station_cmd.cpp

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00001 /* $Id: station_cmd.cpp 16481 2009-05-31 12:18:03Z rubidium $ */
00002 
00005 #include "stdafx.h"
00006 #include "openttd.h"
00007 #include "aircraft.h"
00008 #include "bridge_map.h"
00009 #include "cmd_helper.h"
00010 #include "landscape.h"
00011 #include "viewport_func.h"
00012 #include "command_func.h"
00013 #include "town.h"
00014 #include "news_func.h"
00015 #include "train.h"
00016 #include "roadveh.h"
00017 #include "industry_map.h"
00018 #include "newgrf_station.h"
00019 #include "newgrf_commons.h"
00020 #include "yapf/yapf.h"
00021 #include "road_internal.h" /* For drawing catenary/checking road removal */
00022 #include "variables.h"
00023 #include "autoslope.h"
00024 #include "water.h"
00025 #include "station_gui.h"
00026 #include "strings_func.h"
00027 #include "functions.h"
00028 #include "window_func.h"
00029 #include "date_func.h"
00030 #include "vehicle_func.h"
00031 #include "string_func.h"
00032 #include "oldpool_func.h"
00033 #include "animated_tile_func.h"
00034 #include "elrail_func.h"
00035 
00036 #include "table/strings.h"
00037 
00038 DEFINE_OLD_POOL_GENERIC(Station, Station)
00039 DEFINE_OLD_POOL_GENERIC(RoadStop, RoadStop)
00040 
00041 
00048 bool IsHangar(TileIndex t)
00049 {
00050   assert(IsTileType(t, MP_STATION));
00051 
00052   const Station *st = GetStationByTile(t);
00053   const AirportFTAClass *apc = st->Airport();
00054 
00055   for (uint i = 0; i < apc->nof_depots; i++) {
00056     if (st->airport_tile + ToTileIndexDiff(apc->airport_depots[i]) == t) return true;
00057   }
00058 
00059   return false;
00060 }
00061 
00062 RoadStop *GetRoadStopByTile(TileIndex tile, RoadStopType type)
00063 {
00064   const Station *st = GetStationByTile(tile);
00065 
00066   for (RoadStop *rs = st->GetPrimaryRoadStop(type);; rs = rs->next) {
00067     if (rs->xy == tile) return rs;
00068     assert(rs->next != NULL);
00069   }
00070 }
00071 
00072 
00073 static uint GetNumRoadStopsInStation(const Station *st, RoadStopType type)
00074 {
00075   uint num = 0;
00076 
00077   assert(st != NULL);
00078   for (const RoadStop *rs = st->GetPrimaryRoadStop(type); rs != NULL; rs = rs->next) {
00079     num++;
00080   }
00081 
00082   return num;
00083 }
00084 
00085 
00086 #define CHECK_STATIONS_ERR ((Station*)-1)
00087 
00088 static Station *GetStationAround(TileIndex tile, int w, int h, StationID closest_station)
00089 {
00090   /* check around to see if there's any stations there */
00091   BEGIN_TILE_LOOP(tile_cur, w + 2, h + 2, tile - TileDiffXY(1, 1))
00092     if (IsTileType(tile_cur, MP_STATION)) {
00093       StationID t = GetStationIndex(tile_cur);
00094 
00095       if (closest_station == INVALID_STATION) {
00096         closest_station = t;
00097       } else if (closest_station != t) {
00098         _error_message = STR_3006_ADJOINS_MORE_THAN_ONE_EXISTING;
00099         return CHECK_STATIONS_ERR;
00100       }
00101     }
00102   END_TILE_LOOP(tile_cur, w + 2, h + 2, tile - TileDiffXY(1, 1))
00103   return (closest_station == INVALID_STATION) ? NULL : GetStation(closest_station);
00104 }
00105 
00111 typedef bool (*CMSAMatcher)(TileIndex tile);
00112 
00121 static int CountMapSquareAround(TileIndex tile, CMSAMatcher cmp)
00122 {
00123   int num = 0;
00124 
00125   for (int dx = -3; dx <= 3; dx++) {
00126     for (int dy = -3; dy <= 3; dy++) {
00127       TileIndex t = TileAddWrap(tile, dx, dy);
00128       if (t != INVALID_TILE && cmp(t)) num++;
00129     }
00130   }
00131 
00132   return num;
00133 }
00134 
00140 static bool CMSAMine(TileIndex tile)
00141 {
00142   /* No industry */
00143   if (!IsTileType(tile, MP_INDUSTRY)) return false;
00144 
00145   const Industry *ind = GetIndustryByTile(tile);
00146 
00147   /* No extractive industry */
00148   if ((GetIndustrySpec(ind->type)->life_type & INDUSTRYLIFE_EXTRACTIVE) == 0) return false;
00149 
00150   for (uint i = 0; i < lengthof(ind->produced_cargo); i++) {
00151     /* The industry extracts something non-liquid, i.e. no oil or plastic, so it is a mine.
00152      * Also the production of passengers and mail is ignored. */
00153     if (ind->produced_cargo[i] != CT_INVALID &&
00154         (GetCargo(ind->produced_cargo[i])->classes & (CC_LIQUID | CC_PASSENGERS | CC_MAIL)) == 0) {
00155       return true;
00156     }
00157   }
00158 
00159   return false;
00160 }
00161 
00167 static bool CMSAWater(TileIndex tile)
00168 {
00169   return IsTileType(tile, MP_WATER) && IsWater(tile);
00170 }
00171 
00177 static bool CMSATree(TileIndex tile)
00178 {
00179   return IsTileType(tile, MP_TREES);
00180 }
00181 
00187 static bool CMSAForest(TileIndex tile)
00188 {
00189   /* No industry */
00190   if (!IsTileType(tile, MP_INDUSTRY)) return false;
00191 
00192   const Industry *ind = GetIndustryByTile(tile);
00193 
00194   /* No extractive industry */
00195   if ((GetIndustrySpec(ind->type)->life_type & INDUSTRYLIFE_ORGANIC) == 0) return false;
00196 
00197   for (uint i = 0; i < lengthof(ind->produced_cargo); i++) {
00198     /* The industry produces wood. */
00199     if (ind->produced_cargo[i] != CT_INVALID && GetCargo(ind->produced_cargo[i])->label == 'WOOD') return true;
00200   }
00201 
00202   return false;
00203 }
00204 
00205 #define M(x) ((x) - STR_SV_STNAME)
00206 
00207 enum StationNaming {
00208   STATIONNAMING_RAIL = 0,
00209   STATIONNAMING_ROAD = 0,
00210   STATIONNAMING_AIRPORT,
00211   STATIONNAMING_OILRIG,
00212   STATIONNAMING_DOCK,
00213   STATIONNAMING_BUOY,
00214   STATIONNAMING_HELIPORT,
00215 };
00216 
00218 struct StationNameInformation {
00219   uint32 free_names; 
00220   bool *indtypes;    
00221 };
00222 
00231 static bool FindNearIndustryName(TileIndex tile, void *user_data)
00232 {
00233   /* All already found industry types */
00234   StationNameInformation *sni = (StationNameInformation*)user_data;
00235   if (!IsTileType(tile, MP_INDUSTRY)) return false;
00236 
00237   /* If the station name is undefined it means that it doesn't name a station */
00238   IndustryType indtype = GetIndustryType(tile);
00239   if (GetIndustrySpec(indtype)->station_name == STR_UNDEFINED) return false;
00240 
00241   /* In all cases if an industry that provides a name is found two of
00242    * the standard names will be disabled. */
00243   sni->free_names &= ~(1 << M(STR_SV_STNAME_OILFIELD) | 1 << M(STR_SV_STNAME_MINES));
00244   return !sni->indtypes[indtype];
00245 }
00246 
00247 static StringID GenerateStationName(Station *st, TileIndex tile, int flag)
00248 {
00249   static const uint32 _gen_station_name_bits[] = {
00250     0,                                      // 0
00251     1 << M(STR_SV_STNAME_AIRPORT),          // 1
00252     1 << M(STR_SV_STNAME_OILFIELD),         // 2
00253     1 << M(STR_SV_STNAME_DOCKS),            // 3
00254     0x1FF << M(STR_SV_STNAME_BUOY_1),       // 4
00255     1 << M(STR_SV_STNAME_HELIPORT),         // 5
00256   };
00257 
00258   const Town *t = st->town;
00259   uint32 free_names = UINT32_MAX;
00260 
00261   bool indtypes[NUM_INDUSTRYTYPES];
00262   memset(indtypes, 0, sizeof(indtypes));
00263 
00264   const Station *s;
00265   FOR_ALL_STATIONS(s) {
00266     if (s != st && s->town == t) {
00267       if (s->indtype != IT_INVALID) {
00268         indtypes[s->indtype] = true;
00269         continue;
00270       }
00271       uint str = M(s->string_id);
00272       if (str <= 0x20) {
00273         if (str == M(STR_SV_STNAME_FOREST)) {
00274           str = M(STR_SV_STNAME_WOODS);
00275         }
00276         ClrBit(free_names, str);
00277       }
00278     }
00279   }
00280 
00281   if (flag != STATIONNAMING_BUOY) {
00282     TileIndex indtile = tile;
00283     StationNameInformation sni = { free_names, indtypes };
00284     if (CircularTileSearch(&indtile, 7, FindNearIndustryName, &sni)) {
00285       /* An industry has been found nearby */
00286       IndustryType indtype = GetIndustryType(indtile);
00287       const IndustrySpec *indsp = GetIndustrySpec(indtype);
00288       /* STR_NULL means it only disables oil rig/mines */
00289       if (indsp->station_name != STR_NULL) {
00290         st->indtype = indtype;
00291         return STR_SV_STNAME_FALLBACK;
00292       }
00293     }
00294 
00295     /* Oil rigs/mines name could be marked not free by looking for a near by industry. */
00296     free_names = sni.free_names;
00297   }
00298 
00299   /* check default names */
00300   uint32 tmp = free_names & _gen_station_name_bits[flag];
00301   if (tmp != 0) return STR_SV_STNAME + FindFirstBit(tmp);
00302 
00303   /* check mine? */
00304   if (HasBit(free_names, M(STR_SV_STNAME_MINES))) {
00305     if (CountMapSquareAround(tile, CMSAMine) >= 2) {
00306       return STR_SV_STNAME_MINES;
00307     }
00308   }
00309 
00310   /* check close enough to town to get central as name? */
00311   if (DistanceMax(tile, t->xy) < 8) {
00312     if (HasBit(free_names, M(STR_SV_STNAME))) return STR_SV_STNAME;
00313 
00314     if (HasBit(free_names, M(STR_SV_STNAME_CENTRAL))) return STR_SV_STNAME_CENTRAL;
00315   }
00316 
00317   /* Check lakeside */
00318   if (HasBit(free_names, M(STR_SV_STNAME_LAKESIDE)) &&
00319       DistanceFromEdge(tile) < 20 &&
00320       CountMapSquareAround(tile, CMSAWater) >= 5) {
00321     return STR_SV_STNAME_LAKESIDE;
00322   }
00323 
00324   /* Check woods */
00325   if (HasBit(free_names, M(STR_SV_STNAME_WOODS)) && (
00326         CountMapSquareAround(tile, CMSATree) >= 8 ||
00327         CountMapSquareAround(tile, CMSAForest) >= 2)
00328       ) {
00329     return _settings_game.game_creation.landscape == LT_TROPIC ? STR_SV_STNAME_FOREST : STR_SV_STNAME_WOODS;
00330   }
00331 
00332   /* check elevation compared to town */
00333   uint z = GetTileZ(tile);
00334   uint z2 = GetTileZ(t->xy);
00335   if (z < z2) {
00336     if (HasBit(free_names, M(STR_SV_STNAME_VALLEY))) return STR_SV_STNAME_VALLEY;
00337   } else if (z > z2) {
00338     if (HasBit(free_names, M(STR_SV_STNAME_HEIGHTS))) return STR_SV_STNAME_HEIGHTS;
00339   }
00340 
00341   /* check direction compared to town */
00342   static const int8 _direction_and_table[] = {
00343     ~( (1 << M(STR_SV_STNAME_WEST))  | (1 << M(STR_SV_STNAME_EAST)) | (1 << M(STR_SV_STNAME_NORTH)) ),
00344     ~( (1 << M(STR_SV_STNAME_SOUTH)) | (1 << M(STR_SV_STNAME_WEST)) | (1 << M(STR_SV_STNAME_NORTH)) ),
00345     ~( (1 << M(STR_SV_STNAME_SOUTH)) | (1 << M(STR_SV_STNAME_EAST)) | (1 << M(STR_SV_STNAME_NORTH)) ),
00346     ~( (1 << M(STR_SV_STNAME_SOUTH)) | (1 << M(STR_SV_STNAME_WEST)) | (1 << M(STR_SV_STNAME_EAST)) ),
00347   };
00348 
00349   free_names &= _direction_and_table[
00350     (TileX(tile) < TileX(t->xy)) +
00351     (TileY(tile) < TileY(t->xy)) * 2];
00352 
00353   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));
00354   return (tmp == 0) ? STR_SV_STNAME_FALLBACK : (STR_SV_STNAME + FindFirstBit(tmp));
00355 }
00356 #undef M
00357 
00363 static Station *GetClosestDeletedStation(TileIndex tile)
00364 {
00365   uint threshold = 8;
00366   Station *best_station = NULL;
00367   Station *st;
00368 
00369   FOR_ALL_STATIONS(st) {
00370     if (st->facilities == 0 && st->owner == _current_company) {
00371       uint cur_dist = DistanceManhattan(tile, st->xy);
00372 
00373       if (cur_dist < threshold) {
00374         threshold = cur_dist;
00375         best_station = st;
00376       }
00377     }
00378   }
00379 
00380   return best_station;
00381 }
00382 
00386 static void UpdateStationVirtCoord(Station *st)
00387 {
00388   Point pt = RemapCoords2(TileX(st->xy) * TILE_SIZE, TileY(st->xy) * TILE_SIZE);
00389 
00390   pt.y -= 32;
00391   if (st->facilities & FACIL_AIRPORT && st->airport_type == AT_OILRIG) pt.y -= 16;
00392 
00393   SetDParam(0, st->index);
00394   SetDParam(1, st->facilities);
00395   UpdateViewportSignPos(&st->sign, pt.x, pt.y, STR_305C_0);
00396 }
00397 
00399 void UpdateAllStationVirtCoord()
00400 {
00401   Station *st;
00402 
00403   FOR_ALL_STATIONS(st) {
00404     UpdateStationVirtCoord(st);
00405   }
00406 }
00407 
00416 static void UpdateStationVirtCoordDirty(Station *st)
00417 {
00418   st->MarkDirty();
00419   UpdateStationVirtCoord(st);
00420   st->MarkDirty();
00421 }
00422 
00427 static uint GetAcceptanceMask(const Station *st)
00428 {
00429   uint mask = 0;
00430 
00431   for (CargoID i = 0; i < NUM_CARGO; i++) {
00432     if (HasBit(st->goods[i].acceptance_pickup, GoodsEntry::ACCEPTANCE)) mask |= 1 << i;
00433   }
00434   return mask;
00435 }
00436 
00440 static void ShowRejectOrAcceptNews(const Station *st, uint num_items, CargoID *cargo, StringID msg)
00441 {
00442   for (uint i = 0; i < num_items; i++) {
00443     SetDParam(i + 1, GetCargo(cargo[i])->name);
00444   }
00445 
00446   SetDParam(0, st->index);
00447   AddNewsItem(msg, NS_ACCEPTANCE, st->xy, st->index);
00448 }
00449 
00458 void GetProductionAroundTiles(AcceptedCargo produced, TileIndex tile,
00459   int w, int h, int rad)
00460 {
00461   memset(produced, 0, sizeof(AcceptedCargo)); // sizeof(AcceptedCargo) != sizeof(produced) (== sizeof(uint *))
00462 
00463   int x = TileX(tile);
00464   int y = TileY(tile);
00465 
00466   /* expand the region by rad tiles on each side
00467    * while making sure that we remain inside the board. */
00468   int x2 = min(x + w + rad, MapSizeX());
00469   int x1 = max(x - rad, 0);
00470 
00471   int y2 = min(y + h + rad, MapSizeY());
00472   int y1 = max(y - rad, 0);
00473 
00474   assert(x1 < x2);
00475   assert(y1 < y2);
00476   assert(w > 0);
00477   assert(h > 0);
