OpenTTD
engine.cpp
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1 /* $Id: engine.cpp 27700 2016-12-20 12:35:36Z frosch $ */
2 
3 /*
4  * This file is part of OpenTTD.
5  * 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.
6  * 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.
7  * 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/>.
8  */
9 
12 #include "stdafx.h"
13 #include "company_func.h"
14 #include "command_func.h"
15 #include "news_func.h"
16 #include "aircraft.h"
17 #include "newgrf.h"
18 #include "newgrf_engine.h"
19 #include "strings_func.h"
20 #include "core/random_func.hpp"
21 #include "window_func.h"
22 #include "date_func.h"
23 #include "autoreplace_gui.h"
24 #include "string_func.h"
25 #include "ai/ai.hpp"
26 #include "core/pool_func.hpp"
27 #include "engine_gui.h"
28 #include "engine_func.h"
29 #include "engine_base.h"
30 #include "company_base.h"
31 #include "vehicle_func.h"
32 #include "articulated_vehicles.h"
33 #include "error.h"
34 
35 #include "table/strings.h"
36 #include "table/engines.h"
37 
38 #include "safeguards.h"
39 
40 EnginePool _engine_pool("Engine");
42 
43 EngineOverrideManager _engine_mngr;
44 
50 
52 const uint8 _engine_counts[4] = {
53  lengthof(_orig_rail_vehicle_info),
54  lengthof(_orig_road_vehicle_info),
55  lengthof(_orig_ship_vehicle_info),
56  lengthof(_orig_aircraft_vehicle_info),
57 };
58 
60 const uint8 _engine_offsets[4] = {
61  0,
62  lengthof(_orig_rail_vehicle_info),
63  lengthof(_orig_rail_vehicle_info) + lengthof(_orig_road_vehicle_info),
64  lengthof(_orig_rail_vehicle_info) + lengthof(_orig_road_vehicle_info) + lengthof(_orig_ship_vehicle_info),
65 };
66 
67 assert_compile(lengthof(_orig_rail_vehicle_info) + lengthof(_orig_road_vehicle_info) + lengthof(_orig_ship_vehicle_info) + lengthof(_orig_aircraft_vehicle_info) == lengthof(_orig_engine_info));
68 
70 
71 Engine::Engine() :
72  name(NULL),
73  overrides_count(0),
74  overrides(NULL)
75 {
76 }
77 
78 Engine::Engine(VehicleType type, EngineID base)
79 {
80  this->type = type;
81  this->grf_prop.local_id = base;
82  this->list_position = base;
84 
85  /* Check if this base engine is within the original engine data range */
86  if (base >= _engine_counts[type]) {
87  /* Set model life to maximum to make wagons available */
88  this->info.base_life = 0xFF;
89  /* Set road vehicle tractive effort to the default value */
90  if (type == VEH_ROAD) this->u.road.tractive_effort = 0x4C;
91  /* Aircraft must have CT_INVALID as default, as there is no property */
92  if (type == VEH_AIRCRAFT) this->info.cargo_type = CT_INVALID;
93  /* Set visual effect to the default value */
94  switch (type) {
95  case VEH_TRAIN: this->u.rail.visual_effect = VE_DEFAULT; break;
96  case VEH_ROAD: this->u.road.visual_effect = VE_DEFAULT; break;
97  case VEH_SHIP: this->u.ship.visual_effect = VE_DEFAULT; break;
98  default: break; // The aircraft, disasters and especially visual effects have no NewGRF configured visual effects
99  }
100  /* Set cargo aging period to the default value. */
101  this->info.cargo_age_period = CARGO_AGING_TICKS;
102  return;
103  }
104 
105  /* Copy the original engine info for this slot */
106  this->info = _orig_engine_info[_engine_offsets[type] + base];
107 
108  /* Copy the original engine data for this slot */
109  switch (type) {
110  default: NOT_REACHED();
111 
112  case VEH_TRAIN:
113  this->u.rail = _orig_rail_vehicle_info[base];
114  this->original_image_index = this->u.rail.image_index;
