;
01856 }
01857 
01865 Town *AirportGetNearestTown(const AirportSpec *as, TileIndex airport_tile)
01866 {
01867   Town *t, *nearest = NULL;
01868   uint add = as->size_x + as->size_y - 2; // GetMinimalAirportDistanceToTile can differ from DistanceManhattan by this much
01869   uint mindist = UINT_MAX - add; // prevent overflow
01870   FOR_ALL_TOWNS(t) {
01871     if (DistanceManhattan(t->xy, airport_tile) < mindist + add) { // avoid calling GetMinimalAirportDistanceToTile too often
01872       uint dist = GetMinimalAirportDistanceToTile(as, t->xy, airport_tile);
01873       if (dist < mindist) {
01874         nearest = t;
01875         mindist = dist;
01876       }
01877     }
01878   }
01879 
01880   return nearest;
01881 }
01882 
01883 
01885 void UpdateAirportsNoise()
01886 {
01887   Town *t;
01888   const Station *st;
01889 
01890   FOR_ALL_TOWNS(t) t->noise_reached = 0;
01891 
01892   FOR_ALL_STATIONS(st) {
01893     if (st->airport_tile != INVALID_TILE) {
01894       const AirportSpec *as = st->GetAirportSpec();
01895       Town *nearest = AirportGetNearestTown(as, st->airport_tile);
01896       nearest->noise_reached += GetAirportNoiseLevelForTown(as, nearest->xy, st->airport_tile);
01897     }
01898   }
01899 }
01900 
01911 CommandCost CmdBuildAirport(TileIndex tile, DoCommandFlag flags, uint32 p1, uint32 p2, const char *text)
01912 {
01913   bool airport_upgrade = true;
01914   StationID station_to_join = GB(p2, 16, 16);
01915   bool reuse = (station_to_join != NEW_STATION);
01916   if (!reuse) station_to_join = INVALID_STATION;
01917   bool distant_join = (station_to_join != INVALID_STATION);
01918 
01919   if (distant_join && (!_settings_game.station.distant_join_stations || !Station::IsValidID(station_to_join))) return CMD_ERROR;
01920 
01921   if (p1 >= NUM_AIRPORTS) return CMD_ERROR;
01922 
01923   if (!CheckIfAuthorityAllowsNewStation(tile, flags)) {
01924     return CMD_ERROR;
01925   }
01926 
01927   /* Check if a valid, buildable airport was chosen for construction */
01928   const AirportSpec *as = AirportSpec::Get(p1);
01929   if (!as->IsAvailable()) return CMD_ERROR;
01930 
01931   Town *t = ClosestTownFromTile(tile, UINT_MAX);
01932   int w = as->size_x;
01933   int h = as->size_y;
01934 
01935   if (w > _settings_game.station.station_spread || h > _settings_game.station.station_spread) {
01936     _error_message = STR_ERROR_STATION_TOO_SPREAD_OUT;
01937     return CMD_ERROR;
01938   }
01939 
01940   CommandCost cost = CheckFlatLandBelow(tile, w, h, flags, 0, NULL);
01941   if (cost.Failed()) return cost;
01942 
01943   /* Go get the final noise level, that is base noise minus factor from distance to town center */
01944   Town *nearest = AirportGetNearestTown(as, tile);
01945   uint newnoise_level = GetAirportNoiseLevelForTown(as, nearest->xy, tile);
01946 
01947   /* Check if local auth would allow a new airport */
01948   StringID authority_refuse_message = STR_NULL;
01949 
01950   if (_settings_game.economy.station_noise_level) {
01951     /* do not allow to build a new airport if this raise the town noise over the maximum allowed by town */
01952     if ((nearest->noise_reached + newnoise_level) > nearest->MaxTownNoise()) {
01953       authority_refuse_message = STR_ERROR_LOCAL_AUTHORITY_REFUSES_NOISE;
01954     }
01955   } else {
01956     uint num = 0;
01957     const Station *st;
01958     FOR_ALL_STATIONS(st) {
01959       if (st->town == t && (st->facilities & FACIL_AIRPORT) && st->airport_type != AT_OILRIG) num++;
01960     }
01961     if (num >= 2) {
01962       authority_refuse_message = STR_ERROR_LOCAL_AUTHORITY_REFUSES_AIRPORT;
01963     }
01964   }
01965 
01966   if (authority_refuse_message != STR_NULL) {
01967     SetDParam(0, t->index);
01968     return_cmd_error(authority_refuse_message);
01969   }
01970 
01971   Station *st = NULL;
01972   CommandCost ret = FindJoiningStation(INVALID_STATION, station_to_join, HasBit(p2, 0), TileArea(tile, w, h), &st);
01973   if (ret.Failed()) return ret;
01974 
01975   /* Distant join */
01976   if (st == NULL && distant_join) st = Station::GetIfValid(station_to_join);
01977 
01978   /* Find a deleted station close to us */
01979   if (st == NULL && reuse) st = GetClosestDeletedStation(tile);
01980 
01981   if (st != NULL) {
01982     if (st->owner != _current_company) {
01983       return_cmd_error(STR_ERROR_TOO_CLOSE_TO_ANOTHER_STATION);
01984     }
01985 
01986     if (!st->rect.BeforeAddRect(tile, w, h, StationRect::ADD_TEST)) return CMD_ERROR;
01987 
01988     if (st->airport_tile != INVALID_TILE) {
01989       return_cmd_error(STR_ERROR_TOO_CLOSE_TO_ANOTHER_AIRPORT);
01990     }
01991   } else {
01992     airport_upgrade = false;
01993 
01994     /* allocate and initialize new station */
01995     if (!Station::CanAllocateItem()) return_cmd_error(STR_ERROR_TOO_MANY_STATIONS_LOADING);
01996 
01997     if (flags & DC_EXEC) {
01998       st = new Station(tile);
01999 
02000       st->town = t;
02001       st->string_id = GenerateStationName(st, tile, !(GetAirport(p1)->flags & AirportFTAClass::AIRPLANES) ? STATIONNAMING_HELIPORT : STATIONNAMING_AIRPORT);
02002 
02003       if (Company::IsValidID(_current_company)) {
02004         SetBit(st->town->have_ratings, _current_company);
02005       }
02006     }
02007   }
02008 
02009   cost.AddCost(_price[PR_BUILD_STATION_AIRPORT] * w * h);
02010 
02011   if (flags & DC_EXEC) {
02012     /* Always add the noise, so there will be no need to recalculate when option toggles */
02013     nearest->noise_reached += newnoise_level;
02014 
02015     st->airport_tile = tile;
02016     st->AddFacility(FACIL_AIRPORT, tile);
02017     st->airport_type = (byte)p1;
02018     st->airport_flags = 0;
02019 
02020     st->rect.BeforeAddRect(tile, w, h, StationRect::ADD_TRY);
02021 
02022     /* if airport was demolished while planes were en-route to it, the
02023      * positions can no longer be the same (v->u.air.pos), since different
02024      * airports have different indexes. So update all planes en-route to this
02025      * airport. Only update if
02026      * 1. airport is upgraded
02027      * 2. airport is added to existing station (unfortunately unavoideable)
02028      */
02029     if (airport_upgrade) UpdateAirplanesOnNewStation(st);
02030 
02031     const AirportTileTable *it = as->table[0];
02032     do {
02033       TileIndex cur_tile = tile + ToTileIndexDiff(it->ti);
02034       MakeAirport(cur_tile, st->owner, st->index, it->gfx);
02035     } while ((++it)->ti.x != -0x80);
02036 
02037     st->UpdateVirtCoord();
02038     UpdateStationAcceptance(st, false);
02039     st->RecomputeIndustriesNear();
02040     InvalidateWindowData(WC_SELECT_STATION, 0, 0);
02041     InvalidateWindowData(WC_STATION_LIST, st->owner, 0);
02042     SetWindowWidgetDirty(WC_STATION_VIEW, st->index, SVW_PLANES);
02043 
02044     if (_settings_game.economy.station_noise_level) {
02045       SetWindowDirty(WC_TOWN_VIEW, st->town->index);
02046     }
02047   }
02048 
02049   return cost;
02050 }
02051 
02058 static CommandCost RemoveAirport(TileIndex tile, DoCommandFlag flags)
02059 {
02060   Station *st = Station::GetByTile(tile);
02061 
02062   if (_current_company != OWNER_WATER && !CheckOwnership(st->owner)) {
02063     return CMD_ERROR;
02064   }
02065 
02066   tile = st->airport_tile;
02067 
02068   const AirportSpec *as = st->GetAirportSpec();
02069   int w = as->size_x;
02070   int h = as->size_y;
02071 
02072   CommandCost cost(EXPENSES_CONSTRUCTION);
02073 
02074   const Aircraft *a;
02075   FOR_ALL_AIRCRAFT(a) {
02076     if (!a->IsNormalAircraft()) continue;
02077     if (a->targetairport == st->index && a->state != FLYING) return CMD_ERROR;
02078   }
02079 
02080   TILE_LOOP(tile_cur, w, h, tile) {
02081     if (!EnsureNoVehicleOnGround(tile_cur)) return CMD_ERROR;
02082 
02083     if (!st->TileBelongsToAirport(tile_cur)) continue;
02084 
02085     cost.AddCost(_price[PR_CLEAR_STATION_AIRPORT]);
02086 
02087     if (flags & DC_EXEC) {
02088       DeleteAnimatedTile(tile_cur);
02089       DoClearSquare(tile_cur);
02090     }
02091   }
02092 
02093   if (flags & DC_EXEC) {
02094     for (uint i = 0; i < as->nof_depots; ++i) {
02095       DeleteWindowById(
02096         WC_VEHICLE_DEPOT, st->GetHangarTile(i)
02097       );
02098     }
02099 
02100     /* Go get the final noise level, that is base noise minus factor from distance to town center.
