00001
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
00069 if (base >= _engine_counts[type]) {
00070
00071 this->info.climates = 0x80;
00072
00073 this->info.base_life = 0xFF;
00074 return;
00075 }
00076
00077
00078 this->info = _orig_engine_info[_engine_offsets[type] + base];
00079
00080
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
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
00158
00159
00160
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
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
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
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
00332 Company *c;
00333 FOR_ALL_COMPANIES(c) {
00334 free(c->num_engines);
00335 c->num_engines = CallocT<EngineID>(engines);
00336 }
00337
00338
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
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
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
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
00407
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
00414
00415 e->company_avail = 0;
00416 e->reliability = e->reliability_final;
00417
00418 AddRemoveEngineFromAutoreplaceAndBuildWindows(e->type);
00419 }
00420 InvalidateWindowClasses(WC_BUILD_VEHICLE);
00421 InvalidateWindowClasses(WC_REPLACE_VEHICLE);
00422 }
00423
00424 void SetYearEngineAgingStops()
00425 {
00426
00427 _year_engine_aging_stops = 2050;
00428
00429 const Engine *e;
00430 FOR_ALL_ENGINES(e) {
00431 const EngineInfo *ei = &e->info;
00432
00433
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
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
00455
00456
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
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
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
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
00613
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
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
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
00640 e->company_avail = (CompanyMask)-1;
00641
00642
00643 if (IsWagon(index)) return;
00644
00645 if (e->type == VEH_TRAIN) {
00646
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
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
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
00675 NewVehicleAvailable(e);
00676 } else if (!(e->flags & (ENGINE_AVAILABLE|ENGINE_EXCLUSIVE_PREVIEW)) && _date >= e->intro_date) {
00677
00678 e->flags |= ENGINE_EXCLUSIVE_PREVIEW;
00679
00680
00681 if (!IsWagon(e->index))
00682 e->preview_company_rank = 1;
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
00743 if (!IsEngineIndex(engine)) return false;
00744
00745 const Engine *e = GetEngine(engine);
00746
00747
00748 if (e->type != type) return false;
00749
00750
00751 if (!HasBit(e->company_avail, company)) return false;
00752
00753 if (type == VEH_TRAIN) {
00754
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
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
00783
00784 if (HasBit(ei->callbackmask, CBM_VEHICLE_CARGO_SUFFIX)) return true;
00785
00786
00787 CargoID default_cargo = e->GetDefaultCargoType();
00788 return default_cargo != CT_INVALID && ei->refit_mask != 1U << default_cargo;
00789 }