115  this->info.string_id = STR_VEHICLE_NAME_TRAIN_ENGINE_RAIL_KIRBY_PAUL_TANK_STEAM + base;
116 
117  /* Set the default model life of original wagons to "infinite" */
118  if (this->u.rail.railveh_type == RAILVEH_WAGON) this->info.base_life = 0xFF;
119 
120  break;
121 
122  case VEH_ROAD:
123  this->u.road = _orig_road_vehicle_info[base];
124  this->original_image_index = this->u.road.image_index;
125  this->info.string_id = STR_VEHICLE_NAME_ROAD_VEHICLE_MPS_REGAL_BUS + base;
126  break;
127 
128  case VEH_SHIP:
129  this->u.ship = _orig_ship_vehicle_info[base];
130  this->original_image_index = this->u.ship.image_index;
131  this->info.string_id = STR_VEHICLE_NAME_SHIP_MPS_OIL_TANKER + base;
132  break;
133 
134  case VEH_AIRCRAFT:
135  this->u.air = _orig_aircraft_vehicle_info[base];
136  this->original_image_index = this->u.air.image_index;
137  this->info.string_id = STR_VEHICLE_NAME_AIRCRAFT_SAMPSON_U52 + base;
138  break;
139  }
140 }
141 
142 Engine::~Engine()
143 {
144  UnloadWagonOverrides(this);
145  free(this->name);
146 }
147 
152 bool Engine::IsEnabled() const
153 {
154  return this->info.string_id != STR_NEWGRF_INVALID_ENGINE && HasBit(this->info.climates, _settings_game.game_creation.landscape);
155 }
156 
162 uint32 Engine::GetGRFID() const
163 {
164  const GRFFile *file = this->GetGRF();
165  return file == NULL ? 0 : file->grfid;
166 }
167 
174 {
175  /* For engines that can appear in a consist (i.e. rail vehicles and (articulated) road vehicles), a capacity
176  * of zero is a special case, to define the vehicle to not carry anything. The default cargotype is still used
177  * for livery selection etc.
178  * Note: Only the property is tested. A capacity callback returning 0 does not have the same effect.
179  */
180  switch (this->type) {
181  case VEH_TRAIN:
182  if (this->u.rail.capacity == 0) return false;
183  break;
184 
185  case VEH_ROAD:
186  if (this->u.road.capacity == 0) return false;
187  break;
188 
189  case VEH_SHIP:
190  case VEH_AIRCRAFT:
191  break;
192 
193  default: NOT_REACHED();
194  }
195  return this->GetDefaultCargoType() != CT_INVALID;
196 }
197 
198 
206 uint Engine::DetermineCapacity(const Vehicle *v, uint16 *mail_capacity) const
207 {
208  assert(v == NULL || this->index == v->engine_type);
209  if (mail_capacity != NULL) *mail_capacity = 0;
210 
211  if (!this->CanCarryCargo()) return 0;
212 
213  bool new_multipliers = HasBit(this->info.misc_flags, EF_NO_DEFAULT_CARGO_MULTIPLIER);
214  CargoID default_cargo = this->GetDefaultCargoType();
215  CargoID cargo_type = (v != NULL) ? v->cargo_type : default_cargo;
216 
217  if (mail_capacity != NULL && this->type == VEH_AIRCRAFT && IsCargoInClass(cargo_type, CC_PASSENGERS)) {
218  *mail_capacity = GetEngineProperty(this->index, PROP_AIRCRAFT_MAIL_CAPACITY, this->u.air.mail_capacity, v);
219  }
220 
221  /* Check the refit capacity callback if we are not in the default configuration, or if we are using the new multiplier algorithm. */
223  (new_multipliers || default_cargo != cargo_type || (v != NULL && v->cargo_subtype != 0))) {
224  uint16 callback = GetVehicleCallback(CBID_VEHICLE_REFIT_CAPACITY, 0, 0, this->index, v);
225  if (callback != CALLBACK_FAILED) return callback;
226  }
227 
228  /* Get capacity according to property resp. CB */
229  uint capacity;
230  uint extra_mail_cap = 0;
231  switch (this->type) {
232  case VEH_TRAIN:
233  capacity = GetEngineProperty(this->index, PROP_TRAIN_CARGO_CAPACITY, this->u.rail.capacity, v);
234 
235  /* In purchase list add the capacity of the second head. Always use the plain property for this. */
