# station_cmd.cpp

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    00001 /* $Id$ */
    00002
    00003 /*
    00004  * This file is part of OpenTTD.
    00005  * OpenTTD is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, version 2.
    00006  * OpenTTD is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
    00007  * See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with OpenTTD. If not, see <http://www.gnu.org/licenses/>.
    00008  */
    00009
    00012 #include "stdafx.h"
    00013 #include "aircraft.h"
    00014 #include "bridge_map.h"
    00015 #include "cmd_helper.h"
    00016 #include "viewport_func.h"
    00017 #include "command_func.h"
    00018 #include "town.h"
    00019 #include "news_func.h"
    00020 #include "train.h"
    00021 #include "ship.h"
    00022 #include "roadveh.h"
    00023 #include "industry.h"
    00024 #include "newgrf_cargo.h"
    00025 #include "newgrf_debug.h"
    00026 #include "newgrf_station.h"
    00027 #include "newgrf_canal.h" /* For the buoy */
    00028 #include "pathfinder/yapf/yapf_cache.h"
    00029 #include "road_internal.h" /* For drawing catenary/checking road removal */
    00030 #include "autoslope.h"
    00031 #include "water.h"
    00032 #include "strings_func.h"
    00033 #include "clear_func.h"
    00034 #include "date_func.h"
    00035 #include "vehicle_func.h"
    00036 #include "string_func.h"
    00037 #include "animated_tile_func.h"
    00038 #include "elrail_func.h"
    00039 #include "station_base.h"
    00040 #include "roadstop_base.h"
    00041 #include "newgrf_railtype.h"
    00042 #include "waypoint_base.h"
    00043 #include "waypoint_func.h"
    00044 #include "pbs.h"
    00045 #include "debug.h"
    00046 #include "core/random_func.hpp"
    00047 #include "company_base.h"
    00048 #include "table/airporttile_ids.h"
    00049 #include "newgrf_airporttiles.h"
    00050 #include "order_backup.h"
    00051 #include "newgrf_house.h"
    00052 #include "company_gui.h"
    00053 #include "linkgraph/linkgraph_base.h"
    00054 #include "widgets/station_widget.h"
    00055
    00056 #include "table/strings.h"
    00057
    00064 bool IsHangar(TileIndex t)
    00065 {
    00066   assert(IsTileType(t, MP_STATION));
    00067
    00068   /* If the tile isn't an airport there's no chance it's a hangar. */
    00069   if (!IsAirport(t)) return false;
    00070
    00071   const Station *st = Station::GetByTile(t);
    00072   const AirportSpec *as = st->airport.GetSpec();
    00073
    00074   for (uint i = 0; i < as->nof_depots; i++) {
    00075     if (st->airport.GetHangarTile(i) == t) return true;
    00076   }
    00077
    00078   return false;
    00079 }
    00080
    00088 template <class T>
    00089 CommandCost GetStationAround(TileArea ta, StationID closest_station, T **st)
    00090 {
    00091   ta.tile -= TileDiffXY(1, 1);
    00092   ta.w    += 2;
    00093   ta.h    += 2;
    00094
    00095   /* check around to see if there's any stations there */
    00096   TILE_AREA_LOOP(tile_cur, ta) {
    00097     if (IsTileType(tile_cur, MP_STATION)) {
    00098       StationID t = GetStationIndex(tile_cur);
    00099       if (!T::IsValidID(t)) continue;
    00100
    00101       if (closest_station == INVALID_STATION) {
    00102         closest_station = t;
    00103       } else if (closest_station != t) {
    00104         return_cmd_error(STR_ERROR_ADJOINS_MORE_THAN_ONE_EXISTING);
    00105       }
    00106     }
    00107   }
    00108   *st = (closest_station == INVALID_STATION) ? NULL : T::Get(closest_station);
    00109   return CommandCost();
    00110 }
    00111
    00117 typedef bool (*CMSAMatcher)(TileIndex tile);
    00118
    00125 static int CountMapSquareAround(TileIndex tile, CMSAMatcher cmp)
    00126 {
    00127   int num = 0;
    00128
    00129   for (int dx = -3; dx <= 3; dx++) {
    00130     for (int dy = -3; dy <= 3; dy++) {
    00131       TileIndex t = TileAddWrap(tile, dx, dy);
    00132       if (t != INVALID_TILE && cmp(t)) num++;
    00133     }
    00134   }
    00135
    00136   return num;
    00137 }
    00138
    00144 static bool CMSAMine(TileIndex tile)
    00145 {
    00146   /* No industry */
    00147   if (!IsTileType(tile, MP_INDUSTRY)) return false;
    00148
    00149   const Industry *ind = Industry::GetByTile(tile);
    00150
    00151   /* No extractive industry */
    00152   if ((GetIndustrySpec(ind->type)->life_type & INDUSTRYLIFE_EXTRACTIVE) == 0) return false;
    00153
    00154   for (uint i = 0; i < lengthof(ind->produced_cargo); i++) {
    00155     /* The industry extracts something non-liquid, i.e. no oil or plastic, so it is a mine.
    00156      * Also the production of passengers and mail is ignored. */
    00157     if (ind->produced_cargo[i] != CT_INVALID &&
    00158         (CargoSpec::Get(ind->produced_cargo[i])->classes & (CC_LIQUID | CC_PASSENGERS | CC_MAIL)) == 0) {
    00159       return true;
    00160     }
    00161   }
    00162
    00163   return false;
    00164 }
    00165
    00171 static bool CMSAWater(TileIndex tile)
    00172 {
    00173   return IsTileType(tile, MP_WATER) && IsWater(tile);
    00174 }
    00175
    00181 static bool CMSATree(TileIndex tile)
    00182 {
    00183   return IsTileType(tile, MP_TREES);
    00184 }
    00185
    00186 #define M(x) ((x) - STR_SV_STNAME)
    00187
    00188 enum StationNaming {
    00189   STATIONNAMING_RAIL,
    00190   STATIONNAMING_ROAD,
    00191   STATIONNAMING_AIRPORT,
    00192   STATIONNAMING_OILRIG,
    00193   STATIONNAMING_DOCK,
    00194   STATIONNAMING_HELIPORT,
    00195 };
    00196
    00198 struct StationNameInformation {
    00199   uint32 free_names;
    00200   bool *indtypes;
    00201 };
    00202
    00211 static bool FindNearIndustryName(TileIndex tile, void *user_data)
    00212 {
    00213   /* All already found industry types */
    00214   StationNameInformation *sni = (StationNameInformation*)user_data;
    00215   if (!IsTileType(tile, MP_INDUSTRY)) return false;
    00216
    00217   /* If the station name is undefined it means that it doesn't name a station */
    00218   IndustryType indtype = GetIndustryType(tile);
    00219   if (GetIndustrySpec(indtype)->station_name == STR_UNDEFINED) return false;
    00220
    00221   /* In all cases if an industry that provides a name is found two of
    00222    * the standard names will be disabled. */
    00223   sni->free_names &= ~(1 << M(STR_SV_STNAME_OILFIELD) | 1 << M(STR_SV_STNAME_MINES));
    00224   return !sni->indtypes[indtype];
    00225 }
    00226
    00227 static StringID GenerateStationName(Station *st, TileIndex tile, StationNaming name_class)
    00228 {
    00229   static const uint32 _gen_station_name_bits[] = {
    00230     0,                                       // STATIONNAMING_RAIL
    00231     0,                                       // STATIONNAMING_ROAD
    00232     1U << M(STR_SV_STNAME_AIRPORT),          // STATIONNAMING_AIRPORT
    00233     1U << M(STR_SV_STNAME_OILFIELD),         // STATIONNAMING_OILRIG
    00234     1U << M(STR_SV_STNAME_DOCKS),            // STATIONNAMING_DOCK
    00235     1U << M(STR_SV_STNAME_HELIPORT),         // STATIONNAMING_HELIPORT
    00236   };
    00237
    00238   const Town *t = st->town;
    00239   uint32 free_names = UINT32_MAX;
    00240
    00241   bool indtypes[NUM_INDUSTRYTYPES];
    00242   memset(indtypes, 0, sizeof(indtypes));
    00243
    00244   const Station *s;
    00245   FOR_ALL_STATIONS(s) {
    00246     if (s != st && s->town == t) {
    00247       if (s->indtype != IT_INVALID) {
    00248         indtypes[s->indtype] = true;
    00249         continue;
    00250       }
    00251       uint str = M(s->string_id);
    00252       if (str <= 0x20) {
    00253         if (str == M(STR_SV_STNAME_FOREST)) {
    00254           str = M(STR_SV_STNAME_WOODS);
    00255         }
    00256         ClrBit(free_names, str);
    00257       }
    00258     }
    00259   }
    00260
    00261   TileIndex indtile = tile;
    00262   StationNameInformation sni = { free_names, indtypes };
    00263   if (CircularTileSearch(&indtile, 7, FindNearIndustryName, &sni)) {
    00264     /* An industry has been found nearby */
    00265     IndustryType indtype = GetIndustryType(indtile);
    00266     const IndustrySpec *indsp = GetIndustrySpec(indtype);
    00267     /* STR_NULL means it only disables oil rig/mines */
    00268     if (indsp->station_name != STR_NULL) {
    00269       st->indtype = indtype;
    00270       return STR_SV_STNAME_FALLBACK;
    00271     }
    00272   }
    00273
    00274   /* Oil rigs/mines name could be marked not free by looking for a near by industry. */
    00275   free_names = sni.free_names;
    00276
    00277   /* check default names */
    00278   uint32 tmp = free_names & _gen_station_name_bits[name_class];
    00279   if (tmp != 0) return STR_SV_STNAME + FindFirstBit(tmp);
    00280
    00281   /* check mine? */
    00282   if (HasBit(free_names, M(STR_SV_STNAME_MINES))) {
    00283     if (CountMapSquareAround(tile, CMSAMine) >= 2) {
    00284       return STR_SV_STNAME_MINES;
    00285     }
    00286   }
    00287
    00288   /* check close enough to town to get central as name? */
    00289   if (DistanceMax(tile, t->xy) < 8) {
    00290     if (HasBit(free_names, M(STR_SV_STNAME))) return STR_SV_STNAME;
    00291
    00292     if (HasBit(free_names, M(STR_SV_STNAME_CENTRAL))) return STR_SV_STNAME_CENTRAL;
    00293   }
    00294
    00295   /* Check lakeside */
    00296   if (HasBit(free_names, M(STR_SV_STNAME_LAKESIDE)) &&
    00297       DistanceFromEdge(tile) < 20 &&
    00298       CountMapSquareAround(tile, CMSAWater) >= 5) {
    00299     return STR_SV_STNAME_LAKESIDE;
    00300   }
    00301
    00302   /* Check woods */
    00303   if (HasBit(free_names, M(STR_SV_STNAME_WOODS)) && (
    00304         CountMapSquareAround(tile, CMSATree) >= 8 ||
    00305         CountMapSquareAround(tile, IsTileForestIndustry) >= 2)
    00306       ) {
    00307     return _settings_game.game_creation.landscape == LT_TROPIC ? STR_SV_STNAME_FOREST : STR_SV_STNAME_WOODS;
    00308   }
    00309
    00310   /* check elevation compared to town */
    00311   int z = GetTileZ(tile);
    00312   int z2 = GetTileZ(t->xy);
    00313   if (z < z2) {
    00314     if (HasBit(free_names, M(STR_SV_STNAME_VALLEY))) return STR_SV_STNAME_VALLEY;
    00315   } else if (z > z2) {
    00316     if (HasBit(free_names, M(STR_SV_STNAME_HEIGHTS))) return STR_SV_STNAME_HEIGHTS;
    00317   }
    00318
    00319   /* check direction compared to town */
    00320   static const int8 _direction_and_table[] = {
    00321     ~( (1 << M(STR_SV_STNAME_WEST))  | (1 << M(STR_SV_STNAME_EAST)) | (1 << M(STR_SV_STNAME_NORTH)) ),
    00322     ~( (1 << M(STR_SV_STNAME_SOUTH)) | (1 << M(STR_SV_STNAME_WEST)) | (1 << M(STR_SV_STNAME_NORTH)) ),
    00323     ~( (1 << M(STR_SV_STNAME_SOUTH)) | (1 << M(STR_SV_STNAME_EAST)) | (1 << M(STR_SV_STNAME_NORTH)) ),
    00324     ~( (1 << M(STR_SV_STNAME_SOUTH)) | (1 << M(STR_SV_STNAME_WEST)) | (1 << M(STR_SV_STNAME_EAST)) ),
    00325   };
    00326
    00327   free_names &= _direction_and_table[
    00328     (TileX(tile) < TileX(t->xy)) +
    00329     (TileY(tile) < TileY(t->xy)) * 2];
    00330
    00331   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));
    00332   return (tmp == 0) ? STR_SV_STNAME_FALLBACK : (STR_SV_STNAME + FindFirstBit(tmp));
    00333 }
    00334 #undef M
    00335
    00341 static Station *GetClosestDeletedStation(TileIndex tile)
    00342 {
    00343   uint threshold = 8;
    00344   Station *best_station = NULL;
    00345   Station *st;
    00346
    00347   FOR_ALL_STATIONS(st) {
    00348     if (!st->IsInUse() && st->owner == _current_company) {
    00349       uint cur_dist = DistanceManhattan(tile, st->xy);
    00350
    00351       if (cur_dist < threshold) {
    00352         threshold = cur_dist;
    00353         best_station = st;
    00354       }
    00355     }
    00356   }
    00357
    00358   return best_station;
    00359 }
    00360
    00361
    00362 void Station::GetTileArea(TileArea *ta, StationType type) const
    00363 {
    00364   switch (type) {
    00365     case STATION_RAIL:
    00366       *ta = this->train_station;
    00367       return;
    00368
    00369     case STATION_AIRPORT:
    00370       *ta = this->airport;
    00371       return;
    00372
    00373     case STATION_TRUCK:
    00374       *ta = this->truck_station;
    00375       return;
    00376
    00377     case STATION_BUS:
    00378       *ta = this->bus_station;
    00379       return;
    00380
    00381     case STATION_DOCK:
    00382     case STATION_OILRIG:
    00383       ta->tile = this->dock_tile;
    00384       break;
    00385
    00386     default: NOT_REACHED();
    00387   }
    00388
    00389   ta->w = 1;
    00390   ta->h = 1;
    00391 }
    00392
    00396 void Station::UpdateVirtCoord()
    00397 {
    00398   Point pt = RemapCoords2(TileX(this->xy) * TILE_SIZE, TileY(this->xy) * TILE_SIZE);
    00399
    00400   pt.y -= 32 * ZOOM_LVL_BASE;
    00401   if ((this->facilities & FACIL_AIRPORT) && this->airport.type == AT_OILRIG) pt.y -= 16 * ZOOM_LVL_BASE;
    00402
    00403   SetDParam(0, this->index);
    00404   SetDParam(1, this->facilities);
    00405   this->sign.UpdatePosition(pt.x, pt.y, STR_VIEWPORT_STATION);
    00406
    00407   SetWindowDirty(WC_STATION_VIEW, this->index);
    00408 }
    00409
    00411 void UpdateAllStationVirtCoords()
    00412 {
    00413   BaseStation *st;
    00414
    00415   FOR_ALL_BASE_STATIONS(st) {
    00416     st->UpdateVirtCoord();
    00417   }
    00418 }
    00419
    00425 static uint GetAcceptanceMask(const Station *st)
    00426 {
    00427   uint mask = 0;
    00428
    00429   for (CargoID i = 0; i < NUM_CARGO; i++) {
    00430     if (HasBit(st->goods[i].acceptance_pickup, GoodsEntry::GES_ACCEPTANCE)) mask |= 1 << i;
    00431   }
    00432   return mask;
    00433 }
    00434
    00439 static void ShowRejectOrAcceptNews(const Station *st, uint num_items, CargoID *cargo, StringID msg)
    00440 {
    00441   for (uint i = 0; i < num_items; i++) {
    00442     SetDParam(i + 1, CargoSpec::Get(cargo[i])->name);
    00443   }
    00444
    00445   SetDParam(0, st->index);
    00446   AddNewsItem(msg, NT_ACCEPTANCE, NF_INCOLOUR | NF_SMALL, NR_STATION, st->index);
    00447 }
    00448
    00456 CargoArray GetProductionAroundTiles(TileIndex tile, int w, int h, int rad)
    00457 {
    00458   CargoArray produced;
    00459
    00460   int x = TileX(tile);
    00461   int y = TileY(tile);
    00462
    00463   /* expand the region by rad tiles on each side
    00464    * while making sure that we remain inside the board. */
    00465   int x2 = min(x + w + rad, MapSizeX());
    00466   int x1 = max(x - rad, 0);
    00467
    00468   int y2 = min(y + h + rad, MapSizeY());
    00469   int y1 = max(y - rad, 0);
    00470
    00471   assert(x1 < x2);
    00472   assert(y1 < y2);
    00473   assert(w > 0);
    00474   assert(h > 0);
    00475
    00476   TileArea ta(TileXY(x1, y1), TileXY(x2 - 1, y2 - 1));
    00477
    00478   /* Loop over all tiles to get the produced cargo of
    00479    * everything except industries */
    00480   TILE_AREA_LOOP(tile, ta) AddProducedCargo(tile, produced);
    00481
    00482   /* Loop over the industries. They produce cargo for
    00483    * anything that is within 'rad' from their bounding
    00484    * box. As such if you have e.g. a oil well the tile
    00485    * area loop might not hit an industry tile while
    00486    * the industry would produce cargo for the station.
    00487    */
    00488   const Industry *i;
    00489   FOR_ALL_INDUSTRIES(i) {
    00490     if (!ta.Intersects(i->location)) continue;
    00491
    00492     for (uint j = 0; j < lengthof(i->produced_cargo); j++) {
    00493       CargoID cargo = i->produced_cargo[j];
    00494       if (cargo != CT_INVALID) produced[cargo]++;
    00495     }
    00496   }
    00497
    00498   return produced;
    00499 }
    00500
    00509 CargoArray GetAcceptanceAroundTiles(TileIndex tile, int w, int h, int rad, uint32 *always_accepted)
    00510 {
    00511   CargoArray acceptance;
    00512   if (always_accepted != NULL) *always_accepted = 0;
    00513
    00514   int x = TileX(tile);
    00515   int y = TileY(tile);
    00516
    00517   /* expand the region by rad tiles on each side
    00518    * while making sure that we remain inside the board. */
    00519   int x2 = min(x + w + rad, MapSizeX());
    00520   int y2 = min(y + h + rad, MapSizeY());
    00521   int x1 = max(x - rad, 0);
    00522   int y1 = max(y - rad, 0);
    00523
    00524   assert(x1 < x2);
    00525   assert(y1 < y2);
    00526   assert(w > 0);
    00527   assert(h > 0);
    00528
    00529   for (int yc = y1; yc != y2; yc++) {
    00530     for (int xc = x1; xc != x2; xc++) {
    00531       TileIndex tile = TileXY(xc, yc);
    00532       AddAcceptedCargo(tile, acceptance, always_accepted);
    00533     }
    00534   }
    00535
    00536   return acceptance;
    00537 }
    00538
    00544 void UpdateStationAcceptance(Station *st, bool show_msg)
    00545 {
    00546   /* old accepted goods types */
    00547   uint old_acc = GetAcceptanceMask(st);
    00548
    00549   /* And retrieve the acceptance. */
    00550   CargoArray acceptance;
    00551   if (!st->rect.IsEmpty()) {
    00552     acceptance = GetAcceptanceAroundTiles(
    00553       TileXY(st->rect.left, st->rect.top),
    00554       st->rect.right  - st->rect.left + 1,
    00555       st->rect.bottom - st->rect.top  + 1,
    00556       st->GetCatchmentRadius(),
    00557       &st->always_accepted
    00558     );
    00559   }
    00560
    00561   /* Adjust in case our station only accepts fewer kinds of goods */
    00562   for (CargoID i = 0; i < NUM_CARGO; i++) {
    00563     uint amt = acceptance[i];
    00564
    00565     /* Make sure the station can accept the goods type. */
    00566     bool is_passengers = IsCargoInClass(i, CC_PASSENGERS);
    00567     if ((!is_passengers && !(st->facilities & ~FACIL_BUS_STOP)) ||
    00568         (is_passengers && !(st->facilities & ~FACIL_TRUCK_STOP))) {
    00569       amt = 0;
    00570     }
    00571
    00572     GoodsEntry &ge = st->goods[i];
    00573     SB(ge.acceptance_pickup, GoodsEntry::GES_ACCEPTANCE, 1, amt >= 8);
    00574     if (LinkGraph::IsValidID(ge.link_graph)) {
    00575       (*LinkGraph::Get(ge.link_graph))[ge.node].SetDemand(amt / 8);
    00576     }
    00577   }
    00578
    00579   /* Only show a message in case the acceptance was actually changed. */
    00580   uint new_acc = GetAcceptanceMask(st);
    00581   if (old_acc == new_acc) return;
    00582
    00583   /* show a message to report that the acceptance was changed? */
    00584   if (show_msg && st->owner == _local_company && st->IsInUse()) {
    00585     /* List of accept and reject strings for different number of
    00586      * cargo types */
    00587     static const StringID accept_msg[] = {
    00588       STR_NEWS_STATION_NOW_ACCEPTS_CARGO,
    00589       STR_NEWS_STATION_NOW_ACCEPTS_CARGO_AND_CARGO,
    00590     };
    00591     static const StringID reject_msg[] = {
    00592       STR_NEWS_STATION_NO_LONGER_ACCEPTS_CARGO,
    00593       STR_NEWS_STATION_NO_LONGER_ACCEPTS_CARGO_OR_CARGO,
    00594     };
    00595
    00596     /* Array of accepted and rejected cargo types */
    00597     CargoID accepts[2] = { CT_INVALID, CT_INVALID };
    00598     CargoID rejects[2] = { CT_INVALID, CT_INVALID };
    00599     uint num_acc = 0;
    00600     uint num_rej = 0;
    00601
    00602     /* Test each cargo type to see if its acceptance has changed */
    00603     for (CargoID i = 0; i < NUM_CARGO; i++) {
    00604       if (HasBit(new_acc, i)) {
    00605         if (!HasBit(old_acc, i) && num_acc < lengthof(accepts)) {
    00606           /* New cargo is accepted */
    00607           accepts[num_acc++] = i;
    00608         }
    00609       } else {
    00610         if (HasBit(old_acc, i) && num_rej < lengthof(rejects)) {
    00611           /* Old cargo is no longer accepted */
    00612           rejects[num_rej++] = i;
    00613         }
    00614       }
    00615     }
    00616
    00617     /* Show news message if there are any changes */
    00618     if (num_acc > 0) ShowRejectOrAcceptNews(st, num_acc, accepts, accept_msg[num_acc - 1]);
    00619     if (num_rej > 0) ShowRejectOrAcceptNews(st, num_rej, rejects, reject_msg[num_rej - 1]);
    00620   }
    00621
    00622   /* redraw the station view since acceptance changed */
    00623   SetWindowWidgetDirty(WC_STATION_VIEW, st->index, WID_SV_ACCEPT_RATING_LIST);
    00624 }
    00625
    00626 static void UpdateStationSignCoord(BaseStation *st)
    00627 {
    00628   const StationRect *r = &st->rect;
    00629
    00630   if (r->IsEmpty()) return; // no tiles belong to this station
    00631
    00632   /* clamp sign coord to be inside the station rect */
    00633   st->xy = TileXY(ClampU(TileX(st->xy), r->left, r->right), ClampU(TileY(st->xy), r->top, r->bottom));
    00634   st->UpdateVirtCoord();
    00635 }
    00636
    00646 static CommandCost BuildStationPart(Station **st, DoCommandFlag flags, bool reuse, TileArea area, StationNaming name_class)
    00647 {
    00648   /* Find a deleted station close to us */
    00649   if (*st == NULL && reuse) *st = GetClosestDeletedStation(area.tile);
    00650
    00651   if (*st != NULL) {
    00652     if ((*st)->owner != _current_company) {
    00653       return_cmd_error(STR_ERROR_TOO_CLOSE_TO_ANOTHER_STATION);
    00654     }
    00655
    00656     CommandCost ret = (*st)->rect.BeforeAddRect(area.tile, area.w, area.h, StationRect::ADD_TEST);
    00657     if (ret.Failed()) return ret;
    00658   } else {
    00659     /* allocate and initialize new station */
    00660     if (!Station::CanAllocateItem()) return_cmd_error(STR_ERROR_TOO_MANY_STATIONS_LOADING);
    00661
    00662     if (flags & DC_EXEC) {
    00663       *st = new Station(area.tile);
    00664
    00665       (*st)->town = ClosestTownFromTile(area.tile, UINT_MAX);
    00666       (*st)->string_id = GenerateStationName(*st, area.tile, name_class);
    00667
    00668       if (Company::IsValidID(_current_company)) {
    00669         SetBit((*st)->town->have_ratings, _current_company);
    00670       }
    00671     }
    00672   }
    00673   return CommandCost();
    00674 }
    00675
    00682 static void DeleteStationIfEmpty(BaseStation *st)
    00683 {
    00684   if (!st->IsInUse()) {
    00685     st->delete_ctr = 0;
    00686     InvalidateWindowData(WC_STATION_LIST, st->owner, 0);
    00687   }
    00688   /* station remains but it probably lost some parts - station sign should stay in the station boundaries */
    00689   UpdateStationSignCoord(st);
    00690 }
    00691
    00692 CommandCost ClearTile_Station(TileIndex tile, DoCommandFlag flags);
    00693
    00703 CommandCost CheckBuildableTile(TileIndex tile, uint invalid_dirs, int &allowed_z, bool allow_steep, bool check_bridge = true)
    00704 {
    00705   if (check_bridge && MayHaveBridgeAbove(tile) && IsBridgeAbove(tile)) {
    00706     return_cmd_error(STR_ERROR_MUST_DEMOLISH_BRIDGE_FIRST);
    00707   }
    00708
    00709   CommandCost ret = EnsureNoVehicleOnGround(tile);
    00710   if (ret.Failed()) return ret;
    00711
    00712   int z;
    00713   Slope tileh = GetTileSlope(tile, &z);
    00714
    00715   /* Prohibit building if
    00716    *   1) The tile is "steep" (i.e. stretches two height levels).