02101      * And as for construction, always remove it, even if the setting is not set, in order to avoid the
02102      * need of recalculation */
02103     Town *nearest = AirportGetNearestTown(as, tile);
02104     nearest->noise_reached -= GetAirportNoiseLevelForTown(as, nearest->xy, tile);
02105 
02106     st->rect.AfterRemoveRect(st, tile, w, h);
02107 
02108     st->airport_tile = INVALID_TILE;
02109     st->facilities &= ~FACIL_AIRPORT;
02110 
02111     SetWindowWidgetDirty(WC_STATION_VIEW, st->index, SVW_PLANES);
02112 
02113     if (_settings_game.economy.station_noise_level) {
02114       SetWindowDirty(WC_TOWN_VIEW, st->town->index);
02115     }
02116 
02117     st->UpdateVirtCoord();
02118     st->RecomputeIndustriesNear();
02119     DeleteStationIfEmpty(st);
02120   }
02121 
02122   return cost;
02123 }
02124 
02131 bool HasStationInUse(StationID station, CompanyID company)
02132 {
02133   const Vehicle *v;
02134   FOR_ALL_VEHICLES(v) {
02135     if (company == INVALID_COMPANY || v->owner == company) {
02136       const Order *order;
02137       FOR_VEHICLE_ORDERS(v, order) {
02138         if ((order->IsType(OT_GOTO_STATION) || order->IsType(OT_GOTO_WAYPOINT)) && order->GetDestination() == station) {
02139           return true;
02140         }
02141       }
02142     }
02143   }
02144   return false;
02145 }
02146 
02147 static const TileIndexDiffC _dock_tileoffs_chkaround[] = {
02148   {-1,  0},
02149   { 0,  0},
02150   { 0,  0},
02151   { 0, -1}
02152 };
02153 static const byte _dock_w_chk[4] = { 2, 1, 2, 1 };
02154 static const byte _dock_h_chk[4] = { 1, 2, 1, 2 };
02155 
02164 CommandCost CmdBuildDock(TileIndex tile, DoCommandFlag flags, uint32 p1, uint32 p2, const char *text)
02165 {
02166   StationID station_to_join = GB(p2, 16, 16);
02167   bool reuse = (station_to_join != NEW_STATION);
02168   if (!reuse) station_to_join = INVALID_STATION;
02169   bool distant_join = (station_to_join != INVALID_STATION);
02170 
02171   if (distant_join && (!_settings_game.station.distant_join_stations || !Station::IsValidID(station_to_join))) return CMD_ERROR;
02172 
02173   DiagDirection direction = GetInclinedSlopeDirection(GetTileSlope(tile, NULL));
02174   if (direction == INVALID_DIAGDIR) return_cmd_error(STR_ERROR_SITE_UNSUITABLE);
02175   direction = ReverseDiagDir(direction);
02176 
02177   /* Docks cannot be placed on rapids */
02178   if (IsWaterTile(tile)) return_cmd_error(STR_ERROR_SITE_UNSUITABLE);
02179 
02180   if (!CheckIfAuthorityAllowsNewStation(tile, flags)) return CMD_ERROR;
02181 
02182   if (MayHaveBridgeAbove(tile) && IsBridgeAbove(tile)) return_cmd_error(STR_ERROR_MUST_DEMOLISH_BRIDGE_FIRST);
02183 
02184   if (DoCommand(tile, 0, 0, flags, CMD_LANDSCAPE_CLEAR).Failed()) return CMD_ERROR;
02185 
02186   TileIndex tile_cur = tile + TileOffsByDiagDir(direction);
02187 
02188   if (!IsTileType(tile_cur, MP_WATER) || GetTileSlope(tile_cur, NULL) != SLOPE_FLAT) {
02189     return_cmd_error(STR_ERROR_SITE_UNSUITABLE);
02190   }
02191 
02192   if (MayHaveBridgeAbove(tile_cur) && IsBridgeAbove(tile_cur)) return_cmd_error(STR_ERROR_MUST_DEMOLISH_BRIDGE_FIRST);
02193 
02194   /* Get the water class of the water tile before it is cleared.*/
02195   WaterClass wc = GetWaterClass(tile_cur);
02196 
02197   if (DoCommand(tile_cur, 0, 0, flags, CMD_LANDSCAPE_CLEAR).Failed()) return CMD_ERROR;
02198 
02199   tile_cur += TileOffsByDiagDir(direction);
02200   if (!IsTileType(tile_cur, MP_WATER) || GetTileSlope(tile_cur, NULL) != SLOPE_FLAT) {
02201     return_cmd_error(STR_ERROR_SITE_UNSUITABLE);
02202   }
02203 
02204   /* middle */
02205   Station *st = NULL;
02206   CommandCost ret = FindJoiningStation(INVALID_STATION, station_to_join, HasBit(p1, 0),
02207       TileArea(tile + ToTileIndexDiff(_dock_tileoffs_chkaround[direction]),
02208           _dock_w_chk[direction], _dock_h_chk[direction]), &st);
02209   if (ret.Failed()) return ret;
02210 
02211   /* Distant join */
02212   if (st == NULL && distant_join) st = Station::GetIfValid(station_to_join);
02213 
02214   /* Find a deleted station close to us */
02215   if (st == NULL && reuse) st = GetClosestDeletedStation(tile);
02216 
02217   if (st != NULL) {
02218     if (st->owner != _current_company) {
02219       return_cmd_error(STR_ERROR_TOO_CLOSE_TO_ANOTHER_STATION);
02220     }
02221 
02222     if (!st->rect.BeforeAddRect(
02223         tile + ToTileIndexDiff(_dock_tileoffs_chkaround[direction]),
02224         _dock_w_chk[direction], _dock_h_chk[direction], StationRect::ADD_TEST)) return CMD_ERROR;
02225 
02226     if (st->dock_tile != INVALID_TILE) return_cmd_error(STR_ERROR_TOO_CLOSE_TO_ANOTHER_DOCK);
02227   } else {
02228     /* allocate and initialize new station */
02229     if (!Station::CanAllocateItem()) return_cmd_error(STR_ERROR_TOO_MANY_STATIONS_LOADING);
02230 
02231     if (flags & DC_EXEC) {
02232       st = new Station(tile);
02233 
02234       st->town = ClosestTownFromTile(tile, UINT_MAX);
02235       st->string_id = GenerateStationName(st, tile, STATIONNAMING_DOCK);
02236 
02237       if (Company::IsValidID(_current_company)) {
02238         SetBit(st->town->have_ratings, _current_company);
02239       }
02240     }
02241   }
02242 
02243   if (flags & DC_EXEC) {
02244     st->dock_tile = tile;
02245     st->AddFacility(FACIL_DOCK, tile);
02246 
02247     st->rect.BeforeAddRect(
02248         tile + ToTileIndexDiff(_dock_tileoffs_chkaround[direction]),
02249         _dock_w_chk[direction], _dock_h_chk[direction], StationRect::ADD_TRY);
02250 
02251     MakeDock(tile, st->owner, st->index, direction, wc);
02252 
02253     st->UpdateVirtCoord();
02254     UpdateStationAcceptance(st, false);
02255     st->RecomputeIndustriesNear();
02256     InvalidateWindowData(WC_SELECT_STATION, 0, 0);
02257     InvalidateWindowData(WC_STATION_LIST, st->owner, 0);