236  if (v == NULL && this->u.rail.railveh_type == RAILVEH_MULTIHEAD) capacity += this->u.rail.capacity;
237  break;
238 
239  case VEH_ROAD:
240  capacity = GetEngineProperty(this->index, PROP_ROADVEH_CARGO_CAPACITY, this->u.road.capacity, v);
241  break;
242 
243  case VEH_SHIP:
244  capacity = GetEngineProperty(this->index, PROP_SHIP_CARGO_CAPACITY, this->u.ship.capacity, v);
245  break;
246 
247  case VEH_AIRCRAFT:
248  capacity = GetEngineProperty(this->index, PROP_AIRCRAFT_PASSENGER_CAPACITY, this->u.air.passenger_capacity, v);
249  if (!IsCargoInClass(cargo_type, CC_PASSENGERS)) {
250  extra_mail_cap = GetEngineProperty(this->index, PROP_AIRCRAFT_MAIL_CAPACITY, this->u.air.mail_capacity, v);
251  }
252  if (!new_multipliers && cargo_type == CT_MAIL) return capacity + extra_mail_cap;
253  default_cargo = CT_PASSENGERS; // Always use 'passengers' wrt. cargo multipliers
254  break;
255 
256  default: NOT_REACHED();
257  }
258 
259  if (!new_multipliers) {
260  /* Use the passenger multiplier for mail as well */
261  capacity += extra_mail_cap;
262  extra_mail_cap = 0;
263  }
264 
265  /* Apply multipliers depending on cargo- and vehicletype. */
266  if (new_multipliers || (this->type != VEH_SHIP && default_cargo != cargo_type)) {
267  uint16 default_multiplier = new_multipliers ? 0x100 : CargoSpec::Get(default_cargo)->multiplier;
268  uint16 cargo_multiplier = CargoSpec::Get(cargo_type)->multiplier;
269  capacity *= cargo_multiplier;
270  if (extra_mail_cap > 0) {
271  uint mail_multiplier = CargoSpec::Get(CT_MAIL)->multiplier;
272  capacity += (default_multiplier * extra_mail_cap * cargo_multiplier + mail_multiplier / 2) / mail_multiplier;
273  }
274  capacity = (capacity + default_multiplier / 2) / default_multiplier;
275  }
276 
277  return capacity;
278 }
279 
285 {
286  Price base_price;
287  uint cost_factor;
288  switch (this->type) {
289  case VEH_ROAD:
290  base_price = this->u.road.running_cost_class;
291  if (base_price == INVALID_PRICE) return 0;
292  cost_factor = GetEngineProperty(this->index, PROP_ROADVEH_RUNNING_COST_FACTOR, this->u.road.running_cost);
293  break;
294 
295  case VEH_TRAIN:
296  base_price = this->u.rail.running_cost_class;
297  if (base_price == INVALID_PRICE) return 0;
298  cost_factor = GetEngineProperty(this->index, PROP_TRAIN_RUNNING_COST_FACTOR, this->u.rail.running_cost);
299  break;
300 
301  case VEH_SHIP:
302  base_price = PR_RUNNING_SHIP;
303  cost_factor = GetEngineProperty(this->index, PROP_SHIP_RUNNING_COST_FACTOR, this->u.ship.running_cost);
304  break;
305 
306  case VEH_AIRCRAFT:
307  base_price = PR_RUNNING_AIRCRAFT;
308  cost_factor = GetEngineProperty(this->index, PROP_AIRCRAFT_RUNNING_COST_FACTOR, this->u.air.running_cost);
309  break;
310 
311  default: NOT_REACHED();
312  }
313 
314  return GetPrice(base_price, cost_factor, this->GetGRF(), -8);
315 }
316 
322 {
323  Price base_price;
324  uint cost_factor;
325  switch (this->type) {
326  case VEH_ROAD:
327  base_price = PR_BUILD_VEHICLE_ROAD;
328  cost_factor = GetEngineProperty(this->index, PROP_ROADVEH_COST_FACTOR, this->u.road.cost_factor);
329  break;
330 
331  case VEH_TRAIN:
332  if (this->u.rail.railveh_type == RAILVEH_WAGON) {
333  base_price = PR_BUILD_VEHICLE_WAGON;
334  cost_factor = GetEngineProperty(this->index, PROP_TRAIN_COST_FACTOR, this->u.rail.cost_factor);
335  } else {
336  base_price = PR_BUILD_VEHICLE_TRAIN;
337  cost_factor = GetEngineProperty(this->index, PROP_TRAIN_COST_FACTOR, this->u.rail.cost_factor);
