station.cpp

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00001 /* $Id: station.cpp 19995 2010-06-19 16:35:37Z rubidium $ */
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 "functions.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 "vehicle_gui.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 
00031 StationPool _station_pool("Station");
00032 INSTANTIATE_POOL_METHODS(Station)
00033 
00034 BaseStation::~BaseStation()
00035 {
00036   free(this->name);
00037   free(this->speclist);
00038 }
00039 
00040 Station::Station(TileIndex tile) :
00041   SpecializedStation<Station, false>(tile),
00042   bus_station(INVALID_TILE, 0, 0),
00043   truck_station(INVALID_TILE, 0, 0),
00044   airport_tile(INVALID_TILE),
00045   dock_tile(INVALID_TILE),
00046   indtype(IT_INVALID),
00047   time_since_load(255),
00048   time_since_unload(255),
00049   last_vehicle_type(VEH_INVALID)
00050 {
00051   /* this->random_bits is set in Station::AddFacility() */
00052 }
00053 
00060 Station::~Station()
00061 {
00062   if (CleaningPool()) return;
00063 
00064   while (!this->loading_vehicles.empty()) {
00065     this->loading_vehicles.front()->LeaveStation();
00066   }
00067 
00068   Aircraft *a;
00069   FOR_ALL_AIRCRAFT(a) {
00070     if (!a->IsNormalAircraft()) continue;
00071     if (a->targetairport == this->index) a->targetairport = INVALID_STATION;
00072   }
00073 
00074   Vehicle *v;
00075   FOR_ALL_VEHICLES(v) {
00076     /* Forget about this station if this station is removed */
00077     if (v->last_station_visited == this->index) {
00078       v->last_station_visited = INVALID_STATION;
00079     }
00080   }
00081 
00082   this->sign.MarkDirty();
00083   InvalidateWindowData(WC_STATION_LIST, this->owner, 0);
00084 
00085   DeleteWindowById(WC_STATION_VIEW, index);
00086 
00087   Owner owner = this->owner;
00088   if (!Company::IsValidID(owner)) owner = _local_company;
00089   WindowNumber wno = (this->index << 16) | VLW_STATION_LIST | owner;
00090   DeleteWindowById(WC_TRAINS_LIST, wno | (VEH_TRAIN << 11));
00091   DeleteWindowById(WC_ROADVEH_LIST, wno | (VEH_ROAD << 11));
00092   DeleteWindowById(WC_SHIPS_LIST, wno | (VEH_SHIP << 11));
00093   DeleteWindowById(WC_AIRCRAFT_LIST, wno | (VEH_AIRCRAFT << 11));
00094 
00095   /* Now delete all orders that go to the station */
00096   RemoveOrderFromAllVehicles(OT_GOTO_STATION, this->index);
00097 
00098   /* Remove all news items */
00099   DeleteStationNews(this->index);
00100 
00101   for (CargoID c = 0; c < NUM_CARGO; c++) {
00102     this->goods[c].cargo.Truncate(0);
00103   }
00104 
00105   CargoPacket::InvalidateAllFrom(this->index);
00106 }
00107 
00108 
00114 void BaseStation::PostDestructor(size_t index)
00115 {
00116   InvalidateWindowData(WC_SELECT_STATION, 0, 0);
00117 }
00118 
00124 RoadStop *Station::GetPrimaryRoadStop(const RoadVehicle *v) const
00125 {
00126   RoadStop *rs = this->GetPrimaryRoadStop(v->IsBus() ? ROADSTOP_BUS : ROADSTOP_TRUCK);
00127 
00128   for (; rs != NULL; rs = rs->next) {
00129     /* The vehicle cannot go to this roadstop (different roadtype) */
00130     if ((GetRoadTypes(rs->xy) & v->compatible_roadtypes) == ROADTYPES_NONE) continue;
00131     /* The vehicle is articulated and can therefor not go the a standard road stop */
00132     if (IsStandardRoadStopTile(rs->xy) && v->HasArticulatedPart()) continue;
00133 
00134     /* The vehicle can actually go to this road stop. So, return it! */
00135     break;
00136   }
00137 
00138   return rs;
00139 }
00140 
00143 void Station::AddFacility(StationFacility new_facility_bit, TileIndex facil_xy)
00144 {
00145   if (this->facilities == FACIL_NONE) {
00146     this->xy = facil_xy;
00147     this->random_bits = Random();
00148   }
00149   this->facilities |= new_facility_bit;
00150   this->owner = _current_company;