00478 
00479   for (int yc = y1; yc != y2; yc++) {
00480     for (int xc = x1; xc != x2; xc++) {
00481       TileIndex tile = TileXY(xc, yc);
00482 
00483       if (!IsTileType(tile, MP_STATION)) {
00484         GetProducedCargoProc *gpc = _tile_type_procs[GetTileType(tile)]->get_produced_cargo_proc;
00485         if (gpc != NULL) {
00486           CargoID cargos[256]; // Required for CBID_HOUSE_PRODUCE_CARGO.
00487           memset(cargos, CT_INVALID, sizeof(cargos));
00488 
00489           gpc(tile, cargos);
00490           for (uint i = 0; i < lengthof(cargos); ++i) {
00491             if (cargos[i] != CT_INVALID) produced[cargos[i]]++;
00492           }
00493         }
00494       }
00495     }
00496   }
00497 }
00498 
00507 void GetAcceptanceAroundTiles(AcceptedCargo accepts, TileIndex tile,
00508   int w, int h, int rad)
00509 {
00510   memset(accepts, 0, sizeof(AcceptedCargo)); // sizeof(AcceptedCargo) != sizeof(accepts) (== sizeof(uint *))
00511 
00512   int x = TileX(tile);
00513   int y = TileY(tile);
00514 
00515   /* expand the region by rad tiles on each side
00516    * while making sure that we remain inside the board. */
00517   int x2 = min(x + w + rad, MapSizeX());
00518   int y2 = min(y + h + rad, MapSizeY());
00519   int x1 = max(x - rad, 0);
00520   int y1 = max(y - rad, 0);
00521 
00522   assert(x1 < x2);
00523   assert(y1 < y2);
00524   assert(w > 0);
00525   assert(h > 0);
00526 
00527   for (int yc = y1; yc != y2; yc++) {
00528     for (int xc = x1; xc != x2; xc++) {
00529       TileIndex tile = TileXY(xc, yc);
00530 
00531       if (!IsTileType(tile, MP_STATION)) {
00532         AcceptedCargo ac;
00533 
00534         GetAcceptedCargo(tile, ac);
00535         for (uint i = 0; i < lengthof(ac); ++i) accepts[i] += ac[i];
00536       }
00537     }
00538   }
00539 }
00540 
00545 static void UpdateStationAcceptance(Station *st, bool show_msg)
00546 {
00547   /* Don't update acceptance for a buoy */
00548   if (st->IsBuoy()) return;
00549 
00550   /* old accepted goods types */
00551   uint old_acc = GetAcceptanceMask(st);
00552 
00553   /* And retrieve the acceptance. */
00554   AcceptedCargo accepts;
00555   if (!st->rect.IsEmpty()) {
00556     GetAcceptanceAroundTiles(
00557       accepts,
00558       TileXY(st->rect.left, st->rect.top),
00559       st->rect.right  - st->rect.left + 1,
00560       st->rect.bottom - st->rect.top  + 1,
00561       st->GetCatchmentRadius()
00562     );
00563   } else {
00564     memset(accepts, 0, sizeof(accepts));
00565   }
00566 
00567   /* Adjust in case our station only accepts fewer kinds of goods */
00568   for (CargoID i = 0; i < NUM_CARGO; i++) {
00569     uint amt = min(accepts[i], 15);
00570 
00571     /* Make sure the station can accept the goods type. */
00572     bool is_passengers = IsCargoInClass(i, CC_PASSENGERS);
00573     if ((!is_passengers && !(st->facilities & (byte)~FACIL_BUS_STOP)) ||
00574         (is_passengers && !(st->facilities & (byte)~FACIL_TRUCK_STOP))) {
00575       amt = 0;
00576     }
00577 
00578     SB(st->goods[i].acceptance_pickup, GoodsEntry::ACCEPTANCE, 1, amt >= 8);
00579   }
00580 
00581   /* Only show a message in case the acceptance was actually changed. */
00582   uint new_acc = GetAcceptanceMask(st);
00583   if (old_acc == new_acc) return;
00584 
00585   /* show a message to report that the acceptance was changed? */
00586   if (show_msg && st->owner == _local_company && st->facilities) {
00587     /* List of accept and reject strings for different number of
00588      * cargo types */
00589     static const StringID accept_msg[] = {
00590       STR_3040_NOW_ACCEPTS,
00591       STR_3041_NOW_ACCEPTS_AND,
00592     };
00593     static const StringID reject_msg[] = {
00594       STR_303E_NO_LONGER_ACCEPTS,
00595       STR_303F_NO_LONGER_ACCEPTS_OR,
00596     };
00597 
00598     /* Array of accepted and rejected cargo types */
00599     CargoID accepts[2] = { CT_INVALID, CT_INVALID };
00600     CargoID rejects[2] = { CT_INVALID, CT_INVALID };
00601     uint num_acc = 0;
00602     uint num_rej = 0;
00603 
00604     /* Test each cargo type to see if its acceptange has changed */
00605     for (CargoID i = 0; i < NUM_CARGO; i++) {
00606       if (HasBit(new_acc, i)) {
00607         if (!HasBit(old_acc, i) && num_acc < lengthof(accepts)) {
00608           /* New cargo is accepted */
00609           accepts[num_acc++] = i;
00610         }
00611       } else {
00612         if (HasBit(old_acc, i) && num_rej < lengthof(rejects)) {
00613           /* Old cargo is no longer accepted */
00614           rejects[num_rej++] = i;
00615         }
00616       }
00617     }
00618 
00619     /* Show news message if there are any changes */
00620     if (num_acc > 0) ShowRejectOrAcceptNews(st, num_acc, accepts, accept_msg[num_acc - 1]);
00621     if (num_rej > 0) ShowRejectOrAcceptNews(st, num_rej, rejects, reject_msg[num_rej - 1]);
00622   }
00623 
00624   /* redraw the station view since acceptance changed */
00625   InvalidateWindowWidget(WC_STATION_VIEW, st->index, SVW_ACCEPTLIST);
00626 }
00627 
00628 static void UpdateStationSignCoord(Station *st)
00629 {
00630   const StationRect *r = &st->rect;
00631 
00632   if (r->IsEmpty()) return; // no tiles belong to this station
00633 
00634   /* clamp sign coord to be inside the station rect */
00635   st->xy = TileXY(ClampU(TileX(st->xy), r->left, r->right), ClampU(TileY(st->xy), r->top, r->bottom));
00636   UpdateStationVirtCoordDirty(st);
00637 }
00638 
00644 static void DeleteStationIfEmpty(Station *st)
00645 {
00646   if (st->facilities == 0) {
00647     st->delete_ctr = 0;
00648     InvalidateWindowData(WC_STATION_LIST, st->owner, 0);
00649   }
00650   /* station remains but it probably lost some parts - station sign should stay in the station boundaries */
00651   UpdateStationSignCoord(st);
00652 }
00653 
00654 static CommandCost ClearTile_Station(TileIndex tile, DoCommandFlag flags);
00655 
00666 CommandCost CheckFlatLandBelow(TileIndex tile, uint w, uint h, DoCommandFlag flags, uint invalid_dirs, StationID *station, bool check_clear = true)
00667 {
00668   CommandCost cost(EXPENSES_CONSTRUCTION);
00669   int allowed_z = -1;
00670 
00671   BEGIN_TILE_LOOP(tile_cur, w, h, tile) {
00672     if (MayHaveBridgeAbove(tile_cur) && IsBridgeAbove(tile_cur)) {
00673       return_cmd_error(STR_5007_MUST_DEMOLISH_BRIDGE_FIRST);
00674     }
00675 
00676     if (!EnsureNoVehicleOnGround(tile_cur)) return CMD_ERROR;
00677 
00678     uint z;
00679     Slope tileh = GetTileSlope(tile_cur, &z);
00680 
00681     /* Prohibit building if
00682      *   1) The tile is "steep" (i.e. stretches two height levels)
00683      *   2) The tile is non-flat and the build_on_slopes switch is disabled
00684      */
00685     if (IsSteepSlope(tileh) ||
00686         ((!_settings_game.construction.build_on_slopes) && tileh != SLOPE_FLAT)) {
00687       return_cmd_error(STR_0007_FLAT_LAND_REQUIRED);
00688     }
00689 
00690     int flat_z = z;
00691     if (tileh != SLOPE_FLAT) {
00692       /* need to check so the entrance to the station is not pointing at a slope.
00693        * This must be valid for all station tiles, as the user can remove single station tiles. */
00694       if ((HasBit(invalid_dirs, DIAGDIR_NE) && !(tileh & SLOPE_NE)) ||
00695           (HasBit(invalid_dirs, DIAGDIR_SE) && !(tileh & SLOPE_SE)) ||
00696           (HasBit(invalid_dirs, DIAGDIR_SW) && !(tileh & SLOPE_SW)) ||
00697           (HasBit(invalid_dirs, DIAGDIR_NW) && !(tileh & SLOPE_NW))) {
00698         return_cmd_error(STR_0007_FLAT_LAND_REQUIRED);
00699       }
00700       cost.AddCost(_price.terraform);
00701       flat_z += TILE_HEIGHT;
00702     }
00703 
00704     /* get corresponding flat level and make sure that all parts of the station have the same level. */
00705     if (allowed_z == -1) {
00706       /* first tile */
00707       allowed_z = flat_z;
00708     } else if (allowed_z != flat_z) {
00709       return_cmd_error(STR_0007_FLAT_LAND_REQUIRED);
00710     }
00711 
00712     /* if station is set, then we have special handling to allow building on top of already existing stations.
00713      * so station points to INVALID_STATION if we can build on any station.
00714      * Or it points to a station if we're only allowed to build on exactly that station. */
00715     if (station != NULL && IsTileType(tile_cur, MP_STATION)) {
00716       if (!IsRailwayStation(tile_cur)) {
00717         return ClearTile_Station(tile_cur, DC_AUTO); // get error message
00718       } else {
00719         StationID st = GetStationIndex(tile_cur);
00720         if (*station == INVALID_STATION) {
00721           *station = st;
00722         } else if (*station != st) {
00723           return_cmd_error(STR_3006_ADJOINS_MORE_THAN_ONE_EXISTING);
00724         }
00725       }
00726     } else if (check_clear) {
00727       CommandCost ret = DoCommand(tile_cur, 0, 0, flags, CMD_LANDSCAPE_CLEAR);
00728       if (CmdFailed(ret)) return ret;
00729       cost.AddCost(ret);
00730     }
00731   } END_TILE_LOOP(tile_cur, w, h, tile)
00732 
00733   return cost;
00734 }
00735 
00736 static bool CanExpandRailroadStation(const Station *st, uint *fin, Axis axis)
00737 {
00738   uint curw = st->trainst_w;
00739   uint curh = st->trainst_h;
00740   TileIndex tile = fin[0];
00741   uint w = fin[1];
00742   uint h = fin[2];
00743 
00744   if (_settings_game.station.nonuniform_stations) {
00745     /* determine new size of train station region.. */
00746     int x = min(TileX(st->train_tile), TileX(tile));
00747     int y = min(TileY(st->train_tile), TileY(tile));
00748     curw = max(TileX(st->train_tile) + curw, TileX(tile) + w) - x;
00749     curh = max(TileY(st->train_tile) + curh, TileY(tile) + h) - y;
00750     tile = TileXY(x, y);
00751   } else {
00752     /* do not allow modifying non-uniform stations,
00753      * the uniform-stations code wouldn't handle it well */
00754     BEGIN_TILE_LOOP(t, st->trainst_w, st->trainst_h, st->train_tile)
00755       if (!st->TileBelongsToRailStation(t)) { // there may be adjoined station
00756         _error_message = STR_NONUNIFORM_STATIONS_DISALLOWED;
00757         return false;
00758       }
00759     END_TILE_LOOP(t, st->trainst_w, st->trainst_h, st->train_tile)
00760 
00761     /* check so the orientation is the same */
00762     if (GetRailStationAxis(st->train_tile) != axis) {
00763       _error_message = STR_NONUNIFORM_STATIONS_DISALLOWED;
00764       return false;
00765     }
00766 
00767     /* check if the new station adjoins the old station in either direction */
00768     if (curw == w && st->train_tile == tile + TileDiffXY(0, h)) {
00769       /* above */
00770       curh += h;
00771     } else if (curw == w && st->train_tile == tile - TileDiffXY(0, curh)) {
00772       /* below */
00773       tile -= TileDiffXY(0, curh);
00774       curh += h;
00775     } else if (curh == h && st->train_tile == tile + TileDiffXY(w, 0)) {
00776       /* to the left */
00777       curw += w;
00778     } else if (curh == h && st->train_tile == tile - TileDiffXY(curw, 0)) {
00779       /* to the right */
00780       tile -= TileDiffXY(curw, 0);
00781       curw += w;
00782     } else {
00783       _error_message = STR_NONUNIFORM_STATIONS_DISALLOWED;
00784       return false;
00785     }
00786   }
00787   /* make sure the final size is not too big. */
00788   if (curw > _settings_game.station.station_spread || curh > _settings_game.station.station_spread) {
00789     _error_message = STR_306C_STATION_TOO_SPREAD_OUT;
00790     return false;
00791   }
00792 
00793   /* now tile contains the new value for st->train_tile
00794    * curw, curh contain the new value for width and height */
00795   fin[0] = tile;
00796   fin[1] = curw;
00797   fin[2] = curh;
00798   return true;
00799 }
00800 
00801 static inline byte *CreateSingle(byte *layout, int n)
00802 {
00803   int i = n;
00804   do *layout++ = 0; while (--i);
00805   layout[((n - 1) >> 1) - n] = 2;
00806   return layout;
00807 }
00808 
00809 static inline byte *CreateMulti(byte *layout, int n, byte b)
00810 {
00811   int i = n;
00812   do *layout++ = b; while (--i);
00813   if (n > 4) {
00814     layout[0 - n] = 0;
00815     layout[n - 1 - n] = 0;
00816   }
00817   return layout;
00818 }
00819 
00820 static void GetStationLayout(byte *layout, int numtracks, int plat_len, const StationSpec *statspec)
00821 {
00822   if (statspec != NULL && statspec->lengths >= plat_len &&
00823       statspec->platforms[plat_len - 1] >= numtracks &&
00824       statspec->layouts[plat_len - 1][numtracks - 1]) {
00825     /* Custom layout defined, follow it. */
00826     memcpy(layout, statspec->layouts[plat_len - 1][numtracks - 1],
00827       plat_len * numtracks);
00828     return;
00829   }
00830 
00831   if (plat_len == 1) {
00832     CreateSingle(layout, numtracks);
00833   } else {
00834     if (numtracks & 1) layout = CreateSingle(layout, plat_len);
00835     numtracks >>= 1;
00836 
00837     while (--numtracks >= 0) {
00838       layout = CreateMulti(layout, plat_len, 4);
00839       layout = CreateMulti(layout, plat_len, 6);
00840     }
00841   }
00842 }
00843 
00858 CommandCost CmdBuildRailroadStation(TileIndex tile_org, DoCommandFlag flags, uint32 p1, uint32 p2, const char *text)
00859 {
00860   /* Does the authority allow this? */
00861   if (!CheckIfAuthorityAllowsNewStation(tile_org, flags)) return CMD_ERROR;
00862   if (!ValParamRailtype((RailType)(p1 & 0xF))) return CMD_ERROR;
00863 
00864   /* unpack parameters */
00865   Axis axis = Extract<Axis, 4>(p1);
00866   uint numtracks = GB(p1,  8, 8);
00867   uint plat_len  = GB(p1, 16, 8);
00868 
00869   int w_org, h_org;
00870   if (axis == AXIS_X) {
00871     w_org = plat_len;
00872     h_org = numtracks;
00873   } else {
00874     h_org = plat_len;
00875     w_org = numtracks;
00876   }
00877 
00878   StationID station_to_join = GB(p2, 16, 16);
00879   bool reuse = (station_to_join != NEW_STATION);
00880   if (!reuse) station_to_join = INVALID_STATION;
00881   bool distant_join = (station_to_join != INVALID_STATION);
00882 
00883   if (distant_join && (!_settings_game.station.distant_join_stations || !IsValidStationID(station_to_join))) return CMD_ERROR;
00884 
00885   if (h_org > _settings_game.station.station_spread || w_org > _settings_game.station.station_spread) return CMD_ERROR;
00886 
00887   /* these values are those that will be stored in train_tile and station_platforms */
00888   uint finalvalues[3];
00889   finalvalues[0] = tile_org;
