src/timetable_cmd.cpp

   1 /* $Id$ */
   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
  10 /** @file timetable_cmd.cpp Commands related to time tabling. */
  11
  12 #include "stdafx.h"
  13 #include "command_func.h"
  14 #include "company_func.h"
  15 #include "date_func.h"
  16 #include "window_func.h"
  17 #include "vehicle_base.h"
  18 #include "cmd_helper.h"
  19 #include "settings_type.h"
  20 #include "core/sort_func.hpp"
  21 #include "scope.h"
  22
  23 #include "table/strings.h"
  24
  25 #include "safeguards.h"
  26
  27 /**
  28  * Change/update a particular timetable entry.
  29  * @param v            The vehicle to change the timetable of.
  30  * @param order_number The index of the timetable in the order list.
  31  * @param val          The new data of the timetable entry.
  32  * @param mtf          Which part of the timetable entry to change.
  33  * @param timetabled   If the new value is explicitly timetabled.
  34  */
  35 static void ChangeTimetable(Vehicle *v, VehicleOrderID order_number, uint16 val, ModifyTimetableFlags mtf, bool timetabled)
  36 {
  37         Order *order = v->GetOrder(order_number);
  38         int total_delta = 0;
  39         int timetable_delta = 0;
  40
  41         switch (mtf) {
  42                 case MTF_WAIT_TIME:
  43                         if (!order->IsType(OT_CONDITIONAL)) {
  44                                 total_delta = val - order->GetWaitTime();
  45                                 timetable_delta = (timetabled ? val : 0) - order->GetTimetabledWait();
  46                         }
  47                         order->SetWaitTime(val);
  48                         order->SetWaitTimetabled(timetabled);
  49                         break;
  50
  51                 case MTF_TRAVEL_TIME:
  52                         if (!order->IsType(OT_CONDITIONAL)) {
  53                                 total_delta = val - order->GetTravelTime();
  54                                 timetable_delta = (timetabled ? val : 0) - order->GetTimetabledTravel();
  55                         }
  56                         if (order->IsType(OT_CONDITIONAL)) assert_msg(val == order->GetTravelTime(), "%u == %u", val, order->GetTravelTime());
  57                         order->SetTravelTime(val);
  58                         order->SetTravelTimetabled(timetabled);
  59                         break;
  60
  61                 case MTF_TRAVEL_SPEED:
  62                         order->SetMaxSpeed(val);
  63                         break;
  64
  65                 default:
  66                         NOT_REACHED();
  67         }
  68         v->UpdateTotalDuration(total_delta);
  69         v->UpdateTimetableDuration(timetable_delta);
  70
  71         for (v = v->FirstShared(); v != NULL; v = v->NextShared()) {
  72                 if (v->cur_real_order_index == order_number && v->current_order.Equals(*order)) {
  73                         switch (mtf) {
  74                                 case MTF_WAIT_TIME:
  75                                         v->current_order.SetWaitTime(val);
  76                                         v->current_order.SetWaitTimetabled(timetabled);
  77                                         break;
  78
  79                                 case MTF_TRAVEL_TIME:
  80                                         v->current_order.SetTravelTime(val);
  81                                         v->current_order.SetTravelTimetabled(timetabled);
  82                                         break;
  83
  84                                 case MTF_TRAVEL_SPEED:
  85                                         v->current_order.SetMaxSpeed(val);
  86                                         break;
  87
  88                                 default:
  89                                         NOT_REACHED();
  90                         }
  91                 }
  92                 SetWindowDirty(WC_VEHICLE_TIMETABLE, v->index);
  93         }
  94 }
  95
  96 /**
  97  * Change timetable data of an order.
  98  * @param tile Not used.
  99  * @param flags Operation to perform.
 100  * @param p1 Various bitstuffed elements
 101  * - p1 = (bit  0-19) - Vehicle with the orders to change.
 102  * - p1 = (bit 20-27) - Order index to modify.
 103  * - p1 = (bit 28-29) - Timetable data to change (@see ModifyTimetableFlags)
 104  * @param p2 The amount of time to wait.
 105  * - p2 = (bit  0-15) - The data to modify as specified by p1 bits 28-29.
 106  *                      0 to clear times, UINT16_MAX to clear speed limit.
