station_cmd.cpp

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00001 /* $Id: station_cmd.cpp 19132 2010-02-14 16:31:35Z alberth $ */
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)
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           CommandCost ret = DoCommand(tile_cur, 0, track, flags, CMD_REMOVE_SINGLE_RAIL);
00753           if (ret.Failed()) return ret;
00754           cost.AddCost(ret);
00755           /* With flags & ~DC_EXEC CmdLandscapeClear would fail since the rail still exists */
00756           continue;
00757         }
00758       }
00759       CommandCost ret = DoCommand(tile_cur, 0, 0, flags, CMD_LANDSCAPE_CLEAR);
00760       if (ret.Failed()) return ret;
00761       cost.AddCost(ret);
00762     }
00763   }
00764 
00765   return cost;
00766 }
00767 
00775 bool CanExpandRailStation(const BaseStation *st, TileArea &new_ta, Axis axis)
00776 {
00777   TileArea cur_ta = st->train_station;
00778 
00779   if (_settings_game.station.nonuniform_stations) {
00780     /* determine new size of train station region.. */
00781     int x = min(TileX(cur_ta.tile), TileX(new_ta.tile));
00782     int y = min(TileY(cur_ta.tile), TileY(new_ta.tile));
00783     new_ta.w = max(TileX(cur_ta.tile) + cur_ta.w, TileX(new_ta.tile) + new_ta.w) - x;
00784     new_ta.h = max(TileY(cur_ta.tile) + cur_ta.h, TileY(new_ta.tile) + new_ta.h) - y;
00785     new_ta.tile = TileXY(x, y);
00786   } else {
00787     /* do not allow modifying non-uniform stations,
00788      * the uniform-stations code wouldn't handle it well */
00789     TILE_LOOP(t, cur_ta.w, cur_ta.h, cur_ta.tile) {
00790       if (!st->TileBelongsToRailStation(t)) { // there may be adjoined station
00791         _error_message = STR_ERROR_NONUNIFORM_STATIONS_DISALLOWED;
00792         return false;
00793       }
00794     }
00795 
00796     /* check so the orientation is the same */
00797     if (GetRailStationAxis(cur_ta.tile) != axis) {
00798       _error_message = STR_ERROR_NONUNIFORM_STATIONS_DISALLOWED;
00799       return false;
00800     }
00801 
00802     /* check if the new station adjoins the old station in either direction */
00803     if (cur_ta.w == new_ta.w && cur_ta.tile == new_ta.tile + TileDiffXY(0, new_ta.h)) {
00804       /* above */
00805       new_ta.h += cur_ta.h;
00806     } else if (cur_ta.w == new_ta.w && cur_ta.tile == new_ta.tile - TileDiffXY(0, cur_ta.h)) {
00807       /* below */
00808       new_ta.tile = cur_ta.tile;
00809       new_ta.h += new_ta.h;
00810     } else if (cur_ta.h == new_ta.h && cur_ta.tile == new_ta.tile + TileDiffXY(new_ta.w, 0)) {
00811       /* to the left */
00812       new_ta.w += cur_ta.w;
00813     } else if (cur_ta.h == new_ta.h && cur_ta.tile == new_ta.tile - TileDiffXY(cur_ta.w, 0)) {
00814       /* to the right */
00815       new_ta.tile = cur_ta.tile;
00816       new_ta.w += cur_ta.w;
00817     } else {
00818       _error_message = STR_ERROR_NONUNIFORM_STATIONS_DISALLOWED;
00819       return false;
00820     }
00821   }
00822   /* make sure the final size is not too big. */
00823   if (new_ta.w > _settings_game.station.station_spread || new_ta.h > _settings_game.station.station_spread) {
00824     _error_message = STR_ERROR_STATION_TOO_SPREAD_OUT;
00825     return false;
00826   }
00827 
00828   return true;
00829 }
00830 
00831 static inline byte *CreateSingle(byte *layout, int n)
00832 {
00833   int i = n;
00834   do *layout++ = 0; while (--i);
00835   layout[((n - 1) >> 1) - n] = 2;
00836   return layout;
00837 }
00838 
00839 static inline byte *CreateMulti(byte *layout, int n, byte b)
00840 {
00841   int i = n;
00842   do *layout++ = b; while (--i);
00843   if (n > 4) {
00844     layout[0 - n] = 0;
00845     layout[n - 1 - n] = 0;
00846   }
00847   return layout;
00848 }
00849 
00850 void GetStationLayout(byte *layout, int numtracks, int plat_len, const StationSpec *statspec)
00851 {
00852   if (statspec != NULL && statspec->lengths >= plat_len &&
00853       statspec->platforms[plat_len - 1] >= numtracks &&
00854       statspec->layouts[plat_len - 1][numtracks - 1]) {
00855     /* Custom layout defined, follow it. */
00856     memcpy(layout, statspec->layouts[plat_len - 1][numtracks - 1],
00857       plat_len * numtracks);
00858     return;
00859   }
00860 
00861   if (plat_len == 1) {
00862     CreateSingle(layout, numtracks);
00863   } else {
00864     if (numtracks & 1) layout = CreateSingle(layout, plat_len);
00865     numtracks >>= 1;
00866 
00867     while (--numtracks >= 0) {
00868       layout = CreateMulti(layout, plat_len, 4);
00869       layout = CreateMulti(layout, plat_len, 6);
00870     }
00871   }
00872 }
00873 
00885 template <class T, StringID error_message>
00886 CommandCost FindJoiningBaseStation(StationID existing_station, StationID station_to_join, bool adjacent, TileArea ta, T **st)
00887 {
00888   assert(*st == NULL);
00889   bool check_surrounding = true;
00890 
00891   if (_settings_game.station.adjacent_stations) {
00892     if (existing_station != INVALID_STATION) {
00893       if (adjacent && existing_station != station_to_join) {
00894         /* You can't build an adjacent station over the top of one that
00895          * already exists. */
00896         return_cmd_error(error_message);
00897       } else {
00898         /* Extend the current station, and don't check whether it will
00899          * be near any other stations. */
00900         *st = T::GetIfValid(existing_station);
00901         check_surrounding = (*st == NULL);
00902       }
00903     } else {
00904       /* There's no station here. Don't check the tiles surrounding this
00905        * one if the company wanted to build an adjacent station. */
00906       if (adjacent) check_surrounding = false;
00907     }
00908   }
00909 
00910   if (check_surrounding) {
00911     /* Make sure there are no similar stations around us. */
00912     if (!GetStationAround(ta, existing_station, st)) return CMD_ERROR;
00913   }
00914 
00915   /* Distant join */
00916   if (*st == NULL && station_to_join != INVALID_STATION) *st = T::GetIfValid(station_to_join);
00917 
00918   return CommandCost();
00919 }
00920 
00930 static CommandCost FindJoiningStation(StationID existing_station, StationID station_to_join, bool adjacent, TileArea ta, Station **st)
00931 {
00932   return FindJoiningBaseStation<Station, STR_ERROR_MUST_REMOVE_RAILWAY_STATION_FIRST>(existing_station, station_to_join, adjacent, ta, st);
00933 }
00934 
00944 CommandCost FindJoiningWaypoint(StationID existing_waypoint, StationID waypoint_to_join, bool adjacent, TileArea ta, Waypoint **wp)
00945 {
00946   return FindJoiningBaseStation<Waypoint, STR_ERROR_MUST_REMOVE_RAILWAYPOINT_FIRST>(existing_waypoint, waypoint_to_join, adjacent, ta, wp);
00947 }
00948 
00966 CommandCost CmdBuildRailStation(TileIndex tile_org, DoCommandFlag flags, uint32 p1, uint32 p2, const char *text)
00967 {
00968   /* Unpack parameters */
00969   RailType rt    = (RailType)GB(p1, 0, 4);
00970   Axis axis      = Extract<Axis, 4>(p1);
00971   byte numtracks = GB(p1,  8, 8);
00972   byte plat_len  = GB(p1, 16, 8);
00973   bool adjacent  = HasBit(p1, 24);
00974 
00975   StationClassID spec_class = (StationClassID)GB(p2, 0, 8);
00976   byte spec_index           = GB(p2, 8, 8);
00977   StationID station_to_join = GB(p2, 16, 16);
00978 
00979   /* Does the authority allow this? */
00980   if (!CheckIfAuthorityAllowsNewStation(tile_org, flags)) return CMD_ERROR;
00981   if (!ValParamRailtype(rt)) return CMD_ERROR;
00982 
00983   /* Check if the given station class is valid */
00984   if ((uint)spec_class >= GetNumStationClasses()) return CMD_ERROR;
00985   if (spec_index >= GetNumCustomStations(spec_class)) return CMD_ERROR;
00986   if (plat_len == 0 || numtracks == 0) return CMD_ERROR;
00987 
00988   int w_org, h_org;
00989   if (axis == AXIS_X) {
00990     w_org = plat_len;
00991     h_org = numtracks;
00992   } else {
00993     h_org = plat_len;
00994     w_org = numtracks;
00995   }
00996 
00997   bool reuse = (station_to_join != NEW_STATION);
00998   if (!reuse) station_to_join = INVALID_STATION;
00999   bool distant_join = (station_to_join != INVALID_STATION);
01000 
01001   if (distant_join && (!_settings_game.station.distant_join_stations || !Station::IsValidID(station_to_join))) return CMD_ERROR;
01002 
01003   if (h_org > _settings_game.station.station_spread || w_org > _settings_game.station.station_spread) return CMD_ERROR;
01004 
01005   /* these values are those that will be stored in train_tile and station_platforms */
01006   TileArea new_location(tile_org, w_org, h_org);
01007 
01008   /* Make sure the area below consists of clear tiles. (OR tiles belonging to a certain rail station) */
01009   StationID est = INVALID_STATION;
01010   /* Clear the land below the station. */
01011   CommandCost cost = CheckFlatLandBelow(tile_org, w_org, h_org, flags, 5 << axis, _settings_game.station.nonuniform_stations ? &est : NULL, true, rt);
01012   if (cost.Failed()) return cost;
01013   /* Add construction expenses. */
01014   cost.AddCost((numtracks * _price[PR_BUILD_STATION_RAIL] + _price[PR_BUILD_STATION_RAIL_LENGTH]) * plat_len);
01015 
01016   Station *st = NULL;
01017   CommandCost ret = FindJoiningStation(est, station_to_join, adjacent, new_location, &st);
01018   if (ret.Failed()) return ret;
01019 
01020   /* See if there is a deleted station close to us. */
01021   if (st == NULL && reuse) st = GetClosestDeletedStation(tile_org);
01022 
01023   if (st != NULL) {
01024     /* Reuse an existing station. */
01025     if (st->owner != _current_company)
01026       return_cmd_error(STR_ERROR_TOO_CLOSE_TO_ANOTHER_STATION);
01027 
01028     if (st->train_station.tile != INVALID_TILE) {
01029       /* check if we want to expanding an already existing station? */
01030       if (!_settings_game.station.join_stations)
01031         return_cmd_error(STR_ERROR_TOO_CLOSE_TO_ANOTHER_RAILROAD);
01032       if (!CanExpandRailStation(st, new_location, axis))
01033         return CMD_ERROR;
01034     }
01035 
01036     /* XXX can't we pack this in the "else" part of the if above? */
01037     if (!st->rect.BeforeAddRect(tile_org, w_org, h_org, StationRect::ADD_TEST)) return CMD_ERROR;
01038   } else {
01039     /* allocate and initialize new station */
01040     if (!Station::CanAllocateItem()) return_cmd_error(STR_ERROR_TOO_MANY_STATIONS_LOADING);
01041 
01042     if (flags & DC_EXEC) {
01043       st = new Station(tile_org);
01044 
01045       st->town = ClosestTownFromTile(tile_org, UINT_MAX);
01046       st->string_id = GenerateStationName(st, tile_org, STATIONNAMING_RAIL);
01047 
01048       if (Company::IsValidID(_current_company)) {
01049         SetBit(st->town->have_ratings, _current_company);
01050       }
01051     }
01052   }
01053 
01054   /* Check if we can allocate a custom stationspec to this station */
01055   const StationSpec *statspec = GetCustomStationSpec(spec_class, spec_index);
01056   int specindex = AllocateSpecToStation(statspec, st, (flags & DC_EXEC) != 0);
01057   if (specindex == -1) return_cmd_error(STR_ERROR_TOO_MANY_STATION_SPECS);
01058 
01059   if (statspec != NULL) {
01060     /* Perform NewStation checks */
01061 
01062     /* Check if the station size is permitted */
01063     if (HasBit(statspec->disallowed_platforms, numtracks - 1) || HasBit(statspec->disallowed_lengths, plat_len - 1)) {
01064       return CMD_ERROR;
01065     }
01066 
01067     /* Check if the station is buildable */
01068     if (HasBit(statspec->callback_mask, CBM_STATION_AVAIL) && GB(GetStationCallback(CBID_STATION_AVAILABILITY, 0, 0, statspec, NULL, INVALID_TILE), 0, 8) == 0) {
01069       return CMD_ERROR;
01070     }
01071   }
01072 
01073   if (flags & DC_EXEC) {
01074     TileIndexDiff tile_delta;
01075     byte *layout_ptr;
01076     byte numtracks_orig;
01077     Track track;
01078 
01079     st->train_station = new_location;
01080     st->AddFacility(FACIL_TRAIN, new_location.tile);
01081 
01082     st->rect.BeforeAddRect(tile_org, w_org, h_org, StationRect::ADD_TRY);
01083 
01084     if (statspec != NULL) {
01085       /* Include this station spec's animation trigger bitmask
01086        * in the station's cached copy. */
01087       st->cached_anim_triggers |= statspec->anim_triggers;
01088     }
01089 
01090     tile_delta = (axis == AXIS_X ? TileDiffXY(1, 0) : TileDiffXY(0, 1));
01091     track = AxisToTrack(axis);
01092 
01093     layout_ptr = AllocaM(byte, numtracks * plat_len);
01094     GetStationLayout(layout_ptr, numtracks, plat_len, statspec);
01095 
01096     numtracks_orig = numtracks;
01097 
01098     SmallVector<Train*, 4> affected_vehicles;
