# station.cpp

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    00001 /* $Id: station.cpp 18726 2010-01-04 21:10:20Z 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 "roadveh.h"
    00015 #include "functions.h"
    00016 #include "window_func.h"
    00017 #include "date_func.h"
    00018 #include "command_func.h"
    00019 #include "news_func.h"
    00020 #include "aircraft.h"
    00021 #include "vehicle_gui.h"
    00022 #include "core/pool_func.hpp"
    00023 #include "station_base.h"
    00024 #include "roadstop_base.h"
    00025 #include "industry.h"
    00026
    00027 #include "table/strings.h"
    00028
    00029 StationPool _station_pool("Station");
    00030 INSTANTIATE_POOL_METHODS(Station)
    00031
    00032 BaseStation::~BaseStation()
    00033 {
    00034   free(this->name);
    00035   free(this->speclist);
    00036 }
    00037
    00038 Station::Station(TileIndex tile) :
    00039   SpecializedStation<Station, false>(tile),
    00040   bus_station(INVALID_TILE, 0, 0),
    00041   truck_station(INVALID_TILE, 0, 0),
    00042   airport_tile(INVALID_TILE),
    00043   dock_tile(INVALID_TILE),
    00044   indtype(IT_INVALID),
    00045   time_since_load(255),
    00046   time_since_unload(255),
    00047   last_vehicle_type(VEH_INVALID)
    00048 {
    00049   /* this->random_bits is set in Station::AddFacility() */
    00050 }
    00051
    00058 Station::~Station()
    00059 {
    00060   if (CleaningPool()) return;
    00061
    00062   while (!this->loading_vehicles.empty()) {
    00063     this->loading_vehicles.front()->LeaveStation();
    00064   }
    00065
    00066   Aircraft *a;
    00067   FOR_ALL_AIRCRAFT(a) {
    00068     if (!a->IsNormalAircraft()) continue;
    00069     if (a->targetairport == this->index) a->targetairport = INVALID_STATION;
    00070   }
    00071
    00072   Vehicle *v;
    00073   FOR_ALL_VEHICLES(v) {
    00074     /* Forget about this station if this station is removed */
    00075     if (v->last_station_visited == this->index) {
    00076       v->last_station_visited = INVALID_STATION;
    00077     }
    00078   }
    00079
    00080   this->sign.MarkDirty();
    00081   InvalidateWindowData(WC_STATION_LIST, this->owner, 0);
    00082
    00083   DeleteWindowById(WC_STATION_VIEW, index);
    00084   WindowNumber wno = (this->index << 16) | VLW_STATION_LIST | this->owner;
    00085   DeleteWindowById(WC_TRAINS_LIST, wno | (VEH_TRAIN << 11));
    00086   DeleteWindowById(WC_ROADVEH_LIST, wno | (VEH_ROAD << 11));
    00087   DeleteWindowById(WC_SHIPS_LIST, wno | (VEH_SHIP << 11));
    00088   DeleteWindowById(WC_AIRCRAFT_LIST, wno | (VEH_AIRCRAFT << 11));
    00089
    00090   /* Now delete all orders that go to the station */
    00091   RemoveOrderFromAllVehicles(OT_GOTO_STATION, this->index);
    00092
    00093   /* Remove all news items */
    00094   DeleteStationNews(this->index);
    00095
    00096   for (CargoID c = 0; c < NUM_CARGO; c++) {
    00097     this->goods[c].cargo.Truncate(0);
    00098   }
    00099
    00100   CargoPacket::InvalidateAllFrom(this->index);
    00101 }
    00102
    00103
    00109 void BaseStation::PostDestructor(size_t index)
    00110 {
    00111   InvalidateWindowData(WC_SELECT_STATION, 0, 0);
    00112 }
    00113
    00119 RoadStop *Station::GetPrimaryRoadStop(const RoadVehicle *v) const
    00120 {
    00121   RoadStop *rs = this->GetPrimaryRoadStop(v->IsBus() ? ROADSTOP_BUS : ROADSTOP_TRUCK);
    00122
    00123   for (; rs != NULL; rs = rs->next) {
    00124     /* The vehicle cannot go to this roadstop (different roadtype) */
    00125     if ((GetRoadTypes(rs->xy) & v->compatible_roadtypes) == ROADTYPES_NONE) continue;
    00126     /* The vehicle is articulated and can therefor not go the a standard road stop */
