station.cpp

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00001 /* $Id$ */
00002 
00003 /*
00004  * This file is part of OpenTTD.
00005  * OpenTTD is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, version 2.
00006  * OpenTTD is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
00007  * See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with OpenTTD. If not, see <http://www.gnu.org/licenses/>.
00008  */
00009 
00012 #include "stdafx.h"
00013 #include "company_func.h"
00014 #include "company_base.h"
00015 #include "roadveh.h"
00016 #include "viewport_func.h"
00017 #include "window_func.h"
00018 #include "date_func.h"
00019 #include "command_func.h"
00020 #include "news_func.h"
00021 #include "aircraft.h"
00022 #include "vehiclelist.h"
00023 #include "core/pool_func.hpp"
00024 #include "station_base.h"
00025 #include "roadstop_base.h"
00026 #include "industry.h"
00027 #include "core/random_func.hpp"
00028 
00029 #include "table/strings.h"
00030 
00032 StationPool _station_pool("Station");
00033 INSTANTIATE_POOL_METHODS(Station)
00034 
00035 BaseStation::~BaseStation()
00036 {
00037   free(this->name);
00038   free(this->speclist);
00039 
00040   if (CleaningPool()) return;
00041 
00042   Owner owner = this->owner;
00043   if (!Company::IsValidID(owner)) owner = _local_company;
00044   if (!Company::IsValidID(owner)) return; // Spectators
00045   DeleteWindowById(WC_TRAINS_LIST,   VehicleListIdentifier(VL_STATION_LIST, VEH_TRAIN,    owner, this->index).Pack());
00046   DeleteWindowById(WC_ROADVEH_LIST,  VehicleListIdentifier(VL_STATION_LIST, VEH_ROAD,     owner, this->index).Pack());
00047   DeleteWindowById(WC_SHIPS_LIST,    VehicleListIdentifier(VL_STATION_LIST, VEH_SHIP,     owner, this->index).Pack());
00048   DeleteWindowById(WC_AIRCRAFT_LIST, VehicleListIdentifier(VL_STATION_LIST, VEH_AIRCRAFT, owner, this->index).Pack());
00049 
00050   this->sign.MarkDirty();
00051 }
00052 
00053 Station::Station(TileIndex tile) :
00054   SpecializedStation<Station, false>(tile),
00055   bus_station(INVALID_TILE, 0, 0),
00056   truck_station(INVALID_TILE, 0, 0),
00057   dock_tile(INVALID_TILE),
00058   indtype(IT_INVALID),
00059   time_since_load(255),
00060   time_since_unload(255),
00061   last_vehicle_type(VEH_INVALID)
00062 {
00063   /* this->random_bits is set in Station::AddFacility() */
00064 
00065   /* has to be done like this as we can't give arguments when constructing an array */
00066   for (CargoID i = 0; i < NUM_CARGO; ++i) {
00067     this->goods[i].cargo.AssignTo(this, i);
00068   }
00069 }
00070 
00078 Station::~Station()
00079 {
00080   if (CleaningPool()) {
00081     for (CargoID c = 0; c < NUM_CARGO; c++) {
00082       this->goods[c].cargo.OnCleanPool();
00083     }
00084     return;
00085   }
00086 
00087   while (!this->loading_vehicles.empty()) {
00088     this->loading_vehicles.front()->LeaveStation();
00089   }
00090 
00091   Aircraft *a;
00092   FOR_ALL_AIRCRAFT(a) {
00093     if (!a->IsNormalAircraft()) continue;
00094     if (a->targetairport == this->index) a->targetairport = INVALID_STATION;
00095   }
00096 
00097   Station *st;
00098   FOR_ALL_STATIONS(st) {
00099     for (CargoID c = 0; c < NUM_CARGO; ++c) {
00100       GoodsEntry &ge = st->goods[c];
00101       ge.link_stats.erase(this->index);
00102       DeleteStaleFlows(st->index, c, this->index);
00103       ge.cargo.RerouteStalePackets(this->index);
00104     }
00105   }
00106 
00107   Vehicle *v;
00108   FOR_ALL_VEHICLES(v) {
00109     /* Forget about this station if this station is removed */
00110     if (v->last_station_visited == this->index) {
00111       v->last_station_visited = INVALID_STATION;
00112     }
00113     if (v->last_loading_station == this->index) {
00114       v->last_loading_station = INVALID_STATION;
00115     }
00116   }
00117 
00118   InvalidateWindowData(WC_STATION_LIST, this->owner, 0);
00119 
00120   DeleteWindowById(WC_STATION_VIEW, index);
00121 
00122   /* Now delete all orders that go to the station */
00123   RemoveOrderFromAllVehicles(OT_GOTO_STATION, this->index);
00124 
00125   /* Remove all news items */
00126   DeleteStationNews(this->index);
00127 
00128   for (CargoID c = 0; c < NUM_CARGO; c++) {
00129     this->goods[c].cargo.Truncate(0);
00130   }