01099     do {
01100       TileIndex tile = tile_org;
01101       int w = plat_len;
01102       do {
01103         byte layout = *layout_ptr++;
01104         if (IsRailStationTile(tile) && HasStationReservation(tile)) {
01105           /* Check for trains having a reservation for this tile. */
01106           Train *v = GetTrainForReservation(tile, AxisToTrack(GetRailStationAxis(tile)));
01107           if (v != NULL) {
01108             FreeTrainTrackReservation(v);
01109             *affected_vehicles.Append() = v;
01110             if (IsRailStationTile(v->tile)) SetRailStationPlatformReservation(v->tile, TrackdirToExitdir(v->GetVehicleTrackdir()), false);
01111             for (; v->Next() != NULL; v = v->Next()) { }
01112             if (IsRailStationTile(v->tile)) SetRailStationPlatformReservation(v->tile, TrackdirToExitdir(ReverseTrackdir(v->GetVehicleTrackdir())), false);
01113           }
01114         }
01115 
01116         /* Remove animation if overbuilding */
01117         DeleteAnimatedTile(tile);
01118         byte old_specindex = HasStationTileRail(tile) ? GetCustomStationSpecIndex(tile) : 0;
01119         MakeRailStation(tile, st->owner, st->index, axis, layout & ~1, rt);
01120         /* Free the spec if we overbuild something */
01121         DeallocateSpecFromStation(st, old_specindex);
01122 
01123         SetCustomStationSpecIndex(tile, specindex);
01124         SetStationTileRandomBits(tile, GB(Random(), 0, 4));
01125         SetStationAnimationFrame(tile, 0);
01126 
01127         if (statspec != NULL) {
01128           /* Use a fixed axis for GetPlatformInfo as our platforms / numtracks are always the right way around */
01129           uint32 platinfo = GetPlatformInfo(AXIS_X, 0, plat_len, numtracks_orig, plat_len - w, numtracks_orig - numtracks, false);
01130 
01131           /* As the station is not yet completely finished, the station does not yet exist. */
01132           uint16 callback = GetStationCallback(CBID_STATION_TILE_LAYOUT, platinfo, 0, statspec, NULL, tile);
01133           if (callback != CALLBACK_FAILED && callback < 8) SetStationGfx(tile, (callback & ~1) + axis);
01134 
01135           /* Trigger station animation -- after building? */
01136           StationAnimationTrigger(st, tile, STAT_ANIM_BUILT);
01137         }
01138 
01139         tile += tile_delta;
01140       } while (--w);
01141       AddTrackToSignalBuffer(tile_org, track, _current_company);
01142       YapfNotifyTrackLayoutChange(tile_org, track);
01143       tile_org += tile_delta ^ TileDiffXY(1, 1); // perpendicular to tile_delta
01144     } while (--numtracks);
01145 
01146     for (uint i = 0; i < affected_vehicles.Length(); ++i) {
01147       /* Restore reservations of trains. */
01148       Train *v = affected_vehicles[i];
01149       if (IsRailStationTile(v->tile)) SetRailStationPlatformReservation(v->tile, TrackdirToExitdir(v->GetVehicleTrackdir()), true);
01150       TryPathReserve(v, true, true);
01151       for (; v->Next() != NULL; v = v->Next()) { }
01152       if (IsRailStationTile(v->tile)) SetRailStationPlatformReservation(v->tile, TrackdirToExitdir(ReverseTrackdir(v->GetVehicleTrackdir())), true);
01153     }
01154 
01155     st->MarkTilesDirty(false);
01156     st->UpdateVirtCoord();
01157     UpdateStationAcceptance(st, false);
01158     st->RecomputeIndustriesNear();
01159     InvalidateWindowData(WC_SELECT_STATION, 0, 0);
01160     InvalidateWindowData(WC_STATION_LIST, st->owner, 0);
01161     SetWindowWidgetDirty(WC_STATION_VIEW, st->index, SVW_TRAINS);
01162   }
01163 
01164   return cost;
01165 }
01166 
01167 static void MakeRailStationAreaSmaller(BaseStation *st)
01168 {
01169   TileArea ta = st->train_station;
01170 
01171 restart:
01172 
01173   /* too small? */
01174   if (ta.w != 0 && ta.h != 0) {
01175     /* check the left side, x = constant, y changes */
01176     for (uint i = 0; !st->TileBelongsToRailStation(ta.tile + TileDiffXY(0, i));) {
01177       /* the left side is unused? */
01178       if (++i == ta.h) {
01179         ta.tile += TileDiffXY(1, 0);
01180         ta.w--;
01181         goto restart;
01182       }
01183     }
01184 
01185     /* check the right side, x = constant, y changes */
01186     for (uint i = 0; !st->TileBelongsToRailStation(ta.tile + TileDiffXY(ta.w - 1, i));) {
01187       /* the right side is unused? */
01188       if (++i == ta.h) {
01189         ta.w--;
01190         goto restart;
01191       }
01192     }
01193 
01194     /* check the upper side, y = constant, x changes */
01195     for (uint i = 0; !st->TileBelongsToRailStation(ta.tile + TileDiffXY(i, 0));) {
01196       /* the left side is unused? */
01197       if (++i == ta.w) {
01198         ta.tile += TileDiffXY(0, 1);
01199         ta.h--;
01200         goto restart;
01201       }
01202     }
01203 
01204     /* check the lower side, y = constant, x changes */
01205     for (uint i = 0; !st->TileBelongsToRailStation(ta.tile + TileDiffXY(i, ta.h - 1));) {
01206       /* the left side is unused? */
01207       if (++i == ta.w) {
01208         ta.h--;
01209         goto restart;
01210       }
01211     }
01212   } else {
01213     ta.Clear();
01214   }
01215 
01216   st->train_station = ta;
01217 }
01218 
01229 template <class T>
01230 CommandCost RemoveFromRailBaseStation(TileArea ta, SmallVector<T *, 4> &affected_stations, DoCommandFlag flags, Money removal_cost, bool keep_rail)
01231 {
01232   /* Count of the number of tiles removed */
01233   int quantity = 0;
01234   CommandCost total_cost(EXPENSES_CONSTRUCTION);
01235 
01236   /* Do the action for every tile into the area */
01237   TILE_AREA_LOOP(tile, ta) {
01238     /* Make sure the specified tile is a rail station */
01239     if (!HasStationTileRail(tile)) continue;
01240 
01241     /* If there is a vehicle on ground, do not allow to remove (flood) the tile */
01242     if (!EnsureNoVehicleOnGround(tile)) continue;
01243 
01244     /* Check ownership of station */
01245     T *st = T::GetByTile(tile);
01246     if (st == NULL) continue;
01247     if (_current_company != OWNER_WATER && !CheckOwnership(st->owner)) continue;
01248 
01249     /* Do not allow removing from stations if non-uniform stations are not enabled
01250      * The check must be here to give correct error message
01251      */
01252     if (!_settings_game.station.nonuniform_stations) return_cmd_error(STR_ERROR_NONUNIFORM_STATIONS_DISALLOWED);
01253 
01254     /* If we reached here, the tile is valid so increase the quantity of tiles we will remove */
01255     quantity++;
01256 
01257     if (flags & DC_EXEC) {
01258       /* read variables before the station tile is removed */
01259       uint specindex = GetCustomStationSpecIndex(tile);
01260       Track track = GetRailStationTrack(tile);
01261       Owner owner = GetTileOwner(tile);
01262       RailType rt = GetRailType(tile);
01263       Train *v = NULL;
01264 
01265       if (HasStationReservation(tile)) {
01266         v = GetTrainForReservation(tile, track);
01267         if (v != NULL) {
01268           /* Free train reservation. */
01269           FreeTrainTrackReservation(v);
01270           if (IsRailStationTile(v->tile)) SetRailStationPlatformReservation(v->tile, TrackdirToExitdir(v->GetVehicleTrackdir()), false);
01271           Vehicle *temp = v;
01272           for (; temp->Next() != NULL; temp = temp->Next()) { }
01273           if (IsRailStationTile(temp->tile)) SetRailStationPlatformReservation(temp->tile, TrackdirToExitdir(ReverseTrackdir(temp->GetVehicleTrackdir())), false);
01274         }
01275       }
01276 
01277       DoClearSquare(tile);
01278       if (keep_rail) MakeRailNormal(tile, owner, TrackToTrackBits(track), rt);
01279 
01280       st->rect.AfterRemoveTile(st, tile);
01281       AddTrackToSignalBuffer(tile, track, owner);
01282       YapfNotifyTrackLayoutChange(tile, track);
01283 
01284       DeallocateSpecFromStation(st, specindex);
01285 
01286       affected_stations.Include(st);
01287 
01288       if (v != NULL) {
01289         /* Restore station reservation. */
01290         if (IsRailStationTile(v->tile)) SetRailStationPlatformReservation(v->tile, TrackdirToExitdir(v->GetVehicleTrackdir()), true);
01291         TryPathReserve(v, true, true);
01292         for (; v->Next() != NULL; v = v->Next()) { }
01293         if (IsRailStationTile(v->tile)) SetRailStationPlatformReservation(v->tile, TrackdirToExitdir(ReverseTrackdir(v->GetVehicleTrackdir())), true);
01294       }
01295     }
01296     if (keep_rail) {
01297       /* Don't refund the 'steel' of the track! */
01298       total_cost.AddCost(-_price[PR_CLEAR_RAIL]);
01299     }
01300   }
01301 
01302   if (quantity == 0) return CMD_ERROR;
01303 
01304   for (T **stp = affected_stations.Begin(); stp != affected_stations.End(); stp++) {
01305     T *st = *stp;
01306 
01307     /* now we need to make the "spanned" area of the railway station smaller
01308      * if we deleted something at the edges.
01309      * we also need to adjust train_tile. */
01310     MakeRailStationAreaSmaller(st);
01311     UpdateStationSignCoord(st);
01312 
01313     /* if we deleted the whole station, delete the train facility. */
01314     if (st->train_station.tile == INVALID_TILE) {
01315       st->facilities &= ~FACIL_TRAIN;
01316       SetWindowWidgetDirty(WC_STATION_VIEW, st->index, SVW_TRAINS);
01317       st->UpdateVirtCoord();
01318       DeleteStationIfEmpty(st);
01319     }
01320   }
01321 
01322   total_cost.AddCost(quantity * removal_cost);
01323   return total_cost;
01324 }
01325 
01336 CommandCost CmdRemoveFromRailStation(TileIndex start, DoCommandFlag flags, uint32 p1, uint32 p2, const char *text)
01337 {
01338   TileIndex end = p1 == 0 ? start : p1;
01339   if (start >= MapSize() || end >= MapSize()) return CMD_ERROR;
01340 
01341   TileArea ta(start, end);
01342   SmallVector<Station *, 4> affected_stations;
01343 
01344   CommandCost ret = RemoveFromRailBaseStation(ta, affected_stations, flags, _price[PR_CLEAR_STATION_RAIL], HasBit(p2, 0));
01345   if (ret.Failed()) return ret;
01346 
01347   /* Do all station specific functions here. */
01348   for (Station **stp = affected_stations.Begin(); stp != affected_stations.End(); stp++) {
01349     Station *st = *stp;
01350 
01351     if (st->train_station.tile == INVALID_TILE) SetWindowWidgetDirty(WC_STATION_VIEW, st->index, SVW_TRAINS);
01352     st->MarkTilesDirty(false);
01353     st->RecomputeIndustriesNear();
01354   }
01355 
01356   /* Now apply the rail cost to the number that we deleted */
01357   return ret;
01358 }
01359 
01370 CommandCost CmdRemoveFromRailWaypoint(TileIndex start, DoCommandFlag flags, uint32 p1, uint32 p2, const char *text)
01371 {
01372   TileIndex end = p1 == 0 ? start : p1;
01373   if (start >= MapSize() || end >= MapSize()) return CMD_ERROR;
01374 
01375   TileArea ta(start, end);
01376   SmallVector<Waypoint *, 4> affected_stations;
01377 
01378   return RemoveFromRailBaseStation(ta, affected_stations, flags, _price[PR_CLEAR_WAYPOINT_RAIL], HasBit(p2, 0));
01379 }
01380 
01381 
01389 template <class T>
01390 CommandCost RemoveRailStation(T *st, DoCommandFlag flags)
01391 {
01392   /* Current company owns the station? */
01393   if (_current_company != OWNER_WATER && !CheckOwnership(st->owner)) return CMD_ERROR;
01394 
01395   /* determine width and height of platforms */
01396   TileArea ta = st->train_station;
01397 
01398   assert(ta.w != 0 && ta.h != 0);
01399 
01400   CommandCost cost(EXPENSES_CONSTRUCTION);
01401   /* clear all areas of the station */
01402   TILE_AREA_LOOP(tile, ta) {
01403     /* for nonuniform stations, only remove tiles that are actually train station tiles */
01404     if (!st->TileBelongsToRailStation(tile)) continue;
01405 
01406     if (!EnsureNoVehicleOnGround(tile)) return CMD_ERROR;
01407 
01408     cost.AddCost(_price[PR_CLEAR_STATION_RAIL]);
01409     if (flags & DC_EXEC) {
01410       /* read variables before the station tile is removed */
01411       Track track = GetRailStationTrack(tile);
01412       Owner owner = GetTileOwner(tile); // _current_company can be OWNER_WATER
01413       Train *v = NULL;
01414       if (HasStationReservation(tile)) {
01415         v = GetTrainForReservation(tile, track);
01416         if (v != NULL) FreeTrainTrackReservation(v);
01417       }
01418       DoClearSquare(tile);
01419       AddTrackToSignalBuffer(tile, track, owner);
01420       YapfNotifyTrackLayoutChange(tile, track);
01421       if (v != NULL) TryPathReserve(v, true);
01422     }
01423   }
01424 
01425   if (flags & DC_EXEC) {