    00127     if (IsStandardRoadStopTile(rs->xy) && v->HasArticulatedPart()) continue;
    00128
    00129     /* The vehicle can actually go to this road stop. So, return it! */
    00130     break;
    00131   }
    00132
    00133   return rs;
    00134 }
    00135
    00138 void Station::AddFacility(StationFacility new_facility_bit, TileIndex facil_xy)
    00139 {
    00140   if (this->facilities == FACIL_NONE) {
    00141     this->xy = facil_xy;
    00142     this->random_bits = Random();
    00143   }
    00144   this->facilities |= new_facility_bit;
    00145   this->owner = _current_company;
    00146   this->build_date = _date;
    00147 }
    00148
    00149 void Station::MarkTilesDirty(bool cargo_change) const
    00150 {
    00151   TileIndex tile = this->train_station.tile;
    00152   int w, h;
    00153
    00154   if (tile == INVALID_TILE) return;
    00155
    00156   /* cargo_change is set if we're refreshing the tiles due to cargo moving
    00157    * around. */
    00158   if (cargo_change) {
    00159     /* Don't waste time updating if there are no custom station graphics
    00160      * that might change. Even if there are custom graphics, they might
    00161      * not change. Unfortunately we have no way of telling. */
    00162     if (this->num_specs == 0) return;
    00163   }
    00164
    00165   for (h = 0; h < train_station.h; h++) {
    00166     for (w = 0; w < train_station.w; w++) {
    00167       if (this->TileBelongsToRailStation(tile)) {
    00168         MarkTileDirtyByTile(tile);
    00169       }
    00170       tile += TileDiffXY(1, 0);
    00171     }
    00172     tile += TileDiffXY(-w, 1);
    00173   }
    00174 }
    00175
    00176 /* virtual */ uint Station::GetPlatformLength(TileIndex tile) const
    00177 {
    00178   assert(this->TileBelongsToRailStation(tile));
    00179
    00180   TileIndexDiff delta = (GetRailStationAxis(tile) == AXIS_X ? TileDiffXY(1, 0) : TileDiffXY(0, 1));
    00181
    00182   TileIndex t = tile;
    00183   uint len = 0;
    00184   do {
    00185     t -= delta;
    00186     len++;
    00187   } while (IsCompatibleTrainStationTile(t, tile));
    00188
    00189   t = tile;
    00190   do {
    00191     t += delta;
    00192     len++;
    00193   } while (IsCompatibleTrainStationTile(t, tile));
    00194
    00195   return len - 1;
    00196 }
    00197
    00198 /* virtual */ uint Station::GetPlatformLength(TileIndex tile, DiagDirection dir) const
    00199 {
    00200   TileIndex start_tile = tile;
    00201   uint length = 0;
    00202   assert(IsRailStationTile(tile));
    00203   assert(dir < DIAGDIR_END);
    00204
    00205   do {
    00206     length++;
    00207     tile += TileOffsByDiagDir(dir);
    00208   } while (IsCompatibleTrainStationTile(tile, start_tile));
    00209
    00210   return length;
    00211 }
    00212
    00216 uint Station::GetCatchmentRadius() const
    00217 {
    00218   uint ret = CA_NONE;
    00219
    00220   if (_settings_game.station.modified_catchment) {
    00221     if (this->bus_stops          != NULL)         ret = max<uint>(ret, CA_BUS);
    00222     if (this->truck_stops        != NULL)         ret = max<uint>(ret, CA_TRUCK);
    00223     if (this->train_station.tile != INVALID_TILE) ret = max<uint>(ret, CA_TRAIN);
    00224     if (this->dock_tile          != INVALID_TILE) ret = max<uint>(ret, CA_DOCK);
    00225     if (this->airport_tile       != INVALID_TILE) ret = max<uint>(ret, this->Airport()->catchment);
    00226   } else {
    00227     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) {
    00228       ret = CA_UNMODIFIED;
    00229     }
    00230   }
    00231
    00232   return ret;
    00233 }
    00234
    00239 Rect Station::GetCatchmentRect() const