00890   finalvalues[1] = w_org;
00891   finalvalues[2] = h_org;
00892 
00893   /* Make sure the area below consists of clear tiles. (OR tiles belonging to a certain rail station) */
00894   StationID est = INVALID_STATION;
00895   /* If DC_EXEC is in flag, do not want to pass it to CheckFlatLandBelow, because of a nice bug
00896    * for detail info, see:
00897    * https://sourceforge.net/tracker/index.php?func=detail&aid=1029064&group_id=103924&atid=636365 */
00898   CommandCost ret = CheckFlatLandBelow(tile_org, w_org, h_org, flags & ~DC_EXEC, 5 << axis, _settings_game.station.nonuniform_stations ? &est : NULL);
00899   if (CmdFailed(ret)) return ret;
00900   CommandCost cost(EXPENSES_CONSTRUCTION, ret.GetCost() + (numtracks * _price.train_station_track + _price.train_station_length) * plat_len);
00901 
00902   Station *st = NULL;
00903   bool check_surrounding = true;
00904 
00905   if (_settings_game.station.adjacent_stations) {
00906     if (est != INVALID_STATION) {
00907       if (HasBit(p1, 24) && est != station_to_join) {
00908         /* You can't build an adjacent station over the top of one that
00909          * already exists. */
00910         return_cmd_error(STR_MUST_REMOVE_RAILWAY_STATION_FIRST);
00911       } else {
00912         /* Extend the current station, and don't check whether it will
00913          * be near any other stations. */
00914         st = GetStation(est);
00915         check_surrounding = false;
00916       }
00917     } else {
00918       /* There's no station here. Don't check the tiles surrounding this
00919        * one if the company wanted to build an adjacent station. */
00920       if (HasBit(p1, 24)) check_surrounding = false;
00921     }
00922   }
00923 
00924   if (check_surrounding) {
00925     /* Make sure there are no similar stations around us. */
00926     st = GetStationAround(tile_org, w_org, h_org, est);
00927     if (st == CHECK_STATIONS_ERR) return CMD_ERROR;
00928   }
00929 
00930   /* Distant join */
00931   if (st == NULL && distant_join) st = GetStation(station_to_join);
00932 
00933   /* See if there is a deleted station close to us. */
00934   if (st == NULL && reuse) st = GetClosestDeletedStation(tile_org);
00935 
00936   if (st != NULL) {
00937     /* Reuse an existing station. */
00938     if (st->owner != _current_company)
00939       return_cmd_error(STR_3009_TOO_CLOSE_TO_ANOTHER_STATION);
00940 
00941     if (st->train_tile != INVALID_TILE) {
00942       /* check if we want to expanding an already existing station? */
00943       if (!_settings_game.station.join_stations)
00944         return_cmd_error(STR_3005_TOO_CLOSE_TO_ANOTHER_RAILROAD);
00945       if (!CanExpandRailroadStation(st, finalvalues, axis))
00946         return CMD_ERROR;
00947     }
00948 
00949     /* XXX can't we pack this in the "else" part of the if above? */
00950     if (!st->rect.BeforeAddRect(tile_org, w_org, h_org, StationRect::ADD_TEST)) return CMD_ERROR;
00951   } else {
00952     /* allocate and initialize new station */
00953     if (!Station::CanAllocateItem()) return_cmd_error(STR_3008_TOO_MANY_STATIONS_LOADING);
00954 
00955     if (flags & DC_EXEC) {
00956       st = new Station(tile_org);
00957 
00958       st->town = ClosestTownFromTile(tile_org, UINT_MAX);
00959       st->string_id = GenerateStationName(st, tile_org, STATIONNAMING_RAIL);
00960 
00961       if (IsValidCompanyID(_current_company)) {
00962         SetBit(st->town->have_ratings, _current_company);
00963       }
00964     }
00965   }
00966 
00967   /* Check if the given station class is valid */
00968   if (GB(p2, 0, 8) >= GetNumStationClasses()) return CMD_ERROR;
00969 
00970   /* Check if we can allocate a custom stationspec to this station */
00971   const StationSpec *statspec = GetCustomStationSpec((StationClassID)GB(p2, 0, 8), GB(p2, 8, 8));
00972   int specindex = AllocateSpecToStation(statspec, st, (flags & DC_EXEC) != 0);
00973   if (specindex == -1) return_cmd_error(STR_TOO_MANY_STATION_SPECS);
00974 
00975   if (statspec != NULL) {
00976     /* Perform NewStation checks */
00977 
00978     /* Check if the station size is permitted */
00979     if (HasBit(statspec->disallowed_platforms, numtracks - 1) || HasBit(statspec->disallowed_lengths, plat_len - 1)) {
00980       return CMD_ERROR;
00981     }
00982 
00983     /* Check if the station is buildable */
00984     if (HasBit(statspec->callbackmask, CBM_STATION_AVAIL) && GB(GetStationCallback(CBID_STATION_AVAILABILITY, 0, 0, statspec, NULL, INVALID_TILE), 0, 8) == 0) {
00985       return CMD_ERROR;
00986     }
00987   }
00988 
00989   if (flags & DC_EXEC) {
00990     TileIndexDiff tile_delta;
00991     byte *layout_ptr;
00992     byte numtracks_orig;
00993     Track track;
00994 
00995     /* Now really clear the land below the station
00996      * It should never return CMD_ERROR.. but you never know ;)
00997      * (a bit strange function name for it, but it really does clear the land, when DC_EXEC is in flags) */
00998     ret = CheckFlatLandBelow(tile_org, w_org, h_org, flags, 5 << axis, _settings_game.station.nonuniform_stations ? &est : NULL);
00999     if (CmdFailed(ret)) return ret;
01000 
01001     st->train_tile = finalvalues[0];
01002     st->AddFacility(FACIL_TRAIN, finalvalues[0]);
01003 
01004     st->trainst_w = finalvalues[1];
01005     st->trainst_h = finalvalues[2];
01006 
01007     st->rect.BeforeAddRect(tile_org, w_org, h_org, StationRect::ADD_TRY);
01008 
01009     if (statspec != NULL) {
01010       /* Include this station spec's animation trigger bitmask
01011        * in the station's cached copy. */
01012       st->cached_anim_triggers |= statspec->anim_triggers;
01013     }
01014 
01015     tile_delta = (axis == AXIS_X ? TileDiffXY(1, 0) : TileDiffXY(0, 1));
01016     track = AxisToTrack(axis);
01017 
01018     layout_ptr = AllocaM(byte, numtracks * plat_len);
01019     GetStationLayout(layout_ptr, numtracks, plat_len, statspec);
01020 
01021     numtracks_orig = numtracks;
01022 
01023     SmallVector<Vehicle*, 4> affected_vehicles;
01024     do {
01025       TileIndex tile = tile_org;
01026       int w = plat_len;
01027       do {
01028         byte layout = *layout_ptr++;
01029         if (IsRailwayStationTile(tile) && GetRailwayStationReservation(tile)) {
01030           /* Check for trains having a reservation for this tile. */
01031           Vehicle *v = GetTrainForReservation(tile, AxisToTrack(GetRailStationAxis(tile)));
01032           if (v != NULL) {
01033             FreeTrainTrackReservation(v);
01034             *affected_vehicles.Append() = v;
01035             if (IsRailwayStationTile(v->tile)) SetRailwayStationPlatformReservation(v->tile, TrackdirToExitdir(GetVehicleTrackdir(v)), false);
01036             for (; v->Next() != NULL; v = v->Next()) ;
01037             if (IsRailwayStationTile(v->tile)) SetRailwayStationPlatformReservation(v->tile, TrackdirToExitdir(ReverseTrackdir(GetVehicleTrackdir(v))), false);
01038           }
01039         }
01040 
01041         byte old_specindex = IsTileType(tile, MP_STATION) ? GetCustomStationSpecIndex(tile) : 0;
01042         MakeRailStation(tile, st->owner, st->index, axis, layout & ~1, (RailType)GB(p1, 0, 4));
01043         /* Free the spec if we overbuild something */
01044         DeallocateSpecFromStation(st, old_specindex);
01045 
01046         SetCustomStationSpecIndex(tile, specindex);
01047         SetStationTileRandomBits(tile, GB(Random(), 0, 4));
01048         SetStationAnimationFrame(tile, 0);
01049 
01050         if (statspec != NULL) {
01051           /* Use a fixed axis for GetPlatformInfo as our platforms / numtracks are always the right way around */
01052           uint32 platinfo = GetPlatformInfo(AXIS_X, 0, plat_len, numtracks_orig, plat_len - w, numtracks_orig - numtracks, false);
01053 
01054           /* As the station is not yet completely finished, the station does not yet exist. */
01055           uint16 callback = GetStationCallback(CBID_STATION_TILE_LAYOUT, platinfo, 0, statspec, NULL, tile);
01056           if (callback != CALLBACK_FAILED && callback < 8) SetStationGfx(tile, (callback & ~1) + axis);
01057 
01058           /* Trigger station animation -- after building? */
01059           StationAnimationTrigger(st, tile, STAT_ANIM_BUILT);
01060         }
01061 
01062         tile += tile_delta;
01063       } while (--w);
01064       AddTrackToSignalBuffer(tile_org, track, _current_company);
01065       YapfNotifyTrackLayoutChange(tile_org, track);
01066       tile_org += tile_delta ^ TileDiffXY(1, 1); // perpendicular to tile_delta
01067     } while (--numtracks);
01068 
01069     for (uint i = 0; i < affected_vehicles.Length(); ++i) {
01070       /* Restore reservations of trains. */
01071       Vehicle *v = affected_vehicles[i];
01072       if (IsRailwayStationTile(v->tile)) SetRailwayStationPlatformReservation(v->tile, TrackdirToExitdir(GetVehicleTrackdir(v)), true);
01073       TryPathReserve(v, true, true);
01074       for (; v->Next() != NULL; v = v->Next()) ;
01075       if (IsRailwayStationTile(v->tile)) SetRailwayStationPlatformReservation(v->tile, TrackdirToExitdir(ReverseTrackdir(GetVehicleTrackdir(v))), true);
01076     }
01077 
01078     st->MarkTilesDirty(false);
01079     UpdateStationVirtCoordDirty(st);
01080     UpdateStationAcceptance(st, false);
01081     InvalidateWindowData(WC_SELECT_STATION, 0, 0);
01082     InvalidateWindowData(WC_STATION_LIST, st->owner, 0);
01083     InvalidateWindowWidget(WC_STATION_VIEW, st->index, SVW_TRAINS);
01084   }
01085 
01086   return cost;
01087 }
01088 
01089 static void MakeRailwayStationAreaSmaller(Station *st)
01090 {
01091   uint w = st->trainst_w;
01092   uint h = st->trainst_h;
01093   TileIndex tile = st->train_tile;
01094 
01095 restart:
01096 
01097   /* too small? */
01098   if (w != 0 && h != 0) {
01099     /* check the left side, x = constant, y changes */
01100     for (uint i = 0; !st->TileBelongsToRailStation(tile + TileDiffXY(0, i));) {
01101       /* the left side is unused? */
01102       if (++i == h) {
01103         tile += TileDiffXY(1, 0);
01104         w--;
01105         goto restart;
01106       }
01107     }
01108 
01109     /* check the right side, x = constant, y changes */
01110     for (uint i = 0; !st->TileBelongsToRailStation(tile + TileDiffXY(w - 1, i));) {
01111       /* the right side is unused? */
01112       if (++i == h) {
01113         w--;
01114         goto restart;
01115       }
01116     }
01117 
01118     /* check the upper side, y = constant, x changes */
01119     for (uint i = 0; !st->TileBelongsToRailStation(tile + TileDiffXY(i, 0));) {
01120       /* the left side is unused? */
01121       if (++i == w) {
01122         tile += TileDiffXY(0, 1);
01123         h--;
01124         goto restart;
01125       }
01126     }
01127 
01128     /* check the lower side, y = constant, x changes */
01129     for (uint i = 0; !st->TileBelongsToRailStation(tile + TileDiffXY(i, h - 1));) {
01130       /* the left side is unused? */
01131       if (++i == w) {
01132         h--;
01133         goto restart;
01134       }
01135     }
01136   } else {
01137     tile = INVALID_TILE;
01138   }
01139 
01140   st->trainst_w = w;
01141   st->trainst_h = h;
01142   st->train_tile = tile;
01143 }
01144 
01152 CommandCost CmdRemoveFromRailroadStation(TileIndex tile, DoCommandFlag flags, uint32 p1, uint32 p2, const char *text)
01153 {
01154   TileIndex start = p1 == 0 ? tile : p1;
01155 
01156   /* Count of the number of tiles removed */
01157   int quantity = 0;
01158 
01159   if (tile >= MapSize() || start >= MapSize()) return CMD_ERROR;
01160 
01161   /* make sure sx,sy are smaller than ex,ey */
01162   int ex = TileX(tile);
01163   int ey = TileY(tile);
01164   int sx = TileX(start);
01165   int sy = TileY(start);
01166   if (ex < sx) Swap(ex, sx);
01167   if (ey < sy) Swap(ey, sy);
01168   tile = TileXY(sx, sy);
01169 
01170   int size_x = ex - sx + 1;
01171   int size_y = ey - sy + 1;
01172 
01173   /* Do the action for every tile into the area */
01174   BEGIN_TILE_LOOP(tile2, size_x, size_y, tile) {
01175     /* Make sure the specified tile is a railroad station */
01176     if (!IsTileType(tile2, MP_STATION) || !IsRailwayStation(tile2)) {
01177       continue;
01178     }
01179 
01180     /* If there is a vehicle on ground, do not allow to remove (flood) the tile */
01181     if (!EnsureNoVehicleOnGround(tile2)) {
01182       continue;
01183     }
01184 
01185     /* Check ownership of station */
01186     Station *st = GetStationByTile(tile2);
01187     if (_current_company != OWNER_WATER && !CheckOwnership(st->owner)) {
01188       continue;
01189     }
01190 
01191     /* Do not allow removing from stations if non-uniform stations are not enabled
01192      * The check must be here to give correct error message
01193      */
01194     if (!_settings_game.station.nonuniform_stations) return_cmd_error(STR_NONUNIFORM_STATIONS_DISALLOWED);
01195 
01196     /* If we reached here, the tile is valid so increase the quantity of tiles we will remove */
01197     quantity++;
01198 
01199     if (flags & DC_EXEC) {
01200       /* read variables before the station tile is removed */
01201       uint specindex = GetCustomStationSpecIndex(tile2);
01202       Track track = GetRailStationTrack(tile2);
01203       Owner owner = GetTileOwner(tile2);
01204       Vehicle *v = NULL;
01205 
01206       if (GetRailwayStationReservation(tile2)) {
01207         v = GetTrainForReservation(tile2, track);
01208         if (v != NULL) {
01209           /* Free train reservation. */
01210           FreeTrainTrackReservation(v);
01211           if (IsRailwayStationTile(v->tile)) SetRailwayStationPlatformReservation(v->tile, TrackdirToExitdir(GetVehicleTrackdir(v)), false);
01212           Vehicle *temp = v;
01213           for (; temp->Next() != NULL; temp = temp->Next()) ;
01214           if (IsRailwayStationTile(temp->tile)) SetRailwayStationPlatformReservation(temp->tile, TrackdirToExitdir(ReverseTrackdir(GetVehicleTrackdir(temp))), false);
01215         }
01216       }
01217 
01218       DoClearSquare(tile2);
01219       st->rect.AfterRemoveTile(st, tile2);
01220       AddTrackToSignalBuffer(tile2, track, owner);
01221       YapfNotifyTrackLayoutChange(tile2, track);
01222 
01223       DeallocateSpecFromStation(st, specindex);
01224 
01225       /* now we need to make the "spanned" area of the railway station smaller
01226        * if we deleted something at the edges.