00151   this->build_date = _date;
00152 }
00153 
00154 void Station::MarkTilesDirty(bool cargo_change) const
00155 {
00156   TileIndex tile = this->train_station.tile;
00157   int w, h;
00158 
00159   if (tile == INVALID_TILE) return;
00160 
00161   /* cargo_change is set if we're refreshing the tiles due to cargo moving
00162    * around. */
00163   if (cargo_change) {
00164     /* Don't waste time updating if there are no custom station graphics
00165      * that might change. Even if there are custom graphics, they might
00166      * not change. Unfortunately we have no way of telling. */
00167     if (this->num_specs == 0) return;
00168   }
00169 
00170   for (h = 0; h < train_station.h; h++) {
00171     for (w = 0; w < train_station.w; w++) {
00172       if (this->TileBelongsToRailStation(tile)) {
00173         MarkTileDirtyByTile(tile);
00174       }
00175       tile += TileDiffXY(1, 0);
00176     }
00177     tile += TileDiffXY(-w, 1);
00178   }
00179 }
00180 
00181 /* virtual */ uint Station::GetPlatformLength(TileIndex tile) const
00182 {
00183   assert(this->TileBelongsToRailStation(tile));
00184 
00185   TileIndexDiff delta = (GetRailStationAxis(tile) == AXIS_X ? TileDiffXY(1, 0) : TileDiffXY(0, 1));
00186 
00187   TileIndex t = tile;
00188   uint len = 0;
00189   do {
00190     t -= delta;
00191     len++;
00192   } while (IsCompatibleTrainStationTile(t, tile));
00193 
00194   t = tile;
00195   do {
00196     t += delta;
00197     len++;
00198   } while (IsCompatibleTrainStationTile(t, tile));
00199 
00200   return len - 1;
00201 }
00202 
00203 /* virtual */ uint Station::GetPlatformLength(TileIndex tile, DiagDirection dir) const
00204 {
00205   TileIndex start_tile = tile;
00206   uint length = 0;
00207   assert(IsRailStationTile(tile));
00208   assert(dir < DIAGDIR_END);
00209 
00210   do {
00211     length++;
00212     tile += TileOffsByDiagDir(dir);
00213   } while (IsCompatibleTrainStationTile(tile, start_tile));
00214 
00215   return length;
00216 }
00217 
00221 uint Station::GetCatchmentRadius() const
00222 {
00223   uint ret = CA_NONE;
00224 
00225   if (_settings_game.station.modified_catchment) {
00226     if (this->bus_stops          != NULL)         ret = max<uint>(ret, CA_BUS);
00227     if (this->truck_stops        != NULL)         ret = max<uint>(ret, CA_TRUCK);
00228     if (this->train_station.tile != INVALID_TILE) ret = max<uint>(ret, CA_TRAIN);
00229     if (this->dock_tile          != INVALID_TILE) ret = max<uint>(ret, CA_DOCK);
00230     if (this->airport_tile       != INVALID_TILE) ret = max<uint>(ret, this->GetAirportSpec()->catchment);
00231   } else {
00232     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) {
00233       ret = CA_UNMODIFIED;
00234     }
00235   }
00236 
00237   return ret;
00238 }
00239 
00244 Rect Station::GetCatchmentRect() const
00245 {
00246   assert(!this->rect.IsEmpty());
00247 
00248   /* Compute acceptance rectangle */
00249   int catchment_radius = this->GetCatchmentRadius();
00250 
00251   Rect ret = {
00252     max<int>(this->rect.left   - catchment_radius, 0),
00253     max<int>(this->rect.top    - catchment_radius, 0),
00254     min<int>(this->rect.right  + catchment_radius, MapMaxX()),
00255     min<int>(this->rect.bottom + catchment_radius, MapMaxY())
00256   };
00257 
00258   return ret;
00259 }
00260 
00262 struct RectAndIndustryVector {
00263   Rect rect;
00264   IndustryVector *industries_near;
00265 };
00266 
00275 static bool FindIndustryToDeliver(TileIndex ind_tile, void *user_data)
00276 {
00277   /* Only process industry tiles */
00278   if (!IsTileType(ind_tile, MP_INDUSTRY)) return false;
00279 
00280   RectAndIndustryVector *riv = (RectAndIndustryVector *)user_data;
00281   Industry *ind = Industry::GetByTile(ind_tile);
00282 
00283   /* Don't check further if this industry is already in the list */
