station_cmd.cpp

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00001 /* $Id: station_cmd.cpp 18921 2010-01-26 23:03:47Z yexo $ */
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 "waypoint_base.h"
00043 #include "waypoint_func.h"
00044 #include "pbs.h"
00045 #include "debug.h"
00046 #include "core/random_func.hpp"
00047 #include "company_base.h"
00048 #include "newgrf.h"
00049 #include "table/airporttile_ids.h"
00050 
00051 #include "table/strings.h"
00052 
00059 bool IsHangar(TileIndex t)
00060 {
00061   assert(IsTileType(t, MP_STATION));
00062 
00063   /* If the tile isn't an airport there's no chance it's a hangar. */
00064   if (!IsAirport(t)) return false;
00065 
00066   const Station *st = Station::GetByTile(t);
00067   const AirportSpec *as = st->GetAirportSpec();
00068 
00069   for (uint i = 0; i < as->nof_depots; i++) {
00070     if (st->GetHangarTile(i) == t) return true;
00071   }
00072 
00073   return false;
00074 }
00075 
00083 template <class T>
00084 bool GetStationAround(TileArea ta, StationID closest_station, T **st)
00085 {
00086   /* check around to see if there's any stations there */
00087   TILE_LOOP(tile_cur, ta.w + 2, ta.h + 2, ta.tile - TileDiffXY(1, 1)) {
00088     if (IsTileType(tile_cur, MP_STATION)) {
00089       StationID t = GetStationIndex(tile_cur);
00090 
00091       if (closest_station == INVALID_STATION) {
00092         if (T::IsValidID(t)) closest_station = t;
00093       } else if (closest_station != t) {
00094         _error_message = STR_ERROR_ADJOINS_MORE_THAN_ONE_EXISTING;
00095         return false;
00096       }
00097     }
00098   }
00099   *st = (closest_station == INVALID_STATION) ? NULL : T::Get(closest_station);
00100   return true;
00101 }
00102 
00108 typedef bool (*CMSAMatcher)(TileIndex tile);
00109 
00116 static int CountMapSquareAround(TileIndex tile, CMSAMatcher cmp)
00117 {
00118   int num = 0;
00119 
00120   for (int dx = -3; dx <= 3; dx++) {
00121     for (int dy = -3; dy <= 3; dy++) {
00122       TileIndex t = TileAddWrap(tile, dx, dy);
00123       if (t != INVALID_TILE && cmp(t)) num++;
00124     }
00125   }
00126 
00127   return num;
00128 }
00129 
00135 static bool CMSAMine(TileIndex tile)
00136 {
00137   /* No industry */
00138   if (!IsTileType(tile, MP_INDUSTRY)) return false;
00139 
00140   const Industry *ind = Industry::GetByTile(tile);
00141 
00142   /* No extractive industry */
00143   if ((GetIndustrySpec(ind->type)->life_type & INDUSTRYLIFE_EXTRACTIVE) == 0) return false;
00144 
00145   for (uint i = 0; i < lengthof(ind->produced_cargo); i++) {
00146     /* The industry extracts something non-liquid, i.e. no oil or plastic, so it is a mine.
00147      * Also the production of passengers and mail is ignored. */
00148     if (ind->produced_cargo[i] != CT_INVALID &&
00149         (CargoSpec::Get(ind->produced_cargo[i])->classes & (CC_LIQUID | CC_PASSENGERS | CC_MAIL)) == 0) {
00150       return true;
00151     }
00152   }
00153 
00154   return false;
00155 }
00156 
00162 static bool CMSAWater(TileIndex tile)
00163 {
00164   return IsTileType(tile, MP_WATER) && IsWater(tile);
00165 }
00166 
00172 static bool CMSATree(TileIndex tile)
00173 {
00174   return IsTileType(tile, MP_TREES);
00175 }
00176 
00182 static bool CMSAForest(TileIndex tile)
00183 {
00184   /* No industry */
00185   if (!IsTileType(tile, MP_INDUSTRY)) return false;
00186 
00187   const Industry *ind = Industry::GetByTile(tile);
00188 
00189   /* No extractive industry */
00190   if ((GetIndustrySpec(ind->type)->life_type & INDUSTRYLIFE_ORGANIC) == 0) return false;
00191 
00192   for (uint i = 0; i < lengthof(ind->produced_cargo); i++) {
00193     /* The industry produces wood. */
00194     if (ind->produced_cargo[i] != CT_INVALID && CargoSpec::Get(ind->produced_cargo[i])->label == 'WOOD') return true;
00195   }
00196 
00197   return false;
00198 }
00199 
00200 #define M(x) ((x) - STR_SV_STNAME)
00201 
00202 enum StationNaming {
00203   STATIONNAMING_RAIL,
00204   STATIONNAMING_ROAD,
00205   STATIONNAMING_AIRPORT,
00206   STATIONNAMING_OILRIG,
00207   STATIONNAMING_DOCK,
00208   STATIONNAMING_HELIPORT,
00209 };
00210 
00212 struct StationNameInformation {
00213   uint32 free_names; 
00214   bool *indtypes;    
00215 };
00216 
00225 static bool FindNearIndustryName(TileIndex tile, void *user_data)
00226 {
00227   /* All already found industry types */
00228   StationNameInformation *sni = (StationNameInformation*)user_data;
00229   if (!IsTileType(tile, MP_INDUSTRY)) return false;
00230 
00231   /* If the station name is undefined it means that it doesn't name a station */
00232   IndustryType indtype = GetIndustryType(tile);
00233   if (GetIndustrySpec(indtype)->station_name == STR_UNDEFINED) return false;
00234 
00235   /* In all cases if an industry that provides a name is found two of
00236    * the standard names will be disabled. */
00237   sni->free_names &= ~(1 << M(STR_SV_STNAME_OILFIELD) | 1 << M(STR_SV_STNAME_MINES));
00238   return !sni->indtypes[indtype];
00239 }
00240 
00241 static StringID GenerateStationName(Station *st, TileIndex tile, StationNaming name_class)
00242 {
00243   static const uint32 _gen_station_name_bits[] = {
00244     0,                                       // STATIONNAMING_RAIL
00245     0,                                       // STATIONNAMING_ROAD
00246     1U << M(STR_SV_STNAME_AIRPORT),          // STATIONNAMING_AIRPORT
00247     1U << M(STR_SV_STNAME_OILFIELD),         // STATIONNAMING_OILRIG
00248     1U << M(STR_SV_STNAME_DOCKS),            // STATIONNAMING_DOCK
00249     1U << M(STR_SV_STNAME_HELIPORT),         // STATIONNAMING_HELIPORT
00250   };
00251 
00252   const Town *t = st->town;
00253   uint32 free_names = UINT32_MAX;
00254 
00255   bool indtypes[NUM_INDUSTRYTYPES];
00256   memset(indtypes, 0, sizeof(indtypes));
00257 
00258   const Station *s;
00259   FOR_ALL_STATIONS(s) {
00260     if (s != st && s->town == t) {
00261       if (s->indtype != IT_INVALID) {
00262         indtypes[s->indtype] = true;
00263         continue;
00264       }
00265       uint str = M(s->string_id);
00266       if (str <= 0x20) {
00267         if (str == M(STR_SV_STNAME_FOREST)) {
00268           str = M(STR_SV_STNAME_WOODS);
00269         }
00270         ClrBit(free_names, str);
00271       }
00272     }
00273   }
00274 
00275   TileIndex indtile = tile;
00276   StationNameInformation sni = { free_names, indtypes };
00277   if (CircularTileSearch(&indtile, 7, FindNearIndustryName, &sni)) {
00278     /* An industry has been found nearby */
00279     IndustryType indtype = GetIndustryType(indtile);
00280     const IndustrySpec *indsp = GetIndustrySpec(indtype);
00281     /* STR_NULL means it only disables oil rig/mines */
00282     if (indsp->station_name != STR_NULL) {
00283       st->indtype = indtype;
00284       return STR_SV_STNAME_FALLBACK;
00285     }
00286   }
00287 
00288   /* Oil rigs/mines name could be marked not free by looking for a near by industry. */
00289   free_names = sni.free_names;
00290 
00291   /* check default names */
00292   uint32 tmp = free_names & _gen_station_name_bits[name_class];
00293   if (tmp != 0) return STR_SV_STNAME + FindFirstBit(tmp);
00294 
00295   /* check mine? */
00296   if (HasBit(free_names, M(STR_SV_STNAME_MINES))) {
00297     if (CountMapSquareAround(tile, CMSAMine) >= 2) {
00298       return STR_SV_STNAME_MINES;
00299     }
00300   }
00301 
00302   /* check close enough to town to get central as name? */
00303   if (DistanceMax(tile, t->xy) < 8) {
00304     if (HasBit(free_names, M(STR_SV_STNAME))) return STR_SV_STNAME;
00305 
00306     if (HasBit(free_names, M(STR_SV_STNAME_CENTRAL))) return STR_SV_STNAME_CENTRAL;
00307   }
00308 
00309   /* Check lakeside */
00310   if (HasBit(free_names, M(STR_SV_STNAME_LAKESIDE)) &&
00311       DistanceFromEdge(tile) < 20 &&
00312       CountMapSquareAround(tile, CMSAWater) >= 5) {
00313     return STR_SV_STNAME_LAKESIDE;
00314   }
00315 
00316   /* Check woods */
00317   if (HasBit(free_names, M(STR_SV_STNAME_WOODS)) && (
00318         CountMapSquareAround(tile, CMSATree) >= 8 ||
00319         CountMapSquareAround(tile, CMSAForest) >= 2)
00320       ) {
00321     return _settings_game.game_creation.landscape == LT_TROPIC ? STR_SV_STNAME_FOREST : STR_SV_STNAME_WOODS;
00322   }
00323 
00324   /* check elevation compared to town */
00325   uint z = GetTileZ(tile);
00326   uint z2 = GetTileZ(t->xy);
00327   if (z < z2) {
00328     if (HasBit(free_names, M(STR_SV_STNAME_VALLEY))) return STR_SV_STNAME_VALLEY;
00329   } else if (z > z2) {
00330     if (HasBit(free_names, M(STR_SV_STNAME_HEIGHTS))) return STR_SV_STNAME_HEIGHTS;
00331   }
00332 
00333   /* check direction compared to town */
00334   static const int8 _direction_and_table[] = {
00335     ~( (1 << M(STR_SV_STNAME_WEST))  | (1 << M(STR_SV_STNAME_EAST)) | (1 << M(STR_SV_STNAME_NORTH)) ),
00336     ~( (1 << M(STR_SV_STNAME_SOUTH)) | (1 << M(STR_SV_STNAME_WEST)) | (1 << M(STR_SV_STNAME_NORTH)) ),
00337     ~( (1 << M(STR_SV_STNAME_SOUTH)) | (1 << M(STR_SV_STNAME_EAST)) | (1 << M(STR_SV_STNAME_NORTH)) ),
00338     ~( (1 << M(STR_SV_STNAME_SOUTH)) | (1 << M(STR_SV_STNAME_WEST)) | (1 << M(STR_SV_STNAME_EAST)) ),
00339   };
00340 
00341   free_names &= _direction_and_table[
00342     (TileX(tile) < TileX(t->xy)) +
00343     (TileY(tile) < TileY(t->xy)) * 2];
00344 
00345   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));
00346   return (tmp == 0) ? STR_SV_STNAME_FALLBACK : (STR_SV_STNAME + FindFirstBit(tmp));
00347 }
00348 #undef M
00349 
00355 static Station *GetClosestDeletedStation(TileIndex tile)
00356 {
00357   uint threshold = 8;
00358   Station *best_station = NULL;
00359   Station *st;
00360 
00361   FOR_ALL_STATIONS(st) {
00362     if (!st->IsInUse() && st->owner == _current_company) {
00363       uint cur_dist = DistanceManhattan(tile, st->xy);
00364 
00365       if (cur_dist < threshold) {
00366         threshold = cur_dist;
00367         best_station = st;
00368       }
00369     }
00370   }
00371 
00372   return best_station;
00373 }
00374 
00375 
00376 void Station::GetTileArea(TileArea *ta, StationType type) const
00377 {
00378   switch (type) {
00379     case STATION_RAIL:
00380       *ta = this->train_station;
00381       return;
00382 
00383     case STATION_AIRPORT:
00384       ta->tile = this->airport_tile;
00385       ta->w    = this->GetAirportSpec()->size_x;
00386       ta->h    = this->GetAirportSpec()->size_y;
00387       return;
00388 
00389     case STATION_TRUCK:
00390       *ta = this->truck_station;
00391       return;
00392 
00393     case STATION_BUS:
00394       *ta = this->bus_station;
00395       return;
00396 
00397     case STATION_DOCK:
00398     case STATION_OILRIG:
00399       ta->tile = this->dock_tile;
00400       break;
00401 
00402     default: NOT_REACHED();
00403   }
00404 
00405   ta->w = 1;
00406   ta->h = 1;
00407 }
00408 
00412 void Station::UpdateVirtCoord()
00413 {
00414   Point pt = RemapCoords2(TileX(this->xy) * TILE_SIZE, TileY(this->xy) * TILE_SIZE);
00415 
00416   pt.y -= 32;
00417   if ((this->facilities & FACIL_AIRPORT) && this->airport_type == AT_OILRIG) pt.y -= 16;
00418 
00419   SetDParam(0, this->index);
00420   SetDParam(1, this->facilities);
00421   this->sign.UpdatePosition(pt.x, pt.y, STR_VIEWPORT_STATION);
00422 
00423   SetWindowDirty(WC_STATION_VIEW, this->index);
00424 }
00425 
00427 void UpdateAllStationVirtCoords()
00428 {
00429   BaseStation *st;
00430 
00431   FOR_ALL_BASE_STATIONS(st) {
00432     st->UpdateVirtCoord();
00433   }
00434 }
00435 
00440 static uint GetAcceptanceMask(const Station *st)
00441 {
00442   uint mask = 0;
00443 
00444   for (CargoID i = 0; i < NUM_CARGO; i++) {
00445     if (HasBit(st->goods[i].acceptance_pickup, GoodsEntry::ACCEPTANCE)) mask |= 1 << i;
00446   }
00447   return mask;
00448 }
00449 
00453 static void ShowRejectOrAcceptNews(const Station *st, uint num_items, CargoID *cargo, StringID msg)
00454 {
00455   for (uint i = 0; i < num_items; i++) {
00456     SetDParam(i + 1, CargoSpec::Get(cargo[i])->name);
00457   }
00458 
00459   SetDParam(0, st->index);
00460   AddNewsItem(msg, NS_ACCEPTANCE, NR_STATION, st->index);
00461 }
00462 
00470 CargoArray GetProductionAroundTiles(TileIndex tile, int w, int h, int rad)
00471 {
00472   CargoArray produced;
00473 
00474   int x = TileX(tile);
00475   int y = TileY(tile);
00476 
00477   /* expand the region by rad tiles on each side
00478    * while making sure that we remain inside the board. */
00479   int x2 = min(x + w + rad, MapSizeX());
00480   int x1 = max(x - rad, 0);
00481 
00482   int y2 = min(y + h + rad, MapSizeY());
00483   int y1 = max(y - rad, 0);
00484 
00485   assert(x1 < x2);
00486   assert(y1 < y2);
00487   assert(w > 0);
00488   assert(h > 0);
00489 
00490   TileArea ta(TileXY(x1, y1), TileXY(x2 - 1, y2 - 1));
00491 
00492   /* Loop over all tiles to get the produced cargo of
00493    * everything except industries */
00494   TILE_AREA_LOOP(tile, ta) AddProducedCargo(tile, produced);
00495 
00496   /* Loop over the industries. They produce cargo for
00497    * anything that is within 'rad' from their bounding
00498    * box. As such if you have e.g. a oil well the tile
00499    * area loop might not hit an industry tile while
00500    * the industry would produce cargo for the station.