    00240 {
    00241   assert(!this->rect.IsEmpty());
    00242
    00243   /* Compute acceptance rectangle */
    00244   int catchment_radius = this->GetCatchmentRadius();
    00245
    00246   Rect ret = {
    00247     max<int>(this->rect.left   - catchment_radius, 0),
    00248     max<int>(this->rect.top    - catchment_radius, 0),
    00249     min<int>(this->rect.right  + catchment_radius, MapMaxX()),
    00250     min<int>(this->rect.bottom + catchment_radius, MapMaxY())
    00251   };
    00252
    00253   return ret;
    00254 }
    00255
    00257 struct RectAndIndustryVector {
    00258   Rect rect;
    00259   IndustryVector *industries_near;
    00260 };
    00261
    00270 static bool FindIndustryToDeliver(TileIndex ind_tile, void *user_data)
    00271 {
    00272   /* Only process industry tiles */
    00273   if (!IsTileType(ind_tile, MP_INDUSTRY)) return false;
    00274
    00275   RectAndIndustryVector *riv = (RectAndIndustryVector *)user_data;
    00276   Industry *ind = Industry::GetByTile(ind_tile);
    00277
    00278   /* Don't check further if this industry is already in the list */
    00279   if (riv->industries_near->Contains(ind)) return false;
    00280
    00281   /* Only process tiles in the station acceptance rectangle */
    00282   int x = TileX(ind_tile);
    00283   int y = TileY(ind_tile);
    00284   if (x < riv->rect.left || x > riv->rect.right || y < riv->rect.top || y > riv->rect.bottom) return false;
    00285
    00286   /* Include only industries that can accept cargo */
    00287   uint cargo_index;
    00288   for (cargo_index = 0; cargo_index < lengthof(ind->accepts_cargo); cargo_index++) {
    00289     if (ind->accepts_cargo[cargo_index] != CT_INVALID) break;
    00290   }
    00291   if (cargo_index >= lengthof(ind->accepts_cargo)) return false;
    00292
    00293   *riv->industries_near->Append() = ind;
    00294
    00295   return false;
    00296 }
    00297
    00302 void Station::RecomputeIndustriesNear()
    00303 {
    00304   this->industries_near.Clear();
    00305   if (this->rect.IsEmpty()) return;
    00306
    00307   RectAndIndustryVector riv = {
    00308     this->GetCatchmentRect(),
    00309     &this->industries_near
    00310   };
    00311
    00312   /* Compute maximum extent of acceptance rectangle wrt. station sign */
    00313   TileIndex start_tile = this->xy;
    00314   uint max_radius = max(
    00315     max(DistanceManhattan(start_tile, TileXY(riv.rect.left,  riv.rect.top)), DistanceManhattan(start_tile, TileXY(riv.rect.left,  riv.rect.bottom))),
    00316     max(DistanceManhattan(start_tile, TileXY(riv.rect.right, riv.rect.top)), DistanceManhattan(start_tile, TileXY(riv.rect.right, riv.rect.bottom)))
    00317   );
    00318
    00319   CircularTileSearch(&start_tile, 2 * max_radius + 1, &FindIndustryToDeliver, &riv);
    00320 }
    00321
    00325 /* static */ void Station::RecomputeIndustriesNearForAll()
    00326 {
    00327   Station *st;
    00328   FOR_ALL_STATIONS(st) st->RecomputeIndustriesNear();
    00329 }
    00330
    00331 /************************************************************************/
    00332 /*                     StationRect implementation                       */
    00333 /************************************************************************/
    00334
    00335 StationRect::StationRect()
    00336 {
    00337   this->MakeEmpty();
    00338 }
    00339
    00340 void StationRect::MakeEmpty()
    00341 {
    00342   this->left = this->top = this->right = this->bottom = 0;
    00343 }
    00344
    00354 bool StationRect::PtInExtendedRect(int x, int y, int distance) const
    00355 {
    00356   return
    00357       this->left - distance <= x &&
    00358       x <= this->right + distance &&