01426     st->rect.AfterRemoveRect(st, st->train_station.tile, st->train_station.w, st->train_station.h);
01427 
01428     st->train_station.Clear();
01429 
01430     st->facilities &= ~FACIL_TRAIN;
01431 
01432     free(st->speclist);
01433     st->num_specs = 0;
01434     st->speclist  = NULL;
01435     st->cached_anim_triggers = 0;
01436 
01437     SetWindowWidgetDirty(WC_STATION_VIEW, st->index, SVW_TRAINS);
01438     st->UpdateVirtCoord();
01439     DeleteStationIfEmpty(st);
01440   }
01441 
01442   return cost;
01443 }
01444 
01451 static CommandCost RemoveRailStation(TileIndex tile, DoCommandFlag flags)
01452 {
01453   /* if there is flooding and non-uniform stations are enabled, remove platforms tile by tile */
01454   if (_current_company == OWNER_WATER && _settings_game.station.nonuniform_stations) {
01455     return DoCommand(tile, 0, 0, DC_EXEC, CMD_REMOVE_FROM_RAIL_STATION);
01456   }
01457 
01458   Station *st = Station::GetByTile(tile);
01459   CommandCost cost = RemoveRailStation(st, flags);
01460 
01461   if (flags & DC_EXEC) st->RecomputeIndustriesNear();
01462 
01463   return cost;
01464 }
01465 
01472 static CommandCost RemoveRailWaypoint(TileIndex tile, DoCommandFlag flags)
01473 {
01474   /* if there is flooding and non-uniform stations are enabled, remove waypoints tile by tile */
01475   if (_current_company == OWNER_WATER && _settings_game.station.nonuniform_stations) {
01476     return DoCommand(tile, 0, 0, DC_EXEC, CMD_REMOVE_FROM_RAIL_WAYPOINT);
01477   }
01478 
01479   return RemoveRailStation(Waypoint::GetByTile(tile), flags);
01480 }
01481 
01482 
01488 static RoadStop **FindRoadStopSpot(bool truck_station, Station *st)
01489 {
01490   RoadStop **primary_stop = (truck_station) ? &st->truck_stops : &st->bus_stops;
01491 
01492   if (*primary_stop == NULL) {
01493     /* we have no roadstop of the type yet, so write a "primary stop" */
01494     return primary_stop;
01495   } else {
01496     /* there are stops already, so append to the end of the list */
01497     RoadStop *stop = *primary_stop;
01498     while (stop->next != NULL) stop = stop->next;
01499     return &stop->next;
01500   }
01501 }
01502 
01515 CommandCost CmdBuildRoadStop(TileIndex tile, DoCommandFlag flags, uint32 p1, uint32 p2, const char *text)
01516 {
01517   bool type = HasBit(p2, 0);
01518   bool is_drive_through = HasBit(p2, 1);
01519   bool build_over_road  = is_drive_through && IsNormalRoadTile(tile);
01520   RoadTypes rts = (RoadTypes)GB(p2, 2, 2);
01521   StationID station_to_join = GB(p2, 16, 16);
01522   bool reuse = (station_to_join != NEW_STATION);
01523   if (!reuse) station_to_join = INVALID_STATION;
01524   bool distant_join = (station_to_join != INVALID_STATION);
01525   Owner tram_owner = _current_company;
01526   Owner road_owner = _current_company;
01527 
01528   if (distant_join && (!_settings_game.station.distant_join_stations || !Station::IsValidID(station_to_join))) return CMD_ERROR;
01529 
01530   if (!AreValidRoadTypes(rts) || !HasRoadTypesAvail(_current_company, rts)) return CMD_ERROR;
01531 
01532   /* Trams only have drive through stops */
01533   if (!is_drive_through && HasBit(rts, ROADTYPE_TRAM)) return CMD_ERROR;
01534 
01535   /* Saveguard the parameters */
01536   if (!IsValidDiagDirection((DiagDirection)p1)) return CMD_ERROR;
01537   /* If it is a drive-through stop check for valid axis */
01538   if (is_drive_through && !IsValidAxis((Axis)p1)) return CMD_ERROR;
01539   /* Road bits in the wrong direction */
01540   if (build_over_road && (GetAllRoadBits(tile) & ((Axis)p1 == AXIS_X ? ROAD_Y : ROAD_X)) != 0) return_cmd_error(STR_ERROR_DRIVE_THROUGH_DIRECTION);
01541 
01542   if (!CheckIfAuthorityAllowsNewStation(tile, flags)) return CMD_ERROR;
01543 
01544   RoadTypes cur_rts = IsNormalRoadTile(tile) ? GetRoadTypes(tile) : ROADTYPES_NONE;
01545   uint num_roadbits = 0;
01546   /* Not allowed to build over this road */
01547   if (build_over_road) {
01548     /* there is a road, check if we can build road+tram stop over it */
01549     if (HasBit(cur_rts, ROADTYPE_ROAD)) {
01550       road_owner = GetRoadOwner(tile, ROADTYPE_ROAD);
01551       if (road_owner == OWNER_TOWN) {
01552         if (!_settings_game.construction.road_stop_on_town_road) return_cmd_error(STR_ERROR_DRIVE_THROUGH_ON_TOWN_ROAD);
01553       } else if (!_settings_game.construction.road_stop_on_competitor_road && road_owner != OWNER_NONE && !CheckOwnership(road_owner)) {
01554         return CMD_ERROR;
01555       }
01556       num_roadbits += CountBits(GetRoadBits(tile, ROADTYPE_ROAD));
01557     }
01558 
01559     /* there is a tram, check if we can build road+tram stop over it */
01560     if (HasBit(cur_rts, ROADTYPE_TRAM)) {
01561       tram_owner = GetRoadOwner(tile, ROADTYPE_TRAM);
01562       if (!_settings_game.construction.road_stop_on_competitor_road && tram_owner != OWNER_NONE && !CheckOwnership(tram_owner)) {
01563         return CMD_ERROR;
01564       }
01565       num_roadbits += CountBits(GetRoadBits(tile, ROADTYPE_TRAM));
01566     }
01567 
01568     /* Don't allow building the roadstop when vehicles are already driving on it */
01569     if (!EnsureNoVehicleOnGround(tile)) return CMD_ERROR;
01570 
01571     /* Do not remove roadtypes! */
01572     rts |= cur_rts;
01573   }
01574 
01575   CommandCost cost = CheckFlatLandBelow(tile, 1, 1, flags, is_drive_through ? 5 << p1 : 1 << p1, NULL, !build_over_road);
01576   if (cost.Failed()) return cost;
01577   uint roadbits_to_build = CountBits(rts) * 2 - num_roadbits;
01578   cost.AddCost(_price[PR_BUILD_ROAD] * roadbits_to_build);
01579 
01580   Station *st = NULL;
01581   CommandCost ret = FindJoiningStation(INVALID_STATION, station_to_join, HasBit(p2, 5), TileArea(tile, 1, 1), &st);
01582   if (ret.Failed()) return ret;
01583 
01584   /* Find a deleted station close to us */
01585   if (st == NULL && reuse) st = GetClosestDeletedStation(tile);
01586 
01587   /* give us a road stop in the list, and check if something went wrong */
01588   if (!RoadStop::CanAllocateItem()) return_cmd_error(type ? STR_ERROR_TOO_MANY_TRUCK_STOPS : STR_ERROR_TOO_MANY_BUS_STOPS);
01589 
01590   if (st != NULL) {
01591     if (st->owner != _current_company) {
01592       return_cmd_error(STR_ERROR_TOO_CLOSE_TO_ANOTHER_STATION);
01593     }
01594 
01595     if (!st->rect.BeforeAddTile(tile, StationRect::ADD_TEST)) return CMD_ERROR;
01596   } else {
01597     /* allocate and initialize new station */
01598     if (!Station::CanAllocateItem()) return_cmd_error(STR_ERROR_TOO_MANY_STATIONS_LOADING);
01599 
01600     if (flags & DC_EXEC) {
01601       st = new Station(tile);
01602 
01603       st->town = ClosestTownFromTile(tile, UINT_MAX);
01604       st->string_id = GenerateStationName(st, tile, STATIONNAMING_ROAD);
01605 
01606       if (Company::IsValidID(_current_company)) {
01607         SetBit(st->town->have_ratings, _current_company);
01608       }
01609     }
01610   }
01611 
01612   cost.AddCost(_price[type ? PR_BUILD_STATION_TRUCK : PR_BUILD_STATION_BUS]);
01613 
01614   if (flags & DC_EXEC) {
01615     RoadStop *road_stop = new RoadStop(tile);
01616     /* Insert into linked list of RoadStops */
01617     RoadStop **currstop = FindRoadStopSpot(type, st);
01618     *currstop = road_stop;
01619 
01620     if (type) {
01621       st->truck_station.Add(tile);
01622     } else {
01623       st->bus_station.Add(tile);
01624     }
01625 
01626     /* initialize an empty station */
01627     st->AddFacility((type) ? FACIL_TRUCK_STOP : FACIL_BUS_STOP, tile);
01628 
01629     st->rect.BeforeAddTile(tile, StationRect::ADD_TRY);
01630 
01631     RoadStopType rs_type = type ? ROADSTOP_TRUCK : ROADSTOP_BUS;
01632     if (is_drive_through) {
01633       MakeDriveThroughRoadStop(tile, st->owner, road_owner, tram_owner, st->index, rs_type, rts, (Axis)p1);
01634       road_stop->MakeDriveThrough();
01635     } else {
01636       MakeRoadStop(tile, st->owner, st->index, rs_type, rts, (DiagDirection)p1);
01637     }
01638 
01639     st->UpdateVirtCoord();
01640     UpdateStationAcceptance(st, false);
01641     st->RecomputeIndustriesNear();
01642     InvalidateWindowData(WC_SELECT_STATION, 0, 0);
01643     InvalidateWindowData(WC_STATION_LIST, st->owner, 0);
01644     SetWindowWidgetDirty(WC_STATION_VIEW, st->index, SVW_ROADVEHS);
01645   }
01646   return cost;
01647 }
01648 
01649 
01650 static Vehicle *ClearRoadStopStatusEnum(Vehicle *v, void *)
01651 {
01652   if (v->type == VEH_ROAD) {
01653     /* Okay... we are a road vehicle on a drive through road stop.
01654      * But that road stop has just been removed, so we need to make
01655      * sure we are in a valid state... however, vehicles can also
01656      * turn on road stop tiles, so only clear the 'road stop' state
01657      * bits and only when the state was 'in road stop', otherwise
01658      * we'll end up clearing the turn around bits. */
01659     RoadVehicle *rv = RoadVehicle::From(v);
01660     if (HasBit(rv->state, RVS_IN_DT_ROAD_STOP)) rv->state &= RVSB_ROAD_STOP_TRACKDIR_MASK;
01661   }
01662 
01663   return NULL;
01664 }
01665 
01666 
01673 static CommandCost RemoveRoadStop(TileIndex tile, DoCommandFlag flags)
01674 {
01675   Station *st = Station::GetByTile(tile);
01676 
01677   if (_current_company != OWNER_WATER && !CheckOwnership(st->owner)) {
01678     return CMD_ERROR;
01679   }
01680 
01681   bool is_truck = IsTruckStop(tile);
01682 
01683   RoadStop **primary_stop;
01684   RoadStop *cur_stop;
01685   if (is_truck) { // truck stop
01686     primary_stop = &st->truck_stops;
01687     cur_stop = RoadStop::GetByTile(tile, ROADSTOP_TRUCK);
01688   } else {
01689     primary_stop = &st->bus_stops;
01690     cur_stop = RoadStop::GetByTile(tile, ROADSTOP_BUS);
01691   }
01692 
01693   assert(cur_stop != NULL);
01694 
01695   /* don't do the check for drive-through road stops when company bankrupts */
01696   if (IsDriveThroughStopTile(tile) && (flags & DC_BANKRUPT)) {
01697     /* remove the 'going through road stop' status from all vehicles on that tile */
01698     if (flags & DC_EXEC) FindVehicleOnPos(tile, NULL, &ClearRoadStopStatusEnum);
01699   } else {
01700     if (!EnsureNoVehicleOnGround(tile)) return CMD_ERROR;
01701   }
01702 
01703   if (flags & DC_EXEC) {
01704     if (*primary_stop == cur_stop) {
01705       /* removed the first stop in the list */
01706       *primary_stop = cur_stop->next;
01707       /* removed the only stop? */
01708       if (*primary_stop == NULL) {
01709         st->facilities &= (is_truck ? ~FACIL_TRUCK_STOP : ~FACIL_BUS_STOP);
01710       }
01711     } else {
01712       /* tell the predecessor in the list to skip this stop */
01713       RoadStop *pred = *primary_stop;
01714       while (pred->next != cur_stop) pred = pred->next;
01715       pred->next = cur_stop->next;
01716     }
01717 
01718     if (IsDriveThroughStopTile(tile)) {
01719       /* Clears the tile for us */
01720       cur_stop->ClearDriveThrough();
01721     } else {
01722       DoClearSquare(tile);
01723     }
01724 
01725     SetWindowWidgetDirty(WC_STATION_VIEW, st->index, SVW_ROADVEHS);
01726     delete cur_stop;
01727 
01728     /* Make sure no vehicle is going to the old roadstop */
01729     RoadVehicle *v;
01730     FOR_ALL_ROADVEHICLES(v) {
01731       if (v->First() == v && v->current_order.IsType(OT_GOTO_STATION) &&
01732           v->dest_tile == tile) {
01733         v->dest_tile = v->GetOrderStationLocation(st->index);
01734       }
01735     }
01736 
01737     st->rect.AfterRemoveTile(st, tile);
01738 
01739     st->UpdateVirtCoord();
01740     st->RecomputeIndustriesNear();
01741     DeleteStationIfEmpty(st);
01742 
01743     /* Update the tile area of the truck/bus stop */
01744     if (is_truck) {
01745       st->truck_station.Clear();
01746       for (const RoadStop *rs = st->truck_stops; rs != NULL; rs = rs->next) st->truck_station.Add(rs->xy);
01747     } else {
01748       st->bus_station.Clear();
01749       for (const RoadStop *rs = st->bus_stops; rs != NULL; rs = rs->next) st->bus_station.Add(rs->xy);
01750     }
01751   }
01752 
01753   return CommandCost(EXPENSES_CONSTRUCTION, _price[is_truck ? PR_CLEAR_STATION_TRUCK : PR_CLEAR_STATION_BUS]);
01754 }
01755 
01764 CommandCost CmdRemoveRoadStop(TileIndex tile, DoCommandFlag flags, uint32 p1, uint32 p2, const char *text)
01765 {
01766   /* Make sure the specified tile is a road stop of the correct type */
01767   if (!IsTileType(tile, MP_STATION) || !IsRoadStop(tile) || (uint32)GetRoadStopType(tile) != GB(p2, 0, 1)) return CMD_ERROR;
01768 
01769   /* Save the stop info before it is removed */
01770   bool is_drive_through = IsDriveThroughStopTile(tile);