02258     SetWindowWidgetDirty(WC_STATION_VIEW, st->index, SVW_SHIPS);
02259   }
02260 
02261   return CommandCost(EXPENSES_CONSTRUCTION, _price[PR_BUILD_STATION_DOCK]);
02262 }
02263 
02270 static CommandCost RemoveDock(TileIndex tile, DoCommandFlag flags)
02271 {
02272   Station *st = Station::GetByTile(tile);
02273   if (!CheckOwnership(st->owner)) return CMD_ERROR;
02274 
02275   TileIndex tile1 = st->dock_tile;
02276   TileIndex tile2 = tile1 + TileOffsByDiagDir(GetDockDirection(tile1));
02277 
02278   if (!EnsureNoVehicleOnGround(tile1)) return CMD_ERROR;
02279   if (!EnsureNoVehicleOnGround(tile2)) return CMD_ERROR;
02280 
02281   if (flags & DC_EXEC) {
02282     DoClearSquare(tile1);
02283     MakeWaterKeepingClass(tile2, st->owner);
02284 
02285     st->rect.AfterRemoveTile(st, tile1);
02286     st->rect.AfterRemoveTile(st, tile2);
02287 
02288     MarkTileDirtyByTile(tile2);
02289 
02290     st->dock_tile = INVALID_TILE;
02291     st->facilities &= ~FACIL_DOCK;
02292 
02293     SetWindowWidgetDirty(WC_STATION_VIEW, st->index, SVW_SHIPS);
02294     st->UpdateVirtCoord();
02295     st->RecomputeIndustriesNear();
02296     DeleteStationIfEmpty(st);
02297   }
02298 
02299   return CommandCost(EXPENSES_CONSTRUCTION, _price[PR_CLEAR_STATION_DOCK]);
02300 }
02301 
02302 #include "table/station_land.h"
02303 
02304 const DrawTileSprites *GetStationTileLayout(StationType st, byte gfx)
02305 {
02306   return &_station_display_datas[st][gfx];
02307 }
02308 
02309 static void DrawTile_Station(TileInfo *ti)
02310 {
02311   const DrawTileSprites *t = NULL;
02312   RoadTypes roadtypes;
02313   int32 total_offset;
02314   int32 custom_ground_offset;
02315   const RailtypeInfo *rti = NULL;
02316   uint32 relocation = 0;
02317   const BaseStation *st = NULL;
02318   const StationSpec *statspec = NULL;
02319 
02320   if (HasStationRail(ti->tile)) {
02321     rti = GetRailTypeInfo(GetRailType(ti->tile));
02322     roadtypes = ROADTYPES_NONE;
02323     total_offset = rti->total_offset;
02324     custom_ground_offset = rti->custom_ground_offset;
02325 
02326     if (IsCustomStationSpecIndex(ti->tile)) {
02327       /* look for customization */
02328       st = BaseStation::GetByTile(ti->tile);
02329       statspec = st->speclist[GetCustomStationSpecIndex(ti->tile)].spec;
02330 
02331       if (statspec != NULL) {
02332         uint tile = GetStationGfx(ti->tile);
02333 
02334         relocation = GetCustomStationRelocation(statspec, st, ti->tile);
02335 
02336         if (HasBit(statspec->callback_mask, CBM_STATION_SPRITE_LAYOUT)) {
02337           uint16 callback = GetStationCallback(CBID_STATION_SPRITE_LAYOUT, 0, 0, statspec, st, ti->tile);
02338           if (callback != CALLBACK_FAILED) tile = (callback & ~1) + GetRailStationAxis(ti->tile);
02339         }
02340 
02341         /* Ensure the chosen tile layout is valid for this custom station */
02342         if (statspec->renderdata != NULL) {
02343           t = &statspec->renderdata[tile < statspec->tiles ? tile : (uint)GetRailStationAxis(ti->tile)];
02344         }
02345       }
02346     }
02347   } else {
02348     roadtypes = IsRoadStop(ti->tile) ? GetRoadTypes(ti->tile) : ROADTYPES_NONE;
02349     total_offset = 0;
02350     custom_ground_offset = 0;
02351   }
02352 
02353   if (IsAirport(ti->tile)) {
02354     switch (GetStationGfx(ti->tile)) {
02355       case APT_RADAR_GRASS_FENCE_SW:
02356         t = &_station_display_datas_airport_radar_grass_fence_sw[GetStationAnimationFrame(ti->tile)];
02357         break;
02358       case APT_GRASS_FENCE_NE_FLAG:
02359         t = &_station_display_datas_airport_flag_grass_fence_ne[GetStationAnimationFrame(ti->tile)];
02360         break;
02361       case APT_RADAR_FENCE_SW:
02362         t = &_station_display_datas_airport_radar_fence_sw[GetStationAnimationFrame(ti->tile)];
02363         break;
02364       case APT_RADAR_FENCE_NE:
02365         t = &_station_display_datas_airport_radar_fence_ne[GetStationAnimationFrame(ti->tile)];
02366         break;
02367       case APT_GRASS_FENCE_NE_FLAG_2:
02368         t = &_station_display_datas_airport_flag_grass_fence_ne_2[GetStationAnimationFrame(ti->tile)];
02369         break;
02370     }
02371   }
02372 
02373   Owner owner = GetTileOwner(ti->tile);
02374 
02375   PaletteID palette;
02376   if (Company::IsValidID(owner)) {
02377     palette = COMPANY_SPRITE_COLOUR(owner);
02378   } else {
02379     /* Some stations are not owner by a company, namely oil rigs */
02380     palette = PALETTE_TO_GREY;
02381   }
02382 
02383   if (t == NULL || t->seq == NULL) t = GetStationTileLayout(GetStationType(ti->tile), GetStationGfx(ti->tile));
02384 
02385   /* don't show foundation for docks */
02386   if (ti->tileh != SLOPE_FLAT && !IsDock(ti->tile)) {
02387     if (statspec != NULL && HasBit(statspec->flags, SSF_CUSTOM_FOUNDATIONS)) {
02388       /* Station has custom foundations. */
02389       SpriteID image = GetCustomStationFoundationRelocation(statspec, st, ti->tile);
02390 
02391       if (HasBit(statspec->flags, SSF_EXTENDED_FOUNDATIONS)) {
02392         /* Station provides extended foundations. */
02393 
02394         static const uint8 foundation_parts[] = {
02395           0, 0, 0, 0, // Invalid,  Invalid,   Invalid,   SLOPE_SW
02396           0, 1, 2, 3, // Invalid,  SLOPE_EW,  SLOPE_SE,  SLOPE_WSE
02397           0, 4, 5, 6, // Invalid,  SLOPE_NW,  SLOPE_NS,  SLOPE_NWS
02398           7, 8, 9     // SLOPE_NE, SLOPE_ENW, SLOPE_SEN
02399         };
02400 
02401         AddSortableSpriteToDraw(image + foundation_parts[ti->tileh], PAL_NONE, ti->x, ti->y, 16, 16, 7, ti->z);
02402       } else {
02403         /* Draw simple foundations, built up from 8 possible foundation sprites. */
02404 
02405         /* Each set bit represents one of the eight composite sprites to be drawn.