00131 
00132   CargoPacket::InvalidateAllFrom(this->index);
00133 }
00134 
00135 
00141 void BaseStation::PostDestructor(size_t index)
00142 {
00143   InvalidateWindowData(WC_SELECT_STATION, 0, 0);
00144 }
00145 
00151 RoadStop *Station::GetPrimaryRoadStop(const RoadVehicle *v) const
00152 {
00153   RoadStop *rs = this->GetPrimaryRoadStop(v->IsBus() ? ROADSTOP_BUS : ROADSTOP_TRUCK);
00154 
00155   for (; rs != NULL; rs = rs->next) {
00156     /* The vehicle cannot go to this roadstop (different roadtype) */
00157     if ((GetRoadTypes(rs->xy) & v->compatible_roadtypes) == ROADTYPES_NONE) continue;
00158     /* The vehicle is articulated and can therefor not go the a standard road stop */
00159     if (IsStandardRoadStopTile(rs->xy) && v->HasArticulatedPart()) continue;
00160 
00161     /* The vehicle can actually go to this road stop. So, return it! */
00162     break;
00163   }
00164 
00165   return rs;
00166 }
00167 
00172 void Station::AddFacility(StationFacility new_facility_bit, TileIndex facil_xy)
00173 {
00174   if (this->facilities == FACIL_NONE) {
00175     this->xy = facil_xy;
00176     this->random_bits = Random();
00177   }
00178   this->facilities |= new_facility_bit;
00179   this->owner = _current_company;
00180   this->build_date = _date;
00181 }
00182 
00188 void Station::MarkTilesDirty(bool cargo_change) const
00189 {
00190   TileIndex tile = this->train_station.tile;
00191   int w, h;
00192 
00193   if (tile == INVALID_TILE) return;
00194 
00195   /* cargo_change is set if we're refreshing the tiles due to cargo moving
00196    * around. */
00197   if (cargo_change) {
00198     /* Don't waste time updating if there are no custom station graphics
00199      * that might change. Even if there are custom graphics, they might
00200      * not change. Unfortunately we have no way of telling. */
00201     if (this->num_specs == 0) return;
00202   }
00203 
00204   for (h = 0; h < train_station.h; h++) {
00205     for (w = 0; w < train_station.w; w++) {
00206       if (this->TileBelongsToRailStation(tile)) {
00207         MarkTileDirtyByTile(tile);
00208       }
00209       tile += TileDiffXY(1, 0);
00210     }
00211     tile += TileDiffXY(-w, 1);
00212   }
00213 }
00214 
00215 /* virtual */ uint Station::GetPlatformLength(TileIndex tile) const
00216 {
00217   assert(this->TileBelongsToRailStation(tile));
00218 
00219   TileIndexDiff delta = (GetRailStationAxis(tile) == AXIS_X ? TileDiffXY(1, 0) : TileDiffXY(0, 1));
00220 
00221   TileIndex t = tile;
00222   uint len = 0;
00223   do {
00224     t -= delta;
00225     len++;
00226   } while (IsCompatibleTrainStationTile(t, tile));
00227 
00228   t = tile;
00229   do {
00230     t += delta;
00231     len++;
00232   } while (IsCompatibleTrainStationTile(t, tile));
00233 
00234   return len - 1;
00235 }
00236 
00237 /* virtual */ uint Station::GetPlatformLength(TileIndex tile, DiagDirection dir) const
00238 {
00239   TileIndex start_tile = tile;
00240   uint length = 0;
00241   assert(IsRailStationTile(tile));
00242   assert(dir < DIAGDIR_END);
00243 
00244   do {
00245     length++;
00246     tile += TileOffsByDiagDir(dir);
00247   } while (IsCompatibleTrainStationTile(tile, start_tile));
00248 
00249   return length;
00250 }
00251 
00256 uint Station::GetCatchmentRadius() const
00257 {
00258   uint ret = CA_NONE;
00259 
00260   if (_settings_game.station.modified_catchment) {
00261     if (this->bus_stops          != NULL)         ret = max<uint>(ret, CA_BUS);
00262     if (this->truck_stops        != NULL)         ret = max<uint>(ret, CA_TRUCK);
00263     if (this->train_station.tile != INVALID_TILE) ret = max<uint>(ret, CA_TRAIN);
00264     if (this->dock_tile          != INVALID_TILE) ret = max<uint>(ret, CA_DOCK);
00265     if (this->airport.tile       != INVALID_TILE) ret = max<uint>(ret, this->airport.GetSpec()->catchment);
00266   } else {
00267     if (this->bus_stops != NULL || this->truck_stops != NULL || this->train_station.tile != INVALID_TILE || this->dock_tile != INVALID_TILE || this->airport.tile != INVALID_TILE) {
00268       ret = CA_UNMODIFIED;
00269     }
00270   }
00271 
00272   return ret;
00273 }
00274 
00279 Rect Station::GetCatchmentRect() const
00280 {
00281   assert(!this->rect.IsEmpty());
00282 