01227        * we also need to adjust train_tile. */
01228       MakeRailwayStationAreaSmaller(st);
01229       st->MarkTilesDirty(false);
01230       UpdateStationSignCoord(st);
01231 
01232       if (v != NULL) {
01233         /* Restore station reservation. */
01234         if (IsRailwayStationTile(v->tile)) SetRailwayStationPlatformReservation(v->tile, TrackdirToExitdir(GetVehicleTrackdir(v)), true);
01235         TryPathReserve(v, true, true);
01236         for (; v->Next() != NULL; v = v->Next()) ;
01237         if (IsRailwayStationTile(v->tile)) SetRailwayStationPlatformReservation(v->tile, TrackdirToExitdir(ReverseTrackdir(GetVehicleTrackdir(v))), true);
01238       }
01239 
01240       /* if we deleted the whole station, delete the train facility. */
01241       if (st->train_tile == INVALID_TILE) {
01242         st->facilities &= ~FACIL_TRAIN;
01243         InvalidateWindowWidget(WC_STATION_VIEW, st->index, SVW_TRAINS);
01244         UpdateStationVirtCoordDirty(st);
01245         DeleteStationIfEmpty(st);
01246       }
01247     }
01248   } END_TILE_LOOP(tile2, size_x, size_y, tile)
01249 
01250   /* If we've not removed any tiles, give an error */
01251   if (quantity == 0) return CMD_ERROR;
01252 
01253   return CommandCost(EXPENSES_CONSTRUCTION, _price.remove_rail_station * quantity);
01254 }
01255 
01256 
01257 static CommandCost RemoveRailroadStation(Station *st, TileIndex tile, DoCommandFlag flags)
01258 {
01259   /* if there is flooding and non-uniform stations are enabled, remove platforms tile by tile */
01260   if (_current_company == OWNER_WATER && _settings_game.station.nonuniform_stations) {
01261     return DoCommand(tile, 0, 0, DC_EXEC, CMD_REMOVE_FROM_RAILROAD_STATION);
01262   }
01263 
01264   /* Current company owns the station? */
01265   if (_current_company != OWNER_WATER && !CheckOwnership(st->owner)) return CMD_ERROR;
01266 
01267   /* determine width and height of platforms */
01268   tile = st->train_tile;
01269   int w = st->trainst_w;
01270   int h = st->trainst_h;
01271 
01272   assert(w != 0 && h != 0);
01273 
01274   CommandCost cost(EXPENSES_CONSTRUCTION);
01275   /* clear all areas of the station */
01276   do {
01277     int w_bak = w;
01278     do {
01279       /* for nonuniform stations, only remove tiles that are actually train station tiles */
01280       if (st->TileBelongsToRailStation(tile)) {
01281         if (!EnsureNoVehicleOnGround(tile))
01282           return CMD_ERROR;
01283         cost.AddCost(_price.remove_rail_station);
01284         if (flags & DC_EXEC) {
01285           /* read variables before the station tile is removed */
01286           Track track = GetRailStationTrack(tile);
01287           Owner owner = GetTileOwner(tile); // _current_company can be OWNER_WATER
01288           Vehicle *v = NULL;
01289           if (GetRailwayStationReservation(tile)) {
01290             v = GetTrainForReservation(tile, track);
01291             if (v != NULL) FreeTrainTrackReservation(v);
01292           }
01293           DoClearSquare(tile);
01294           AddTrackToSignalBuffer(tile, track, owner);
01295           YapfNotifyTrackLayoutChange(tile, track);
01296           if (v != NULL) TryPathReserve(v, true);
01297         }
01298       }
01299       tile += TileDiffXY(1, 0);
01300     } while (--w);
01301     w = w_bak;
01302     tile += TileDiffXY(-w, 1);
01303   } while (--h);
01304 
01305   if (flags & DC_EXEC) {
01306     st->rect.AfterRemoveRect(st, st->train_tile, st->trainst_w, st->trainst_h);
01307 
01308     st->train_tile = INVALID_TILE;
01309     st->trainst_w = st->trainst_h = 0;
01310     st->facilities &= ~FACIL_TRAIN;
01311 
01312     free(st->speclist);
01313     st->num_specs = 0;
01314     st->speclist  = NULL;
01315     st->cached_anim_triggers = 0;
01316 
01317     InvalidateWindowWidget(WC_STATION_VIEW, st->index, SVW_TRAINS);
01318     UpdateStationVirtCoordDirty(st);
01319     DeleteStationIfEmpty(st);
01320   }
01321 
01322   return cost;
01323 }
01324 
01330 static RoadStop **FindRoadStopSpot(bool truck_station, Station *st)
01331 {
01332   RoadStop **primary_stop = (truck_station) ? &st->truck_stops : &st->bus_stops;
01333 
01334   if (*primary_stop == NULL) {
01335     /* we have no roadstop of the type yet, so write a "primary stop" */
01336     return primary_stop;
01337   } else {
01338     /* there are stops already, so append to the end of the list */
01339     RoadStop *stop = *primary_stop;
01340     while (stop->next != NULL) stop = stop->next;
01341     return &stop->next;
01342   }
01343 }
01344 
01355 CommandCost CmdBuildRoadStop(TileIndex tile, DoCommandFlag flags, uint32 p1, uint32 p2, const char *text)
01356 {
01357   bool type = HasBit(p2, 0);
01358   bool is_drive_through = HasBit(p2, 1);
01359   bool build_over_road  = is_drive_through && IsNormalRoadTile(tile);
01360   RoadTypes rts = (RoadTypes)GB(p2, 2, 2);
01361   StationID station_to_join = GB(p2, 16, 16);
01362   bool reuse = (station_to_join != NEW_STATION);
01363   if (!reuse) station_to_join = INVALID_STATION;
01364   bool distant_join = (station_to_join != INVALID_STATION);
01365   Owner tram_owner = _current_company;
01366   Owner road_owner = _current_company;
01367 
01368   if (distant_join && (!_settings_game.station.distant_join_stations || !IsValidStationID(station_to_join))) return CMD_ERROR;
01369 
01370   if (!AreValidRoadTypes(rts) || !HasRoadTypesAvail(_current_company, rts)) return CMD_ERROR;
01371 
01372   /* Trams only have drive through stops */
01373   if (!is_drive_through && HasBit(rts, ROADTYPE_TRAM)) return CMD_ERROR;
01374 
01375   /* Saveguard the parameters */
01376   if (!IsValidDiagDirection((DiagDirection)p1)) return CMD_ERROR;
01377   /* If it is a drive-through stop check for valid axis */
01378   if (is_drive_through && !IsValidAxis((Axis)p1)) return CMD_ERROR;
01379   /* Road bits in the wrong direction */
01380   if (build_over_road && (GetAllRoadBits(tile) & ((Axis)p1 == AXIS_X ? ROAD_Y : ROAD_X)) != 0) return_cmd_error(STR_DRIVE_THROUGH_ERROR_DIRECTION);
01381 
01382   if (!CheckIfAuthorityAllowsNewStation(tile, flags)) return CMD_ERROR;
01383 
01384   RoadTypes cur_rts = IsNormalRoadTile(tile) ? GetRoadTypes(tile) : ROADTYPES_NONE;
01385   uint num_roadbits = 0;
01386   /* Not allowed to build over this road */
01387   if (build_over_road) {
01388     /* there is a road, check if we can build road+tram stop over it */
01389     if (HasBit(cur_rts, ROADTYPE_ROAD)) {
01390       road_owner = GetRoadOwner(tile, ROADTYPE_ROAD);
01391       if (road_owner == OWNER_TOWN) {
01392         if (!_settings_game.construction.road_stop_on_town_road) return_cmd_error(STR_DRIVE_THROUGH_ERROR_ON_TOWN_ROAD);
01393       } else if (!_settings_game.construction.road_stop_on_competitor_road && road_owner != OWNER_NONE && !CheckOwnership(road_owner)) {
01394         return CMD_ERROR;
01395       }
01396       num_roadbits += CountBits(GetRoadBits(tile, ROADTYPE_ROAD));
01397     }
01398 
01399     /* there is a tram, check if we can build road+tram stop over it */
01400     if (HasBit(cur_rts, ROADTYPE_TRAM)) {
01401       tram_owner = GetRoadOwner(tile, ROADTYPE_TRAM);
01402       if (!_settings_game.construction.road_stop_on_competitor_road && tram_owner != OWNER_NONE && !CheckOwnership(tram_owner)) {
01403         return CMD_ERROR;
01404       }
01405       num_roadbits += CountBits(GetRoadBits(tile, ROADTYPE_TRAM));
01406     }
01407 
01408     /* Don't allow building the roadstop when vehicles are already driving on it */
01409     if (!EnsureNoVehicleOnGround(tile)) return CMD_ERROR;
01410 
01411     /* Do not remove roadtypes! */
01412     rts |= cur_rts;
01413   }
01414 
01415   CommandCost cost = CheckFlatLandBelow(tile, 1, 1, flags, is_drive_through ? 5 << p1 : 1 << p1, NULL, !build_over_road);
01416   if (CmdFailed(cost)) return cost;
01417   uint roadbits_to_build = CountBits(rts) * 2 - num_roadbits;
01418   cost.AddCost(_price.build_road * roadbits_to_build);
01419 
01420   Station *st = NULL;
01421 
01422   if (!_settings_game.station.adjacent_stations || !HasBit(p2, 5)) {
01423     st = GetStationAround(tile, 1, 1, INVALID_STATION);
01424     if (st == CHECK_STATIONS_ERR) return CMD_ERROR;
01425   }
01426 
01427   /* Distant join */
01428   if (st == NULL && distant_join) st = GetStation(station_to_join);
01429 
01430   /* Find a deleted station close to us */
01431   if (st == NULL && reuse) st = GetClosestDeletedStation(tile);
01432 
01433   /* give us a road stop in the list, and check if something went wrong */
01434   if (!RoadStop::CanAllocateItem()) return_cmd_error(type ? STR_TOO_MANY_TRUCK_STOPS : STR_TOO_MANY_BUS_STOPS);
01435 
01436   if (st != NULL &&
01437       GetNumRoadStopsInStation(st, ROADSTOP_BUS) + GetNumRoadStopsInStation(st, ROADSTOP_TRUCK) >= RoadStop::LIMIT) {
01438     return_cmd_error(type ? STR_TOO_MANY_TRUCK_STOPS : STR_TOO_MANY_BUS_STOPS);
01439   }
01440 
01441   if (st != NULL) {
01442     if (st->owner != _current_company) {
01443       return_cmd_error(STR_3009_TOO_CLOSE_TO_ANOTHER_STATION);
01444     }
01445 
01446     if (!st->rect.BeforeAddTile(tile, StationRect::ADD_TEST)) return CMD_ERROR;
01447   } else {
01448     /* allocate and initialize new station */
01449     if (!Station::CanAllocateItem()) return_cmd_error(STR_3008_TOO_MANY_STATIONS_LOADING);
01450 
01451     if (flags & DC_EXEC) {
01452       st = new Station(tile);
01453 
01454       st->town = ClosestTownFromTile(tile, UINT_MAX);
01455       st->string_id = GenerateStationName(st, tile, STATIONNAMING_ROAD);
01456 
01457       if (IsValidCompanyID(_current_company)) {
01458         SetBit(st->town->have_ratings, _current_company);
01459       }
01460       st->sign.width_1 = 0;
01461     }
01462   }
01463 
01464   cost.AddCost((type) ? _price.build_truck_station : _price.build_bus_station);
01465 
01466   if (flags & DC_EXEC) {
01467     RoadStop *road_stop = new RoadStop(tile);
01468     /* Insert into linked list of RoadStops */
01469     RoadStop **currstop = FindRoadStopSpot(type, st);
01470     *currstop = road_stop;
01471 
01472     /* initialize an empty station */
01473     st->AddFacility((type) ? FACIL_TRUCK_STOP : FACIL_BUS_STOP, tile);
01474 
01475     st->rect.BeforeAddTile(tile, StationRect::ADD_TRY);
01476 
01477     RoadStopType rs_type = type ? ROADSTOP_TRUCK : ROADSTOP_BUS;
01478     if (is_drive_through) {
01479       MakeDriveThroughRoadStop(tile, st->owner, road_owner, tram_owner, st->index, rs_type, rts, (Axis)p1);
01480     } else {
01481       MakeRoadStop(tile, st->owner, st->index, rs_type, rts, (DiagDirection)p1);
01482     }
01483 
01484     UpdateStationVirtCoordDirty(st);
01485     UpdateStationAcceptance(st, false);
01486     InvalidateWindowData(WC_SELECT_STATION, 0, 0);
01487     InvalidateWindowData(WC_STATION_LIST, st->owner, 0);
01488     InvalidateWindowWidget(WC_STATION_VIEW, st->index, SVW_ROADVEHS);
01489   }
01490   return cost;
01491 }
01492 
01493 
01494 static Vehicle *ClearRoadStopStatusEnum(Vehicle *v, void *)
01495 {
01496   if (v->type == VEH_ROAD) v->u.road.state &= RVSB_ROAD_STOP_TRACKDIR_MASK;
01497 
01498   return NULL;
01499 }
01500 
01501 
01508 static CommandCost RemoveRoadStop(Station *st, DoCommandFlag flags, TileIndex tile)
01509 {
01510   if (_current_company != OWNER_WATER && !CheckOwnership(st->owner)) {
01511     return CMD_ERROR;
01512   }
01513 
01514   bool is_truck = IsTruckStop(tile);
01515 
01516   RoadStop **primary_stop;
01517   RoadStop *cur_stop;
01518   if (is_truck) { // truck stop
01519     primary_stop = &st->truck_stops;
01520     cur_stop = GetRoadStopByTile(tile, ROADSTOP_TRUCK);
01521   } else {
01522     primary_stop = &st->bus_stops;
01523     cur_stop = GetRoadStopByTile(tile, ROADSTOP_BUS);
01524   }
01525 
01526   assert(cur_stop != NULL);
01527 
01528   /* don't do the check for drive-through road stops when company bankrupts */
01529   if (IsDriveThroughStopTile(tile) && (flags & DC_BANKRUPT)) {
01530     /* remove the 'going through road stop' status from all vehicles on that tile */
01531     if (flags & DC_EXEC) FindVehicleOnPos(tile, NULL, &ClearRoadStopStatusEnum);
01532   } else {
01533     if (!EnsureNoVehicleOnGround(tile)) return CMD_ERROR;
01534   }
01535 
01536   if (flags & DC_EXEC) {
01537     if (*primary_stop == cur_stop) {
01538       /* removed the first stop in the list */
01539       *primary_stop = cur_stop->next;
01540       /* removed the only stop? */
01541       if (*primary_stop == NULL) {
01542         st->facilities &= (is_truck ? ~FACIL_TRUCK_STOP : ~FACIL_BUS_STOP);
01543       }
01544     } else {
01545       /* tell the predecessor in the list to skip this stop */
01546       RoadStop *pred = *primary_stop;
01547       while (pred->next != cur_stop) pred = pred->next;
01548       pred->next = cur_stop->next;
01549     }
01550 
01551     InvalidateWindowWidget(WC_STATION_VIEW, st->index, SVW_ROADVEHS);
01552     delete cur_stop;
01553 
01554     /* Make sure no vehicle is going to the old roadstop */
01555     Vehicle *v;
01556     FOR_ALL_VEHICLES(v) {
01557       if (v->type == VEH_ROAD &&
01558           v->First() == v &&
01559           v->current_order.IsType(OT_GOTO_STATION) &&
01560           v->dest_tile == tile) {
01561         v->dest_tile = v->GetOrderStationLocation(st->index);
01562       }
01563     }
01564 
01565     DoClearSquare(tile);
01566     st->rect.AfterRemoveTile(st, tile);
01567 
01568     UpdateStationVirtCoordDirty(st);
01569     DeleteStationIfEmpty(st);
01570   }
01571 
01572   return CommandCost(EXPENSES_CONSTRUCTION, (is_truck) ? _price.remove_truck_station : _price.remove_bus_station);
01573 }
01574 
01581 CommandCost CmdRemoveRoadStop(TileIndex tile, DoCommandFlag flags, uint32 p1, uint32 p2, const char *text)
01582 {
01583   /* Make sure the specified tile is a road stop of the correct type */
01584   if (!IsTileType(tile, MP_STATION) || !IsRoadStop(tile) || (uint32)GetRoadStopType(tile) != GB(p2, 0, 1)) return CMD_ERROR;
01585   Station *st = GetStationByTile(tile);
01586   /* Save the stop info before it is removed */
01587   bool is_drive_through = IsDriveThroughStopTile(tile);
01588   RoadTypes rts = GetRoadTypes(tile);
01589   RoadBits road_bits = IsDriveThroughStopTile(tile) ?
01590       ((GetRoadStopDir(tile) == DIAGDIR_NE) ? ROAD_X : ROAD_Y) :
01591       DiagDirToRoadBits(GetRoadStopDir(tile));
01592 
01593   Owner road_owner = GetRoadOwner(tile, ROADTYPE_ROAD);
01594   Owner tram_owner = GetRoadOwner(tile, ROADTYPE_TRAM);
01595   CommandCost ret = RemoveRoadStop(st, flags, tile);
01596 
01597   /* If the stop was a drive-through stop replace the road */
01598   if ((flags & DC_EXEC) && CmdSucceeded(ret) && is_drive_through) {
01599     /* Rebuild the drive throuhg road stop. As a road stop can only be
01600      * removed by the owner of the roadstop, _current_company is the
01601      * owner of the road stop. */
01602     MakeRoadNormal(tile, road_bits, rts, ClosestTownFromTile(tile, UINT_MAX)->index,
01603         road_owner, tram_owner);
01604   }
01605 
01606   return ret;
01607 }
01608 
01609 /* FIXME -- need to move to its corresponding Airport variable*/
01610 
01611 /* Country Airfield (small) */
01612 static const byte _airport_sections_country[] = {
01613   54, 53, 52, 65,
01614   58, 57, 56, 55,
01615   64, 63, 63, 62
01616 };
01617 
01618 /* City Airport (large) */
01619 static const byte _airport_sections_town[] = {
01620   31,  9, 33,  9,  9, 32,
01621   27, 36, 29, 34,  8, 10,
01622   30, 11, 35, 13, 20, 21,
01623   51, 12, 14, 17, 19, 28,
01624   38, 13, 15, 16, 18, 39,
01625   26, 22, 23, 24, 25, 26
01626 };
01627 
01628 /* Metropolitain Airport (large) - 2 runways */
01629 static const byte _airport_sections_metropolitan[] = {
01630    31,  9, 33,  9,  9, 32,
01631    27, 36, 29, 34,  8, 10,
01632    30, 11, 35, 13, 20, 21,
01633   102,  8,  8,  8,  8, 28,
01634    83, 84, 84, 84, 84, 83,
01635    26, 23, 23, 23, 23, 26
01636 };
01637 
01638 /* International Airport (large) - 2 runways */
01639 static const byte _airport_sections_international[] = {
01640   88, 89, 89, 89, 89, 89,  88,
01641   51,  8,  8,  8,  8,  8,  32,
01642   30,  8, 11, 27, 11,  8,  10,
01643   32,  8, 11, 27, 11,  8, 114,
01644   87,  8, 11, 85, 11,  8, 114,
01645   87,  8,  8,  8,  8,  8,  90,
01646   26, 23, 23, 23, 23, 23,  26
01647 };
01648 
01649 /* Intercontinental Airport (vlarge) - 4 runways */
01650 static const byte _airport_sections_intercontinental[] = {
01651   102, 120,  89,  89,  89,  89,  89,  89, 118,
01652   120,  23,  23,  23,  23,  23,  23, 119, 117,
01653    87,  54,  87,   8,   8,   8,   8,  51, 117,
01654    87, 162,  87,  85, 116, 116,   8,   9,  10,
01655    87,   8,   8,  11,  31,  11,   8, 160,  32,
01656    32, 160,   8,  11,  27,  11,   8,   8,  10,
01657    87,   8,   8,  11,  30,  11,   8,   8,  10,
01658    87, 142,   8,  11,  29,  11,  10, 163,  10,
01659    87, 164,  87,   8,   8,   8,  10,  37, 117,
01660    87, 120,  89,  89,  89,  89,  89,  89, 119,
01661   121,  23,  23,  23,  23,  23,  23, 119,  37
01662 };
01663 
01664 
01665 /* Commuter Airfield (small) */
01666 static const byte _airport_sections_commuter[] = {
01667   85, 30, 115, 115, 32,
01668   87, 8,    8,   8, 10,
01669   87, 11,  11,  11, 10,
01670   26, 23,  23,  23, 26
01671 };
01672 
01673 /* Heliport */
01674 static const byte _airport_sections_heliport[] = {
01675   66,
01676 };
01677 
01678 /* Helidepot */
01679 static const byte _airport_sections_helidepot[] = {
01680   124, 32,
01681   122, 123
01682 };
01683 
01684 /* Helistation */
01685 static const byte _airport_sections_helistation[] = {
01686    32, 134, 159, 158,
01687   161, 142, 142, 157
01688 };
01689 
01690 static const byte * const _airport_sections[] = {
01691   _airport_sections_country,           // Country Airfield (small)
01692   _airport_sections_town,              // City Airport (large)
01693   _airport_sections_heliport,          // Heliport
01694   _airport_sections_metropolitan,      // Metropolitain Airport (large)
01695   _airport_sections_international,     // International Airport (xlarge)
01696   _airport_sections_commuter,          // Commuter Airport (small)
01697   _airport_sections_helidepot,         // Helidepot
01698   _airport_sections_intercontinental,  // Intercontinental Airport (xxlarge)
01699   _airport_sections_helistation        // Helistation
01700 };
01701 
01709 static uint GetMinimalAirportDistanceToTile(const AirportFTAClass *afc, TileIndex town_tile, TileIndex airport_tile)
01710 {
01711   uint ttx = TileX(town_tile); // X, Y of town
01712   uint tty = TileY(town_tile);
01713 
01714   uint atx = TileX(airport_tile); // X, Y of northern airport corner
01715   uint aty = TileY(airport_tile);
01716 
01717   uint btx = TileX(airport_tile) + afc->size_x - 1; // X, Y of southern corner
01718   uint bty = TileY(airport_tile) + afc->size_y - 1;
01719 
01720   /* if ttx < atx, dx = atx - ttx
01721    * if atx <= ttx <= btx, dx = 0
01722    * else, dx = ttx - btx (similiar for dy) */
01723   uint dx = ttx < atx ? atx - ttx : (ttx <= btx ? 0 : ttx - btx);
01724   uint dy = tty < aty ? aty - tty : (tty <= bty ? 0 : tty - bty);
01725 
01726   return dx + dy;
01727 }
01728 
01737 uint8 GetAirportNoiseLevelForTown(const AirportFTAClass *afc, TileIndex town_tile, TileIndex tile)
01738 {
01739   /* 0 cannot be accounted, and 1 is the lowest that can be reduced from town.