02406          * 'Invalid' entries will not drawn but are included for completeness. */
02407         static const uint8 composite_foundation_parts[] = {
02408           /* Invalid  (00000000), Invalid   (11010001), Invalid   (11100100), SLOPE_SW  (11100000) */
02409              0x00,                0xD1,                 0xE4,                 0xE0,
02410           /* Invalid  (11001010), SLOPE_EW  (11001001), SLOPE_SE  (11000100), SLOPE_WSE (11000000) */
02411              0xCA,                0xC9,                 0xC4,                 0xC0,
02412           /* Invalid  (11010010), SLOPE_NW  (10010001), SLOPE_NS  (11100100), SLOPE_NWS (10100000) */
02413              0xD2,                0x91,                 0xE4,                 0xA0,
02414           /* SLOPE_NE (01001010), SLOPE_ENW (00001001), SLOPE_SEN (01000100) */
02415              0x4A,                0x09,                 0x44
02416         };
02417 
02418         uint8 parts = composite_foundation_parts[ti->tileh];
02419 
02420         /* If foundations continue beyond the tile's upper sides then
02421          * mask out the last two pieces. */
02422         uint z;
02423         Slope slope = GetFoundationSlope(ti->tile, &z);
02424         if (!HasFoundationNW(ti->tile, slope, z)) ClrBit(parts, 6);
02425         if (!HasFoundationNE(ti->tile, slope, z)) ClrBit(parts, 7);
02426 
02427         StartSpriteCombine();
02428         for (int i = 0; i < 8; i++) {
02429           if (HasBit(parts, i)) {
02430             AddSortableSpriteToDraw(image + i, PAL_NONE, ti->x, ti->y, 16, 16, 7, ti->z);
02431           }
02432         }
02433         EndSpriteCombine();
02434       }
02435 
02436       OffsetGroundSprite(31, 1);
02437       ti->z += ApplyFoundationToSlope(FOUNDATION_LEVELED, &ti->tileh);
02438     } else {
02439       DrawFoundation(ti, FOUNDATION_LEVELED);
02440     }
02441   }
02442 
02443   if (IsBuoy(ti->tile) || IsDock(ti->tile) || (IsOilRig(ti->tile) && GetWaterClass(ti->tile) != WATER_CLASS_INVALID)) {
02444     if (ti->tileh == SLOPE_FLAT) {
02445       DrawWaterClassGround(ti);
02446     } else {
02447       assert(IsDock(ti->tile));
02448       TileIndex water_tile = ti->tile + TileOffsByDiagDir(GetDockDirection(ti->tile));
02449       WaterClass wc = GetWaterClass(water_tile);
02450       if (wc == WATER_CLASS_SEA) {
02451         DrawShoreTile(ti->tileh);
02452       } else {
02453         DrawClearLandTile(ti, 3);
02454       }
02455     }
02456   } else {
02457     SpriteID image = t->ground.sprite;
02458     PaletteID pal  = t->ground.pal;
02459     if (rti != NULL && rti->UsesOverlay() && (image == SPR_RAIL_TRACK_X || image == SPR_RAIL_TRACK_Y)) {
02460       SpriteID ground = GetCustomRailSprite(rti, ti->tile, RTSG_GROUND);
02461       DrawGroundSprite(SPR_FLAT_GRASS_TILE, PAL_NONE);
02462       DrawGroundSprite(ground + (image == SPR_RAIL_TRACK_X ? RTO_X : RTO_Y), PAL_NONE);
02463 
02464       if (_game_mode != GM_MENU && _settings_client.gui.show_track_reservation && HasStationReservation(ti->tile)) {
02465         SpriteID overlay = GetCustomRailSprite(rti, ti->tile, RTSG_OVERLAY);
02466         DrawGroundSprite(overlay + (image == SPR_RAIL_TRACK_X ? RTO_X : RTO_Y), PALETTE_CRASH);
02467       }
02468     } else {
02469       if (HasBit(image, SPRITE_MODIFIER_CUSTOM_SPRITE)) {
02470         image += GetCustomStationGroundRelocation(statspec, st, ti->tile);
02471         image += custom_ground_offset;
02472       } else {
02473         image += total_offset;
02474       }
02475       DrawGroundSprite(image, GroundSpritePaletteTransform(image, pal, palette));
02476 
02477       /* PBS debugging, draw reserved tracks darker */
02478       if (_game_mode != GM_MENU && _settings_client.gui.show_track_reservation && HasStationRail(ti->tile) && HasStationReservation(ti->tile)) {
02479         const RailtypeInfo *rti = GetRailTypeInfo(GetRailType(ti->tile));
02480         DrawGroundSprite(GetRailStationAxis(ti->tile) == AXIS_X ? rti->base_sprites.single_x : rti->base_sprites.single_y, PALETTE_CRASH);
02481       }
02482     }
02483   }
02484 
02485   if (HasStationRail(ti->tile) && HasCatenaryDrawn(GetRailType(ti->tile)) && IsStationTileElectrifiable(ti->tile)) DrawCatenary(ti);
02486 
02487   if (HasBit(roadtypes, ROADTYPE_TRAM)) {
02488     Axis axis = GetRoadStopDir(ti->tile) == DIAGDIR_NE ? AXIS_X : AXIS_Y;
02489     DrawGroundSprite((HasBit(roadtypes, ROADTYPE_ROAD) ? SPR_TRAMWAY_OVERLAY : SPR_TRAMWAY_TRAM) + (axis ^ 1), PAL_NONE);
02490     DrawTramCatenary(ti, axis == AXIS_X ? ROAD_X : ROAD_Y);
02491   }
02492 
02493   if (IsRailWaypoint(ti->tile)) {
02494     /* Don't offset the waypoint graphics; they're always the same. */
02495     total_offset = 0;
02496   }
02497 
02498   DrawRailTileSeq(ti, t, TO_BUILDINGS, total_offset, relocation, palette);
02499 }
02500 
02501 void StationPickerDrawSprite(int x, int y, StationType st, RailType railtype, RoadType roadtype, int image)
02502 {
02503   int32 total_offset = 0;
02504   PaletteID pal = COMPANY_SPRITE_COLOUR(_local_company);
02505   const DrawTileSprites *t = GetStationTileLayout(st, image);
02506   const RailtypeInfo *rti = NULL;
02507 
02508   if (railtype != INVALID_RAILTYPE) {
02509     rti = GetRailTypeInfo(railtype);
02510     total_offset = rti->total_offset;
02511   }
02512 
02513   SpriteID img = t->ground.sprite;
02514   if ((img == SPR_RAIL_TRACK_X || img == SPR_RAIL_TRACK_Y) && rti->UsesOverlay()) {
02515     SpriteID ground = GetCustomRailSprite(rti, INVALID_TILE, RTSG_GROUND);
02516     DrawSprite(SPR_FLAT_GRASS_TILE, PAL_NONE, x, y);
02517     DrawSprite(ground + (img == SPR_RAIL_TRACK_X ? RTO_X : RTO_Y), PAL_NONE, x, y);
02518   } else {
02519     DrawSprite(img + total_offset, HasBit(img, PALETTE_MODIFIER_COLOUR) ? pal : PAL_NONE, x, y);
02520   }
02521 
02522   if (roadtype == ROADTYPE_TRAM) {
02523     DrawSprite(SPR_TRAMWAY_TRAM + (t->ground.sprite == SPR_ROAD_PAVED_STRAIGHT_X ? 1 : 0), PAL_NONE, x, y);
02524   }
02525 
02526   /* Default waypoint has no railtype specific sprites */
02527   DrawRailTileSeqInGUI(x, y, t, st == STATION_WAYPOINT ? 0 : total_offset, 0, pal);
02528 }
02529 
02530 static uint GetSlopeZ_Station(TileIndex tile, uint x, uint y)
02531 {
02532   return GetTileMaxZ(tile);
02533 }
02534 
02535 static Foundation GetFoundation_Station(TileIndex tile, Slope tileh)
02536 {
02537   return FlatteningFoundation(tileh);
02538 }
02539 
02540 static void GetTileDesc_Station(TileIndex tile, TileDesc *td)
02541 {
02542   td->owner[0] = GetTileOwner(tile);
02543   if (IsDriveThroughStopTile(tile)) {
02544     Owner road_owner = INVALID_OWNER;
02545     Owner tram_owner = INVALID_OWNER;
02546     RoadTypes rts = GetRoadTypes(tile);
02547     if (HasBit(rts, ROADTYPE_ROAD)) road_owner = GetRoadOwner(tile, ROADTYPE_ROAD);
02548     if (HasBit(rts, ROADTYPE_TRAM)) tram_owner = GetRoadOwner(tile, ROADTYPE_TRAM);
02549 
02550     /* Is there a mix of owners? */
02551     if ((tram_owner != INVALID_OWNER && tram_owner != td->owner[0]) ||
02552         (road_owner != INVALID_OWNER && road_owner != td->owner[0])) {