338  }
339  break;
340 
341  case VEH_SHIP:
342  base_price = PR_BUILD_VEHICLE_SHIP;
343  cost_factor = GetEngineProperty(this->index, PROP_SHIP_COST_FACTOR, this->u.ship.cost_factor);
344  break;
345 
346  case VEH_AIRCRAFT:
347  base_price = PR_BUILD_VEHICLE_AIRCRAFT;
348  cost_factor = GetEngineProperty(this->index, PROP_AIRCRAFT_COST_FACTOR, this->u.air.cost_factor);
349  break;
350 
351  default: NOT_REACHED();
352  }
353 
354  return GetPrice(base_price, cost_factor, this->GetGRF(), -8);
355 }
356 
362 {
363  switch (this->type) {
364  case VEH_TRAIN:
365  return GetEngineProperty(this->index, PROP_TRAIN_SPEED, this->u.rail.max_speed);
366 
367  case VEH_ROAD: {
368  uint max_speed = GetEngineProperty(this->index, PROP_ROADVEH_SPEED, 0);
369  return (max_speed != 0) ? max_speed * 2 : this->u.road.max_speed / 2;
370  }
371 
372  case VEH_SHIP:
373  return GetEngineProperty(this->index, PROP_SHIP_SPEED, this->u.ship.max_speed) / 2;
374 
375  case VEH_AIRCRAFT: {
376  uint max_speed = GetEngineProperty(this->index, PROP_AIRCRAFT_SPEED, 0);
377  if (max_speed != 0) {
378  return (max_speed * 128) / 10;
379  }
380  return this->u.air.max_speed;
381  }
382 
383  default: NOT_REACHED();
384  }
385 }
386 
393 uint Engine::GetPower() const
394 {
395  /* Only trains and road vehicles have 'power'. */
396  switch (this->type) {
397  case VEH_TRAIN:
398  return GetEngineProperty(this->index, PROP_TRAIN_POWER, this->u.rail.power);
399  case VEH_ROAD:
400  return GetEngineProperty(this->index, PROP_ROADVEH_POWER, this->u.road.power) * 10;
401 
402  default: NOT_REACHED();
403  }
404 }
405 
412 {
413  /* Only trains and road vehicles have 'weight'. */
414  switch (this->type) {
415  case VEH_TRAIN:
416  return GetEngineProperty(this->index, PROP_TRAIN_WEIGHT, this->u.rail.weight) << (this->u.rail.railveh_type == RAILVEH_MULTIHEAD ? 1 : 0);
417  case VEH_ROAD:
418  return GetEngineProperty(this->index, PROP_ROADVEH_WEIGHT, this->u.road.weight) / 4;
419 
420  default: NOT_REACHED();
421  }
422 }
423 
430 {
431  /* Only trains and road vehicles have 'tractive effort'. */
432  switch (this->type) {
433  case VEH_TRAIN:
434  return (10 * this->GetDisplayWeight() * GetEngineProperty(this->index, PROP_TRAIN_TRACTIVE_EFFORT, this->u.rail.tractive_effort)) / 256;
435  case VEH_ROAD:
436  return (10 * this->GetDisplayWeight() * GetEngineProperty(this->index, PROP_ROADVEH_TRACTIVE_EFFORT, this->u.road.tractive_effort)) / 256;
437 
438  default: NOT_REACHED();
439  }
440 }
441 
447 {
448  /* Assume leap years; this gives the player a bit more than the given amount of years, but never less. */
450 }
451 
456 uint16 Engine::GetRange() const
457 {
458  switch (this->type) {
459  case VEH_AIRCRAFT:
460  return GetEngineProperty(this->index, PROP_AIRCRAFT_RANGE, this->u.air.max_range);
461 
462  default: NOT_REACHED();
463  }
464 }
465 
470 {
471  this->Clear();
472  for (VehicleType type = VEH_TRAIN; type <= VEH_AIRCRAFT; type++) {
473  for (uint internal_id = 0; internal_id < _engine_counts[type]; internal_id++) {
474  EngineIDMapping *eid = this->Append();
475  eid->type = type;
476  eid->grfid = INVALID_GRFID;
477  eid->internal_id = internal_id;
478  eid->substitute_id = internal_id;
479  }
480  }
481 }
482 
492 EngineID EngineOverrideManager::GetID(VehicleType type, uint16 grf_local_id, uint32 grfid)
493 {
494  const EngineIDMapping *end = this->End();
495  EngineID index = 0;
496  for (const EngineIDMapping *eid = this->Begin(); eid != end; eid++, index++) {