00501    */
00502   const Industry *i;
00503   FOR_ALL_INDUSTRIES(i) {
00504     if (!ta.Intersects(i->location)) continue;
00505 
00506     for (uint j = 0; j < lengthof(i->produced_cargo); j++) {
00507       CargoID cargo = i->produced_cargo[j];
00508       if (cargo != CT_INVALID) produced[cargo]++;
00509     }
00510   }
00511 
00512   return produced;
00513 }
00514 
00523 CargoArray GetAcceptanceAroundTiles(TileIndex tile, int w, int h, int rad, uint32 *always_accepted)
00524 {
00525   CargoArray acceptance;
00526   if (always_accepted != NULL) *always_accepted = 0;
00527 
00528   int x = TileX(tile);
00529   int y = TileY(tile);
00530 
00531   /* expand the region by rad tiles on each side
00532    * while making sure that we remain inside the board. */
00533   int x2 = min(x + w + rad, MapSizeX());
00534   int y2 = min(y + h + rad, MapSizeY());
00535   int x1 = max(x - rad, 0);
00536   int y1 = max(y - rad, 0);
00537 
00538   assert(x1 < x2);
00539   assert(y1 < y2);
00540   assert(w > 0);
00541   assert(h > 0);
00542 
00543   for (int yc = y1; yc != y2; yc++) {
00544     for (int xc = x1; xc != x2; xc++) {
00545       TileIndex tile = TileXY(xc, yc);
00546       AddAcceptedCargo(tile, acceptance, always_accepted);
00547     }
00548   }
00549 
00550   return acceptance;
00551 }
00552 
00557 void UpdateStationAcceptance(Station *st, bool show_msg)
00558 {
00559   /* old accepted goods types */
00560   uint old_acc = GetAcceptanceMask(st);
00561 
00562   /* And retrieve the acceptance. */
00563   CargoArray acceptance;
00564   if (!st->rect.IsEmpty()) {
00565     acceptance = GetAcceptanceAroundTiles(
00566       TileXY(st->rect.left, st->rect.top),
00567       st->rect.right  - st->rect.left + 1,
00568       st->rect.bottom - st->rect.top  + 1,
00569       st->GetCatchmentRadius(),
00570       &st->always_accepted
00571     );
00572   }
00573 
00574   /* Adjust in case our station only accepts fewer kinds of goods */
00575   for (CargoID i = 0; i < NUM_CARGO; i++) {
00576     uint amt = min(acceptance[i], 15);
00577 
00578     /* Make sure the station can accept the goods type. */
00579     bool is_passengers = IsCargoInClass(i, CC_PASSENGERS);
00580     if ((!is_passengers && !(st->facilities & ~FACIL_BUS_STOP)) ||
00581         (is_passengers && !(st->facilities & ~FACIL_TRUCK_STOP))) {
00582       amt = 0;
00583     }
00584 
00585     SB(st->goods[i].acceptance_pickup, GoodsEntry::ACCEPTANCE, 1, amt >= 8);
00586   }
00587 
00588   /* Only show a message in case the acceptance was actually changed. */
00589   uint new_acc = GetAcceptanceMask(st);
00590   if (old_acc == new_acc) return;
00591 
00592   /* show a message to report that the acceptance was changed? */
00593   if (show_msg && st->owner == _local_company && st->IsInUse()) {
00594     /* List of accept and reject strings for different number of
00595      * cargo types */
00596     static const StringID accept_msg[] = {
00597       STR_NEWS_STATION_NOW_ACCEPTS_CARGO,
00598       STR_NEWS_STATION_NOW_ACCEPTS_CARGO_AND_CARGO,
00599     };
00600     static const StringID reject_msg[] = {
00601       STR_NEWS_STATION_NO_LONGER_ACCEPTS_CARGO,
00602       STR_NEWS_STATION_NO_LONGER_ACCEPTS_CARGO_OR_CARGO,
00603     };
00604 
00605     /* Array of accepted and rejected cargo types */
00606     CargoID accepts[2] = { CT_INVALID, CT_INVALID };
00607     CargoID rejects[2] = { CT_INVALID, CT_INVALID };
00608     uint num_acc = 0;
00609     uint num_rej = 0;
00610 
00611     /* Test each cargo type to see if its acceptange has changed */
00612     for (CargoID i = 0; i < NUM_CARGO; i++) {
00613       if (HasBit(new_acc, i)) {
00614         if (!HasBit(old_acc, i) && num_acc < lengthof(accepts)) {
00615           /* New cargo is accepted */
00616           accepts[num_acc++] = i;
00617         }
00618       } else {
00619         if (HasBit(old_acc, i) && num_rej < lengthof(rejects)) {
00620           /* Old cargo is no longer accepted */
00621           rejects[num_rej++] = i;
00622         }
00623       }
00624     }
00625 
00626     /* Show news message if there are any changes */
00627     if (num_acc > 0) ShowRejectOrAcceptNews(st, num_acc, accepts, accept_msg[num_acc - 1]);
00628     if (num_rej > 0) ShowRejectOrAcceptNews(st, num_rej, rejects, reject_msg[num_rej - 1]);
00629   }
00630 
00631   /* redraw the station view since acceptance changed */
00632   SetWindowWidgetDirty(WC_STATION_VIEW, st->index, SVW_ACCEPTLIST);
00633 }
00634 
00635 static void UpdateStationSignCoord(BaseStation *st)
00636 {
00637   const StationRect *r = &st->rect;
00638 
00639   if (r->IsEmpty()) return; // no tiles belong to this station
00640 
00641   /* clamp sign coord to be inside the station rect */
00642   st->xy = TileXY(ClampU(TileX(st->xy), r->left, r->right), ClampU(TileY(st->xy), r->top, r->bottom));
00643   st->UpdateVirtCoord();
00644 }
00645 
00651 static void DeleteStationIfEmpty(BaseStation *st)
00652 {
00653   if (!st->IsInUse()) {
00654     st->delete_ctr = 0;
00655     InvalidateWindowData(WC_STATION_LIST, st->owner, 0);
00656   }
00657   /* station remains but it probably lost some parts - station sign should stay in the station boundaries */
00658   UpdateStationSignCoord(st);
00659 }
00660 
00661 CommandCost ClearTile_Station(TileIndex tile, DoCommandFlag flags);
00662 
00674 CommandCost CheckFlatLandBelow(TileIndex tile, uint w, uint h, DoCommandFlag flags, uint invalid_dirs, StationID *station, bool check_clear = true, RailType rt = INVALID_RAILTYPE)
00675 {
00676   CommandCost cost(EXPENSES_CONSTRUCTION);
00677   int allowed_z = -1;
00678 
00679   TILE_LOOP(tile_cur, w, h, tile) {
00680     if (MayHaveBridgeAbove(tile_cur) && IsBridgeAbove(tile_cur)) {
00681       return_cmd_error(STR_ERROR_MUST_DEMOLISH_BRIDGE_FIRST);
00682     }
00683 
00684     if (!EnsureNoVehicleOnGround(tile_cur)) return CMD_ERROR;
00685 
00686     uint z;
00687     Slope tileh = GetTileSlope(tile_cur, &z);
00688 
00689     /* Prohibit building if
00690      *   1) The tile is "steep" (i.e. stretches two height levels)
00691      *   2) The tile is non-flat and the build_on_slopes switch is disabled
00692      */
00693     if (IsSteepSlope(tileh) ||
00694         ((!_settings_game.construction.build_on_slopes) && tileh != SLOPE_FLAT)) {
00695       return_cmd_error(STR_ERROR_FLAT_LAND_REQUIRED);
00696     }
00697 
00698     int flat_z = z;
00699     if (tileh != SLOPE_FLAT) {
00700       /* need to check so the entrance to the station is not pointing at a slope.
00701        * This must be valid for all station tiles, as the user can remove single station tiles. */
00702       if ((HasBit(invalid_dirs, DIAGDIR_NE) && !(tileh & SLOPE_NE)) ||
00703           (HasBit(invalid_dirs, DIAGDIR_SE) && !(tileh & SLOPE_SE)) ||
00704           (HasBit(invalid_dirs, DIAGDIR_SW) && !(tileh & SLOPE_SW)) ||
00705           (HasBit(invalid_dirs, DIAGDIR_NW) && !(tileh & SLOPE_NW))) {
00706         return_cmd_error(STR_ERROR_FLAT_LAND_REQUIRED);
00707       }
00708       cost.AddCost(_price[PR_BUILD_FOUNDATION]);
00709       flat_z += TILE_HEIGHT;
00710     }
00711 
00712     /* get corresponding flat level and make sure that all parts of the station have the same level. */
00713     if (allowed_z == -1) {
00714       /* first tile */
00715       allowed_z = flat_z;
00716     } else if (allowed_z != flat_z) {
00717       return_cmd_error(STR_ERROR_FLAT_LAND_REQUIRED);
00718     }
00719 
00720     /* if station is set, then we have special handling to allow building on top of already existing stations.
00721      * so station points to INVALID_STATION if we can build on any station.
00722      * Or it points to a station if we're only allowed to build on exactly that station. */
00723     if (station != NULL && IsTileType(tile_cur, MP_STATION)) {
00724       if (!IsRailStation(tile_cur)) {
00725         return ClearTile_Station(tile_cur, DC_AUTO); // get error message
00726       } else {
00727         StationID st = GetStationIndex(tile_cur);
00728         if (*station == INVALID_STATION) {
00729           *station = st;
00730         } else if (*station != st) {
00731           return_cmd_error(STR_ERROR_ADJOINS_MORE_THAN_ONE_EXISTING);
00732         }
00733       }
00734     } else if (check_clear) {
00735       /* Rail type is only valid when building a railway station; in station to
00736        * build isn't a rail station it's INVALID_RAILTYPE. */
00737       if (rt != INVALID_RAILTYPE &&
00738           IsPlainRailTile(tile_cur) && !HasSignals(tile_cur) &&
00739           HasPowerOnRail(GetRailType(tile_cur), rt)) {
00740         /* Allow overbuilding if the tile:
00741          *  - has rail, but no signals
00742          *  - it has exactly one track
00743          *  - the track is in line with the station
00744          *  - the current rail type has power on the to-be-built type (e.g. convert normal rail to el rail)
00745          */
00746         TrackBits tracks = GetTrackBits(tile_cur);
00747         Track track = RemoveFirstTrack(&tracks);
00748         Track expected_track = HasBit(invalid_dirs, DIAGDIR_NE) ? TRACK_X : TRACK_Y;
00749 
00750         if (tracks == TRACK_BIT_NONE && track == expected_track) {
00751           CommandCost ret = DoCommand(tile_cur, 0, track, flags, CMD_REMOVE_SINGLE_RAIL);
00752           if (ret.Failed()) return ret;
00753           cost.AddCost(ret);
00754           /* With flags & ~DC_EXEC CmdLandscapeClear would fail since the rail still exists */
00755           continue;
00756         }
00757       }
00758       CommandCost ret = DoCommand(tile_cur, 0, 0, flags, CMD_LANDSCAPE_CLEAR);
00759       if (ret.Failed()) return ret;
00760       cost.AddCost(ret);
00761     }
00762   }
00763 
00764   return cost;
00765 }
00766 
00774 bool CanExpandRailStation(const BaseStation *st, TileArea &new_ta, Axis axis)
00775 {
00776   TileArea cur_ta = st->train_station;
00777 
00778   if (_settings_game.station.nonuniform_stations) {
00779     /* determine new size of train station region.. */
00780     int x = min(TileX(cur_ta.tile), TileX(new_ta.tile));
00781     int y = min(TileY(cur_ta.tile), TileY(new_ta.tile));
00782     new_ta.w = max(TileX(cur_ta.tile) + cur_ta.w, TileX(new_ta.tile) + new_ta.w) - x;
00783     new_ta.h = max(TileY(cur_ta.tile) + cur_ta.h, TileY(new_ta.tile) + new_ta.h) - y;
00784     new_ta.tile = TileXY(x, y);
00785   } else {
00786     /* do not allow modifying non-uniform stations,
00787      * the uniform-stations code wouldn't handle it well */
00788     TILE_LOOP(t, cur_ta.w, cur_ta.h, cur_ta.tile) {
00789       if (!st->TileBelongsToRailStation(t)) { // there may be adjoined station
00790         _error_message = STR_ERROR_NONUNIFORM_STATIONS_DISALLOWED;
00791         return false;
00792       }
00793     }
00794 
00795     /* check so the orientation is the same */
00796     if (GetRailStationAxis(cur_ta.tile) != axis) {
00797       _error_message = STR_ERROR_NONUNIFORM_STATIONS_DISALLOWED;
00798       return false;
00799     }
00800 
00801     /* check if the new station adjoins the old station in either direction */
00802     if (cur_ta.w == new_ta.w && cur_ta.tile == new_ta.tile + TileDiffXY(0, new_ta.h)) {
00803       /* above */
00804       new_ta.h += cur_ta.h;
00805     } else if (cur_ta.w == new_ta.w && cur_ta.tile == new_ta.tile - TileDiffXY(0, cur_ta.h)) {
00806       /* below */
00807       new_ta.tile = cur_ta.tile;
00808       new_ta.h += new_ta.h;
00809     } else if (cur_ta.h == new_ta.h && cur_ta.tile == new_ta.tile + TileDiffXY(new_ta.w, 0)) {
00810       /* to the left */
00811       new_ta.w += cur_ta.w;
00812     } else if (cur_ta.h == new_ta.h && cur_ta.tile == new_ta.tile - TileDiffXY(cur_ta.w, 0)) {
00813       /* to the right */
00814       new_ta.tile = cur_ta.tile;
00815       new_ta.w += cur_ta.w;
00816     } else {
00817       _error_message = STR_ERROR_NONUNIFORM_STATIONS_DISALLOWED;
00818       return false;
00819     }
00820   }
00821   /* make sure the final size is not too big. */
00822   if (new_ta.w > _settings_game.station.station_spread || new_ta.h > _settings_game.station.station_spread) {
00823     _error_message = STR_ERROR_STATION_TOO_SPREAD_OUT;
00824     return false;
00825   }
00826 
00827   return true;
00828 }
00829 
00830 static inline byte *CreateSingle(byte *layout, int n)
00831 {
00832   int i = n;
00833   do *layout++ = 0; while (--i);
00834   layout[((n - 1) >> 1) - n] = 2;
00835   return layout;
00836 }
00837 
00838 static inline byte *CreateMulti(byte *layout, int n, byte b)
00839 {
00840   int i = n;
00841   do *layout++ = b; while (--i);
00842   if (n > 4) {
00843     layout[0 - n] = 0;
00844     layout[n - 1 - n] = 0;
00845   }
00846   return layout;
00847 }
00848 
00849 void GetStationLayout(byte *layout, int numtracks, int plat_len, const StationSpec *statspec)
00850 {
00851   if (statspec != NULL && statspec->lengths >= plat_len &&
00852       statspec->platforms[plat_len - 1] >= numtracks &&
00853       statspec->layouts[plat_len - 1][numtracks - 1]) {
00854     /* Custom layout defined, follow it. */
00855     memcpy(layout, statspec->layouts[plat_len - 1][numtracks - 1],
00856       plat_len * numtracks);
00857     return;
00858   }
00859 
00860   if (plat_len == 1) {
00861     CreateSingle(layout, numtracks);
00862   } else {
00863     if (numtracks & 1) layout = CreateSingle(layout, plat_len);
00864     numtracks >>= 1;
00865 
00866     while (--numtracks >= 0) {
00867       layout = CreateMulti(layout, plat_len, 4);
00868       layout = CreateMulti(layout, plat_len, 6);
00869     }
00870   }
00871 }
00872 
00884 template <class T, StringID error_message>
00885 CommandCost FindJoiningBaseStation(StationID existing_station, StationID station_to_join, bool adjacent, TileArea ta, T **st)
00886 {
00887   assert(*st == NULL);
00888   bool check_surrounding = true;
00889 
00890   if (_settings_game.station.adjacent_stations) {
00891     if (existing_station != INVALID_STATION) {
00892       if (adjacent && existing_station != station_to_join) {
00893         /* You can't build an adjacent station over the top of one that
00894          * already exists. */
00895         return_cmd_error(error_message);
00896       } else {
00897         /* Extend the current station, and don't check whether it will