02553       uint i = 1;
02554       if (road_owner != INVALID_OWNER) {
02555         td->owner_type[i] = STR_LAND_AREA_INFORMATION_ROAD_OWNER;
02556         td->owner[i] = road_owner;
02557         i++;
02558       }
02559       if (tram_owner != INVALID_OWNER) {
02560         td->owner_type[i] = STR_LAND_AREA_INFORMATION_TRAM_OWNER;
02561         td->owner[i] = tram_owner;
02562       }
02563     }
02564   }
02565   td->build_date = BaseStation::GetByTile(tile)->build_date;
02566 
02567   if (HasStationTileRail(tile)) {
02568     const StationSpec *spec = GetStationSpec(tile);
02569 
02570     if (spec != NULL) {
02571       td->station_class = GetStationClassName(spec->sclass);
02572       td->station_name  = spec->name;
02573 
02574       if (spec->grffile != NULL) {
02575         const GRFConfig *gc = GetGRFConfig(spec->grffile->grfid);
02576         td->grf = gc->name;
02577       }
02578     }
02579 
02580     const RailtypeInfo *rti = GetRailTypeInfo(GetRailType(tile));
02581     td->rail_speed = rti->max_speed;
02582   }
02583 
02584   StringID str;
02585   switch (GetStationType(tile)) {
02586     default: NOT_REACHED();
02587     case STATION_RAIL:     str = STR_LAI_STATION_DESCRIPTION_RAILROAD_STATION; break;
02588     case STATION_AIRPORT:
02589       str = (IsHangar(tile) ? STR_LAI_STATION_DESCRIPTION_AIRCRAFT_HANGAR : STR_LAI_STATION_DESCRIPTION_AIRPORT);
02590       break;
02591     case STATION_TRUCK:    str = STR_LAI_STATION_DESCRIPTION_TRUCK_LOADING_AREA; break;
02592     case STATION_BUS:      str = STR_LAI_STATION_DESCRIPTION_BUS_STATION; break;
02593     case STATION_OILRIG:   str = STR_INDUSTRY_NAME_OIL_RIG; break;
02594     case STATION_DOCK:     str = STR_LAI_STATION_DESCRIPTION_SHIP_DOCK; break;
02595     case STATION_BUOY:     str = STR_LAI_STATION_DESCRIPTION_BUOY; break;
02596     case STATION_WAYPOINT: str = STR_LAI_STATION_DESCRIPTION_WAYPOINT; break;
02597   }
02598   td->str = str;
02599 }
02600 
02601 
02602 static TrackStatus GetTileTrackStatus_Station(TileIndex tile, TransportType mode, uint sub_mode, DiagDirection side)
02603 {
02604   TrackBits trackbits = TRACK_BIT_NONE;
02605 
02606   switch (mode) {
02607     case TRANSPORT_RAIL:
02608       if (HasStationRail(tile) && !IsStationTileBlocked(tile)) {
02609         trackbits = TrackToTrackBits(GetRailStationTrack(tile));
02610       }
02611       break;
02612 
02613     case TRANSPORT_WATER:
02614       /* buoy is coded as a station, it is always on open water */
02615       if (IsBuoy(tile)) {
02616         trackbits = TRACK_BIT_ALL;
02617         /* remove tracks that connect NE map edge */
02618         if (TileX(tile) == 0) trackbits &= ~(TRACK_BIT_X | TRACK_BIT_UPPER | TRACK_BIT_RIGHT);
02619         /* remove tracks that connect NW map edge */
02620         if (TileY(tile) == 0) trackbits &= ~(TRACK_BIT_Y | TRACK_BIT_LEFT | TRACK_BIT_UPPER);
02621       }
02622       break;
02623 
02624     case TRANSPORT_ROAD:
02625       if ((GetRoadTypes(tile) & sub_mode) != 0 && IsRoadStop(tile)) {
02626         DiagDirection dir = GetRoadStopDir(tile);
02627         Axis axis = DiagDirToAxis(dir);
02628 
02629         if (side != INVALID_DIAGDIR) {
02630           if (axis != DiagDirToAxis(side) || (IsStandardRoadStopTile(tile) && dir != side)) break;
02631         }
02632 
02633         trackbits = AxisToTrackBits(axis);
02634       }
02635       break;
02636 
02637     default:
02638       break;
02639   }
02640 
02641   return CombineTrackStatus(TrackBitsToTrackdirBits(trackbits), TRACKDIR_BIT_NONE);
02642 }
02643 
02644 
02645 static void TileLoop_Station(TileIndex tile)
02646 {
02647   /* FIXME -- GetTileTrackStatus_Station -> animated stationtiles
02648    * hardcoded.....not good */
02649   switch (GetStationType(tile)) {
02650     case STATION_AIRPORT:
02651       if (AirportTileSpec::Get(GetStationGfx(tile))->animation_info != 0xFFFF) {
02652         AddAnimatedTile(tile);
02653       }
02654       break;
02655 
02656     case STATION_DOCK:
02657       if (GetTileSlope(tile, NULL) != SLOPE_FLAT) break; // only handle water part
02658     /* FALL THROUGH */
02659     case STATION_OILRIG: //(station part)
02660     case STATION_BUOY:
02661       TileLoop_Water(tile);
02662       break;
02663 
02664     default: break;
02665   }
02666 }
02667 
02668 
02669 static void AnimateTile_Station(TileIndex tile)
02670 {
02671   if (HasStationRail(tile)) {
02672     AnimateStationTile(tile);
02673     return;
02674   }
02675 
02676   if (IsAirport(tile)) {
02677     const AirportTileSpec *ats = AirportTileSpec::Get(GetStationGfx(tile));
02678     uint16 mask = (1 << ats->animation_speed) - 1;
02679     if (ats->animation_info != 0xFFFF && (_tick_counter & mask) == 0) {
02680       uint8 next_frame = GetStationAnimationFrame(tile) + 1;
02681       if (next_frame >= GB(ats->animation_info, 0, 8)) next_frame = 0;
02682       SetStationAnimationFrame(tile, next_frame);
02683       MarkTileDirtyByTile(tile);
02684     }
02685   }
02686 }
02687 
02688 
02689 static bool ClickTile_Station(TileIndex tile)
02690 {
02691   const BaseStation *st = BaseStation::GetByTile(tile);
02692 
02693   if (st->facilities & FACIL_WAYPOINT) {
02694     ShowWaypointWindow(Waypoint::From(st));
02695   } else if (IsHangar(tile)) {
02696     ShowDepotWindow(tile, VEH_AIRCRAFT);
02697   } else {
02698     ShowStationViewWindow(st->index);
02699   }
02700   return true;
02701 }
02702 
02703 static VehicleEnterTileStatus VehicleEnter_Station(Vehicle *v, TileIndex tile, int x, int y)
02704 {
02705   if (v->type == VEH_TRAIN) {
02706     StationID station_id = GetStationIndex(tile);
02707     if (!v->current_order.ShouldStopAtStation(v, station_id)) return VETSB_CONTINUE;
02708     if (!IsRailStation(tile) || !Train::From(v)->IsFrontEngine()) return VETSB_CONTINUE;
02709 
02710     int station_ahead;
02711     int station_length;
02712     int stop = GetTrainStopLocation(station_id, tile, Train::From(v), &station_ahead, &station_length);
02713 
02714     /* Stop whenever that amount of station ahead + the distance from the
02715      * begin of the platform to the stop location is longer than the length
02716      * of the platform. Station ahead 'includes' the current tile where the
02717      * vehicle is on, so we need to substract that. */
02718     if (!IsInsideBS(stop + station_ahead, station_length, TILE_SIZE)) return VETSB_CONTINUE;
02719 
02720     DiagDirection dir = DirToDiagDir(v->direction);
02721 
02722     x &= 0xF;
02723     y &= 0xF;
02724 
02725     if (DiagDirToAxis(dir) != AXIS_X) Swap(x, y);
02726     if (y == TILE_SIZE / 2) {
02727       if (dir != DIAGDIR_SE && dir != DIAGDIR_SW) x = TILE_SIZE - 1 - x;
02728       stop &= TILE_SIZE - 1;
02729 
02730       if (x == stop) return VETSB_ENTERED_STATION | (VehicleEnterTileStatus)(station_id << VETS_STATION_ID_OFFSET); // enter station
02731       if (x < stop) {
02732         uint16 spd;
02733 
02734         v->vehstatus |= VS_TRAIN_SLOWING;
02735         spd = max(0, (stop - x) * 20 - 15);