    00717    *   2) The tile is non-flat and the build_on_slopes switch is disabled.
    00718    */
    00719   if ((!allow_steep && IsSteepSlope(tileh)) ||
    00720       ((!_settings_game.construction.build_on_slopes) && tileh != SLOPE_FLAT)) {
    00721     return_cmd_error(STR_ERROR_FLAT_LAND_REQUIRED);
    00722   }
    00723
    00724   CommandCost cost(EXPENSES_CONSTRUCTION);
    00725   int flat_z = z + GetSlopeMaxZ(tileh);
    00726   if (tileh != SLOPE_FLAT) {
    00727     /* Forbid building if the tile faces a slope in a invalid direction. */
    00728     for (DiagDirection dir = DIAGDIR_BEGIN; dir != DIAGDIR_END; dir++) {
    00729       if (HasBit(invalid_dirs, dir) && !CanBuildDepotByTileh(dir, tileh)) {
    00730         return_cmd_error(STR_ERROR_FLAT_LAND_REQUIRED);
    00731       }
    00732     }
    00733     cost.AddCost(_price[PR_BUILD_FOUNDATION]);
    00734   }
    00735
    00736   /* The level of this tile must be equal to allowed_z. */
    00737   if (allowed_z < 0) {
    00738     /* First tile. */
    00739     allowed_z = flat_z;
    00740   } else if (allowed_z != flat_z) {
    00741     return_cmd_error(STR_ERROR_FLAT_LAND_REQUIRED);
    00742   }
    00743
    00744   return cost;
    00745 }
    00746
    00753 CommandCost CheckFlatLand(TileArea tile_area, DoCommandFlag flags)
    00754 {
    00755   CommandCost cost(EXPENSES_CONSTRUCTION);
    00756   int allowed_z = -1;
    00757
    00758   TILE_AREA_LOOP(tile_cur, tile_area) {
    00759     CommandCost ret = CheckBuildableTile(tile_cur, 0, allowed_z, true);
    00760     if (ret.Failed()) return ret;
    00761     cost.AddCost(ret);
    00762
    00763     ret = DoCommand(tile_cur, 0, 0, flags, CMD_LANDSCAPE_CLEAR);
    00764     if (ret.Failed()) return ret;
    00765     cost.AddCost(ret);
    00766   }
    00767
    00768   return cost;
    00769 }
    00770
    00785 static CommandCost CheckFlatLandRailStation(TileArea tile_area, DoCommandFlag flags, Axis axis, StationID *station, RailType rt, SmallVector<Train *, 4> &affected_vehicles, StationClassID spec_class, byte spec_index, byte plat_len, byte numtracks)
    00786 {
    00787   CommandCost cost(EXPENSES_CONSTRUCTION);
    00788   int allowed_z = -1;
    00789   uint invalid_dirs = 5 << axis;
    00790
    00791   const StationSpec *statspec = StationClass::Get(spec_class)->GetSpec(spec_index);
    00792   bool slope_cb = statspec != NULL && HasBit(statspec->callback_mask, CBM_STATION_SLOPE_CHECK);
    00793
    00794   TILE_AREA_LOOP(tile_cur, tile_area) {
    00795     CommandCost ret = CheckBuildableTile(tile_cur, invalid_dirs, allowed_z, false);
    00796     if (ret.Failed()) return ret;
    00797     cost.AddCost(ret);
    00798
    00799     if (slope_cb) {
    00800       /* Do slope check if requested. */
    00801       ret = PerformStationTileSlopeCheck(tile_area.tile, tile_cur, statspec, axis, plat_len, numtracks);
    00802       if (ret.Failed()) return ret;
    00803     }
    00804
    00805     /* if station is set, then we have special handling to allow building on top of already existing stations.
    00806      * so station points to INVALID_STATION if we can build on any station.
    00807      * Or it points to a station if we're only allowed to build on exactly that station. */
    00808     if (station != NULL && IsTileType(tile_cur, MP_STATION)) {
    00809       if (!IsRailStation(tile_cur)) {
    00810         return ClearTile_Station(tile_cur, DC_AUTO); // get error message
    00811       } else {
    00812         StationID st = GetStationIndex(tile_cur);
    00813         if (*station == INVALID_STATION) {
    00814           *station = st;
    00815         } else if (*station != st) {
    00816           return_cmd_error(STR_ERROR_ADJOINS_MORE_THAN_ONE_EXISTING);
    00817         }
    00818       }
    00819     } else {
    00820       /* Rail type is only valid when building a railway station; if station to
    00821        * build isn't a rail station it's INVALID_RAILTYPE. */
    00822       if (rt != INVALID_RAILTYPE &&
    00823           IsPlainRailTile(tile_cur) && !HasSignals(tile_cur) &&
    00824           HasPowerOnRail(GetRailType(tile_cur), rt)) {
    00825         /* Allow overbuilding if the tile:
    00826          *  - has rail, but no signals
    00827          *  - it has exactly one track
    00828          *  - the track is in line with the station
    00829          *  - the current rail type has power on the to-be-built type (e.g. convert normal rail to el rail)
    00830          */
    00831         TrackBits tracks = GetTrackBits(tile_cur);
    00832         Track track = RemoveFirstTrack(&tracks);
    00833         Track expected_track = HasBit(invalid_dirs, DIAGDIR_NE) ? TRACK_X : TRACK_Y;
    00834
    00835         if (tracks == TRACK_BIT_NONE && track == expected_track) {
    00836           /* Check for trains having a reservation for this tile. */
    00837           if (HasBit(GetRailReservationTrackBits(tile_cur), track)) {
    00838             Train *v = GetTrainForReservation(tile_cur, track);
    00839             if (v != NULL) {
    00840               *affected_vehicles.Append() = v;
    00841             }
    00842           }
    00843           CommandCost ret = DoCommand(tile_cur, 0, track, flags, CMD_REMOVE_SINGLE_RAIL);
    00844           if (ret.Failed()) return ret;
    00845           cost.AddCost(ret);
    00846           /* With flags & ~DC_EXEC CmdLandscapeClear would fail since the rail still exists */
    00847           continue;
    00848         }
    00849       }
    00850       ret = DoCommand(tile_cur, 0, 0, flags, CMD_LANDSCAPE_CLEAR);
    00851       if (ret.Failed()) return ret;
    00852       cost.AddCost(ret);
    00853     }
    00854   }
    00855
    00856   return cost;
    00857 }
    00858
    00871 static CommandCost CheckFlatLandRoadStop(TileArea tile_area, DoCommandFlag flags, uint invalid_dirs, bool is_drive_through, bool is_truck_stop, Axis axis, StationID *station, RoadTypes rts)
    00872 {
    00873   CommandCost cost(EXPENSES_CONSTRUCTION);
    00874   int allowed_z = -1;
    00875
    00876   TILE_AREA_LOOP(cur_tile, tile_area) {
    00877     CommandCost ret = CheckBuildableTile(cur_tile, invalid_dirs, allowed_z, !is_drive_through);
    00878     if (ret.Failed()) return ret;
    00879     cost.AddCost(ret);
    00880
    00881     /* If station is set, then we have special handling to allow building on top of already existing stations.
    00882      * Station points to INVALID_STATION if we can build on any station.
    00883      * Or it points to a station if we're only allowed to build on exactly that station. */
    00884     if (station != NULL && IsTileType(cur_tile, MP_STATION)) {
    00885       if (!IsRoadStop(cur_tile)) {
    00886         return ClearTile_Station(cur_tile, DC_AUTO); // Get error message.
    00887       } else {
    00888         if (is_truck_stop != IsTruckStop(cur_tile) ||
    00889             is_drive_through != IsDriveThroughStopTile(cur_tile)) {
    00890           return ClearTile_Station(cur_tile, DC_AUTO); // Get error message.
    00891         }
    00892         /* Drive-through station in the wrong direction. */
    00893         if (is_drive_through && IsDriveThroughStopTile(cur_tile) && DiagDirToAxis(GetRoadStopDir(cur_tile)) != axis){
    00894           return_cmd_error(STR_ERROR_DRIVE_THROUGH_DIRECTION);
    00895         }
    00896         StationID st = GetStationIndex(cur_tile);
    00897         if (*station == INVALID_STATION) {
    00898           *station = st;
    00899         } else if (*station != st) {
    00900           return_cmd_error(STR_ERROR_ADJOINS_MORE_THAN_ONE_EXISTING);
    00901         }
    00902       }
    00903     } else {
    00904       bool build_over_road = is_drive_through && IsNormalRoadTile(cur_tile);
    00905       /* Road bits in the wrong direction. */
    00906       RoadBits rb = IsNormalRoadTile(cur_tile) ? GetAllRoadBits(cur_tile) : ROAD_NONE;
    00907       if (build_over_road && (rb & (axis == AXIS_X ? ROAD_Y : ROAD_X)) != 0) {
    00908         /* Someone was pedantic and *NEEDED* three fracking different error messages. */
    00909         switch (CountBits(rb)) {
    00910           case 1:
    00911             return_cmd_error(STR_ERROR_DRIVE_THROUGH_DIRECTION);
    00912
    00913           case 2:
    00914             if (rb == ROAD_X || rb == ROAD_Y) return_cmd_error(STR_ERROR_DRIVE_THROUGH_DIRECTION);
    00915             return_cmd_error(STR_ERROR_DRIVE_THROUGH_CORNER);
    00916
    00917           default: // 3 or 4
    00918             return_cmd_error(STR_ERROR_DRIVE_THROUGH_JUNCTION);
    00919         }
    00920       }
    00921
    00922       RoadTypes cur_rts = IsNormalRoadTile(cur_tile) ? GetRoadTypes(cur_tile) : ROADTYPES_NONE;
    00923       uint num_roadbits = 0;
    00924       if (build_over_road) {
    00925         /* There is a road, check if we can build road+tram stop over it. */
    00926         if (HasBit(cur_rts, ROADTYPE_ROAD)) {
    00927           Owner road_owner = GetRoadOwner(cur_tile, ROADTYPE_ROAD);
    00928           if (road_owner == OWNER_TOWN) {
    00929             if (!_settings_game.construction.road_stop_on_town_road) return_cmd_error(STR_ERROR_DRIVE_THROUGH_ON_TOWN_ROAD);
    00930           } else if (!_settings_game.construction.road_stop_on_competitor_road && road_owner != OWNER_NONE) {
    00931             CommandCost ret = CheckOwnership(road_owner);
    00932             if (ret.Failed()) return ret;
    00933           }
    00934           num_roadbits += CountBits(GetRoadBits(cur_tile, ROADTYPE_ROAD));
    00935         }
    00936
    00937         /* There is a tram, check if we can build road+tram stop over it. */
    00938         if (HasBit(cur_rts, ROADTYPE_TRAM)) {
    00939           Owner tram_owner = GetRoadOwner(cur_tile, ROADTYPE_TRAM);
    00940           if (!_settings_game.construction.road_stop_on_competitor_road && tram_owner != OWNER_NONE) {
    00941             CommandCost ret = CheckOwnership(tram_owner);
    00942             if (ret.Failed()) return ret;
    00943           }
    00944           num_roadbits += CountBits(GetRoadBits(cur_tile, ROADTYPE_TRAM));
    00945         }
    00946
    00947         /* Take into account existing roadbits. */
    00948         rts |= cur_rts;
    00949       } else {
    00950         ret = DoCommand(cur_tile, 0, 0, flags, CMD_LANDSCAPE_CLEAR);
    00951         if (ret.Failed()) return ret;
    00952         cost.AddCost(ret);
    00953       }
    00954
    00955       uint roadbits_to_build = CountBits(rts) * 2 - num_roadbits;
    00956       cost.AddCost(_price[PR_BUILD_ROAD] * roadbits_to_build);
    00957     }
    00958   }
    00959
    00960   return cost;
    00961 }
    00962
    00970 CommandCost CanExpandRailStation(const BaseStation *st, TileArea &new_ta, Axis axis)
    00971 {
    00972   TileArea cur_ta = st->train_station;
    00973
    00974   /* determine new size of train station region.. */
    00975   int x = min(TileX(cur_ta.tile), TileX(new_ta.tile));
    00976   int y = min(TileY(cur_ta.tile), TileY(new_ta.tile));
    00977   new_ta.w = max(TileX(cur_ta.tile) + cur_ta.w, TileX(new_ta.tile) + new_ta.w) - x;
    00978   new_ta.h = max(TileY(cur_ta.tile) + cur_ta.h, TileY(new_ta.tile) + new_ta.h) - y;
    00979   new_ta.tile = TileXY(x, y);
    00980
    00981   /* make sure the final size is not too big. */
    00982   if (new_ta.w > _settings_game.station.station_spread || new_ta.h > _settings_game.station.station_spread) {
    00983     return_cmd_error(STR_ERROR_STATION_TOO_SPREAD_OUT);
    00984   }
    00985
    00986   return CommandCost();
    00987 }
    00988
    00989 static inline byte *CreateSingle(byte *layout, int n)
    00990 {
    00991   int i = n;
    00992   do *layout++ = 0; while (--i);
    00993   layout[((n - 1) >> 1) - n] = 2;
    00994   return layout;
    00995 }
    00996
    00997 static inline byte *CreateMulti(byte *layout, int n, byte b)
    00998 {
    00999   int i = n;
    01000   do *layout++ = b; while (--i);
    01001   if (n > 4) {
    01002     layout[0 - n] = 0;
    01003     layout[n - 1 - n] = 0;
    01004   }
    01005   return layout;
    01006 }
    01007
    01015 void GetStationLayout(byte *layout, int numtracks, int plat_len, const StationSpec *statspec)
    01016 {
    01017   if (statspec != NULL && statspec->lengths >= plat_len &&
    01018       statspec->platforms[plat_len - 1] >= numtracks &&
    01019       statspec->layouts[plat_len - 1][numtracks - 1]) {
    01020     /* Custom layout defined, follow it. */
    01021     memcpy(layout, statspec->layouts[plat_len - 1][numtracks - 1],
    01022       plat_len * numtracks);
    01023     return;
    01024   }
    01025
    01026   if (plat_len == 1) {
    01027     CreateSingle(layout, numtracks);
    01028   } else {
    01029     if (numtracks & 1) layout = CreateSingle(layout, plat_len);
    01030     numtracks >>= 1;
    01031
    01032     while (--numtracks >= 0) {
    01033       layout = CreateMulti(layout, plat_len, 4);
    01034       layout = CreateMulti(layout, plat_len, 6);
    01035     }
    01036   }
    01037 }
    01038
    01050 template <class T, StringID error_message>
    01051 CommandCost FindJoiningBaseStation(StationID existing_station, StationID station_to_join, bool adjacent, TileArea ta, T **st)
    01052 {
    01053   assert(*st == NULL);
    01054   bool check_surrounding = true;
    01055
    01056   if (_settings_game.station.adjacent_stations) {
    01057     if (existing_station != INVALID_STATION) {
    01058       if (adjacent && existing_station != station_to_join) {
    01059         /* You can't build an adjacent station over the top of one that
    01060          * already exists. */
    01061         return_cmd_error(error_message);
    01062       } else {
    01063         /* Extend the current station, and don't check whether it will
    01064          * be near any other stations. */
    01065         *st = T::GetIfValid(existing_station);
    01066         check_surrounding = (*st == NULL);
    01067       }
    01068     } else {
    01069       /* There's no station here. Don't check the tiles surrounding this
    01070        * one if the company wanted to build an adjacent station. */
    01071       if (adjacent) check_surrounding = false;
    01072     }
    01073   }
    01074
    01075   if (check_surrounding) {
    01076     /* Make sure there are no similar stations around us. */
    01077     CommandCost ret = GetStationAround(ta, existing_station, st);
    01078     if (ret.Failed()) return ret;
    01079   }
    01080
    01081   /* Distant join */
    01082   if (*st == NULL && station_to_join != INVALID_STATION) *st = T::GetIfValid(station_to_join);
    01083
    01084   return CommandCost();
    01085 }
    01086
    01096 static CommandCost FindJoiningStation(StationID existing_station, StationID station_to_join, bool adjacent, TileArea ta, Station **st)
    01097 {
    01098   return FindJoiningBaseStation<Station, STR_ERROR_MUST_REMOVE_RAILWAY_STATION_FIRST>(existing_station, station_to_join, adjacent, ta, st);
    01099 }
    01100
    01110 CommandCost FindJoiningWaypoint(StationID existing_waypoint, StationID waypoint_to_join, bool adjacent, TileArea ta, Waypoint **wp)
    01111 {
    01112   return FindJoiningBaseStation<Waypoint, STR_ERROR_MUST_REMOVE_RAILWAYPOINT_FIRST>(existing_waypoint, waypoint_to_join, adjacent, ta, wp);
    01113 }
    01114
    01132 CommandCost CmdBuildRailStation(TileIndex tile_org, DoCommandFlag flags, uint32 p1, uint32 p2, const char *text)
    01133 {
    01134   /* Unpack parameters */
    01135   RailType rt    = Extract<RailType, 0, 4>(p1);
    01136   Axis axis      = Extract<Axis, 4, 1>(p1);
    01137   byte numtracks = GB(p1,  8, 8);
    01138   byte plat_len  = GB(p1, 16, 8);
    01139   bool adjacent  = HasBit(p1, 24);
    01140
    01141   StationClassID spec_class = Extract<StationClassID, 0, 8>(p2);
    01142   byte spec_index           = GB(p2, 8, 8);
    01143   StationID station_to_join = GB(p2, 16, 16);
    01144
    01145   /* Does the authority allow this? */
    01146   CommandCost ret = CheckIfAuthorityAllowsNewStation(tile_org, flags);
    01147   if (ret.Failed()) return ret;
    01148
    01149   if (!ValParamRailtype(rt)) return CMD_ERROR;
    01150
    01151   /* Check if the given station class is valid */
    01152   if ((uint)spec_class >= StationClass::GetClassCount() || spec_class == STAT_CLASS_WAYP) return CMD_ERROR;
    01153   if (spec_index >= StationClass::Get(spec_class)->GetSpecCount()) return CMD_ERROR;
    01154   if (plat_len == 0 || numtracks == 0) return CMD_ERROR;
    01155
    01156   int w_org, h_org;
    01157   if (axis == AXIS_X) {
    01158     w_org = plat_len;
    01159     h_org = numtracks;
    01160   } else {
    01161     h_org = plat_len;
    01162     w_org = numtracks;
    01163   }
    01164
    01165   bool reuse = (station_to_join != NEW_STATION);