01740    * So no need to go any further*/
01741   if (afc->noise_level < 2) return afc->noise_level;
01742 
01743   uint distance = GetMinimalAirportDistanceToTile(afc, town_tile, tile);
01744 
01745   /* The steps for measuring noise reduction are based on the "magical" (and arbitrary) 8 base distance
01746    * adding the town_council_tolerance 4 times, as a way to graduate, depending of the tolerance.
01747    * Basically, it says that the less tolerant a town is, the bigger the distance before
01748    * an actual decrease can be granted */
01749   uint8 town_tolerance_distance = 8 + (_settings_game.difficulty.town_council_tolerance * 4);
01750 
01751   /* now, we want to have the distance segmented using the distance judged bareable by town
01752    * This will give us the coefficient of reduction the distance provides. */
01753   uint noise_reduction = distance / town_tolerance_distance;
01754 
01755   /* If the noise reduction equals the airport noise itself, don't give it for free.
01756    * Otherwise, simply reduce the airport's level. */
01757   return noise_reduction >= afc->noise_level ? 1 : afc->noise_level - noise_reduction;
01758 }
01759 
01767 Town *AirportGetNearestTown(const AirportFTAClass *afc, TileIndex airport_tile)
01768 {
01769   Town *t, *nearest = NULL;
01770   uint add = afc->size_x + afc->size_y - 2; // GetMinimalAirportDistanceToTile can differ from DistanceManhattan by this much
01771   uint mindist = UINT_MAX - add; // prevent overflow
01772   FOR_ALL_TOWNS(t) {
01773     if (DistanceManhattan(t->xy, airport_tile) < mindist + add) { // avoid calling GetMinimalAirportDistanceToTile too often
01774       uint dist = GetMinimalAirportDistanceToTile(afc, t->xy, airport_tile);
01775       if (dist < mindist) {
01776         nearest = t;
01777         mindist = dist;
01778       }
01779     }
01780   }
01781 
01782   return nearest;
01783 }
01784 
01785 
01787 void UpdateAirportsNoise()
01788 {
01789   Town *t;
01790   const Station *st;
01791 
01792   FOR_ALL_TOWNS(t) t->noise_reached = 0;
01793 
01794   FOR_ALL_STATIONS(st) {
01795     if (st->airport_tile != INVALID_TILE) {
01796       const AirportFTAClass *afc = GetAirport(st->airport_type);
01797       Town *nearest = AirportGetNearestTown(afc, st->airport_tile);
01798       nearest->noise_reached += GetAirportNoiseLevelForTown(afc, nearest->xy, st->airport_tile);
01799     }
01800   }
01801 }
01802 
01803 
01812 CommandCost CmdBuildAirport(TileIndex tile, DoCommandFlag flags, uint32 p1, uint32 p2, const char *text)
01813 {
01814   bool airport_upgrade = true;
01815   StationID station_to_join = GB(p2, 16, 16);
01816   bool reuse = (station_to_join != NEW_STATION);
01817   if (!reuse) station_to_join = INVALID_STATION;
01818   bool distant_join = (station_to_join != INVALID_STATION);
01819 
01820   if (distant_join && (!_settings_game.station.distant_join_stations || !IsValidStationID(station_to_join))) return CMD_ERROR;
01821 
01822   /* Check if a valid, buildable airport was chosen for construction */
01823   if (p1 >= lengthof(_airport_sections) || !HasBit(GetValidAirports(), p1)) return CMD_ERROR;
01824 
01825   if (!CheckIfAuthorityAllowsNewStation(tile, flags)) {
01826     return CMD_ERROR;
01827   }
01828 
01829   Town *t = ClosestTownFromTile(tile, UINT_MAX);
01830   const AirportFTAClass *afc = GetAirport(p1);
01831   int w = afc->size_x;
01832   int h = afc->size_y;
01833   Station *st = NULL;
01834 
01835   if (w > _settings_game.station.station_spread || h > _settings_game.station.station_spread) {
01836     _error_message = STR_306C_STATION_TOO_SPREAD_OUT;
01837     return CMD_ERROR;
01838   }
01839 
01840   CommandCost cost = CheckFlatLandBelow(tile, w, h, flags, 0, NULL);
01841   if (CmdFailed(cost)) return cost;
01842 
01843   /* Go get the final noise level, that is base noise minus factor from distance to town center */
01844   Town *nearest = AirportGetNearestTown(afc, tile);
01845   uint newnoise_level = GetAirportNoiseLevelForTown(afc, nearest->xy, tile);
01846 
01847   /* Check if local auth would allow a new airport */
01848   StringID authority_refuse_message = STR_NULL;
01849 
01850   if (_settings_game.economy.station_noise_level) {
01851     /* do not allow to build a new airport if this raise the town noise over the maximum allowed by town */
01852     if ((nearest->noise_reached + newnoise_level) > nearest->MaxTownNoise()) {
01853       authority_refuse_message = STR_LOCAL_AUTHORITY_REFUSES_NOISE;
01854     }
01855   } else {
01856     uint num = 0;
01857     const Station *st;
01858     FOR_ALL_STATIONS(st) {
01859       if (st->town == t && st->facilities & FACIL_AIRPORT && st->airport_type != AT_OILRIG) num++;
01860     }
01861     if (num >= 2) {
01862       authority_refuse_message = STR_2035_LOCAL_AUTHORITY_REFUSES;
01863     }
01864   }
01865 
01866   if (authority_refuse_message != STR_NULL) {
01867     SetDParam(0, t->index);
01868     return_cmd_error(authority_refuse_message);
01869   }
01870 
01871   if (!_settings_game.station.adjacent_stations || !HasBit(p2, 0)) {
01872     st = GetStationAround(tile, w, h, INVALID_STATION);
01873     if (st == CHECK_STATIONS_ERR) return CMD_ERROR;
01874   } else {
01875     st = NULL;
01876   }
01877 
01878   /* Distant join */
01879   if (st == NULL && distant_join) st = GetStation(station_to_join);
01880 
01881   /* Find a deleted station close to us */
01882   if (st == NULL && reuse) st = GetClosestDeletedStation(tile);
01883 
01884   if (st != NULL) {
01885     if (st->owner != _current_company) {
01886       return_cmd_error(STR_3009_TOO_CLOSE_TO_ANOTHER_STATION);
01887     }
01888 
01889     if (!st->rect.BeforeAddRect(tile, w, h, StationRect::ADD_TEST)) return CMD_ERROR;
01890 
01891     if (st->airport_tile != INVALID_TILE) {
01892       return_cmd_error(STR_300D_TOO_CLOSE_TO_ANOTHER_AIRPORT);
01893     }
01894   } else {
01895     airport_upgrade = false;
01896 
01897     /* allocate and initialize new station */
01898     if (!Station::CanAllocateItem()) return_cmd_error(STR_3008_TOO_MANY_STATIONS_LOADING);
01899 
01900     if (flags & DC_EXEC) {
01901       st = new Station(tile);
01902 
01903       st->town = t;
01904       st->string_id = GenerateStationName(st, tile, !(afc->flags & AirportFTAClass::AIRPLANES) ? STATIONNAMING_HELIPORT : STATIONNAMING_AIRPORT);
01905 
01906       if (IsValidCompanyID(_current_company)) {
01907         SetBit(st->town->have_ratings, _current_company);
01908       }
01909       st->sign.width_1 = 0;
01910     }
01911   }
01912 
01913   cost.AddCost(_price.build_airport * w * h);
01914 
01915   if (flags & DC_EXEC) {
01916     /* Always add the noise, so there will be no need to recalculate when option toggles */
01917     nearest->noise_reached += newnoise_level;
01918 
01919     st->airport_tile = tile;
01920     st->AddFacility(FACIL_AIRPORT, tile);
01921     st->airport_type = (byte)p1;
01922     st->airport_flags = 0;
01923 
01924     st->rect.BeforeAddRect(tile, w, h, StationRect::ADD_TRY);
01925 
01926     /* if airport was demolished while planes were en-route to it, the
01927      * positions can no longer be the same (v->u.air.pos), since different
01928      * airports have different indexes. So update all planes en-route to this
01929      * airport. Only update if
01930      * 1. airport is upgraded
01931      * 2. airport is added to existing station (unfortunately unavoideable)
01932      */
01933     if (airport_upgrade) UpdateAirplanesOnNewStation(st);
01934 
01935     {
01936       const byte *b = _airport_sections[p1];
01937 
01938       BEGIN_TILE_LOOP(tile_cur, w, h, tile) {
01939         MakeAirport(tile_cur, st->owner, st->index, *b - ((*b < 67) ? 8 : 24));
01940         b++;
01941       } END_TILE_LOOP(tile_cur, w, h, tile)
01942     }
01943 
01944     UpdateStationVirtCoordDirty(st);
01945     UpdateStationAcceptance(st, false);
01946     InvalidateWindowData(WC_SELECT_STATION, 0, 0);
01947     InvalidateWindowData(WC_STATION_LIST, st->owner, 0);
01948     InvalidateWindowWidget(WC_STATION_VIEW, st->index, SVW_PLANES);
01949 
01950     if (_settings_game.economy.station_noise_level) {
01951       InvalidateWindow(WC_TOWN_VIEW, st->town->index);
01952     }
01953   }
01954 
01955   return cost;
01956 }
01957 
01958 static CommandCost RemoveAirport(Station *st, DoCommandFlag flags)
01959 {
01960   if (_current_company != OWNER_WATER && !CheckOwnership(st->owner)) {
01961     return CMD_ERROR;
01962   }
01963 
01964   TileIndex tile = st->airport_tile;
01965 
01966   const AirportFTAClass *afc = st->Airport();
01967   int w = afc->size_x;
01968   int h = afc->size_y;
01969 
01970   CommandCost cost(EXPENSES_CONSTRUCTION, w * h * _price.remove_airport);
01971 
01972   const Vehicle *v;
01973   FOR_ALL_VEHICLES(v) {
01974     if (!(v->type == VEH_AIRCRAFT && IsNormalAircraft(v))) continue;
01975 
01976     if (v->u.air.targetairport == st->index && v->u.air.state != FLYING) return CMD_ERROR;
01977   }
01978 
01979   BEGIN_TILE_LOOP(tile_cur, w, h, tile) {
01980     if (!EnsureNoVehicleOnGround(tile_cur)) return CMD_ERROR;
01981 
01982     if (flags & DC_EXEC) {
01983       DeleteAnimatedTile(tile_cur);
01984       DoClearSquare(tile_cur);
01985     }
01986   } END_TILE_LOOP(tile_cur, w, h, tile)
01987 
01988   if (flags & DC_EXEC) {
01989     for (uint i = 0; i < afc->nof_depots; ++i) {
01990       DeleteWindowById(
01991         WC_VEHICLE_DEPOT, tile + ToTileIndexDiff(afc->airport_depots[i])
01992       );
01993     }
01994 
01995     /* Go get the final noise level, that is base noise minus factor from distance to town center.