497  if (eid->type == type && eid->grfid == grfid && eid->internal_id == grf_local_id) {
498  return index;
499  }
500  }
501  return INVALID_ENGINE;
502 }
503 
510 {
511  const Vehicle *v;
512  FOR_ALL_VEHICLES(v) {
513  if (IsCompanyBuildableVehicleType(v)) return false;
514  }
515 
516  /* Reset the engines, they will get new EngineIDs */
517  _engine_mngr.ResetToDefaultMapping();
519 
520  return true;
521 }
522 
527 {
529  _engine_pool.CleanPool();
530 
531  assert(_engine_mngr.Length() >= _engine_mngr.NUM_DEFAULT_ENGINES);
532  const EngineIDMapping *end = _engine_mngr.End();
533  uint index = 0;
534  for (const EngineIDMapping *eid = _engine_mngr.Begin(); eid != end; eid++, index++) {
535  /* Assert is safe; there won't be more than 256 original vehicles
536  * in any case, and we just cleaned the pool. */
537  assert(Engine::CanAllocateItem());
538  const Engine *e = new Engine(eid->type, eid->internal_id);
539  assert(e->index == index);
540  }
541 }
542 
543 void ShowEnginePreviewWindow(EngineID engine);
544 
550 static bool IsWagon(EngineID index)
551 {
552  const Engine *e = Engine::Get(index);
553  return e->type == VEH_TRAIN && e->u.rail.railveh_type == RAILVEH_WAGON;
554 }
555 
561 {
562  uint age = e->age;
563 
564  /* Check for early retirement */
565  if (e->company_avail != 0 && !_settings_game.vehicle.never_expire_vehicles && e->info.base_life != 0xFF) {
566  int retire_early = e->info.retire_early;
567  uint retire_early_max_age = max(0, e->duration_phase_1 + e->duration_phase_2 - retire_early * 12);
568  if (retire_early != 0 && age >= retire_early_max_age) {
569  /* Early retirement is enabled and we're past the date... */
570  e->company_avail = 0;
572  }
573  }
574 
575  if (age < e->duration_phase_1) {
576  uint start = e->reliability_start;
577  e->reliability = age * (e->reliability_max - start) / e->duration_phase_1 + start;
578  } else if ((age -= e->duration_phase_1) < e->duration_phase_2 || _settings_game.vehicle.never_expire_vehicles || e->info.base_life == 0xFF) {
579  /* We are at the peak of this engines life. It will have max reliability.
580  * This is also true if the engines never expire. They will not go bad over time */
582  } else if ((age -= e->duration_phase_2) < e->duration_phase_3) {
583  uint max = e->reliability_max;
584  e->reliability = (int)age * (int)(e->reliability_final - max) / e->duration_phase_3 + max;
585  } else {
586  /* time's up for this engine.
587  * We will now completely retire this design */
588  e->company_avail = 0;
590  /* Kick this engine out of the lists */
592  }
593  SetWindowClassesDirty(WC_BUILD_VEHICLE); // Update to show the new reliability
595 }
596 
599 {
600  /* Determine last engine aging year, default to 2050 as previously. */
602 
603  const Engine *e;
604  FOR_ALL_ENGINES(e) {
605  const EngineInfo *ei = &e->info;
606 
607  /* Exclude certain engines */
609  if (e->type == VEH_TRAIN && e->u.rail.railveh_type == RAILVEH_WAGON) continue;
610 
611  /* Base year ending date on half the model life */
612  YearMonthDay ymd;
613  ConvertDateToYMD(ei->base_intro + (ei->lifelength * DAYS_IN_LEAP_YEAR) / 2, &ymd);
614 
616  }
617 }
618 
624 void StartupOneEngine(Engine *e, Date aging_date)
625 {
626  const EngineInfo *ei = &e->info;
627 
628  e->age = 0;
629  e->flags = 0;
630  e->company_avail = 0;
631  e->company_hidden = 0;
632 
633  /* Don't randomise the start-date in the first two years after gamestart to ensure availability
634  * of engines in early starting games.