    01166   if (!reuse) station_to_join = INVALID_STATION;
    01167   bool distant_join = (station_to_join != INVALID_STATION);
    01168
    01169   if (distant_join && (!_settings_game.station.distant_join_stations || !Station::IsValidID(station_to_join))) return CMD_ERROR;
    01170
    01171   if (h_org > _settings_game.station.station_spread || w_org > _settings_game.station.station_spread) return CMD_ERROR;
    01172
    01173   /* these values are those that will be stored in train_tile and station_platforms */
    01174   TileArea new_location(tile_org, w_org, h_org);
    01175
    01176   /* Make sure the area below consists of clear tiles. (OR tiles belonging to a certain rail station) */
    01177   StationID est = INVALID_STATION;
    01178   SmallVector<Train *, 4> affected_vehicles;
    01179   /* Clear the land below the station. */
    01180   CommandCost cost = CheckFlatLandRailStation(new_location, flags, axis, &est, rt, affected_vehicles, spec_class, spec_index, plat_len, numtracks);
    01181   if (cost.Failed()) return cost;
    01182   /* Add construction expenses. */
    01183   cost.AddCost((numtracks * _price[PR_BUILD_STATION_RAIL] + _price[PR_BUILD_STATION_RAIL_LENGTH]) * plat_len);
    01184   cost.AddCost(numtracks * plat_len * RailBuildCost(rt));
    01185
    01186   Station *st = NULL;
    01187   ret = FindJoiningStation(est, station_to_join, adjacent, new_location, &st);
    01188   if (ret.Failed()) return ret;
    01189
    01190   ret = BuildStationPart(&st, flags, reuse, new_location, STATIONNAMING_RAIL);
    01191   if (ret.Failed()) return ret;
    01192
    01193   if (st != NULL && st->train_station.tile != INVALID_TILE) {
    01194     CommandCost ret = CanExpandRailStation(st, new_location, axis);
    01195     if (ret.Failed()) return ret;
    01196   }
    01197
    01198   /* Check if we can allocate a custom stationspec to this station */
    01199   const StationSpec *statspec = StationClass::Get(spec_class)->GetSpec(spec_index);
    01200   int specindex = AllocateSpecToStation(statspec, st, (flags & DC_EXEC) != 0);
    01201   if (specindex == -1) return_cmd_error(STR_ERROR_TOO_MANY_STATION_SPECS);
    01202
    01203   if (statspec != NULL) {
    01204     /* Perform NewStation checks */
    01205
    01206     /* Check if the station size is permitted */
    01207     if (HasBit(statspec->disallowed_platforms, numtracks - 1) || HasBit(statspec->disallowed_lengths, plat_len - 1)) {
    01208       return CMD_ERROR;
    01209     }
    01210
    01211     /* Check if the station is buildable */
    01212     if (HasBit(statspec->callback_mask, CBM_STATION_AVAIL)) {
    01213       uint16 cb_res = GetStationCallback(CBID_STATION_AVAILABILITY, 0, 0, statspec, NULL, INVALID_TILE);
    01214       if (cb_res != CALLBACK_FAILED && !Convert8bitBooleanCallback(statspec->grf_prop.grffile, CBID_STATION_AVAILABILITY, cb_res)) return CMD_ERROR;
    01215     }
    01216   }
    01217
    01218   if (flags & DC_EXEC) {
    01219     TileIndexDiff tile_delta;
    01220     byte *layout_ptr;
    01221     byte numtracks_orig;
    01222     Track track;
    01223
    01224     st->train_station = new_location;
    01225     st->AddFacility(FACIL_TRAIN, new_location.tile);
    01226
    01227     st->rect.BeforeAddRect(tile_org, w_org, h_org, StationRect::ADD_TRY);
    01228
    01229     if (statspec != NULL) {
    01230       /* Include this station spec's animation trigger bitmask
    01231        * in the station's cached copy. */
    01232       st->cached_anim_triggers |= statspec->animation.triggers;
    01233     }
    01234
    01235     tile_delta = (axis == AXIS_X ? TileDiffXY(1, 0) : TileDiffXY(0, 1));
    01236     track = AxisToTrack(axis);
    01237
    01238     layout_ptr = AllocaM(byte, numtracks * plat_len);
    01239     GetStationLayout(layout_ptr, numtracks, plat_len, statspec);
    01240
    01241     numtracks_orig = numtracks;
    01242
    01243     Company *c = Company::Get(st->owner);
    01244     TileIndex tile_track = tile_org;
    01245     do {
    01246       TileIndex tile = tile_track;
    01247       int w = plat_len;
    01248       do {
    01249         byte layout = *layout_ptr++;
    01250         if (IsRailStationTile(tile) && HasStationReservation(tile)) {
    01251           /* Check for trains having a reservation for this tile. */
    01252           Train *v = GetTrainForReservation(tile, AxisToTrack(GetRailStationAxis(tile)));
    01253           if (v != NULL) {
    01254             FreeTrainTrackReservation(v);
    01255             *affected_vehicles.Append() = v;
    01256             if (IsRailStationTile(v->tile)) SetRailStationPlatformReservation(v->tile, TrackdirToExitdir(v->GetVehicleTrackdir()), false);
    01257             for (; v->Next() != NULL; v = v->Next()) { }
    01258             if (IsRailStationTile(v->tile)) SetRailStationPlatformReservation(v->tile, TrackdirToExitdir(ReverseTrackdir(v->GetVehicleTrackdir())), false);
    01259           }
    01260         }
    01261
    01262         /* Railtype can change when overbuilding. */
    01263         if (IsRailStationTile(tile)) {
    01264           if (!IsStationTileBlocked(tile)) c->infrastructure.rail[GetRailType(tile)]--;
    01265           c->infrastructure.station--;
    01266         }
    01267
    01268         /* Remove animation if overbuilding */
    01269         DeleteAnimatedTile(tile);
    01270         byte old_specindex = HasStationTileRail(tile) ? GetCustomStationSpecIndex(tile) : 0;
    01271         MakeRailStation(tile, st->owner, st->index, axis, layout & ~1, rt);
    01272         /* Free the spec if we overbuild something */
    01273         DeallocateSpecFromStation(st, old_specindex);
    01274
    01275         SetCustomStationSpecIndex(tile, specindex);
    01276         SetStationTileRandomBits(tile, GB(Random(), 0, 4));
    01277         SetAnimationFrame(tile, 0);
    01278
    01279         if (!IsStationTileBlocked(tile)) c->infrastructure.rail[rt]++;
    01280         c->infrastructure.station++;
    01281
    01282         if (statspec != NULL) {
    01283           /* Use a fixed axis for GetPlatformInfo as our platforms / numtracks are always the right way around */
    01284           uint32 platinfo = GetPlatformInfo(AXIS_X, GetStationGfx(tile), plat_len, numtracks_orig, plat_len - w, numtracks_orig - numtracks, false);
    01285
    01286           /* As the station is not yet completely finished, the station does not yet exist. */
    01287           uint16 callback = GetStationCallback(CBID_STATION_TILE_LAYOUT, platinfo, 0, statspec, NULL, tile);
    01288           if (callback != CALLBACK_FAILED) {
    01289             if (callback < 8) {
    01290               SetStationGfx(tile, (callback & ~1) + axis);
    01291             } else {
    01292               ErrorUnknownCallbackResult(statspec->grf_prop.grffile->grfid, CBID_STATION_TILE_LAYOUT, callback);
    01293             }
    01294           }
    01295
    01296           /* Trigger station animation -- after building? */
    01297           TriggerStationAnimation(st, tile, SAT_BUILT);
    01298         }
    01299
    01300         tile += tile_delta;
    01301       } while (--w);
    01302       AddTrackToSignalBuffer(tile_track, track, _current_company);
    01303       YapfNotifyTrackLayoutChange(tile_track, track);
    01304       tile_track += tile_delta ^ TileDiffXY(1, 1); // perpendicular to tile_delta
    01305     } while (--numtracks);
    01306
    01307     for (uint i = 0; i < affected_vehicles.Length(); ++i) {
    01308       /* Restore reservations of trains. */
    01309       Train *v = affected_vehicles[i];
    01310       if (IsRailStationTile(v->tile)) SetRailStationPlatformReservation(v->tile, TrackdirToExitdir(v->GetVehicleTrackdir()), true);
    01311       TryPathReserve(v, true, true);
    01312       for (; v->Next() != NULL; v = v->Next()) { }
    01313       if (IsRailStationTile(v->tile)) SetRailStationPlatformReservation(v->tile, TrackdirToExitdir(ReverseTrackdir(v->GetVehicleTrackdir())), true);
    01314     }
    01315
    01316     /* Check whether we need to expand the reservation of trains already on the station. */
    01317     TileArea update_reservation_area;
    01318     if (axis == AXIS_X) {
    01319       update_reservation_area = TileArea(tile_org, 1, numtracks_orig);
    01320     } else {
    01321       update_reservation_area = TileArea(tile_org, numtracks_orig, 1);
    01322     }
    01323
    01324     TILE_AREA_LOOP(tile, update_reservation_area) {
    01325       /* Don't even try to make eye candy parts reserved. */
    01326       if (IsStationTileBlocked(tile)) continue;
    01327
    01328       DiagDirection dir = AxisToDiagDir(axis);
    01329       TileIndexDiff tile_offset = TileOffsByDiagDir(dir);
    01330       TileIndex platform_begin = tile;
    01331       TileIndex platform_end = tile;
    01332
    01333       /* We can only account for tiles that are reachable from this tile, so ignore primarily blocked tiles while finding the platform begin and end. */
    01334       for (TileIndex next_tile = platform_begin - tile_offset; IsCompatibleTrainStationTile(next_tile, platform_begin); next_tile -= tile_offset) {
    01335         platform_begin = next_tile;
    01336       }
    01337       for (TileIndex next_tile = platform_end + tile_offset; IsCompatibleTrainStationTile(next_tile, platform_end); next_tile += tile_offset) {
    01338         platform_end = next_tile;
    01339       }
    01340
    01341       /* If there is at least on reservation on the platform, we reserve the whole platform. */
    01342       bool reservation = false;
    01343       for (TileIndex t = platform_begin; !reservation && t <= platform_end; t += tile_offset) {
    01344         reservation = HasStationReservation(t);
    01345       }
    01346
    01347       if (reservation) {
    01348         SetRailStationPlatformReservation(platform_begin, dir, true);
    01349       }
    01350     }
    01351
    01352     st->MarkTilesDirty(false);
    01353     st->UpdateVirtCoord();
    01354     UpdateStationAcceptance(st, false);
    01355     st->RecomputeIndustriesNear();
    01356     InvalidateWindowData(WC_SELECT_STATION, 0, 0);
    01357     InvalidateWindowData(WC_STATION_LIST, st->owner, 0);
    01358     SetWindowWidgetDirty(WC_STATION_VIEW, st->index, WID_SV_TRAINS);
    01359     DirtyCompanyInfrastructureWindows(st->owner);
    01360   }
    01361
    01362   return cost;
    01363 }
    01364
    01365 static void MakeRailStationAreaSmaller(BaseStation *st)
    01366 {
    01367   TileArea ta = st->train_station;
    01368
    01369 restart:
    01370
    01371   /* too small? */
    01372   if (ta.w != 0 && ta.h != 0) {
    01373     /* check the left side, x = constant, y changes */
    01374     for (uint i = 0; !st->TileBelongsToRailStation(ta.tile + TileDiffXY(0, i));) {
    01375       /* the left side is unused? */
    01376       if (++i == ta.h) {
    01377         ta.tile += TileDiffXY(1, 0);
    01378         ta.w--;
    01379         goto restart;
    01380       }
    01381     }
    01382
    01383     /* check the right side, x = constant, y changes */
    01384     for (uint i = 0; !st->TileBelongsToRailStation(ta.tile + TileDiffXY(ta.w - 1, i));) {
    01385       /* the right side is unused? */
    01386       if (++i == ta.h) {
    01387         ta.w--;
    01388         goto restart;
    01389       }
    01390     }
    01391
    01392     /* check the upper side, y = constant, x changes */
    01393     for (uint i = 0; !st->TileBelongsToRailStation(ta.tile + TileDiffXY(i, 0));) {
    01394       /* the left side is unused? */
    01395       if (++i == ta.w) {
    01396         ta.tile += TileDiffXY(0, 1);
    01397         ta.h--;
    01398         goto restart;
    01399       }
    01400     }
    01401
    01402     /* check the lower side, y = constant, x changes */
    01403     for (uint i = 0; !st->TileBelongsToRailStation(ta.tile + TileDiffXY(i, ta.h - 1));) {
    01404       /* the left side is unused? */
    01405       if (++i == ta.w) {
    01406         ta.h--;
    01407         goto restart;
    01408       }
    01409     }
    01410   } else {
    01411     ta.Clear();
    01412   }
    01413
    01414   st->train_station = ta;
    01415 }
    01416
    01427 template <class T>
    01428 CommandCost RemoveFromRailBaseStation(TileArea ta, SmallVector<T *, 4> &affected_stations, DoCommandFlag flags, Money removal_cost, bool keep_rail)
    01429 {
    01430   /* Count of the number of tiles removed */
    01431   int quantity = 0;
    01432   CommandCost total_cost(EXPENSES_CONSTRUCTION);
    01433   /* Accumulator for the errors seen during clearing. If no errors happen,
    01434    * and the quantity is 0 there is no station. Otherwise it will be one
    01435    * of the other error that got accumulated. */
    01436   CommandCost error;
    01437
    01438   /* Do the action for every tile into the area */
    01439   TILE_AREA_LOOP(tile, ta) {
    01440     /* Make sure the specified tile is a rail station */
    01441     if (!HasStationTileRail(tile)) continue;
    01442
    01443     /* If there is a vehicle on ground, do not allow to remove (flood) the tile */
    01444     CommandCost ret = EnsureNoVehicleOnGround(tile);
    01445     error.AddCost(ret);
    01446     if (ret.Failed()) continue;
    01447
    01448     /* Check ownership of station */
    01449     T *st = T::GetByTile(tile);
    01450     if (st == NULL) continue;
    01451
    01452     if (_current_company != OWNER_WATER) {
    01453       CommandCost ret = CheckOwnership(st->owner);
    01454       error.AddCost(ret);
    01455       if (ret.Failed()) continue;
    01456     }
    01457
    01458     /* If we reached here, the tile is valid so increase the quantity of tiles we will remove */
    01459     quantity++;
    01460
    01461     if (keep_rail || IsStationTileBlocked(tile)) {
    01462       /* Don't refund the 'steel' of the track when we keep the
    01463        *  rail, or when the tile didn't have any rail at all. */
    01464       total_cost.AddCost(-_price[PR_CLEAR_RAIL]);
    01465     }
    01466
    01467     if (flags & DC_EXEC) {
    01468       /* read variables before the station tile is removed */
    01469       uint specindex = GetCustomStationSpecIndex(tile);
    01470       Track track = GetRailStationTrack(tile);
    01471       Owner owner = GetTileOwner(tile);
    01472       RailType rt = GetRailType(tile);
    01473       Train *v = NULL;
    01474
    01475       if (HasStationReservation(tile)) {
    01476         v = GetTrainForReservation(tile, track);
    01477         if (v != NULL) {
    01478           /* Free train reservation. */
    01479           FreeTrainTrackReservation(v);
    01480           if (IsRailStationTile(v->tile)) SetRailStationPlatformReservation(v->tile, TrackdirToExitdir(v->GetVehicleTrackdir()), false);
    01481           Vehicle *temp = v;
    01482           for (; temp->Next() != NULL; temp = temp->Next()) { }
    01483           if (IsRailStationTile(temp->tile)) SetRailStationPlatformReservation(temp->tile, TrackdirToExitdir(ReverseTrackdir(temp->GetVehicleTrackdir())), false);
    01484         }
    01485       }
    01486
    01487       bool build_rail = keep_rail && !IsStationTileBlocked(tile);
    01488       if (!build_rail && !IsStationTileBlocked(tile)) Company::Get(owner)->infrastructure.rail[rt]--;
    01489
    01490       DoClearSquare(tile);
    01491       DeleteNewGRFInspectWindow(GSF_STATIONS, tile);
    01492       if (build_rail) MakeRailNormal(tile, owner, TrackToTrackBits(track), rt);
    01493       Company::Get(owner)->infrastructure.station--;
    01494       DirtyCompanyInfrastructureWindows(owner);
    01495
    01496       st->rect.AfterRemoveTile(st, tile);
    01497       AddTrackToSignalBuffer(tile, track, owner);
    01498       YapfNotifyTrackLayoutChange(tile, track);
    01499
    01500       DeallocateSpecFromStation(st, specindex);
    01501
    01502       affected_stations.Include(st);
    01503
    01504       if (v != NULL) {
    01505         /* Restore station reservation. */
    01506         if (IsRailStationTile(v->tile)) SetRailStationPlatformReservation(v->tile, TrackdirToExitdir(v->GetVehicleTrackdir()), true);
    01507         TryPathReserve(v, true, true);
    01508         for (; v->Next() != NULL; v = v->Next()) { }
    01509         if (IsRailStationTile(v->tile)) SetRailStationPlatformReservation(v->tile, TrackdirToExitdir(ReverseTrackdir(v->GetVehicleTrackdir())), true);
    01510       }
    01511     }
    01512   }
    01513
    01514   if (quantity == 0) return error.Failed() ? error : CommandCost(STR_ERROR_THERE_IS_NO_STATION);
    01515
    01516   for (T **stp = affected_stations.Begin(); stp != affected_stations.End(); stp++) {
    01517     T *st = *stp;
    01518
    01519     /* now we need to make the "spanned" area of the railway station smaller
    01520      * if we deleted something at the edges.