 107  * @param text unused
 108  * @return the cost of this operation or an error
 109  */
 110 CommandCost CmdChangeTimetable(TileIndex tile, DoCommandFlag flags, uint32 p1, uint32 p2, const char *text)
 111 {
 112         VehicleID veh = GB(p1, 0, 20);
 113
 114         Vehicle *v = Vehicle::GetIfValid(veh);
 115         if (v == NULL || !v->IsPrimaryVehicle()) return CMD_ERROR;
 116
 117         CommandCost ret = CheckOwnership(v->owner);
 118         if (ret.Failed()) return ret;
 119
 120         VehicleOrderID order_number = GB(p1, 20, 8);
 121         Order *order = v->GetOrder(order_number);
 122         if (order == NULL || order->IsType(OT_IMPLICIT)) return CMD_ERROR;
 123
 124         ModifyTimetableFlags mtf = Extract<ModifyTimetableFlags, 28, 2>(p1);
 125         if (mtf >= MTF_END) return CMD_ERROR;
 126
 127         int wait_time   = order->GetWaitTime();
 128         int travel_time = order->GetTravelTime();
 129         int max_speed   = order->GetMaxSpeed();
 130         switch (mtf) {
 131                 case MTF_WAIT_TIME:
 132                         wait_time = GB(p2, 0, 16);
 133                         break;
 134
 135                 case MTF_TRAVEL_TIME:
 136                         travel_time = GB(p2, 0, 16);
 137                         break;
 138
 139                 case MTF_TRAVEL_SPEED:
 140                         max_speed = GB(p2, 0, 16);
 141                         if (max_speed == 0) max_speed = UINT16_MAX; // Disable speed limit.
 142                         break;
 143
 144                 default:
 145                         NOT_REACHED();
 146         }
 147
 148         if (wait_time != order->GetWaitTime()) {
 149                 switch (order->GetType()) {
 150                         case OT_GOTO_STATION:
 151                                 if (order->GetNonStopType() & ONSF_NO_STOP_AT_DESTINATION_STATION) return_cmd_error(STR_ERROR_TIMETABLE_NOT_STOPPING_HERE);
 152                                 break;
 153
 154                         case OT_GOTO_DEPOT:
 155                                 break;
 156
 157                         case OT_CONDITIONAL:
 158                                 break;
 159
 160                         default: return_cmd_error(STR_ERROR_TIMETABLE_ONLY_WAIT_AT_STATIONS);
 161                 }
 162         }
 163
 164         if (travel_time != order->GetTravelTime() && order->IsType(OT_CONDITIONAL)) return CMD_ERROR;
 165         if (max_speed != order->GetMaxSpeed() && (order->IsType(OT_CONDITIONAL) || v->type == VEH_AIRCRAFT)) return CMD_ERROR;
 166
 167         if (flags & DC_EXEC) {
 168                 switch (mtf) {
 169                         case MTF_WAIT_TIME:
 170                                 /* Set time if changing the value or confirming an estimated time as timetabled. */
 171                                 if (wait_time != order->GetWaitTime() || (wait_time > 0 && !order->IsWaitTimetabled())) {
 172                                         ChangeTimetable(v, order_number, wait_time, MTF_WAIT_TIME, wait_time > 0);
 173                                 }
 174                                 break;
 175
 176                         case MTF_TRAVEL_TIME:
 177                                 /* Set time if changing the value or confirming an estimated time as timetabled. */
 178                                 if (travel_time != order->GetTravelTime() || (travel_time > 0 && !order->IsTravelTimetabled())) {
 179                                         ChangeTimetable(v, order_number, travel_time, MTF_TRAVEL_TIME, travel_time > 0);
 180                                 }
 181                                 break;
 182
 183                         case MTF_TRAVEL_SPEED:
 184                                 if (max_speed != order->GetMaxSpeed()) {
 185                                         ChangeTimetable(v, order_number, max_speed, MTF_TRAVEL_SPEED, max_speed != UINT16_MAX);
 186                                 }
 187                                 break;
 188
 189                         default:
 190                                 break;
 191                 }
 192         }
 193
 194         return CommandCost();
 195 }
 196
 197 /**
 198  * Change timetable data of all orders of a vehicle.
 199  * @param tile Not used.
 200  * @param flags Operation to perform.
 201  * @param p1 Various bitstuffed elements
 202  * - p1 = (bit  0-19) - Vehicle with the orders to change.
 203  * - p1 = (bit 20-27) - unused
 204  * - p1 = (bit 28-29) - Timetable data to change (@see ModifyTimetableFlags)
 205  * - p1 = (bit    30) - 0 to set timetable wait/travel time, 1 to clear it
 206  * @param p2 The amount of time to wait.
 207  * - p2 = (bit  0-15) - The data to modify as specified by p1 bits 28-29.
 208  *                      0 to clear times, UINT16_MAX to clear speed limit.
