engine.cpp

Go to the documentation of this file.
00001 /* $Id: engine.cpp 15645 2009-03-08 16:51:08Z frosch $ */
00002 
00005 #include "stdafx.h"
00006 #include "debug.h"
00007 #include "company_func.h"
00008 #include "command_func.h"
00009 #include "news_func.h"
00010 #include "variables.h"
00011 #include "aircraft.h"
00012 #include "newgrf_engine.h"
00013 #include "group.h"
00014 #include "strings_func.h"
00015 #include "gfx_func.h"
00016 #include "core/random_func.hpp"
00017 #include "window_func.h"
00018 #include "date_func.h"
00019 #include "autoreplace_gui.h"
00020 #include "string_func.h"
00021 #include "oldpool_func.h"
00022 #include "ai/ai.hpp"
00023 #include "vehicle_func.h"
00024 #include "settings_type.h"
00025 
00026 #include "table/strings.h"
00027 #include "table/engines.h"
00028 
00029 DEFINE_OLD_POOL_GENERIC(Engine, Engine)
00030 
00031 EngineOverrideManager _engine_mngr;
00032 
00035 Year _year_engine_aging_stops;
00036 
00038 const uint8 _engine_counts[4] = {
00039   lengthof(_orig_rail_vehicle_info),
00040   lengthof(_orig_road_vehicle_info),
00041   lengthof(_orig_ship_vehicle_info),
00042   lengthof(_orig_aircraft_vehicle_info),
00043 };
00044 
00046 const uint8 _engine_offsets[4] = {
00047   0,
00048   lengthof(_orig_rail_vehicle_info),
00049   lengthof(_orig_rail_vehicle_info) + lengthof(_orig_road_vehicle_info),
00050   lengthof(_orig_rail_vehicle_info) + lengthof(_orig_road_vehicle_info) + lengthof(_orig_ship_vehicle_info),
00051 };
00052 
00053 const uint EngineOverrideManager::NUM_DEFAULT_ENGINES = _engine_counts[VEH_TRAIN] + _engine_counts[VEH_ROAD] + _engine_counts[VEH_SHIP] + _engine_counts[VEH_AIRCRAFT];
00054 
00055 Engine::Engine() :
00056   name(NULL),
00057   overrides_count(0),
00058   overrides(NULL)
00059 {
00060 }
00061 
00062 Engine::Engine(VehicleType type, EngineID base)
00063 {
00064   this->type = type;
00065   this->internal_id = base;
00066   this->list_position = base;
00067 
00068   /* Check if this base engine is within the original engine data range */
00069   if (base >= _engine_counts[type]) {
00070     /* Mark engine as valid anyway */
00071     this->info.climates = 0x80;
00072     /* Set model life to maximum to make wagons available */
00073     this->info.base_life = 0xFF;
00074     return;
00075   }
00076 
00077   /* Copy the original engine info for this slot */
00078   this->info = _orig_engine_info[_engine_offsets[type] + base];
00079 
00080   /* Copy the original engine data for this slot */
00081   switch (type) {
00082     default: NOT_REACHED();
00083 
00084     case VEH_TRAIN:
00085       this->u.rail = _orig_rail_vehicle_info[base];
00086       this->image_index = this->u.rail.image_index;
00087       this->info.string_id = STR_8000_KIRBY_PAUL_TANK_STEAM + base;
00088 
00089       /* Set the default model life of original wagons to "infinite" */
00090       if (this->u.rail.railveh_type == RAILVEH_WAGON) this->info.base_life = 0xFF;
00091 
00092       break;
00093 
00094     case VEH_ROAD:
00095       this->u.road = _orig_road_vehicle_info[base];
00096       this->image_index = this->u.road.image_index;
00097       this->info.string_id = STR_8074_MPS_REGAL_BUS + base;
00098       break;
00099 
00100     case VEH_SHIP:
00101       this->u.ship = _orig_ship_vehicle_info[base];
00102       this->image_index = this->u.ship.image_index;
00103       this->info.string_id = STR_80CC_MPS_OIL_TANKER + base;
00104       break;
00105 
00106     case VEH_AIRCRAFT:
00107       this->u.air = _orig_aircraft_vehicle_info[base];
00108       this->image_index = this->u.air.image_index;
00109       this->info.string_id = STR_80D7_SAMPSON_U52 + base;
00110       break;
00111   }
00112 }
00113 
00114 Engine::~Engine()
00115 {
00116   UnloadWagonOverrides(this);
00117   free(this->name);
00118 }
00119 
00131 CargoID Engine::GetDefaultCargoType() const
00132 {
00133   switch (this->type) {
00134     case VEH_TRAIN:
00135       return this->u.rail.cargo_type;
00136 
00137     case VEH_ROAD:
00138       return this->u.road.cargo_type;
00139 
00140     case VEH_SHIP:
00141       return this->u.ship.cargo_type;
00142 
00143     case VEH_AIRCRAFT:
00144       return FindFirstRefittableCargo(this->index);
00145 
00146     default: NOT_REACHED();
00147   }
00148 }
00149 
00155 bool Engine::CanCarryCargo() const
00156 {
00157   /* For engines that can appear in a consist (i.e. rail vehicles and (articulated) road vehicles), a capacity
00158    * of zero is a special case, to define the vehicle to not carry anything. The default cargotype is still used
00159    * for livery selection etc.