    01521      * we also need to adjust train_tile. */
    01522     MakeRailStationAreaSmaller(st);
    01523     UpdateStationSignCoord(st);
    01524
    01525     /* if we deleted the whole station, delete the train facility. */
    01526     if (st->train_station.tile == INVALID_TILE) {
    01527       st->facilities &= ~FACIL_TRAIN;
    01528       SetWindowWidgetDirty(WC_STATION_VIEW, st->index, WID_SV_TRAINS);
    01529       st->UpdateVirtCoord();
    01530       DeleteStationIfEmpty(st);
    01531     }
    01532   }
    01533
    01534   total_cost.AddCost(quantity * removal_cost);
    01535   return total_cost;
    01536 }
    01537
    01549 CommandCost CmdRemoveFromRailStation(TileIndex start, DoCommandFlag flags, uint32 p1, uint32 p2, const char *text)
    01550 {
    01551   TileIndex end = p1 == 0 ? start : p1;
    01552   if (start >= MapSize() || end >= MapSize()) return CMD_ERROR;
    01553
    01554   TileArea ta(start, end);
    01555   SmallVector<Station *, 4> affected_stations;
    01556
    01557   CommandCost ret = RemoveFromRailBaseStation(ta, affected_stations, flags, _price[PR_CLEAR_STATION_RAIL], HasBit(p2, 0));
    01558   if (ret.Failed()) return ret;
    01559
    01560   /* Do all station specific functions here. */
    01561   for (Station **stp = affected_stations.Begin(); stp != affected_stations.End(); stp++) {
    01562     Station *st = *stp;
    01563
    01564     if (st->train_station.tile == INVALID_TILE) SetWindowWidgetDirty(WC_STATION_VIEW, st->index, WID_SV_TRAINS);
    01565     st->MarkTilesDirty(false);
    01566     st->RecomputeIndustriesNear();
    01567   }
    01568
    01569   /* Now apply the rail cost to the number that we deleted */
    01570   return ret;
    01571 }
    01572
    01584 CommandCost CmdRemoveFromRailWaypoint(TileIndex start, DoCommandFlag flags, uint32 p1, uint32 p2, const char *text)
    01585 {
    01586   TileIndex end = p1 == 0 ? start : p1;
    01587   if (start >= MapSize() || end >= MapSize()) return CMD_ERROR;
    01588
    01589   TileArea ta(start, end);
    01590   SmallVector<Waypoint *, 4> affected_stations;
    01591
    01592   return RemoveFromRailBaseStation(ta, affected_stations, flags, _price[PR_CLEAR_WAYPOINT_RAIL], HasBit(p2, 0));
    01593 }
    01594
    01595
    01603 template <class T>
    01604 CommandCost RemoveRailStation(T *st, DoCommandFlag flags)
    01605 {
    01606   /* Current company owns the station? */
    01607   if (_current_company != OWNER_WATER) {
    01608     CommandCost ret = CheckOwnership(st->owner);
    01609     if (ret.Failed()) return ret;
    01610   }
    01611
    01612   /* determine width and height of platforms */
    01613   TileArea ta = st->train_station;
    01614
    01615   assert(ta.w != 0 && ta.h != 0);
    01616
    01617   CommandCost cost(EXPENSES_CONSTRUCTION);
    01618   /* clear all areas of the station */
    01619   TILE_AREA_LOOP(tile, ta) {
    01620     /* only remove tiles that are actually train station tiles */
    01621     if (!st->TileBelongsToRailStation(tile)) continue;
    01622
    01623     CommandCost ret = EnsureNoVehicleOnGround(tile);
    01624     if (ret.Failed()) return ret;
    01625
    01626     cost.AddCost(_price[PR_CLEAR_STATION_RAIL]);
    01627     if (flags & DC_EXEC) {
    01628       /* read variables before the station tile is removed */
    01629       Track track = GetRailStationTrack(tile);
    01630       Owner owner = GetTileOwner(tile); // _current_company can be OWNER_WATER
    01631       Train *v = NULL;
    01632       if (HasStationReservation(tile)) {
    01633         v = GetTrainForReservation(tile, track);
    01634         if (v != NULL) FreeTrainTrackReservation(v);
    01635       }
    01636       if (!IsStationTileBlocked(tile)) Company::Get(owner)->infrastructure.rail[GetRailType(tile)]--;
    01637       Company::Get(owner)->infrastructure.station--;
    01638       DoClearSquare(tile);
    01639       DeleteNewGRFInspectWindow(GSF_STATIONS, tile);
    01640       AddTrackToSignalBuffer(tile, track, owner);
    01641       YapfNotifyTrackLayoutChange(tile, track);
    01642       if (v != NULL) TryPathReserve(v, true);
    01643     }
    01644   }
    01645
    01646   if (flags & DC_EXEC) {
    01647     st->rect.AfterRemoveRect(st, st->train_station);
    01648
    01649     st->train_station.Clear();
    01650
    01651     st->facilities &= ~FACIL_TRAIN;
    01652
    01653     free(st->speclist);
    01654     st->num_specs = 0;
    01655     st->speclist  = NULL;
    01656     st->cached_anim_triggers = 0;
    01657
    01658     DirtyCompanyInfrastructureWindows(st->owner);
    01659     SetWindowWidgetDirty(WC_STATION_VIEW, st->index, WID_SV_TRAINS);
    01660     st->UpdateVirtCoord();
    01661     DeleteStationIfEmpty(st);
    01662   }
    01663
    01664   return cost;
    01665 }
    01666
    01673 static CommandCost RemoveRailStation(TileIndex tile, DoCommandFlag flags)
    01674 {
    01675   /* if there is flooding, remove platforms tile by tile */
    01676   if (_current_company == OWNER_WATER) {
    01677     return DoCommand(tile, 0, 0, DC_EXEC, CMD_REMOVE_FROM_RAIL_STATION);
    01678   }
    01679
    01680   Station *st = Station::GetByTile(tile);
    01681   CommandCost cost = RemoveRailStation(st, flags);
    01682
    01683   if (flags & DC_EXEC) st->RecomputeIndustriesNear();
    01684
    01685   return cost;
    01686 }
    01687
    01694 static CommandCost RemoveRailWaypoint(TileIndex tile, DoCommandFlag flags)
    01695 {
    01696   /* if there is flooding, remove waypoints tile by tile */
    01697   if (_current_company == OWNER_WATER) {
    01698     return DoCommand(tile, 0, 0, DC_EXEC, CMD_REMOVE_FROM_RAIL_WAYPOINT);
    01699   }
    01700
    01701   return RemoveRailStation(Waypoint::GetByTile(tile), flags);
    01702 }
    01703
    01704
    01710 static RoadStop **FindRoadStopSpot(bool truck_station, Station *st)
    01711 {
    01712   RoadStop **primary_stop = (truck_station) ? &st->truck_stops : &st->bus_stops;
    01713
    01714   if (*primary_stop == NULL) {
    01715     /* we have no roadstop of the type yet, so write a "primary stop" */
    01716     return primary_stop;
    01717   } else {
    01718     /* there are stops already, so append to the end of the list */
    01719     RoadStop *stop = *primary_stop;
    01720     while (stop->next != NULL) stop = stop->next;
    01721     return &stop->next;
    01722   }
    01723 }
    01724
    01725 static CommandCost RemoveRoadStop(TileIndex tile, DoCommandFlag flags);
    01726
    01736 static CommandCost FindJoiningRoadStop(StationID existing_stop, StationID station_to_join, bool adjacent, TileArea ta, Station **st)
    01737 {
    01738   return FindJoiningBaseStation<Station, STR_ERROR_MUST_REMOVE_ROAD_STOP_FIRST>(existing_stop, station_to_join, adjacent, ta, st);
    01739 }
    01740
    01756 CommandCost CmdBuildRoadStop(TileIndex tile, DoCommandFlag flags, uint32 p1, uint32 p2, const char *text)
    01757 {
    01758   bool type = HasBit(p2, 0);
    01759   bool is_drive_through = HasBit(p2, 1);
    01760   RoadTypes rts = Extract<RoadTypes, 2, 2>(p2);
    01761   StationID station_to_join = GB(p2, 16, 16);
    01762   bool reuse = (station_to_join != NEW_STATION);
    01763   if (!reuse) station_to_join = INVALID_STATION;
    01764   bool distant_join = (station_to_join != INVALID_STATION);
    01765
    01766   uint8 width = (uint8)GB(p1, 0, 8);
    01767   uint8 lenght = (uint8)GB(p1, 8, 8);
    01768
    01769   /* Check if the requested road stop is too big */
    01770   if (width > _settings_game.station.station_spread || lenght > _settings_game.station.station_spread) return_cmd_error(STR_ERROR_STATION_TOO_SPREAD_OUT);
    01771   /* Check for incorrect width / length. */
    01772   if (width == 0 || lenght == 0) return CMD_ERROR;
    01773   /* Check if the first tile and the last tile are valid */
    01774   if (!IsValidTile(tile) || TileAddWrap(tile, width - 1, lenght - 1) == INVALID_TILE) return CMD_ERROR;
    01775
    01776   TileArea roadstop_area(tile, width, lenght);
    01777
    01778   if (distant_join && (!_settings_game.station.distant_join_stations || !Station::IsValidID(station_to_join))) return CMD_ERROR;
    01779
    01780   if (!HasExactlyOneBit(rts) || !HasRoadTypesAvail(_current_company, rts)) return CMD_ERROR;
    01781
    01782   /* Trams only have drive through stops */
    01783   if (!is_drive_through && HasBit(rts, ROADTYPE_TRAM)) return CMD_ERROR;
    01784
    01785   DiagDirection ddir = Extract<DiagDirection, 6, 2>(p2);
    01786
    01787   /* Safeguard the parameters. */
    01788   if (!IsValidDiagDirection(ddir)) return CMD_ERROR;
    01789   /* If it is a drive-through stop, check for valid axis. */
    01790   if (is_drive_through && !IsValidAxis((Axis)ddir)) return CMD_ERROR;
    01791
    01792   CommandCost ret = CheckIfAuthorityAllowsNewStation(tile, flags);
    01793   if (ret.Failed()) return ret;
    01794
    01795   /* Total road stop cost. */
    01796   CommandCost cost(EXPENSES_CONSTRUCTION, roadstop_area.w * roadstop_area.h * _price[type ? PR_BUILD_STATION_TRUCK : PR_BUILD_STATION_BUS]);
    01797   StationID est = INVALID_STATION;
    01798   ret = CheckFlatLandRoadStop(roadstop_area, flags, is_drive_through ? 5 << ddir : 1 << ddir, is_drive_through, type, DiagDirToAxis(ddir), &est, rts);
    01799   if (ret.Failed()) return ret;
    01800   cost.AddCost(ret);
    01801
    01802   Station *st = NULL;
    01803   ret = FindJoiningRoadStop(est, station_to_join, HasBit(p2, 5), roadstop_area, &st);
    01804   if (ret.Failed()) return ret;
    01805
    01806   /* Check if this number of road stops can be allocated. */
    01807   if (!RoadStop::CanAllocateItem(roadstop_area.w * roadstop_area.h)) return_cmd_error(type ? STR_ERROR_TOO_MANY_TRUCK_STOPS : STR_ERROR_TOO_MANY_BUS_STOPS);
    01808
    01809   ret = BuildStationPart(&st, flags, reuse, roadstop_area, STATIONNAMING_ROAD);
    01810   if (ret.Failed()) return ret;
    01811
    01812   if (flags & DC_EXEC) {
    01813     /* Check every tile in the area. */
    01814     TILE_AREA_LOOP(cur_tile, roadstop_area) {
    01815       RoadTypes cur_rts = GetRoadTypes(cur_tile);
    01816       Owner road_owner = HasBit(cur_rts, ROADTYPE_ROAD) ? GetRoadOwner(cur_tile, ROADTYPE_ROAD) : _current_company;
    01817       Owner tram_owner = HasBit(cur_rts, ROADTYPE_TRAM) ? GetRoadOwner(cur_tile, ROADTYPE_TRAM) : _current_company;
    01818
    01819       if (IsTileType(cur_tile, MP_STATION) && IsRoadStop(cur_tile)) {
    01820         RemoveRoadStop(cur_tile, flags);
    01821       }
    01822
    01823       RoadStop *road_stop = new RoadStop(cur_tile);
    01824       /* Insert into linked list of RoadStops. */
    01825       RoadStop **currstop = FindRoadStopSpot(type, st);
    01826       *currstop = road_stop;
    01827
    01828       if (type) {
    01829         st->truck_station.Add(cur_tile);
    01830       } else {
    01831         st->bus_station.Add(cur_tile);
    01832       }
    01833
    01834       /* Initialize an empty station. */
    01835       st->AddFacility((type) ? FACIL_TRUCK_STOP : FACIL_BUS_STOP, cur_tile);
    01836
    01837       st->rect.BeforeAddTile(cur_tile, StationRect::ADD_TRY);
    01838
    01839       RoadStopType rs_type = type ? ROADSTOP_TRUCK : ROADSTOP_BUS;
    01840       if (is_drive_through) {
    01841         /* Update company infrastructure counts. If the current tile is a normal
    01842          * road tile, count only the new road bits needed to get a full diagonal road. */
    01843         RoadType rt;
    01844         FOR_EACH_SET_ROADTYPE(rt, cur_rts | rts) {
    01845           Company *c = Company::GetIfValid(rt == ROADTYPE_ROAD ? road_owner : tram_owner);
    01846           if (c != NULL) {
    01847             c->infrastructure.road[rt] += 2 - (IsNormalRoadTile(cur_tile) && HasBit(cur_rts, rt) ? CountBits(GetRoadBits(cur_tile, rt)) : 0);
    01848             DirtyCompanyInfrastructureWindows(c->index);
    01849           }
    01850         }
    01851
    01852         MakeDriveThroughRoadStop(cur_tile, st->owner, road_owner, tram_owner, st->index, rs_type, rts | cur_rts, DiagDirToAxis(ddir));
    01853         road_stop->MakeDriveThrough();
    01854       } else {
    01855         /* Non-drive-through stop never overbuild and always count as two road bits. */
    01856         Company::Get(st->owner)->infrastructure.road[FIND_FIRST_BIT(rts)] += 2;
    01857         MakeRoadStop(cur_tile, st->owner, st->index, rs_type, rts, ddir);
    01858       }
    01859       Company::Get(st->owner)->infrastructure.station++;
    01860       DirtyCompanyInfrastructureWindows(st->owner);
    01861
    01862       MarkTileDirtyByTile(cur_tile);
    01863     }
    01864   }
    01865
    01866   if (st != NULL) {
    01867     st->UpdateVirtCoord();
    01868     UpdateStationAcceptance(st, false);
    01869     st->RecomputeIndustriesNear();
    01870     InvalidateWindowData(WC_SELECT_STATION, 0, 0);
    01871     InvalidateWindowData(WC_STATION_LIST, st->owner, 0);
    01872     SetWindowWidgetDirty(WC_STATION_VIEW, st->index, WID_SV_ROADVEHS);
    01873   }
    01874   return cost;
    01875 }
    01876
    01877
    01878 static Vehicle *ClearRoadStopStatusEnum(Vehicle *v, void *)
    01879 {
    01880   if (v->type == VEH_ROAD) {
    01881     /* Okay... we are a road vehicle on a drive through road stop.
    01882      * But that road stop has just been removed, so we need to make
    01883      * sure we are in a valid state... however, vehicles can also
    01884      * turn on road stop tiles, so only clear the 'road stop' state
    01885      * bits and only when the state was 'in road stop', otherwise
    01886      * we'll end up clearing the turn around bits. */
    01887     RoadVehicle *rv = RoadVehicle::From(v);
    01888     if (HasBit(rv->state, RVS_IN_DT_ROAD_STOP)) rv->state &= RVSB_ROAD_STOP_TRACKDIR_MASK;
    01889   }
    01890
    01891   return NULL;
    01892 }
    01893
    01894
    01901 static CommandCost RemoveRoadStop(TileIndex tile, DoCommandFlag flags)
    01902 {
    01903   Station *st = Station::GetByTile(tile);
    01904
    01905   if (_current_company != OWNER_WATER) {
    01906     CommandCost ret = CheckOwnership(st->owner);
    01907     if (ret.Failed()) return ret;
    01908   }
    01909
    01910   bool is_truck = IsTruckStop(tile);
    01911
    01912   RoadStop **primary_stop;
    01913   RoadStop *cur_stop;
    01914   if (is_truck) { // truck stop
    01915     primary_stop = &st->truck_stops;
    01916     cur_stop = RoadStop::GetByTile(tile, ROADSTOP_TRUCK);
    01917   } else {
    01918     primary_stop = &st->bus_stops;
    01919     cur_stop = RoadStop::GetByTile(tile, ROADSTOP_BUS);
    01920   }
    01921
    01922   assert(cur_stop != NULL);
    01923
    01924   /* don't do the check for drive-through road stops when company bankrupts */
    01925   if (IsDriveThroughStopTile(tile) && (flags & DC_BANKRUPT)) {
    01926     /* remove the 'going through road stop' status from all vehicles on that tile */
    01927     if (flags & DC_EXEC) FindVehicleOnPos(tile, NULL, &ClearRoadStopStatusEnum);
    01928   } else {
    01929     CommandCost ret = EnsureNoVehicleOnGround(tile);
    01930     if (ret.Failed()) return ret;
    01931   }
    01932
    01933   if (flags & DC_EXEC) {
    01934     if (*primary_stop == cur_stop) {
    01935       /* removed the first stop in the list */
    01936       *primary_stop = cur_stop->next;
    01937       /* removed the only stop? */
    01938       if (*primary_stop == NULL) {
    01939         st->facilities &= (is_truck ? ~FACIL_TRUCK_STOP : ~FACIL_BUS_STOP);
    01940       }
    01941     } else {
    01942       /* tell the predecessor in the list to skip this stop */
    01943       RoadStop *pred = *primary_stop;
    01944       while (pred->next != cur_stop) pred = pred->next;
    01945       pred->next = cur_stop->next;
    01946     }
    01947
    01948     /* Update company infrastructure counts. */
    01949     RoadType rt;
    01950     FOR_EACH_SET_ROADTYPE(rt, GetRoadTypes(tile)) {
    01951       Company *c = Company::GetIfValid(GetRoadOwner(tile, rt));
    01952       if (c != NULL) {
    01953         c->infrastructure.road[rt] -= 2;
    01954         DirtyCompanyInfrastructureWindows(c->index);
    01955       }
    01956     }
    01957     Company::Get(st->owner)->infrastructure.station--;
    01958
    01959     if (IsDriveThroughStopTile(tile)) {
    01960       /* Clears the tile for us */
    01961       cur_stop->ClearDriveThrough();
    01962     } else {
    01963       DoClearSquare(tile);
    01964     }
    01965
    01966     SetWindowWidgetDirty(WC_STATION_VIEW, st->index, WID_SV_ROADVEHS);
    01967     delete cur_stop;
    01968
    01969     /* Make sure no vehicle is going to the old roadstop */
    01970     RoadVehicle *v;
    01971     FOR_ALL_ROADVEHICLES(v) {
    01972       if (v->First() == v && v->current_order.IsType(OT_GOTO_STATION) &&
    01973           v->dest_tile == tile) {
    01974         v->dest_tile = v->GetOrderStationLocation(st->index);
    01975       }
    01976     }
    01977
    01978     st->rect.AfterRemoveTile(st, tile);
    01979
    01980     st->UpdateVirtCoord();
    01981     st->RecomputeIndustriesNear();
    01982     DeleteStationIfEmpty(st);
    01983
    01984     /* Update the tile area of the truck/bus stop */
    01985     if (is_truck) {
    01986       st->truck_station.Clear();
    01987       for (const RoadStop *rs = st->truck_stops; rs != NULL; rs = rs->next) st->truck_station.Add(rs->xy);
    01988     } else {
    01989       st->bus_station.Clear();
    01990       for (const RoadStop *rs = st->bus_stops; rs != NULL; rs = rs->next) st->bus_station.Add(rs->xy);
    01991     }
    01992   }
    01993
    01994   return CommandCost(EXPENSES_CONSTRUCTION, _price[is_truck ? PR_CLEAR_STATION_TRUCK : PR_CLEAR_STATION_BUS]);
    01995 }
    01996
    02007 CommandCost CmdRemoveRoadStop(TileIndex tile, DoCommandFlag flags, uint32 p1, uint32 p2, const char *text)
    02008 {
    02009   uint8 width = (uint8)GB(p1, 0, 8);
    02010   uint8 height = (uint8)GB(p1, 8, 8);
    02011
    02012   /* Check for incorrect width / height. */
    02013   if (width == 0 || height == 0) return CMD_ERROR;
    02014   /* Check if the first tile and the last tile are valid */
    02015   if (!IsValidTile(tile) || TileAddWrap(tile, width - 1, height - 1) == INVALID_TILE) return CMD_ERROR;
    02016
    02017   TileArea roadstop_area(tile, width, height);
    02018
    02019   int quantity = 0;
    02020   CommandCost cost(EXPENSES_CONSTRUCTION);
    02021   TILE_AREA_LOOP(cur_tile, roadstop_area) {
    02022     /* Make sure the specified tile is a road stop of the correct type */
    02023     if (!IsTileType(cur_tile, MP_STATION) || !IsRoadStop(cur_tile) || (uint32)GetRoadStopType(cur_tile) != GB(p2, 0, 1)) continue;
    02024
    02025     /* Save the stop info before it is removed */
    02026     bool is_drive_through = IsDriveThroughStopTile(cur_tile);
    02027     RoadTypes rts = GetRoadTypes(cur_tile);
    02028     RoadBits road_bits = IsDriveThroughStopTile(cur_tile) ?
    02029         ((GetRoadStopDir(cur_tile) == DIAGDIR_NE) ? ROAD_X : ROAD_Y) :
    02030         DiagDirToRoadBits(GetRoadStopDir(cur_tile));
    02031
    02032     Owner road_owner = GetRoadOwner(cur_tile, ROADTYPE_ROAD);
    02033     Owner tram_owner = GetRoadOwner(cur_tile, ROADTYPE_TRAM);
    02034     CommandCost ret = RemoveRoadStop(cur_tile, flags);
    02035     if (ret.Failed()) return ret;
    02036     cost.AddCost(ret);
    02037
    02038     quantity++;
    02039     /* If the stop was a drive-through stop replace the road */
    02040     if ((flags & DC_EXEC) && is_drive_through) {
    02041       MakeRoadNormal(cur_tile, road_bits, rts, ClosestTownFromTile(cur_tile, UINT_MAX)->index,
    02042           road_owner, tram_owner);
    02043
    02044       /* Update company infrastructure counts. */
    02045       RoadType rt;
    02046       FOR_EACH_SET_ROADTYPE(rt, rts) {
    02047         Company *c = Company::GetIfValid(GetRoadOwner(cur_tile, rt));
    02048         if (c != NULL) {
    02049           c->infrastructure.road[rt] += CountBits(road_bits);
    02050           DirtyCompanyInfrastructureWindows(c->index);
    02051         }
    02052       }
    02053     }
    02054   }
    02055
    02056   if (quantity == 0) return_cmd_error(STR_ERROR_THERE_IS_NO_STATION);
    02057
    02058   return cost;
    02059 }
    02060
    02067 static uint GetMinimalAirportDistanceToTile(TileIterator &it, TileIndex town_tile)
    02068 {
    02069   uint mindist = UINT_MAX;
    02070
    02071   for (TileIndex cur_tile = it; cur_tile != INVALID_TILE; cur_tile = ++it) {
    02072     mindist = min(mindist, DistanceManhattan(town_tile, cur_tile));
    02073   }
    02074
    02075   return mindist;
    02076 }
    02077
    02087 uint8 GetAirportNoiseLevelForTown(const AirportSpec *as, TileIterator &it, TileIndex town_tile)
    02088 {
    02089   /* 0 cannot be accounted, and 1 is the lowest that can be reduced from town.
    02090    * So no need to go any further*/
    02091   if (as->noise_level < 2) return as->noise_level;
    02092
    02093   uint distance = GetMinimalAirportDistanceToTile(it, town_tile);
    02094
    02095   /* The steps for measuring noise reduction are based on the "magical" (and arbitrary) 8 base distance
    02096    * adding the town_council_tolerance 4 times, as a way to graduate, depending of the tolerance.
    02097    * Basically, it says that the less tolerant a town is, the bigger the distance before
    02098    * an actual decrease can be granted */
    02099   uint8 town_tolerance_distance = 8 + (_settings_game.difficulty.town_council_tolerance * 4);
    02100
    02101   /* now, we want to have the distance segmented using the distance judged bareable by town
    02102    * This will give us the coefficient of reduction the distance provides. */
    02103   uint noise_reduction = distance / town_tolerance_distance;
    02104
    02105   /* If the noise reduction equals the airport noise itself, don't give it for free.
    02106    * Otherwise, simply reduce the airport's level. */
    02107   return noise_reduction >= as->noise_level ? 1 : as->noise_level - noise_reduction;
    02108 }
    02109
    02117 Town *AirportGetNearestTown(const AirportSpec *as, const TileIterator &it)
    02118 {
    02119   Town *t, *nearest = NULL;
    02120   uint add = as->size_x + as->size_y - 2; // GetMinimalAirportDistanceToTile can differ from DistanceManhattan by this much
    02121   uint mindist = UINT_MAX - add; // prevent overflow
    02122   FOR_ALL_TOWNS(t) {
    02123     if (DistanceManhattan(t->xy, it) < mindist + add) { // avoid calling GetMinimalAirportDistanceToTile too often
    02124       TileIterator *copy = it.Clone();
    02125       uint dist = GetMinimalAirportDistanceToTile(*copy, t->xy);
    02126       delete copy;
    02127       if (dist < mindist) {
    02128         nearest = t;
    02129         mindist = dist;
    02130       }
    02131     }
    02132   }
    02133
    02134   return nearest;
    02135 }
    02136
    02137
    02139 void UpdateAirportsNoise()
    02140 {
    02141   Town *t;
    02142   const Station *st;
    02143
    02144   FOR_ALL_TOWNS(t) t->noise_reached = 0;
    02145
    02146   FOR_ALL_STATIONS(st) {
    02147     if (st->airport.tile != INVALID_TILE && st->airport.type != AT_OILRIG) {
    02148       const AirportSpec *as = st->airport.GetSpec();
    02149       AirportTileIterator it(st);
    02150       Town *nearest = AirportGetNearestTown(as, it);
    02151       nearest->noise_reached += GetAirportNoiseLevelForTown(as, it, nearest->xy);
    02152     }
    02153   }
    02154 }
    02155
    02169 CommandCost CmdBuildAirport(TileIndex tile, DoCommandFlag flags, uint32 p1, uint32 p2, const char *text)
    02170 {
    02171   StationID station_to_join = GB(p2, 16, 16);
    02172   bool reuse = (station_to_join != NEW_STATION);
    02173   if (!reuse) station_to_join = INVALID_STATION;
    02174   bool distant_join = (station_to_join != INVALID_STATION);
    02175   byte airport_type = GB(p1, 0, 8);
    02176   byte layout = GB(p1, 8, 8);
    02177
    02178   if (distant_join && (!_settings_game.station.distant_join_stations || !Station::IsValidID(station_to_join))) return CMD_ERROR;
    02179
    02180   if (airport_type >= NUM_AIRPORTS) return CMD_ERROR;
    02181
    02182   CommandCost ret = CheckIfAuthorityAllowsNewStation(tile, flags);
    02183   if (ret.Failed()) return ret;
    02184
    02185   /* Check if a valid, buildable airport was chosen for construction */
    02186   const AirportSpec *as = AirportSpec::Get(airport_type);
    02187   if (!as->IsAvailable() || layout >= as->num_table) return CMD_ERROR;
    02188
    02189   Direction rotation = as->rotation[layout];
    02190   int w = as->size_x;
    02191   int h = as->size_y;
    02192   if (rotation == DIR_E || rotation == DIR_W) Swap(w, h);
    02193   TileArea airport_area = TileArea(tile, w, h);
    02194
    02195   if (w > _settings_game.station.station_spread || h > _settings_game.station.station_spread) {
    02196     return_cmd_error(STR_ERROR_STATION_TOO_SPREAD_OUT);
    02197   }
    02198
    02199   CommandCost cost = CheckFlatLand(airport_area, flags);
    02200   if (cost.Failed()) return cost;
    02201
    02202   /* The noise level is the noise from the airport and reduce it to account for the distance to the town center. */
    02203   AirportTileTableIterator iter(as->table[layout], tile);
    02204   Town *nearest = AirportGetNearestTown(as, iter);
    02205   uint newnoise_level = GetAirportNoiseLevelForTown(as, iter, nearest->xy);
    02206
    02207   /* Check if local auth would allow a new airport */
    02208   StringID authority_refuse_message = STR_NULL;
    02209   Town *authority_refuse_town = NULL;
    02210
    02211   if (_settings_game.economy.station_noise_level) {
    02212     /* do not allow to build a new airport if this raise the town noise over the maximum allowed by town */
    02213     if ((nearest->noise_reached + newnoise_level) > nearest->MaxTownNoise()) {
    02214       authority_refuse_message = STR_ERROR_LOCAL_AUTHORITY_REFUSES_NOISE;
    02215       authority_refuse_town = nearest;
    02216     }
    02217   } else {
    02218     Town *t = ClosestTownFromTile(tile, UINT_MAX);
    02219     uint num = 0;
    02220     const Station *st;
    02221     FOR_ALL_STATIONS(st) {
    02222       if (st->town == t && (st->facilities & FACIL_AIRPORT) && st->airport.type != AT_OILRIG) num++;
    02223     }
    02224     if (num >= 2) {
    02225       authority_refuse_message = STR_ERROR_LOCAL_AUTHORITY_REFUSES_AIRPORT;
    02226       authority_refuse_town = t;
    02227     }
    02228   }
    02229
    02230   if (authority_refuse_message != STR_NULL) {
    02231     SetDParam(0, authority_refuse_town->index);
    02232     return_cmd_error(authority_refuse_message);
    02233   }
    02234
    02235   Station *st = NULL;
    02236   ret = FindJoiningStation(INVALID_STATION, station_to_join, HasBit(p2, 0), airport_area, &st);
    02237   if (ret.Failed()) return ret;
    02238
    02239   /* Distant join */
    02240   if (st == NULL && distant_join) st = Station::GetIfValid(station_to_join);
    02241
    02242   ret = BuildStationPart(&st, flags, reuse, airport_area, (GetAirport(airport_type)->flags & AirportFTAClass::AIRPLANES) ? STATIONNAMING_AIRPORT : STATIONNAMING_HELIPORT);
    02243   if (ret.Failed()) return ret;
    02244
    02245   if (st != NULL && st->airport.tile != INVALID_TILE) {
    02246     return_cmd_error(STR_ERROR_TOO_CLOSE_TO_ANOTHER_AIRPORT);
    02247   }
    02248
    02249   for (AirportTileTableIterator iter(as->table[layout], tile); iter != INVALID_TILE; ++iter) {
    02250     cost.AddCost(_price[PR_BUILD_STATION_AIRPORT]);
    02251   }
    02252
    02253   if (flags & DC_EXEC) {
    02254     /* Always add the noise, so there will be no need to recalculate when option toggles */
    02255     nearest->noise_reached += newnoise_level;
    02256
    02257     st->AddFacility(FACIL_AIRPORT, tile);
    02258     st->airport.type = airport_type;
    02259     st->airport.layout = layout;
    02260     st->airport.flags = 0;
    02261     st->airport.rotation = rotation;
    02262
    02263     st->rect.BeforeAddRect(tile, w, h, StationRect::ADD_TRY);
    02264
    02265     for (AirportTileTableIterator iter(as->table[layout], tile); iter != INVALID_TILE; ++iter) {
    02266       MakeAirport(iter, st->owner, st->index, iter.GetStationGfx(), WATER_CLASS_INVALID);
    02267       SetStationTileRandomBits(iter, GB(Random(), 0, 4));
    02268       st->airport.Add(iter);
    02269
    02270       if (AirportTileSpec::Get(GetTranslatedAirportTileID(iter.GetStationGfx()))->animation.status != ANIM_STATUS_NO_ANIMATION) AddAnimatedTile(iter);
    02271     }
    02272
    02273     /* Only call the animation trigger after all tiles have been built */
    02274     for (AirportTileTableIterator iter(as->table[layout], tile); iter != INVALID_TILE; ++iter) {
    02275       AirportTileAnimationTrigger(st, iter, AAT_BUILT);
    02276     }
    02277
    02278     UpdateAirplanesOnNewStation(st);
    02279
    02280     Company::Get(st->owner)->infrastructure.airport++;
    02281     DirtyCompanyInfrastructureWindows(st->owner);
    02282
    02283     st->UpdateVirtCoord();
    02284     UpdateStationAcceptance(st, false);
    02285     st->RecomputeIndustriesNear();
    02286     InvalidateWindowData(WC_SELECT_STATION, 0, 0);
    02287     InvalidateWindowData(WC_STATION_LIST, st->owner, 0);
    02288     InvalidateWindowData(WC_STATION_VIEW, st->index, -1);
    02289
    02290     if (_settings_game.economy.station_noise_level) {
    02291       SetWindowDirty(WC_TOWN_VIEW, st->town->index);
    02292     }
    02293   }
    02294
    02295   return cost;
    02296 }
    02297
    02304 static CommandCost RemoveAirport(TileIndex tile, DoCommandFlag flags)
    02305 {
    02306   Station *st = Station::GetByTile(tile);
    02307
    02308   if (_current_company != OWNER_WATER) {
    02309     CommandCost ret = CheckOwnership(st->owner);
    02310     if (ret.Failed()) return ret;
    02311   }
    02312
    02313   tile = st->airport.tile;
    02314
    02315   CommandCost cost(EXPENSES_CONSTRUCTION);
    02316
    02317   const Aircraft *a;
    02318   FOR_ALL_AIRCRAFT(a) {
    02319     if (!a->IsNormalAircraft()) continue;
    02320     if (a->targetairport == st->index && a->state != FLYING) return CMD_ERROR;
    02321   }
    02322
    02323   if (flags & DC_EXEC) {
    02324     const AirportSpec *as = st->airport.GetSpec();
    02325     /* The noise level is the noise from the airport and reduce it to account for the distance to the town center.