00283   /* Compute acceptance rectangle */
00284   int catchment_radius = this->GetCatchmentRadius();
00285 
00286   Rect ret = {
00287     max<int>(this->rect.left   - catchment_radius, 0),
00288     max<int>(this->rect.top    - catchment_radius, 0),
00289     min<int>(this->rect.right  + catchment_radius, MapMaxX()),
00290     min<int>(this->rect.bottom + catchment_radius, MapMaxY())
00291   };
00292 
00293   return ret;
00294 }
00295 
00297 struct RectAndIndustryVector {
00298   Rect rect;                       
00299   IndustryVector *industries_near; 
00300 };
00301 
00310 static bool FindIndustryToDeliver(TileIndex ind_tile, void *user_data)
00311 {
00312   /* Only process industry tiles */
00313   if (!IsTileType(ind_tile, MP_INDUSTRY)) return false;
00314 
00315   RectAndIndustryVector *riv = (RectAndIndustryVector *)user_data;
00316   Industry *ind = Industry::GetByTile(ind_tile);
00317 
00318   /* Don't check further if this industry is already in the list */
00319   if (riv->industries_near->Contains(ind)) return false;
00320 
00321   /* Only process tiles in the station acceptance rectangle */
00322   int x = TileX(ind_tile);
00323   int y = TileY(ind_tile);
00324   if (x < riv->rect.left || x > riv->rect.right || y < riv->rect.top || y > riv->rect.bottom) return false;
00325 
00326   /* Include only industries that can accept cargo */
00327   uint cargo_index;
00328   for (cargo_index = 0; cargo_index < lengthof(ind->accepts_cargo); cargo_index++) {
00329     if (ind->accepts_cargo[cargo_index] != CT_INVALID) break;
00330   }
00331   if (cargo_index >= lengthof(ind->accepts_cargo)) return false;
00332 
00333   *riv->industries_near->Append() = ind;
00334 
00335   return false;
00336 }
00337 
00342 void Station::RecomputeIndustriesNear()
00343 {
00344   this->industries_near.Clear();
00345   if (this->rect.IsEmpty()) return;
00346 
00347   RectAndIndustryVector riv = {
00348     this->GetCatchmentRect(),
00349     &this->industries_near
00350   };
00351 
00352   /* Compute maximum extent of acceptance rectangle wrt. station sign */
00353   TileIndex start_tile = this->xy;
00354   uint max_radius = max(
00355     max(DistanceManhattan(start_tile, TileXY(riv.rect.left,  riv.rect.top)), DistanceManhattan(start_tile, TileXY(riv.rect.left,  riv.rect.bottom))),
00356     max(DistanceManhattan(start_tile, TileXY(riv.rect.right, riv.rect.top)), DistanceManhattan(start_tile, TileXY(riv.rect.right, riv.rect.bottom)))
00357   );
00358 
00359   CircularTileSearch(&start_tile, 2 * max_radius + 1, &FindIndustryToDeliver, &riv);
00360 }
00361 
00365 /* static */ void Station::RecomputeIndustriesNearForAll()
00366 {
00367   Station *st;
00368   FOR_ALL_STATIONS(st) st->RecomputeIndustriesNear();
00369 }
00370 
00371 /************************************************************************/
00372 /*                     StationRect implementation                       */
00373 /************************************************************************/
00374 
00375 StationRect::StationRect()
00376 {
00377   this->MakeEmpty();
00378 }
00379 
00380 void StationRect::MakeEmpty()
00381 {
00382   this->left = this->top = this->right = this->bottom = 0;
00383 }
00384 
00394 bool StationRect::PtInExtendedRect(int x, int y, int distance) const
00395 {
00396   return this->left - distance <= x && x <= this->right + distance &&
00397       this->top - distance <= y && y <= this->bottom + distance;
00398 }
00399 
00400 bool StationRect::IsEmpty() const
00401 {
00402   return this->left == 0 || this->left > this->right || this->top > this->bottom;
00403 }
00404 
00405 CommandCost StationRect::BeforeAddTile(TileIndex tile, StationRectMode mode)
00406 {
00407   int x = TileX(tile);
00408   int y = TileY(tile);
00409   if (this->IsEmpty()) {
00410     /* we are adding the first station tile */
00411     if (mode != ADD_TEST) {
00412       this->left = this->right = x;
00413       this->top = this->bottom = y;
00414     }
00415   } else if (!this->PtInExtendedRect(x, y)) {
00416     /* current rect is not empty and new point is outside this rect
00417      * make new spread-out rectangle */
00418     Rect new_rect = {min(x, this->left), min(y, this->top), max(x, this->right), max(y, this->bottom)};
00419 