00284   if (riv->industries_near->Contains(ind)) return false;
00285 
00286   /* Only process tiles in the station acceptance rectangle */
00287   int x = TileX(ind_tile);
00288   int y = TileY(ind_tile);
00289   if (x < riv->rect.left || x > riv->rect.right || y < riv->rect.top || y > riv->rect.bottom) return false;
00290 
00291   /* Include only industries that can accept cargo */
00292   uint cargo_index;
00293   for (cargo_index = 0; cargo_index < lengthof(ind->accepts_cargo); cargo_index++) {
00294     if (ind->accepts_cargo[cargo_index] != CT_INVALID) break;
00295   }
00296   if (cargo_index >= lengthof(ind->accepts_cargo)) return false;
00297 
00298   *riv->industries_near->Append() = ind;
00299 
00300   return false;
00301 }
00302 
00307 void Station::RecomputeIndustriesNear()
00308 {
00309   this->industries_near.Clear();
00310   if (this->rect.IsEmpty()) return;
00311 
00312   RectAndIndustryVector riv = {
00313     this->GetCatchmentRect(),
00314     &this->industries_near
00315   };
00316 
00317   /* Compute maximum extent of acceptance rectangle wrt. station sign */
00318   TileIndex start_tile = this->xy;
00319   uint max_radius = max(
00320     max(DistanceManhattan(start_tile, TileXY(riv.rect.left,  riv.rect.top)), DistanceManhattan(start_tile, TileXY(riv.rect.left,  riv.rect.bottom))),
00321     max(DistanceManhattan(start_tile, TileXY(riv.rect.right, riv.rect.top)), DistanceManhattan(start_tile, TileXY(riv.rect.right, riv.rect.bottom)))
00322   );
00323 
00324   CircularTileSearch(&start_tile, 2 * max_radius + 1, &FindIndustryToDeliver, &riv);
00325 }
00326 
00330 /* static */ void Station::RecomputeIndustriesNearForAll()
00331 {
00332   Station *st;
00333   FOR_ALL_STATIONS(st) st->RecomputeIndustriesNear();
00334 }
00335 
00336 /************************************************************************/
00337 /*                     StationRect implementation                       */
00338 /************************************************************************/
00339 
00340 StationRect::StationRect()
00341 {
00342   this->MakeEmpty();
00343 }
00344 
00345 void StationRect::MakeEmpty()
00346 {
00347   this->left = this->top = this->right = this->bottom = 0;
00348 }
00349 
00359 bool StationRect::PtInExtendedRect(int x, int y, int distance) const
00360 {
00361   return
00362       this->left - distance <= x &&
00363       x <= this->right + distance &&
00364       this->top - distance <= y &&
00365       y <= this->bottom + distance;
00366 }
00367 
00368 bool StationRect::IsEmpty() const
00369 {
00370   return this->left == 0 || this->left > this->right || this->top > this->bottom;
00371 }
00372 
00373 bool StationRect::BeforeAddTile(TileIndex tile, StationRectMode mode)
00374 {
00375   int x = TileX(tile);
00376   int y = TileY(tile);
00377   if (IsEmpty()) {
00378     /* we are adding the first station tile */
00379     if (mode != ADD_TEST) {
00380       this->left = this->right = x;
00381       this->top = this->bottom = y;
00382     }
00383   } else if (!PtInExtendedRect(x, y)) {
00384     /* current rect is not empty and new point is outside this rect
00385      * make new spread-out rectangle */
00386     Rect new_rect = {min(x, this->left), min(y, this->top), max(x, this->right), max(y, this->bottom)};
00387 
00388     /* check new rect dimensions against preset max */
00389     int w = new_rect.right - new_rect.left + 1;
00390     int h = new_rect.bottom - new_rect.top + 1;
00391     if (mode != ADD_FORCE && (w > _settings_game.station.station_spread || h > _settings_game.station.station_spread)) {
00392       assert(mode != ADD_TRY);
00393       _error_message = STR_ERROR_STATION_TOO_SPREAD_OUT;
00394       return false;
00395     }
00396 
00397     /* spread-out ok, return true */
00398     if (mode != ADD_TEST) {