635  * Note: TTDP uses fixed 1922 */
636  uint32 r = Random();
638  if (e->intro_date <= _date) {
639  e->age = (aging_date - e->intro_date) >> 5;
640  e->company_avail = (CompanyMask)-1;
641  e->flags |= ENGINE_AVAILABLE;
642  }
643 
644  e->reliability_start = GB(r, 16, 14) + 0x7AE0;
645  r = Random();
646  e->reliability_max = GB(r, 0, 14) + 0xBFFF;
647  e->reliability_final = GB(r, 16, 14) + 0x3FFF;
648 
649  r = Random();
650  e->duration_phase_1 = GB(r, 0, 5) + 7;
651  e->duration_phase_2 = GB(r, 5, 4) + ei->base_life * 12 - 96;
652  e->duration_phase_3 = GB(r, 9, 7) + 120;
653 
654  e->reliability_spd_dec = ei->decay_speed << 2;
655 
657 
658  /* prevent certain engines from ever appearing. */
660  e->flags |= ENGINE_AVAILABLE;
661  e->company_avail = 0;
662  }
663 }
664 
670 {
671  Engine *e;
672  /* Aging of vehicles stops, so account for that when starting late */
673  const Date aging_date = min(_date, ConvertYMDToDate(_year_engine_aging_stops, 0, 1));
674 
675  FOR_ALL_ENGINES(e) {
676  StartupOneEngine(e, aging_date);
677  }
678 
679  /* Update the bitmasks for the vehicle lists */
680  Company *c;
681  FOR_ALL_COMPANIES(c) {
684  }
685 
686  /* Invalidate any open purchase lists */
688 }
689 
695 static void AcceptEnginePreview(EngineID eid, CompanyID company)
696 {
697  Engine *e = Engine::Get(eid);
698  Company *c = Company::Get(company);
699 
700  SetBit(e->company_avail, company);
701  if (e->type == VEH_TRAIN) {
702  assert(e->u.rail.railtype < RAILTYPE_END);
704  } else if (e->type == VEH_ROAD) {
706  }
707 
709  e->preview_asked = (CompanyMask)-1;
710  if (company == _local_company) {
712  }
713 
714  /* Update the toolbar. */
717 
718  /* Notify preview window, that it might want to close.
719  * Note: We cannot directly close the window.
720  * In singleplayer this function is called from the preview window, so
721  * we have to use the GUI-scope scheduling of InvalidateWindowData.
722  */
724 }
725 
732 {
733  CompanyID best_company = INVALID_COMPANY;
734 
735  /* For trains the cargomask has no useful meaning, since you can attach other wagons */
736  uint32 cargomask = e->type != VEH_TRAIN ? GetUnionOfArticulatedRefitMasks(e->index, true) : (uint32)-1;
737 
738  int32 best_hist = -1;
739  const Company *c;
740  FOR_ALL_COMPANIES(c) {
741  if (c->block_preview == 0 && !HasBit(e->preview_asked, c->index) &&
742  c->old_economy[0].performance_history > best_hist) {
743 
744  /* Check whether the company uses similar vehicles */
745  Vehicle *v;
746  FOR_ALL_VEHICLES(v) {
747  if (v->owner != c->index || v->type != e->type) continue;
748  if (!v->GetEngine()->CanCarryCargo() || !HasBit(cargomask, v->cargo_type)) continue;
749 
750  best_hist = c->old_economy[0].performance_history;
751  best_company = c->index;
752  break;
753  }
754  }
755  }
756 
757  return best_company;
758 }
759 
767 static bool IsVehicleTypeDisabled(VehicleType type, bool ai)
768 {
769  switch (type) {
774 
775  default: NOT_REACHED();
776  }
777 }
778 
781 {
782  Company *c;
783  FOR_ALL_COMPANIES(c) {
785  }
786 
787  if (_cur_year >= _year_engine_aging_stops) return;
788 
789  Engine *e;
790  FOR_ALL_ENGINES(e) {
791  EngineID i = e->index;
792  if (e->flags & ENGINE_EXCLUSIVE_PREVIEW) {
793  if (e->preview_company != INVALID_COMPANY) {
794  if (!--e->preview_wait) {
797  }
798  } else if (CountBits(e->preview_asked) < MAX_COMPANIES) {
800 
801  if (e->preview_company == INVALID_COMPANY) {
802  e->preview_asked = (CompanyMask)-1;
803  continue;
804  }
805 
807  e->preview_wait = 20;
808  /* AIs are intentionally not skipped for preview even if they cannot build a certain
809  * vehicle type. This is done to not give poor performing human companies an "unfair"
810  * boost that they wouldn't have gotten against other human companies. The check on
811  * the line below is just to make AIs not notice that they have a preview if they
812  * cannot build the vehicle. */