01771   RoadTypes rts = GetRoadTypes(tile);
01772   RoadBits road_bits = IsDriveThroughStopTile(tile) ?
01773       ((GetRoadStopDir(tile) == DIAGDIR_NE) ? ROAD_X : ROAD_Y) :
01774       DiagDirToRoadBits(GetRoadStopDir(tile));
01775 
01776   Owner road_owner = GetRoadOwner(tile, ROADTYPE_ROAD);
01777   Owner tram_owner = GetRoadOwner(tile, ROADTYPE_TRAM);
01778   CommandCost ret = RemoveRoadStop(tile, flags);
01779 
01780   /* If the stop was a drive-through stop replace the road */
01781   if ((flags & DC_EXEC) && ret.Succeeded() && is_drive_through) {
01782     /* Rebuild the drive throuhg road stop. As a road stop can only be
01783      * removed by the owner of the roadstop, _current_company is the
01784      * owner of the road stop. */
01785     MakeRoadNormal(tile, road_bits, rts, ClosestTownFromTile(tile, UINT_MAX)->index,
01786         road_owner, tram_owner);
01787   }
01788 
01789   return ret;
01790 }
01791 
01799 static uint GetMinimalAirportDistanceToTile(const AirportSpec *as, TileIndex town_tile, TileIndex airport_tile)
01800 {
01801   uint ttx = TileX(town_tile); // X, Y of town
01802   uint tty = TileY(town_tile);
01803 
01804   uint atx = TileX(airport_tile); // X, Y of northern airport corner
01805   uint aty = TileY(airport_tile);
01806 
01807   uint btx = TileX(airport_tile) + as->size_x - 1; // X, Y of southern corner
01808   uint bty = TileY(airport_tile) + as->size_y - 1;
01809 
01810   /* if ttx < atx, dx = atx - ttx
01811    * if atx <= ttx <= btx, dx = 0
01812    * else, dx = ttx - btx (similiar for dy) */
01813   uint dx = ttx < atx ? atx - ttx : (ttx <= btx ? 0 : ttx - btx);
01814   uint dy = tty < aty ? aty - tty : (tty <= bty ? 0 : tty - bty);
01815 
01816   return dx + dy;
01817 }
01818 
01827 uint8 GetAirportNoiseLevelForTown(const AirportSpec *as, TileIndex town_tile, TileIndex tile)
01828 {
01829   /* 0 cannot be accounted, and 1 is the lowest that can be reduced from town.
01830    * So no need to go any further*/
01831   if (as->noise_level < 2) return as->noise_level;
01832 
01833   uint distance = GetMinimalAirportDistanceToTile(as, town_tile, tile);
01834 
01835   /* The steps for measuring noise reduction are based on the "magical" (and arbitrary) 8 base distance
01836    * adding the town_council_tolerance 4 times, as a way to graduate, depending of the tolerance.
01837    * Basically, it says that the less tolerant a town is, the bigger the distance before
01838    * an actual decrease can be granted */
01839   uint8 town_tolerance_distance = 8 + (_settings_game.difficulty.town_council_tolerance * 4);
01840 
01841   /* now, we want to have the distance segmented using the distance judged bareable by town
01842    * This will give us the coefficient of reduction the distance provides. */
01843   uint noise_reduction = distance / town_tolerance_distance;
01844 
01845   /* If the noise reduction equals the airport noise itself, don't give it for free.
01846    * Otherwise, simply reduce the airport's level. */
01847   return noise_reduction >= as->noise_level ? 1 : as->noise_level - noise_reduction;
01848 }
01849 
01857 Town *AirportGetNearestTown(const AirportSpec *as, TileIndex airport_tile)
01858 {
01859   Town *t, *nearest = NULL;
01860   uint add = as->size_x + as->size_y - 2; // GetMinimalAirportDistanceToTile can differ from DistanceManhattan by this much
01861   uint mindist = UINT_MAX - add; // prevent overflow
01862   FOR_ALL_TOWNS(t) {
01863     if (DistanceManhattan(t->xy, airport_tile) < mindist + add) { // avoid calling GetMinimalAirportDistanceToTile too often
01864       uint dist = GetMinimalAirportDistanceToTile(as, t->xy, airport_tile);
01865       if (dist < mindist) {
01866         nearest = t;
01867         mindist = dist;
01868       }
01869     }
01870   }
01871 
01872   return nearest;
01873 }
01874 
01875 
01877 void UpdateAirportsNoise()
01878 {
01879   Town *t;
01880   const Station *st;
01881 
01882   FOR_ALL_TOWNS(t) t->noise_reached = 0;
01883 
01884   FOR_ALL_STATIONS(st) {
01885     if (st->airport_tile != INVALID_TILE) {
01886       const AirportSpec *as = st->GetAirportSpec();
01887       Town *nearest = AirportGetNearestTown(as, st->airport_tile);
01888       nearest->noise_reached += GetAirportNoiseLevelForTown(as, nearest->xy, st->airport_tile);
01889     }
01890   }
01891 }
01892 
01903 CommandCost CmdBuildAirport(TileIndex tile, DoCommandFlag flags, uint32 p1, uint32 p2, const char *text)
01904 {
01905   bool airport_upgrade = true;
01906   StationID station_to_join = GB(p2, 16, 16);
01907   bool reuse = (station_to_join != NEW_STATION);
01908   if (!reuse) station_to_join = INVALID_STATION;
01909   bool distant_join = (station_to_join != INVALID_STATION);
01910 
01911   if (distant_join && (!_settings_game.station.distant_join_stations || !Station::IsValidID(station_to_join))) return CMD_ERROR;
01912 
01913   if (p1 >= NUM_AIRPORTS) return CMD_ERROR;
01914 
01915   if (!CheckIfAuthorityAllowsNewStation(tile, flags)) {
01916     return CMD_ERROR;
01917   }
01918 
01919   /* Check if a valid, buildable airport was chosen for construction */
01920   const AirportSpec *as = AirportSpec::Get(p1);
01921   if (!as->IsAvailable()) return CMD_ERROR;
01922 
01923   Town *t = ClosestTownFromTile(tile, UINT_MAX);
01924   int w = as->size_x;
01925   int h = as->size_y;
01926 
01927   if (w > _settings_game.station.station_spread || h > _settings_game.station.station_spread) {
01928     _error_message = STR_ERROR_STATION_TOO_SPREAD_OUT;
01929     return CMD_ERROR;
01930   }
01931 
01932   CommandCost cost = CheckFlatLandBelow(tile, w, h, flags, 0, NULL);
01933   if (cost.Failed()) return cost;
01934 
01935   /* Go get the final noise level, that is base noise minus factor from distance to town center */
01936   Town *nearest = AirportGetNearestTown(as, tile);
01937   uint newnoise_level = GetAirportNoiseLevelForTown(as, nearest->xy, tile);
01938 
01939   /* Check if local auth would allow a new airport */
01940   StringID authority_refuse_message = STR_NULL;
01941 
01942   if (_settings_game.economy.station_noise_level) {
01943     /* do not allow to build a new airport if this raise the town noise over the maximum allowed by town */
01944     if ((nearest->noise_reached + newnoise_level) > nearest->MaxTownNoise()) {
01945       authority_refuse_message = STR_ERROR_LOCAL_AUTHORITY_REFUSES_NOISE;
01946     }
01947   } else {
01948     uint num = 0;
01949     const Station *st;
01950     FOR_ALL_STATIONS(st) {
01951       if (st->town == t && (st->facilities & FACIL_AIRPORT) && st->airport_type != AT_OILRIG) num++;
01952     }
01953     if (num >= 2) {
01954       authority_refuse_message = STR_ERROR_LOCAL_AUTHORITY_REFUSES_AIRPORT;
01955     }
01956   }
01957 
01958   if (authority_refuse_message != STR_NULL) {
01959     SetDParam(0, t->index);
01960     return_cmd_error(authority_refuse_message);
01961   }
01962 
01963   Station *st = NULL;
01964   CommandCost ret = FindJoiningStation(INVALID_STATION, station_to_join, HasBit(p2, 0), TileArea(tile, w, h), &st);
01965   if (ret.Failed()) return ret;
01966 
01967   /* Distant join */
01968   if (st == NULL && distant_join) st = Station::GetIfValid(station_to_join);
01969 
01970   /* Find a deleted station close to us */
01971   if (st == NULL && reuse) st = GetClosestDeletedStation(tile);
01972 
01973   if (st != NULL) {
01974     if (st->owner != _current_company) {
01975       return_cmd_error(STR_ERROR_TOO_CLOSE_TO_ANOTHER_STATION);
01976     }
01977 
01978     if (!st->rect.BeforeAddRect(tile, w, h, StationRect::ADD_TEST)) return CMD_ERROR;
01979 
01980     if (st->airport_tile != INVALID_TILE) {
01981       return_cmd_error(STR_ERROR_TOO_CLOSE_TO_ANOTHER_AIRPORT);
01982     }
01983   } else {
01984     airport_upgrade = false;
01985 
01986     /* allocate and initialize new station */
01987     if (!Station::CanAllocateItem()) return_cmd_error(STR_ERROR_TOO_MANY_STATIONS_LOADING);
01988 
01989     if (flags & DC_EXEC) {
01990       st = new Station(tile);
01991 
01992       st->town = t;
01993       st->string_id = GenerateStationName(st, tile, !(GetAirport(p1)->flags & AirportFTAClass::AIRPLANES) ? STATIONNAMING_HELIPORT : STATIONNAMING_AIRPORT);
01994 
01995       if (Company::IsValidID(_current_company)) {
01996         SetBit(st->town->have_ratings, _current_company);
01997       }
01998     }
01999   }
02000 
02001   cost.AddCost(_price[PR_BUILD_STATION_AIRPORT] * w * h);
02002 
02003   if (flags & DC_EXEC) {
02004     /* Always add the noise, so there will be no need to recalculate when option toggles */
02005     nearest->noise_reached += newnoise_level;
02006 
02007     st->airport_tile = tile;
02008     st->AddFacility(FACIL_AIRPORT, tile);
02009     st->airport_type = (byte)p1;
02010     st->airport_flags = 0;
02011 
02012     st->rect.BeforeAddRect(tile, w, h, StationRect::ADD_TRY);
02013 
02014     /* if airport was demolished while planes were en-route to it, the
02015      * positions can no longer be the same (v->u.air.pos), since different
02016      * airports have different indexes. So update all planes en-route to this
02017      * airport. Only update if
02018      * 1. airport is upgraded
02019      * 2. airport is added to existing station (unfortunately unavoideable)
02020      */
02021     if (airport_upgrade) UpdateAirplanesOnNewStation(st);
02022 
02023     const AirportTileTable *it = as->table[0];
02024     do {
02025       TileIndex cur_tile = tile + ToTileIndexDiff(it->ti);
02026       MakeAirport(cur_tile, st->owner, st->index, it->gfx);
02027     } while ((++it)->ti.x != -0x80);
02028 
02029     st->UpdateVirtCoord();
02030     UpdateStationAcceptance(st, false);
02031     st->RecomputeIndustriesNear();
02032     InvalidateWindowData(WC_SELECT_STATION, 0, 0);
02033     InvalidateWindowData(WC_STATION_LIST, st->owner, 0);
02034     SetWindowWidgetDirty(WC_STATION_VIEW, st->index, SVW_PLANES);
02035 
02036     if (_settings_game.economy.station_noise_level) {
02037       SetWindowDirty(WC_TOWN_VIEW, st->town->index);
02038     }
02039   }
02040 
02041   return cost;
02042 }
02043 
02050 static CommandCost RemoveAirport(TileIndex tile, DoCommandFlag flags)
02051 {
02052   Station *st = Station::GetByTile(tile);
02053 
02054   if (_current_company != OWNER_WATER && !CheckOwnership(st->owner)) {
02055     return CMD_ERROR;
02056   }
02057 
02058   tile = st->airport_tile;
02059 
02060   const AirportSpec *as = st->GetAirportSpec();
02061   int w = as->size_x;
02062   int h = as->size_y;
02063 
02064   CommandCost cost(EXPENSES_CONSTRUCTION);
02065 
02066   const Aircraft *a;
02067   FOR_ALL_AIRCRAFT(a) {
02068     if (!a->IsNormalAircraft()) continue;
02069     if (a->targetairport == st->index && a->state != FLYING) return CMD_ERROR;
02070   }
02071 
02072   TILE_LOOP(tile_cur, w, h, tile) {
02073     if (!EnsureNoVehicleOnGround(tile_cur)) return CMD_ERROR;
02074 
02075     if (!st->TileBelongsToAirport(tile_cur)) continue;
02076 
02077     cost.AddCost(_price[PR_CLEAR_STATION_AIRPORT]);
02078 
02079     if (flags & DC_EXEC) {
02080       DeleteAnimatedTile(tile_cur);
02081       DoClearSquare(tile_cur);
02082     }
02083   }
02084 
02085   if (flags & DC_EXEC) {
02086     for (uint i = 0; i < as->nof_depots; ++i) {
02087       DeleteWindowById(
02088         WC_VEHICLE_DEPOT, st->GetHangarTile(i)
02089       );
02090     }
02091 
02092     /* Go get the final noise level, that is base noise minus factor from distance to town center.