02736         if (spd < v->cur_speed) v->cur_speed = spd;
02737       }
02738     }
02739   } else if (v->type == VEH_ROAD) {
02740     RoadVehicle *rv = RoadVehicle::From(v);
02741     if (rv->state < RVSB_IN_ROAD_STOP && !IsReversingRoadTrackdir((Trackdir)rv->state) && rv->frame == 0) {
02742       if (IsRoadStop(tile) && rv->IsRoadVehFront()) {
02743         /* Attempt to allocate a parking bay in a road stop */
02744         return RoadStop::GetByTile(tile, GetRoadStopType(tile))->Enter(rv) ? VETSB_CONTINUE : VETSB_CANNOT_ENTER;
02745       }
02746     }
02747   }
02748 
02749   return VETSB_CONTINUE;
02750 }
02751 
02758 static bool StationHandleBigTick(BaseStation *st)
02759 {
02760   if (!st->IsInUse() && ++st->delete_ctr >= 8) {
02761     delete st;
02762     return false;
02763   }
02764 
02765   if ((st->facilities & FACIL_WAYPOINT) == 0) UpdateStationAcceptance(Station::From(st), true);
02766 
02767   return true;
02768 }
02769 
02770 static inline void byte_inc_sat(byte *p)
02771 {
02772   byte b = *p + 1;
02773   if (b != 0) *p = b;
02774 }
02775 
02776 static void UpdateStationRating(Station *st)
02777 {
02778   bool waiting_changed = false;
02779 
02780   byte_inc_sat(&st->time_since_load);
02781   byte_inc_sat(&st->time_since_unload);
02782 
02783   const CargoSpec *cs;
02784   FOR_ALL_CARGOSPECS(cs) {
02785     GoodsEntry *ge = &st->goods[cs->Index()];
02786     /* Slowly increase the rating back to his original level in the case we
02787      *  didn't deliver cargo yet to this station. This happens when a bribe
02788      *  failed while you didn't moved that cargo yet to a station. */
02789     if (!HasBit(ge->acceptance_pickup, GoodsEntry::PICKUP) && ge->rating < INITIAL_STATION_RATING) {
02790       ge->rating++;
02791     }
02792 
02793     /* Only change the rating if we are moving this cargo */
02794     if (HasBit(ge->acceptance_pickup, GoodsEntry::PICKUP)) {
02795       byte_inc_sat(&ge->days_since_pickup);
02796 
02797       bool skip = false;
02798       int rating = 0;
02799       uint waiting = ge->cargo.Count();
02800 
02801       if (HasBit(cs->callback_mask, CBM_CARGO_STATION_RATING_CALC)) {
02802         /* Perform custom station rating. If it succeeds the speed, days in transit and
02803          * waiting cargo ratings must not be executed. */
02804 
02805         /* NewGRFs expect last speed to be 0xFF when no vehicle has arrived yet. */
02806         uint last_speed = ge->last_speed;
02807         if (last_speed == 0) last_speed = 0xFF;
02808 
02809         uint32 var18 = min(ge->days_since_pickup, 0xFF) | (min(waiting, 0xFFFF) << 8) | (min(last_speed, 0xFF) << 24);
02810         /* Convert to the 'old' vehicle types */
02811         uint32 var10 = (st->last_vehicle_type == VEH_INVALID) ? 0x0 : (st->last_vehicle_type + 0x10);
02812         uint16 callback = GetCargoCallback(CBID_CARGO_STATION_RATING_CALC, var10, var18, cs);
02813         if (callback != CALLBACK_FAILED) {
02814           skip = true;
02815           rating = GB(callback, 0, 14);
02816 
02817           /* Simulate a 15 bit signed value */
02818           if (HasBit(callback, 14)) rating -= 0x4000;
02819         }
02820       }
02821 
02822       if (!skip) {
02823         int b = ge->last_speed - 85;
02824         if (b >= 0) rating += b >> 2;
02825 
02826         byte days = ge->days_since_pickup;
02827         if (st->last_vehicle_type == VEH_SHIP) days >>= 2;
02828         (days > 21) ||
02829         (rating += 25, days > 12) ||
02830         (rating += 25, days > 6) ||
02831         (rating += 45, days > 3) ||
02832         (rating += 35, true);
02833 
02834         (rating -= 90, waiting > 1500) ||
02835         (rating += 55, waiting > 1000) ||
02836         (rating += 35, waiting > 600) ||
02837         (rating += 10, waiting > 300) ||
02838         (rating += 20, waiting > 100) ||
02839         (rating += 10, true);
02840       }
02841 
02842       if (Company::IsValidID(st->owner) && HasBit(st->town->statues, st->owner)) rating += 26;
02843 
02844       byte age = ge->last_age;
02845       (age >= 3) ||
02846       (rating += 10, age >= 2) ||
02847       (rating += 10, age >= 1) ||
02848       (rating += 13, true);
02849 
02850       {
02851         int or_ = ge->rating; // old rating
02852 
02853         /* only modify rating in steps of -2, -1, 0, 1 or 2 */
02854         ge->rating = rating = or_ + Clamp(Clamp(rating, 0, 255) - or_, -2, 2);
02855 
02856         /* if rating is <= 64 and more than 200 items waiting,
02857          * remove some random amount of goods from the station */
02858         if (rating <= 64 && waiting >= 200) {
02859           int dec = Random() & 0x1F;
02860           if (waiting < 400) dec &= 7;
02861           waiting -= dec + 1;
02862           waiting_changed = true;
02863         }
02864 
02865         /* if rating is <= 127 and there are any items waiting, maybe remove some goods. */
02866         if (rating <= 127 && waiting != 0) {
02867           uint32 r = Random();
02868           if (rating <= (int)GB(r, 0, 7)) {
02869             /* Need to have int, otherwise it will just overflow etc. */
02870             waiting = max((int)waiting - (int)GB(r, 8, 2) - 1, 0);
02871             waiting_changed = true;
02872           }
02873         }
02874 
02875         /* At some point we really must cap the cargo. Previously this
02876          * was a strict 4095, but now we'll have a less strict, but
02877          * increasingly agressive truncation of the amount of cargo. */
02878         static const uint WAITING_CARGO_THRESHOLD  = 1 << 12;
02879         static const uint WAITING_CARGO_CUT_FACTOR = 1 <<  6;
02880         static const uint MAX_WAITING_CARGO        = 1 << 15;
02881 
02882         if (waiting > WAITING_CARGO_THRESHOLD) {
02883           uint difference = waiting - WAITING_CARGO_THRESHOLD;
02884           waiting -= (difference / WAITING_CARGO_CUT_FACTOR);
02885 
02886           waiting = min(waiting, MAX_WAITING_CARGO);
02887           waiting_changed = true;
02888         }
02889 
02890         if (waiting_changed) ge->cargo.Truncate(waiting);
02891       }
02892     }
02893   }
02894 
02895   StationID index = st->index;
02896   if (waiting_changed) {
02897     SetWindowDirty(WC_STATION_VIEW, index); // update whole window
02898   } else {
02899     SetWindowWidgetDirty(WC_STATION_VIEW, index, SVW_RATINGLIST); // update only ratings list
02900   }
02901 }
02902 
02903 /* called for every station each tick */
02904 static void StationHandleSmallTick(BaseStation *st)
02905 {
02906   if ((st->facilities & FACIL_WAYPOINT) != 0 || !st->IsInUse()) return;
02907 
02908   byte b = st->delete_ctr + 1;
02909   if (b >= 185) b = 0;
02910   st->delete_ctr = b;
02911 
02912   if (b == 0) UpdateStationRating(Station::From(st));
02913 }
02914 
02915 void OnTick_Station()
02916 {
02917   if (_game_mode == GM_EDITOR) return;
02918 
02919   BaseStation *st;
02920   FOR_ALL_BASE_STATIONS(st) {
02921     StationHandleSmallTick(st);
02922 
02923     /* Run 250 tick interval trigger for station animation.