00160    * Note: Only the property is tested. A capacity callback returning 0 does not have the same effect.
00161    */
00162   switch (this->type) {
00163     case VEH_TRAIN:
00164       if (this->u.rail.capacity == 0) return false;
00165       break;
00166 
00167     case VEH_ROAD:
00168       if (this->u.road.capacity == 0) return false;
00169       break;
00170 
00171     case VEH_SHIP:
00172     case VEH_AIRCRAFT:
00173       break;
00174 
00175     default: NOT_REACHED();
00176   }
00177   return this->GetDefaultCargoType() != CT_INVALID;
00178 }
00179 
00180 Money Engine::GetRunningCost() const
00181 {
00182   switch (this->type) {
00183     case VEH_ROAD:
00184       return this->u.road.running_cost * GetPriceByIndex(this->u.road.running_cost_class) >> 8;
00185 
00186     case VEH_TRAIN:
00187       return GetEngineProperty(this->index, 0x0D, this->u.rail.running_cost) * GetPriceByIndex(this->u.rail.running_cost_class) >> 8;
00188 
00189     case VEH_SHIP:
00190       return GetEngineProperty(this->index, 0x0F, this->u.ship.running_cost) * _price.ship_running >> 8;
00191 
00192     case VEH_AIRCRAFT:
00193       return GetEngineProperty(this->index, 0x0E, this->u.air.running_cost) * _price.aircraft_running >> 8;
00194 
00195     default: NOT_REACHED();
00196   }
00197 }
00198 
00199 Money Engine::GetCost() const
00200 {
00201   switch (this->type) {
00202     case VEH_ROAD:
00203       return GetEngineProperty(this->index, 0x11, this->u.road.cost_factor) * (_price.roadveh_base >> 3) >> 5;
00204 
00205     case VEH_TRAIN:
00206       if (this->u.rail.railveh_type == RAILVEH_WAGON) {
00207         return (GetEngineProperty(this->index, 0x17, this->u.rail.cost_factor) * _price.build_railwagon) >> 8;
00208       } else {
00209         return GetEngineProperty(this->index, 0x17, this->u.rail.cost_factor) * (_price.build_railvehicle >> 3) >> 5;
00210       }
00211     case VEH_SHIP:
00212       return GetEngineProperty(this->index, 0x0A, this->u.ship.cost_factor) * (_price.ship_base >> 3) >> 5;
00213 
00214     case VEH_AIRCRAFT:
00215       return GetEngineProperty(this->index, 0x0B, this->u.air.cost_factor) * (_price.aircraft_base >> 3) >> 5;
00216 
00217     default: NOT_REACHED();
00218   }
00219 }
00220 
00225 uint Engine::GetDisplayMaxSpeed() const
00226 {
00227   switch (this->type) {
00228     case VEH_TRAIN:
00229       return GetEngineProperty(this->index, 0x09, this->u.rail.max_speed);
00230 
00231     case VEH_ROAD:
00232       return this->u.road.max_speed / 2;
00233 
00234     case VEH_SHIP:
00235       return GetEngineProperty(this->index, 0x0B, this->u.ship.max_speed) / 2;
00236 
00237     case VEH_AIRCRAFT:
00238       return this->u.air.max_speed;
00239 
00240     default: NOT_REACHED();
00241   }
00242 }
00243 
00244 uint Engine::GetPower() const
00245 {
00246   /* Currently only trains have 'power' */
00247   switch (this->type) {
00248     case VEH_TRAIN:
00249       return GetEngineProperty(this->index, 0x0B, this->u.rail.power);
00250 
00251     default: NOT_REACHED();
00252   }
00253 }
00254 
00260 uint Engine::GetDisplayWeight() const
00261 {
00262   /* Currently only trains have 'weight' */
00263   switch (this->type) {
00264     case VEH_TRAIN:
00265       return GetEngineProperty(this->index, 0x16, this->u.rail.weight) << (this->u.rail.railveh_type == RAILVEH_MULTIHEAD ? 1 : 0);
00266 
00267     default: NOT_REACHED();
00268   }
00269 }
00270 
00276 uint Engine::GetDisplayMaxTractiveEffort() const
00277 {
00278   /* Currently only trains have 'tractive effort' */