00898          * be near any other stations. */
00899         *st = T::GetIfValid(existing_station);
00900         check_surrounding = (*st == NULL);
00901       }
00902     } else {
00903       /* There's no station here. Don't check the tiles surrounding this
00904        * one if the company wanted to build an adjacent station. */
00905       if (adjacent) check_surrounding = false;
00906     }
00907   }
00908 
00909   if (check_surrounding) {
00910     /* Make sure there are no similar stations around us. */
00911     if (!GetStationAround(ta, existing_station, st)) return CMD_ERROR;
00912   }
00913 
00914   /* Distant join */
00915   if (*st == NULL && station_to_join != INVALID_STATION) *st = T::GetIfValid(station_to_join);
00916 
00917   return CommandCost();;
00918 }
00919 
00929 static CommandCost FindJoiningStation(StationID existing_station, StationID station_to_join, bool adjacent, TileArea ta, Station **st)
00930 {
00931   return FindJoiningBaseStation<Station, STR_ERROR_MUST_REMOVE_RAILWAY_STATION_FIRST>(existing_station, station_to_join, adjacent, ta, st);
00932 }
00933 
00943 CommandCost FindJoiningWaypoint(StationID existing_waypoint, StationID waypoint_to_join, bool adjacent, TileArea ta, Waypoint **wp)
00944 {
00945   return FindJoiningBaseStation<Waypoint, STR_ERROR_MUST_REMOVE_RAILWAYPOINT_FIRST>(existing_waypoint, waypoint_to_join, adjacent, ta, wp);
00946 }
00947 
00965 CommandCost CmdBuildRailStation(TileIndex tile_org, DoCommandFlag flags, uint32 p1, uint32 p2, const char *text)
00966 {
00967   /* Unpack parameters */
00968   RailType rt    = (RailType)GB(p1, 0, 4);
00969   Axis axis      = Extract<Axis, 4>(p1);
00970   byte numtracks = GB(p1,  8, 8);
00971   byte plat_len  = GB(p1, 16, 8);
00972   bool adjacent  = HasBit(p1, 24);
00973 
00974   StationClassID spec_class = (StationClassID)GB(p2, 0, 8);
00975   byte spec_index           = GB(p2, 8, 8);
00976   StationID station_to_join = GB(p2, 16, 16);
00977 
00978   /* Does the authority allow this? */
00979   if (!CheckIfAuthorityAllowsNewStation(tile_org, flags)) return CMD_ERROR;
00980   if (!ValParamRailtype(rt)) return CMD_ERROR;
00981 
00982   /* Check if the given station class is valid */
00983   if ((uint)spec_class >= GetNumStationClasses()) return CMD_ERROR;
00984   if (spec_index >= GetNumCustomStations(spec_class)) return CMD_ERROR;
00985   if (plat_len == 0 || numtracks == 0) return CMD_ERROR;
00986 
00987   int w_org, h_org;
00988   if (axis == AXIS_X) {
00989     w_org = plat_len;
00990     h_org = numtracks;
00991   } else {
00992     h_org = plat_len;
00993     w_org = numtracks;
00994   }
00995 
00996   bool reuse = (station_to_join != NEW_STATION);
00997   if (!reuse) station_to_join = INVALID_STATION;
00998   bool distant_join = (station_to_join != INVALID_STATION);
00999 
01000   if (distant_join && (!_settings_game.station.distant_join_stations || !Station::IsValidID(station_to_join))) return CMD_ERROR;
01001 
01002   if (h_org > _settings_game.station.station_spread || w_org > _settings_game.station.station_spread) return CMD_ERROR;
01003 
01004   /* these values are those that will be stored in train_tile and station_platforms */
01005   TileArea new_location(tile_org, w_org, h_org);
01006 
01007   /* Make sure the area below consists of clear tiles. (OR tiles belonging to a certain rail station) */
01008   StationID est = INVALID_STATION;
01009   /* If DC_EXEC is in flag, do not want to pass it to CheckFlatLandBelow, because of a nice bug
01010    * for detail info, see:
01011    * https://sourceforge.net/tracker/index.php?func=detail&aid=1029064&group_id=103924&atid=636365 */
01012   CommandCost ret = CheckFlatLandBelow(tile_org, w_org, h_org, flags & ~DC_EXEC, 5 << axis, _settings_game.station.nonuniform_stations ? &est : NULL, true, rt);
01013   if (ret.Failed()) return ret;
01014   CommandCost cost(EXPENSES_CONSTRUCTION, ret.GetCost() + (numtracks * _price[PR_BUILD_STATION_RAIL] + _price[PR_BUILD_STATION_RAIL_LENGTH]) * plat_len);
01015 
01016   Station *st = NULL;
01017   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     /* Now really clear the land below the station
01080      * It should never return CMD_ERROR.. but you never know ;)
01081      * (a bit strange function name for it, but it really does clear the land, when DC_EXEC is in flags) */
01082     ret = CheckFlatLandBelow(tile_org, w_org, h_org, flags, 5 << axis, _settings_game.station.nonuniform_stations ? &est : NULL, true, rt);
01083     if (ret.Failed()) return ret;
01084 
01085     st->train_station = new_location;
01086     st->AddFacility(FACIL_TRAIN, new_location.tile);
01087 
01088     st->rect.BeforeAddRect(tile_org, w_org, h_org, StationRect::ADD_TRY);
01089 
01090     if (statspec != NULL) {
01091       /* Include this station spec's animation trigger bitmask
01092        * in the station's cached copy. */
01093       st->cached_anim_triggers |= statspec->anim_triggers;
01094     }
01095 
01096     tile_delta = (axis == AXIS_X ? TileDiffXY(1, 0) : TileDiffXY(0, 1));
01097     track = AxisToTrack(axis);
01098 
01099     layout_ptr = AllocaM(byte, numtracks * plat_len);
01100     GetStationLayout(layout_ptr, numtracks, plat_len, statspec);
01101 
01102     numtracks_orig = numtracks;
01103 
01104     SmallVector<Train*, 4> affected_vehicles;
01105     do {
01106       TileIndex tile = tile_org;
01107       int w = plat_len;
01108       do {
01109         byte layout = *layout_ptr++;
01110         if (IsRailStationTile(tile) && HasStationReservation(tile)) {
01111           /* Check for trains having a reservation for this tile. */
01112           Train *v = GetTrainForReservation(tile, AxisToTrack(GetRailStationAxis(tile)));
01113           if (v != NULL) {
01114             FreeTrainTrackReservation(v);
01115             *affected_vehicles.Append() = v;
01116             if (IsRailStationTile(v->tile)) SetRailStationPlatformReservation(v->tile, TrackdirToExitdir(v->GetVehicleTrackdir()), false);
01117             for (; v->Next() != NULL; v = v->Next()) { }
01118             if (IsRailStationTile(v->tile)) SetRailStationPlatformReservation(v->tile, TrackdirToExitdir(ReverseTrackdir(v->GetVehicleTrackdir())), false);
01119           }
01120         }
01121 
01122         /* Remove animation if overbuilding */
01123         DeleteAnimatedTile(tile);
01124         byte old_specindex = HasStationTileRail(tile) ? GetCustomStationSpecIndex(tile) : 0;
01125         MakeRailStation(tile, st->owner, st->index, axis, layout & ~1, rt);
01126         /* Free the spec if we overbuild something */
01127         DeallocateSpecFromStation(st, old_specindex);
01128 
01129         SetCustomStationSpecIndex(tile, specindex);
01130         SetStationTileRandomBits(tile, GB(Random(), 0, 4));
01131         SetStationAnimationFrame(tile, 0);
01132 
01133         if (statspec != NULL) {
01134           /* Use a fixed axis for GetPlatformInfo as our platforms / numtracks are always the right way around */
01135           uint32 platinfo = GetPlatformInfo(AXIS_X, 0, plat_len, numtracks_orig, plat_len - w, numtracks_orig - numtracks, false);
01136 
01137           /* As the station is not yet completely finished, the station does not yet exist. */
01138           uint16 callback = GetStationCallback(CBID_STATION_TILE_LAYOUT, platinfo, 0, statspec, NULL, tile);
01139           if (callback != CALLBACK_FAILED && callback < 8) SetStationGfx(tile, (callback & ~1) + axis);
01140 
01141           /* Trigger station animation -- after building? */
01142           StationAnimationTrigger(st, tile, STAT_ANIM_BUILT);
01143         }
01144 
01145         tile += tile_delta;
01146       } while (--w);
01147       AddTrackToSignalBuffer(tile_org, track, _current_company);
01148       YapfNotifyTrackLayoutChange(tile_org, track);
01149       tile_org += tile_delta ^ TileDiffXY(1, 1); // perpendicular to tile_delta
01150     } while (--numtracks);
01151 
01152     for (uint i = 0; i < affected_vehicles.Length(); ++i) {
01153       /* Restore reservations of trains. */
01154       Train *v = affected_vehicles[i];
01155       if (IsRailStationTile(v->tile)) SetRailStationPlatformReservation(v->tile, TrackdirToExitdir(v->GetVehicleTrackdir()), true);
01156       TryPathReserve(v, true, true);
01157       for (; v->Next() != NULL; v = v->Next()) { }
01158       if (IsRailStationTile(v->tile)) SetRailStationPlatformReservation(v->tile, TrackdirToExitdir(ReverseTrackdir(v->GetVehicleTrackdir())), true);
01159     }
01160 
01161     st->MarkTilesDirty(false);
01162     st->UpdateVirtCoord();
01163     UpdateStationAcceptance(st, false);
01164     st->RecomputeIndustriesNear();
01165     InvalidateWindowData(WC_SELECT_STATION, 0, 0);
01166     InvalidateWindowData(WC_STATION_LIST, st->owner, 0);
01167     SetWindowWidgetDirty(WC_STATION_VIEW, st->index, SVW_TRAINS);
01168   }
01169 
01170   return cost;
01171 }
01172 
01173 static void MakeRailStationAreaSmaller(BaseStation *st)
01174 {
01175   TileArea ta = st->train_station;
01176 
01177 restart:
01178 
01179   /* too small? */
01180   if (ta.w != 0 && ta.h != 0) {
01181     /* check the left side, x = constant, y changes */
01182     for (uint i = 0; !st->TileBelongsToRailStation(ta.tile + TileDiffXY(0, i));) {
01183       /* the left side is unused? */
01184       if (++i == ta.h) {
01185         ta.tile += TileDiffXY(1, 0);
01186         ta.w--;
01187         goto restart;
01188       }
01189     }
01190 
01191     /* check the right side, x = constant, y changes */
01192     for (uint i = 0; !st->TileBelongsToRailStation(ta.tile + TileDiffXY(ta.w - 1, i));) {
01193       /* the right side is unused? */
01194       if (++i == ta.h) {
01195         ta.w--;
01196         goto restart;
01197       }
01198     }
01199 
01200     /* check the upper side, y = constant, x changes */
01201     for (uint i = 0; !st->TileBelongsToRailStation(ta.tile + TileDiffXY(i, 0));) {
01202       /* the left side is unused? */
01203       if (++i == ta.w) {
01204         ta.tile += TileDiffXY(0, 1);
01205         ta.h--;
01206         goto restart;
01207       }
01208     }
01209 
01210     /* check the lower side, y = constant, x changes */
01211     for (uint i = 0; !st->TileBelongsToRailStation(ta.tile + TileDiffXY(i, ta.h - 1));) {
01212       /* the left side is unused? */
01213       if (++i == ta.w) {
01214         ta.h--;
01215         goto restart;
01216       }
01217     }
01218   } else {
01219     ta.Clear();
01220   }
01221 
01222   st->train_station = ta;
01223 }
01224 
01235 template <class T>
01236 CommandCost RemoveFromRailBaseStation(TileArea ta, SmallVector<T *, 4> &affected_stations, DoCommandFlag flags, Money removal_cost, bool keep_rail)
01237 {
01238   /* Count of the number of tiles removed */
01239   int quantity = 0;
01240   CommandCost total_cost(EXPENSES_CONSTRUCTION);
01241 
01242   /* Do the action for every tile into the area */
01243   TILE_AREA_LOOP(tile, ta) {
01244     /* Make sure the specified tile is a rail station */
01245     if (!HasStationTileRail(tile)) continue;
01246 
01247     /* If there is a vehicle on ground, do not allow to remove (flood) the tile */
01248     if (!EnsureNoVehicleOnGround(tile)) continue;
01249 
01250     /* Check ownership of station */
01251     T *st = T::GetByTile(tile);
01252     if (st == NULL) continue;
01253     if (_current_company != OWNER_WATER && !CheckOwnership(st->owner)) continue;
01254 
01255     /* Do not allow removing from stations if non-uniform stations are not enabled
01256      * The check must be here to give correct error message
01257      */
01258     if (!_settings_game.station.nonuniform_stations) return_cmd_error(STR_ERROR_NONUNIFORM_STATIONS_DISALLOWED);
01259 
01260     /* If we reached here, the tile is valid so increase the quantity of tiles we will remove */
01261     quantity++;
01262 
01263     if (flags & DC_EXEC) {
01264       /* read variables before the station tile is removed */
01265       uint specindex = GetCustomStationSpecIndex(tile);
01266       Track track = GetRailStationTrack(tile);
01267       Owner owner = GetTileOwner(tile);
01268       RailType rt = GetRailType(tile);
01269       Train *v = NULL;
01270 
01271       if (HasStationReservation(tile)) {
01272         v = GetTrainForReservation(tile, track);
01273         if (v != NULL) {
01274           /* Free train reservation. */
01275           FreeTrainTrackReservation(v);
01276           if (IsRailStationTile(v->tile)) SetRailStationPlatformReservation(v->tile, TrackdirToExitdir(v->GetVehicleTrackdir()), false);
01277           Vehicle *temp = v;
01278           for (; temp->Next() != NULL; temp = temp->Next()) { }
01279           if (IsRailStationTile(temp->tile)) SetRailStationPlatformReservation(temp->tile, TrackdirToExitdir(ReverseTrackdir(temp->GetVehicleTrackdir())), false);
01280         }
01281       }
01282 
01283       DoClearSquare(tile);
01284       if (keep_rail) MakeRailNormal(tile, owner, TrackToTrackBits(track), rt);
01285 
01286       st->rect.AfterRemoveTile(st, tile);
01287       AddTrackToSignalBuffer(tile, track, owner);
01288       YapfNotifyTrackLayoutChange(tile, track);
01289 
01290       DeallocateSpecFromStation(st, specindex);
01291 
01292       affected_stations.Include(st);
01293 
01294       if (v != NULL) {
01295         /* Restore station reservation. */
01296         if (IsRailStationTile(v->tile)) SetRailStationPlatformReservation(v->tile, TrackdirToExitdir(v->GetVehicleTrackdir()), true);
01297         TryPathReserve(v, true, true);
01298         for (; v->Next() != NULL; v = v->Next()) { }
01299         if (IsRailStationTile(v->tile)) SetRailStationPlatformReservation(v->tile, TrackdirToExitdir(ReverseTrackdir(v->GetVehicleTrackdir())), true);
01300       }
01301     }
01302     if (keep_rail) {
01303       /* Don't refund the 'steel' of the track! */
01304       total_cost.AddCost(-_price[PR_CLEAR_RAIL]);
01305     }
01306   }
01307 
01308   if (quantity == 0) return CMD_ERROR;
01309 
01310   for (T **stp = affected_stations.Begin(); stp != affected_stations.End(); stp++) {
01311     T *st = *stp;
01312 
01313     /* now we need to make the "spanned" area of the railway station smaller
01314      * if we deleted something at the edges.