01996      * And as for construction, always remove it, even if the setting is not set, in order to avoid the
01997      * need of recalculation */
01998     Town *nearest = AirportGetNearestTown(afc, tile);
01999     nearest->noise_reached -= GetAirportNoiseLevelForTown(afc, nearest->xy, tile);
02000 
02001     st->rect.AfterRemoveRect(st, tile, w, h);
02002 
02003     st->airport_tile = INVALID_TILE;
02004     st->facilities &= ~FACIL_AIRPORT;
02005 
02006     InvalidateWindowWidget(WC_STATION_VIEW, st->index, SVW_PLANES);
02007 
02008     if (_settings_game.economy.station_noise_level) {
02009       InvalidateWindow(WC_TOWN_VIEW, st->town->index);
02010     }
02011 
02012     UpdateStationVirtCoordDirty(st);
02013     DeleteStationIfEmpty(st);
02014   }
02015 
02016   return cost;
02017 }
02018 
02025 CommandCost CmdBuildBuoy(TileIndex tile, DoCommandFlag flags, uint32 p1, uint32 p2, const char *text)
02026 {
02027   if (!IsWaterTile(tile) || tile == 0) return_cmd_error(STR_304B_SITE_UNSUITABLE);
02028   if (MayHaveBridgeAbove(tile) && IsBridgeAbove(tile)) return_cmd_error(STR_5007_MUST_DEMOLISH_BRIDGE_FIRST);
02029 
02030   if (GetTileSlope(tile, NULL) != SLOPE_FLAT) return_cmd_error(STR_304B_SITE_UNSUITABLE);
02031 
02032   /* allocate and initialize new station */
02033   if (!Station::CanAllocateItem()) return_cmd_error(STR_3008_TOO_MANY_STATIONS_LOADING);
02034 
02035   if (flags & DC_EXEC) {
02036     Station *st = new Station(tile);
02037 
02038     st->town = ClosestTownFromTile(tile, UINT_MAX);
02039     st->string_id = GenerateStationName(st, tile, STATIONNAMING_BUOY);
02040 
02041     if (IsValidCompanyID(_current_company)) {
02042       SetBit(st->town->have_ratings, _current_company);
02043     }
02044     st->sign.width_1 = 0;
02045     st->dock_tile = tile;
02046     st->facilities |= FACIL_DOCK;
02047     /* Buoys are marked in the Station struct by this flag. Yes, it is this
02048      * braindead.. */
02049     st->had_vehicle_of_type |= HVOT_BUOY;
02050     st->owner = OWNER_NONE;
02051 
02052     st->build_date = _date;
02053 
02054     MakeBuoy(tile, st->index, GetWaterClass(tile));
02055 
02056     UpdateStationVirtCoordDirty(st);
02057     UpdateStationAcceptance(st, false);
02058     InvalidateWindowData(WC_STATION_LIST, st->owner, 0);
02059     InvalidateWindowWidget(WC_STATION_VIEW, st->index, SVW_SHIPS);
02060   }
02061 
02062   return CommandCost(EXPENSES_CONSTRUCTION, _price.build_dock);
02063 }
02064 
02071 bool HasStationInUse(StationID station, CompanyID company)
02072 {
02073   const Vehicle *v;
02074   FOR_ALL_VEHICLES(v) {
02075     if (company == INVALID_COMPANY || v->owner == company) {
02076       const Order *order;
02077       FOR_VEHICLE_ORDERS(v, order) {
02078         if (order->IsType(OT_GOTO_STATION) && order->GetDestination() == station) {
02079           return true;
02080         }
02081       }
02082     }
02083   }
02084   return false;
02085 }
02086 
02087 static CommandCost RemoveBuoy(Station *st, DoCommandFlag flags)
02088 {
02089   /* XXX: strange stuff, allow clearing as invalid company when clearing landscape */
02090   if (!IsValidCompanyID(_current_company) && !(flags & DC_BANKRUPT)) return_cmd_error(INVALID_STRING_ID);
02091 
02092   TileIndex tile = st->dock_tile;
02093 
02094   if (HasStationInUse(st->index, INVALID_COMPANY)) return_cmd_error(STR_BUOY_IS_IN_USE);
02095   /* remove the buoy if there is a ship on tile when company goes bankrupt... */
02096   if (!(flags & DC_BANKRUPT) && !EnsureNoVehicleOnGround(tile)) return CMD_ERROR;
02097 
02098   if (flags & DC_EXEC) {
02099     st->dock_tile = INVALID_TILE;
02100     /* Buoys are marked in the Station struct by this flag. Yes, it is this
02101      * braindead.. */
02102     st->facilities &= ~FACIL_DOCK;
02103     st->had_vehicle_of_type &= ~HVOT_BUOY;
02104 
02105     InvalidateWindowWidget(WC_STATION_VIEW, st->index, SVW_SHIPS);
02106 
02107     /* We have to set the water tile's state to the same state as before the
02108      * buoy was placed. Otherwise one could plant a buoy on a canal edge,
02109      * remove it and flood the land (if the canal edge is at level 0) */
02110     MakeWaterKeepingClass(tile, GetTileOwner(tile));
02111     MarkTileDirtyByTile(tile);
02112 
02113     UpdateStationVirtCoordDirty(st);
02114     DeleteStationIfEmpty(st);
02115   }
02116 
02117   return CommandCost(EXPENSES_CONSTRUCTION, _price.remove_truck_station);
02118 }
02119 
02120 static const TileIndexDiffC _dock_tileoffs_chkaround[] = {
02121   {-1,  0},
02122   { 0,  0},
02123   { 0,  0},
02124   { 0, -1}
02125 };
02126 static const byte _dock_w_chk[4] = { 2, 1, 2, 1 };
02127 static const byte _dock_h_chk[4] = { 1, 2, 1, 2 };
02128 
02135 CommandCost CmdBuildDock(TileIndex tile, DoCommandFlag flags, uint32 p1, uint32 p2, const char *text)
02136 {
02137   StationID station_to_join = GB(p2, 16, 16);
02138   bool reuse = (station_to_join != NEW_STATION);
02139   if (!reuse) station_to_join = INVALID_STATION;
02140   bool distant_join = (station_to_join != INVALID_STATION);
02141 
02142   if (distant_join && (!_settings_game.station.distant_join_stations || !IsValidStationID(station_to_join))) return CMD_ERROR;
02143 
02144   DiagDirection direction = GetInclinedSlopeDirection(GetTileSlope(tile, NULL));
02145   if (direction == INVALID_DIAGDIR) return_cmd_error(STR_304B_SITE_UNSUITABLE);
02146   direction = ReverseDiagDir(direction);
02147 
02148   /* Docks cannot be placed on rapids */
02149   if (IsWaterTile(tile)) return_cmd_error(STR_304B_SITE_UNSUITABLE);
02150 
02151   if (!CheckIfAuthorityAllowsNewStation(tile, flags)) return CMD_ERROR;
02152 
02153   if (MayHaveBridgeAbove(tile) && IsBridgeAbove(tile)) return_cmd_error(STR_5007_MUST_DEMOLISH_BRIDGE_FIRST);
02154 
02155   if (CmdFailed(DoCommand(tile, 0, 0, flags, CMD_LANDSCAPE_CLEAR))) return CMD_ERROR;
02156 
02157   TileIndex tile_cur = tile + TileOffsByDiagDir(direction);
02158 
02159   if (!IsTileType(tile_cur, MP_WATER) || GetTileSlope(tile_cur, NULL) != SLOPE_FLAT) {
02160     return_cmd_error(STR_304B_SITE_UNSUITABLE);
02161   }
02162 
02163   if (MayHaveBridgeAbove(tile_cur) && IsBridgeAbove(tile_cur)) return_cmd_error(STR_5007_MUST_DEMOLISH_BRIDGE_FIRST);
02164 
02165   /* Get the water class of the water tile before it is cleared.*/
02166   WaterClass wc = GetWaterClass(tile_cur);
02167 
02168   if (CmdFailed(DoCommand(tile_cur, 0, 0, flags, CMD_LANDSCAPE_CLEAR))) return CMD_ERROR;
02169 
02170   tile_cur += TileOffsByDiagDir(direction);
02171   if (!IsTileType(tile_cur, MP_WATER) || GetTileSlope(tile_cur, NULL) != SLOPE_FLAT) {
02172     return_cmd_error(STR_304B_SITE_UNSUITABLE);
02173   }
02174 
02175   /* middle */
02176   Station *st = NULL;
02177 
02178   if (!_settings_game.station.adjacent_stations || !HasBit(p1, 0)) {
02179     st = GetStationAround(
02180         tile + ToTileIndexDiff(_dock_tileoffs_chkaround[direction]),
02181         _dock_w_chk[direction], _dock_h_chk[direction], INVALID_STATION);
02182     if (st == CHECK_STATIONS_ERR) return CMD_ERROR;
02183   }
02184 
02185   /* Distant join */
02186   if (st == NULL && distant_join) st = GetStation(station_to_join);
02187 
02188   /* Find a deleted station close to us */
02189   if (st == NULL && reuse) st = GetClosestDeletedStation(tile);
02190 
02191   if (st != NULL) {
02192     if (st->owner != _current_company) {
02193       return_cmd_error(STR_3009_TOO_CLOSE_TO_ANOTHER_STATION);
02194     }
02195 
02196     if (!st->rect.BeforeAddRect(
02197         tile + ToTileIndexDiff(_dock_tileoffs_chkaround[direction]),
02198         _dock_w_chk[direction], _dock_h_chk[direction], StationRect::ADD_TEST)) return CMD_ERROR;
02199 
02200     if (st->dock_tile != INVALID_TILE) return_cmd_error(STR_304C_TOO_CLOSE_TO_ANOTHER_DOCK);
02201   } else {
02202     /* allocate and initialize new station */
02203     if (!Station::CanAllocateItem()) return_cmd_error(STR_3008_TOO_MANY_STATIONS_LOADING);
02204 
02205     if (flags & DC_EXEC) {
02206       st = new Station(tile);
02207 
02208       st->town = ClosestTownFromTile(tile, UINT_MAX);
02209       st->string_id = GenerateStationName(st, tile, STATIONNAMING_DOCK);
02210 
02211       if (IsValidCompanyID(_current_company)) {
02212         SetBit(st->town->have_ratings, _current_company);
02213       }
02214     }
02215   }
02216 
02217   if (flags & DC_EXEC) {
02218     st->dock_tile = tile;
02219     st->AddFacility(FACIL_DOCK, tile);
02220 
02221     st->rect.BeforeAddRect(
02222         tile + ToTileIndexDiff(_dock_tileoffs_chkaround[direction]),
02223         _dock_w_chk[direction], _dock_h_chk[direction], StationRect::ADD_TRY);
02224 
02225     MakeDock(tile, st->owner, st->index, direction, wc);
02226 
02227     UpdateStationVirtCoordDirty(st);
02228     UpdateStationAcceptance(st, false);
02229     InvalidateWindowData(WC_SELECT_STATION, 0, 0);
02230     InvalidateWindowData(WC_STATION_LIST, st->owner, 0);
02231     InvalidateWindowWidget(WC_STATION_VIEW, st->index, SVW_SHIPS);
02232   }
02233 
02234   return CommandCost(EXPENSES_CONSTRUCTION, _price.build_dock);
02235 }
02236 
02237 static CommandCost RemoveDock(Station *st, DoCommandFlag flags)
02238 {
02239   if (!CheckOwnership(st->owner)) return CMD_ERROR;
02240 
02241   TileIndex tile1 = st->dock_tile;
02242   TileIndex tile2 = tile1 + TileOffsByDiagDir(GetDockDirection(tile1));
02243 
02244   if (!EnsureNoVehicleOnGround(tile1)) return CMD_ERROR;
02245   if (!EnsureNoVehicleOnGround(tile2)) return CMD_ERROR;
02246 
02247   if (flags & DC_EXEC) {
02248     DoClearSquare(tile1);
02249     MakeWaterKeepingClass(tile2, st->owner);
02250 
02251     st->rect.AfterRemoveTile(st, tile1);
02252     st->rect.AfterRemoveTile(st, tile2);
02253 
02254     MarkTileDirtyByTile(tile2);
02255 
02256     st->dock_tile = INVALID_TILE;
02257     st->facilities &= ~FACIL_DOCK;
02258 
02259     InvalidateWindowWidget(WC_STATION_VIEW, st->index, SVW_SHIPS);
02260     UpdateStationVirtCoordDirty(st);
02261     DeleteStationIfEmpty(st);
02262   }
02263 
02264   return CommandCost(EXPENSES_CONSTRUCTION, _price.remove_dock);
02265 }
02266 
02267 #include "table/station_land.h"
02268 
02269 const DrawTileSprites *GetStationTileLayout(StationType st, byte gfx)
02270 {
02271   return &_station_display_datas[st][gfx];
02272 }
02273 
02274 static void DrawTile_Station(TileInfo *ti)
02275 {
02276   const DrawTileSprites *t = NULL;
02277   RoadTypes roadtypes;
02278   int32 total_offset;
02279   int32 custom_ground_offset;
02280 
02281   if (IsRailwayStation(ti->tile)) {
02282     const RailtypeInfo *rti = GetRailTypeInfo(GetRailType(ti->tile));
02283     roadtypes = ROADTYPES_NONE;
02284     total_offset = rti->total_offset;
02285     custom_ground_offset = rti->custom_ground_offset;
02286   } else {
02287     roadtypes = IsRoadStop(ti->tile) ? GetRoadTypes(ti->tile) : ROADTYPES_NONE;
02288     total_offset = 0;
02289     custom_ground_offset = 0;
02290   }
02291   uint32 relocation = 0;
02292   const Station *st = NULL;
02293   const StationSpec *statspec = NULL;
02294   Owner owner = GetTileOwner(ti->tile);
02295 
02296   SpriteID palette;
02297   if (IsValidCompanyID(owner)) {
02298     palette = COMPANY_SPRITE_COLOUR(owner);
02299   } else {
02300     /* Some stations are not owner by a company, namely oil rigs */
02301     palette = PALETTE_TO_GREY;
02302   }
02303 
02304   /* don't show foundation for docks */
02305   if (ti->tileh != SLOPE_FLAT && !IsDock(ti->tile))
02306     DrawFoundation(ti, FOUNDATION_LEVELED);
02307 
02308   if (IsCustomStationSpecIndex(ti->tile)) {
02309     /* look for customization */
02310     st = GetStationByTile(ti->tile);
02311     statspec = st->speclist[GetCustomStationSpecIndex(ti->tile)].spec;
02312 
02313     if (statspec != NULL) {
02314       uint tile = GetStationGfx(ti->tile);
02315 
02316       relocation = GetCustomStationRelocation(statspec, st, ti->tile);
02317 
02318       if (HasBit(statspec->callbackmask, CBM_STATION_SPRITE_LAYOUT)) {
02319         uint16 callback = GetStationCallback(CBID_STATION_SPRITE_LAYOUT, 0, 0, statspec, st, ti->tile);
02320         if (callback != CALLBACK_FAILED) tile = (callback & ~1) + GetRailStationAxis(ti->tile);
02321       }
02322 
02323       /* Ensure the chosen tile layout is valid for this custom station */
02324       if (statspec->renderdata != NULL) {
02325         t = &statspec->renderdata[tile < statspec->tiles ? tile : (uint)GetRailStationAxis(ti->tile)];
02326       }
02327     }
02328   }
02329 
02330   if (t == NULL || t->seq == NULL) t = &_station_display_datas[GetStationType(ti->tile)][GetStationGfx(ti->tile)];
02331 
02332 
02333   if (IsBuoy(ti->tile) || IsDock(ti->tile) || (IsOilRig(ti->tile) && GetWaterClass(ti->tile) != WATER_CLASS_INVALID)) {
02334     if (ti->tileh == SLOPE_FLAT) {
02335       DrawWaterClassGround(ti);
02336     } else {
02337       assert(IsDock(ti->tile));
02338       TileIndex water_tile = ti->tile + TileOffsByDiagDir(GetDockDirection(ti->tile));
02339       WaterClass wc = GetWaterClass(water_tile);
02340       if (wc == WATER_CLASS_SEA) {
02341         DrawShoreTile(ti->tileh);
02342       } else {
02343         DrawClearLandTile(ti, 3);
02344       }
02345     }
02346   } else {
02347     SpriteID image = t->ground.sprite;
02348     SpriteID pal   = t->ground.pal;
02349     if (HasBit(image, SPRITE_MODIFIER_USE_OFFSET)) {
02350       image += GetCustomStationGroundRelocation(statspec, st, ti->tile);
02351       image += custom_ground_offset;
02352     } else {
02353       image += total_offset;
02354     }
02355     DrawGroundSprite(image, GroundSpritePaletteTransform(image, pal, palette));
02356 
02357     /* PBS debugging, draw reserved tracks darker */
02358     if (_game_mode != GM_MENU && _settings_client.gui.show_track_reservation && IsRailwayStation(ti->tile) && GetRailwayStationReservation(ti->tile)) {
02359       const RailtypeInfo *rti = GetRailTypeInfo(GetRailType(ti->tile));
02360       DrawGroundSprite(GetRailStationAxis(ti->tile) == AXIS_X ? rti->base_sprites.single_y : rti->base_sprites.single_x, PALETTE_CRASH);
02361     }
02362   }
02363 
02364   if (IsRailwayStation(ti->tile) && HasCatenaryDrawn(GetRailType(ti->tile)) && IsStationTileElectrifiable(ti->tile)) DrawCatenary(ti);
02365 
02366   if (HasBit(roadtypes, ROADTYPE_TRAM)) {
02367     Axis axis = GetRoadStopDir(ti->tile) == DIAGDIR_NE ? AXIS_X : AXIS_Y;
02368     DrawGroundSprite((HasBit(roadtypes, ROADTYPE_ROAD) ? SPR_TRAMWAY_OVERLAY : SPR_TRAMWAY_TRAM) + (axis ^ 1), PAL_NONE);
02369     DrawTramCatenary(ti, axis == AXIS_X ? ROAD_X : ROAD_Y);
02370   }
02371 
02372   const DrawTileSeqStruct *dtss;
02373   foreach_draw_tile_seq(dtss, t->seq) {
02374     SpriteID image = dtss->image.sprite;
02375 
02376     /* Stop drawing sprite sequence once we meet a sprite that doesn't have to be opaque */
02377     if (IsInvisibilitySet(TO_BUILDINGS) && !HasBit(image, SPRITE_MODIFIER_OPAQUE)) return;
02378 
02379     if (relocation == 0 || HasBit(image, SPRITE_MODIFIER_USE_OFFSET)) {
02380       image += total_offset;
02381     } else {
02382       image += relocation;
02383     }
02384 
02385     SpriteID pal = SpriteLayoutPaletteTransform(image, dtss->image.pal, palette);
02386 
02387     if ((byte)dtss->delta_z != 0x80) {
02388       AddSortableSpriteToDraw(
02389         image, pal,
02390         ti->x + dtss->delta_x, ti->y + dtss->delta_y,
02391         dtss->size_x, dtss->size_y,
02392         dtss->size_z, ti->z + dtss->delta_z,
02393         !HasBit(image, SPRITE_MODIFIER_OPAQUE) && IsTransparencySet(TO_BUILDINGS)
02394       );
02395     } else {
02396       /* For stations and original spritelayouts delta_x and delta_y are signed */
02397       AddChildSpriteScreen(image, pal, dtss->delta_x, dtss->delta_y, !HasBit(image, SPRITE_MODIFIER_OPAQUE) && IsTransparencySet(TO_BUILDINGS));
02398     }
02399   }
02400 }
02401 
02402 void StationPickerDrawSprite(int x, int y, StationType st, RailType railtype, RoadType roadtype, int image)
02403 {
02404   int32 total_offset = 0;
02405   SpriteID pal = COMPANY_SPRITE_COLOUR(_local_company);
02406   const DrawTileSprites *t = &_station_display_datas[st][image];
02407 