00279   switch (this->type) {
00280     case VEH_TRAIN:
00281       return (10 * this->GetDisplayWeight() * GetEngineProperty(this->index, 0x1F, this->u.rail.tractive_effort)) / 256;
00282 
00283     default: NOT_REACHED();
00284   }
00285 }
00286 
00290 void EngineOverrideManager::ResetToDefaultMapping()
00291 {
00292   this->Clear();
00293   for (VehicleType type = VEH_TRAIN; type <= VEH_AIRCRAFT; type++) {
00294     for (uint internal_id = 0; internal_id < _engine_counts[type]; internal_id++) {
00295       EngineIDMapping *eid = this->Append();
00296       eid->type            = type;
00297       eid->grfid           = INVALID_GRFID;
00298       eid->internal_id     = internal_id;
00299       eid->substitute_id   = internal_id;
00300     }
00301   }
00302 }
00303 
00313 EngineID EngineOverrideManager::GetID(VehicleType type, uint16 grf_local_id, uint32 grfid)
00314 {
00315   const EngineIDMapping *end = this->End();
00316   EngineID index = 0;
00317   for (const EngineIDMapping *eid = this->Begin(); eid != end; eid++, index++) {
00318     if (eid->type == type && eid->grfid == grfid && eid->internal_id == grf_local_id) {
00319       return index;
00320     }
00321   }
00322   return INVALID_ENGINE;
00323 }
00324 
00327 void SetCachedEngineCounts()
00328 {
00329   uint engines = GetEnginePoolSize();
00330 
00331   /* Set up the engine count for all companies */
00332   Company *c;
00333   FOR_ALL_COMPANIES(c) {
00334     free(c->num_engines);
00335     c->num_engines = CallocT<EngineID>(engines);
00336   }
00337 
00338   /* Recalculate */
00339   Group *g;
00340   FOR_ALL_GROUPS(g) {
00341     free(g->num_engines);
00342     g->num_engines = CallocT<EngineID>(engines);
00343   }
00344 
00345   const Vehicle *v;
00346   FOR_ALL_VEHICLES(v) {
00347     if (!IsEngineCountable(v)) continue;
00348 
00349     assert(v->engine_type < engines);
00350 
00351     GetCompany(v->owner)->num_engines[v->engine_type]++;
00352 
00353     if (v->group_id == DEFAULT_GROUP) continue;
00354 
00355     g = GetGroup(v->group_id);
00356     assert(v->type == g->vehicle_type);
00357     assert(v->owner == g->owner);
00358 
00359     g->num_engines[v->engine_type]++;
00360   }
00361 }
00362 
00363 void SetupEngines()
00364 {
00365   _Engine_pool.CleanPool();
00366   _Engine_pool.AddBlockToPool();
00367 
00368   assert(_engine_mngr.Length() >= _engine_mngr.NUM_DEFAULT_ENGINES);
00369   const EngineIDMapping *end = _engine_mngr.End();
00370   uint index = 0;
00371   for (const EngineIDMapping *eid = _engine_mngr.Begin(); eid != end; eid++, index++) {
00372     const Engine *e = new Engine(eid->type, eid->internal_id);
00373     assert(e->index == index);
00374   }
00375 }
00376 
00377 
00378 void ShowEnginePreviewWindow(EngineID engine);
00379 
00380 /* Determine if an engine type is a wagon (and not a loco) */
00381 static bool IsWagon(EngineID index)
00382 {
00383   const Engine *e = GetEngine(index);
00384   return e->type == VEH_TRAIN && e->u.rail.railveh_type == RAILVEH_WAGON;
00385 }
00386 
00387 static void CalcEngineReliability(Engine *e)
00388 {
00389   uint age = e->age;
00390 
00391   /* Check for early retirement */
00392   if (e->company_avail != 0 && !_settings_game.vehicle.never_expire_vehicles && e->info.base_life != 0xFF) {
00393     int retire_early = e->info.retire_early;
00394     uint retire_early_max_age = max(0, e->duration_phase_1 + e->duration_phase_2 - retire_early * 12);
00395     if (retire_early != 0 && age >= retire_early_max_age) {
00396       /* Early retirement is enabled and we're past the date... */