    00359       this->top - distance <= y &&
    00360       y <= this->bottom + distance;
    00361 }
    00362
    00363 bool StationRect::IsEmpty() const
    00364 {
    00365   return this->left == 0 || this->left > this->right || this->top > this->bottom;
    00366 }
    00367
    00368 bool StationRect::BeforeAddTile(TileIndex tile, StationRectMode mode)
    00369 {
    00370   int x = TileX(tile);
    00371   int y = TileY(tile);
    00372   if (IsEmpty()) {
    00373     /* we are adding the first station tile */
    00374     if (mode != ADD_TEST) {
    00375       this->left = this->right = x;
    00376       this->top = this->bottom = y;
    00377     }
    00378   } else if (!PtInExtendedRect(x, y)) {
    00379     /* current rect is not empty and new point is outside this rect
    00380      * make new spread-out rectangle */
    00381     Rect new_rect = {min(x, this->left), min(y, this->top), max(x, this->right), max(y, this->bottom)};
    00382
    00383     /* check new rect dimensions against preset max */
    00384     int w = new_rect.right - new_rect.left + 1;
    00385     int h = new_rect.bottom - new_rect.top + 1;
    00386     if (mode != ADD_FORCE && (w > _settings_game.station.station_spread || h > _settings_game.station.station_spread)) {
    00387       assert(mode != ADD_TRY);
    00388       _error_message = STR_ERROR_STATION_TOO_SPREAD_OUT;
    00389       return false;
    00390     }
    00391
    00392     /* spread-out ok, return true */
    00393     if (mode != ADD_TEST) {
    00394       /* we should update the station rect */
    00395       *this = new_rect;
    00396     }
    00397   } else {
    00398     ; // new point is inside the rect, we don't need to do anything
    00399   }
    00400   return true;
    00401 }
    00402
    00403 bool StationRect::BeforeAddRect(TileIndex tile, int w, int h, StationRectMode mode)
    00404 {
    00405   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
    00406       this->BeforeAddTile(tile, mode) && this->BeforeAddTile(TILE_ADDXY(tile, w - 1, h - 1), mode);
    00407 }
    00408
    00418 /* static */ bool StationRect::ScanForStationTiles(StationID st_id, int left_a, int top_a, int right_a, int bottom_a)
    00419 {
    00420   TileIndex top_left = TileXY(left_a, top_a);
    00421   int width = right_a - left_a + 1;
    00422   int height = bottom_a - top_a + 1;
    00423
    00424   TILE_LOOP(tile, width, height, top_left) {
    00425     if (IsTileType(tile, MP_STATION) && GetStationIndex(tile) == st_id) return true;
    00426   }
    00427
    00428   return false;
    00429 }
    00430
    00431 bool StationRect::AfterRemoveTile(BaseStation *st, TileIndex tile)
    00432 {
    00433   int x = TileX(tile);
    00434   int y = TileY(tile);
    00435
    00436   /* look if removed tile was on the bounding rect edge
    00437    * and try to reduce the rect by this edge
    00438    * do it until we have empty rect or nothing to do */
    00439   for (;;) {
    00440     /* check if removed tile is on rect edge */
    00441     bool left_edge = (x == this->left);
    00442     bool right_edge = (x == this->right);
    00443     bool top_edge = (y == this->top);
    00444     bool bottom_edge = (y == this->bottom);
    00445
    00446     /* can we reduce the rect in either direction? */
    00447     bool reduce_x = ((left_edge || right_edge) && !ScanForStationTiles(st->index, x, this->top, x, this->bottom));
    00448     bool reduce_y = ((top_edge || bottom_edge) && !ScanForStationTiles(st->index, this->left, y, this->right, y));
    00449     if (!(reduce_x || reduce_y)) break; // nothing to do (can't reduce)
    00450
    00451     if (reduce_x) {
    00452       /* reduce horizontally */