01315      * we also need to adjust train_tile. */
01316     MakeRailStationAreaSmaller(st);
01317     UpdateStationSignCoord(st);
01318 
01319     /* if we deleted the whole station, delete the train facility. */
01320     if (st->train_station.tile == INVALID_TILE) {
01321       st->facilities &= ~FACIL_TRAIN;
01322       SetWindowWidgetDirty(WC_STATION_VIEW, st->index, SVW_TRAINS);
01323       st->UpdateVirtCoord();
01324       DeleteStationIfEmpty(st);
01325     }
01326   }
01327 
01328   total_cost.AddCost(quantity * removal_cost);
01329   return total_cost;
01330 }
01331 
01342 CommandCost CmdRemoveFromRailStation(TileIndex start, DoCommandFlag flags, uint32 p1, uint32 p2, const char *text)
01343 {
01344   TileIndex end = p1 == 0 ? start : p1;
01345   if (start >= MapSize() || end >= MapSize()) return CMD_ERROR;
01346 
01347   TileArea ta(start, end);
01348   SmallVector<Station *, 4> affected_stations;
01349 
01350   CommandCost ret = RemoveFromRailBaseStation(ta, affected_stations, flags, _price[PR_CLEAR_STATION_RAIL], HasBit(p2, 0));
01351   if (ret.Failed()) return ret;
01352 
01353   /* Do all station specific functions here. */
01354   for (Station **stp = affected_stations.Begin(); stp != affected_stations.End(); stp++) {
01355     Station *st = *stp;
01356 
01357     if (st->train_station.tile == INVALID_TILE) SetWindowWidgetDirty(WC_STATION_VIEW, st->index, SVW_TRAINS);
01358     st->MarkTilesDirty(false);
01359     st->RecomputeIndustriesNear();
01360   }
01361 
01362   /* Now apply the rail cost to the number that we deleted */
01363   return ret;
01364 }
01365 
01376 CommandCost CmdRemoveFromRailWaypoint(TileIndex start, DoCommandFlag flags, uint32 p1, uint32 p2, const char *text)
01377 {
01378   TileIndex end = p1 == 0 ? start : p1;
01379   if (start >= MapSize() || end >= MapSize()) return CMD_ERROR;
01380 
01381   TileArea ta(start, end);
01382   SmallVector<Waypoint *, 4> affected_stations;
01383 
01384   return RemoveFromRailBaseStation(ta, affected_stations, flags, _price[PR_CLEAR_WAYPOINT_RAIL], HasBit(p2, 0));
01385 }
01386 
01387 
01395 template <class T>
01396 CommandCost RemoveRailStation(T *st, DoCommandFlag flags)
01397 {
01398   /* Current company owns the station? */
01399   if (_current_company != OWNER_WATER && !CheckOwnership(st->owner)) return CMD_ERROR;
01400 
01401   /* determine width and height of platforms */
01402   TileArea ta = st->train_station;
01403 
01404   assert(ta.w != 0 && ta.h != 0);
01405 
01406   CommandCost cost(EXPENSES_CONSTRUCTION);
01407   /* clear all areas of the station */
01408   TILE_AREA_LOOP(tile, ta) {
01409     /* for nonuniform stations, only remove tiles that are actually train station tiles */
01410     if (!st->TileBelongsToRailStation(tile)) continue;
01411 
01412     if (!EnsureNoVehicleOnGround(tile)) return CMD_ERROR;
01413 
01414     cost.AddCost(_price[PR_CLEAR_STATION_RAIL]);
01415     if (flags & DC_EXEC) {
01416       /* read variables before the station tile is removed */
01417       Track track = GetRailStationTrack(tile);
01418       Owner owner = GetTileOwner(tile); // _current_company can be OWNER_WATER
01419       Train *v = NULL;
01420       if (HasStationReservation(tile)) {
01421         v = GetTrainForReservation(tile, track);
01422         if (v != NULL) FreeTrainTrackReservation(v);
01423       }
01424       DoClearSquare(tile);
01425       AddTrackToSignalBuffer(tile, track, owner);
01426       YapfNotifyTrackLayoutChange(tile, track);
01427       if (v != NULL) TryPathReserve(v, true);
01428     }
01429   }
01430 
01431   if (flags & DC_EXEC) {
01432     st->rect.AfterRemoveRect(st, st->train_station.tile, st->train_station.w, st->train_station.h);
01433 
01434     st->train_station.Clear();
01435 
01436     st->facilities &= ~FACIL_TRAIN;
01437 
01438     free(st->speclist);
01439     st->num_specs = 0;
01440     st->speclist  = NULL;
01441     st->cached_anim_triggers = 0;
01442 
01443     SetWindowWidgetDirty(WC_STATION_VIEW, st->index, SVW_TRAINS);
01444     st->UpdateVirtCoord();
01445     DeleteStationIfEmpty(st);
01446   }
01447 
01448   return cost;
01449 }
01450 
01457 static CommandCost RemoveRailStation(TileIndex tile, DoCommandFlag flags)
01458 {
01459   /* if there is flooding and non-uniform stations are enabled, remove platforms tile by tile */
01460   if (_current_company == OWNER_WATER && _settings_game.station.nonuniform_stations) {
01461     return DoCommand(tile, 0, 0, DC_EXEC, CMD_REMOVE_FROM_RAIL_STATION);
01462   }
01463 
01464   Station *st = Station::GetByTile(tile);
01465   CommandCost cost = RemoveRailStation(st, flags);
01466 
01467   if (flags & DC_EXEC) st->RecomputeIndustriesNear();
01468 
01469   return cost;
01470 }
01471 
01478 static CommandCost RemoveRailWaypoint(TileIndex tile, DoCommandFlag flags)
01479 {
01480   /* if there is flooding and non-uniform stations are enabled, remove waypoints tile by tile */
01481   if (_current_company == OWNER_WATER && _settings_game.station.nonuniform_stations) {
01482     return DoCommand(tile, 0, 0, DC_EXEC, CMD_REMOVE_FROM_RAIL_WAYPOINT);
01483   }
01484 
01485   return RemoveRailStation(Waypoint::GetByTile(tile), flags);
01486 }
01487 
01488 
01494 static RoadStop **FindRoadStopSpot(bool truck_station, Station *st)
01495 {
01496   RoadStop **primary_stop = (truck_station) ? &st->truck_stops : &st->bus_stops;
01497 
01498   if (*primary_stop == NULL) {
01499     /* we have no roadstop of the type yet, so write a "primary stop" */
01500     return primary_stop;
01501   } else {
01502     /* there are stops already, so append to the end of the list */
01503     RoadStop *stop = *primary_stop;
01504     while (stop->next != NULL) stop = stop->next;
01505     return &stop->next;
01506   }
01507 }
01508 
01521 CommandCost CmdBuildRoadStop(TileIndex tile, DoCommandFlag flags, uint32 p1, uint32 p2, const char *text)
01522 {
01523   bool type = HasBit(p2, 0);
01524   bool is_drive_through = HasBit(p2, 1);
01525   bool build_over_road  = is_drive_through && IsNormalRoadTile(tile);
01526   RoadTypes rts = (RoadTypes)GB(p2, 2, 2);
01527   StationID station_to_join = GB(p2, 16, 16);
01528   bool reuse = (station_to_join != NEW_STATION);
01529   if (!reuse) station_to_join = INVALID_STATION;
01530   bool distant_join = (station_to_join != INVALID_STATION);
01531   Owner tram_owner = _current_company;
01532   Owner road_owner = _current_company;
01533 
01534   if (distant_join && (!_settings_game.station.distant_join_stations || !Station::IsValidID(station_to_join))) return CMD_ERROR;
01535 
01536   if (!AreValidRoadTypes(rts) || !HasRoadTypesAvail(_current_company, rts)) return CMD_ERROR;
01537 
01538   /* Trams only have drive through stops */
01539   if (!is_drive_through && HasBit(rts, ROADTYPE_TRAM)) return CMD_ERROR;
01540 
01541   /* Saveguard the parameters */
01542   if (!IsValidDiagDirection((DiagDirection)p1)) return CMD_ERROR;
01543   /* If it is a drive-through stop check for valid axis */
01544   if (is_drive_through && !IsValidAxis((Axis)p1)) return CMD_ERROR;
01545   /* Road bits in the wrong direction */
01546   if (build_over_road && (GetAllRoadBits(tile) & ((Axis)p1 == AXIS_X ? ROAD_Y : ROAD_X)) != 0) return_cmd_error(STR_ERROR_DRIVE_THROUGH_DIRECTION);
01547 
01548   if (!CheckIfAuthorityAllowsNewStation(tile, flags)) return CMD_ERROR;
01549 
01550   RoadTypes cur_rts = IsNormalRoadTile(tile) ? GetRoadTypes(tile) : ROADTYPES_NONE;
01551   uint num_roadbits = 0;
01552   /* Not allowed to build over this road */
01553   if (build_over_road) {
01554     /* there is a road, check if we can build road+tram stop over it */
01555     if (HasBit(cur_rts, ROADTYPE_ROAD)) {
01556       road_owner = GetRoadOwner(tile, ROADTYPE_ROAD);
01557       if (road_owner == OWNER_TOWN) {
01558         if (!_settings_game.construction.road_stop_on_town_road) return_cmd_error(STR_ERROR_DRIVE_THROUGH_ON_TOWN_ROAD);
01559       } else if (!_settings_game.construction.road_stop_on_competitor_road && road_owner != OWNER_NONE && !CheckOwnership(road_owner)) {
01560         return CMD_ERROR;
01561       }
01562       num_roadbits += CountBits(GetRoadBits(tile, ROADTYPE_ROAD));
01563     }
01564 
01565     /* there is a tram, check if we can build road+tram stop over it */
01566     if (HasBit(cur_rts, ROADTYPE_TRAM)) {
01567       tram_owner = GetRoadOwner(tile, ROADTYPE_TRAM);
01568       if (!_settings_game.construction.road_stop_on_competitor_road && tram_owner != OWNER_NONE && !CheckOwnership(tram_owner)) {
01569         return CMD_ERROR;
01570       }
01571       num_roadbits += CountBits(GetRoadBits(tile, ROADTYPE_TRAM));
01572     }
01573 
01574     /* Don't allow building the roadstop when vehicles are already driving on it */
01575     if (!EnsureNoVehicleOnGround(tile)) return CMD_ERROR;
01576 
01577     /* Do not remove roadtypes! */
01578     rts |= cur_rts;
01579   }
01580 
01581   CommandCost cost = CheckFlatLandBelow(tile, 1, 1, flags, is_drive_through ? 5 << p1 : 1 << p1, NULL, !build_over_road);
01582   if (cost.Failed()) return cost;
01583   uint roadbits_to_build = CountBits(rts) * 2 - num_roadbits;
01584   cost.AddCost(_price[PR_BUILD_ROAD] * roadbits_to_build);
01585 
01586   Station *st = NULL;
01587   CommandCost ret = FindJoiningStation(INVALID_STATION, station_to_join, HasBit(p2, 5), TileArea(tile, 1, 1), &st);
01588   if (ret.Failed()) return ret;
01589 
01590   /* Find a deleted station close to us */
01591   if (st == NULL && reuse) st = GetClosestDeletedStation(tile);
01592 
01593   /* give us a road stop in the list, and check if something went wrong */
01594   if (!RoadStop::CanAllocateItem()) return_cmd_error(type ? STR_ERROR_TOO_MANY_TRUCK_STOPS : STR_ERROR_TOO_MANY_BUS_STOPS);
01595 
01596   if (st != NULL) {
01597     if (st->owner != _current_company) {
01598       return_cmd_error(STR_ERROR_TOO_CLOSE_TO_ANOTHER_STATION);
01599     }
01600 
01601     if (!st->rect.BeforeAddTile(tile, StationRect::ADD_TEST)) return CMD_ERROR;
01602   } else {
01603     /* allocate and initialize new station */
01604     if (!Station::CanAllocateItem()) return_cmd_error(STR_ERROR_TOO_MANY_STATIONS_LOADING);
01605 
01606     if (flags & DC_EXEC) {
01607       st = new Station(tile);
01608 
01609       st->town = ClosestTownFromTile(tile, UINT_MAX);
01610       st->string_id = GenerateStationName(st, tile, STATIONNAMING_ROAD);
01611 
01612       if (Company::IsValidID(_current_company)) {
01613         SetBit(st->town->have_ratings, _current_company);
01614       }
01615     }
01616   }
01617 
01618   cost.AddCost(_price[type ? PR_BUILD_STATION_TRUCK : PR_BUILD_STATION_BUS]);
01619 
01620   if (flags & DC_EXEC) {
01621     RoadStop *road_stop = new RoadStop(tile);
01622     /* Insert into linked list of RoadStops */
01623     RoadStop **currstop = FindRoadStopSpot(type, st);
01624     *currstop = road_stop;
01625 
01626     if (type) {
01627       st->truck_station.Add(tile);
01628     } else {
01629       st->bus_station.Add(tile);
01630     }
01631 
01632     /* initialize an empty station */
01633     st->AddFacility((type) ? FACIL_TRUCK_STOP : FACIL_BUS_STOP, tile);
01634 
01635     st->rect.BeforeAddTile(tile, StationRect::ADD_TRY);
01636 
01637     RoadStopType rs_type = type ? ROADSTOP_TRUCK : ROADSTOP_BUS;
01638     if (is_drive_through) {
01639       MakeDriveThroughRoadStop(tile, st->owner, road_owner, tram_owner, st->index, rs_type, rts, (Axis)p1);
01640       road_stop->MakeDriveThrough();
01641     } else {
01642       MakeRoadStop(tile, st->owner, st->index, rs_type, rts, (DiagDirection)p1);
01643     }
01644 
01645     st->UpdateVirtCoord();
01646     UpdateStationAcceptance(st, false);
01647     st->RecomputeIndustriesNear();
01648     InvalidateWindowData(WC_SELECT_STATION, 0, 0);
01649     InvalidateWindowData(WC_STATION_LIST, st->owner, 0);
01650     SetWindowWidgetDirty(WC_STATION_VIEW, st->index, SVW_ROADVEHS);
01651   }
01652   return cost;
01653 }
01654 
01655 
01656 static Vehicle *ClearRoadStopStatusEnum(Vehicle *v, void *)
01657 {
01658   if (v->type == VEH_ROAD) {
01659     /* Okay... we are a road vehicle on a drive through road stop.
01660      * But that road stop has just been removed, so we need to make
01661      * sure we are in a valid state... however, vehicles can also
01662      * turn on road stop tiles, so only clear the 'road stop' state
01663      * bits and only when the state was 'in road stop', otherwise
01664      * we'll end up clearing the turn around bits. */
01665     RoadVehicle *rv = RoadVehicle::From(v);
01666     if (HasBit(rv->state, RVS_IN_DT_ROAD_STOP)) rv->state &= RVSB_ROAD_STOP_TRACKDIR_MASK;
01667   }
01668 
01669   return NULL;
01670 }
01671 
01672 
01679 static CommandCost RemoveRoadStop(TileIndex tile, DoCommandFlag flags)
01680 {
01681   Station *st = Station::GetByTile(tile);
01682 
01683   if (_current_company != OWNER_WATER && !CheckOwnership(st->owner)) {
01684     return CMD_ERROR;
01685   }
01686 
01687   bool is_truck = IsTruckStop(tile);
01688 
01689   RoadStop **primary_stop;
01690   RoadStop *cur_stop;
01691   if (is_truck) { // truck stop
01692     primary_stop = &st->truck_stops;
01693     cur_stop = RoadStop::GetByTile(tile, ROADSTOP_TRUCK);
01694   } else {
01695     primary_stop = &st->bus_stops;
01696     cur_stop = RoadStop::GetByTile(tile, ROADSTOP_BUS);
01697   }
01698 
01699   assert(cur_stop != NULL);
01700 
01701   /* don't do the check for drive-through road stops when company bankrupts */
01702   if (IsDriveThroughStopTile(tile) && (flags & DC_BANKRUPT)) {
01703     /* remove the 'going through road stop' status from all vehicles on that tile */
01704     if (flags & DC_EXEC) FindVehicleOnPos(tile, NULL, &ClearRoadStopStatusEnum);
01705   } else {
01706     if (!EnsureNoVehicleOnGround(tile)) return CMD_ERROR;
01707   }
01708 
01709   if (flags & DC_EXEC) {
01710     if (*primary_stop == cur_stop) {
01711       /* removed the first stop in the list */
01712       *primary_stop = cur_stop->next;
01713       /* removed the only stop? */
01714       if (*primary_stop == NULL) {
01715         st->facilities &= (is_truck ? ~FACIL_TRUCK_STOP : ~FACIL_BUS_STOP);
01716       }
01717     } else {
01718       /* tell the predecessor in the list to skip this stop */
01719       RoadStop *pred = *primary_stop;
01720       while (pred->next != cur_stop) pred = pred->next;
01721       pred->next = cur_stop->next;
01722     }
01723 
01724     if (IsDriveThroughStopTile(tile)) {
01725       /* Clears the tile for us */
01726       cur_stop->ClearDriveThrough();
01727     } else {
01728       DoClearSquare(tile);
01729     }
01730 
01731     SetWindowWidgetDirty(WC_STATION_VIEW, st->index, SVW_ROADVEHS);
01732     delete cur_stop;
01733 
01734     /* Make sure no vehicle is going to the old roadstop */
01735     RoadVehicle *v;
01736     FOR_ALL_ROADVEHICLES(v) {
01737       if (v->First() == v && v->current_order.IsType(OT_GOTO_STATION) &&
01738           v->dest_tile == tile) {
01739         v->dest_tile = v->GetOrderStationLocation(st->index);
01740       }
01741     }
01742 
01743     st->rect.AfterRemoveTile(st, tile);
01744 
01745     st->UpdateVirtCoord();
01746     st->RecomputeIndustriesNear();
01747     DeleteStationIfEmpty(st);
01748 
01749     /* Update the tile area of the truck/bus stop */
01750     if (is_truck) {
01751       st->truck_station.Clear();
01752       for (const RoadStop *rs = st->truck_stops; rs != NULL; rs = rs->next) st->truck_station.Add(rs->xy);
01753     } else {
01754       st->bus_station.Clear();
01755       for (const RoadStop *rs = st->bus_stops; rs != NULL; rs = rs->next) st->bus_station.Add(rs->xy);
01756     }
01757   }
01758 
01759   return CommandCost(EXPENSES_CONSTRUCTION, _price[is_truck ? PR_CLEAR_STATION_TRUCK : PR_CLEAR_STATION_BUS]);
01760 }
01761 
01770 CommandCost CmdRemoveRoadStop(TileIndex tile, DoCommandFlag flags, uint32 p1, uint32 p2, const char *text)
01771 {
01772   /* Make sure the specified tile is a road stop of the correct type */
01773   if (!IsTileType(tile, MP_STATION) || !IsRoadStop(tile) || (uint32)GetRoadStopType(tile) != GB(p2, 0, 1)) return CMD_ERROR;
01774 
01775   /* Save the stop info before it is removed */
01776   bool is_drive_through = IsDriveThroughStopTile(tile);
01777   RoadTypes rts = GetRoadTypes(tile);
01778   RoadBits road_bits = IsDriveThroughStopTile(tile) ?
01779       ((GetRoadStopDir(tile) == DIAGDIR_NE) ? ROAD_X : ROAD_Y) :
01780       DiagDirToRoadBits(GetRoadStopDir(tile));
01781 
01782   Owner road_owner = GetRoadOwner(tile, ROADTYPE_ROAD);
01783   Owner tram_owner = GetRoadOwner(tile, ROADTYPE_TRAM);
01784   CommandCost ret = RemoveRoadStop(tile, flags);
01785 
01786   /* If the stop was a drive-through stop replace the road */
01787   if ((flags & DC_EXEC) && ret.Succeeded() && is_drive_through) {
01788     /* Rebuild the drive throuhg road stop. As a road stop can only be
01789      * removed by the owner of the roadstop, _current_company is the
01790      * owner of the road stop. */
01791     MakeRoadNormal(tile, road_bits, rts, ClosestTownFromTile(tile, UINT_MAX)->index,
01792         road_owner, tram_owner);
01793   }
01794 
01795   return ret;
01796 }
01797 
01805 static uint GetMinimalAirportDistanceToTile(const AirportSpec *as, TileIndex town_tile, TileIndex airport_tile)
01806 {
01807   uint ttx = TileX(town_tile); // X, Y of town
01808   uint tty = TileY(town_tile);
01809 
01810   uint atx = TileX(airport_tile); // X, Y of northern airport corner
01811   uint aty = TileY(airport_tile);
01812 
01813   uint btx = TileX(airport_tile) + as->size_x - 1; // X, Y of southern corner
01814   uint bty = TileY(airport_tile) + as->size_y - 1;
01815 
01816   /* if ttx < atx, dx = atx - ttx
01817    * if atx <= ttx <= btx, dx = 0
01818    * else, dx = ttx - btx (similiar for dy) */
01819   uint dx = ttx < atx ? atx - ttx : (ttx <= btx ? 0 : ttx - btx);
01820   uint dy = tty < aty ? aty - tty : (tty <= bty ? 0 : tty - bty);
01821 
01822   return dx + dy;
01823 }
01824 
01833 uint8 GetAirportNoiseLevelForTown(const AirportSpec *as, TileIndex town_tile, TileIndex tile)
01834 {
01835   /* 0 cannot be accounted, and 1 is the lowest that can be reduced from town.