00397       e->company_avail = 0;
00398       AddRemoveEngineFromAutoreplaceAndBuildWindows(e->type);
00399     }
00400   }
00401 
00402   if (age < e->duration_phase_1) {
00403     uint start = e->reliability_start;
00404     e->reliability = age * (e->reliability_max - start) / e->duration_phase_1 + start;
00405   } else if ((age -= e->duration_phase_1) < e->duration_phase_2 || _settings_game.vehicle.never_expire_vehicles || e->info.base_life == 0xFF) {
00406     /* We are at the peak of this engines life. It will have max reliability.
00407      * This is also true if the engines never expire. They will not go bad over time */
00408     e->reliability = e->reliability_max;
00409   } else if ((age -= e->duration_phase_2) < e->duration_phase_3) {
00410     uint max = e->reliability_max;
00411     e->reliability = (int)age * (int)(e->reliability_final - max) / e->duration_phase_3 + max;
00412   } else {
00413     /* time's up for this engine.
00414      * We will now completely retire this design */
00415     e->company_avail = 0;
00416     e->reliability = e->reliability_final;
00417     /* Kick this engine out of the lists */
00418     AddRemoveEngineFromAutoreplaceAndBuildWindows(e->type);
00419   }
00420   InvalidateWindowClasses(WC_BUILD_VEHICLE); // Update to show the new reliability
00421   InvalidateWindowClasses(WC_REPLACE_VEHICLE);
00422 }
00423 
00424 void SetYearEngineAgingStops()
00425 {
00426   /* Determine last engine aging year, default to 2050 as previously. */
00427   _year_engine_aging_stops = 2050;
00428 
00429   const Engine *e;
00430   FOR_ALL_ENGINES(e) {
00431     const EngineInfo *ei = &e->info;
00432 
00433     /* Exclude certain engines */
00434     if (!HasBit(ei->climates, _settings_game.game_creation.landscape)) continue;
00435     if (e->type == VEH_TRAIN && e->u.rail.railveh_type == RAILVEH_WAGON) continue;
00436 
00437     /* Base year ending date on half the model life */
00438     YearMonthDay ymd;
00439     ConvertDateToYMD(ei->base_intro + (ei->lifelength * DAYS_IN_LEAP_YEAR) / 2, &ymd);
00440 
00441     _year_engine_aging_stops = max(_year_engine_aging_stops, ymd.year);
00442   }
00443 }
00444 
00445 void StartupOneEngine(Engine *e, Date aging_date)
00446 {
00447   const EngineInfo *ei = &e->info;
00448   uint32 r;
00449 
00450   e->age = 0;
00451   e->flags = 0;
00452   e->company_avail = 0;
00453 
00454   /* The magic value of 729 days below comes from the NewGRF spec. If the
00455    * base intro date is before 1922 then the random number of days is not
00456    * added. */
00457   r = Random();
00458   e->intro_date = ei->base_intro <= ConvertYMDToDate(1922, 0, 1) ? ei->base_intro : (Date)GB(r, 0, 9) + ei->base_intro;
00459   if (e->intro_date <= _date) {
00460     e->age = (aging_date - e->intro_date) >> 5;
00461     e->company_avail = (CompanyMask)-1;
00462     e->flags |= ENGINE_AVAILABLE;
00463   }
00464 
00465   e->reliability_start = GB(r, 16, 14) + 0x7AE0;
00466   r = Random();
00467   e->reliability_max   = GB(r,  0, 14) + 0xBFFF;
00468   e->reliability_final = GB(r, 16, 14) + 0x3FFF;
00469 
00470   r = Random();
00471   e->duration_phase_1 = GB(r, 0, 5) + 7;
00472   e->duration_phase_2 = GB(r, 5, 4) + ei->base_life * 12 - 96;
00473   e->duration_phase_3 = GB(r, 9, 7) + 120;
00474 
00475   e->reliability_spd_dec = ei->decay_speed << 2;
00476 
00477   CalcEngineReliability(e);
00478 
00479   e->lifelength = ei->lifelength + _settings_game.vehicle.extend_vehicle_life;
00480 
00481   /* prevent certain engines from ever appearing. */