02093      * And as for construction, always remove it, even if the setting is not set, in order to avoid the
02094      * need of recalculation */
02095     Town *nearest = AirportGetNearestTown(as, tile);
02096     nearest->noise_reached -= GetAirportNoiseLevelForTown(as, nearest->xy, tile);
02097 
02098     st->rect.AfterRemoveRect(st, tile, w, h);
02099 
02100     st->airport_tile = INVALID_TILE;
02101     st->facilities &= ~FACIL_AIRPORT;
02102 
02103     SetWindowWidgetDirty(WC_STATION_VIEW, st->index, SVW_PLANES);
02104 
02105     if (_settings_game.economy.station_noise_level) {
02106       SetWindowDirty(WC_TOWN_VIEW, st->town->index);
02107     }
02108 
02109     st->UpdateVirtCoord();
02110     st->RecomputeIndustriesNear();
02111     DeleteStationIfEmpty(st);
02112   }
02113 
02114   return cost;
02115 }
02116 
02123 bool HasStationInUse(StationID station, CompanyID company)
02124 {
02125   const Vehicle *v;
02126   FOR_ALL_VEHICLES(v) {
02127     if (company == INVALID_COMPANY || v->owner == company) {
02128       const Order *order;
02129       FOR_VEHICLE_ORDERS(v, order) {
02130         if ((order->IsType(OT_GOTO_STATION) || order->IsType(OT_GOTO_WAYPOINT)) && order->GetDestination() == station) {
02131           return true;
02132         }
02133       }
02134     }
02135   }
02136   return false;
02137 }
02138 
02139 static const TileIndexDiffC _dock_tileoffs_chkaround[] = {
02140   {-1,  0},
02141   { 0,  0},
02142   { 0,  0},
02143   { 0, -1}
02144 };
02145 static const byte _dock_w_chk[4] = { 2, 1, 2, 1 };
02146 static const byte _dock_h_chk[4] = { 1, 2, 1, 2 };
02147 
02156 CommandCost CmdBuildDock(TileIndex tile, DoCommandFlag flags, uint32 p1, uint32 p2, const char *text)
02157 {
02158   StationID station_to_join = GB(p2, 16, 16);
02159   bool reuse = (station_to_join != NEW_STATION);
02160   if (!reuse) station_to_join = INVALID_STATION;
02161   bool distant_join = (station_to_join != INVALID_STATION);
02162 
02163   if (distant_join && (!_settings_game.station.distant_join_stations || !Station::IsValidID(station_to_join))) return CMD_ERROR;
02164 
02165   DiagDirection direction = GetInclinedSlopeDirection(GetTileSlope(tile, NULL));
02166   if (direction == INVALID_DIAGDIR) return_cmd_error(STR_ERROR_SITE_UNSUITABLE);
02167   direction = ReverseDiagDir(direction);
02168 
02169   /* Docks cannot be placed on rapids */
02170   if (IsWaterTile(tile)) return_cmd_error(STR_ERROR_SITE_UNSUITABLE);
02171 
02172   if (!CheckIfAuthorityAllowsNewStation(tile, flags)) return CMD_ERROR;
02173 
02174   if (MayHaveBridgeAbove(tile) && IsBridgeAbove(tile)) return_cmd_error(STR_ERROR_MUST_DEMOLISH_BRIDGE_FIRST);
02175 
02176   if (DoCommand(tile, 0, 0, flags, CMD_LANDSCAPE_CLEAR).Failed()) return CMD_ERROR;
02177 
02178   TileIndex tile_cur = tile + TileOffsByDiagDir(direction);
02179 
02180   if (!IsTileType(tile_cur, MP_WATER) || GetTileSlope(tile_cur, NULL) != SLOPE_FLAT) {
02181     return_cmd_error(STR_ERROR_SITE_UNSUITABLE);
02182   }
02183 
02184   if (MayHaveBridgeAbove(tile_cur) && IsBridgeAbove(tile_cur)) return_cmd_error(STR_ERROR_MUST_DEMOLISH_BRIDGE_FIRST);
02185 
02186   /* Get the water class of the water tile before it is cleared.*/
02187   WaterClass wc = GetWaterClass(tile_cur);
02188 
02189   if (DoCommand(tile_cur, 0, 0, flags, CMD_LANDSCAPE_CLEAR).Failed()) return CMD_ERROR;
02190 
02191   tile_cur += TileOffsByDiagDir(direction);
02192   if (!IsTileType(tile_cur, MP_WATER) || GetTileSlope(tile_cur, NULL) != SLOPE_FLAT) {
02193     return_cmd_error(STR_ERROR_SITE_UNSUITABLE);
02194   }
02195 
02196   /* middle */
02197   Station *st = NULL;
02198   CommandCost ret = FindJoiningStation(INVALID_STATION, station_to_join, HasBit(p1, 0),
02199       TileArea(tile + ToTileIndexDiff(_dock_tileoffs_chkaround[direction]),
02200           _dock_w_chk[direction], _dock_h_chk[direction]), &st);
02201   if (ret.Failed()) return ret;
02202 
02203   /* Distant join */
02204   if (st == NULL && distant_join) st = Station::GetIfValid(station_to_join);
02205 
02206   /* Find a deleted station close to us */
02207   if (st == NULL && reuse) st = GetClosestDeletedStation(tile);
02208 
02209   if (st != NULL) {
02210     if (st->owner != _current_company) {
02211       return_cmd_error(STR_ERROR_TOO_CLOSE_TO_ANOTHER_STATION);
02212     }
02213 
02214     if (!st->rect.BeforeAddRect(
02215         tile + ToTileIndexDiff(_dock_tileoffs_chkaround[direction]),
02216         _dock_w_chk[direction], _dock_h_chk[direction], StationRect::ADD_TEST)) return CMD_ERROR;
02217 
02218     if (st->dock_tile != INVALID_TILE) return_cmd_error(STR_ERROR_TOO_CLOSE_TO_ANOTHER_DOCK);
02219   } else {
02220     /* allocate and initialize new station */
02221     if (!Station::CanAllocateItem()) return_cmd_error(STR_ERROR_TOO_MANY_STATIONS_LOADING);
02222 
02223     if (flags & DC_EXEC) {
02224       st = new Station(tile);
02225 
02226       st->town = ClosestTownFromTile(tile, UINT_MAX);
02227       st->string_id = GenerateStationName(st, tile, STATIONNAMING_DOCK);
02228 
02229       if (Company::IsValidID(_current_company)) {
02230         SetBit(st->town->have_ratings, _current_company);
02231       }
02232     }
02233   }
02234 
02235   if (flags & DC_EXEC) {
02236     st->dock_tile = tile;
02237     st->AddFacility(FACIL_DOCK, tile);
02238 
02239     st->rect.BeforeAddRect(
02240         tile + ToTileIndexDiff(_dock_tileoffs_chkaround[direction]),
02241         _dock_w_chk[direction], _dock_h_chk[direction], StationRect::ADD_TRY);
02242 
02243     MakeDock(tile, st->owner, st->index, direction, wc);
02244 
02245     st->UpdateVirtCoord();
02246     UpdateStationAcceptance(st, false);
02247     st->RecomputeIndustriesNear();
02248     InvalidateWindowData(WC_SELECT_STATION, 0, 0);
02249     InvalidateWindowData(WC_STATION_LIST, st->owner, 0);
02250     SetWindowWidgetDirty(WC_STATION_VIEW, st->index, SVW_SHIPS);
02251   }
02252 
02253   return CommandCost(EXPENSES_CONSTRUCTION, _price[PR_BUILD_STATION_DOCK]);
02254 }
02255 
02262 static CommandCost RemoveDock(TileIndex tile, DoCommandFlag flags)
02263 {
02264   Station *st = Station::GetByTile(tile);
02265   if (!CheckOwnership(st->owner)) return CMD_ERROR;
02266 
02267   TileIndex tile1 = st->dock_tile;
02268   TileIndex tile2 = tile1 + TileOffsByDiagDir(GetDockDirection(tile1));
02269 
02270   if (!EnsureNoVehicleOnGround(tile1)) return CMD_ERROR;
02271   if (!EnsureNoVehicleOnGround(tile2)) return CMD_ERROR;
02272 
02273   if (flags & DC_EXEC) {
02274     DoClearSquare(tile1);
02275     MakeWaterKeepingClass(tile2, st->owner);
02276 
02277     st->rect.AfterRemoveTile(st, tile1);
02278     st->rect.AfterRemoveTile(st, tile2);
02279 
02280     MarkTileDirtyByTile(tile2);
02281 
02282     st->dock_tile = INVALID_TILE;
02283     st->facilities &= ~FACIL_DOCK;
02284 
02285     SetWindowWidgetDirty(WC_STATION_VIEW, st->index, SVW_SHIPS);
02286     st->UpdateVirtCoord();
02287     st->RecomputeIndustriesNear();
02288     DeleteStationIfEmpty(st);
02289   }
02290 
02291   return CommandCost(EXPENSES_CONSTRUCTION, _price[PR_CLEAR_STATION_DOCK]);
02292 }
02293 
02294 #include "table/station_land.h"
02295 
02296 const DrawTileSprites *GetStationTileLayout(StationType st, byte gfx)
02297 {
02298   return &_station_display_datas[st][gfx];
02299 }
02300 
02301 static void DrawTile_Station(TileInfo *ti)
02302 {
02303   const DrawTileSprites *t = NULL;
02304   RoadTypes roadtypes;
02305   int32 total_offset;
02306   int32 custom_ground_offset;
02307   const RailtypeInfo *rti = NULL;
02308   uint32 relocation = 0;
02309   const BaseStation *st = NULL;
02310   const StationSpec *statspec = NULL;
02311 
02312   if (HasStationRail(ti->tile)) {
02313     rti = GetRailTypeInfo(GetRailType(ti->tile));
02314     roadtypes = ROADTYPES_NONE;
02315     total_offset = rti->total_offset;
02316     custom_ground_offset = rti->custom_ground_offset;
02317 
02318     if (IsCustomStationSpecIndex(ti->tile)) {
02319       /* look for customization */
02320       st = BaseStation::GetByTile(ti->tile);
02321       statspec = st->speclist[GetCustomStationSpecIndex(ti->tile)].spec;
02322 
02323       if (statspec != NULL) {
02324         uint tile = GetStationGfx(ti->tile);
02325 
02326         relocation = GetCustomStationRelocation(statspec, st, ti->tile);
02327 
02328         if (HasBit(statspec->callback_mask, CBM_STATION_SPRITE_LAYOUT)) {
02329           uint16 callback = GetStationCallback(CBID_STATION_SPRITE_LAYOUT, 0, 0, statspec, st, ti->tile);
02330           if (callback != CALLBACK_FAILED) tile = (callback & ~1) + GetRailStationAxis(ti->tile);
02331         }
02332 
02333         /* Ensure the chosen tile layout is valid for this custom station */
02334         if (statspec->renderdata != NULL) {
02335           t = &statspec->renderdata[tile < statspec->tiles ? tile : (uint)GetRailStationAxis(ti->tile)];
02336         }
02337       }
02338     }
02339   } else {
02340     roadtypes = IsRoadStop(ti->tile) ? GetRoadTypes(ti->tile) : ROADTYPES_NONE;
02341     total_offset = 0;
02342     custom_ground_offset = 0;
02343   }
02344 
02345   if (IsAirport(ti->tile)) {
02346     switch (GetStationGfx(ti->tile)) {
02347       case APT_RADAR_GRASS_FENCE_SW:
02348         t = &_station_display_datas_airport_radar_grass_fence_sw[GetStationAnimationFrame(ti->tile)];
02349         break;
02350       case APT_GRASS_FENCE_NE_FLAG:
02351         t = &_station_display_datas_airport_flag_grass_fence_ne[GetStationAnimationFrame(ti->tile)];
02352         break;
02353       case APT_RADAR_FENCE_SW:
02354         t = &_station_display_datas_airport_radar_fence_sw[GetStationAnimationFrame(ti->tile)];
02355         break;
02356       case APT_RADAR_FENCE_NE:
02357         t = &_station_display_datas_airport_radar_fence_ne[GetStationAnimationFrame(ti->tile)];
02358         break;
02359       case APT_GRASS_FENCE_NE_FLAG_2:
02360         t = &_station_display_datas_airport_flag_grass_fence_ne_2[GetStationAnimationFrame(ti->tile)];
02361         break;
02362     }
02363   }
02364 
02365   Owner owner = GetTileOwner(ti->tile);
02366 
02367   PaletteID palette;
02368   if (Company::IsValidID(owner)) {
02369     palette = COMPANY_SPRITE_COLOUR(owner);
02370   } else {
02371     /* Some stations are not owner by a company, namely oil rigs */
02372     palette = PALETTE_TO_GREY;
02373   }
02374 
02375   if (t == NULL || t->seq == NULL) t = &_station_display_datas[GetStationType(ti->tile)][GetStationGfx(ti->tile)];
02376 
02377   /* don't show foundation for docks */
02378   if (ti->tileh != SLOPE_FLAT && !IsDock(ti->tile)) {
02379     if (statspec != NULL && HasBit(statspec->flags, SSF_CUSTOM_FOUNDATIONS)) {
02380       /* Station has custom foundations. */
02381       SpriteID image = GetCustomStationFoundationRelocation(statspec, st, ti->tile);
02382 
02383       if (HasBit(statspec->flags, SSF_EXTENDED_FOUNDATIONS)) {
02384         /* Station provides extended foundations. */
02385 
02386         static const uint8 foundation_parts[] = {
02387           0, 0, 0, 0, // Invalid,  Invalid,   Invalid,   SLOPE_SW
02388           0, 1, 2, 3, // Invalid,  SLOPE_EW,  SLOPE_SE,  SLOPE_WSE
02389           0, 4, 5, 6, // Invalid,  SLOPE_NW,  SLOPE_NS,  SLOPE_NWS
02390           7, 8, 9     // SLOPE_NE, SLOPE_ENW, SLOPE_SEN
02391         };
02392 
02393         AddSortableSpriteToDraw(image + foundation_parts[ti->tileh], PAL_NONE, ti->x, ti->y, 16, 16, 7, ti->z);
02394       } else {
02395         /* Draw simple foundations, built up from 8 possible foundation sprites. */
02396 
02397         /* Each set bit represents one of the eight composite sprites to be drawn.