 209  * @param text unused
 210  * @return the cost of this operation or an error
 211  */
 212 CommandCost CmdBulkChangeTimetable(TileIndex tile, DoCommandFlag flags, uint32 p1, uint32 p2, const char *text)
 213 {
 214         VehicleID veh = GB(p1, 0, 20);
 215
 216         Vehicle *v = Vehicle::GetIfValid(veh);
 217         if (v == NULL || !v->IsPrimaryVehicle()) return CMD_ERROR;
 218
 219         CommandCost ret = CheckOwnership(v->owner);
 220         if (ret.Failed()) return ret;
 221
 222         ModifyTimetableFlags mtf = Extract<ModifyTimetableFlags, 28, 2>(p1);
 223         if (mtf >= MTF_END) return CMD_ERROR;
 224
 225         if (v->GetNumOrders() == 0) return CMD_ERROR;
 226
 227         if (flags & DC_EXEC) {
 228                 for (VehicleOrderID order_number = 0; order_number < v->GetNumOrders(); order_number++) {
 229                         Order *order = v->GetOrder(order_number);
 230                         if (order == NULL || order->IsType(OT_IMPLICIT)) continue;
 231
 232                         uint32 new_p1 = p1;
 233                         SB(new_p1, 20, 8, order_number);
 234                         DoCommand(tile, new_p1, p2, flags, CMD_CHANGE_TIMETABLE);
 235                 }
 236         }
 237
 238         return CommandCost();
 239 }
 240
 241 /**
 242  * Clear the lateness counter to make the vehicle on time.
 243  * @param tile Not used.
 244  * @param flags Operation to perform.
 245  * @param p1 Various bitstuffed elements
 246  * - p1 = (bit  0-19) - Vehicle with the orders to change.
 247  * @param p2 unused
 248  * @param text unused
 249  * @return the cost of this operation or an error
 250  */
 251 CommandCost CmdSetVehicleOnTime(TileIndex tile, DoCommandFlag flags, uint32 p1, uint32 p2, const char *text)
 252 {
 253         VehicleID veh = GB(p1, 0, 20);
 254
 255         Vehicle *v = Vehicle::GetIfValid(veh);
 256         if (v == NULL || !v->IsPrimaryVehicle() || !v->HasOrdersList()) return CMD_ERROR;
 257
 258         CommandCost ret = CheckOwnership(v->owner);
 259         if (ret.Failed()) return ret;
 260
 261         if (flags & DC_EXEC) {
 262                 v->lateness_counter = 0;
 263                 SetWindowDirty(WC_VEHICLE_TIMETABLE, v->index);
 264         }
 265
 266         return CommandCost();
 267 }
 268
 269 /**
 270  * Order vehicles based on their timetable. The vehicles will be sorted in order
 271  * they would reach the first station.
 272  *
 273  * @param ap First Vehicle pointer.
 274  * @param bp Second Vehicle pointer.
 275  * @return Comparison value.
 276  */
 277 static int CDECL VehicleTimetableSorter(Vehicle * const *ap, Vehicle * const *bp)
 278 {
 279         const Vehicle *a = *ap;
 280         const Vehicle *b = *bp;
 281
 282         VehicleOrderID a_order = a->cur_real_order_index;
 283         VehicleOrderID b_order = b->cur_real_order_index;
 284         int j = (int)b_order - (int)a_order;
 285
 286         /* Are we currently at an ordered station (un)loading? */
 287         bool a_load = a->current_order.IsType(OT_LOADING) && a->current_order.GetNonStopType() != ONSF_STOP_EVERYWHERE;
 288         bool b_load = b->current_order.IsType(OT_LOADING) && b->current_order.GetNonStopType() != ONSF_STOP_EVERYWHERE;
 289
 290         /* If the current order is not loading at the ordered station, decrease the order index by one since we have
 291          * not yet arrived at the station (and thus the timetable entry; still in the travelling of the previous one).
 292          * Since the ?_order variables are unsigned the -1 will flow under and place the vehicles going to order #0 at
 293          * the begin of the list with vehicles arriving at #0. */
 294         if (!a_load) a_order--;
 295         if (!b_load) b_order--;
 296
 297         /* First check the order index that accounted for loading, then just the raw one. */
 298         int i = (int)b_order - (int)a_order;
 299         if (i != 0) return i;
 300         if (j != 0) return j;
 301
 302         /* Look at the time we spent in this order; the higher, the closer to its destination. */
 303         i = b->current_order_time - a->current_order_time;
 304         if (i != 0) return i;
 305
 306         /* If all else is equal, use some unique index to sort it the same way. */
 307         return b->unitnumber - a->unitnumber;
 308 }
 309
 310 /**
 311  * Set the start date of the timetable.