00420     /* check new rect dimensions against preset max */
00421     int w = new_rect.right - new_rect.left + 1;
00422     int h = new_rect.bottom - new_rect.top + 1;
00423     if (mode != ADD_FORCE && (w > _settings_game.station.station_spread || h > _settings_game.station.station_spread)) {
00424       assert(mode != ADD_TRY);
00425       return_cmd_error(STR_ERROR_STATION_TOO_SPREAD_OUT);
00426     }
00427 
00428     /* spread-out ok, return true */
00429     if (mode != ADD_TEST) {
00430       /* we should update the station rect */
00431       *this = new_rect;
00432     }
00433   } else {
00434     ; // new point is inside the rect, we don't need to do anything
00435   }
00436   return CommandCost();
00437 }
00438 
00439 CommandCost StationRect::BeforeAddRect(TileIndex tile, int w, int h, StationRectMode mode)
00440 {
00441   if (mode == ADD_FORCE || (w <= _settings_game.station.station_spread && h <= _settings_game.station.station_spread)) {
00442     /* Important when the old rect is completely inside the new rect, resp. the old one was empty. */
00443     CommandCost ret = this->BeforeAddTile(tile, mode);
00444     if (ret.Succeeded()) ret = this->BeforeAddTile(TILE_ADDXY(tile, w - 1, h - 1), mode);
00445     return ret;
00446   }
00447   return CommandCost();
00448 }
00449 
00459 /* static */ bool StationRect::ScanForStationTiles(StationID st_id, int left_a, int top_a, int right_a, int bottom_a)
00460 {
00461   TileArea ta(TileXY(left_a, top_a), TileXY(right_a, bottom_a));
00462   TILE_AREA_LOOP(tile, ta) {
00463     if (IsTileType(tile, MP_STATION) && GetStationIndex(tile) == st_id) return true;
00464   }
00465 
00466   return false;
00467 }
00468 
00469 bool StationRect::AfterRemoveTile(BaseStation *st, TileIndex tile)
00470 {
00471   int x = TileX(tile);
00472   int y = TileY(tile);
00473 
00474   /* look if removed tile was on the bounding rect edge
00475    * and try to reduce the rect by this edge
00476    * do it until we have empty rect or nothing to do */
00477   for (;;) {
00478     /* check if removed tile is on rect edge */
00479     bool left_edge = (x == this->left);
00480     bool right_edge = (x == this->right);
00481     bool top_edge = (y == this->top);
00482     bool bottom_edge = (y == this->bottom);
00483 
00484     /* can we reduce the rect in either direction? */
00485     bool reduce_x = ((left_edge || right_edge) && !ScanForStationTiles(st->index, x, this->top, x, this->bottom));
00486     bool reduce_y = ((top_edge || bottom_edge) && !ScanForStationTiles(st->index, this->left, y, this->right, y));
00487     if (!(reduce_x || reduce_y)) break; // nothing to do (can't reduce)
00488 
00489     if (reduce_x) {
00490       /* reduce horizontally */
00491       if (left_edge) {
00492         /* move left edge right */
00493         this->left = x = x + 1;
00494       } else {
00495         /* move right edge left */
00496         this->right = x = x - 1;
00497       }
00498     }
00499     if (reduce_y) {
00500       /* reduce vertically */
00501       if (top_edge) {
00502         /* move top edge down */
00503         this->top = y = y + 1;
00504       } else {
00505         /* move bottom edge up */
00506         this->bottom = y = y - 1;
00507       }
00508     }
00509 
00510     if (left > right || top > bottom) {
00511       /* can't continue, if the remaining rectangle is empty */
00512       this->MakeEmpty();
00513       return true; // empty remaining rect
00514     }
00515   }
00516   return false; // non-empty remaining rect
00517 }
00518 
00519 bool StationRect::AfterRemoveRect(BaseStation *st, TileArea ta)
00520 {
00521   assert(this->PtInExtendedRect(TileX(ta.tile), TileY(ta.tile)));
00522   assert(this->PtInExtendedRect(TileX(ta.tile) + ta.w - 1, TileY(ta.tile) + ta.h - 1));
00523 
00524   bool empty = this->AfterRemoveTile(st, ta.tile);
00525   if (ta.w != 1 || ta.h != 1) empty = empty || this->AfterRemoveTile(st, TILE_ADDXY(ta.tile, ta.w - 1, ta.h - 1));
00526   return empty;
00527 }
00528 
00529 StationRect& StationRect::operator = (const Rect &src)
00530 {
00531   this->left = src.left;
00532   this->top = src.top;
00533   this->right = src.right;
00534   this->bottom = src.bottom;
00535   return *this;
00536 }

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