01836    * So no need to go any further*/
01837   if (as->noise_level < 2) return as->noise_level;
01838 
01839   uint distance = GetMinimalAirportDistanceToTile(as, town_tile, tile);
01840 
01841   /* The steps for measuring noise reduction are based on the "magical" (and arbitrary) 8 base distance
01842    * adding the town_council_tolerance 4 times, as a way to graduate, depending of the tolerance.
01843    * Basically, it says that the less tolerant a town is, the bigger the distance before
01844    * an actual decrease can be granted */
01845   uint8 town_tolerance_distance = 8 + (_settings_game.difficulty.town_council_tolerance * 4);
01846 
01847   /* now, we want to have the distance segmented using the distance judged bareable by town
01848    * This will give us the coefficient of reduction the distance provides. */
01849   uint noise_reduction = distance / town_tolerance_distance;
01850 
01851   /* If the noise reduction equals the airport noise itself, don't give it for free.
01852    * Otherwise, simply reduce the airport's level. */
01853   return noise_reduction >= as->noise_level ? 1 : as->noise_level - noise_reduction;
01854 }
01855 
01863 Town *AirportGetNearestTown(const AirportSpec *as, TileIndex airport_tile)
01864 {
01865   Town *t, *nearest = NULL;
01866   uint add = as->size_x + as->size_y - 2; // GetMinimalAirportDistanceToTile can differ from DistanceManhattan by this much
01867   uint mindist = UINT_MAX - add; // prevent overflow
01868   FOR_ALL_TOWNS(t) {
01869     if (DistanceManhattan(t->xy, airport_tile) < mindist + add) { // avoid calling GetMinimalAirportDistanceToTile too often
01870       uint dist = GetMinimalAirportDistanceToTile(as, t->xy, airport_tile);
01871       if (dist < mindist) {
01872         nearest = t;
01873         mindist = dist;
01874       }
01875     }
01876   }
01877 
01878   return nearest;
01879 }
01880 
01881 
01883 void UpdateAirportsNoise()
01884 {
01885   Town *t;
01886   const Station *st;
01887 
01888   FOR_ALL_TOWNS(t) t->noise_reached = 0;
01889 
01890   FOR_ALL_STATIONS(st) {
01891     if (st->airport_tile != INVALID_TILE) {
01892       const AirportSpec *as = st->GetAirportSpec();
01893       Town *nearest = AirportGetNearestTown(as, st->airport_tile);
01894       nearest->noise_reached += GetAirportNoiseLevelForTown(as, nearest->xy, st->airport_tile);
01895     }
01896   }
01897 }
01898 
01909 CommandCost CmdBuildAirport(TileIndex tile, DoCommandFlag flags, uint32 p1, uint32 p2, const char *text)
01910 {
01911   bool airport_upgrade = true;
01912   StationID station_to_join = GB(p2, 16, 16);
01913   bool reuse = (station_to_join != NEW_STATION);
01914   if (!reuse) station_to_join = INVALID_STATION;
01915   bool distant_join = (station_to_join != INVALID_STATION);
01916 
01917   if (distant_join && (!_settings_game.station.distant_join_stations || !Station::IsValidID(station_to_join))) return CMD_ERROR;
01918 
01919   if (p1 >= NUM_AIRPORTS) return CMD_ERROR;
01920 
01921   if (!CheckIfAuthorityAllowsNewStation(tile, flags)) {
01922     return CMD_ERROR;
01923   }
01924 
01925   /* Check if a valid, buildable airport was chosen for construction */
01926   const AirportSpec *as = AirportSpec::Get(p1);
01927   if (!as->IsAvailable()) return CMD_ERROR;
01928 
01929   Town *t = ClosestTownFromTile(tile, UINT_MAX);
01930   int w = as->size_x;
01931   int h = as->size_y;
01932 
01933   if (w > _settings_game.station.station_spread || h > _settings_game.station.station_spread) {
01934     _error_message = STR_ERROR_STATION_TOO_SPREAD_OUT;
01935     return CMD_ERROR;
01936   }
01937 
01938   CommandCost cost = CheckFlatLandBelow(tile, w, h, flags, 0, NULL);
01939   if (cost.Failed()) return cost;
01940 
01941   /* Go get the final noise level, that is base noise minus factor from distance to town center */
01942   Town *nearest = AirportGetNearestTown(as, tile);
01943   uint newnoise_level = GetAirportNoiseLevelForTown(as, nearest->xy, tile);
01944 
01945   /* Check if local auth would allow a new airport */
01946   StringID authority_refuse_message = STR_NULL;
01947 
01948   if (_settings_game.economy.station_noise_level) {
01949     /* do not allow to build a new airport if this raise the town noise over the maximum allowed by town */
01950     if ((nearest->noise_reached + newnoise_level) > nearest->MaxTownNoise()) {
01951       authority_refuse_message = STR_ERROR_LOCAL_AUTHORITY_REFUSES_NOISE;
01952     }
01953   } else {
01954     uint num = 0;
01955     const Station *st;
01956     FOR_ALL_STATIONS(st) {
01957       if (st->town == t && (st->facilities & FACIL_AIRPORT) && st->airport_type != AT_OILRIG) num++;
01958     }
01959     if (num >= 2) {
01960       authority_refuse_message = STR_ERROR_LOCAL_AUTHORITY_REFUSES_AIRPORT;
01961     }
01962   }
01963 
01964   if (authority_refuse_message != STR_NULL) {
01965     SetDParam(0, t->index);
01966     return_cmd_error(authority_refuse_message);
01967   }
01968 
01969   Station *st = NULL;
01970   CommandCost ret = FindJoiningStation(INVALID_STATION, station_to_join, HasBit(p2, 0), TileArea(tile, w, h), &st);
01971   if (ret.Failed()) return ret;
01972 
01973   /* Distant join */
01974   if (st == NULL && distant_join) st = Station::GetIfValid(station_to_join);
01975 
01976   /* Find a deleted station close to us */
01977   if (st == NULL && reuse) st = GetClosestDeletedStation(tile);
01978 
01979   if (st != NULL) {
01980     if (st->owner != _current_company) {
01981       return_cmd_error(STR_ERROR_TOO_CLOSE_TO_ANOTHER_STATION);
01982     }
01983 
01984     if (!st->rect.BeforeAddRect(tile, w, h, StationRect::ADD_TEST)) return CMD_ERROR;
01985 
01986     if (st->airport_tile != INVALID_TILE) {
01987       return_cmd_error(STR_ERROR_TOO_CLOSE_TO_ANOTHER_AIRPORT);
01988     }
01989   } else {
01990     airport_upgrade = false;
01991 
01992     /* allocate and initialize new station */
01993     if (!Station::CanAllocateItem()) return_cmd_error(STR_ERROR_TOO_MANY_STATIONS_LOADING);
01994 
01995     if (flags & DC_EXEC) {
01996       st = new Station(tile);
01997 
01998       st->town = t;
01999       st->string_id = GenerateStationName(st, tile, !(GetAirport(p1)->flags & AirportFTAClass::AIRPLANES) ? STATIONNAMING_HELIPORT : STATIONNAMING_AIRPORT);
02000 
02001       if (Company::IsValidID(_current_company)) {
02002         SetBit(st->town->have_ratings, _current_company);
02003       }
02004     }
02005   }
02006 
02007   cost.AddCost(_price[PR_BUILD_STATION_AIRPORT] * w * h);
02008 
02009   if (flags & DC_EXEC) {
02010     /* Always add the noise, so there will be no need to recalculate when option toggles */
02011     nearest->noise_reached += newnoise_level;
02012 
02013     st->airport_tile = tile;
02014     st->AddFacility(FACIL_AIRPORT, tile);
02015     st->airport_type = (byte)p1;
02016     st->airport_flags = 0;
02017 
02018     st->rect.BeforeAddRect(tile, w, h, StationRect::ADD_TRY);
02019 
02020     /* if airport was demolished while planes were en-route to it, the
02021      * positions can no longer be the same (v->u.air.pos), since different
02022      * airports have different indexes. So update all planes en-route to this
02023      * airport. Only update if
02024      * 1. airport is upgraded
02025      * 2. airport is added to existing station (unfortunately unavoideable)
02026      */
02027     if (airport_upgrade) UpdateAirplanesOnNewStation(st);
02028 
02029     const AirportTileTable *it = as->table[0];
02030     do {
02031       TileIndex cur_tile = tile + ToTileIndexDiff(it->ti);
02032       MakeAirport(cur_tile, st->owner, st->index, it->gfx);
02033     } while ((++it)->ti.x != -0x80);
02034 
02035     st->UpdateVirtCoord();
02036     UpdateStationAcceptance(st, false);
02037     st->RecomputeIndustriesNear();
02038     InvalidateWindowData(WC_SELECT_STATION, 0, 0);
02039     InvalidateWindowData(WC_STATION_LIST, st->owner, 0);
02040     SetWindowWidgetDirty(WC_STATION_VIEW, st->index, SVW_PLANES);
02041 
02042     if (_settings_game.economy.station_noise_level) {
02043       SetWindowDirty(WC_TOWN_VIEW, st->town->index);
02044     }
02045   }
02046 
02047   return cost;
02048 }
02049 
02056 static CommandCost RemoveAirport(TileIndex tile, DoCommandFlag flags)
02057 {
02058   Station *st = Station::GetByTile(tile);
02059 
02060   if (_current_company != OWNER_WATER && !CheckOwnership(st->owner)) {
02061     return CMD_ERROR;
02062   }
02063 
02064   tile = st->airport_tile;
02065 
02066   const AirportSpec *as = st->GetAirportSpec();
02067   int w = as->size_x;
02068   int h = as->size_y;
02069 
02070   CommandCost cost(EXPENSES_CONSTRUCTION);
02071 
02072   const Aircraft *a;
02073   FOR_ALL_AIRCRAFT(a) {
02074     if (!a->IsNormalAircraft()) continue;
02075     if (a->targetairport == st->index && a->state != FLYING) return CMD_ERROR;
02076   }
02077 
02078   TILE_LOOP(tile_cur, w, h, tile) {
02079     if (!EnsureNoVehicleOnGround(tile_cur)) return CMD_ERROR;
02080 
02081     if (!st->TileBelongsToAirport(tile_cur)) continue;
02082 
02083     cost.AddCost(_price[PR_CLEAR_STATION_AIRPORT]);
02084 
02085     if (flags & DC_EXEC) {
02086       DeleteAnimatedTile(tile_cur);
02087       DoClearSquare(tile_cur);
02088     }
02089   }
02090 
02091   if (flags & DC_EXEC) {
02092     for (uint i = 0; i < as->nof_depots; ++i) {
02093       DeleteWindowById(
02094         WC_VEHICLE_DEPOT, st->GetHangarTile(i)
02095       );
02096     }
02097 
02098     /* Go get the final noise level, that is base noise minus factor from distance to town center.