02408   if (railtype != INVALID_RAILTYPE) {
02409     const RailtypeInfo *rti = GetRailTypeInfo(railtype);
02410     total_offset = rti->total_offset;
02411   }
02412 
02413   SpriteID img = t->ground.sprite;
02414   DrawSprite(img + total_offset, HasBit(img, PALETTE_MODIFIER_COLOUR) ? pal : PAL_NONE, x, y);
02415 
02416   if (roadtype == ROADTYPE_TRAM) {
02417     DrawSprite(SPR_TRAMWAY_TRAM + (t->ground.sprite == SPR_ROAD_PAVED_STRAIGHT_X ? 1 : 0), PAL_NONE, x, y);
02418   }
02419 
02420   const DrawTileSeqStruct *dtss;
02421   foreach_draw_tile_seq(dtss, t->seq) {
02422     Point pt = RemapCoords(dtss->delta_x, dtss->delta_y, dtss->delta_z);
02423     DrawSprite(dtss->image.sprite + total_offset, pal, x + pt.x, y + pt.y);
02424   }
02425 }
02426 
02427 static uint GetSlopeZ_Station(TileIndex tile, uint x, uint y)
02428 {
02429   return GetTileMaxZ(tile);
02430 }
02431 
02432 static Foundation GetFoundation_Station(TileIndex tile, Slope tileh)
02433 {
02434   return FlatteningFoundation(tileh);
02435 }
02436 
02437 static void GetAcceptedCargo_Station(TileIndex tile, AcceptedCargo ac)
02438 {
02439   /* not used */
02440 }
02441 
02442 static void GetTileDesc_Station(TileIndex tile, TileDesc *td)
02443 {
02444   td->owner[0] = GetTileOwner(tile);
02445   if (IsDriveThroughStopTile(tile)) {
02446     Owner road_owner = INVALID_OWNER;
02447     Owner tram_owner = INVALID_OWNER;
02448     RoadTypes rts = GetRoadTypes(tile);
02449     if (HasBit(rts, ROADTYPE_ROAD)) road_owner = GetRoadOwner(tile, ROADTYPE_ROAD);
02450     if (HasBit(rts, ROADTYPE_TRAM)) tram_owner = GetRoadOwner(tile, ROADTYPE_TRAM);
02451 
02452     /* Is there a mix of owners? */
02453     if ((tram_owner != INVALID_OWNER && tram_owner != td->owner[0]) ||
02454         (road_owner != INVALID_OWNER && road_owner != td->owner[0])) {
02455       uint i = 1;
02456       if (road_owner != INVALID_OWNER) {
02457         td->owner_type[i] = STR_ROAD_OWNER;
02458         td->owner[i] = road_owner;
02459         i++;
02460       }
02461       if (tram_owner != INVALID_OWNER) {
02462         td->owner_type[i] = STR_TRAM_OWNER;
02463         td->owner[i] = tram_owner;
02464       }
02465     }
02466   }
02467   td->build_date = GetStationByTile(tile)->build_date;
02468 
02469   const StationSpec *spec = GetStationSpec(tile);
02470 
02471   if (spec != NULL) {
02472     td->station_class = GetStationClassName(spec->sclass);
02473     td->station_name = spec->name;
02474 
02475     if (spec->grffile != NULL) {
02476       const GRFConfig *gc = GetGRFConfig(spec->grffile->grfid);
02477       td->grf = gc->name;
02478     }
02479   }
02480 
02481   StringID str;
02482   switch (GetStationType(tile)) {
02483     default: NOT_REACHED();
02484     case STATION_RAIL:    str = STR_305E_RAILROAD_STATION; break;
02485     case STATION_AIRPORT:
02486       str = (IsHangar(tile) ? STR_305F_AIRCRAFT_HANGAR : STR_3060_AIRPORT);
02487       break;
02488     case STATION_TRUCK:   str = STR_3061_TRUCK_LOADING_AREA; break;
02489     case STATION_BUS:     str = STR_3062_BUS_STATION; break;
02490     case STATION_OILRIG:  str = STR_4807_OIL_RIG; break;
02491     case STATION_DOCK:    str = STR_3063_SHIP_DOCK; break;
02492     case STATION_BUOY:    str = STR_3069_BUOY; break;
02493   }
02494   td->str = str;
02495 }
02496 
02497 
02498 static TrackStatus GetTileTrackStatus_Station(TileIndex tile, TransportType mode, uint sub_mode, DiagDirection side)
02499 {
02500   TrackBits trackbits = TRACK_BIT_NONE;
02501 
02502   switch (mode) {
02503     case TRANSPORT_RAIL:
02504       if (IsRailwayStation(tile) && !IsStationTileBlocked(tile)) {
02505         trackbits = TrackToTrackBits(GetRailStationTrack(tile));
02506       }
02507       break;
02508 
02509     case TRANSPORT_WATER:
02510       /* buoy is coded as a station, it is always on open water */
02511       if (IsBuoy(tile)) {
02512         trackbits = TRACK_BIT_ALL;
02513         /* remove tracks that connect NE map edge */
02514         if (TileX(tile) == 0) trackbits &= ~(TRACK_BIT_X | TRACK_BIT_UPPER | TRACK_BIT_RIGHT);
02515         /* remove tracks that connect NW map edge */
02516         if (TileY(tile) == 0) trackbits &= ~(TRACK_BIT_Y | TRACK_BIT_LEFT | TRACK_BIT_UPPER);
02517       }
02518       break;
02519 
02520     case TRANSPORT_ROAD:
02521       if ((GetRoadTypes(tile) & sub_mode) != 0 && IsRoadStop(tile)) {
02522         DiagDirection dir = GetRoadStopDir(tile);
02523         Axis axis = DiagDirToAxis(dir);
02524 
02525         if (side != INVALID_DIAGDIR) {
02526           if (axis != DiagDirToAxis(side) || (IsStandardRoadStopTile(tile) && dir != side)) break;
02527         }
02528 
02529         trackbits = AxisToTrackBits(axis);
02530       }
02531       break;
02532 
02533     default:
02534       break;
02535   }
02536 
02537   return CombineTrackStatus(TrackBitsToTrackdirBits(trackbits), TRACKDIR_BIT_NONE);
02538 }
02539 
02540 
02541 static void TileLoop_Station(TileIndex tile)
02542 {
02543   /* FIXME -- GetTileTrackStatus_Station -> animated stationtiles
02544    * hardcoded.....not good */
02545   switch (GetStationType(tile)) {
02546     case STATION_AIRPORT:
02547       switch (GetStationGfx(tile)) {
02548         case GFX_RADAR_LARGE_FIRST:
02549         case GFX_WINDSACK_FIRST : // for small airport
02550         case GFX_RADAR_INTERNATIONAL_FIRST:
02551         case GFX_RADAR_METROPOLITAN_FIRST:
02552         case GFX_RADAR_DISTRICTWE_FIRST: // radar district W-E airport
02553         case GFX_WINDSACK_INTERCON_FIRST : // for intercontinental airport
02554           AddAnimatedTile(tile);
02555           break;
02556       }
02557       break;
02558 
02559     case STATION_DOCK:
02560       if (GetTileSlope(tile, NULL) != SLOPE_FLAT) break; // only handle water part
02561     /* FALL THROUGH */
02562     case STATION_OILRIG: //(station part)
02563     case STATION_BUOY:
02564       TileLoop_Water(tile);
02565       break;
02566 
02567     default: break;
02568   }
02569 }
02570 
02571 
02572 static void AnimateTile_Station(TileIndex tile)
02573 {
02574   struct AnimData {
02575     StationGfx from; // first sprite
02576     StationGfx to;   // last sprite
02577     byte delay;
02578   };
02579 
02580   static const AnimData data[] = {
02581     { GFX_RADAR_LARGE_FIRST,         GFX_RADAR_LARGE_LAST,         3 },
02582     { GFX_WINDSACK_FIRST,            GFX_WINDSACK_LAST,            1 },
02583     { GFX_RADAR_INTERNATIONAL_FIRST, GFX_RADAR_INTERNATIONAL_LAST, 3 },
02584     { GFX_RADAR_METROPOLITAN_FIRST,  GFX_RADAR_METROPOLITAN_LAST,  3 },
02585     { GFX_RADAR_DISTRICTWE_FIRST,    GFX_RADAR_DISTRICTWE_LAST,    3 },
02586     { GFX_WINDSACK_INTERCON_FIRST,   GFX_WINDSACK_INTERCON_LAST,   1 }
02587   };
02588 
02589   if (IsRailwayStation(tile)) {
02590     AnimateStationTile(tile);
02591     return;
02592   }
02593 
02594   StationGfx gfx = GetStationGfx(tile);
02595 
02596   for (const AnimData *i = data; i != endof(data); i++) {
02597     if (i->from <= gfx && gfx <= i->to) {
02598       if ((_tick_counter & i->delay) == 0) {
02599         SetStationGfx(tile, gfx < i->to ? gfx + 1 : i->from);
02600         MarkTileDirtyByTile(tile);
02601       }
02602       break;
02603     }
02604   }
02605 }
02606 
02607 
02608 static bool ClickTile_Station(TileIndex tile)
02609 {
02610   if (IsHangar(tile)) {
02611     ShowDepotWindow(tile, VEH_AIRCRAFT);
02612   } else {
02613     ShowStationViewWindow(GetStationIndex(tile));
02614   }
02615   return true;
02616 }
02617 
02618 static VehicleEnterTileStatus VehicleEnter_Station(Vehicle *v, TileIndex tile, int x, int y)
02619 {
02620   StationID station_id = GetStationIndex(tile);
02621 
02622   if (v->type == VEH_TRAIN) {
02623     if (!v->current_order.ShouldStopAtStation(v, station_id)) return VETSB_CONTINUE;
02624     if (IsRailwayStation(tile) && IsFrontEngine(v) &&
02625         !IsCompatibleTrainStationTile(tile + TileOffsByDiagDir(DirToDiagDir(v->direction)), tile)) {
02626       DiagDirection dir = DirToDiagDir(v->direction);
02627 
02628       x &= 0xF;
02629       y &= 0xF;
02630 
02631       if (DiagDirToAxis(dir) != AXIS_X) Swap(x, y);
02632       if (y == TILE_SIZE / 2) {
02633         if (dir != DIAGDIR_SE && dir != DIAGDIR_SW) x = TILE_SIZE - 1 - x;
02634         int stop = TILE_SIZE - (v->u.rail.cached_veh_length + 1) / 2;
02635         if (x == stop) return VETSB_ENTERED_STATION | (VehicleEnterTileStatus)(station_id << VETS_STATION_ID_OFFSET); // enter station
02636         if (x < stop) {
02637           uint16 spd;
02638 
02639           v->vehstatus |= VS_TRAIN_SLOWING;
02640           spd = max(0, (stop - x) * 20 - 15);
02641           if (spd < v->cur_speed) v->cur_speed = spd;
02642         }
02643       }
02644     }
02645   } else if (v->type == VEH_ROAD) {
02646     if (v->u.road.state < RVSB_IN_ROAD_STOP && !IsReversingRoadTrackdir((Trackdir)v->u.road.state) && v->u.road.frame == 0) {
02647       if (IsRoadStop(tile) && IsRoadVehFront(v)) {
02648         /* Attempt to allocate a parking bay in a road stop */
02649         RoadStop *rs = GetRoadStopByTile(tile, GetRoadStopType(tile));
02650 
02651         if (IsDriveThroughStopTile(tile)) {
02652           if (!v->current_order.ShouldStopAtStation(v, station_id)) return VETSB_CONTINUE;
02653 
02654           /* Vehicles entering a drive-through stop from the 'normal' side use first bay (bay 0). */
02655           byte side = ((DirToDiagDir(v->direction) == ReverseDiagDir(GetRoadStopDir(tile))) == (v->u.road.overtaking == 0)) ? 0 : 1;
02656 
02657           if (!rs->IsFreeBay(side)) return VETSB_CANNOT_ENTER;
02658 
02659           /* Check if the vehicle is stopping at this road stop */
02660           if (GetRoadStopType(tile) == (IsCargoInClass(v->cargo_type, CC_PASSENGERS) ? ROADSTOP_BUS : ROADSTOP_TRUCK) &&
02661               v->current_order.GetDestination() == GetStationIndex(tile)) {
02662             SetBit(v->u.road.state, RVS_IS_STOPPING);
02663             rs->AllocateDriveThroughBay(side);
02664           }
02665 
02666           /* Indicate if vehicle is using second bay. */
02667           if (side == 1) SetBit(v->u.road.state, RVS_USING_SECOND_BAY);
02668           /* Indicate a drive-through stop */
02669           SetBit(v->u.road.state, RVS_IN_DT_ROAD_STOP);
02670           return VETSB_CONTINUE;
02671         }
02672 
02673         /* For normal (non drive-through) road stops
02674          * Check if station is busy or if there are no free bays or whether it is a articulated vehicle. */
02675         if (rs->IsEntranceBusy() || !rs->HasFreeBay() || RoadVehHasArticPart(v)) return VETSB_CANNOT_ENTER;
02676 
02677         SetBit(v->u.road.state, RVS_IN_ROAD_STOP);
02678 
02679         /* Allocate a bay and update the road state */
02680         uint bay_nr = rs->AllocateBay();
02681         SB(v->u.road.state, RVS_USING_SECOND_BAY, 1, bay_nr);
02682 
02683         /* Mark the station entrace as busy */
02684         rs->SetEntranceBusy(true);
02685       }
02686     }
02687   }
02688 
02689   return VETSB_CONTINUE;
02690 }
02691 
02697 static void StationHandleBigTick(Station *st)
02698 {
02699   UpdateStationAcceptance(st, true);
02700 
02701   if (st->facilities == 0 && ++st->delete_ctr >= 8) delete st;
02702 
02703 }
02704 
02705 static inline void byte_inc_sat(byte *p)
02706 {
02707   byte b = *p + 1;
02708   if (b != 0) *p = b;
02709 }
02710 
02711 static void UpdateStationRating(Station *st)
02712 {
02713   bool waiting_changed = false;
02714 
02715   byte_inc_sat(&st->time_since_load);
02716   byte_inc_sat(&st->time_since_unload);
02717 
02718   GoodsEntry *ge = st->goods;
02719   do {
02720     /* Slowly increase the rating back to his original level in the case we
02721      *  didn't deliver cargo yet to this station. This happens when a bribe
02722      *  failed while you didn't moved that cargo yet to a station. */
02723     if (!HasBit(ge->acceptance_pickup, GoodsEntry::PICKUP) && ge->rating < INITIAL_STATION_RATING) {
02724       ge->rating++;
02725     }
02726 
02727     /* Only change the rating if we are moving this cargo */
02728     if (HasBit(ge->acceptance_pickup, GoodsEntry::PICKUP)) {
02729       byte_inc_sat(&ge->days_since_pickup);
02730 
02731       int rating = 0;
02732 
02733       {
02734         int b = ge->last_speed - 85;
02735         if (b >= 0)
02736           rating += b >> 2;
02737       }
02738 
02739       {
02740         byte age = ge->last_age;
02741         (age >= 3) ||
02742         (rating += 10, age >= 2) ||
02743         (rating += 10, age >= 1) ||
02744         (rating += 13, true);
02745       }
02746 
02747       if (IsValidCompanyID(st->owner) && HasBit(st->town->statues, st->owner)) rating += 26;
02748 
02749       {
02750         byte days = ge->days_since_pickup;
02751         if (st->last_vehicle_type == VEH_SHIP) days >>= 2;
02752         (days > 21) ||
02753         (rating += 25, days > 12) ||
02754         (rating += 25, days > 6) ||
02755         (rating += 45, days > 3) ||
02756         (rating += 35, true);
02757       }
02758 
02759       uint waiting = ge->cargo.Count();
02760       (rating -= 90, waiting > 1500) ||
02761       (rating += 55, waiting > 1000) ||
02762       (rating += 35, waiting > 600) ||
02763       (rating += 10, waiting > 300) ||
02764       (rating += 20, waiting > 100) ||
02765       (rating += 10, true);
02766 
02767       {
02768         int or_ = ge->rating; // old rating
02769 
02770         /* only modify rating in steps of -2, -1, 0, 1 or 2 */
02771         ge->rating = rating = or_ + Clamp(Clamp(rating, 0, 255) - or_, -2, 2);
02772 
02773         /* if rating is <= 64 and more than 200 items waiting,
02774          * remove some random amount of goods from the station */
02775         if (rating <= 64 && waiting >= 200) {
02776           int dec = Random() & 0x1F;
02777           if (waiting < 400) dec &= 7;
02778           waiting -= dec + 1;
02779           waiting_changed = true;
02780         }
02781 
02782         /* if rating is <= 127 and there are any items waiting, maybe remove some goods. */
02783         if (rating <= 127 && waiting != 0) {
02784           uint32 r = Random();
02785           if (rating <= (int)GB(r, 0, 7)) {
02786             /* Need to have int, otherwise it will just overflow etc. */
02787             waiting = max((int)waiting - (int)GB(r, 8, 2) - 1, 0);
02788             waiting_changed = true;
02789           }
02790         }
02791 
02792         /* At some point we really must cap the cargo. Previously this
02793          * was a strict 4095, but now we'll have a less strict, but
02794          * increasingly agressive truncation of the amount of cargo. */
02795         static const uint WAITING_CARGO_THRESHOLD  = 1 << 12;
02796         static const uint WAITING_CARGO_CUT_FACTOR = 1 <<  6;
02797         static const uint MAX_WAITING_CARGO        = 1 << 15;
02798 
02799         if (waiting > WAITING_CARGO_THRESHOLD) {
02800           uint difference = waiting - WAITING_CARGO_THRESHOLD;
02801           waiting -= (difference / WAITING_CARGO_CUT_FACTOR);
02802 
02803           waiting = min(waiting, MAX_WAITING_CARGO);
02804           waiting_changed = true;
02805         }
02806 
02807         if (waiting_changed) ge->cargo.Truncate(waiting);
02808       }
02809     }
02810   } while (++ge != endof(st->goods));
02811 
02812   StationID index = st->index;
02813   if (waiting_changed) {
02814     InvalidateWindow(WC_STATION_VIEW, index); // update whole window
02815   } else {
02816     InvalidateWindowWidget(WC_STATION_VIEW, index, SVW_RATINGLIST); // update only ratings list
02817   }
02818 }
02819 
02820 /* called for every station each tick */
02821 static void StationHandleSmallTick(Station *st)
02822 {
02823   if (st->facilities == 0) return;
02824 
02825   byte b = st->delete_ctr + 1;
02826   if (b >= 185) b = 0;
02827   st->delete_ctr = b;
02828 
02829   if (b == 0) UpdateStationRating(st);
02830 }
02831 
02832 void OnTick_Station()
02833 {
02834   if (_game_mode == GM_EDITOR) return;
02835 
02836   Station *st;
02837   FOR_ALL_STATIONS(st) {
02838     StationHandleSmallTick(st);
02839 
02840     /* Run 250 tick interval trigger for station animation.