    02326      * And as for construction, always remove it, even if the setting is not set, in order to avoid the
    02327      * need of recalculation */
    02328     AirportTileIterator it(st);
    02329     Town *nearest = AirportGetNearestTown(as, it);
    02330     nearest->noise_reached -= GetAirportNoiseLevelForTown(as, it, nearest->xy);
    02331   }
    02332
    02333   TILE_AREA_LOOP(tile_cur, st->airport) {
    02334     if (!st->TileBelongsToAirport(tile_cur)) continue;
    02335
    02336     CommandCost ret = EnsureNoVehicleOnGround(tile_cur);
    02337     if (ret.Failed()) return ret;
    02338
    02339     cost.AddCost(_price[PR_CLEAR_STATION_AIRPORT]);
    02340
    02341     if (flags & DC_EXEC) {
    02342       if (IsHangarTile(tile_cur)) OrderBackup::Reset(tile_cur, false);
    02343       DeleteAnimatedTile(tile_cur);
    02344       DoClearSquare(tile_cur);
    02345       DeleteNewGRFInspectWindow(GSF_AIRPORTTILES, tile_cur);
    02346     }
    02347   }
    02348
    02349   if (flags & DC_EXEC) {
    02350     /* Clear the persistent storage. */
    02351     delete st->airport.psa;
    02352
    02353     for (uint i = 0; i < st->airport.GetNumHangars(); ++i) {
    02354       DeleteWindowById(
    02355         WC_VEHICLE_DEPOT, st->airport.GetHangarTile(i)
    02356       );
    02357     }
    02358
    02359     st->rect.AfterRemoveRect(st, st->airport);
    02360
    02361     st->airport.Clear();
    02362     st->facilities &= ~FACIL_AIRPORT;
    02363
    02364     InvalidateWindowData(WC_STATION_VIEW, st->index, -1);
    02365
    02366     if (_settings_game.economy.station_noise_level) {
    02367       SetWindowDirty(WC_TOWN_VIEW, st->town->index);
    02368     }
    02369
    02370     Company::Get(st->owner)->infrastructure.airport--;
    02371     DirtyCompanyInfrastructureWindows(st->owner);
    02372
    02373     st->UpdateVirtCoord();
    02374     st->RecomputeIndustriesNear();
    02375     DeleteStationIfEmpty(st);
    02376     DeleteNewGRFInspectWindow(GSF_AIRPORTS, st->index);
    02377   }
    02378
    02379   return cost;
    02380 }
    02381
    02391 CommandCost CmdOpenCloseAirport(TileIndex tile, DoCommandFlag flags, uint32 p1, uint32 p2, const char *text)
    02392 {
    02393   if (!Station::IsValidID(p1)) return CMD_ERROR;
    02394   Station *st = Station::Get(p1);
    02395
    02396   if (!(st->facilities & FACIL_AIRPORT) || st->owner == OWNER_NONE) return CMD_ERROR;
    02397
    02398   CommandCost ret = CheckOwnership(st->owner);
    02399   if (ret.Failed()) return ret;
    02400
    02401   if (flags & DC_EXEC) {
    02402     st->airport.flags ^= AIRPORT_CLOSED_block;
    02403     SetWindowWidgetDirty(WC_STATION_VIEW, st->index, WID_SV_CLOSE_AIRPORT);
    02404   }
    02405   return CommandCost();
    02406 }
    02407
    02414 bool HasStationInUse(StationID station, bool include_company, CompanyID company)
    02415 {
    02416   const Vehicle *v;
    02417   FOR_ALL_VEHICLES(v) {
    02418     if ((v->owner == company) == include_company) {
    02419       const Order *order;
    02420       FOR_VEHICLE_ORDERS(v, order) {
    02421         if ((order->IsType(OT_GOTO_STATION) || order->IsType(OT_GOTO_WAYPOINT)) && order->GetDestination() == station) {
    02422           return true;
    02423         }
    02424       }
    02425     }
    02426   }
    02427   return false;
    02428 }
    02429
    02430 static const TileIndexDiffC _dock_tileoffs_chkaround[] = {
    02431   {-1,  0},
    02432   { 0,  0},
    02433   { 0,  0},
    02434   { 0, -1}
    02435 };
    02436 static const byte _dock_w_chk[4] = { 2, 1, 2, 1 };
    02437 static const byte _dock_h_chk[4] = { 1, 2, 1, 2 };
    02438
    02448 CommandCost CmdBuildDock(TileIndex tile, DoCommandFlag flags, uint32 p1, uint32 p2, const char *text)
    02449 {
    02450   StationID station_to_join = GB(p2, 16, 16);
    02451   bool reuse = (station_to_join != NEW_STATION);
    02452   if (!reuse) station_to_join = INVALID_STATION;
    02453   bool distant_join = (station_to_join != INVALID_STATION);
    02454
    02455   if (distant_join && (!_settings_game.station.distant_join_stations || !Station::IsValidID(station_to_join))) return CMD_ERROR;
    02456
    02457   DiagDirection direction = GetInclinedSlopeDirection(GetTileSlope(tile));
    02458   if (direction == INVALID_DIAGDIR) return_cmd_error(STR_ERROR_SITE_UNSUITABLE);
    02459   direction = ReverseDiagDir(direction);
    02460
    02461   /* Docks cannot be placed on rapids */
    02462   if (HasTileWaterGround(tile)) return_cmd_error(STR_ERROR_SITE_UNSUITABLE);
    02463
    02464   CommandCost ret = CheckIfAuthorityAllowsNewStation(tile, flags);
    02465   if (ret.Failed()) return ret;
    02466
    02467   if (MayHaveBridgeAbove(tile) && IsBridgeAbove(tile)) return_cmd_error(STR_ERROR_MUST_DEMOLISH_BRIDGE_FIRST);
    02468
    02469   ret = DoCommand(tile, 0, 0, flags, CMD_LANDSCAPE_CLEAR);
    02470   if (ret.Failed()) return ret;
    02471
    02472   TileIndex tile_cur = tile + TileOffsByDiagDir(direction);
    02473
    02474   if (!IsTileType(tile_cur, MP_WATER) || GetTileSlope(tile_cur) != SLOPE_FLAT) {
    02475     return_cmd_error(STR_ERROR_SITE_UNSUITABLE);
    02476   }
    02477
    02478   if (MayHaveBridgeAbove(tile_cur) && IsBridgeAbove(tile_cur)) return_cmd_error(STR_ERROR_MUST_DEMOLISH_BRIDGE_FIRST);
    02479
    02480   /* Get the water class of the water tile before it is cleared.*/
    02481   WaterClass wc = GetWaterClass(tile_cur);
    02482
    02483   ret = DoCommand(tile_cur, 0, 0, flags, CMD_LANDSCAPE_CLEAR);
    02484   if (ret.Failed()) return ret;
    02485
    02486   tile_cur += TileOffsByDiagDir(direction);
    02487   if (!IsTileType(tile_cur, MP_WATER) || GetTileSlope(tile_cur) != SLOPE_FLAT) {
    02488     return_cmd_error(STR_ERROR_SITE_UNSUITABLE);
    02489   }
    02490
    02491   TileArea dock_area = TileArea(tile + ToTileIndexDiff(_dock_tileoffs_chkaround[direction]),
    02492       _dock_w_chk[direction], _dock_h_chk[direction]);
    02493
    02494   /* middle */
    02495   Station *st = NULL;
    02496   ret = FindJoiningStation(INVALID_STATION, station_to_join, HasBit(p1, 0), dock_area, &st);
    02497   if (ret.Failed()) return ret;
    02498
    02499   /* Distant join */
    02500   if (st == NULL && distant_join) st = Station::GetIfValid(station_to_join);
    02501
    02502   ret = BuildStationPart(&st, flags, reuse, dock_area, STATIONNAMING_DOCK);
    02503   if (ret.Failed()) return ret;
    02504
    02505   if (st != NULL && st->dock_tile != INVALID_TILE) return_cmd_error(STR_ERROR_TOO_CLOSE_TO_ANOTHER_DOCK);
    02506
    02507   if (flags & DC_EXEC) {
    02508     st->dock_tile = tile;
    02509     st->AddFacility(FACIL_DOCK, tile);
    02510
    02511     st->rect.BeforeAddRect(dock_area.tile, dock_area.w, dock_area.h, StationRect::ADD_TRY);
    02512
    02513     /* If the water part of the dock is on a canal, update infrastructure counts.
    02514      * This is needed as we've unconditionally cleared that tile before. */
    02515     if (wc == WATER_CLASS_CANAL) {
    02516       Company::Get(st->owner)->infrastructure.water++;
    02517     }
    02518     Company::Get(st->owner)->infrastructure.station += 2;
    02519     DirtyCompanyInfrastructureWindows(st->owner);
    02520
    02521     MakeDock(tile, st->owner, st->index, direction, wc);
    02522
    02523     st->UpdateVirtCoord();
    02524     UpdateStationAcceptance(st, false);
    02525     st->RecomputeIndustriesNear();
    02526     InvalidateWindowData(WC_SELECT_STATION, 0, 0);
    02527     InvalidateWindowData(WC_STATION_LIST, st->owner, 0);
    02528     SetWindowWidgetDirty(WC_STATION_VIEW, st->index, WID_SV_SHIPS);
    02529   }
    02530
    02531   return CommandCost(EXPENSES_CONSTRUCTION, _price[PR_BUILD_STATION_DOCK]);
    02532 }
    02533
    02540 static CommandCost RemoveDock(TileIndex tile, DoCommandFlag flags)
    02541 {
    02542   Station *st = Station::GetByTile(tile);
    02543   CommandCost ret = CheckOwnership(st->owner);
    02544   if (ret.Failed()) return ret;
    02545
    02546   TileIndex docking_location = TILE_ADD(st->dock_tile, ToTileIndexDiff(GetDockOffset(st->dock_tile)));
    02547
    02548   TileIndex tile1 = st->dock_tile;
    02549   TileIndex tile2 = tile1 + TileOffsByDiagDir(GetDockDirection(tile1));
    02550
    02551   ret = EnsureNoVehicleOnGround(tile1);
    02552   if (ret.Succeeded()) ret = EnsureNoVehicleOnGround(tile2);
    02553   if (ret.Failed()) return ret;
    02554
    02555   if (flags & DC_EXEC) {
    02556     DoClearSquare(tile1);
    02557     MarkTileDirtyByTile(tile1);
    02558     MakeWaterKeepingClass(tile2, st->owner);
    02559
    02560     st->rect.AfterRemoveTile(st, tile1);
    02561     st->rect.AfterRemoveTile(st, tile2);
    02562
    02563     st->dock_tile = INVALID_TILE;
    02564     st->facilities &= ~FACIL_DOCK;
    02565
    02566     Company::Get(st->owner)->infrastructure.station -= 2;
    02567     DirtyCompanyInfrastructureWindows(st->owner);
    02568
    02569     SetWindowWidgetDirty(WC_STATION_VIEW, st->index, WID_SV_SHIPS);
    02570     st->UpdateVirtCoord();
    02571     st->RecomputeIndustriesNear();
    02572     DeleteStationIfEmpty(st);
    02573
    02574     /* All ships that were going to our station, can't go to it anymore.
    02575      * Just clear the order, then automatically the next appropriate order
    02576      * will be selected and in case of no appropriate order it will just
    02577      * wander around the world. */
    02578     Ship *s;
    02579     FOR_ALL_SHIPS(s) {
    02580       if (s->current_order.IsType(OT_LOADING) && s->tile == docking_location) {
    02581         s->LeaveStation();
    02582       }
    02583
    02584       if (s->dest_tile == docking_location) {
    02585         s->dest_tile = 0;
    02586         s->current_order.Free();
    02587       }
    02588     }
    02589   }
    02590
    02591   return CommandCost(EXPENSES_CONSTRUCTION, _price[PR_CLEAR_STATION_DOCK]);
    02592 }
    02593
    02594 #include "table/station_land.h"
    02595
    02596 const DrawTileSprites *GetStationTileLayout(StationType st, byte gfx)
    02597 {
    02598   return &_station_display_datas[st][gfx];
    02599 }
    02600
    02610 bool SplitGroundSpriteForOverlay(const TileInfo *ti, SpriteID *ground, RailTrackOffset *overlay_offset)
    02611 {
    02612   bool snow_desert;
    02613   switch (*ground) {
    02614     case SPR_RAIL_TRACK_X:
    02615       snow_desert = false;
    02616       *overlay_offset = RTO_X;
    02617       break;
    02618
    02619     case SPR_RAIL_TRACK_Y:
    02620       snow_desert = false;
    02621       *overlay_offset = RTO_Y;
    02622       break;
    02623
    02624     case SPR_RAIL_TRACK_X_SNOW:
    02625       snow_desert = true;
    02626       *overlay_offset = RTO_X;
    02627       break;
    02628
    02629     case SPR_RAIL_TRACK_Y_SNOW:
    02630       snow_desert = true;
    02631       *overlay_offset = RTO_Y;
    02632       break;
    02633
    02634     default:
    02635       return false;
    02636   }
    02637
    02638   if (ti != NULL) {
    02639     /* Decide snow/desert from tile */
    02640     switch (_settings_game.game_creation.landscape) {
    02641       case LT_ARCTIC:
    02642         snow_desert = (uint)ti->z > GetSnowLine() * TILE_HEIGHT;
    02643         break;
    02644
    02645       case LT_TROPIC:
    02646         snow_desert = GetTropicZone(ti->tile) == TROPICZONE_DESERT;
    02647         break;
    02648
    02649       default:
    02650         break;
    02651     }
    02652   }
    02653
    02654   *ground = snow_desert ? SPR_FLAT_SNOW_DESERT_TILE : SPR_FLAT_GRASS_TILE;
    02655   return true;
    02656 }
    02657
    02658 static void DrawTile_Station(TileInfo *ti)
    02659 {
    02660   const NewGRFSpriteLayout *layout = NULL;
    02661   DrawTileSprites tmp_rail_layout;
    02662   const DrawTileSprites *t = NULL;
    02663   RoadTypes roadtypes;
    02664   int32 total_offset;
    02665   const RailtypeInfo *rti = NULL;
    02666   uint32 relocation = 0;
    02667   uint32 ground_relocation = 0;
    02668   BaseStation *st = NULL;
    02669   const StationSpec *statspec = NULL;
    02670   uint tile_layout = 0;
    02671
    02672   if (HasStationRail(ti->tile)) {
    02673     rti = GetRailTypeInfo(GetRailType(ti->tile));
    02674     roadtypes = ROADTYPES_NONE;
    02675     total_offset = rti->GetRailtypeSpriteOffset();
    02676
    02677     if (IsCustomStationSpecIndex(ti->tile)) {
    02678       /* look for customization */
    02679       st = BaseStation::GetByTile(ti->tile);
    02680       statspec = st->speclist[GetCustomStationSpecIndex(ti->tile)].spec;
    02681
    02682       if (statspec != NULL) {
    02683         tile_layout = GetStationGfx(ti->tile);
    02684
    02685         if (HasBit(statspec->callback_mask, CBM_STATION_SPRITE_LAYOUT)) {
    02686           uint16 callback = GetStationCallback(CBID_STATION_SPRITE_LAYOUT, 0, 0, statspec, st, ti->tile);
    02687           if (callback != CALLBACK_FAILED) tile_layout = (callback & ~1) + GetRailStationAxis(ti->tile);
    02688         }
    02689
    02690         /* Ensure the chosen tile layout is valid for this custom station */
    02691         if (statspec->renderdata != NULL) {
    02692           layout = &statspec->renderdata[tile_layout < statspec->tiles ? tile_layout : (uint)GetRailStationAxis(ti->tile)];
    02693           if (!layout->NeedsPreprocessing()) {
    02694             t = layout;
    02695             layout = NULL;
    02696           }
    02697         }
    02698       }
    02699     }
    02700   } else {
    02701     roadtypes = IsRoadStop(ti->tile) ? GetRoadTypes(ti->tile) : ROADTYPES_NONE;
    02702     total_offset = 0;
    02703   }
    02704
    02705   StationGfx gfx = GetStationGfx(ti->tile);
    02706   if (IsAirport(ti->tile)) {
    02707     gfx = GetAirportGfx(ti->tile);
    02708     if (gfx >= NEW_AIRPORTTILE_OFFSET) {
    02709       const AirportTileSpec *ats = AirportTileSpec::Get(gfx);
    02710       if (ats->grf_prop.spritegroup[0] != NULL && DrawNewAirportTile(ti, Station::GetByTile(ti->tile), gfx, ats)) {
    02711         return;
    02712       }
    02713       /* No sprite group (or no valid one) found, meaning no graphics associated.
    02714        * Use the substitute one instead */
    02715       assert(ats->grf_prop.subst_id != INVALID_AIRPORTTILE);
    02716       gfx = ats->grf_prop.subst_id;
    02717     }
    02718     switch (gfx) {
    02719       case APT_RADAR_GRASS_FENCE_SW:
    02720         t = &_station_display_datas_airport_radar_grass_fence_sw[GetAnimationFrame(ti->tile)];
    02721         break;
    02722       case APT_GRASS_FENCE_NE_FLAG:
    02723         t = &_station_display_datas_airport_flag_grass_fence_ne[GetAnimationFrame(ti->tile)];
    02724         break;
    02725       case APT_RADAR_FENCE_SW:
    02726         t = &_station_display_datas_airport_radar_fence_sw[GetAnimationFrame(ti->tile)];
    02727         break;
    02728       case APT_RADAR_FENCE_NE:
    02729         t = &_station_display_datas_airport_radar_fence_ne[GetAnimationFrame(ti->tile)];
    02730         break;
    02731       case APT_GRASS_FENCE_NE_FLAG_2:
    02732         t = &_station_display_datas_airport_flag_grass_fence_ne_2[GetAnimationFrame(ti->tile)];
    02733         break;
    02734     }
    02735   }
    02736
    02737   Owner owner = GetTileOwner(ti->tile);
    02738
    02739   PaletteID palette;
    02740   if (Company::IsValidID(owner)) {
    02741     palette = COMPANY_SPRITE_COLOUR(owner);
    02742   } else {
    02743     /* Some stations are not owner by a company, namely oil rigs */
    02744     palette = PALETTE_TO_GREY;
    02745   }
    02746
    02747   if (layout == NULL && (t == NULL || t->seq == NULL)) t = GetStationTileLayout(GetStationType(ti->tile), gfx);
    02748
    02749   /* don't show foundation for docks */
    02750   if (ti->tileh != SLOPE_FLAT && !IsDock(ti->tile)) {
    02751     if (statspec != NULL && HasBit(statspec->flags, SSF_CUSTOM_FOUNDATIONS)) {
    02752       /* Station has custom foundations.