02099      * And as for construction, always remove it, even if the setting is not set, in order to avoid the
02100      * need of recalculation */
02101     Town *nearest = AirportGetNearestTown(as, tile);
02102     nearest->noise_reached -= GetAirportNoiseLevelForTown(as, nearest->xy, tile);
02103 
02104     st->rect.AfterRemoveRect(st, tile, w, h);
02105 
02106     st->airport_tile = INVALID_TILE;
02107     st->facilities &= ~FACIL_AIRPORT;
02108 
02109     SetWindowWidgetDirty(WC_STATION_VIEW, st->index, SVW_PLANES);
02110 
02111     if (_settings_game.economy.station_noise_level) {
02112       SetWindowDirty(WC_TOWN_VIEW, st->town->index);
02113     }
02114 
02115     st->UpdateVirtCoord();
02116     st->RecomputeIndustriesNear();
02117     DeleteStationIfEmpty(st);
02118   }
02119 
02120   return cost;
02121 }
02122 
02129 bool HasStationInUse(StationID station, CompanyID company)
02130 {
02131   const Vehicle *v;
02132   FOR_ALL_VEHICLES(v) {
02133     if (company == INVALID_COMPANY || v->owner == company) {
02134       const Order *order;
02135       FOR_VEHICLE_ORDERS(v, order) {
02136         if ((order->IsType(OT_GOTO_STATION) || order->IsType(OT_GOTO_WAYPOINT)) && order->GetDestination() == station) {
02137           return true;
02138         }
02139       }
02140     }
02141   }
02142   return false;
02143 }
02144 
02145 static const TileIndexDiffC _dock_tileoffs_chkaround[] = {
02146   {-1,  0},
02147   { 0,  0},
02148   { 0,  0},
02149   { 0, -1}
02150 };
02151 static const byte _dock_w_chk[4] = { 2, 1, 2, 1 };
02152 static const byte _dock_h_chk[4] = { 1, 2, 1, 2 };
02153 
02162 CommandCost CmdBuildDock(TileIndex tile, DoCommandFlag flags, uint32 p1, uint32 p2, const char *text)
02163 {
02164   StationID station_to_join = GB(p2, 16, 16);
02165   bool reuse = (station_to_join != NEW_STATION);
02166   if (!reuse) station_to_join = INVALID_STATION;
02167   bool distant_join = (station_to_join != INVALID_STATION);
02168 
02169   if (distant_join && (!_settings_game.station.distant_join_stations || !Station::IsValidID(station_to_join))) return CMD_ERROR;
02170 
02171   DiagDirection direction = GetInclinedSlopeDirection(GetTileSlope(tile, NULL));
02172   if (direction == INVALID_DIAGDIR) return_cmd_error(STR_ERROR_SITE_UNSUITABLE);
02173   direction = ReverseDiagDir(direction);
02174 
02175   /* Docks cannot be placed on rapids */
02176   if (IsWaterTile(tile)) return_cmd_error(STR_ERROR_SITE_UNSUITABLE);
02177 
02178   if (!CheckIfAuthorityAllowsNewStation(tile, flags)) return CMD_ERROR;
02179 
02180   if (MayHaveBridgeAbove(tile) && IsBridgeAbove(tile)) return_cmd_error(STR_ERROR_MUST_DEMOLISH_BRIDGE_FIRST);
02181 
02182   if (DoCommand(tile, 0, 0, flags, CMD_LANDSCAPE_CLEAR).Failed()) return CMD_ERROR;
02183 
02184   TileIndex tile_cur = tile + TileOffsByDiagDir(direction);
02185 
02186   if (!IsTileType(tile_cur, MP_WATER) || GetTileSlope(tile_cur, NULL) != SLOPE_FLAT) {
02187     return_cmd_error(STR_ERROR_SITE_UNSUITABLE);
02188   }
02189 
02190   if (MayHaveBridgeAbove(tile_cur) && IsBridgeAbove(tile_cur)) return_cmd_error(STR_ERROR_MUST_DEMOLISH_BRIDGE_FIRST);
02191 
02192   /* Get the water class of the water tile before it is cleared.*/
02193   WaterClass wc = GetWaterClass(tile_cur);
02194 
02195   if (DoCommand(tile_cur, 0, 0, flags, CMD_LANDSCAPE_CLEAR).Failed()) return CMD_ERROR;
02196 
02197   tile_cur += TileOffsByDiagDir(direction);
02198   if (!IsTileType(tile_cur, MP_WATER) || GetTileSlope(tile_cur, NULL) != SLOPE_FLAT) {
02199     return_cmd_error(STR_ERROR_SITE_UNSUITABLE);
02200   }
02201 
02202   /* middle */
02203   Station *st = NULL;
02204   CommandCost ret = FindJoiningStation(INVALID_STATION, station_to_join, HasBit(p1, 0),
02205       TileArea(tile + ToTileIndexDiff(_dock_tileoffs_chkaround[direction]),
02206           _dock_w_chk[direction], _dock_h_chk[direction]), &st);
02207   if (ret.Failed()) return ret;
02208 
02209   /* Distant join */
02210   if (st == NULL && distant_join) st = Station::GetIfValid(station_to_join);
02211 
02212   /* Find a deleted station close to us */
02213   if (st == NULL && reuse) st = GetClosestDeletedStation(tile);
02214 
02215   if (st != NULL) {
02216     if (st->owner != _current_company) {
02217       return_cmd_error(STR_ERROR_TOO_CLOSE_TO_ANOTHER_STATION);
02218     }
02219 
02220     if (!st->rect.BeforeAddRect(
02221         tile + ToTileIndexDiff(_dock_tileoffs_chkaround[direction]),
02222         _dock_w_chk[direction], _dock_h_chk[direction], StationRect::ADD_TEST)) return CMD_ERROR;
02223 
02224     if (st->dock_tile != INVALID_TILE) return_cmd_error(STR_ERROR_TOO_CLOSE_TO_ANOTHER_DOCK);
02225   } else {
02226     /* allocate and initialize new station */
02227     if (!Station::CanAllocateItem()) return_cmd_error(STR_ERROR_TOO_MANY_STATIONS_LOADING);
02228 
02229     if (flags & DC_EXEC) {
02230       st = new Station(tile);
02231 
02232       st->town = ClosestTownFromTile(tile, UINT_MAX);
02233       st->string_id = GenerateStationName(st, tile, STATIONNAMING_DOCK);
02234 
02235       if (Company::IsValidID(_current_company)) {
02236         SetBit(st->town->have_ratings, _current_company);
02237       }
02238     }
02239   }
02240 
02241   if (flags & DC_EXEC) {
02242     st->dock_tile = tile;
02243     st->AddFacility(FACIL_DOCK, tile);
02244 
02245     st->rect.BeforeAddRect(
02246         tile + ToTileIndexDiff(_dock_tileoffs_chkaround[direction]),
02247         _dock_w_chk[direction], _dock_h_chk[direction], StationRect::ADD_TRY);
02248 
02249     MakeDock(tile, st->owner, st->index, direction, wc);
02250 
02251     st->UpdateVirtCoord();
02252     UpdateStationAcceptance(st, false);
02253     st->RecomputeIndustriesNear();
02254     InvalidateWindowData(WC_SELECT_STATION, 0, 0);
02255     InvalidateWindowData(WC_STATION_LIST, st->owner, 0);
02256     SetWindowWidgetDirty(WC_STATION_VIEW, st->index, SVW_SHIPS);
02257   }
02258 
02259   return CommandCost(EXPENSES_CONSTRUCTION, _price[PR_BUILD_STATION_DOCK]);
02260 }
02261 
02268 static CommandCost RemoveDock(TileIndex tile, DoCommandFlag flags)
02269 {
02270   Station *st = Station::GetByTile(tile);
02271   if (!CheckOwnership(st->owner)) return CMD_ERROR;
02272 
02273   TileIndex tile1 = st->dock_tile;
02274   TileIndex tile2 = tile1 + TileOffsByDiagDir(GetDockDirection(tile1));
02275 
02276   if (!EnsureNoVehicleOnGround(tile1)) return CMD_ERROR;
02277   if (!EnsureNoVehicleOnGround(tile2)) return CMD_ERROR;
02278 
02279   if (flags & DC_EXEC) {
02280     DoClearSquare(tile1);
02281     MakeWaterKeepingClass(tile2, st->owner);
02282 
02283     st->rect.AfterRemoveTile(st, tile1);
02284     st->rect.AfterRemoveTile(st, tile2);
02285 
02286     MarkTileDirtyByTile(tile2);
02287 
02288     st->dock_tile = INVALID_TILE;
02289     st->facilities &= ~FACIL_DOCK;
02290 
02291     SetWindowWidgetDirty(WC_STATION_VIEW, st->index, SVW_SHIPS);
02292     st->UpdateVirtCoord();
02293     st->RecomputeIndustriesNear();
02294     DeleteStationIfEmpty(st);
02295   }
02296 
02297   return CommandCost(EXPENSES_CONSTRUCTION, _price[PR_CLEAR_STATION_DOCK]);
02298 }
02299 
02300 #include "table/station_land.h"
02301 
02302 const DrawTileSprites *GetStationTileLayout(StationType st, byte gfx)
02303 {
02304   return &_station_display_datas[st][gfx];
02305 }
02306 
02307 static void DrawTile_Station(TileInfo *ti)
02308 {
02309   const DrawTileSprites *t = NULL;
02310   RoadTypes roadtypes;
02311   int32 total_offset;
02312   int32 custom_ground_offset;
02313   uint32 relocation = 0;
02314   const BaseStation *st = NULL;
02315   const StationSpec *statspec = NULL;
02316 
02317   if (HasStationRail(ti->tile)) {
02318     const RailtypeInfo *rti = GetRailTypeInfo(GetRailType(ti->tile));
02319     roadtypes = ROADTYPES_NONE;
02320     total_offset = rti->total_offset;
02321     custom_ground_offset = rti->custom_ground_offset;
02322 
02323     if (IsCustomStationSpecIndex(ti->tile)) {
02324       /* look for customization */
02325       st = BaseStation::GetByTile(ti->tile);
02326       statspec = st->speclist[GetCustomStationSpecIndex(ti->tile)].spec;
02327 
02328       if (statspec != NULL) {
02329         uint tile = GetStationGfx(ti->tile);
02330 
02331         relocation = GetCustomStationRelocation(statspec, st, ti->tile);
02332 
02333         if (HasBit(statspec->callback_mask, CBM_STATION_SPRITE_LAYOUT)) {
02334           uint16 callback = GetStationCallback(CBID_STATION_SPRITE_LAYOUT, 0, 0, statspec, st, ti->tile);
02335           if (callback != CALLBACK_FAILED) tile = (callback & ~1) + GetRailStationAxis(ti->tile);
02336         }
02337 
02338         /* Ensure the chosen tile layout is valid for this custom station */
02339         if (statspec->renderdata != NULL) {
02340           t = &statspec->renderdata[tile < statspec->tiles ? tile : (uint)GetRailStationAxis(ti->tile)];
02341         }
02342       }
02343     }
02344   } else {
02345     roadtypes = IsRoadStop(ti->tile) ? GetRoadTypes(ti->tile) : ROADTYPES_NONE;
02346     total_offset = 0;
02347     custom_ground_offset = 0;
02348   }
02349 
02350   if (IsAirport(ti->tile)) {
02351     switch (GetStationGfx(ti->tile)) {
02352       case APT_RADAR_GRASS_FENCE_SW:
02353         t = &_station_display_datas_airport_radar_grass_fence_sw[GetStationAnimationFrame(ti->tile)];
02354         break;
02355       case APT_GRASS_FENCE_NE_FLAG:
02356         t = &_station_display_datas_airport_flag_grass_fence_ne[GetStationAnimationFrame(ti->tile)];
02357         break;
02358       case APT_RADAR_FENCE_SW:
02359         t = &_station_display_datas_airport_radar_fence_sw[GetStationAnimationFrame(ti->tile)];
02360         break;
02361       case APT_RADAR_FENCE_NE:
02362         t = &_station_display_datas_airport_radar_fence_ne[GetStationAnimationFrame(ti->tile)];
02363         break;
02364       case APT_GRASS_FENCE_NE_FLAG_2:
02365         t = &_station_display_datas_airport_flag_grass_fence_ne_2[GetStationAnimationFrame(ti->tile)];
02366         break;
02367     }
02368   }
02369 
02370   Owner owner = GetTileOwner(ti->tile);
02371 
02372   PaletteID palette;
02373   if (Company::IsValidID(owner)) {
02374     palette = COMPANY_SPRITE_COLOUR(owner);
02375   } else {
02376     /* Some stations are not owner by a company, namely oil rigs */
02377     palette = PALETTE_TO_GREY;
02378   }
02379 
02380   if (t == NULL || t->seq == NULL) t = &_station_display_datas[GetStationType(ti->tile)][GetStationGfx(ti->tile)];
02381 
02382   /* don't show foundation for docks */
02383   if (ti->tileh != SLOPE_FLAT && !IsDock(ti->tile)) {
02384     if (statspec != NULL && HasBit(statspec->flags, SSF_CUSTOM_FOUNDATIONS)) {
02385       /* Station has custom foundations. */
02386       SpriteID image = GetCustomStationFoundationRelocation(statspec, st, ti->tile);
02387 
02388       if (HasBit(statspec->flags, SSF_EXTENDED_FOUNDATIONS)) {
02389         /* Station provides extended foundations. */
02390 
02391         static const uint8 foundation_parts[] = {
02392           0, 0, 0, 0, // Invalid,  Invalid,   Invalid,   SLOPE_SW
02393           0, 1, 2, 3, // Invalid,  SLOPE_EW,  SLOPE_SE,  SLOPE_WSE
02394           0, 4, 5, 6, // Invalid,  SLOPE_NW,  SLOPE_NS,  SLOPE_NWS
02395           7, 8, 9     // SLOPE_NE, SLOPE_ENW, SLOPE_SEN
02396         };
02397 
02398         AddSortableSpriteToDraw(image + foundation_parts[ti->tileh], PAL_NONE, ti->x, ti->y, 16, 16, 7, ti->z);
02399       } else {
02400         /* Draw simple foundations, built up from 8 possible foundation sprites. */
02401 
02402         /* Each set bit represents one of the eight composite sprites to be drawn.
02403          * 'Invalid' entries will not drawn but are included for completeness. */
02404         static const uint8 composite_foundation_parts[] = {
02405           /* Invalid  (00000000), Invalid   (11010001), Invalid   (11100100), SLOPE_SW  (11100000) */
02406              0x00,                0xD1,                 0xE4,                 0xE0,
02407           /* Invalid  (11001010), SLOPE_EW  (11001001), SLOPE_SE  (11000100), SLOPE_WSE (11000000) */
02408              0xCA,                0xC9,                 0xC4,                 0xC0,
02409           /* Invalid  (11010010), SLOPE_NW  (10010001), SLOPE_NS  (11100100), SLOPE_NWS (10100000) */
02410              0xD2,                0x91,                 0xE4,                 0xA0,
02411           /* SLOPE_NE (01001010), SLOPE_ENW (00001001), SLOPE_SEN (01000100) */
02412              0x4A,                0x09,                 0x44
02413         };
02414 
02415         uint8 parts = composite_foundation_parts[ti->tileh];
02416 
02417         /* If foundations continue beyond the tile's upper sides then
02418          * mask out the last two pieces. */
02419         uint z;
02420         Slope slope = GetFoundationSlope(ti->tile, &z);
02421         if (!HasFoundationNW(ti->tile, slope, z)) ClrBit(parts, 6);
02422         if (!HasFoundationNE(ti->tile, slope, z)) ClrBit(parts, 7);
02423 
02424         StartSpriteCombine();
02425         for (int i = 0; i < 8; i++) {
02426           if (HasBit(parts, i)) {
02427             AddSortableSpriteToDraw(image + i, PAL_NONE, ti->x, ti->y, 16, 16, 7, ti->z);
02428           }
02429         }
02430         EndSpriteCombine();
02431       }
02432 
02433       OffsetGroundSprite(31, 1);
02434       ti->z += ApplyFoundationToSlope(FOUNDATION_LEVELED, &ti->tileh);
02435     } else {
02436       DrawFoundation(ti, FOUNDATION_LEVELED);
02437     }
02438   }
02439 
02440   if (IsBuoy(ti->tile) || IsDock(ti->tile) || (IsOilRig(ti->tile) && GetWaterClass(ti->tile) != WATER_CLASS_INVALID)) {
02441     if (ti->tileh == SLOPE_FLAT) {
02442       DrawWaterClassGround(ti);
02443     } else {
02444       assert(IsDock(ti->tile));
02445       TileIndex water_tile = ti->tile + TileOffsByDiagDir(GetDockDirection(ti->tile));
02446       WaterClass wc = GetWaterClass(water_tile);
02447       if (wc == WATER_CLASS_SEA) {
02448         DrawShoreTile(ti->tileh);
02449       } else {
02450         DrawClearLandTile(ti, 3);
02451       }
02452     }
02453   } else {
02454     SpriteID image = t->ground.sprite;
02455     PaletteID pal  = t->ground.pal;
02456     if (HasBit(image, SPRITE_MODIFIER_CUSTOM_SPRITE)) {
02457       image += GetCustomStationGroundRelocation(statspec, st, ti->tile);
02458       image += custom_ground_offset;
02459     } else {
02460       image += total_offset;
02461     }
02462     DrawGroundSprite(image, GroundSpritePaletteTransform(image, pal, palette));
02463 
02464     /* PBS debugging, draw reserved tracks darker */
02465     if (_game_mode != GM_MENU && _settings_client.gui.show_track_reservation && HasStationRail(ti->tile) && HasStationReservation(ti->tile)) {
02466       const RailtypeInfo *rti = GetRailTypeInfo(GetRailType(ti->tile));
02467       DrawGroundSprite(GetRailStationAxis(ti->tile) == AXIS_X ? rti->base_sprites.single_x : rti->base_sprites.single_y, PALETTE_CRASH);
02468     }
02469   }
02470 
02471   if (HasStationRail(ti->tile) && HasCatenaryDrawn(GetRailType(ti->tile)) && IsStationTileElectrifiable(ti->tile)) DrawCatenary(ti);
02472 
02473   if (HasBit(roadtypes, ROADTYPE_TRAM)) {
02474     Axis axis = GetRoadStopDir(ti->tile) == DIAGDIR_NE ? AXIS_X : AXIS_Y;
02475     DrawGroundSprite((HasBit(roadtypes, ROADTYPE_ROAD) ? SPR_TRAMWAY_OVERLAY : SPR_TRAMWAY_TRAM) + (axis ^ 1), PAL_NONE);
02476     DrawTramCatenary(ti, axis == AXIS_X ? ROAD_X : ROAD_Y);
02477   }
02478 
02479   if (IsRailWaypoint(ti->tile)) {
02480     /* Don't offset the waypoint graphics; they're always the same. */
02481     total_offset = 0;
02482   }
02483 
02484   DrawRailTileSeq(ti, t, TO_BUILDINGS, total_offset, relocation, palette);
02485 }
02486 
02487 void StationPickerDrawSprite(int x, int y, StationType st, RailType railtype, RoadType roadtype, int image)