02398          * 'Invalid' entries will not drawn but are included for completeness. */
02399         static const uint8 composite_foundation_parts[] = {
02400           /* Invalid  (00000000), Invalid   (11010001), Invalid   (11100100), SLOPE_SW  (11100000) */
02401              0x00,                0xD1,                 0xE4,                 0xE0,
02402           /* Invalid  (11001010), SLOPE_EW  (11001001), SLOPE_SE  (11000100), SLOPE_WSE (11000000) */
02403              0xCA,                0xC9,                 0xC4,                 0xC0,
02404           /* Invalid  (11010010), SLOPE_NW  (10010001), SLOPE_NS  (11100100), SLOPE_NWS (10100000) */
02405              0xD2,                0x91,                 0xE4,                 0xA0,
02406           /* SLOPE_NE (01001010), SLOPE_ENW (00001001), SLOPE_SEN (01000100) */
02407              0x4A,                0x09,                 0x44
02408         };
02409 
02410         uint8 parts = composite_foundation_parts[ti->tileh];
02411 
02412         /* If foundations continue beyond the tile's upper sides then
02413          * mask out the last two pieces. */
02414         uint z;
02415         Slope slope = GetFoundationSlope(ti->tile, &z);
02416         if (!HasFoundationNW(ti->tile, slope, z)) ClrBit(parts, 6);
02417         if (!HasFoundationNE(ti->tile, slope, z)) ClrBit(parts, 7);
02418 
02419         StartSpriteCombine();
02420         for (int i = 0; i < 8; i++) {
02421           if (HasBit(parts, i)) {
02422             AddSortableSpriteToDraw(image + i, PAL_NONE, ti->x, ti->y, 16, 16, 7, ti->z);
02423           }
02424         }
02425         EndSpriteCombine();
02426       }
02427 
02428       OffsetGroundSprite(31, 1);
02429       ti->z += ApplyFoundationToSlope(FOUNDATION_LEVELED, &ti->tileh);
02430     } else {
02431       DrawFoundation(ti, FOUNDATION_LEVELED);
02432     }
02433   }
02434 
02435   if (IsBuoy(ti->tile) || IsDock(ti->tile) || (IsOilRig(ti->tile) && GetWaterClass(ti->tile) != WATER_CLASS_INVALID)) {
02436     if (ti->tileh == SLOPE_FLAT) {
02437       DrawWaterClassGround(ti);
02438     } else {
02439       assert(IsDock(ti->tile));
02440       TileIndex water_tile = ti->tile + TileOffsByDiagDir(GetDockDirection(ti->tile));
02441       WaterClass wc = GetWaterClass(water_tile);
02442       if (wc == WATER_CLASS_SEA) {
02443         DrawShoreTile(ti->tileh);
02444       } else {
02445         DrawClearLandTile(ti, 3);
02446       }
02447     }
02448   } else {
02449     SpriteID image = t->ground.sprite;
02450     PaletteID pal  = t->ground.pal;
02451     if (rti != NULL && rti->UsesOverlay() && (image == SPR_RAIL_TRACK_X || image == SPR_RAIL_TRACK_Y)) {
02452       SpriteID ground = GetCustomRailSprite(rti, ti->tile, RTSG_GROUND);
02453       DrawGroundSprite(SPR_FLAT_GRASS_TILE, PAL_NONE);
02454       DrawGroundSprite(ground + (image == SPR_RAIL_TRACK_X ? RTO_X : RTO_Y), PAL_NONE);
02455 
02456       if (_game_mode != GM_MENU && _settings_client.gui.show_track_reservation && HasStationReservation(ti->tile)) {
02457         SpriteID overlay = GetCustomRailSprite(rti, ti->tile, RTSG_OVERLAY);
02458         DrawGroundSprite(overlay + (image == SPR_RAIL_TRACK_X ? RTO_X : RTO_Y), PALETTE_CRASH);
02459       }
02460     } else {
02461       if (HasBit(image, SPRITE_MODIFIER_CUSTOM_SPRITE)) {
02462         image += GetCustomStationGroundRelocation(statspec, st, ti->tile);
02463         image += custom_ground_offset;
02464       } else {
02465         image += total_offset;
02466       }
02467       DrawGroundSprite(image, GroundSpritePaletteTransform(image, pal, palette));
02468 
02469       /* PBS debugging, draw reserved tracks darker */
02470       if (_game_mode != GM_MENU && _settings_client.gui.show_track_reservation && HasStationRail(ti->tile) && HasStationReservation(ti->tile)) {
02471         const RailtypeInfo *rti = GetRailTypeInfo(GetRailType(ti->tile));
02472         DrawGroundSprite(GetRailStationAxis(ti->tile) == AXIS_X ? rti->base_sprites.single_x : rti->base_sprites.single_y, PALETTE_CRASH);
02473       }
02474     }
02475   }
02476 
02477   if (HasStationRail(ti->tile) && HasCatenaryDrawn(GetRailType(ti->tile)) && IsStationTileElectrifiable(ti->tile)) DrawCatenary(ti);
02478 
02479   if (HasBit(roadtypes, ROADTYPE_TRAM)) {
02480     Axis axis = GetRoadStopDir(ti->tile) == DIAGDIR_NE ? AXIS_X : AXIS_Y;
02481     DrawGroundSprite((HasBit(roadtypes, ROADTYPE_ROAD) ? SPR_TRAMWAY_OVERLAY : SPR_TRAMWAY_TRAM) + (axis ^ 1), PAL_NONE);
02482     DrawTramCatenary(ti, axis == AXIS_X ? ROAD_X : ROAD_Y);
02483   }
02484 
02485   if (IsRailWaypoint(ti->tile)) {
02486     /* Don't offset the waypoint graphics; they're always the same. */
02487     total_offset = 0;
02488   }
02489 
02490   DrawRailTileSeq(ti, t, TO_BUILDINGS, total_offset, relocation, palette);
02491 }
02492 
02493 void StationPickerDrawSprite(int x, int y, StationType st, RailType railtype, RoadType roadtype, int image)
02494 {
02495   int32 total_offset = 0;
02496   PaletteID pal = COMPANY_SPRITE_COLOUR(_local_company);
02497   const DrawTileSprites *t = &_station_display_datas[st][image];
02498   const RailtypeInfo *rti = NULL;
02499 
02500   if (railtype != INVALID_RAILTYPE) {
02501     rti = GetRailTypeInfo(railtype);
02502     total_offset = rti->total_offset;
02503   }
02504 
02505   SpriteID img = t->ground.sprite;
02506   if ((img == SPR_RAIL_TRACK_X || img == SPR_RAIL_TRACK_Y) && rti->UsesOverlay()) {
02507     SpriteID ground = GetCustomRailSprite(rti, INVALID_TILE, RTSG_GROUND);
02508     DrawSprite(SPR_FLAT_GRASS_TILE, PAL_NONE, x, y);
02509     DrawSprite(ground + (img == SPR_RAIL_TRACK_X ? RTO_X : RTO_Y), PAL_NONE, x, y);
02510   } else {
02511     DrawSprite(img + total_offset, HasBit(img, PALETTE_MODIFIER_COLOUR) ? pal : PAL_NONE, x, y);
02512   }
02513 
02514   if (roadtype == ROADTYPE_TRAM) {
02515     DrawSprite(SPR_TRAMWAY_TRAM + (t->ground.sprite == SPR_ROAD_PAVED_STRAIGHT_X ? 1 : 0), PAL_NONE, x, y);
02516   }
02517 
02518   /* Default waypoint has no railtype specific sprites */
02519   DrawRailTileSeqInGUI(x, y, t, st == STATION_WAYPOINT ? 0 : total_offset, 0, pal);
02520 }
02521 
02522 static uint GetSlopeZ_Station(TileIndex tile, uint x, uint y)
02523 {
02524   return GetTileMaxZ(tile);
02525 }
02526 
02527 static Foundation GetFoundation_Station(TileIndex tile, Slope tileh)
02528 {
02529   return FlatteningFoundation(tileh);
02530 }
02531 
02532 static void GetTileDesc_Station(TileIndex tile, TileDesc *td)
02533 {
02534   td->owner[0] = GetTileOwner(tile);
02535   if (IsDriveThroughStopTile(tile)) {
02536     Owner road_owner = INVALID_OWNER;
02537     Owner tram_owner = INVALID_OWNER;
02538     RoadTypes rts = GetRoadTypes(tile);
02539     if (HasBit(rts, ROADTYPE_ROAD)) road_owner = GetRoadOwner(tile, ROADTYPE_ROAD);
02540     if (HasBit(rts, ROADTYPE_TRAM)) tram_owner = GetRoadOwner(tile, ROADTYPE_TRAM);
02541 
02542     /* Is there a mix of owners? */
02543     if ((tram_owner != INVALID_OWNER && tram_owner != td->owner[0]) ||
02544         (road_owner != INVALID_OWNER && road_owner != td->owner[0])) {
02545       uint i = 1;
02546       if (road_owner != INVALID_OWNER) {
02547         td->owner_type[i] = STR_LAND_AREA_INFORMATION_ROAD_OWNER;
02548         td->owner[i] = road_owner;
02549         i++;
02550       }
02551       if (tram_owner != INVALID_OWNER) {
02552         td->owner_type[i] = STR_LAND_AREA_INFORMATION_TRAM_OWNER;
02553         td->owner[i] = tram_owner;
02554       }
02555     }
02556   }
02557   td->build_date = BaseStation::GetByTile(tile)->build_date;
02558 
02559   if (HasStationTileRail(tile)) {
02560     const StationSpec *spec = GetStationSpec(tile);
02561 
02562     if (spec != NULL) {
02563       td->station_class = GetStationClassName(spec->sclass);
02564       td->station_name  = spec->name;
02565 
02566       if (spec->grffile != NULL) {
02567         const GRFConfig *gc = GetGRFConfig(spec->grffile->grfid);
02568         td->grf = gc->name;
02569       }
02570     }
02571   }
02572 
02573   StringID str;
02574   switch (GetStationType(tile)) {
02575     default: NOT_REACHED();
02576     case STATION_RAIL:     str = STR_LAI_STATION_DESCRIPTION_RAILROAD_STATION; break;
02577     case STATION_AIRPORT:
02578       str = (IsHangar(tile) ? STR_LAI_STATION_DESCRIPTION_AIRCRAFT_HANGAR : STR_LAI_STATION_DESCRIPTION_AIRPORT);
02579       break;
02580     case STATION_TRUCK:    str = STR_LAI_STATION_DESCRIPTION_TRUCK_LOADING_AREA; break;
02581     case STATION_BUS:      str = STR_LAI_STATION_DESCRIPTION_BUS_STATION; break;
02582     case STATION_OILRIG:   str = STR_INDUSTRY_NAME_OIL_RIG; break;
02583     case STATION_DOCK:     str = STR_LAI_STATION_DESCRIPTION_SHIP_DOCK; break;
02584     case STATION_BUOY:     str = STR_LAI_STATION_DESCRIPTION_BUOY; break;
02585     case STATION_WAYPOINT: str = STR_LAI_STATION_DESCRIPTION_WAYPOINT; break;
02586   }
02587   td->str = str;
02588 }
02589 
02590 
02591 static TrackStatus GetTileTrackStatus_Station(TileIndex tile, TransportType mode, uint sub_mode, DiagDirection side)
02592 {
02593   TrackBits trackbits = TRACK_BIT_NONE;
02594 
02595   switch (mode) {
02596     case TRANSPORT_RAIL:
02597       if (HasStationRail(tile) && !IsStationTileBlocked(tile)) {
02598         trackbits = TrackToTrackBits(GetRailStationTrack(tile));
02599       }
02600       break;
02601 
02602     case TRANSPORT_WATER:
02603       /* buoy is coded as a station, it is always on open water */
02604       if (IsBuoy(tile)) {
02605         trackbits = TRACK_BIT_ALL;
02606         /* remove tracks that connect NE map edge */
02607         if (TileX(tile) == 0) trackbits &= ~(TRACK_BIT_X | TRACK_BIT_UPPER | TRACK_BIT_RIGHT);
02608         /* remove tracks that connect NW map edge */
02609         if (TileY(tile) == 0) trackbits &= ~(TRACK_BIT_Y | TRACK_BIT_LEFT | TRACK_BIT_UPPER);
02610       }
02611       break;
02612 
02613     case TRANSPORT_ROAD:
02614       if ((GetRoadTypes(tile) & sub_mode) != 0 && IsRoadStop(tile)) {
02615         DiagDirection dir = GetRoadStopDir(tile);
02616         Axis axis = DiagDirToAxis(dir);
02617 
02618         if (side != INVALID_DIAGDIR) {
02619           if (axis != DiagDirToAxis(side) || (IsStandardRoadStopTile(tile) && dir != side)) break;
02620         }
02621 
02622         trackbits = AxisToTrackBits(axis);
02623       }
02624       break;
02625 
02626     default:
02627       break;
02628   }
02629 
02630   return CombineTrackStatus(TrackBitsToTrackdirBits(trackbits), TRACKDIR_BIT_NONE);
02631 }
02632 
02633 
02634 static void TileLoop_Station(TileIndex tile)
02635 {
02636   /* FIXME -- GetTileTrackStatus_Station -> animated stationtiles
02637    * hardcoded.....not good */
02638   switch (GetStationType(tile)) {
02639     case STATION_AIRPORT:
02640       if (AirportTileSpec::Get(GetStationGfx(tile))->animation_info != 0xFFFF) {
02641         AddAnimatedTile(tile);
02642       }
02643       break;
02644 
02645     case STATION_DOCK:
02646       if (GetTileSlope(tile, NULL) != SLOPE_FLAT) break; // only handle water part
02647     /* FALL THROUGH */
02648     case STATION_OILRIG: //(station part)
02649     case STATION_BUOY:
02650       TileLoop_Water(tile);
02651       break;
02652 
02653     default: break;
02654   }
02655 }
02656 
02657 
02658 static void AnimateTile_Station(TileIndex tile)
02659 {
02660   if (HasStationRail(tile)) {
02661     AnimateStationTile(tile);
02662     return;
02663   }
02664 
02665   if (IsAirport(tile)) {
02666     const AirportTileSpec *ats = AirportTileSpec::Get(GetStationGfx(tile));
02667     uint16 mask = (1 << ats->animation_speed) - 1;
02668     if (ats->animation_info != 0xFFFF && (_tick_counter & mask) == 0) {
02669       uint8 next_frame = GetStationAnimationFrame(tile) + 1;
02670       if (next_frame >= GB(ats->animation_info, 0, 8)) next_frame = 0;
02671       SetStationAnimationFrame(tile, next_frame);
02672       MarkTileDirtyByTile(tile);
02673     }
02674   }
02675 }
02676 
02677 
02678 static bool ClickTile_Station(TileIndex tile)
02679 {
02680   const BaseStation *st = BaseStation::GetByTile(tile);
02681 
02682   if (st->facilities & FACIL_WAYPOINT) {
02683     ShowWaypointWindow(Waypoint::From(st));
02684   } else if (IsHangar(tile)) {
02685     ShowDepotWindow(tile, VEH_AIRCRAFT);
02686   } else {