    00453       if (left_edge) {
    00454         /* move left edge right */
    00455         this->left = x = x + 1;
    00456       } else {
    00457         /* move right edge left */
    00458         this->right = x = x - 1;
    00459       }
    00460     }
    00461     if (reduce_y) {
    00462       /* reduce vertically */
    00463       if (top_edge) {
    00464         /* move top edge down */
    00465         this->top = y = y + 1;
    00466       } else {
    00467         /* move bottom edge up */
    00468         this->bottom = y = y - 1;
    00469       }
    00470     }
    00471
    00472     if (left > right || top > bottom) {
    00473       /* can't continue, if the remaining rectangle is empty */
    00474       this->MakeEmpty();
    00475       return true; // empty remaining rect
    00476     }
    00477   }
    00478   return false; // non-empty remaining rect
    00479 }
    00480
    00481 bool StationRect::AfterRemoveRect(BaseStation *st, TileIndex tile, int w, int h)
    00482 {
    00483   assert(PtInExtendedRect(TileX(tile), TileY(tile)));
    00484   assert(PtInExtendedRect(TileX(tile) + w - 1, TileY(tile) + h - 1));
    00485
    00486   bool empty = this->AfterRemoveTile(st, tile);
    00487   if (w != 1 || h != 1) empty = empty || AfterRemoveTile(st, TILE_ADDXY(tile, w - 1, h - 1));
    00488   return empty;
    00489 }
    00490
    00491 StationRect& StationRect::operator = (Rect src)
    00492 {
    00493   this->left = src.left;
    00494   this->top = src.top;
    00495   this->right = src.right;
    00496   this->bottom = src.bottom;
    00497   return *this;
    00498 }
    00499
    00500 TileArea::TileArea(TileIndex start, TileIndex end)
    00501 {
    00502   uint sx = TileX(start);
    00503   uint sy = TileY(start);
    00504   uint ex = TileX(end);
    00505   uint ey = TileY(end);
    00506
    00507   if (sx > ex) Swap(sx, ex);
    00508   if (sy > ey) Swap(sy, ey);
    00509
    00510   this->tile = TileXY(sx, sy);
    00511   this->w    = ex - sx + 1;
    00512   this->h    = ey - sy + 1;
    00513 }
    00514
    00515 void TileArea::Add(TileIndex to_add)
    00516 {
    00517   if (this->tile == INVALID_TILE) {
    00518     this->tile = to_add;
    00519     this->w = 1;
    00520     this->h = 1;
    00521     return;
    00522   }
    00523
    00524   uint sx = TileX(this->tile);
    00525   uint sy = TileY(this->tile);
    00526   uint ex = sx + this->w - 1;
    00527   uint ey = sy + this->h - 1;
    00528
    00529   uint ax = TileX(to_add);
    00530   uint ay = TileY(to_add);
    00531
    00532   sx = min(ax, sx);
    00533   sy = min(ay, sy);
    00534   ex = max(ax, ex);
    00535   ey = max(ay, ey);
    00536
    00537   this->tile = TileXY(sx, sy);
    00538   this->w    = ex - sx + 1;
    00539   this->h    = ey - sy + 1;
    00540 }
    00541
    00542 bool TileArea::Intersects(const TileArea &ta) const
    00543 {
    00544   if (ta.w == 0 || this->w == 0) return false;
    00545
    00546   assert(ta.w != 0 && ta.h != 0 && this->w != 0 && this->h != 0);
    00547
    00548   uint left1   = TileX(this->tile);
    00549   uint top1    = TileY(this->tile);
    00550   uint right1  = left1 + this->w - 1;
    00551   uint bottom1 = top1  + this->h - 1;
    00552
    00553   uint left2   = TileX(ta.tile);
    00554   uint top2    = TileY(ta.tile);
    00555   uint right2  = left2 + ta.w - 1;
    00556   uint bottom2 = top2  + ta.h - 1;
    00557
    00558   return !(
    00559       left2   > right1  ||
    00560       right2  < left1   ||
    00561       top2    > bottom1 ||
    00562       bottom2 < top1
    00563     );
    00564 }
    00565
    00566
    00567 void InitializeStations()
    00568 {
    00569   _station_pool.CleanPool();
    00570 }