02488 {
02489   int32 total_offset = 0;
02490   PaletteID pal = COMPANY_SPRITE_COLOUR(_local_company);
02491   const DrawTileSprites *t = &_station_display_datas[st][image];
02492 
02493   if (railtype != INVALID_RAILTYPE) {
02494     const RailtypeInfo *rti = GetRailTypeInfo(railtype);
02495     total_offset = rti->total_offset;
02496   }
02497 
02498   SpriteID img = t->ground.sprite;
02499   DrawSprite(img + total_offset, HasBit(img, PALETTE_MODIFIER_COLOUR) ? pal : PAL_NONE, x, y);
02500 
02501   if (roadtype == ROADTYPE_TRAM) {
02502     DrawSprite(SPR_TRAMWAY_TRAM + (t->ground.sprite == SPR_ROAD_PAVED_STRAIGHT_X ? 1 : 0), PAL_NONE, x, y);
02503   }
02504 
02505   /* Default waypoint has no railtype specific sprites */
02506   DrawRailTileSeqInGUI(x, y, t, st == STATION_WAYPOINT ? 0 : total_offset, 0, pal);
02507 }
02508 
02509 static uint GetSlopeZ_Station(TileIndex tile, uint x, uint y)
02510 {
02511   return GetTileMaxZ(tile);
02512 }
02513 
02514 static Foundation GetFoundation_Station(TileIndex tile, Slope tileh)
02515 {
02516   return FlatteningFoundation(tileh);
02517 }
02518 
02519 static void GetTileDesc_Station(TileIndex tile, TileDesc *td)
02520 {
02521   td->owner[0] = GetTileOwner(tile);
02522   if (IsDriveThroughStopTile(tile)) {
02523     Owner road_owner = INVALID_OWNER;
02524     Owner tram_owner = INVALID_OWNER;
02525     RoadTypes rts = GetRoadTypes(tile);
02526     if (HasBit(rts, ROADTYPE_ROAD)) road_owner = GetRoadOwner(tile, ROADTYPE_ROAD);
02527     if (HasBit(rts, ROADTYPE_TRAM)) tram_owner = GetRoadOwner(tile, ROADTYPE_TRAM);
02528 
02529     /* Is there a mix of owners? */
02530     if ((tram_owner != INVALID_OWNER && tram_owner != td->owner[0]) ||
02531         (road_owner != INVALID_OWNER && road_owner != td->owner[0])) {
02532       uint i = 1;
02533       if (road_owner != INVALID_OWNER) {
02534         td->owner_type[i] = STR_LAND_AREA_INFORMATION_ROAD_OWNER;
02535         td->owner[i] = road_owner;
02536         i++;
02537       }
02538       if (tram_owner != INVALID_OWNER) {
02539         td->owner_type[i] = STR_LAND_AREA_INFORMATION_TRAM_OWNER;
02540         td->owner[i] = tram_owner;
02541       }
02542     }
02543   }
02544   td->build_date = BaseStation::GetByTile(tile)->build_date;
02545 
02546   if (HasStationTileRail(tile)) {
02547     const StationSpec *spec = GetStationSpec(tile);
02548 
02549     if (spec != NULL) {
02550       td->station_class = GetStationClassName(spec->sclass);
02551       td->station_name  = spec->name;
02552 
02553       if (spec->grffile != NULL) {
02554         const GRFConfig *gc = GetGRFConfig(spec->grffile->grfid);
02555         td->grf = gc->name;
02556       }
02557     }
02558   }
02559 
02560   StringID str;
02561   switch (GetStationType(tile)) {
02562     default: NOT_REACHED();
02563     case STATION_RAIL:     str = STR_LAI_STATION_DESCRIPTION_RAILROAD_STATION; break;
02564     case STATION_AIRPORT:
02565       str = (IsHangar(tile) ? STR_LAI_STATION_DESCRIPTION_AIRCRAFT_HANGAR : STR_LAI_STATION_DESCRIPTION_AIRPORT);
02566       break;
02567     case STATION_TRUCK:    str = STR_LAI_STATION_DESCRIPTION_TRUCK_LOADING_AREA; break;
02568     case STATION_BUS:      str = STR_LAI_STATION_DESCRIPTION_BUS_STATION; break;
02569     case STATION_OILRIG:   str = STR_INDUSTRY_NAME_OIL_RIG; break;
02570     case STATION_DOCK:     str = STR_LAI_STATION_DESCRIPTION_SHIP_DOCK; break;
02571     case STATION_BUOY:     str = STR_LAI_STATION_DESCRIPTION_BUOY; break;
02572     case STATION_WAYPOINT: str = STR_LAI_STATION_DESCRIPTION_WAYPOINT; break;
02573   }
02574   td->str = str;
02575 }
02576 
02577 
02578 static TrackStatus GetTileTrackStatus_Station(TileIndex tile, TransportType mode, uint sub_mode, DiagDirection side)
02579 {
02580   TrackBits trackbits = TRACK_BIT_NONE;
02581 
02582   switch (mode) {
02583     case TRANSPORT_RAIL:
02584       if (HasStationRail(tile) && !IsStationTileBlocked(tile)) {
02585         trackbits = TrackToTrackBits(GetRailStationTrack(tile));
02586       }
02587       break;
02588 
02589     case TRANSPORT_WATER:
02590       /* buoy is coded as a station, it is always on open water */
02591       if (IsBuoy(tile)) {
02592         trackbits = TRACK_BIT_ALL;
02593         /* remove tracks that connect NE map edge */
02594         if (TileX(tile) == 0) trackbits &= ~(TRACK_BIT_X | TRACK_BIT_UPPER | TRACK_BIT_RIGHT);
02595         /* remove tracks that connect NW map edge */
02596         if (TileY(tile) == 0) trackbits &= ~(TRACK_BIT_Y | TRACK_BIT_LEFT | TRACK_BIT_UPPER);
02597       }
02598       break;
02599 
02600     case TRANSPORT_ROAD:
02601       if ((GetRoadTypes(tile) & sub_mode) != 0 && IsRoadStop(tile)) {
02602         DiagDirection dir = GetRoadStopDir(tile);
02603         Axis axis = DiagDirToAxis(dir);
02604 
02605         if (side != INVALID_DIAGDIR) {
02606           if (axis != DiagDirToAxis(side) || (IsStandardRoadStopTile(tile) && dir != side)) break;
02607         }
02608 
02609         trackbits = AxisToTrackBits(axis);
02610       }
02611       break;
02612 
02613     default:
02614       break;
02615   }
02616 
02617   return CombineTrackStatus(TrackBitsToTrackdirBits(trackbits), TRACKDIR_BIT_NONE);
02618 }
02619 
02620 
02621 static void TileLoop_Station(TileIndex tile)
02622 {
02623   /* FIXME -- GetTileTrackStatus_Station -> animated stationtiles
02624    * hardcoded.....not good */
02625   switch (GetStationType(tile)) {
02626     case STATION_AIRPORT:
02627       if (AirportTileSpec::Get(GetStationGfx(tile))->animation_info != 0xFFFF) {
02628         AddAnimatedTile(tile);
02629       }
02630       break;
02631 
02632     case STATION_DOCK:
02633       if (GetTileSlope(tile, NULL) != SLOPE_FLAT) break; // only handle water part
02634     /* FALL THROUGH */
02635     case STATION_OILRIG: //(station part)
02636     case STATION_BUOY:
02637       TileLoop_Water(tile);
02638       break;
02639 
02640     default: break;
02641   }
02642 }
02643 
02644 
02645 static void AnimateTile_Station(TileIndex tile)
02646 {
02647   if (HasStationRail(tile)) {
02648     AnimateStationTile(tile);
02649     return;
02650   }
02651 
02652   if (IsAirport(tile)) {
02653     const AirportTileSpec *ats = AirportTileSpec::Get(GetStationGfx(tile));
02654     uint16 mask = (1 << ats->animation_speed) - 1;
02655     if (ats->animation_info != 0xFFFF && (_tick_counter & mask) == 0) {
02656       uint8 next_frame = GetStationAnimationFrame(tile) + 1;
02657       if (next_frame >= GB(ats->animation_info, 0, 8)) next_frame = 0;
02658       SetStationAnimationFrame(tile, next_frame);
02659       MarkTileDirtyByTile(tile);
02660     }
02661   }
02662 }
02663 
02664 
02665 static bool ClickTile_Station(TileIndex tile)
02666 {
02667   const BaseStation *st = BaseStation::GetByTile(tile);
02668 
02669   if (st->facilities & FACIL_WAYPOINT) {
02670     ShowWaypointWindow(Waypoint::From(st));
02671   } else if (IsHangar(tile)) {
02672     ShowDepotWindow(tile, VEH_AIRCRAFT);
02673   } else {
02674     ShowStationViewWindow(st->index);
02675   }
02676   return true;
02677 }
02678 
02679 static VehicleEnterTileStatus VehicleEnter_Station(Vehicle *v, TileIndex tile, int x, int y)
02680 {
02681   if (v->type == VEH_TRAIN) {
02682     StationID station_id = GetStationIndex(tile);
02683     if (!v->current_order.ShouldStopAtStation(v, station_id)) return VETSB_CONTINUE;
02684     if (!IsRailStation(tile) || !Train::From(v)->IsFrontEngine()) return VETSB_CONTINUE;
02685 
02686     int station_ahead;
02687     int station_length;
02688     int stop = GetTrainStopLocation(station_id, tile, Train::From(v), &station_ahead, &station_length);
02689 
02690     /* Stop whenever that amount of station ahead + the distance from the
02691      * begin of the platform to the stop location is longer than the length
02692      * of the platform. Station ahead 'includes' the current tile where the
02693      * vehicle is on, so we need to substract that. */
02694     if (!IsInsideBS(stop + station_ahead, station_length, TILE_SIZE)) return VETSB_CONTINUE;
02695 
02696     DiagDirection dir = DirToDiagDir(v->direction);
02697 
02698     x &= 0xF;
02699     y &= 0xF;
02700 
02701     if (DiagDirToAxis(dir) != AXIS_X) Swap(x, y);
02702     if (y == TILE_SIZE / 2) {
02703       if (dir != DIAGDIR_SE && dir != DIAGDIR_SW) x = TILE_SIZE - 1 - x;
02704       stop &= TILE_SIZE - 1;
02705 
02706       if (x == stop) return VETSB_ENTERED_STATION | (VehicleEnterTileStatus)(station_id << VETS_STATION_ID_OFFSET); // enter station
02707       if (x < stop) {
02708         uint16 spd;
02709 
02710         v->vehstatus |= VS_TRAIN_SLOWING;
02711         spd = max(0, (stop - x) * 20 - 15);
02712         if (spd < v->cur_speed) v->cur_speed = spd;
02713       }
02714     }
02715   } else if (v->type == VEH_ROAD) {
02716     RoadVehicle *rv = RoadVehicle::From(v);
02717     if (rv->state < RVSB_IN_ROAD_STOP && !IsReversingRoadTrackdir((Trackdir)rv->state) && rv->frame == 0) {
02718       if (IsRoadStop(tile) && rv->IsRoadVehFront()) {
02719         /* Attempt to allocate a parking bay in a road stop */
02720         return RoadStop::GetByTile(tile, GetRoadStopType(tile))->Enter(rv) ? VETSB_CONTINUE : VETSB_CANNOT_ENTER;
02721       }
02722     }
02723   }
02724 
02725   return VETSB_CONTINUE;
02726 }
02727 
02734 static bool StationHandleBigTick(BaseStation *st)
02735 {
02736   if (!st->IsInUse() && ++st->delete_ctr >= 8) {
02737     delete st;
02738     return false;
02739   }
02740 
02741   if ((st->facilities & FACIL_WAYPOINT) == 0) UpdateStationAcceptance(Station::From(st), true);
02742 
02743   return true;
02744 }
02745 
02746 static inline void byte_inc_sat(byte *p)
02747 {
02748   byte b = *p + 1;
02749   if (b != 0) *p = b;
02750 }
02751 
02752 static void UpdateStationRating(Station *st)
02753 {
02754   bool waiting_changed = false;
02755 
02756   byte_inc_sat(&st->time_since_load);
02757   byte_inc_sat(&st->time_since_unload);
02758 
02759   const CargoSpec *cs;
02760   FOR_ALL_CARGOSPECS(cs) {
02761     GoodsEntry *ge = &st->goods[cs->Index()];
02762     /* Slowly increase the rating back to his original level in the case we
02763      *  didn't deliver cargo yet to this station. This happens when a bribe
02764      *  failed while you didn't moved that cargo yet to a station. */
02765     if (!HasBit(ge->acceptance_pickup, GoodsEntry::PICKUP) && ge->rating < INITIAL_STATION_RATING) {
02766       ge->rating++;
02767     }
02768 
02769     /* Only change the rating if we are moving this cargo */
02770     if (HasBit(ge->acceptance_pickup, GoodsEntry::PICKUP)) {
02771       byte_inc_sat(&ge->days_since_pickup);
02772 
02773       bool skip = false;
02774       int rating = 0;
02775       uint waiting = ge->cargo.Count();
02776 
02777       if (HasBit(cs->callback_mask, CBM_CARGO_STATION_RATING_CALC)) {
02778         /* Perform custom station rating. If it succeeds the speed, days in transit and
02779          * waiting cargo ratings must not be executed. */
02780 
02781         /* NewGRFs expect last speed to be 0xFF when no vehicle has arrived yet. */
02782         uint last_speed = ge->last_speed;
02783         if (last_speed == 0) last_speed = 0xFF;
02784 
02785         uint32 var18 = min(ge->days_since_pickup, 0xFF) | (min(waiting, 0xFFFF) << 8) | (min(last_speed, 0xFF) << 24);
02786         /* Convert to the 'old' vehicle types */
02787         uint32 var10 = (st->last_vehicle_type == VEH_INVALID) ? 0x0 : (st->last_vehicle_type + 0x10);
02788         uint16 callback = GetCargoCallback(CBID_CARGO_STATION_RATING_CALC, var10, var18, cs);
02789         if (callback != CALLBACK_FAILED) {
02790           skip = true;
02791           rating = GB(callback, 0, 14);
02792 
02793           /* Simulate a 15 bit signed value */
02794           if (HasBit(callback, 14)) rating -= 0x4000;
02795         }
02796       }
02797 
02798       if (!skip) {
02799         int b = ge->last_speed - 85;
02800         if (b >= 0) rating += b >> 2;
02801 
02802         byte days = ge->days_since_pickup;
02803         if (st->last_vehicle_type == VEH_SHIP) days >>= 2;
02804         (days > 21) ||
02805         (rating += 25, days > 12) ||
02806         (rating += 25, days > 6) ||
02807         (rating += 45, days > 3) ||
02808         (rating += 35, true);
02809 
02810         (rating -= 90, waiting > 1500) ||
02811         (rating += 55, waiting > 1000) ||
02812         (rating += 35, waiting > 600) ||
02813         (rating += 10, waiting > 300) ||
02814         (rating += 20, waiting > 100) ||
02815         (rating += 10, true);
02816       }
02817 
02818       if (Company::IsValidID(st->owner) && HasBit(st->town->statues, st->owner)) rating += 26;
02819 
02820       byte age = ge->last_age;
02821       (age >= 3) ||
02822       (rating += 10, age >= 2) ||
02823       (rating += 10, age >= 1) ||
02824       (rating += 13, true);
02825 
02826       {
02827         int or_ = ge->rating; // old rating
02828 
02829         /* only modify rating in steps of -2, -1, 0, 1 or 2 */
02830         ge->rating = rating = or_ + Clamp(Clamp(rating, 0, 255) - or_, -2, 2);
02831 
02832         /* if rating is <= 64 and more than 200 items waiting,
02833          * remove some random amount of goods from the station */
02834         if (rating <= 64 && waiting >= 200) {
02835           int dec = Random() & 0x1F;
02836           if (waiting < 400) dec &= 7;
02837           waiting -= dec + 1;
02838           waiting_changed = true;
02839         }
02840 
02841         /* if rating is <= 127 and there are any items waiting, maybe remove some goods. */
02842         if (rating <= 127 && waiting != 0) {
02843           uint32 r = Random();
02844           if (rating <= (int)GB(r, 0, 7)) {
02845             /* Need to have int, otherwise it will just overflow etc. */
02846             waiting = max((int)waiting - (int)GB(r, 8, 2) - 1, 0);
02847             waiting_changed = true;
02848           }
02849         }
02850 
02851         /* At some point we really must cap the cargo. Previously this
02852          * was a strict 4095, but now we'll have a less strict, but
02853          * increasingly agressive truncation of the amount of cargo. */
02854         static const uint WAITING_CARGO_THRESHOLD  = 1 << 12;
02855         static const uint WAITING_CARGO_CUT_FACTOR = 1 <<  6;
02856         static const uint MAX_WAITING_CARGO        = 1 << 15;
02857 
02858         if (waiting > WAITING_CARGO_THRESHOLD) {
02859           uint difference = waiting - WAITING_CARGO_THRESHOLD;
02860           waiting -= (difference / WAITING_CARGO_CUT_FACTOR);
02861 
02862           waiting = min(waiting, MAX_WAITING_CARGO);
02863           waiting_changed = true;
02864         }
02865 
02866         if (waiting_changed) ge->cargo.Truncate(waiting);
02867       }
02868     }
02869   }
02870 
02871   StationID index = st->index;
02872   if (waiting_changed) {
02873     SetWindowDirty(WC_STATION_VIEW, index); // update whole window
02874   } else {
02875     SetWindowWidgetDirty(WC_STATION_VIEW, index, SVW_RATINGLIST); // update only ratings list
02876   }
02877 }
02878 
02879 /* called for every station each tick */
02880 static void StationHandleSmallTick(BaseStation *st)
02881 {
02882   if ((st->facilities & FACIL_WAYPOINT) != 0 || !st->IsInUse()) return;
02883 
02884   byte b = st->delete_ctr + 1;
02885   if (b >= 185) b = 0;
02886   st->delete_ctr = b;
02887 
02888   if (b == 0) UpdateStationRating(Station::From(st));
02889 }
02890 
02891 void OnTick_Station()
02892 {
02893   if (_game_mode == GM_EDITOR) return;
02894 
02895   BaseStation *st;
02896   FOR_ALL_BASE_STATIONS(st) {
02897     StationHandleSmallTick(st);
02898 
02899     /* Run 250 tick interval trigger for station animation.