02687     ShowStationViewWindow(st->index);
02688   }
02689   return true;
02690 }
02691 
02692 static VehicleEnterTileStatus VehicleEnter_Station(Vehicle *v, TileIndex tile, int x, int y)
02693 {
02694   if (v->type == VEH_TRAIN) {
02695     StationID station_id = GetStationIndex(tile);
02696     if (!v->current_order.ShouldStopAtStation(v, station_id)) return VETSB_CONTINUE;
02697     if (!IsRailStation(tile) || !Train::From(v)->IsFrontEngine()) return VETSB_CONTINUE;
02698 
02699     int station_ahead;
02700     int station_length;
02701     int stop = GetTrainStopLocation(station_id, tile, Train::From(v), &station_ahead, &station_length);
02702 
02703     /* Stop whenever that amount of station ahead + the distance from the
02704      * begin of the platform to the stop location is longer than the length
02705      * of the platform. Station ahead 'includes' the current tile where the
02706      * vehicle is on, so we need to substract that. */
02707     if (!IsInsideBS(stop + station_ahead, station_length, TILE_SIZE)) return VETSB_CONTINUE;
02708 
02709     DiagDirection dir = DirToDiagDir(v->direction);
02710 
02711     x &= 0xF;
02712     y &= 0xF;
02713 
02714     if (DiagDirToAxis(dir) != AXIS_X) Swap(x, y);
02715     if (y == TILE_SIZE / 2) {
02716       if (dir != DIAGDIR_SE && dir != DIAGDIR_SW) x = TILE_SIZE - 1 - x;
02717       stop &= TILE_SIZE - 1;
02718 
02719       if (x == stop) return VETSB_ENTERED_STATION | (VehicleEnterTileStatus)(station_id << VETS_STATION_ID_OFFSET); // enter station
02720       if (x < stop) {
02721         uint16 spd;
02722 
02723         v->vehstatus |= VS_TRAIN_SLOWING;
02724         spd = max(0, (stop - x) * 20 - 15);
02725         if (spd < v->cur_speed) v->cur_speed = spd;
02726       }
02727     }
02728   } else if (v->type == VEH_ROAD) {
02729     RoadVehicle *rv = RoadVehicle::From(v);
02730     if (rv->state < RVSB_IN_ROAD_STOP && !IsReversingRoadTrackdir((Trackdir)rv->state) && rv->frame == 0) {
02731       if (IsRoadStop(tile) && rv->IsRoadVehFront()) {
02732         /* Attempt to allocate a parking bay in a road stop */
02733         return RoadStop::GetByTile(tile, GetRoadStopType(tile))->Enter(rv) ? VETSB_CONTINUE : VETSB_CANNOT_ENTER;
02734       }
02735     }
02736   }
02737 
02738   return VETSB_CONTINUE;
02739 }
02740 
02747 static bool StationHandleBigTick(BaseStation *st)
02748 {
02749   if (!st->IsInUse() && ++st->delete_ctr >= 8) {
02750     delete st;
02751     return false;
02752   }
02753 
02754   if ((st->facilities & FACIL_WAYPOINT) == 0) UpdateStationAcceptance(Station::From(st), true);
02755 
02756   return true;
02757 }
02758 
02759 static inline void byte_inc_sat(byte *p)
02760 {
02761   byte b = *p + 1;
02762   if (b != 0) *p = b;
02763 }
02764 
02765 static void UpdateStationRating(Station *st)
02766 {
02767   bool waiting_changed = false;
02768 
02769   byte_inc_sat(&st->time_since_load);
02770   byte_inc_sat(&st->time_since_unload);
02771 
02772   const CargoSpec *cs;
02773   FOR_ALL_CARGOSPECS(cs) {
02774     GoodsEntry *ge = &st->goods[cs->Index()];
02775     /* Slowly increase the rating back to his original level in the case we
02776      *  didn't deliver cargo yet to this station. This happens when a bribe
02777      *  failed while you didn't moved that cargo yet to a station. */
02778     if (!HasBit(ge->acceptance_pickup, GoodsEntry::PICKUP) && ge->rating < INITIAL_STATION_RATING) {
02779       ge->rating++;
02780     }
02781 
02782     /* Only change the rating if we are moving this cargo */
02783     if (HasBit(ge->acceptance_pickup, GoodsEntry::PICKUP)) {
02784       byte_inc_sat(&ge->days_since_pickup);
02785 
02786       bool skip = false;
02787       int rating = 0;
02788       uint waiting = ge->cargo.Count();
02789 
02790       if (HasBit(cs->callback_mask, CBM_CARGO_STATION_RATING_CALC)) {
02791         /* Perform custom station rating. If it succeeds the speed, days in transit and
02792          * waiting cargo ratings must not be executed. */
02793 
02794         /* NewGRFs expect last speed to be 0xFF when no vehicle has arrived yet. */
02795         uint last_speed = ge->last_speed;
02796         if (last_speed == 0) last_speed = 0xFF;
02797 
02798         uint32 var18 = min(ge->days_since_pickup, 0xFF) | (min(waiting, 0xFFFF) << 8) | (min(last_speed, 0xFF) << 24);
02799         /* Convert to the 'old' vehicle types */
02800         uint32 var10 = (st->last_vehicle_type == VEH_INVALID) ? 0x0 : (st->last_vehicle_type + 0x10);
02801         uint16 callback = GetCargoCallback(CBID_CARGO_STATION_RATING_CALC, var10, var18, cs);
02802         if (callback != CALLBACK_FAILED) {
02803           skip = true;
02804           rating = GB(callback, 0, 14);
02805 
02806           /* Simulate a 15 bit signed value */
02807           if (HasBit(callback, 14)) rating -= 0x4000;
02808         }
02809       }
02810 
02811       if (!skip) {
02812         int b = ge->last_speed - 85;
02813         if (b >= 0) rating += b >> 2;
02814 
02815         byte days = ge->days_since_pickup;
02816         if (st->last_vehicle_type == VEH_SHIP) days >>= 2;
02817         (days > 21) ||
02818         (rating += 25, days > 12) ||
02819         (rating += 25, days > 6) ||
02820         (rating += 45, days > 3) ||
02821         (rating += 35, true);
02822 
02823         (rating -= 90, waiting > 1500) ||
02824         (rating += 55, waiting > 1000) ||
02825         (rating += 35, waiting > 600) ||
02826         (rating += 10, waiting > 300) ||
02827         (rating += 20, waiting > 100) ||
02828         (rating += 10, true);
02829       }
02830 
02831       if (Company::IsValidID(st->owner) && HasBit(st->town->statues, st->owner)) rating += 26;
02832 
02833       byte age = ge->last_age;
02834       (age >= 3) ||
02835       (rating += 10, age >= 2) ||
02836       (rating += 10, age >= 1) ||
02837       (rating += 13, true);
02838 
02839       {
02840         int or_ = ge->rating; // old rating
02841 
02842         /* only modify rating in steps of -2, -1, 0, 1 or 2 */
02843         ge->rating = rating = or_ + Clamp(Clamp(rating, 0, 255) - or_, -2, 2);
02844 
02845         /* if rating is <= 64 and more than 200 items waiting,
02846          * remove some random amount of goods from the station */
02847         if (rating <= 64 && waiting >= 200) {
02848           int dec = Random() & 0x1F;
02849           if (waiting < 400) dec &= 7;
02850           waiting -= dec + 1;
02851           waiting_changed = true;
02852         }
02853 
02854         /* if rating is <= 127 and there are any items waiting, maybe remove some goods. */
02855         if (rating <= 127 && waiting != 0) {
02856           uint32 r = Random();
02857           if (rating <= (int)GB(r, 0, 7)) {
02858             /* Need to have int, otherwise it will just overflow etc. */
02859             waiting = max((int)waiting - (int)GB(r, 8, 2) - 1, 0);
02860             waiting_changed = true;
02861           }
02862         }
02863 
02864         /* At some point we really must cap the cargo. Previously this
02865          * was a strict 4095, but now we'll have a less strict, but
02866          * increasingly agressive truncation of the amount of cargo. */
02867         static const uint WAITING_CARGO_THRESHOLD  = 1 << 12;
02868         static const uint WAITING_CARGO_CUT_FACTOR = 1 <<  6;
02869         static const uint MAX_WAITING_CARGO        = 1 << 15;
02870 
02871         if (waiting > WAITING_CARGO_THRESHOLD) {
02872           uint difference = waiting - WAITING_CARGO_THRESHOLD;
02873           waiting -= (difference / WAITING_CARGO_CUT_FACTOR);
02874 
02875           waiting = min(waiting, MAX_WAITING_CARGO);
02876           waiting_changed = true;
02877         }
02878 
02879         if (waiting_changed) ge->cargo.Truncate(waiting);
02880       }
02881     }
02882   }
02883 
02884   StationID index = st->index;
02885   if (waiting_changed) {
02886     SetWindowDirty(WC_STATION_VIEW, index); // update whole window
02887   } else {
02888     SetWindowWidgetDirty(WC_STATION_VIEW, index, SVW_RATINGLIST); // update only ratings list
02889   }
02890 }
02891 
02892 /* called for every station each tick */
02893 static void StationHandleSmallTick(BaseStation *st)
02894 {
02895   if ((st->facilities & FACIL_WAYPOINT) != 0 || !st->IsInUse()) return;
02896 
02897   byte b = st->delete_ctr + 1;
02898   if (b >= 185) b = 0;
02899   st->delete_ctr = b;
02900 
02901   if (b == 0) UpdateStationRating(Station::From(st));
02902 }
02903 
02904 void OnTick_Station()
02905 {
02906   if (_game_mode == GM_EDITOR) return;
02907 
02908   BaseStation *st;
02909   FOR_ALL_BASE_STATIONS(st) {
02910     StationHandleSmallTick(st);
02911 
02912     /* Run 250 tick interval trigger for station animation.
02913      * Station index is included so that triggers are not all done
02914      * at the same time. */
02915     if ((_tick_counter + st->index) % 250 == 0) {
02916       /* Stop processing this station if it was deleted */
02917       if (!StationHandleBigTick(st)) continue;
02918       StationAnimationTrigger(st, st->xy, STAT_ANIM_250_TICKS);
02919     }
02920   }
02921 }
02922 
02923 void StationMonthlyLoop()
02924 {
02925   /* not used */
02926 }
02927 
02928 
02929 void ModifyStationRatingAround(TileIndex tile, Owner owner, int amount, uint radius)
02930 {
02931   Station *st;
02932 
02933   FOR_ALL_STATIONS(st) {
02934     if (st->owner == owner &&
02935         DistanceManhattan(tile, st->xy) <= radius) {
02936       for (CargoID i = 0; i < NUM_CARGO; i++) {
02937         GoodsEntry *ge = &st->goods[i];
02938 
02939         if (ge->acceptance_pickup != 0) {
02940           ge->rating = Clamp(ge->rating + amount, 0, 255);
02941         }
02942       }
02943     }
02944   }
02945 }
02946 
02947 static void UpdateStationWaiting(Station *st, CargoID type, uint amount, SourceType source_type, SourceID source_id)
02948 {
02949   st->goods[type].cargo.Append(new CargoPacket(st->index, st->xy, amount, source_type, source_id));
02950   SetBit(st->goods[type].acceptance_pickup, GoodsEntry::PICKUP);
02951 
02952   StationAnimationTrigger(st, st->xy, STAT_ANIM_NEW_CARGO, type);
02953 
02954   SetWindowDirty(WC_STATION_VIEW, st->index);
02955   st->MarkTilesDirty(true);
02956 }
02957 
02958 static bool IsUniqueStationName(const char *name)
02959 {
02960   const Station *st;
02961 
02962   FOR_ALL_STATIONS(st) {
02963     if (st->name != NULL && strcmp(st->name, name) == 0) return false;
02964   }
02965 
02966   return true;
02967 }
02968 
02977 CommandCost CmdRenameStation(TileIndex tile, DoCommandFlag flags, uint32 p1, uint32 p2, const char *text)
02978 {
02979   Station *st = Station::GetIfValid(p1);
02980   if (st == NULL || !CheckOwnership(st->owner)) return CMD_ERROR;
02981 
02982   bool reset = StrEmpty(text);
02983 
02984   if (!reset) {
02985     if (strlen(text) >= MAX_LENGTH_STATION_NAME_BYTES) return CMD_ERROR;
02986     if (!IsUniqueStationName(text)) return_cmd_error(STR_ERROR_NAME_MUST_BE_UNIQUE);
02987   }
02988 
02989   if (flags & DC_EXEC) {
02990     free(st->name);
02991     st->name = reset ? NULL : strdup(text);
02992 
02993     st->UpdateVirtCoord();
02994     InvalidateWindowData(WC_STATION_LIST, st->owner, 1);
02995   }
02996 
02997   return CommandCost();
02998 }
02999 
03006 void FindStationsAroundTiles(const TileArea &location, StationList *stations)
03007 {
03008   /* area to search = producer plus station catchment radius */
03009   int max_rad = (_settings_game.station.modified_catchment ? MAX_CATCHMENT : CA_UNMODIFIED);
03010 
03011   for (int dy = -max_rad; dy < location.h + max_rad; dy++) {
03012     for (int dx = -max_rad; dx < location.w + max_rad; dx++) {
03013       TileIndex cur_tile = TileAddWrap(location.tile, dx, dy);
03014       if (cur_tile == INVALID_TILE || !IsTileType(cur_tile, MP_STATION)) continue;
03015 
03016       Station *st = Station::GetByTile(cur_tile);
03017       if (st == NULL) continue;
03018 
03019       if (_settings_game.station.modified_catchment) {
03020         int rad = st->GetCatchmentRadius();
03021         if (dx < -rad || dx >= rad + location.w || dy < -rad || dy >= rad + location.h) continue;
03022       }
03023 
03024       /* Insert the station in the set. This will fail if it has
03025        * already been added.