    02753        * Check whether the foundation continues beyond the tile's upper sides. */
    02754       uint edge_info = 0;
    02755       int z;
    02756       Slope slope = GetFoundationPixelSlope(ti->tile, &z);
    02757       if (!HasFoundationNW(ti->tile, slope, z)) SetBit(edge_info, 0);
    02758       if (!HasFoundationNE(ti->tile, slope, z)) SetBit(edge_info, 1);
    02759       SpriteID image = GetCustomStationFoundationRelocation(statspec, st, ti->tile, tile_layout, edge_info);
    02760       if (image == 0) goto draw_default_foundation;
    02761
    02762       if (HasBit(statspec->flags, SSF_EXTENDED_FOUNDATIONS)) {
    02763         /* Station provides extended foundations. */
    02764
    02765         static const uint8 foundation_parts[] = {
    02766           0, 0, 0, 0, // Invalid,  Invalid,   Invalid,   SLOPE_SW
    02767           0, 1, 2, 3, // Invalid,  SLOPE_EW,  SLOPE_SE,  SLOPE_WSE
    02768           0, 4, 5, 6, // Invalid,  SLOPE_NW,  SLOPE_NS,  SLOPE_NWS
    02769           7, 8, 9     // SLOPE_NE, SLOPE_ENW, SLOPE_SEN
    02770         };
    02771
    02772         AddSortableSpriteToDraw(image + foundation_parts[ti->tileh], PAL_NONE, ti->x, ti->y, 16, 16, 7, ti->z);
    02773       } else {
    02774         /* Draw simple foundations, built up from 8 possible foundation sprites. */
    02775
    02776         /* Each set bit represents one of the eight composite sprites to be drawn.
    02777          * 'Invalid' entries will not drawn but are included for completeness. */
    02778         static const uint8 composite_foundation_parts[] = {
    02779           /* Invalid  (00000000), Invalid   (11010001), Invalid   (11100100), SLOPE_SW  (11100000) */
    02780              0x00,                0xD1,                 0xE4,                 0xE0,
    02781           /* Invalid  (11001010), SLOPE_EW  (11001001), SLOPE_SE  (11000100), SLOPE_WSE (11000000) */
    02782              0xCA,                0xC9,                 0xC4,                 0xC0,
    02783           /* Invalid  (11010010), SLOPE_NW  (10010001), SLOPE_NS  (11100100), SLOPE_NWS (10100000) */
    02784              0xD2,                0x91,                 0xE4,                 0xA0,
    02785           /* SLOPE_NE (01001010), SLOPE_ENW (00001001), SLOPE_SEN (01000100) */
    02786              0x4A,                0x09,                 0x44
    02787         };
    02788
    02789         uint8 parts = composite_foundation_parts[ti->tileh];
    02790
    02791         /* If foundations continue beyond the tile's upper sides then
    02792          * mask out the last two pieces. */
    02793         if (HasBit(edge_info, 0)) ClrBit(parts, 6);
    02794         if (HasBit(edge_info, 1)) ClrBit(parts, 7);
    02795
    02796         if (parts == 0) {
    02797           /* We always have to draw at least one sprite to make sure there is a boundingbox and a sprite with the
    02798            * correct offset for the childsprites.
    02799            * So, draw the (completely empty) sprite of the default foundations. */
    02800           goto draw_default_foundation;
    02801         }
    02802
    02803         StartSpriteCombine();
    02804         for (int i = 0; i < 8; i++) {
    02805           if (HasBit(parts, i)) {
    02806             AddSortableSpriteToDraw(image + i, PAL_NONE, ti->x, ti->y, 16, 16, 7, ti->z);
    02807           }
    02808         }
    02809         EndSpriteCombine();
    02810       }
    02811
    02812       OffsetGroundSprite(31, 1);
    02813       ti->z += ApplyPixelFoundationToSlope(FOUNDATION_LEVELED, &ti->tileh);
    02814     } else {
    02815 draw_default_foundation:
    02816       DrawFoundation(ti, FOUNDATION_LEVELED);
    02817     }
    02818   }
    02819
    02820   if (IsBuoy(ti->tile)) {
    02821     DrawWaterClassGround(ti);
    02822     SpriteID sprite = GetCanalSprite(CF_BUOY, ti->tile);
    02823     if (sprite != 0) total_offset = sprite - SPR_IMG_BUOY;
    02824   } else if (IsDock(ti->tile) || (IsOilRig(ti->tile) && IsTileOnWater(ti->tile))) {
    02825     if (ti->tileh == SLOPE_FLAT) {
    02826       DrawWaterClassGround(ti);
    02827     } else {
    02828       assert(IsDock(ti->tile));
    02829       TileIndex water_tile = ti->tile + TileOffsByDiagDir(GetDockDirection(ti->tile));
    02830       WaterClass wc = GetWaterClass(water_tile);
    02831       if (wc == WATER_CLASS_SEA) {
    02832         DrawShoreTile(ti->tileh);
    02833       } else {
    02834         DrawClearLandTile(ti, 3);
    02835       }
    02836     }
    02837   } else {
    02838     if (layout != NULL) {
    02839       /* Sprite layout which needs preprocessing */
    02840       bool separate_ground = HasBit(statspec->flags, SSF_SEPARATE_GROUND);
    02841       uint32 var10_values = layout->PrepareLayout(total_offset, rti->fallback_railtype, 0, 0, separate_ground);
    02842       uint8 var10;
    02843       FOR_EACH_SET_BIT(var10, var10_values) {
    02844         uint32 var10_relocation = GetCustomStationRelocation(statspec, st, ti->tile, var10);
    02845         layout->ProcessRegisters(var10, var10_relocation, separate_ground);
    02846       }
    02847       tmp_rail_layout.seq = layout->GetLayout(&tmp_rail_layout.ground);
    02848       t = &tmp_rail_layout;
    02849       total_offset = 0;
    02850     } else if (statspec != NULL) {
    02851       /* Simple sprite layout */
    02852       ground_relocation = relocation = GetCustomStationRelocation(statspec, st, ti->tile, 0);
    02853       if (HasBit(statspec->flags, SSF_SEPARATE_GROUND)) {
    02854         ground_relocation = GetCustomStationRelocation(statspec, st, ti->tile, 1);
    02855       }
    02856       ground_relocation += rti->fallback_railtype;
    02857     }
    02858
    02859     SpriteID image = t->ground.sprite;
    02860     PaletteID pal  = t->ground.pal;
    02861     RailTrackOffset overlay_offset;
    02862     if (rti != NULL && rti->UsesOverlay() && SplitGroundSpriteForOverlay(ti, &image, &overlay_offset)) {
    02863       SpriteID ground = GetCustomRailSprite(rti, ti->tile, RTSG_GROUND);
    02864       DrawGroundSprite(image, PAL_NONE);
    02865       DrawGroundSprite(ground + overlay_offset, PAL_NONE);
    02866
    02867       if (_game_mode != GM_MENU && _settings_client.gui.show_track_reservation && HasStationReservation(ti->tile)) {
    02868         SpriteID overlay = GetCustomRailSprite(rti, ti->tile, RTSG_OVERLAY);
    02869         DrawGroundSprite(overlay + overlay_offset, PALETTE_CRASH);
    02870       }
    02871     } else {
    02872       image += HasBit(image, SPRITE_MODIFIER_CUSTOM_SPRITE) ? ground_relocation : total_offset;
    02873       if (HasBit(pal, SPRITE_MODIFIER_CUSTOM_SPRITE)) pal += ground_relocation;
    02874       DrawGroundSprite(image, GroundSpritePaletteTransform(image, pal, palette));
    02875
    02876       /* PBS debugging, draw reserved tracks darker */
    02877       if (_game_mode != GM_MENU && _settings_client.gui.show_track_reservation && HasStationRail(ti->tile) && HasStationReservation(ti->tile)) {
    02878         const RailtypeInfo *rti = GetRailTypeInfo(GetRailType(ti->tile));
    02879         DrawGroundSprite(GetRailStationAxis(ti->tile) == AXIS_X ? rti->base_sprites.single_x : rti->base_sprites.single_y, PALETTE_CRASH);
    02880       }
    02881     }
    02882   }
    02883
    02884   if (HasStationRail(ti->tile) && HasCatenaryDrawn(GetRailType(ti->tile))) DrawCatenary(ti);
    02885
    02886   if (HasBit(roadtypes, ROADTYPE_TRAM)) {
    02887     Axis axis = GetRoadStopDir(ti->tile) == DIAGDIR_NE ? AXIS_X : AXIS_Y;
    02888     DrawGroundSprite((HasBit(roadtypes, ROADTYPE_ROAD) ? SPR_TRAMWAY_OVERLAY : SPR_TRAMWAY_TRAM) + (axis ^ 1), PAL_NONE);
    02889     DrawTramCatenary(ti, axis == AXIS_X ? ROAD_X : ROAD_Y);
    02890   }
    02891
    02892   if (IsRailWaypoint(ti->tile)) {
    02893     /* Don't offset the waypoint graphics; they're always the same. */
    02894     total_offset = 0;
    02895   }
    02896
    02897   DrawRailTileSeq(ti, t, TO_BUILDINGS, total_offset, relocation, palette);
    02898 }
    02899
    02900 void StationPickerDrawSprite(int x, int y, StationType st, RailType railtype, RoadType roadtype, int image)
    02901 {
    02902   int32 total_offset = 0;
    02903   PaletteID pal = COMPANY_SPRITE_COLOUR(_local_company);
    02904   const DrawTileSprites *t = GetStationTileLayout(st, image);
    02905   const RailtypeInfo *rti = NULL;
    02906
    02907   if (railtype != INVALID_RAILTYPE) {
    02908     rti = GetRailTypeInfo(railtype);
    02909     total_offset = rti->GetRailtypeSpriteOffset();
    02910   }
    02911
    02912   SpriteID img = t->ground.sprite;
    02913   RailTrackOffset overlay_offset;
    02914   if (rti != NULL && rti->UsesOverlay() && SplitGroundSpriteForOverlay(NULL, &img, &overlay_offset)) {
    02915     SpriteID ground = GetCustomRailSprite(rti, INVALID_TILE, RTSG_GROUND);
    02916     DrawSprite(img, PAL_NONE, x, y);
    02917     DrawSprite(ground + overlay_offset, PAL_NONE, x, y);
    02918   } else {
    02919     DrawSprite(img + total_offset, HasBit(img, PALETTE_MODIFIER_COLOUR) ? pal : PAL_NONE, x, y);
    02920   }
    02921
    02922   if (roadtype == ROADTYPE_TRAM) {
    02923     DrawSprite(SPR_TRAMWAY_TRAM + (t->ground.sprite == SPR_ROAD_PAVED_STRAIGHT_X ? 1 : 0), PAL_NONE, x, y);
    02924   }
    02925
    02926   /* Default waypoint has no railtype specific sprites */
    02927   DrawRailTileSeqInGUI(x, y, t, st == STATION_WAYPOINT ? 0 : total_offset, 0, pal);
    02928 }
    02929
    02930 static int GetSlopePixelZ_Station(TileIndex tile, uint x, uint y)
    02931 {
    02932   return GetTileMaxPixelZ(tile);
    02933 }
    02934
    02935 static Foundation GetFoundation_Station(TileIndex tile, Slope tileh)
    02936 {
    02937   return FlatteningFoundation(tileh);
    02938 }
    02939
    02940 static void GetTileDesc_Station(TileIndex tile, TileDesc *td)
    02941 {
    02942   td->owner[0] = GetTileOwner(tile);
    02943   if (IsDriveThroughStopTile(tile)) {
    02944     Owner road_owner = INVALID_OWNER;
    02945     Owner tram_owner = INVALID_OWNER;
    02946     RoadTypes rts = GetRoadTypes(tile);
    02947     if (HasBit(rts, ROADTYPE_ROAD)) road_owner = GetRoadOwner(tile, ROADTYPE_ROAD);
    02948     if (HasBit(rts, ROADTYPE_TRAM)) tram_owner = GetRoadOwner(tile, ROADTYPE_TRAM);
    02949
    02950     /* Is there a mix of owners? */
    02951     if ((tram_owner != INVALID_OWNER && tram_owner != td->owner[0]) ||
    02952         (road_owner != INVALID_OWNER && road_owner != td->owner[0])) {
    02953       uint i = 1;
    02954       if (road_owner != INVALID_OWNER) {
    02955         td->owner_type[i] = STR_LAND_AREA_INFORMATION_ROAD_OWNER;
    02956         td->owner[i] = road_owner;
    02957         i++;
    02958       }
    02959       if (tram_owner != INVALID_OWNER) {
    02960         td->owner_type[i] = STR_LAND_AREA_INFORMATION_TRAM_OWNER;
    02961         td->owner[i] = tram_owner;
    02962       }
    02963     }
    02964   }
    02965   td->build_date = BaseStation::GetByTile(tile)->build_date;
    02966
    02967   if (HasStationTileRail(tile)) {
    02968     const StationSpec *spec = GetStationSpec(tile);
    02969
    02970     if (spec != NULL) {
    02971       td->station_class = StationClass::Get(spec->cls_id)->name;
    02972       td->station_name  = spec->name;
    02973
    02974       if (spec->grf_prop.grffile != NULL) {
    02975         const GRFConfig *gc = GetGRFConfig(spec->grf_prop.grffile->grfid);
    02976         td->grf = gc->GetName();
    02977       }
    02978     }
    02979
    02980     const RailtypeInfo *rti = GetRailTypeInfo(GetRailType(tile));
    02981     td->rail_speed = rti->max_speed;
    02982   }
    02983
    02984   if (IsAirport(tile)) {
    02985     const AirportSpec *as = Station::GetByTile(tile)->airport.GetSpec();
    02986     td->airport_class = AirportClass::Get(as->cls_id)->name;
    02987     td->airport_name = as->name;
    02988
    02989     const AirportTileSpec *ats = AirportTileSpec::GetByTile(tile);
    02990     td->airport_tile_name = ats->name;
    02991
    02992     if (as->grf_prop.grffile != NULL) {
    02993       const GRFConfig *gc = GetGRFConfig(as->grf_prop.grffile->grfid);
    02994       td->grf = gc->GetName();
    02995     } else if (ats->grf_prop.grffile != NULL) {
    02996       const GRFConfig *gc = GetGRFConfig(ats->grf_prop.grffile->grfid);
    02997       td->grf = gc->GetName();
    02998     }
    02999   }
    03000
    03001   StringID str;
    03002   switch (GetStationType(tile)) {
    03003     default: NOT_REACHED();
    03004     case STATION_RAIL:     str = STR_LAI_STATION_DESCRIPTION_RAILROAD_STATION; break;
    03005     case STATION_AIRPORT:
    03006       str = (IsHangar(tile) ? STR_LAI_STATION_DESCRIPTION_AIRCRAFT_HANGAR : STR_LAI_STATION_DESCRIPTION_AIRPORT);
    03007       break;
    03008     case STATION_TRUCK:    str = STR_LAI_STATION_DESCRIPTION_TRUCK_LOADING_AREA; break;
    03009     case STATION_BUS:      str = STR_LAI_STATION_DESCRIPTION_BUS_STATION; break;
    03010     case STATION_OILRIG:   str = STR_INDUSTRY_NAME_OIL_RIG; break;
    03011     case STATION_DOCK:     str = STR_LAI_STATION_DESCRIPTION_SHIP_DOCK; break;
    03012     case STATION_BUOY:     str = STR_LAI_STATION_DESCRIPTION_BUOY; break;
    03013     case STATION_WAYPOINT: str = STR_LAI_STATION_DESCRIPTION_WAYPOINT; break;
    03014   }
    03015   td->str = str;
    03016 }
    03017
    03018
    03019 static TrackStatus GetTileTrackStatus_Station(TileIndex tile, TransportType mode, uint sub_mode, DiagDirection side)
    03020 {
    03021   TrackBits trackbits = TRACK_BIT_NONE;
    03022
    03023   switch (mode) {
    03024     case TRANSPORT_RAIL:
    03025       if (HasStationRail(tile) && !IsStationTileBlocked(tile)) {
    03026         trackbits = TrackToTrackBits(GetRailStationTrack(tile));
    03027       }
    03028       break;
    03029
    03030     case TRANSPORT_WATER:
    03031       /* buoy is coded as a station, it is always on open water */
    03032       if (IsBuoy(tile)) {
    03033         trackbits = TRACK_BIT_ALL;
    03034         /* remove tracks that connect NE map edge */
    03035         if (TileX(tile) == 0) trackbits &= ~(TRACK_BIT_X | TRACK_BIT_UPPER | TRACK_BIT_RIGHT);
    03036         /* remove tracks that connect NW map edge */
    03037         if (TileY(tile) == 0) trackbits &= ~(TRACK_BIT_Y | TRACK_BIT_LEFT | TRACK_BIT_UPPER);
    03038       }
    03039       break;
    03040
    03041     case TRANSPORT_ROAD:
    03042       if ((GetRoadTypes(tile) & sub_mode) != 0 && IsRoadStop(tile)) {
    03043         DiagDirection dir = GetRoadStopDir(tile);
    03044         Axis axis = DiagDirToAxis(dir);
    03045
    03046         if (side != INVALID_DIAGDIR) {
    03047           if (axis != DiagDirToAxis(side) || (IsStandardRoadStopTile(tile) && dir != side)) break;
    03048         }
    03049
    03050         trackbits = AxisToTrackBits(axis);
    03051       }
    03052       break;
    03053
    03054     default:
    03055       break;
    03056   }
    03057
    03058   return CombineTrackStatus(TrackBitsToTrackdirBits(trackbits), TRACKDIR_BIT_NONE);
    03059 }
    03060
    03061
    03062 static void TileLoop_Station(TileIndex tile)
    03063 {
    03064   /* FIXME -- GetTileTrackStatus_Station -> animated stationtiles
    03065    * hardcoded.....not good */
    03066   switch (GetStationType(tile)) {
    03067     case STATION_AIRPORT:
    03068       AirportTileAnimationTrigger(Station::GetByTile(tile), tile, AAT_TILELOOP);
    03069       break;
    03070
    03071     case STATION_DOCK:
    03072       if (GetTileSlope(tile) != SLOPE_FLAT) break; // only handle water part
    03073       /* FALL THROUGH */
    03074     case STATION_OILRIG: //(station part)
    03075     case STATION_BUOY:
    03076       TileLoop_Water(tile);
    03077       break;
    03078
    03079     default: break;
    03080   }
    03081 }
    03082
    03083
    03084 static void AnimateTile_Station(TileIndex tile)
    03085 {
    03086   if (HasStationRail(tile)) {
    03087     AnimateStationTile(tile);
    03088     return;
    03089   }
    03090
    03091   if (IsAirport(tile)) {
    03092     AnimateAirportTile(tile);
    03093   }
    03094 }
    03095
    03096
    03097 static bool ClickTile_Station(TileIndex tile)
    03098 {
    03099   const BaseStation *bst = BaseStation::GetByTile(tile);
    03100
    03101   if (bst->facilities & FACIL_WAYPOINT) {
    03102     ShowWaypointWindow(Waypoint::From(bst));
    03103   } else if (IsHangar(tile)) {
    03104     const Station *st = Station::From(bst);
    03105     ShowDepotWindow(st->airport.GetHangarTile(st->airport.GetHangarNum(tile)), VEH_AIRCRAFT);
    03106   } else {
    03107     ShowStationViewWindow(bst->index);
    03108   }
    03109   return true;
    03110 }
    03111
    03112 static VehicleEnterTileStatus VehicleEnter_Station(Vehicle *v, TileIndex tile, int x, int y)
    03113 {
    03114   if (v->type == VEH_TRAIN) {
    03115     StationID station_id = GetStationIndex(tile);
    03116     if (!v->current_order.ShouldStopAtStation(v, station_id)) return VETSB_CONTINUE;
    03117     if (!IsRailStation(tile) || !v->IsFrontEngine()) return VETSB_CONTINUE;
    03118
    03119     int station_ahead;
    03120     int station_length;
    03121     int stop = GetTrainStopLocation(station_id, tile, Train::From(v), &station_ahead, &station_length);
    03122
    03123     /* Stop whenever that amount of station ahead + the distance from the
    03124      * begin of the platform to the stop location is longer than the length
    03125      * of the platform. Station ahead 'includes' the current tile where the
    03126      * vehicle is on, so we need to subtract that. */
    03127     if (!IsInsideBS(stop + station_ahead, station_length, TILE_SIZE)) return VETSB_CONTINUE;
    03128
    03129     DiagDirection dir = DirToDiagDir(v->direction);
    03130
    03131     x &= 0xF;
    03132     y &= 0xF;
    03133
    03134     if (DiagDirToAxis(dir) != AXIS_X) Swap(x, y);
    03135     if (y == TILE_SIZE / 2) {
    03136       if (dir != DIAGDIR_SE && dir != DIAGDIR_SW) x = TILE_SIZE - 1 - x;
    03137       stop &= TILE_SIZE - 1;
    03138
    03139       if (x == stop) return VETSB_ENTERED_STATION | (VehicleEnterTileStatus)(station_id << VETS_STATION_ID_OFFSET); // enter station
    03140       if (x < stop) {
    03141         uint16 spd;
    03142
    03143         v->vehstatus |= VS_TRAIN_SLOWING;
    03144         spd = max(0, (stop - x) * 20 - 15);
    03145         if (spd < v->cur_speed) v->cur_speed = spd;
    03146       }
    03147     }
    03148   } else if (v->type == VEH_ROAD) {
    03149     RoadVehicle *rv = RoadVehicle::From(v);
    03150     if (rv->state < RVSB_IN_ROAD_STOP && !IsReversingRoadTrackdir((Trackdir)rv->state) && rv->frame == 0) {
    03151       if (IsRoadStop(tile) && rv->IsFrontEngine()) {
    03152         /* Attempt to allocate a parking bay in a road stop */
    03153         return RoadStop::GetByTile(tile, GetRoadStopType(tile))->Enter(rv) ? VETSB_CONTINUE : VETSB_CANNOT_ENTER;
    03154       }
    03155     }
    03156   }
    03157
    03158   return VETSB_CONTINUE;
    03159 }
    03160
    03165 void TriggerWatchedCargoCallbacks(Station *st)
    03166 {
    03167   /* Collect cargoes accepted since the last big tick. */
    03168   uint cargoes = 0;
    03169   for (CargoID cid = 0; cid < NUM_CARGO; cid++) {
    03170     if (HasBit(st->goods[cid].acceptance_pickup, GoodsEntry::GES_ACCEPTED_BIGTICK)) SetBit(cargoes, cid);
    03171   }
    03172
    03173   /* Anything to do? */
    03174   if (cargoes == 0) return;
    03175
    03176   /* Loop over all houses in the catchment. */
    03177   Rect r = st->GetCatchmentRect();
    03178   TileArea ta(TileXY(r.left, r.top), TileXY(r.right, r.bottom));
    03179   TILE_AREA_LOOP(tile, ta) {
    03180     if (IsTileType(tile, MP_HOUSE)) {
    03181       WatchedCargoCallback(tile, cargoes);
    03182     }
    03183   }
    03184 }
    03185
    03192 static bool StationHandleBigTick(BaseStation *st)
    03193 {
    03194   if (!st->IsInUse()) {
    03195     if (++st->delete_ctr >= 8) delete st;
    03196     return false;
    03197   }
    03198
    03199   if (Station::IsExpected(st)) {
    03200     TriggerWatchedCargoCallbacks(Station::From(st));
    03201
    03202     for (CargoID i = 0; i < NUM_CARGO; i++) {
    03203       ClrBit(Station::From(st)->goods[i].acceptance_pickup, GoodsEntry::GES_ACCEPTED_BIGTICK);
    03204     }
    03205   }
    03206
    03207
    03208   if ((st->facilities & FACIL_WAYPOINT) == 0) UpdateStationAcceptance(Station::From(st), true);
    03209
    03210   return true;
    03211 }
    03212
    03213 static inline void byte_inc_sat(byte *p)
    03214 {
    03215   byte b = *p + 1;
    03216   if (b != 0) *p = b;
    03217 }
    03218
    03219 static void UpdateStationRating(Station *st)
    03220 {
    03221   bool waiting_changed = false;
    03222
    03223   byte_inc_sat(&st->time_since_load);
    03224   byte_inc_sat(&st->time_since_unload);
    03225
    03226   const CargoSpec *cs;
    03227   FOR_ALL_CARGOSPECS(cs) {
    03228     GoodsEntry *ge = &st->goods[cs->Index()];
    03229     /* Slowly increase the rating back to his original level in the case we
    03230      *  didn't deliver cargo yet to this station. This happens when a bribe
    03231      *  failed while you didn't moved that cargo yet to a station. */
    03232     if (!ge->HasRating() && ge->rating < INITIAL_STATION_RATING) {
    03233       ge->rating++;
    03234     }
    03235
    03236     /* Only change the rating if we are moving this cargo */
    03237     if (ge->HasRating()) {
    03238       byte_inc_sat(&ge->time_since_pickup);
    03239
    03240       bool skip = false;
    03241       int rating = 0;
    03242       uint waiting = ge->cargo.TotalCount();
    03243
    03244       /* num_dests is at least 1 if there is any cargo as
    03245        * INVALID_STATION is also a destination.