02841      * Station index is included so that triggers are not all done
02842      * at the same time. */
02843     if ((_tick_counter + st->index) % 250 == 0) {
02844       StationHandleBigTick(st);
02845       StationAnimationTrigger(st, st->xy, STAT_ANIM_250_TICKS);
02846     }
02847   }
02848 }
02849 
02850 void StationMonthlyLoop()
02851 {
02852   /* not used */
02853 }
02854 
02855 
02856 void ModifyStationRatingAround(TileIndex tile, Owner owner, int amount, uint radius)
02857 {
02858   Station *st;
02859 
02860   FOR_ALL_STATIONS(st) {
02861     if (st->owner == owner &&
02862         DistanceManhattan(tile, st->xy) <= radius) {
02863       for (CargoID i = 0; i < NUM_CARGO; i++) {
02864         GoodsEntry *ge = &st->goods[i];
02865 
02866         if (ge->acceptance_pickup != 0) {
02867           ge->rating = Clamp(ge->rating + amount, 0, 255);
02868         }
02869       }
02870     }
02871   }
02872 }
02873 
02874 static void UpdateStationWaiting(Station *st, CargoID type, uint amount)
02875 {
02876   st->goods[type].cargo.Append(new CargoPacket(st->index, amount));
02877   SetBit(st->goods[type].acceptance_pickup, GoodsEntry::PICKUP);
02878 
02879   StationAnimationTrigger(st, st->xy, STAT_ANIM_NEW_CARGO, type);
02880 
02881   InvalidateWindow(WC_STATION_VIEW, st->index);
02882   st->MarkTilesDirty(true);
02883 }
02884 
02885 static bool IsUniqueStationName(const char *name)
02886 {
02887   const Station *st;
02888 
02889   FOR_ALL_STATIONS(st) {
02890     if (st->name != NULL && strcmp(st->name, name) == 0) return false;
02891   }
02892 
02893   return true;
02894 }
02895 
02902 CommandCost CmdRenameStation(TileIndex tile, DoCommandFlag flags, uint32 p1, uint32 p2, const char *text)
02903 {
02904   if (!IsValidStationID(p1)) return CMD_ERROR;
02905 
02906   Station *st = GetStation(p1);
02907   if (!CheckOwnership(st->owner)) return CMD_ERROR;
02908 
02909   bool reset = StrEmpty(text);
02910 
02911   if (!reset) {
02912     if (strlen(text) >= MAX_LENGTH_STATION_NAME_BYTES) return CMD_ERROR;
02913     if (!IsUniqueStationName(text)) return_cmd_error(STR_NAME_MUST_BE_UNIQUE);
02914   }
02915 
02916   if (flags & DC_EXEC) {
02917     free(st->name);
02918     st->name = reset ? NULL : strdup(text);
02919 
02920     UpdateStationVirtCoord(st);
02921     InvalidateWindowData(WC_STATION_LIST, st->owner, 1);
02922     MarkWholeScreenDirty();
02923   }
02924 
02925   return CommandCost();
02926 }
02927 
02937 void FindStationsAroundTiles(TileIndex tile, int w_prod, int h_prod, StationList *stations)
02938 {
02939   /* area to search = producer plus station catchment radius */
02940   int max_rad = (_settings_game.station.modified_catchment ? MAX_CATCHMENT : CA_UNMODIFIED);
02941 
02942   for (int dy = -max_rad; dy < h_prod + max_rad; dy++) {
02943     for (int dx = -max_rad; dx < w_prod + max_rad; dx++) {
02944       TileIndex cur_tile = TileAddWrap(tile, dx, dy);
02945       if (cur_tile == INVALID_TILE || !IsTileType(cur_tile, MP_STATION)) continue;
02946 
02947       Station *st = GetStationByTile(cur_tile);
02948 
02949       if (st->IsBuoy()) continue; // bouys don't accept cargo
02950 
02951       if (_settings_game.station.modified_catchment) {
02952         int rad = st->GetCatchmentRadius();
02953         if (dx < -rad || dx >= rad + w_prod || dy < -rad || dy >= rad + h_prod) continue;
02954       }
02955 
02956       /* Insert the station in the set. This will fail if it has
02957        * already been added.
02958        */
02959       stations->Include(st);
02960     }
02961   }
02962 }
02963 
02964 uint MoveGoodsToStation(TileIndex tile, int w, int h, CargoID type, uint amount)
02965 {
02966   /* Return if nothing to do. Also the rounding below fails for 0. */
02967   if (amount == 0) return 0;
02968 
02969   Station *st1 = NULL;   // Station with best rating
02970   Station *st2 = NULL;   // Second best station
02971   uint best_rating1 = 0; // rating of st1
02972   uint best_rating2 = 0; // rating of st2
02973 
02974   StationList all_stations;
02975   FindStationsAroundTiles(tile, w, h, &all_stations);
02976   for (Station **st_iter = all_stations.Begin(); st_iter != all_stations.End(); ++st_iter) {
02977     Station *st = *st_iter;
02978 
02979     /* Is the station reserved exclusively for somebody else? */
02980     if (st->town->exclusive_counter > 0 && st->town->exclusivity != st->owner) continue;
02981 
02982     if (st->goods[type].rating == 0) continue; // Lowest possible rating, better not to give cargo anymore
02983 
02984     if (_settings_game.order.selectgoods && st->goods[type].last_speed == 0) continue; // Selectively servicing stations, and not this one
02985 
02986     if (IsCargoInClass(type, CC_PASSENGERS)) {
02987       if (st->facilities == FACIL_TRUCK_STOP) continue; // passengers are never served by just a truck stop
02988     } else {
02989       if (st->facilities == FACIL_BUS_STOP) continue; // non-passengers are never served by just a bus stop
02990     }
02991 
02992     /* This station can be used, add it to st1/st2 */
02993     if (st1 == NULL || st->goods[type].rating >= best_rating1) {
02994       st2 = st1; best_rating2 = best_rating1; st1 = st; best_rating1 = st->goods[type].rating;
02995     } else if (st2 == NULL || st->goods[type].rating >= best_rating2) {
02996       st2 = st; best_rating2 = st->goods[type].rating;
02997     }
02998   }
02999 
03000   /* no stations around at all? */
03001   if (st1 == NULL) return 0;
03002 
03003   if (st2 == NULL) {
03004     /* only one station around */
03005     uint moved = amount * best_rating1 / 256 + 1;
03006     UpdateStationWaiting(st1, type, moved);
03007     return moved;
03008   }
03009 
03010   /* several stations around, the best two (highest rating) are in st1 and st2 */
03011   assert(st1 != NULL);
03012   assert(st2 != NULL);
03013   assert(best_rating1 != 0 || best_rating2 != 0);
03014 
03015   /* the 2nd highest one gets a penalty */
03016   best_rating2 >>= 1;
03017 
03018   /* amount given to station 1 */
03019   uint t = (best_rating1 * (amount + 1)) / (best_rating1 + best_rating2);
03020 
03021   uint moved = 0;
03022   if (t != 0) {
03023     moved = t * best_rating1 / 256 + 1;
03024     amount -= t;
03025     UpdateStationWaiting(st1, type, moved);
03026   }
03027 
03028   if (amount != 0) {
03029     amount = amount * best_rating2 / 256 + 1;
03030     moved += amount;
03031     UpdateStationWaiting(st2, type, amount);
03032   }
03033 
03034   return moved;
03035 }
03036 
03037 void BuildOilRig(TileIndex tile)
03038 {
03039   if (!Station::CanAllocateItem()) {
03040     DEBUG(misc, 0, "Can't allocate station for oilrig at 0x%X, reverting to oilrig only", tile);
03041     return;
03042   }
03043 
03044   Station *st = new Station(tile);
03045   st->town = ClosestTownFromTile(tile, UINT_MAX);
03046   st->sign.width_1 = 0;
03047 
03048   st->string_id = GenerateStationName(st, tile, STATIONNAMING_OILRIG);
03049 
03050   assert(IsTileType(tile, MP_INDUSTRY));
03051   MakeOilrig(tile, st->index, GetWaterClass(tile));
03052 
03053   st->owner = OWNER_NONE;
03054   st->airport_flags = 0;
03055   st->airport_type = AT_OILRIG;
03056   st->xy = tile;
03057   st->bus_stops = NULL;
03058   st->truck_stops = NULL;
03059   st->airport_tile = tile;
03060   st->dock_tile = tile;
03061   st->train_tile = INVALID_TILE;
03062   st->had_vehicle_of_type = 0;
03063   st->time_since_load = 255;
03064   st->time_since_unload = 255;
03065   st->delete_ctr = 0;
03066   st->last_vehicle_type = VEH_INVALID;
03067   st->facilities = FACIL_AIRPORT | FACIL_DOCK;
03068   st->build_date = _date;
03069 
03070   st->rect.BeforeAddTile(tile, StationRect::ADD_FORCE);
03071 
03072   for (CargoID j = 0; j < NUM_CARGO; j++) {
03073     st->goods[j].acceptance_pickup = 0;
03074     st->goods[j].days_since_pickup = 255;
03075     st->goods[j].rating = INITIAL_STATION_RATING;
03076     st->goods[j].last_speed = 0;
03077     st->goods[j].last_age = 255;
03078   }
03079 
03080   UpdateStationVirtCoordDirty(st);
03081   UpdateStationAcceptance(st, false);
03082 }
03083 
03084 void DeleteOilRig(TileIndex tile)
03085 {
03086   Station *st = GetStationByTile(tile);
03087 
03088   MakeWaterKeepingClass(tile, OWNER_NONE);
03089   MarkTileDirtyByTile(tile);
03090 
03091   st->dock_tile = INVALID_TILE;
03092   st->airport_tile = INVALID_TILE;
03093   st->facilities &= ~(FACIL_AIRPORT | FACIL_DOCK);
03094   st->airport_flags = 0;
03095 
03096   st->rect.AfterRemoveTile(st, tile);
03097 
03098   UpdateStationVirtCoordDirty(st);
03099   if (st->facilities == 0) delete st;
03100 }
03101 
03102 static void ChangeTileOwner_Station(TileIndex tile, Owner old_owner, Owner new_owner)
03103 {
03104   if (IsDriveThroughStopTile(tile)) {
03105     for (RoadType rt = ROADTYPE_ROAD; rt < ROADTYPE_END; rt++) {
03106       /* Update all roadtypes, no matter if they are present */
03107       if (GetRoadOwner(tile, rt) == old_owner) {
03108         SetRoadOwner(tile, rt, new_owner == INVALID_OWNER ? OWNER_NONE : new_owner);
03109       }
03110     }
03111   }
03112 
03113   if (!IsTileOwner(tile, old_owner)) return;
03114 
03115   if (new_owner != INVALID_OWNER) {
03116     /* for buoys, owner of tile is owner of water, st->owner == OWNER_NONE */
03117     SetTileOwner(tile, new_owner);
03118     InvalidateWindowClassesData(WC_STATION_LIST, 0);
03119   } else {
03120     if (IsDriveThroughStopTile(tile)) {
03121       /* Remove the drive-through road stop */
03122       DoCommand(tile, 0, (GetStationType(tile) == STATION_TRUCK) ? ROADSTOP_TRUCK : ROADSTOP_BUS, DC_EXEC | DC_BANKRUPT, CMD_REMOVE_ROAD_STOP);
03123       assert(IsTileType(tile, MP_ROAD));
03124       /* Change owner of tile and all roadtypes */
03125       ChangeTileOwner(tile, old_owner, new_owner);
03126     } else {
03127       DoCommand(tile, 0, 0, DC_EXEC | DC_BANKRUPT, CMD_LANDSCAPE_CLEAR);
03128       /* Set tile owner of water under (now removed) buoy and dock to OWNER_NONE.
03129        * Update owner of buoy if it was not removed (was in orders).
03130        * Do not update when owned by OWNER_WATER (sea and rivers). */
03131       if ((IsTileType(tile, MP_WATER) || IsBuoyTile(tile)) && IsTileOwner(tile, old_owner)) SetTileOwner(tile, OWNER_NONE);
03132     }
03133   }
03134 }
03135 
03144 static bool CanRemoveRoadWithStop(TileIndex tile, DoCommandFlag flags)
03145 {
03146   Owner road_owner = _current_company;
03147   Owner tram_owner = _current_company;
03148 
03149   RoadTypes rts = GetRoadTypes(tile);
03150   if (HasBit(rts, ROADTYPE_ROAD)) road_owner = GetRoadOwner(tile, ROADTYPE_ROAD);
03151   if (HasBit(rts, ROADTYPE_TRAM)) tram_owner = GetRoadOwner(tile, ROADTYPE_TRAM);
03152 
03153   if ((road_owner != OWNER_TOWN && !CheckOwnership(road_owner)) || !CheckOwnership(tram_owner)) return false;
03154 
03155   return road_owner != OWNER_TOWN || CheckAllowRemoveRoad(tile, GetAnyRoadBits(tile, ROADTYPE_ROAD), OWNER_TOWN, ROADTYPE_ROAD, flags);
03156 }
03157 
03158 static CommandCost ClearTile_Station(TileIndex tile, DoCommandFlag flags)
03159 {
03160   if (flags & DC_AUTO) {
03161     switch (GetStationType(tile)) {
03162       case STATION_RAIL:    return_cmd_error(STR_300B_MUST_DEMOLISH_RAILROAD);
03163       case STATION_AIRPORT: return_cmd_error(STR_300E_MUST_DEMOLISH_AIRPORT_FIRST);
03164       case STATION_TRUCK:   return_cmd_error(HasTileRoadType(tile, ROADTYPE_TRAM) ? STR_MUST_DEMOLISH_CARGO_TRAM_STATION : STR_3047_MUST_DEMOLISH_TRUCK_STATION);
03165       case STATION_BUS:     return_cmd_error(HasTileRoadType(tile, ROADTYPE_TRAM) ? STR_MUST_DEMOLISH_PASSENGER_TRAM_STATION : STR_3046_MUST_DEMOLISH_BUS_STATION);
03166       case STATION_BUOY:    return_cmd_error(STR_306A_BUOY_IN_THE_WAY);
03167       case STATION_DOCK:    return_cmd_error(STR_304D_MUST_DEMOLISH_DOCK_FIRST);
03168       case STATION_OILRIG:
03169         SetDParam(0, STR_4807_OIL_RIG);
03170         return_cmd_error(STR_4800_IN_THE_WAY);
03171     }
03172   }
03173 
03174   Station *st = GetStationByTile(tile);
03175 
03176   switch (GetStationType(tile)) {
03177     case STATION_RAIL:    return RemoveRailroadStation(st, tile, flags);
03178     case STATION_AIRPORT: return RemoveAirport(st, flags);
03179     case STATION_TRUCK:
03180       if (IsDriveThroughStopTile(tile) && !CanRemoveRoadWithStop(tile, flags))
03181         return_cmd_error(STR_3047_MUST_DEMOLISH_TRUCK_STATION);
03182       return RemoveRoadStop(st, flags, tile);
03183     case STATION_BUS:
03184       if (IsDriveThroughStopTile(tile) && !CanRemoveRoadWithStop(tile, flags))
03185         return_cmd_error(STR_3046_MUST_DEMOLISH_BUS_STATION);
03186       return RemoveRoadStop(st, flags, tile);
03187     case STATION_BUOY:    return RemoveBuoy(st, flags);
03188     case STATION_DOCK:    return RemoveDock(st, flags);
03189     default: break;
03190   }
03191 
03192   return CMD_ERROR;
03193 }
03194 
03195 void InitializeStations()
03196 {
03197   /* Clean the station pool and create 1 block in it */
03198   _Station_pool.CleanPool();
03199   _Station_pool.AddBlockToPool();
03200 
03201   /* Clean the roadstop pool and create 1 block in it */
03202   _RoadStop_pool.CleanPool();
03203   _RoadStop_pool.AddBlockToPool();
03204 }
03205 
03206 static CommandCost TerraformTile_Station(TileIndex tile, DoCommandFlag flags, uint z_new, Slope tileh_new)
03207 {
03208   if (_settings_game.construction.build_on_slopes && AutoslopeEnabled()) {
03209     /* TODO: If you implement newgrf callback 149 'land slope check', you have to decide what to do with it here.
03210      *       TTDP does not call it.
03211      */
03212     if (!IsSteepSlope(tileh_new) && (GetTileMaxZ(tile) == z_new + GetSlopeMaxZ(tileh_new))) {
03213       switch (GetStationType(tile)) {
03214         case STATION_RAIL: {
03215           DiagDirection direction = AxisToDiagDir(GetRailStationAxis(tile));
03216           if (!AutoslopeCheckForEntranceEdge(tile, z_new, tileh_new, direction)) break;
03217           if (!AutoslopeCheckForEntranceEdge(tile, z_new, tileh_new, ReverseDiagDir(direction))) break;
03218           return CommandCost(EXPENSES_CONSTRUCTION, _price.terraform);
03219         }
03220 
03221         case STATION_AIRPORT:
03222           return CommandCost(EXPENSES_CONSTRUCTION, _price.terraform);
03223 
03224         case STATION_TRUCK:
03225         case STATION_BUS: {
03226           DiagDirection direction = GetRoadStopDir(tile);
03227           if (!AutoslopeCheckForEntranceEdge(tile, z_new, tileh_new, direction)) break;
03228           if (IsDriveThroughStopTile(tile)) {
03229             if (!AutoslopeCheckForEntranceEdge(tile, z_new, tileh_new, ReverseDiagDir(direction))) break;
03230           }
03231           return CommandCost(EXPENSES_CONSTRUCTION, _price.terraform);
03232         }
03233 
03234         default: break;
03235       }
03236     }
03237   }
03238   return DoCommand(tile, 0, 0, flags, CMD_LANDSCAPE_CLEAR);
03239 }
03240 
03241 
03242 extern const TileTypeProcs _tile_type_station_procs = {
03243   DrawTile_Station,           // draw_tile_proc
03244   GetSlopeZ_Station,          // get_slope_z_proc
03245   ClearTile_Station,          // clear_tile_proc
03246   GetAcceptedCargo_Station,   // get_accepted_cargo_proc
03247   GetTileDesc_Station,        // get_tile_desc_proc
03248   GetTileTrackStatus_Station, // get_tile_track_status_proc
03249   ClickTile_Station,          // click_tile_proc
03250   AnimateTile_Station,        // animate_tile_proc
03251   TileLoop_Station,           // tile_loop_clear
03252   ChangeTileOwner_Station,    // change_tile_owner_clear
03253   NULL,                       // get_produced_cargo_proc
03254   VehicleEnter_Station,       // vehicle_enter_tile_proc
03255   GetFoundation_Station,      // get_foundation_proc
03256   TerraformTile_Station,      // terraform_tile_proc
03257 };

Generated on Wed Jun 3 19:05:14 2009 for OpenTTD by  doxygen 1.5.6