813  if (!IsVehicleTypeDisabled(e->type, true)) AI::NewEvent(e->preview_company, new ScriptEventEnginePreview(i));
814  if (IsInteractiveCompany(e->preview_company)) ShowEnginePreviewWindow(i);
815  }
816  }
817  }
818 }
819 
825 {
826  Engine *e;
827  FOR_ALL_ENGINES(e) {
828  SB(e->company_hidden, cid, 1, 0);
829  }
830 }
831 
841 CommandCost CmdSetVehicleVisibility(TileIndex tile, DoCommandFlag flags, uint32 p1, uint32 p2, const char *text)
842 {
843  Engine *e = Engine::GetIfValid(GB(p2, 0, 31));
844  if (e == NULL || _current_company >= MAX_COMPANIES) return CMD_ERROR;
845  if (!IsEngineBuildable(e->index, e->type, _current_company)) return CMD_ERROR;
846 
847  if ((flags & DC_EXEC) != 0) {
848  SB(e->company_hidden, _current_company, 1, GB(p2, 31, 1));
850  }
851 
852  return CommandCost();
853 }
854 
865 CommandCost CmdWantEnginePreview(TileIndex tile, DoCommandFlag flags, uint32 p1, uint32 p2, const char *text)
866 {
867  Engine *e = Engine::GetIfValid(p1);
868  if (e == NULL || !(e->flags & ENGINE_EXCLUSIVE_PREVIEW) || e->preview_company != _current_company) return CMD_ERROR;
869 
870  if (flags & DC_EXEC) AcceptEnginePreview(p1, _current_company);
871 
872  return CommandCost();
873 }
874 
881 {
882  Vehicle *v;
883  Company *c;
884  EngineID index = e->index;
885 
886  /* In case the company didn't build the vehicle during the intro period,
887  * prevent that company from getting future intro periods for a while. */
888  if (e->flags & ENGINE_EXCLUSIVE_PREVIEW) {
889  FOR_ALL_COMPANIES(c) {
890  uint block_preview = c->block_preview;
891 
892  if (!HasBit(e->company_avail, c->index)) continue;
893 
894  /* We assume the user did NOT build it.. prove me wrong ;) */
895  c->block_preview = 20;
896 
897  FOR_ALL_VEHICLES(v) {
898  if (v->type == VEH_TRAIN || v->type == VEH_ROAD || v->type == VEH_SHIP ||
900  if (v->owner == c->index && v->engine_type == index) {
901  /* The user did prove me wrong, so restore old value */
902  c->block_preview = block_preview;
903  break;
904  }
905  }
906  }
907  }
908  }
909 
912 
913  /* Now available for all companies */
914  e->company_avail = (CompanyMask)-1;
915 
916  /* Do not introduce new rail wagons */
917  if (IsWagon(index)) return;
918 
919  if (e->type == VEH_TRAIN) {
920  /* maybe make another rail type available */
921  RailType railtype = e->u.rail.railtype;
922  assert(railtype < RAILTYPE_END);
923  FOR_ALL_COMPANIES(c) c->avail_railtypes = AddDateIntroducedRailTypes(c->avail_railtypes | GetRailTypeInfo(e->u.rail.railtype)->introduces_railtypes, _date);
924  } else if (e->type == VEH_ROAD) {
925  /* maybe make another road type available */
926  FOR_ALL_COMPANIES(c) SetBit(c->avail_roadtypes, HasBit(e->info.misc_flags, EF_ROAD_TRAM) ? ROADTYPE_TRAM : ROADTYPE_ROAD);
927  }
928 
929  /* Only broadcast event if AIs are able to build this vehicle type. */
930  if (!IsVehicleTypeDisabled(e->type, true)) AI::BroadcastNewEvent(new ScriptEventEngineAvailable(index));
931 
932  /* Only provide the "New Vehicle available" news paper entry, if engine can be built. */
933  if (!IsVehicleTypeDisabled(e->type, false)) {
934  SetDParam(0, GetEngineCategoryName(index));
935  SetDParam(1, index);
936  AddNewsItem(STR_NEWS_NEW_VEHICLE_NOW_AVAILABLE_WITH_TYPE, NT_NEW_VEHICLES, NF_VEHICLE, NR_ENGINE, index);
937  }
938 
939  /* Update the toolbar. */
942 
943  /* Close pending preview windows */
945 }
946 
949 {
951  Engine *e;
952  FOR_ALL_ENGINES(e) {
953  /* Age the vehicle */
954  if ((e->flags & ENGINE_AVAILABLE) && e->age != MAX_DAY) {
955  e->age++;
957  }
958 
959  /* Do not introduce invalid engines */
960  if (!e->IsEnabled()) continue;
961 
962  if (!(e->flags & ENGINE_AVAILABLE) && _date >= (e->intro_date + DAYS_IN_YEAR)) {
963  /* Introduce it to all companies */
965  } else if (!(e->flags & (ENGINE_AVAILABLE | ENGINE_EXCLUSIVE_PREVIEW)) && _date >= e->intro_date) {
966  /* Introduction date has passed...