00482   if (!HasBit(ei->climates, _settings_game.game_creation.landscape)) {
00483     e->flags |= ENGINE_AVAILABLE;
00484     e->company_avail = 0;
00485   }
00486 }
00487 
00488 void StartupEngines()
00489 {
00490   Engine *e;
00491   /* Aging of vehicles stops, so account for that when starting late */
00492   const Date aging_date = min(_date, ConvertYMDToDate(_year_engine_aging_stops, 0, 1));
00493 
00494   FOR_ALL_ENGINES(e) {
00495     StartupOneEngine(e, aging_date);
00496   }
00497 
00498   /* Update the bitmasks for the vehicle lists */
00499   Company *c;
00500   FOR_ALL_COMPANIES(c) {
00501     c->avail_railtypes = GetCompanyRailtypes(c->index);
00502     c->avail_roadtypes = GetCompanyRoadtypes(c->index);
00503   }
00504 }
00505 
00506 static void AcceptEnginePreview(EngineID eid, CompanyID company)
00507 {
00508   Engine *e = GetEngine(eid);
00509   Company *c = GetCompany(company);
00510 
00511   SetBit(e->company_avail, company);
00512   if (e->type == VEH_TRAIN) {
00513     const RailVehicleInfo *rvi = RailVehInfo(eid);
00514 
00515     assert(rvi->railtype < RAILTYPE_END);
00516     SetBit(c->avail_railtypes, rvi->railtype);
00517   } else if (e->type == VEH_ROAD) {
00518     SetBit(c->avail_roadtypes, HasBit(EngInfo(eid)->misc_flags, EF_ROAD_TRAM) ? ROADTYPE_TRAM : ROADTYPE_ROAD);
00519   }
00520 
00521   e->preview_company_rank = 0xFF;
00522   if (company == _local_company) {
00523     AddRemoveEngineFromAutoreplaceAndBuildWindows(e->type);
00524   }
00525 }
00526 
00527 static CompanyID GetBestCompany(uint8 pp)
00528 {
00529   const Company *c;
00530   int32 best_hist;
00531   CompanyID best_company;
00532   CompanyMask mask = 0;
00533 
00534   do {
00535     best_hist = -1;
00536     best_company = INVALID_COMPANY;
00537     FOR_ALL_COMPANIES(c) {
00538       if (c->block_preview == 0 && !HasBit(mask, c->index) &&
00539           c->old_economy[0].performance_history > best_hist) {
00540         best_hist = c->old_economy[0].performance_history;
00541         best_company = c->index;
00542       }
00543     }
00544 
00545     if (best_company == INVALID_COMPANY) return INVALID_COMPANY;
00546 
00547     SetBit(mask, best_company);
00548   } while (--pp != 0);
00549 
00550   return best_company;
00551 }
00552 
00553 void EnginesDailyLoop()
00554 {
00555   if (_cur_year >= _year_engine_aging_stops) return;
00556 
00557   Engine *e;
00558   FOR_ALL_ENGINES(e) {
00559     EngineID i = e->index;
00560     if (e->flags & ENGINE_EXCLUSIVE_PREVIEW) {
00561       if (e->flags & ENGINE_OFFER_WINDOW_OPEN) {
00562         if (e->preview_company_rank != 0xFF && !--e->preview_wait) {
00563           e->flags &= ~ENGINE_OFFER_WINDOW_OPEN;
00564           DeleteWindowById(WC_ENGINE_PREVIEW, i);
00565           e->preview_company_rank++;
00566         }
00567       } else if (e->preview_company_rank != 0xFF) {
00568         CompanyID best_company = GetBestCompany(e->preview_company_rank);
00569 
00570         if (best_company == INVALID_COMPANY) {
00571           e->preview_company_rank = 0xFF;
00572           continue;
00573         }
00574 
00575         e->flags |= ENGINE_OFFER_WINDOW_OPEN;
00576         e->preview_wait = 20;
00577         AI::NewEvent(best_company, new AIEventEnginePreview(i));
00578         if (IsInteractiveCompany(best_company)) ShowEnginePreviewWindow(i);
00579       }
00580     }
00581   }
00582 }
00583 
00591 CommandCost CmdWantEnginePreview(TileIndex tile, DoCommandFlag flags, uint32 p1, uint32 p2, const char *text)
00592 {