    03246        */
    03247       uint num_dests = (uint)ge->cargo.Packets()->MapSize();
    03248
    03249       /* Average amount of cargo per next hop, but prefer solitary stations
    03250        * with only one or two next hops. They are allowed to have more
    03251        * cargo waiting per next hop.
    03252        * With manual cargo distribution waiting_avg = waiting / 2 as then
    03253        * INVALID_STATION is the only destination.
    03254        */
    03255       uint waiting_avg = waiting / (num_dests + 1);
    03256
    03257       if (HasBit(cs->callback_mask, CBM_CARGO_STATION_RATING_CALC)) {
    03258         /* Perform custom station rating. If it succeeds the speed, days in transit and
    03259          * waiting cargo ratings must not be executed. */
    03260
    03261         /* NewGRFs expect last speed to be 0xFF when no vehicle has arrived yet. */
    03262         uint last_speed = ge->HasVehicleEverTriedLoading() ? ge->last_speed : 0xFF;
    03263
    03264         uint32 var18 = min(ge->time_since_pickup, 0xFF) | (min(ge->max_waiting_cargo, 0xFFFF) << 8) | (min(last_speed, 0xFF) << 24);
    03265         /* Convert to the 'old' vehicle types */
    03266         uint32 var10 = (st->last_vehicle_type == VEH_INVALID) ? 0x0 : (st->last_vehicle_type + 0x10);
    03267         uint16 callback = GetCargoCallback(CBID_CARGO_STATION_RATING_CALC, var10, var18, cs);
    03268         if (callback != CALLBACK_FAILED) {
    03269           skip = true;
    03270           rating = GB(callback, 0, 14);
    03271
    03272           /* Simulate a 15 bit signed value */
    03273           if (HasBit(callback, 14)) rating -= 0x4000;
    03274         }
    03275       }
    03276
    03277       if (!skip) {
    03278         int b = ge->last_speed - 85;
    03279         if (b >= 0) rating += b >> 2;
    03280
    03281         byte waittime = ge->time_since_pickup;
    03282         if (st->last_vehicle_type == VEH_SHIP) waittime >>= 2;
    03283         (waittime > 21) ||
    03284         (rating += 25, waittime > 12) ||
    03285         (rating += 25, waittime > 6) ||
    03286         (rating += 45, waittime > 3) ||
    03287         (rating += 35, true);
    03288
    03289         (rating -= 90, ge->max_waiting_cargo > 1500) ||
    03290         (rating += 55, ge->max_waiting_cargo > 1000) ||
    03291         (rating += 35, ge->max_waiting_cargo > 600) ||
    03292         (rating += 10, ge->max_waiting_cargo > 300) ||
    03293         (rating += 20, ge->max_waiting_cargo > 100) ||
    03294         (rating += 10, true);
    03295       }
    03296
    03297       if (Company::IsValidID(st->owner) && HasBit(st->town->statues, st->owner)) rating += 26;
    03298
    03299       byte age = ge->last_age;
    03300       (age >= 3) ||
    03301       (rating += 10, age >= 2) ||
    03302       (rating += 10, age >= 1) ||
    03303       (rating += 13, true);
    03304
    03305       {
    03306         int or_ = ge->rating; // old rating
    03307
    03308         /* only modify rating in steps of -2, -1, 0, 1 or 2 */
    03309         ge->rating = rating = or_ + Clamp(Clamp(rating, 0, 255) - or_, -2, 2);
    03310
    03311         /* if rating is <= 64 and more than 100 items waiting on average per destination,
    03312          * remove some random amount of goods from the station */
    03313         if (rating <= 64 && waiting_avg >= 100) {
    03314           int dec = Random() & 0x1F;
    03315           if (waiting_avg < 200) dec &= 7;
    03316           waiting -= (dec + 1) * num_dests;
    03317           waiting_changed = true;
    03318         }
    03319
    03320         /* if rating is <= 127 and there are any items waiting, maybe remove some goods. */
    03321         if (rating <= 127 && waiting != 0) {
    03322           uint32 r = Random();
    03323           if (rating <= (int)GB(r, 0, 7)) {
    03324             /* Need to have int, otherwise it will just overflow etc. */
    03325             waiting = max((int)waiting - (int)((GB(r, 8, 2) - 1) * num_dests), 0);
    03326             waiting_changed = true;
    03327           }
    03328         }
    03329
    03330         /* At some point we really must cap the cargo. Previously this
    03331          * was a strict 4095, but now we'll have a less strict, but
    03332          * increasingly aggressive truncation of the amount of cargo. */
    03333         static const uint WAITING_CARGO_THRESHOLD  = 1 << 12;
    03334         static const uint WAITING_CARGO_CUT_FACTOR = 1 <<  6;
    03335         static const uint MAX_WAITING_CARGO        = 1 << 15;
    03336
    03337         if (waiting > WAITING_CARGO_THRESHOLD) {
    03338           uint difference = waiting - WAITING_CARGO_THRESHOLD;
    03339           waiting -= (difference / WAITING_CARGO_CUT_FACTOR);
    03340
    03341           waiting = min(waiting, MAX_WAITING_CARGO);
    03342           waiting_changed = true;
    03343         }
    03344
    03345         /* We can't truncate cargo that's already reserved for loading.
    03346          * Thus StoredCount() here. */
    03347         if (waiting_changed && waiting < ge->cargo.AvailableCount()) {
    03348           /* Feed back the exact own waiting cargo at this station for the
    03349            * next rating calculation. */
    03350           ge->max_waiting_cargo = 0;
    03351
    03352           /* If truncating also punish the source stations' ratings to
    03353            * decrease the flow of incoming cargo. */
    03354
    03355           StationCargoAmountMap waiting_per_source;
    03356           ge->cargo.Truncate(ge->cargo.AvailableCount() - waiting, &waiting_per_source);
    03357           for (StationCargoAmountMap::iterator i(waiting_per_source.begin()); i != waiting_per_source.end(); ++i) {
    03358             Station *source_station = Station::GetIfValid(i->first);
    03359             if (source_station == NULL) continue;
    03360
    03361             GoodsEntry &source_ge = source_station->goods[cs->Index()];
    03362             source_ge.max_waiting_cargo = max(source_ge.max_waiting_cargo, i->second);
    03363           }
    03364         } else {
    03365           /* If the average number per next hop is low, be more forgiving. */
    03366           ge->max_waiting_cargo = waiting_avg;
    03367         }
    03368       }
    03369     }
    03370   }
    03371
    03372   StationID index = st->index;
    03373   if (waiting_changed) {
    03374     SetWindowDirty(WC_STATION_VIEW, index); // update whole window
    03375   } else {
    03376     SetWindowWidgetDirty(WC_STATION_VIEW, index, WID_SV_ACCEPT_RATING_LIST); // update only ratings list
    03377   }
    03378 }
    03379
    03388 void DeleteStaleLinks(Station *from)
    03389 {
    03390   for (CargoID c = 0; c < NUM_CARGO; ++c) {
    03391     GoodsEntry &ge = from->goods[c];
    03392     LinkGraph *lg = LinkGraph::GetIfValid(ge.link_graph);
    03393     if (lg == NULL) continue;
    03394     Node node = (*lg)[ge.node];
    03395     for (EdgeIterator it(node.Begin()); it != node.End();) {
    03396       Edge edge = it->second;
    03397       Station *to = Station::Get((*lg)[it->first].Station());
    03398       assert(to->goods[c].node == it->first);
    03399       ++it; // Do that before removing the node. Anything else may crash.
    03400       assert(_date >= edge.LastUpdate());
    03401       if ((uint)(_date - edge.LastUpdate()) > LinkGraph::MIN_TIMEOUT_DISTANCE +
    03402           (DistanceManhattan(from->xy, to->xy) >> 2)) {
    03403         node.RemoveEdge(to->goods[c].node);
    03404         ge.flows.DeleteFlows(to->index);
    03405         ge.cargo.Reroute(UINT_MAX, &ge.cargo, to->index, from->index, &ge);
    03406       }
    03407     }
    03408     assert(_date >= lg->LastCompression());
    03409     if ((uint)(_date - lg->LastCompression()) > LinkGraph::COMPRESSION_INTERVAL) {
    03410       lg->Compress();
    03411     }
    03412   }
    03413 }
    03414
    03423 void IncreaseStats(Station *st, CargoID cargo, StationID next_station_id, uint capacity, uint usage)
    03424 {
    03425   GoodsEntry &ge1 = st->goods[cargo];
    03426   Station *st2 = Station::Get(next_station_id);
    03427   GoodsEntry &ge2 = st2->goods[cargo];
    03428   LinkGraph *lg = NULL;
    03429   if (ge1.link_graph == INVALID_LINK_GRAPH) {
    03430     if (ge2.link_graph == INVALID_LINK_GRAPH) {
    03431       if (LinkGraph::CanAllocateItem()) {
    03432         lg = new LinkGraph(cargo);
    03433         LinkGraphSchedule::Instance()->Queue(lg);
    03434         ge2.link_graph = lg->index;
    03435         ge2.node = lg->AddNode(st2);
    03436       } else {
    03437         DEBUG(misc, 0, "Can't allocate link graph");
    03438       }
    03439     } else {
    03440       lg = LinkGraph::Get(ge2.link_graph);
    03441     }
    03442     if (lg) {
    03443       ge1.link_graph = lg->index;
    03444       ge1.node = lg->AddNode(st);
    03445     }
    03446   } else if (ge2.link_graph == INVALID_LINK_GRAPH) {
    03447     lg = LinkGraph::Get(ge1.link_graph);
    03448     ge2.link_graph = lg->index;
    03449     ge2.node = lg->AddNode(st2);
    03450   } else {
    03451     lg = LinkGraph::Get(ge1.link_graph);
    03452     if (ge1.link_graph != ge2.link_graph) {
    03453       LinkGraph *lg2 = LinkGraph::Get(ge2.link_graph);
    03454       if (lg->Size() < lg2->Size()) {
    03455         LinkGraphSchedule::Instance()->Unqueue(lg);
    03456         lg2->Merge(lg); // Updates GoodsEntries of lg
    03457         lg = lg2;
    03458       } else {
    03459         LinkGraphSchedule::Instance()->Unqueue(lg2);
    03460         lg->Merge(lg2); // Updates GoodsEntries of lg2
    03461       }
    03462     }
    03463   }
    03464   if (lg != NULL) {
    03465     (*lg)[ge1.node].UpdateEdge(ge2.node, capacity, usage);
    03466   }
    03467 }
    03468
    03475 void IncreaseStats(Station *st, const Vehicle *front, StationID next_station_id)
    03476 {
    03477   for (const Vehicle *v = front; v != NULL; v = v->Next()) {
    03478     if (v->refit_cap > 0) {
    03479       /* The cargo count can indeed be higher than the refit_cap if
    03480        * wagons have been auto-replaced and subsequently auto-
    03481        * refitted to a higher capacity. The cargo gets redistributed
    03482        * among the wagons in that case.
    03483        * As usage is not such an important figure anyway we just
    03484        * ignore the additional cargo then.*/
    03485       IncreaseStats(st, v->cargo_type, next_station_id, v->refit_cap,
    03486         min(v->refit_cap, v->cargo.StoredCount()));
    03487     }
    03488   }
    03489 }
    03490
    03491 /* called for every station each tick */
    03492 static void StationHandleSmallTick(BaseStation *st)
    03493 {
    03494   if ((st->facilities & FACIL_WAYPOINT) != 0 || !st->IsInUse()) return;
    03495
    03496   byte b = st->delete_ctr + 1;
    03497   if (b >= STATION_RATING_TICKS) b = 0;
    03498   st->delete_ctr = b;
    03499
    03500   if (b == 0) UpdateStationRating(Station::From(st));
    03501 }
    03502
    03503 void OnTick_Station()
    03504 {
    03505   if (_game_mode == GM_EDITOR) return;
    03506
    03507   BaseStation *st;
    03508   FOR_ALL_BASE_STATIONS(st) {
    03509     StationHandleSmallTick(st);
    03510
    03511     /* Clean up the link graph about once a week. */
    03512     if (Station::IsExpected(st) && (_tick_counter + st->index) % STATION_LINKGRAPH_TICKS == 0) {
    03513       DeleteStaleLinks(Station::From(st));
    03514     };
    03515
    03516     /* Run STATION_ACCEPTANCE_TICKS = 250 tick interval trigger for station animation.
    03517      * Station index is included so that triggers are not all done
    03518      * at the same time. */
    03519     if ((_tick_counter + st->index) % STATION_ACCEPTANCE_TICKS == 0) {
    03520       /* Stop processing this station if it was deleted */
    03521       if (!StationHandleBigTick(st)) continue;
    03522       TriggerStationAnimation(st, st->xy, SAT_250_TICKS);
    03523       if (Station::IsExpected(st)) AirportAnimationTrigger(Station::From(st), AAT_STATION_250_TICKS);
    03524     }
    03525   }
    03526 }
    03527
    03529 void StationMonthlyLoop()
    03530 {
    03531   Station *st;
    03532
    03533   FOR_ALL_STATIONS(st) {
    03534     for (CargoID i = 0; i < NUM_CARGO; i++) {
    03535       GoodsEntry *ge = &st->goods[i];
    03536       SB(ge->acceptance_pickup, GoodsEntry::GES_LAST_MONTH, 1, GB(ge->acceptance_pickup, GoodsEntry::GES_CURRENT_MONTH, 1));
    03537       ClrBit(ge->acceptance_pickup, GoodsEntry::GES_CURRENT_MONTH);
    03538     }
    03539   }
    03540 }
    03541
    03542
    03543 void ModifyStationRatingAround(TileIndex tile, Owner owner, int amount, uint radius)
    03544 {
    03545   Station *st;
    03546
    03547   FOR_ALL_STATIONS(st) {
    03548     if (st->owner == owner &&
    03549         DistanceManhattan(tile, st->xy) <= radius) {
    03550       for (CargoID i = 0; i < NUM_CARGO; i++) {
    03551         GoodsEntry *ge = &st->goods[i];
    03552
    03553         if (ge->acceptance_pickup != 0) {
    03554           ge->rating = Clamp(ge->rating + amount, 0, 255);
    03555         }
    03556       }
    03557     }
    03558   }
    03559 }
    03560
    03561 static uint UpdateStationWaiting(Station *st, CargoID type, uint amount, SourceType source_type, SourceID source_id)
    03562 {
    03563   /* We can't allocate a CargoPacket? Then don't do anything
    03564    * at all; i.e. just discard the incoming cargo. */
    03565   if (!CargoPacket::CanAllocateItem()) return 0;
    03566
    03567   GoodsEntry &ge = st->goods[type];
    03568   amount += ge.amount_fract;
    03569   ge.amount_fract = GB(amount, 0, 8);
    03570
    03571   amount >>= 8;
    03572   /* No new "real" cargo item yet. */
    03573   if (amount == 0) return 0;
    03574
    03575   StationID next = ge.GetVia(st->index);
    03576   ge.cargo.Append(new CargoPacket(st->index, st->xy, amount, source_type, source_id), next);
    03577   LinkGraph *lg = NULL;
    03578   if (ge.link_graph == INVALID_LINK_GRAPH) {
    03579     if (LinkGraph::CanAllocateItem()) {
    03580       lg = new LinkGraph(type);
    03581       LinkGraphSchedule::Instance()->Queue(lg);
    03582       ge.link_graph = lg->index;
    03583       ge.node = lg->AddNode(st);
    03584     } else {
    03585       DEBUG(misc, 0, "Can't allocate link graph");
    03586     }
    03587   } else {
    03588     lg = LinkGraph::Get(ge.link_graph);
    03589   }
    03590   if (lg != NULL) (*lg)[ge.node].UpdateSupply(amount);
    03591
    03592   if (!ge.HasRating()) {
    03593     InvalidateWindowData(WC_STATION_LIST, st->index);
    03594     SetBit(ge.acceptance_pickup, GoodsEntry::GES_PICKUP);
    03595   }
    03596
    03597   TriggerStationRandomisation(st, st->xy, SRT_NEW_CARGO, type);
    03598   TriggerStationAnimation(st, st->xy, SAT_NEW_CARGO, type);
    03599   AirportAnimationTrigger(st, AAT_STATION_NEW_CARGO, type);
    03600
    03601   SetWindowDirty(WC_STATION_VIEW, st->index);
    03602   st->MarkTilesDirty(true);
    03603   return amount;
    03604 }
    03605
    03606 static bool IsUniqueStationName(const char *name)
    03607 {
    03608   const Station *st;
    03609
    03610   FOR_ALL_STATIONS(st) {
    03611     if (st->name != NULL && strcmp(st->name, name) == 0) return false;
    03612   }
    03613
    03614   return true;
    03615 }
    03616
    03626 CommandCost CmdRenameStation(TileIndex tile, DoCommandFlag flags, uint32 p1, uint32 p2, const char *text)
    03627 {
    03628   Station *st = Station::GetIfValid(p1);
    03629   if (st == NULL) return CMD_ERROR;
    03630
    03631   CommandCost ret = CheckOwnership(st->owner);
    03632   if (ret.Failed()) return ret;
    03633
    03634   bool reset = StrEmpty(text);
    03635
    03636   if (!reset) {
    03637     if (Utf8StringLength(text) >= MAX_LENGTH_STATION_NAME_CHARS) return CMD_ERROR;
    03638     if (!IsUniqueStationName(text)) return_cmd_error(STR_ERROR_NAME_MUST_BE_UNIQUE);
    03639   }
    03640
    03641   if (flags & DC_EXEC) {
    03642     free(st->name);
    03643     st->name = reset ? NULL : strdup(text);
    03644
    03645     st->UpdateVirtCoord();
    03646     InvalidateWindowData(WC_STATION_LIST, st->owner, 1);
    03647   }
    03648
    03649   return CommandCost();
    03650 }
    03651
    03658 void FindStationsAroundTiles(const TileArea &location, StationList *stations)
    03659 {
    03660   /* area to search = producer plus station catchment radius */
    03661   uint max_rad = (_settings_game.station.modified_catchment ? MAX_CATCHMENT : CA_UNMODIFIED);
    03662
    03663   uint x = TileX(location.tile);
    03664   uint y = TileY(location.tile);
    03665
    03666   uint min_x = (x > max_rad) ? x - max_rad : 0;
    03667   uint max_x = x + location.w + max_rad;
    03668   uint min_y = (y > max_rad) ? y - max_rad : 0;
    03669   uint max_y = y + location.h + max_rad;
    03670
    03671   if (min_x == 0 && _settings_game.construction.freeform_edges) min_x = 1;
    03672   if (min_y == 0 && _settings_game.construction.freeform_edges) min_y = 1;
    03673   if (max_x >= MapSizeX()) max_x = MapSizeX() - 1;
    03674   if (max_y >= MapSizeY()) max_y = MapSizeY() - 1;
    03675
    03676   for (uint cy = min_y; cy < max_y; cy++) {
    03677     for (uint cx = min_x; cx < max_x; cx++) {
    03678       TileIndex cur_tile = TileXY(cx, cy);
    03679       if (!IsTileType(cur_tile, MP_STATION)) continue;
    03680
    03681       Station *st = Station::GetByTile(cur_tile);
    03682       /* st can be NULL in case of waypoints */
    03683       if (st == NULL) continue;
    03684
    03685       if (_settings_game.station.modified_catchment) {
    03686         int rad = st->GetCatchmentRadius();
    03687         int rad_x = cx - x;
    03688         int rad_y = cy - y;
    03689
    03690         if (rad_x < -rad || rad_x >= rad + location.w) continue;
    03691         if (rad_y < -rad || rad_y >= rad + location.h) continue;
    03692       }
    03693
    03694       /* Insert the station in the set. This will fail if it has
    03695        * already been added.