02924      * Station index is included so that triggers are not all done
02925      * at the same time. */
02926     if ((_tick_counter + st->index) % 250 == 0) {
02927       /* Stop processing this station if it was deleted */
02928       if (!StationHandleBigTick(st)) continue;
02929       StationAnimationTrigger(st, st->xy, STAT_ANIM_250_TICKS);
02930     }
02931   }
02932 }
02933 
02934 void StationMonthlyLoop()
02935 {
02936   /* not used */
02937 }
02938 
02939 
02940 void ModifyStationRatingAround(TileIndex tile, Owner owner, int amount, uint radius)
02941 {
02942   Station *st;
02943 
02944   FOR_ALL_STATIONS(st) {
02945     if (st->owner == owner &&
02946         DistanceManhattan(tile, st->xy) <= radius) {
02947       for (CargoID i = 0; i < NUM_CARGO; i++) {
02948         GoodsEntry *ge = &st->goods[i];
02949 
02950         if (ge->acceptance_pickup != 0) {
02951           ge->rating = Clamp(ge->rating + amount, 0, 255);
02952         }
02953       }
02954     }
02955   }
02956 }
02957 
02958 static void UpdateStationWaiting(Station *st, CargoID type, uint amount, SourceType source_type, SourceID source_id)
02959 {
02960   st->goods[type].cargo.Append(new CargoPacket(st->index, st->xy, amount, source_type, source_id));
02961   SetBit(st->goods[type].acceptance_pickup, GoodsEntry::PICKUP);
02962 
02963   StationAnimationTrigger(st, st->xy, STAT_ANIM_NEW_CARGO, type);
02964 
02965   SetWindowDirty(WC_STATION_VIEW, st->index);
02966   st->MarkTilesDirty(true);
02967 }
02968 
02969 static bool IsUniqueStationName(const char *name)
02970 {
02971   const Station *st;
02972 
02973   FOR_ALL_STATIONS(st) {
02974     if (st->name != NULL && strcmp(st->name, name) == 0) return false;
02975   }
02976 
02977   return true;
02978 }
02979 
02988 CommandCost CmdRenameStation(TileIndex tile, DoCommandFlag flags, uint32 p1, uint32 p2, const char *text)
02989 {
02990   Station *st = Station::GetIfValid(p1);
02991   if (st == NULL || !CheckOwnership(st->owner)) return CMD_ERROR;
02992 
02993   bool reset = StrEmpty(text);
02994 
02995   if (!reset) {
02996     if (strlen(text) >= MAX_LENGTH_STATION_NAME_BYTES) return CMD_ERROR;
02997     if (!IsUniqueStationName(text)) return_cmd_error(STR_ERROR_NAME_MUST_BE_UNIQUE);
02998   }
02999 
03000   if (flags & DC_EXEC) {
03001     free(st->name);
03002     st->name = reset ? NULL : strdup(text);
03003 
03004     st->UpdateVirtCoord();
03005     InvalidateWindowData(WC_STATION_LIST, st->owner, 1);
03006   }
03007 
03008   return CommandCost();
03009 }
03010 
03017 void FindStationsAroundTiles(const TileArea &location, StationList *stations)
03018 {
03019   /* area to search = producer plus station catchment radius */
03020   int max_rad = (_settings_game.station.modified_catchment ? MAX_CATCHMENT : CA_UNMODIFIED);
03021 
03022   for (int dy = -max_rad; dy < location.h + max_rad; dy++) {
03023     for (int dx = -max_rad; dx < location.w + max_rad; dx++) {
03024       TileIndex cur_tile = TileAddWrap(location.tile, dx, dy);
03025       if (cur_tile == INVALID_TILE || !IsTileType(cur_tile, MP_STATION)) continue;
03026 
03027       Station *st = Station::GetByTile(cur_tile);
03028       if (st == NULL) continue;
03029 
03030       if (_settings_game.station.modified_catchment) {
03031         int rad = st->GetCatchmentRadius();
03032         if (dx < -rad || dx >= rad + location.w || dy < -rad || dy >= rad + location.h) continue;
03033       }
03034 
03035       /* Insert the station in the set. This will fail if it has
03036        * already been added.
03037        */
03038       stations->Include(st);
03039     }
03040   }
03041 }
03042 
03047 const StationList *StationFinder::GetStations()
03048 {
03049   if (this->tile != INVALID_TILE) {
03050     FindStationsAroundTiles(*this, &this->stations);
03051     this->tile = INVALID_TILE;
03052   }
03053   return &this->stations;
03054 }
03055 
03056 uint MoveGoodsToStation(CargoID type, uint amount, SourceType source_type, SourceID source_id, const StationList *all_stations)
03057 {
03058   /* Return if nothing to do. Also the rounding below fails for 0. */
03059   if (amount == 0) return 0;
03060 
03061   Station *st1 = NULL;   // Station with best rating
03062   Station *st2 = NULL;   // Second best station
03063   uint best_rating1 = 0; // rating of st1
03064   uint best_rating2 = 0; // rating of st2
03065 
03066   for (Station * const *st_iter = all_stations->Begin(); st_iter != all_stations->End(); ++st_iter) {
03067     Station *st = *st_iter;
03068 
03069     /* Is the station reserved exclusively for somebody else? */
03070     if (st->town->exclusive_counter > 0 && st->town->exclusivity != st->owner) continue;
03071 
03072     if (st->goods[type].rating == 0) continue; // Lowest possible rating, better not to give cargo anymore
03073 
03074     if (_settings_game.order.selectgoods && st->goods[type].last_speed == 0) continue; // Selectively servicing stations, and not this one
03075 
03076     if (IsCargoInClass(type, CC_PASSENGERS)) {
03077       if (st->facilities == FACIL_TRUCK_STOP) continue; // passengers are never served by just a truck stop
03078     } else {
03079       if (st->facilities == FACIL_BUS_STOP) continue; // non-passengers are never served by just a bus stop
03080     }
03081 
03082     /* This station can be used, add it to st1/st2 */
03083     if (st1 == NULL || st->goods[type].rating >= best_rating1) {
03084       st2 = st1; best_rating2 = best_rating1; st1 = st; best_rating1 = st->goods[type].rating;
03085     } else if (st2 == NULL || st->goods[type].rating >= best_rating2) {
03086       st2 = st; best_rating2 = st->goods[type].rating;
03087     }
03088   }
03089 
03090   /* no stations around at all? */
03091   if (st1 == NULL) return 0;
03092 
03093   if (st2 == NULL) {
03094     /* only one station around */
03095     uint moved = amount * best_rating1 / 256 + 1;
03096     UpdateStationWaiting(st1, type, moved, source_type, source_id);
03097     return moved;
03098   }
03099 
03100   /* several stations around, the best two (highest rating) are in st1 and st2 */
03101   assert(st1 != NULL);
03102   assert(st2 != NULL);
03103   assert(best_rating1 != 0 || best_rating2 != 0);
03104 
03105   /* the 2nd highest one gets a penalty */
03106   best_rating2 >>= 1;
03107 
03108   /* amount given to station 1 */
03109   uint t = (best_rating1 * (amount + 1)) / (best_rating1 + best_rating2);
03110 
03111   uint moved = 0;
03112   if (t != 0) {
03113     moved = t * best_rating1 / 256 + 1;
03114     amount -= t;
03115     UpdateStationWaiting(st1, type, moved, source_type, source_id);
03116   }
03117 
03118   if (amount != 0) {
03119     amount = amount * best_rating2 / 256 + 1;
03120     moved += amount;
03121     UpdateStationWaiting(st2, type, amount, source_type, source_id);
03122   }
03123 
03124   return moved;
03125 }
03126 
03127 void BuildOilRig(TileIndex tile)
03128 {
03129   if (!Station::CanAllocateItem()) {
03130     DEBUG(misc, 0, "Can't allocate station for oilrig at 0x%X, reverting to oilrig only", tile);
03131     return;
03132   }
03133 
03134   Station *st = new Station(tile);
03135   st->town = ClosestTownFromTile(tile, UINT_MAX);
03136 
03137   st->string_id = GenerateStationName(st, tile, STATIONNAMING_OILRIG);
03138 
03139   assert(IsTileType(tile, MP_INDUSTRY));
03140   DeleteAnimatedTile(tile);
03141   MakeOilrig(tile, st->index, GetWaterClass(tile));
03142 
03143   st->owner = OWNER_NONE;
03144   st->airport_type = AT_OILRIG;
03145   st->airport_tile = tile;
03146   st->dock_tile = tile;
03147   st->facilities = FACIL_AIRPORT | FACIL_DOCK;
03148   st->build_date = _date;
03149 
03150   st->rect.BeforeAddTile(tile, StationRect::ADD_FORCE);
03151 
03152   for (CargoID j = 0; j < NUM_CARGO; j++) {
03153     st->goods[j].acceptance_pickup = 0;
03154     st->goods[j].days_since_pickup = 255;
03155     st->goods[j].rating = INITIAL_STATION_RATING;
03156     st->goods[j].last_speed = 0;
03157     st->goods[j].last_age = 255;
03158   }
03159 
03160   st->UpdateVirtCoord();
03161   UpdateStationAcceptance(st, false);
03162   st->RecomputeIndustriesNear();
03163 }
03164 
03165 void DeleteOilRig(TileIndex tile)
03166 {
03167   Station *st = Station::GetByTile(tile);
03168 
03169   MakeWaterKeepingClass(tile, OWNER_NONE);
03170   MarkTileDirtyByTile(tile);
03171 
03172   st->dock_tile = INVALID_TILE;
03173   st->airport_tile = INVALID_TILE;
03174   st->facilities &= ~(FACIL_AIRPORT | FACIL_DOCK);
03175   st->airport_flags = 0;
03176 
03177   st->rect.AfterRemoveTile(st, tile);
03178 
03179   st->UpdateVirtCoord();
03180   st->RecomputeIndustriesNear();
03181   if (!st->IsInUse()) delete st;
03182 }
03183 
03184 static void ChangeTileOwner_Station(TileIndex tile, Owner old_owner, Owner new_owner)
03185 {
03186   if (IsDriveThroughStopTile(tile)) {
03187     for (RoadType rt = ROADTYPE_ROAD; rt < ROADTYPE_END; rt++) {
03188       /* Update all roadtypes, no matter if they are present */
03189       if (GetRoadOwner(tile, rt) == old_owner) {
03190         SetRoadOwner(tile, rt, new_owner == INVALID_OWNER ? OWNER_NONE : new_owner);
03191       }
03192     }
03193   }
03194 
03195   if (!IsTileOwner(tile, old_owner)) return;
03196 
03197   if (new_owner != INVALID_OWNER) {
03198     /* for buoys, owner of tile is owner of water, st->owner == OWNER_NONE */
03199     SetTileOwner(tile, new_owner);
03200     InvalidateWindowClassesData(WC_STATION_LIST, 0);
03201   } else {
03202     if (IsDriveThroughStopTile(tile)) {
03203       /* Remove the drive-through road stop */
03204       DoCommand(tile, 0, (GetStationType(tile) == STATION_TRUCK) ? ROADSTOP_TRUCK : ROADSTOP_BUS, DC_EXEC | DC_BANKRUPT, CMD_REMOVE_ROAD_STOP);
03205       assert(IsTileType(tile, MP_ROAD));
03206       /* Change owner of tile and all roadtypes */
03207       ChangeTileOwner(tile, old_owner, new_owner);
03208     } else {
03209       DoCommand(tile, 0, 0, DC_EXEC | DC_BANKRUPT, CMD_LANDSCAPE_CLEAR);
03210       /* Set tile owner of water under (now removed) buoy and dock to OWNER_NONE.