967  * Check if it is allowed to build this vehicle type at all
968  * based on the current game settings. If not, it does not
969  * make sense to show the preview dialog to any company. */
970  if (IsVehicleTypeDisabled(e->type, false)) continue;
971 
972  /* Do not introduce new rail wagons */
973  if (IsWagon(e->index)) continue;
974 
975  /* Show preview dialog to one of the companies. */
978  e->preview_asked = 0;
979  }
980  }
981 
982  InvalidateWindowClassesData(WC_BUILD_VEHICLE); // rebuild the purchase list (esp. when sorted by reliability)
983  }
984 }
985 
991 static bool IsUniqueEngineName(const char *name)
992 {
993  const Engine *e;
994 
995  FOR_ALL_ENGINES(e) {
996  if (e->name != NULL && strcmp(e->name, name) == 0) return false;
997  }
998 
999  return true;
1000 }
1001 
1011 CommandCost CmdRenameEngine(TileIndex tile, DoCommandFlag flags, uint32 p1, uint32 p2, const char *text)
1012 {
1013  Engine *e = Engine::GetIfValid(p1);
1014  if (e == NULL) return CMD_ERROR;
1015 
1016  bool reset = StrEmpty(text);
1017 
1018  if (!reset) {
1020  if (!IsUniqueEngineName(text)) return_cmd_error(STR_ERROR_NAME_MUST_BE_UNIQUE);
1021  }
1022 
1023  if (flags & DC_EXEC) {
1024  free(e->name);
1025 
1026  if (reset) {
1027  e->name = NULL;
1028  } else {
1029  e->name = stredup(text);
1030  }
1031 
1033  }
1034 
1035  return CommandCost();
1036 }
1037 
1038 
1048 {
1049  const Engine *e = Engine::GetIfValid(engine);
1050 
1051  /* check if it's an engine that is in the engine array */
1052  if (e == NULL) return false;
1053 
1054  /* check if it's an engine of specified type */
1055  if (e->type != type) return false;
1056 
1057  /* check if it's available ... */
1058  if (company == OWNER_DEITY) {
1059  /* ... for any company (preview does not count) */
1060  if (!(e->flags & ENGINE_AVAILABLE) || e->company_avail == 0) return false;
1061  } else {
1062  /* ... for this company */
1063  if (!HasBit(e->company_avail, company)) return false;
1064  }
1065 
1066  if (!e->IsEnabled()) return false;
1067 
1068  if (type == VEH_TRAIN && company != OWNER_DEITY) {
1069  /* Check if the rail type is available to this company */
1070  const Company *c = Company::Get(company);
1071  if (((GetRailTypeInfo(e->u.rail.railtype))->compatible_railtypes & c->avail_railtypes) == 0) return false;
1072  }
1073 
1074  return true;
1075 }
1076 
1084 {
1085  const Engine *e = Engine::GetIfValid(engine);
1086 
1087  /* check if it's an engine that is in the engine array */
1088  if (e == NULL) return false;
1089 
1090  if (!e->CanCarryCargo()) return false;
1091 
1092  const EngineInfo *ei = &e->info;
1093  if (ei->refit_mask == 0) return false;
1094 
1095  /* Are there suffixes?
1096  * Note: This does not mean the suffixes are actually available for every consist at any time. */
1097  if (HasBit(ei->callback_mask, CBM_VEHICLE_CARGO_SUFFIX)) return true;
1098 
1099  /* Is there any cargo except the default cargo? */
1100  CargoID default_cargo = e->GetDefaultCargoType();
1101  return default_cargo != CT_INVALID && ei->refit_mask != 1U << default_cargo;
1102 }
1103 
1108 {
1109  const Engine *e;
1110  Date min_date = INT32_MAX;
1111 
1112  FOR_ALL_ENGINES(e) {
1113  if (!e->IsEnabled()) continue;
1114 
1115  /* We have an available engine... yay! */
1116  if ((e->flags & ENGINE_AVAILABLE) != 0 && e->company_avail != 0) return;
1117 
1118  /* Okay, try to find the earliest date. */
1119  min_date = min(min_date, e->info.base_intro);
1120  }
1121 
1122  if (min_date < INT32_MAX) {
1123  SetDParam(0, min_date);
1124  ShowErrorMessage(STR_ERROR_NO_VEHICLES_AVAILABLE_YET, STR_ERROR_NO_VEHICLES_AVAILABLE_YET_EXPLANATION, WL_WARNING);
1125  } else {
1126  ShowErrorMessage(STR_ERROR_NO_VEHICLES_AVAILABLE_AT_ALL, STR_ERROR_NO_VEHICLES_AVAILABLE_AT_ALL_EXPLANATION, WL_WARNING);
1127  }
1128 }