03026        */
03027       stations->Include(st);
03028     }
03029   }
03030 }
03031 
03036 const StationList *StationFinder::GetStations()
03037 {
03038   if (this->tile != INVALID_TILE) {
03039     FindStationsAroundTiles(*this, &this->stations);
03040     this->tile = INVALID_TILE;
03041   }
03042   return &this->stations;
03043 }
03044 
03045 uint MoveGoodsToStation(CargoID type, uint amount, SourceType source_type, SourceID source_id, const StationList *all_stations)
03046 {
03047   /* Return if nothing to do. Also the rounding below fails for 0. */
03048   if (amount == 0) return 0;
03049 
03050   Station *st1 = NULL;   // Station with best rating
03051   Station *st2 = NULL;   // Second best station
03052   uint best_rating1 = 0; // rating of st1
03053   uint best_rating2 = 0; // rating of st2
03054 
03055   for (Station * const *st_iter = all_stations->Begin(); st_iter != all_stations->End(); ++st_iter) {
03056     Station *st = *st_iter;
03057 
03058     /* Is the station reserved exclusively for somebody else? */
03059     if (st->town->exclusive_counter > 0 && st->town->exclusivity != st->owner) continue;
03060 
03061     if (st->goods[type].rating == 0) continue; // Lowest possible rating, better not to give cargo anymore
03062 
03063     if (_settings_game.order.selectgoods && st->goods[type].last_speed == 0) continue; // Selectively servicing stations, and not this one
03064 
03065     if (IsCargoInClass(type, CC_PASSENGERS)) {
03066       if (st->facilities == FACIL_TRUCK_STOP) continue; // passengers are never served by just a truck stop
03067     } else {
03068       if (st->facilities == FACIL_BUS_STOP) continue; // non-passengers are never served by just a bus stop
03069     }
03070 
03071     /* This station can be used, add it to st1/st2 */
03072     if (st1 == NULL || st->goods[type].rating >= best_rating1) {
03073       st2 = st1; best_rating2 = best_rating1; st1 = st; best_rating1 = st->goods[type].rating;
03074     } else if (st2 == NULL || st->goods[type].rating >= best_rating2) {
03075       st2 = st; best_rating2 = st->goods[type].rating;
03076     }
03077   }
03078 
03079   /* no stations around at all? */
03080   if (st1 == NULL) return 0;
03081 
03082   if (st2 == NULL) {
03083     /* only one station around */
03084     uint moved = amount * best_rating1 / 256 + 1;
03085     UpdateStationWaiting(st1, type, moved, source_type, source_id);
03086     return moved;
03087   }
03088 
03089   /* several stations around, the best two (highest rating) are in st1 and st2 */
03090   assert(st1 != NULL);
03091   assert(st2 != NULL);
03092   assert(best_rating1 != 0 || best_rating2 != 0);
03093 
03094   /* the 2nd highest one gets a penalty */
03095   best_rating2 >>= 1;
03096 
03097   /* amount given to station 1 */
03098   uint t = (best_rating1 * (amount + 1)) / (best_rating1 + best_rating2);
03099 
03100   uint moved = 0;
03101   if (t != 0) {
03102     moved = t * best_rating1 / 256 + 1;
03103     amount -= t;
03104     UpdateStationWaiting(st1, type, moved, source_type, source_id);
03105   }
03106 
03107   if (amount != 0) {
03108     amount = amount * best_rating2 / 256 + 1;
03109     moved += amount;
03110     UpdateStationWaiting(st2, type, amount, source_type, source_id);
03111   }
03112 
03113   return moved;
03114 }
03115 
03116 void BuildOilRig(TileIndex tile)
03117 {
03118   if (!Station::CanAllocateItem()) {
03119     DEBUG(misc, 0, "Can't allocate station for oilrig at 0x%X, reverting to oilrig only", tile);
03120     return;
03121   }
03122 
03123   Station *st = new Station(tile);
03124   st->town = ClosestTownFromTile(tile, UINT_MAX);
03125 
03126   st->string_id = GenerateStationName(st, tile, STATIONNAMING_OILRIG);
03127 
03128   assert(IsTileType(tile, MP_INDUSTRY));
03129   DeleteAnimatedTile(tile);
03130   MakeOilrig(tile, st->index, GetWaterClass(tile));
03131 
03132   st->owner = OWNER_NONE;
03133   st->airport_type = AT_OILRIG;
03134   st->airport_tile = tile;
03135   st->dock_tile = tile;
03136   st->facilities = FACIL_AIRPORT | FACIL_DOCK;
03137   st->build_date = _date;
03138 
03139   st->rect.BeforeAddTile(tile, StationRect::ADD_FORCE);
03140 
03141   for (CargoID j = 0; j < NUM_CARGO; j++) {
03142     st->goods[j].acceptance_pickup = 0;
03143     st->goods[j].days_since_pickup = 255;
03144     st->goods[j].rating = INITIAL_STATION_RATING;
03145     st->goods[j].last_speed = 0;
03146     st->goods[j].last_age = 255;
03147   }
03148 
03149   st->UpdateVirtCoord();
03150   UpdateStationAcceptance(st, false);
03151   st->RecomputeIndustriesNear();
03152 }
03153 
03154 void DeleteOilRig(TileIndex tile)
03155 {
03156   Station *st = Station::GetByTile(tile);
03157 
03158   MakeWaterKeepingClass(tile, OWNER_NONE);
03159   MarkTileDirtyByTile(tile);
03160 
03161   st->dock_tile = INVALID_TILE;
03162   st->airport_tile = INVALID_TILE;
03163   st->facilities &= ~(FACIL_AIRPORT | FACIL_DOCK);
03164   st->airport_flags = 0;
03165 
03166   st->rect.AfterRemoveTile(st, tile);
03167 
03168   st->UpdateVirtCoord();
03169   st->RecomputeIndustriesNear();
03170   if (!st->IsInUse()) delete st;
03171 }
03172 
03173 static void ChangeTileOwner_Station(TileIndex tile, Owner old_owner, Owner new_owner)
03174 {
03175   if (IsDriveThroughStopTile(tile)) {
03176     for (RoadType rt = ROADTYPE_ROAD; rt < ROADTYPE_END; rt++) {
03177       /* Update all roadtypes, no matter if they are present */
03178       if (GetRoadOwner(tile, rt) == old_owner) {
03179         SetRoadOwner(tile, rt, new_owner == INVALID_OWNER ? OWNER_NONE : new_owner);
03180       }
03181     }
03182   }
03183 
03184   if (!IsTileOwner(tile, old_owner)) return;
03185 
03186   if (new_owner != INVALID_OWNER) {
03187     /* for buoys, owner of tile is owner of water, st->owner == OWNER_NONE */
03188     SetTileOwner(tile, new_owner);
03189     InvalidateWindowClassesData(WC_STATION_LIST, 0);
03190   } else {
03191     if (IsDriveThroughStopTile(tile)) {
03192       /* Remove the drive-through road stop */
03193       DoCommand(tile, 0, (GetStationType(tile) == STATION_TRUCK) ? ROADSTOP_TRUCK : ROADSTOP_BUS, DC_EXEC | DC_BANKRUPT, CMD_REMOVE_ROAD_STOP);
03194       assert(IsTileType(tile, MP_ROAD));
03195       /* Change owner of tile and all roadtypes */
03196       ChangeTileOwner(tile, old_owner, new_owner);
03197     } else {
03198       DoCommand(tile, 0, 0, DC_EXEC | DC_BANKRUPT, CMD_LANDSCAPE_CLEAR);
03199       /* Set tile owner of water under (now removed) buoy and dock to OWNER_NONE.
03200        * Update owner of buoy if it was not removed (was in orders).
03201        * Do not update when owned by OWNER_WATER (sea and rivers). */
03202       if ((IsTileType(tile, MP_WATER) || IsBuoyTile(tile)) && IsTileOwner(tile, old_owner)) SetTileOwner(tile, OWNER_NONE);
03203     }
03204   }
03205 }
03206 
03215 static bool CanRemoveRoadWithStop(TileIndex tile, DoCommandFlag flags)
03216 {
03217   /* Yeah... water can always remove stops, right? */
03218   if (_current_company == OWNER_WATER) return true;
03219 
03220   Owner road_owner = _current_company;
03221   Owner tram_owner = _current_company;
03222 
03223   RoadTypes rts = GetRoadTypes(tile);
03224   if (HasBit(rts, ROADTYPE_ROAD)) road_owner = GetRoadOwner(tile, ROADTYPE_ROAD);
03225   if (HasBit(rts, ROADTYPE_TRAM)) tram_owner = GetRoadOwner(tile, ROADTYPE_TRAM);
03226 
03227   if ((road_owner != OWNER_TOWN && !CheckOwnership(road_owner)) || !CheckOwnership(tram_owner)) return false;
03228 
03229   return road_owner != OWNER_TOWN || CheckAllowRemoveRoad(tile, GetAnyRoadBits(tile, ROADTYPE_ROAD), OWNER_TOWN, ROADTYPE_ROAD, flags);
03230 }
03231 
03232 CommandCost ClearTile_Station(TileIndex tile, DoCommandFlag flags)
03233 {
03234   if (flags & DC_AUTO) {
03235     switch (GetStationType(tile)) {
03236       default: break;
03237       case STATION_RAIL:     return_cmd_error(STR_ERROR_MUST_DEMOLISH_RAILROAD);
03238       case STATION_WAYPOINT: return_cmd_error(STR_ERROR_BUILDING_MUST_BE_DEMOLISHED);
03239       case STATION_AIRPORT:  return_cmd_error(STR_ERROR_MUST_DEMOLISH_AIRPORT_FIRST);
03240       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);
03241       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);
03242       case STATION_BUOY:     return_cmd_error(STR_ERROR_BUOY_IN_THE_WAY);
03243       case STATION_DOCK:     return_cmd_error(STR_ERROR_MUST_DEMOLISH_DOCK_FIRST);
03244       case STATION_OILRIG:
03245         SetDParam(0, STR_INDUSTRY_NAME_OIL_RIG);
03246         return_cmd_error(STR_ERROR_UNMOVABLE_OBJECT_IN_THE_WAY);
03247     }
03248   }
03249 
03250   switch (GetStationType(tile)) {
03251     case STATION_RAIL:     return RemoveRailStation(tile, flags);
03252     case STATION_WAYPOINT: return RemoveRailWaypoint(tile, flags);
03253     case STATION_AIRPORT:  return RemoveAirport(tile, flags);
03254     case STATION_TRUCK:
03255       if (IsDriveThroughStopTile(tile) && !CanRemoveRoadWithStop(tile, flags))
03256         return_cmd_error(STR_ERROR_MUST_DEMOLISH_TRUCK_STATION_FIRST);
03257       return RemoveRoadStop(tile, flags);
03258     case STATION_BUS:
03259       if (IsDriveThroughStopTile(tile) && !CanRemoveRoadWithStop(tile, flags))
03260         return_cmd_error(STR_ERROR_MUST_DEMOLISH_BUS_STATION_FIRST);
03261       return RemoveRoadStop(tile, flags);
03262     case STATION_BUOY:     return RemoveBuoy(tile, flags);
03263     case STATION_DOCK:     return RemoveDock(tile, flags);
03264     default: break;
03265   }
03266 
03267   return CMD_ERROR;
03268 }
03269 
03270 static CommandCost TerraformTile_Station(TileIndex tile, DoCommandFlag flags, uint z_new, Slope tileh_new)
03271 {
03272   if (_settings_game.construction.build_on_slopes && AutoslopeEnabled()) {
03273     /* TODO: If you implement newgrf callback 149 'land slope check', you have to decide what to do with it here.
03274      *       TTDP does not call it.
03275      */
03276     if (!IsSteepSlope(tileh_new) && (GetTileMaxZ(tile) == z_new + GetSlopeMaxZ(tileh_new))) {
03277       switch (GetStationType(tile)) {
03278         case STATION_WAYPOINT:
03279         case STATION_RAIL: {
03280           DiagDirection direction = AxisToDiagDir(GetRailStationAxis(tile));
03281           if (!AutoslopeCheckForEntranceEdge(tile, z_new, tileh_new, direction)) break;
03282           if (!AutoslopeCheckForEntranceEdge(tile, z_new, tileh_new, ReverseDiagDir(direction))) break;
03283           return CommandCost(EXPENSES_CONSTRUCTION, _price[PR_BUILD_FOUNDATION]);
03284         }
03285 
03286         case STATION_AIRPORT:
03287           return CommandCost(EXPENSES_CONSTRUCTION, _price[PR_BUILD_FOUNDATION]);
03288 
03289         case STATION_TRUCK:
03290         case STATION_BUS: {
03291           DiagDirection direction = GetRoadStopDir(tile);
03292           if (!AutoslopeCheckForEntranceEdge(tile, z_new, tileh_new, direction)) break;
03293           if (IsDriveThroughStopTile(tile)) {
03294             if (!AutoslopeCheckForEntranceEdge(tile, z_new, tileh_new, ReverseDiagDir(direction))) break;
03295           }
03296           return CommandCost(EXPENSES_CONSTRUCTION, _price[PR_BUILD_FOUNDATION]);
03297         }
03298 
03299         default: break;
03300       }
03301     }
03302   }
03303   return DoCommand(tile, 0, 0, flags, CMD_LANDSCAPE_CLEAR);
03304 }
03305 
03306 
03307 extern const TileTypeProcs _tile_type_station_procs = {
03308   DrawTile_Station,           // draw_tile_proc
03309   GetSlopeZ_Station,          // get_slope_z_proc
03310   ClearTile_Station,          // clear_tile_proc
03311   NULL,                       // add_accepted_cargo_proc
03312   GetTileDesc_Station,        // get_tile_desc_proc
03313   GetTileTrackStatus_Station, // get_tile_track_status_proc
03314   ClickTile_Station,          // click_tile_proc
03315   AnimateTile_Station,        // animate_tile_proc
03316   TileLoop_Station,           // tile_loop_clear
03317   ChangeTileOwner_Station,    // change_tile_owner_clear
03318   NULL,                       // add_produced_cargo_proc
03319   VehicleEnter_Station,       // vehicle_enter_tile_proc
03320   GetFoundation_Station,      // get_foundation_proc
03321   TerraformTile_Station,      // terraform_tile_proc
03322 };

Generated on Wed Feb 17 23:06:52 2010 for OpenTTD by  doxygen 1.6.1