    03696        */
    03697       stations->Include(st);
    03698     }
    03699   }
    03700 }
    03701
    03706 const StationList *StationFinder::GetStations()
    03707 {
    03708   if (this->tile != INVALID_TILE) {
    03709     FindStationsAroundTiles(*this, &this->stations);
    03710     this->tile = INVALID_TILE;
    03711   }
    03712   return &this->stations;
    03713 }
    03714
    03715 uint MoveGoodsToStation(CargoID type, uint amount, SourceType source_type, SourceID source_id, const StationList *all_stations)
    03716 {
    03717   /* Return if nothing to do. Also the rounding below fails for 0. */
    03718   if (amount == 0) return 0;
    03719
    03720   Station *st1 = NULL;   // Station with best rating
    03721   Station *st2 = NULL;   // Second best station
    03722   uint best_rating1 = 0; // rating of st1
    03723   uint best_rating2 = 0; // rating of st2
    03724
    03725   for (Station * const *st_iter = all_stations->Begin(); st_iter != all_stations->End(); ++st_iter) {
    03726     Station *st = *st_iter;
    03727
    03728     /* Is the station reserved exclusively for somebody else? */
    03729     if (st->town->exclusive_counter > 0 && st->town->exclusivity != st->owner) continue;
    03730
    03731     if (st->goods[type].rating == 0) continue; // Lowest possible rating, better not to give cargo anymore
    03732
    03733     if (_settings_game.order.selectgoods && !st->goods[type].HasVehicleEverTriedLoading()) continue; // Selectively servicing stations, and not this one
    03734
    03735     if (IsCargoInClass(type, CC_PASSENGERS)) {
    03736       if (st->facilities == FACIL_TRUCK_STOP) continue; // passengers are never served by just a truck stop
    03737     } else {
    03738       if (st->facilities == FACIL_BUS_STOP) continue; // non-passengers are never served by just a bus stop
    03739     }
    03740
    03741     /* This station can be used, add it to st1/st2 */
    03742     if (st1 == NULL || st->goods[type].rating >= best_rating1) {
    03743       st2 = st1; best_rating2 = best_rating1; st1 = st; best_rating1 = st->goods[type].rating;
    03744     } else if (st2 == NULL || st->goods[type].rating >= best_rating2) {
    03745       st2 = st; best_rating2 = st->goods[type].rating;
    03746     }
    03747   }
    03748
    03749   /* no stations around at all? */
    03750   if (st1 == NULL) return 0;
    03751
    03752   /* From now we'll calculate with fractal cargo amounts.
    03753    * First determine how much cargo we really have. */
    03754   amount *= best_rating1 + 1;
    03755
    03756   if (st2 == NULL) {
    03757     /* only one station around */
    03758     return UpdateStationWaiting(st1, type, amount, source_type, source_id);
    03759   }
    03760
    03761   /* several stations around, the best two (highest rating) are in st1 and st2 */
    03762   assert(st1 != NULL);
    03763   assert(st2 != NULL);
    03764   assert(best_rating1 != 0 || best_rating2 != 0);
    03765
    03766   /* Then determine the amount the worst station gets. We do it this way as the
    03767    * best should get a bonus, which in this case is the rounding difference from
    03768    * this calculation. In reality that will mean the bonus will be pretty low.
    03769    * Nevertheless, the best station should always get the most cargo regardless
    03770    * of rounding issues. */
    03771   uint worst_cargo = amount * best_rating2 / (best_rating1 + best_rating2);
    03772   assert(worst_cargo <= (amount - worst_cargo));
    03773
    03774   /* And then send the cargo to the stations! */
    03775   uint moved = UpdateStationWaiting(st1, type, amount - worst_cargo, source_type, source_id);
    03776   /* These two UpdateStationWaiting's can't be in the statement as then the order
    03777    * of execution would be undefined and that could cause desyncs with callbacks. */
    03778   return moved + UpdateStationWaiting(st2, type, worst_cargo, source_type, source_id);
    03779 }
    03780
    03781 void BuildOilRig(TileIndex tile)
    03782 {
    03783   if (!Station::CanAllocateItem()) {
    03784     DEBUG(misc, 0, "Can't allocate station for oilrig at 0x%X, reverting to oilrig only", tile);
    03785     return;
    03786   }
    03787
    03788   Station *st = new Station(tile);
    03789   st->town = ClosestTownFromTile(tile, UINT_MAX);
    03790
    03791   st->string_id = GenerateStationName(st, tile, STATIONNAMING_OILRIG);
    03792
    03793   assert(IsTileType(tile, MP_INDUSTRY));
    03794   DeleteAnimatedTile(tile);
    03795   MakeOilrig(tile, st->index, GetWaterClass(tile));
    03796
    03797   st->owner = OWNER_NONE;
    03798   st->airport.type = AT_OILRIG;
    03799   st->airport.Add(tile);
    03800   st->dock_tile = tile;
    03801   st->facilities = FACIL_AIRPORT | FACIL_DOCK;
    03802   st->build_date = _date;
    03803
    03804   st->rect.BeforeAddTile(tile, StationRect::ADD_FORCE);
    03805
    03806   st->UpdateVirtCoord();
    03807   UpdateStationAcceptance(st, false);
    03808   st->RecomputeIndustriesNear();
    03809 }
    03810
    03811 void DeleteOilRig(TileIndex tile)
    03812 {
    03813   Station *st = Station::GetByTile(tile);
    03814
    03815   MakeWaterKeepingClass(tile, OWNER_NONE);
    03816
    03817   st->dock_tile = INVALID_TILE;
    03818   st->airport.Clear();
    03819   st->facilities &= ~(FACIL_AIRPORT | FACIL_DOCK);
    03820   st->airport.flags = 0;
    03821
    03822   st->rect.AfterRemoveTile(st, tile);
    03823
    03824   st->UpdateVirtCoord();
    03825   st->RecomputeIndustriesNear();
    03826   if (!st->IsInUse()) delete st;
    03827 }
    03828
    03829 static void ChangeTileOwner_Station(TileIndex tile, Owner old_owner, Owner new_owner)
    03830 {
    03831   if (IsRoadStopTile(tile)) {
    03832     for (RoadType rt = ROADTYPE_ROAD; rt < ROADTYPE_END; rt++) {
    03833       /* Update all roadtypes, no matter if they are present */
    03834       if (GetRoadOwner(tile, rt) == old_owner) {
    03835         if (HasTileRoadType(tile, rt)) {
    03836           /* A drive-through road-stop has always two road bits. No need to dirty windows here, we'll redraw the whole screen anyway. */
    03837           Company::Get(old_owner)->infrastructure.road[rt] -= 2;
    03838           if (new_owner != INVALID_OWNER) Company::Get(new_owner)->infrastructure.road[rt] += 2;
    03839         }
    03840         SetRoadOwner(tile, rt, new_owner == INVALID_OWNER ? OWNER_NONE : new_owner);
    03841       }
    03842     }
    03843   }
    03844
    03845   if (!IsTileOwner(tile, old_owner)) return;
    03846
    03847   if (new_owner != INVALID_OWNER) {
    03848     /* Update company infrastructure counts. Only do it here
    03849      * if the new owner is valid as otherwise the clear
    03850      * command will do it for us. No need to dirty windows
    03851      * here, we'll redraw the whole screen anyway.*/
    03852     Company *old_company = Company::Get(old_owner);
    03853     Company *new_company = Company::Get(new_owner);
    03854
    03855     /* Update counts for underlying infrastructure. */
    03856     switch (GetStationType(tile)) {
    03857       case STATION_RAIL:
    03858       case STATION_WAYPOINT:
    03859         if (!IsStationTileBlocked(tile)) {
    03860           old_company->infrastructure.rail[GetRailType(tile)]--;
    03861           new_company->infrastructure.rail[GetRailType(tile)]++;
    03862         }
    03863         break;
    03864
    03865       case STATION_BUS:
    03866       case STATION_TRUCK:
    03867         /* Road stops were already handled above. */
    03868         break;
    03869
    03870       case STATION_BUOY:
    03871       case STATION_DOCK:
    03872         if (GetWaterClass(tile) == WATER_CLASS_CANAL) {
    03873           old_company->infrastructure.water--;
    03874           new_company->infrastructure.water++;
    03875         }
    03876         break;
    03877
    03878       default:
    03879         break;
    03880     }
    03881
    03882     /* Update station tile count. */
    03883     if (!IsBuoy(tile) && !IsAirport(tile)) {
    03884       old_company->infrastructure.station--;
    03885       new_company->infrastructure.station++;
    03886     }
    03887
    03888     /* for buoys, owner of tile is owner of water, st->owner == OWNER_NONE */
    03889     SetTileOwner(tile, new_owner);
    03890     InvalidateWindowClassesData(WC_STATION_LIST, 0);
    03891   } else {
    03892     if (IsDriveThroughStopTile(tile)) {
    03893       /* Remove the drive-through road stop */
    03894       DoCommand(tile, 1 | 1 << 8, (GetStationType(tile) == STATION_TRUCK) ? ROADSTOP_TRUCK : ROADSTOP_BUS, DC_EXEC | DC_BANKRUPT, CMD_REMOVE_ROAD_STOP);
    03895       assert(IsTileType(tile, MP_ROAD));
    03896       /* Change owner of tile and all roadtypes */
    03897       ChangeTileOwner(tile, old_owner, new_owner);
    03898     } else {
    03899       DoCommand(tile, 0, 0, DC_EXEC | DC_BANKRUPT, CMD_LANDSCAPE_CLEAR);
    03900       /* Set tile owner of water under (now removed) buoy and dock to OWNER_NONE.
    03901        * Update owner of buoy if it was not removed (was in orders).
    03902        * Do not update when owned by OWNER_WATER (sea and rivers). */
    03903       if ((IsTileType(tile, MP_WATER) || IsBuoyTile(tile)) && IsTileOwner(tile, old_owner)) SetTileOwner(tile, OWNER_NONE);
    03904     }
    03905   }
    03906 }
    03907
    03916 static bool CanRemoveRoadWithStop(TileIndex tile, DoCommandFlag flags)
    03917 {
    03918   /* Yeah... water can always remove stops, right? */
    03919   if (_current_company == OWNER_WATER) return true;
    03920
    03921   RoadTypes rts = GetRoadTypes(tile);
    03922   if (HasBit(rts, ROADTYPE_TRAM)) {
    03923     Owner tram_owner = GetRoadOwner(tile, ROADTYPE_TRAM);
    03924     if (tram_owner != OWNER_NONE && CheckOwnership(tram_owner).Failed()) return false;
    03925   }
    03926   if (HasBit(rts, ROADTYPE_ROAD)) {
    03927     Owner road_owner = GetRoadOwner(tile, ROADTYPE_ROAD);
    03928     if (road_owner != OWNER_TOWN) {
    03929       if (road_owner != OWNER_NONE && CheckOwnership(road_owner).Failed()) return false;
    03930     } else {
    03931       if (CheckAllowRemoveRoad(tile, GetAnyRoadBits(tile, ROADTYPE_ROAD), OWNER_TOWN, ROADTYPE_ROAD, flags).Failed()) return false;
    03932     }
    03933   }
    03934
    03935   return true;
    03936 }
    03937
    03944 CommandCost ClearTile_Station(TileIndex tile, DoCommandFlag flags)
    03945 {
    03946   if (flags & DC_AUTO) {
    03947     switch (GetStationType(tile)) {
    03948       default: break;
    03949       case STATION_RAIL:     return_cmd_error(STR_ERROR_MUST_DEMOLISH_RAILROAD);
    03950       case STATION_WAYPOINT: return_cmd_error(STR_ERROR_BUILDING_MUST_BE_DEMOLISHED);
    03951       case STATION_AIRPORT:  return_cmd_error(STR_ERROR_MUST_DEMOLISH_AIRPORT_FIRST);
    03952       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);
    03953       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);
    03954       case STATION_BUOY:     return_cmd_error(STR_ERROR_BUOY_IN_THE_WAY);
    03955       case STATION_DOCK:     return_cmd_error(STR_ERROR_MUST_DEMOLISH_DOCK_FIRST);
    03956       case STATION_OILRIG:
    03957         SetDParam(1, STR_INDUSTRY_NAME_OIL_RIG);
    03958         return_cmd_error(STR_ERROR_GENERIC_OBJECT_IN_THE_WAY);
    03959     }
    03960   }
    03961
    03962   switch (GetStationType(tile)) {
    03963     case STATION_RAIL:     return RemoveRailStation(tile, flags);
    03964     case STATION_WAYPOINT: return RemoveRailWaypoint(tile, flags);
    03965     case STATION_AIRPORT:  return RemoveAirport(tile, flags);
    03966     case STATION_TRUCK:
    03967       if (IsDriveThroughStopTile(tile) && !CanRemoveRoadWithStop(tile, flags)) {
    03968         return_cmd_error(STR_ERROR_MUST_DEMOLISH_TRUCK_STATION_FIRST);
    03969       }
    03970       return RemoveRoadStop(tile, flags);
    03971     case STATION_BUS:
    03972       if (IsDriveThroughStopTile(tile) && !CanRemoveRoadWithStop(tile, flags)) {
    03973         return_cmd_error(STR_ERROR_MUST_DEMOLISH_BUS_STATION_FIRST);
    03974       }
    03975       return RemoveRoadStop(tile, flags);
    03976     case STATION_BUOY:     return RemoveBuoy(tile, flags);
    03977     case STATION_DOCK:     return RemoveDock(tile, flags);
    03978     default: break;
    03979   }
    03980
    03981   return CMD_ERROR;
    03982 }
    03983
    03984 static CommandCost TerraformTile_Station(TileIndex tile, DoCommandFlag flags, int z_new, Slope tileh_new)
    03985 {
    03986   if (_settings_game.construction.build_on_slopes && AutoslopeEnabled()) {
    03987     /* TODO: If you implement newgrf callback 149 'land slope check', you have to decide what to do with it here.
    03988      *       TTDP does not call it.
    03989      */
    03990     if (GetTileMaxZ(tile) == z_new + GetSlopeMaxZ(tileh_new)) {
    03991       switch (GetStationType(tile)) {
    03992         case STATION_WAYPOINT:
    03993         case STATION_RAIL: {
    03994           DiagDirection direction = AxisToDiagDir(GetRailStationAxis(tile));
    03995           if (!AutoslopeCheckForEntranceEdge(tile, z_new, tileh_new, direction)) break;
    03996           if (!AutoslopeCheckForEntranceEdge(tile, z_new, tileh_new, ReverseDiagDir(direction))) break;
    03997           return CommandCost(EXPENSES_CONSTRUCTION, _price[PR_BUILD_FOUNDATION]);
    03998         }
    03999
    04000         case STATION_AIRPORT:
    04001           return CommandCost(EXPENSES_CONSTRUCTION, _price[PR_BUILD_FOUNDATION]);
    04002
    04003         case STATION_TRUCK:
    04004         case STATION_BUS: {
    04005           DiagDirection direction = GetRoadStopDir(tile);
    04006           if (!AutoslopeCheckForEntranceEdge(tile, z_new, tileh_new, direction)) break;
    04007           if (IsDriveThroughStopTile(tile)) {
    04008             if (!AutoslopeCheckForEntranceEdge(tile, z_new, tileh_new, ReverseDiagDir(direction))) break;
    04009           }
    04010           return CommandCost(EXPENSES_CONSTRUCTION, _price[PR_BUILD_FOUNDATION]);
    04011         }
    04012
    04013         default: break;
    04014       }
    04015     }
    04016   }
    04017   return DoCommand(tile, 0, 0, flags, CMD_LANDSCAPE_CLEAR);
    04018 }
    04019
    04025 uint FlowStat::GetShare(StationID st) const
    04026 {
    04027   uint32 prev = 0;
    04028   for (SharesMap::const_iterator it = this->shares.begin(); it != this->shares.end(); ++it) {
    04029     if (it->second == st) {
    04030       return it->first - prev;
    04031     } else {
    04032       prev = it->first;
    04033     }
    04034   }
    04035   return 0;
    04036 }
    04037
    04043 StationID FlowStat::GetVia(StationID excluded, StationID excluded2) const
    04044 {
    04045   assert(!this->shares.empty());
    04046   uint max = (--this->shares.end())->first - 1;
    04047   SharesMap::const_iterator it = this->shares.upper_bound(RandomRange(max));
    04048   assert(it != this->shares.end());
    04049   if (it->second != excluded && it->second != excluded2) return it->second;
    04050
    04051   /* We've hit one of the excluded stations.
    04052    * Draw another share, from outside its range. */
    04053
    04054   uint end = it->first;
    04055   uint begin = (it == this->shares.begin() ? 0 : (--it)->first);
    04056   uint interval = end - begin;
    04057   if (interval > max) return INVALID_STATION; // Only one station in the map.
    04058   uint new_max = max - interval;
    04059   uint rand = RandomRange(new_max);
    04060   SharesMap::const_iterator it2 = (rand < begin) ? this->shares.upper_bound(rand) :
    04061       this->shares.upper_bound(rand + interval);
    04062   if (it2->second != excluded && it2->second != excluded2) return it2->second;
    04063
    04064   /* We've hit the second excluded station.
    04065    * Same as before, only a bit more complicated. */
    04066
    04067   uint end2 = it2->first;
    04068   uint begin2 = (it2 == this->shares.begin() ? 0 : (--it2)->first);
    04069   uint interval2 = end2 - begin2;
    04070   if (interval2 > new_max) return INVALID_STATION; // Only the two excluded stations in the map.
    04071   new_max -= interval2;
    04072   if (begin > begin2) {
    04073     Swap(begin, begin2);
    04074     Swap(end, end2);
    04075     Swap(interval, interval2);
    04076   }
    04077   rand = RandomRange(new_max);
    04078   if (rand < begin) {
    04079     return this->shares.upper_bound(rand)->second;
    04080   } else if (rand < begin2 - interval) {
    04081     return this->shares.upper_bound(rand + interval)->second;
    04082   } else {
    04083     return this->shares.upper_bound(rand + interval + interval2)->second;
    04084   }
    04085
    04086 }
    04087
    04094 void FlowStat::ChangeShare(StationID st, int flow)
    04095 {
    04096   /* We assert only before changing as afterwards the shares can actually
    04097    * be empty. In that case the whole flow stat must be deleted then. */
    04098   assert(!this->shares.empty());
    04099
    04100   int32 added_shares = 0;
    04101   uint32 last_share = 0;
    04102   SharesMap new_shares;
    04103   for (SharesMap::iterator it(this->shares.begin()); it != this->shares.end(); ++it) {
    04104     if (it->second == st) {
    04105       uint share = it->first - last_share;
    04106       int change = flow - added_shares;
    04107       uint new_share = (change < 0 && (uint)(-change) > share) ? 0 : share + change;
    04108       added_shares -= share;
    04109       added_shares += new_share;
    04110       if (new_share > 0) {
    04111         new_shares[it->first + added_shares] = it->second;
    04112       }
    04113     } else {
    04114       new_shares[it->first + added_shares] = it->second;
    04115     }
    04116     last_share = it->first;
    04117   }
    04118   if (flow > added_shares) {
    04119     new_shares[last_share + flow - added_shares] = st;
    04120   }
    04121   this->shares.swap(new_shares);
    04122 }
    04123
    04129 void FlowStat::Cleanup(NodeID self, LinkGraphID link_graph)
    04130 {
    04131   const LinkGraph *lg = LinkGraph::Get(link_graph);
    04132   for (SharesMap::iterator it(this->shares.begin()); it != this->shares.end();) {
    04133     const GoodsEntry &ge = Station::Get(it->second)->goods[lg->Cargo()];
    04134     if (ge.link_graph != link_graph ||
    04135         (ge.node != self && (*lg)[self][ge.node].LastUpdate() == INVALID_DATE)) {
    04136       this->shares.erase(it++);
    04137     } else {
    04138       ++it;
    04139     }
    04140   }
    04141 }
    04142
    04149 void FlowStatMap::AddFlow(StationID origin, StationID via, uint flow)
    04150 {
    04151   FlowStatMap::iterator origin_it = this->find(origin);
    04152   if (origin_it == this->end()) {
    04153     this->insert(std::make_pair(origin, FlowStat(via, flow)));
    04154   } else {
    04155     origin_it->second.ChangeShare(via, flow);
    04156     assert(!origin_it->second.GetShares()->empty());
    04157   }
    04158 }
    04159
    04168 void FlowStatMap::PassOnFlow(StationID origin, StationID via, uint flow)
    04169 {
    04170   FlowStatMap::iterator prev_it = this->find(origin);
    04171   if (prev_it == this->end()) {
    04172     FlowStat fs(via, flow);
    04173     fs.AppendShare(INVALID_STATION, flow);
    04174     this->insert(std::make_pair(origin, fs));
    04175   } else {
    04176     prev_it->second.ChangeShare(via, flow);
    04177     prev_it->second.ChangeShare(INVALID_STATION, flow);
    04178     assert(!prev_it->second.GetShares()->empty());
    04179   }
    04180 }
    04181
    04186 void FlowStatMap::FinalizeLocalConsumption(StationID self)
    04187 {
    04188   for (FlowStatMap::iterator i = this->begin(); i != this->end(); ++i) {
    04189     FlowStat &fs = i->second;
    04190     uint local = fs.GetShare(INVALID_STATION);
    04191     fs.ChangeShare(self, -local);
    04192     fs.ChangeShare(INVALID_STATION, -local);
    04193
    04194     /* If the local share is used up there must be a share for some
    04195      * remote station. */
    04196     assert(!fs.GetShares()->empty());
    04197   }
    04198 }
    04199
    04205 void FlowStatMap::Cleanup(NodeID self, LinkGraphID link_graph)
    04206 {
    04207   for (FlowStatMap::iterator i = this->begin(); i != this->end();) {
    04208     i->second.Cleanup(self, link_graph);
    04209     if (i->second.GetShares()->empty()) {
    04210       this->erase(i++);
    04211     } else {
    04212       ++i;
    04213     }
    04214   }
    04215 }
    04216
    04221 void FlowStatMap::DeleteFlows(StationID via)
    04222 {
    04223   for (FlowStatMap::iterator f_it = this->begin(); f_it != this->end();) {
    04224     FlowStat &s_flows = f_it->second;
    04225     s_flows.ChangeShare(via, INT_MIN);
    04226     if (s_flows.GetShares()->empty()) {
    04227       this->erase(f_it++);
    04228     } else {
    04229       ++f_it;
    04230     }
    04231   }
    04232 }
    04233
    04239 uint GoodsEntry::GetSumFlowVia(StationID via) const
    04240 {
    04241   uint ret = 0;
    04242   for (FlowStatMap::const_iterator i = this->flows.begin(); i != this->flows.end(); ++i) {
    04243     ret += i->second.GetShare(via);
    04244   }
    04245   return ret;
    04246 }
    04247
    04248 extern const TileTypeProcs _tile_type_station_procs = {
    04249   DrawTile_Station,           // draw_tile_proc
    04250   GetSlopePixelZ_Station,     // get_slope_z_proc
    04251   ClearTile_Station,          // clear_tile_proc
    04252   NULL,                       // add_accepted_cargo_proc
    04253   GetTileDesc_Station,        // get_tile_desc_proc
    04254   GetTileTrackStatus_Station, // get_tile_track_status_proc
    04255   ClickTile_Station,          // click_tile_proc
    04256   AnimateTile_Station,        // animate_tile_proc
    04257   TileLoop_Station,           // tile_loop_proc
    04258   ChangeTileOwner_Station,    // change_tile_owner_proc
    04259   NULL,                       // add_produced_cargo_proc
    04260   VehicleEnter_Station,       // vehicle_enter_tile_proc
    04261   GetFoundation_Station,      // get_foundation_proc
    04262   TerraformTile_Station,      // terraform_tile_proc
    04263 };