02900      * Station index is included so that triggers are not all done
02901      * at the same time. */
02902     if ((_tick_counter + st->index) % 250 == 0) {
02903       /* Stop processing this station if it was deleted */
02904       if (!StationHandleBigTick(st)) continue;
02905       StationAnimationTrigger(st, st->xy, STAT_ANIM_250_TICKS);
02906     }
02907   }
02908 }
02909 
02910 void StationMonthlyLoop()
02911 {
02912   /* not used */
02913 }
02914 
02915 
02916 void ModifyStationRatingAround(TileIndex tile, Owner owner, int amount, uint radius)
02917 {
02918   Station *st;
02919 
02920   FOR_ALL_STATIONS(st) {
02921     if (st->owner == owner &&
02922         DistanceManhattan(tile, st->xy) <= radius) {
02923       for (CargoID i = 0; i < NUM_CARGO; i++) {
02924         GoodsEntry *ge = &st->goods[i];
02925 
02926         if (ge->acceptance_pickup != 0) {
02927           ge->rating = Clamp(ge->rating + amount, 0, 255);
02928         }
02929       }
02930     }
02931   }
02932 }
02933 
02934 static void UpdateStationWaiting(Station *st, CargoID type, uint amount, SourceType source_type, SourceID source_id)
02935 {
02936   st->goods[type].cargo.Append(new CargoPacket(st->index, st->xy, amount, source_type, source_id));
02937   SetBit(st->goods[type].acceptance_pickup, GoodsEntry::PICKUP);
02938 
02939   StationAnimationTrigger(st, st->xy, STAT_ANIM_NEW_CARGO, type);
02940 
02941   SetWindowDirty(WC_STATION_VIEW, st->index);
02942   st->MarkTilesDirty(true);
02943 }
02944 
02945 static bool IsUniqueStationName(const char *name)
02946 {
02947   const Station *st;
02948 
02949   FOR_ALL_STATIONS(st) {
02950     if (st->name != NULL && strcmp(st->name, name) == 0) return false;
02951   }
02952 
02953   return true;
02954 }
02955 
02964 CommandCost CmdRenameStation(TileIndex tile, DoCommandFlag flags, uint32 p1, uint32 p2, const char *text)
02965 {
02966   Station *st = Station::GetIfValid(p1);
02967   if (st == NULL || !CheckOwnership(st->owner)) return CMD_ERROR;
02968 
02969   bool reset = StrEmpty(text);
02970 
02971   if (!reset) {
02972     if (strlen(text) >= MAX_LENGTH_STATION_NAME_BYTES) return CMD_ERROR;
02973     if (!IsUniqueStationName(text)) return_cmd_error(STR_ERROR_NAME_MUST_BE_UNIQUE);
02974   }
02975 
02976   if (flags & DC_EXEC) {
02977     free(st->name);
02978     st->name = reset ? NULL : strdup(text);
02979 
02980     st->UpdateVirtCoord();
02981     InvalidateWindowData(WC_STATION_LIST, st->owner, 1);
02982   }
02983 
02984   return CommandCost();
02985 }
02986 
02993 void FindStationsAroundTiles(const TileArea &location, StationList *stations)
02994 {
02995   /* area to search = producer plus station catchment radius */
02996   int max_rad = (_settings_game.station.modified_catchment ? MAX_CATCHMENT : CA_UNMODIFIED);
02997 
02998   for (int dy = -max_rad; dy < location.h + max_rad; dy++) {
02999     for (int dx = -max_rad; dx < location.w + max_rad; dx++) {
03000       TileIndex cur_tile = TileAddWrap(location.tile, dx, dy);
03001       if (cur_tile == INVALID_TILE || !IsTileType(cur_tile, MP_STATION)) continue;
03002 
03003       Station *st = Station::GetByTile(cur_tile);
03004       if (st == NULL) continue;
03005 
03006       if (_settings_game.station.modified_catchment) {
03007         int rad = st->GetCatchmentRadius();
03008         if (dx < -rad || dx >= rad + location.w || dy < -rad || dy >= rad + location.h) continue;
03009       }
03010 
03011       /* Insert the station in the set. This will fail if it has
03012        * already been added.
03013        */
03014       stations->Include(st);
03015     }
03016   }
03017 }
03018 
03023 const StationList *StationFinder::GetStations()
03024 {
03025   if (this->tile != INVALID_TILE) {
03026     FindStationsAroundTiles(*this, &this->stations);
03027     this->tile = INVALID_TILE;
03028   }
03029   return &this->stations;
03030 }
03031 
03032 uint MoveGoodsToStation(CargoID type, uint amount, SourceType source_type, SourceID source_id, const StationList *all_stations)
03033 {
03034   /* Return if nothing to do. Also the rounding below fails for 0. */
03035   if (amount == 0) return 0;
03036 
03037   Station *st1 = NULL;   // Station with best rating
03038   Station *st2 = NULL;   // Second best station
03039   uint best_rating1 = 0; // rating of st1
03040   uint best_rating2 = 0; // rating of st2
03041 
03042   for (Station * const *st_iter = all_stations->Begin(); st_iter != all_stations->End(); ++st_iter) {
03043     Station *st = *st_iter;
03044 
03045     /* Is the station reserved exclusively for somebody else? */
03046     if (st->town->exclusive_counter > 0 && st->town->exclusivity != st->owner) continue;
03047 
03048     if (st->goods[type].rating == 0) continue; // Lowest possible rating, better not to give cargo anymore
03049 
03050     if (_settings_game.order.selectgoods && st->goods[type].last_speed == 0) continue; // Selectively servicing stations, and not this one
03051 
03052     if (IsCargoInClass(type, CC_PASSENGERS)) {
03053       if (st->facilities == FACIL_TRUCK_STOP) continue; // passengers are never served by just a truck stop
03054     } else {
03055       if (st->facilities == FACIL_BUS_STOP) continue; // non-passengers are never served by just a bus stop
03056     }
03057 
03058     /* This station can be used, add it to st1/st2 */
03059     if (st1 == NULL || st->goods[type].rating >= best_rating1) {
03060       st2 = st1; best_rating2 = best_rating1; st1 = st; best_rating1 = st->goods[type].rating;
03061     } else if (st2 == NULL || st->goods[type].rating >= best_rating2) {
03062       st2 = st; best_rating2 = st->goods[type].rating;
03063     }
03064   }
03065 
03066   /* no stations around at all? */
03067   if (st1 == NULL) return 0;
03068 
03069   if (st2 == NULL) {
03070     /* only one station around */
03071     uint moved = amount * best_rating1 / 256 + 1;
03072     UpdateStationWaiting(st1, type, moved, source_type, source_id);
03073     return moved;
03074   }
03075 
03076   /* several stations around, the best two (highest rating) are in st1 and st2 */
03077   assert(st1 != NULL);
03078   assert(st2 != NULL);
03079   assert(best_rating1 != 0 || best_rating2 != 0);
03080 
03081   /* the 2nd highest one gets a penalty */
03082   best_rating2 >>= 1;
03083 
03084   /* amount given to station 1 */
03085   uint t = (best_rating1 * (amount + 1)) / (best_rating1 + best_rating2);
03086 
03087   uint moved = 0;
03088   if (t != 0) {
03089     moved = t * best_rating1 / 256 + 1;
03090     amount -= t;
03091     UpdateStationWaiting(st1, type, moved, source_type, source_id);
03092   }
03093 
03094   if (amount != 0) {
03095     amount = amount * best_rating2 / 256 + 1;
03096     moved += amount;
03097     UpdateStationWaiting(st2, type, amount, source_type, source_id);
03098   }
03099 
03100   return moved;
03101 }
03102 
03103 void BuildOilRig(TileIndex tile)
03104 {
03105   if (!Station::CanAllocateItem()) {
03106     DEBUG(misc, 0, "Can't allocate station for oilrig at 0x%X, reverting to oilrig only", tile);
03107     return;
03108   }
03109 
03110   Station *st = new Station(tile);
03111   st->town = ClosestTownFromTile(tile, UINT_MAX);
03112 
03113   st->string_id = GenerateStationName(st, tile, STATIONNAMING_OILRIG);
03114 
03115   assert(IsTileType(tile, MP_INDUSTRY));
03116   DeleteAnimatedTile(tile);
03117   MakeOilrig(tile, st->index, GetWaterClass(tile));
03118 
03119   st->owner = OWNER_NONE;
03120   st->airport_type = AT_OILRIG;
03121   st->airport_tile = tile;
03122   st->dock_tile = tile;
03123   st->facilities = FACIL_AIRPORT | FACIL_DOCK;
03124   st->build_date = _date;
03125 
03126   st->rect.BeforeAddTile(tile, StationRect::ADD_FORCE);
03127 
03128   for (CargoID j = 0; j < NUM_CARGO; j++) {
03129     st->goods[j].acceptance_pickup = 0;
03130     st->goods[j].days_since_pickup = 255;
03131     st->goods[j].rating = INITIAL_STATION_RATING;
03132     st->goods[j].last_speed = 0;
03133     st->goods[j].last_age = 255;
03134   }
03135 
03136   st->UpdateVirtCoord();
03137   UpdateStationAcceptance(st, false);
03138   st->RecomputeIndustriesNear();
03139 }
03140 
03141 void DeleteOilRig(TileIndex tile)
03142 {
03143   Station *st = Station::GetByTile(tile);
03144 
03145   MakeWaterKeepingClass(tile, OWNER_NONE);
03146   MarkTileDirtyByTile(tile);
03147 
03148   st->dock_tile = INVALID_TILE;
03149   st->airport_tile = INVALID_TILE;
03150   st->facilities &= ~(FACIL_AIRPORT | FACIL_DOCK);
03151   st->airport_flags = 0;
03152 
03153   st->rect.AfterRemoveTile(st, tile);
03154 
03155   st->UpdateVirtCoord();
03156   st->RecomputeIndustriesNear();
03157   if (!st->IsInUse()) delete st;
03158 }
03159 
03160 static void ChangeTileOwner_Station(TileIndex tile, Owner old_owner, Owner new_owner)
03161 {
03162   if (IsDriveThroughStopTile(tile)) {
03163     for (RoadType rt = ROADTYPE_ROAD; rt < ROADTYPE_END; rt++) {
03164       /* Update all roadtypes, no matter if they are present */
03165       if (GetRoadOwner(tile, rt) == old_owner) {
03166         SetRoadOwner(tile, rt, new_owner == INVALID_OWNER ? OWNER_NONE : new_owner);
03167       }
03168     }
03169   }
03170 
03171   if (!IsTileOwner(tile, old_owner)) return;
03172 
03173   if (new_owner != INVALID_OWNER) {
03174     /* for buoys, owner of tile is owner of water, st->owner == OWNER_NONE */
03175     SetTileOwner(tile, new_owner);
03176     InvalidateWindowClassesData(WC_STATION_LIST, 0);
03177   } else {
03178     if (IsDriveThroughStopTile(tile)) {
03179       /* Remove the drive-through road stop */
03180       DoCommand(tile, 0, (GetStationType(tile) == STATION_TRUCK) ? ROADSTOP_TRUCK : ROADSTOP_BUS, DC_EXEC | DC_BANKRUPT, CMD_REMOVE_ROAD_STOP);
03181       assert(IsTileType(tile, MP_ROAD));
03182       /* Change owner of tile and all roadtypes */
03183       ChangeTileOwner(tile, old_owner, new_owner);
03184     } else {
03185       DoCommand(tile, 0, 0, DC_EXEC | DC_BANKRUPT, CMD_LANDSCAPE_CLEAR);
03186       /* Set tile owner of water under (now removed) buoy and dock to OWNER_NONE.
03187        * Update owner of buoy if it was not removed (was in orders).
03188        * Do not update when owned by OWNER_WATER (sea and rivers). */
03189       if ((IsTileType(tile, MP_WATER) || IsBuoyTile(tile)) && IsTileOwner(tile, old_owner)) SetTileOwner(tile, OWNER_NONE);
03190     }
03191   }
03192 }
03193 
03202 static bool CanRemoveRoadWithStop(TileIndex tile, DoCommandFlag flags)
03203 {
03204   /* Yeah... water can always remove stops, right? */
03205   if (_current_company == OWNER_WATER) return true;
03206 
03207   Owner road_owner = _current_company;
03208   Owner tram_owner = _current_company;
03209 
03210   RoadTypes rts = GetRoadTypes(tile);
03211   if (HasBit(rts, ROADTYPE_ROAD)) road_owner = GetRoadOwner(tile, ROADTYPE_ROAD);
03212   if (HasBit(rts, ROADTYPE_TRAM)) tram_owner = GetRoadOwner(tile, ROADTYPE_TRAM);
03213 
03214   if ((road_owner != OWNER_TOWN && !CheckOwnership(road_owner)) || !CheckOwnership(tram_owner)) return false;
03215 
03216   return road_owner != OWNER_TOWN || CheckAllowRemoveRoad(tile, GetAnyRoadBits(tile, ROADTYPE_ROAD), OWNER_TOWN, ROADTYPE_ROAD, flags);
03217 }
03218 
03219 CommandCost ClearTile_Station(TileIndex tile, DoCommandFlag flags)
03220 {
03221   if (flags & DC_AUTO) {
03222     switch (GetStationType(tile)) {
03223       default: break;
03224       case STATION_RAIL:     return_cmd_error(STR_ERROR_MUST_DEMOLISH_RAILROAD);
03225       case STATION_WAYPOINT: return_cmd_error(STR_ERROR_BUILDING_MUST_BE_DEMOLISHED);
03226       case STATION_AIRPORT:  return_cmd_error(STR_ERROR_MUST_DEMOLISH_AIRPORT_FIRST);
03227       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);
03228       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);
03229       case STATION_BUOY:     return_cmd_error(STR_ERROR_BUOY_IN_THE_WAY);
03230       case STATION_DOCK:     return_cmd_error(STR_ERROR_MUST_DEMOLISH_DOCK_FIRST);
03231       case STATION_OILRIG:
03232         SetDParam(0, STR_INDUSTRY_NAME_OIL_RIG);
03233         return_cmd_error(STR_ERROR_UNMOVABLE_OBJECT_IN_THE_WAY);
03234     }
03235   }
03236 
03237   switch (GetStationType(tile)) {
03238     case STATION_RAIL:     return RemoveRailStation(tile, flags);
03239     case STATION_WAYPOINT: return RemoveRailWaypoint(tile, flags);
03240     case STATION_AIRPORT:  return RemoveAirport(tile, flags);
03241     case STATION_TRUCK:
03242       if (IsDriveThroughStopTile(tile) && !CanRemoveRoadWithStop(tile, flags))
03243         return_cmd_error(STR_ERROR_MUST_DEMOLISH_TRUCK_STATION_FIRST);
03244       return RemoveRoadStop(tile, flags);
03245     case STATION_BUS:
03246       if (IsDriveThroughStopTile(tile) && !CanRemoveRoadWithStop(tile, flags))
03247         return_cmd_error(STR_ERROR_MUST_DEMOLISH_BUS_STATION_FIRST);
03248       return RemoveRoadStop(tile, flags);
03249     case STATION_BUOY:     return RemoveBuoy(tile, flags);
03250     case STATION_DOCK:     return RemoveDock(tile, flags);
03251     default: break;
03252   }
03253 
03254   return CMD_ERROR;
03255 }
03256 
03257 static CommandCost TerraformTile_Station(TileIndex tile, DoCommandFlag flags, uint z_new, Slope tileh_new)
03258 {
03259   if (_settings_game.construction.build_on_slopes && AutoslopeEnabled()) {
03260     /* TODO: If you implement newgrf callback 149 'land slope check', you have to decide what to do with it here.
03261      *       TTDP does not call it.
03262      */
03263     if (!IsSteepSlope(tileh_new) && (GetTileMaxZ(tile) == z_new + GetSlopeMaxZ(tileh_new))) {
03264       switch (GetStationType(tile)) {
03265         case STATION_WAYPOINT:
03266         case STATION_RAIL: {
03267           DiagDirection direction = AxisToDiagDir(GetRailStationAxis(tile));
03268           if (!AutoslopeCheckForEntranceEdge(tile, z_new, tileh_new, direction)) break;
03269           if (!AutoslopeCheckForEntranceEdge(tile, z_new, tileh_new, ReverseDiagDir(direction))) break;
03270           return CommandCost(EXPENSES_CONSTRUCTION, _price[PR_BUILD_FOUNDATION]);
03271         }
03272 
03273         case STATION_AIRPORT:
03274           return CommandCost(EXPENSES_CONSTRUCTION, _price[PR_BUILD_FOUNDATION]);
03275 
03276         case STATION_TRUCK:
03277         case STATION_BUS: {
03278           DiagDirection direction = GetRoadStopDir(tile);
03279           if (!AutoslopeCheckForEntranceEdge(tile, z_new, tileh_new, direction)) break;
03280           if (IsDriveThroughStopTile(tile)) {
03281             if (!AutoslopeCheckForEntranceEdge(tile, z_new, tileh_new, ReverseDiagDir(direction))) break;
03282           }
03283           return CommandCost(EXPENSES_CONSTRUCTION, _price[PR_BUILD_FOUNDATION]);
03284         }
03285 
03286         default: break;
03287       }
03288     }
03289   }
03290   return DoCommand(tile, 0, 0, flags, CMD_LANDSCAPE_CLEAR);
03291 }
03292 
03293 
03294 extern const TileTypeProcs _tile_type_station_procs = {
03295   DrawTile_Station,           // draw_tile_proc
03296   GetSlopeZ_Station,          // get_slope_z_proc
03297   ClearTile_Station,          // clear_tile_proc
03298   NULL,                       // add_accepted_cargo_proc
03299   GetTileDesc_Station,        // get_tile_desc_proc
03300   GetTileTrackStatus_Station, // get_tile_track_status_proc
03301   ClickTile_Station,          // click_tile_proc
03302   AnimateTile_Station,        // animate_tile_proc
03303   TileLoop_Station,           // tile_loop_clear
03304   ChangeTileOwner_Station,    // change_tile_owner_clear
03305   NULL,                       // add_produced_cargo_proc
03306   VehicleEnter_Station,       // vehicle_enter_tile_proc
03307   GetFoundation_Station,      // get_foundation_proc
03308   TerraformTile_Station,      // terraform_tile_proc
03309 };

Generated on Thu Feb 4 17:20:28 2010 for OpenTTD by  doxygen 1.5.6