00593   Engine *e;
00594 
00595   if (!IsEngineIndex(p1)) return CMD_ERROR;
00596   e = GetEngine(p1);
00597   if (GetBestCompany(e->preview_company_rank) != _current_company) return CMD_ERROR;
00598 
00599   if (flags & DC_EXEC) AcceptEnginePreview(p1, _current_company);
00600 
00601   return CommandCost();
00602 }
00603 
00604 StringID GetEngineCategoryName(EngineID engine);
00605 
00606 static void NewVehicleAvailable(Engine *e)
00607 {
00608   Vehicle *v;
00609   Company *c;
00610   EngineID index = e->index;
00611 
00612   /* In case the company didn't build the vehicle during the intro period,
00613    * prevent that company from getting future intro periods for a while. */
00614   if (e->flags & ENGINE_EXCLUSIVE_PREVIEW) {
00615     FOR_ALL_COMPANIES(c) {
00616       uint block_preview = c->block_preview;
00617 
00618       if (!HasBit(e->company_avail, c->index)) continue;
00619 
00620       /* We assume the user did NOT build it.. prove me wrong ;) */
00621       c->block_preview = 20;
00622 
00623       FOR_ALL_VEHICLES(v) {
00624         if (v->type == VEH_TRAIN || v->type == VEH_ROAD || v->type == VEH_SHIP ||
00625             (v->type == VEH_AIRCRAFT && IsNormalAircraft(v))) {
00626           if (v->owner == c->index && v->engine_type == index) {
00627             /* The user did prove me wrong, so restore old value */
00628             c->block_preview = block_preview;
00629             break;
00630           }
00631         }
00632       }
00633     }
00634   }
00635 
00636   e->flags = (e->flags & ~ENGINE_EXCLUSIVE_PREVIEW) | ENGINE_AVAILABLE;
00637   AddRemoveEngineFromAutoreplaceAndBuildWindows(e->type);
00638 
00639   /* Now available for all companies */
00640   e->company_avail = (CompanyMask)-1;
00641 
00642   /* Do not introduce new rail wagons */
00643   if (IsWagon(index)) return;
00644 
00645   if (e->type == VEH_TRAIN) {
00646     /* maybe make another rail type available */
00647     RailType railtype = e->u.rail.railtype;
00648     assert(railtype < RAILTYPE_END);
00649     FOR_ALL_COMPANIES(c) SetBit(c->avail_railtypes, railtype);
00650   } else if (e->type == VEH_ROAD) {
00651     /* maybe make another road type available */
00652     FOR_ALL_COMPANIES(c) SetBit(c->avail_roadtypes, HasBit(e->info.misc_flags, EF_ROAD_TRAM) ? ROADTYPE_TRAM : ROADTYPE_ROAD);
00653   }
00654 
00655   AI::BroadcastNewEvent(new AIEventEngineAvailable(index));
00656 
00657   SetDParam(0, GetEngineCategoryName(index));
00658   SetDParam(1, index);
00659   AddNewsItem(STR_NEW_VEHICLE_NOW_AVAILABLE_WITH_TYPE, NS_NEW_VEHICLES, index, 0);
00660 }
00661 
00662 void EnginesMonthlyLoop()
00663 {
00664   if (_cur_year < _year_engine_aging_stops) {
00665     Engine *e;
00666     FOR_ALL_ENGINES(e) {
00667       /* Age the vehicle */
00668       if (e->flags & ENGINE_AVAILABLE && e->age != 0xFFFF) {
00669         e->age++;
00670         CalcEngineReliability(e);
00671       }
00672 
00673       if (!(e->flags & ENGINE_AVAILABLE) && _date >= (e->intro_date + DAYS_IN_YEAR)) {
00674         /* Introduce it to all companies */
00675         NewVehicleAvailable(e);
00676       } else if (!(e->flags & (ENGINE_AVAILABLE|ENGINE_EXCLUSIVE_PREVIEW)) && _date >= e->intro_date) {
00677         /* Introduction date has passed.. show introducing dialog to one companies. */
00678         e->flags |= ENGINE_EXCLUSIVE_PREVIEW;
00679 
00680         /* Do not introduce new rail wagons */
00681         if (!IsWagon(e->index))
00682           e->preview_company_rank = 1; // Give to the company with the highest rating.