03211        * Update owner of buoy if it was not removed (was in orders).
03212        * Do not update when owned by OWNER_WATER (sea and rivers). */
03213       if ((IsTileType(tile, MP_WATER) || IsBuoyTile(tile)) && IsTileOwner(tile, old_owner)) SetTileOwner(tile, OWNER_NONE);
03214     }
03215   }
03216 }
03217 
03226 static bool CanRemoveRoadWithStop(TileIndex tile, DoCommandFlag flags)
03227 {
03228   /* Yeah... water can always remove stops, right? */
03229   if (_current_company == OWNER_WATER) return true;
03230 
03231   Owner road_owner = _current_company;
03232   Owner tram_owner = _current_company;
03233 
03234   RoadTypes rts = GetRoadTypes(tile);
03235   if (HasBit(rts, ROADTYPE_ROAD)) road_owner = GetRoadOwner(tile, ROADTYPE_ROAD);
03236   if (HasBit(rts, ROADTYPE_TRAM)) tram_owner = GetRoadOwner(tile, ROADTYPE_TRAM);
03237 
03238   if ((road_owner != OWNER_TOWN && !CheckOwnership(road_owner)) || !CheckOwnership(tram_owner)) return false;
03239 
03240   return road_owner != OWNER_TOWN || CheckAllowRemoveRoad(tile, GetAnyRoadBits(tile, ROADTYPE_ROAD), OWNER_TOWN, ROADTYPE_ROAD, flags);
03241 }
03242 
03243 CommandCost ClearTile_Station(TileIndex tile, DoCommandFlag flags)
03244 {
03245   if (flags & DC_AUTO) {
03246     switch (GetStationType(tile)) {
03247       default: break;
03248       case STATION_RAIL:     return_cmd_error(STR_ERROR_MUST_DEMOLISH_RAILROAD);
03249       case STATION_WAYPOINT: return_cmd_error(STR_ERROR_BUILDING_MUST_BE_DEMOLISHED);
03250       case STATION_AIRPORT:  return_cmd_error(STR_ERROR_MUST_DEMOLISH_AIRPORT_FIRST);
03251       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);
03252       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);
03253       case STATION_BUOY:     return_cmd_error(STR_ERROR_BUOY_IN_THE_WAY);
03254       case STATION_DOCK:     return_cmd_error(STR_ERROR_MUST_DEMOLISH_DOCK_FIRST);
03255       case STATION_OILRIG:
03256         SetDParam(1, STR_INDUSTRY_NAME_OIL_RIG);
03257         return_cmd_error(STR_ERROR_UNMOVABLE_OBJECT_IN_THE_WAY);
03258     }
03259   }
03260 
03261   switch (GetStationType(tile)) {
03262     case STATION_RAIL:     return RemoveRailStation(tile, flags);
03263     case STATION_WAYPOINT: return RemoveRailWaypoint(tile, flags);
03264     case STATION_AIRPORT:  return RemoveAirport(tile, flags);
03265     case STATION_TRUCK:
03266       if (IsDriveThroughStopTile(tile) && !CanRemoveRoadWithStop(tile, flags))
03267         return_cmd_error(STR_ERROR_MUST_DEMOLISH_TRUCK_STATION_FIRST);
03268       return RemoveRoadStop(tile, flags);
03269     case STATION_BUS:
03270       if (IsDriveThroughStopTile(tile) && !CanRemoveRoadWithStop(tile, flags))
03271         return_cmd_error(STR_ERROR_MUST_DEMOLISH_BUS_STATION_FIRST);
03272       return RemoveRoadStop(tile, flags);
03273     case STATION_BUOY:     return RemoveBuoy(tile, flags);
03274     case STATION_DOCK:     return RemoveDock(tile, flags);
03275     default: break;
03276   }
03277 
03278   return CMD_ERROR;
03279 }
03280 
03281 static CommandCost TerraformTile_Station(TileIndex tile, DoCommandFlag flags, uint z_new, Slope tileh_new)
03282 {
03283   if (_settings_game.construction.build_on_slopes && AutoslopeEnabled()) {
03284     /* TODO: If you implement newgrf callback 149 'land slope check', you have to decide what to do with it here.
03285      *       TTDP does not call it.
03286      */
03287     if (!IsSteepSlope(tileh_new) && (GetTileMaxZ(tile) == z_new + GetSlopeMaxZ(tileh_new))) {
03288       switch (GetStationType(tile)) {
03289         case STATION_WAYPOINT:
03290         case STATION_RAIL: {
03291           DiagDirection direction = AxisToDiagDir(GetRailStationAxis(tile));
03292           if (!AutoslopeCheckForEntranceEdge(tile, z_new, tileh_new, direction)) break;
03293           if (!AutoslopeCheckForEntranceEdge(tile, z_new, tileh_new, ReverseDiagDir(direction))) break;
03294           return CommandCost(EXPENSES_CONSTRUCTION, _price[PR_BUILD_FOUNDATION]);
03295         }
03296 
03297         case STATION_AIRPORT:
03298           return CommandCost(EXPENSES_CONSTRUCTION, _price[PR_BUILD_FOUNDATION]);
03299 
03300         case STATION_TRUCK:
03301         case STATION_BUS: {
03302           DiagDirection direction = GetRoadStopDir(tile);
03303           if (!AutoslopeCheckForEntranceEdge(tile, z_new, tileh_new, direction)) break;
03304           if (IsDriveThroughStopTile(tile)) {
03305             if (!AutoslopeCheckForEntranceEdge(tile, z_new, tileh_new, ReverseDiagDir(direction))) break;
03306           }
03307           return CommandCost(EXPENSES_CONSTRUCTION, _price[PR_BUILD_FOUNDATION]);
03308         }
03309 
03310         default: break;
03311       }
03312     }
03313   }
03314   return DoCommand(tile, 0, 0, flags, CMD_LANDSCAPE_CLEAR);
03315 }
03316 
03317 
03318 extern const TileTypeProcs _tile_type_station_procs = {
03319   DrawTile_Station,           // draw_tile_proc
03320   GetSlopeZ_Station,          // get_slope_z_proc
03321   ClearTile_Station,          // clear_tile_proc
03322   NULL,                       // add_accepted_cargo_proc
03323   GetTileDesc_Station,        // get_tile_desc_proc
03324   GetTileTrackStatus_Station, // get_tile_track_status_proc
03325   ClickTile_Station,          // click_tile_proc
03326   AnimateTile_Station,        // animate_tile_proc
03327   TileLoop_Station,           // tile_loop_clear
03328   ChangeTileOwner_Station,    // change_tile_owner_clear
03329   NULL,                       // add_produced_cargo_proc
03330   VehicleEnter_Station,       // vehicle_enter_tile_proc
03331   GetFoundation_Station,      // get_foundation_proc
03332   TerraformTile_Station,      // terraform_tile_proc
03333 };

Generated on Sat Jun 19 17:14:54 2010 for OpenTTD by  doxygen 1.6.1