00399       /* we should update the station rect */
00400       *this = new_rect;
00401     }
00402   } else {
00403     ; // new point is inside the rect, we don't need to do anything
00404   }
00405   return true;
00406 }
00407 
00408 bool StationRect::BeforeAddRect(TileIndex tile, int w, int h, StationRectMode mode)
00409 {
00410   return (mode == ADD_FORCE || (w <= _settings_game.station.station_spread && h <= _settings_game.station.station_spread)) && // important when the old rect is completely inside the new rect, resp. the old one was empty
00411       this->BeforeAddTile(tile, mode) && this->BeforeAddTile(TILE_ADDXY(tile, w - 1, h - 1), mode);
00412 }
00413 
00423 /* static */ bool StationRect::ScanForStationTiles(StationID st_id, int left_a, int top_a, int right_a, int bottom_a)
00424 {
00425   TileIndex top_left = TileXY(left_a, top_a);
00426   int width = right_a - left_a + 1;
00427   int height = bottom_a - top_a + 1;
00428 
00429   TILE_LOOP(tile, width, height, top_left) {
00430     if (IsTileType(tile, MP_STATION) && GetStationIndex(tile) == st_id) return true;
00431   }
00432 
00433   return false;
00434 }
00435 
00436 bool StationRect::AfterRemoveTile(BaseStation *st, TileIndex tile)
00437 {
00438   int x = TileX(tile);
00439   int y = TileY(tile);
00440 
00441   /* look if removed tile was on the bounding rect edge
00442    * and try to reduce the rect by this edge
00443    * do it until we have empty rect or nothing to do */
00444   for (;;) {
00445     /* check if removed tile is on rect edge */
00446     bool left_edge = (x == this->left);
00447     bool right_edge = (x == this->right);
00448     bool top_edge = (y == this->top);
00449     bool bottom_edge = (y == this->bottom);
00450 
00451     /* can we reduce the rect in either direction? */
00452     bool reduce_x = ((left_edge || right_edge) && !ScanForStationTiles(st->index, x, this->top, x, this->bottom));
00453     bool reduce_y = ((top_edge || bottom_edge) && !ScanForStationTiles(st->index, this->left, y, this->right, y));
00454     if (!(reduce_x || reduce_y)) break; // nothing to do (can't reduce)
00455 
00456     if (reduce_x) {
00457       /* reduce horizontally */
00458       if (left_edge) {
00459         /* move left edge right */
00460         this->left = x = x + 1;
00461       } else {
00462         /* move right edge left */
00463         this->right = x = x - 1;
00464       }
00465     }
00466     if (reduce_y) {
00467       /* reduce vertically */
00468       if (top_edge) {
00469         /* move top edge down */
00470         this->top = y = y + 1;
00471       } else {
00472         /* move bottom edge up */
00473         this->bottom = y = y - 1;
00474       }
00475     }
00476 
00477     if (left > right || top > bottom) {
00478       /* can't continue, if the remaining rectangle is empty */
00479       this->MakeEmpty();
00480       return true; // empty remaining rect
00481     }
00482   }
00483   return false; // non-empty remaining rect
00484 }
00485 
00486 bool StationRect::AfterRemoveRect(BaseStation *st, TileIndex tile, int w, int h)
00487 {
00488   assert(PtInExtendedRect(TileX(tile), TileY(tile)));
00489   assert(PtInExtendedRect(TileX(tile) + w - 1, TileY(tile) + h - 1));
00490 
00491   bool empty = this->AfterRemoveTile(st, tile);
00492   if (w != 1 || h != 1) empty = empty || AfterRemoveTile(st, TILE_ADDXY(tile, w - 1, h - 1));
00493   return empty;
00494 }
00495 
00496 StationRect& StationRect::operator = (Rect src)
00497 {
00498   this->left = src.left;
00499   this->top = src.top;
00500   this->right = src.right;
00501   this->bottom = src.bottom;
00502   return *this;
00503 }
00504 
00505 
00506 void InitializeStations()
00507 {
00508   _station_pool.CleanPool();
00509 }

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