00683       }
00684     }
00685   }
00686 }
00687 
00688 static bool IsUniqueEngineName(const char *name)
00689 {
00690   const Engine *e;
00691 
00692   FOR_ALL_ENGINES(e) {
00693     if (e->name != NULL && strcmp(e->name, name) == 0) return false;
00694   }
00695 
00696   return true;
00697 }
00698 
00705 CommandCost CmdRenameEngine(TileIndex tile, DoCommandFlag flags, uint32 p1, uint32 p2, const char *text)
00706 {
00707   if (!IsEngineIndex(p1)) return CMD_ERROR;
00708 
00709   bool reset = StrEmpty(text);
00710 
00711   if (!reset) {
00712     if (strlen(text) >= MAX_LENGTH_ENGINE_NAME_BYTES) return CMD_ERROR;
00713     if (!IsUniqueEngineName(text)) return_cmd_error(STR_NAME_MUST_BE_UNIQUE);
00714   }
00715 
00716   if (flags & DC_EXEC) {
00717     Engine *e = GetEngine(p1);
00718     free(e->name);
00719 
00720     if (reset) {
00721       e->name = NULL;
00722     } else {
00723       e->name = strdup(text);
00724     }
00725 
00726     MarkWholeScreenDirty();
00727   }
00728 
00729   return CommandCost();
00730 }
00731 
00732 
00740 bool IsEngineBuildable(EngineID engine, VehicleType type, CompanyID company)
00741 {
00742   /* check if it's an engine that is in the engine array */
00743   if (!IsEngineIndex(engine)) return false;
00744 
00745   const Engine *e = GetEngine(engine);
00746 
00747   /* check if it's an engine of specified type */
00748   if (e->type != type) return false;
00749 
00750   /* check if it's available */
00751   if (!HasBit(e->company_avail, company)) return false;
00752 
00753   if (type == VEH_TRAIN) {
00754     /* Check if the rail type is available to this company */
00755     const Company *c = GetCompany(company);
00756     if (!HasBit(c->avail_railtypes, RailVehInfo(engine)->railtype)) return false;
00757   }
00758 
00759   return true;
00760 }
00761 
00768 bool IsEngineRefittable(EngineID engine)
00769 {
00770   /* check if it's an engine that is in the engine array */
00771   if (!IsEngineIndex(engine)) return false;
00772 
00773   const Engine *e = GetEngine(engine);
00774 
00775   if (e->type == VEH_SHIP && !e->u.ship.refittable) return false;
00776 
00777   if (!e->CanCarryCargo()) return false;
00778 
00779   const EngineInfo *ei = &e->info;
00780   if (ei->refit_mask == 0) return false;
00781 
00782   /* Are there suffixes?
00783    * Note: This does not mean the suffixes are actually available for every consist at any time. */
00784   if (HasBit(ei->callbackmask, CBM_VEHICLE_CARGO_SUFFIX)) return true;
00785 
00786   /* Is there any cargo except the default cargo? */
00787   CargoID default_cargo = e->GetDefaultCargoType();
00788   return default_cargo != CT_INVALID && ei->refit_mask != 1U << default_cargo;
00789 }

Generated on Mon Mar 9 23:33:47 2009 for openttd by  doxygen 1.5.6