 312  * @param tile Not used.
 313  * @param flags Operation to perform.
 314  * @param p2 Various bitstuffed elements
 315  * - p2 = (bit 0-19) - Vehicle ID.
 316  * - p2 = (bit 20)   - Set to 1 to set timetable start for all vehicles sharing this order
 317  * @param p2 The timetable start date.
 318  * @param text Not used.
 319  * @return The error or cost of the operation.
 320  */
 321 CommandCost CmdSetTimetableStart(TileIndex tile, DoCommandFlag flags, uint32 p1, uint32 p2, const char *text)
 322 {
 323         bool timetable_all = HasBit(p1, 20);
 324         Vehicle *v = Vehicle::GetIfValid(GB(p1, 0, 20));
 325         if (v == NULL || !v->IsPrimaryVehicle() || !v->HasOrdersList()) return CMD_ERROR;
 326
 327         CommandCost ret = CheckOwnership(v->owner);
 328         if (ret.Failed()) return ret;
 329
 330         /* Don't let a timetable start more than 15 years into the future or 1 year in the past. */
 331         Date start_date = (Date)p2;
 332         if (start_date < 0 || start_date > MAX_DAY) return CMD_ERROR;
 333         if (start_date - _date > 15 * DAYS_IN_LEAP_YEAR) return CMD_ERROR;
 334         if (_date - start_date > DAYS_IN_LEAP_YEAR) return CMD_ERROR;
 335         if (timetable_all && !v->HasCompleteTimetable()) return CMD_ERROR;
 336
 337         if (flags & DC_EXEC) {
 338                 SmallVector<Vehicle *, 8> vehs;
 339
 340                 if (timetable_all) {
 341                         for (Vehicle *w = v->FirstShared(); w != NULL; w = w->NextShared()) {
 342                                 *vehs.Append() = w;
 343                         }
 344                 } else {
 345                         *vehs.Append() = v;
 346                 }
 347
 348                 int total_duration = v->GetTimetableTotalDuration();
 349                 int num_vehs = vehs.Length();
 350
 351                 if (num_vehs >= 2) {
 352                         QSortT(vehs.Begin(), vehs.Length(), &VehicleTimetableSorter);
 353                 }
 354
 355                 int base = vehs.FindIndex(v);
 356
 357                 for (Vehicle **viter = vehs.Begin(); viter != vehs.End(); viter++) {
 358                         int idx = (viter - vehs.Begin()) - base;
 359                         Vehicle *w = *viter;
 360
 361                         w->lateness_counter = 0;
 362                         ClrBit(w->vehicle_flags, VF_TIMETABLE_STARTED);
 363                         /* Do multiplication, then division to reduce rounding errors. */
 364                         w->timetable_start = start_date + idx * total_duration / num_vehs / DAY_TICKS;
 365                         SetWindowDirty(WC_VEHICLE_TIMETABLE, w->index);
 366                 }
 367
 368         }
 369
 370         return CommandCost();
 371 }
 372
 373 /**
 374 * Start or stop automatic management of timetables.
 375 * @param tile Not used.
 376 * @param flags Operation to perform.
 377 * @param p1 Vehicle index.
 378 * @param p2 Various bitstuffed elements
 379 * - p2 = (bit 0) - Set to 1 to enable, 0 to disable automation.
 380 * - p2 = (bit 1) - Ctrl was pressed. Used to keep wait times.
 381 * @param text unused
 382 * @return the cost of this operation or an error
 383 */
 384 CommandCost CmdAutomateTimetable(TileIndex index, DoCommandFlag flags, uint32 p1, uint32 p2, const char *text)
 385 {
 386         VehicleID veh = GB(p1, 0, 16);
 387
 388         Vehicle *v = Vehicle::GetIfValid(veh);
 389         if (v == NULL || !v->IsPrimaryVehicle()) return CMD_ERROR;
 390
 391         CommandCost ret = CheckOwnership(v->owner);
 392         if (ret.Failed()) return ret;
 393
 394         if (flags & DC_EXEC) {
 395                 for (Vehicle *v2 = v->FirstShared(); v2 != NULL; v2 = v2->NextShared()) {
 396                         if (HasBit(p2, 0)) {
 397                                 /* Automated timetable. */
 398                                 SetBit(v2->vehicle_flags, VF_AUTOMATE_TIMETABLE);
 399
 400                                 if (HasBit(p2, 1)) {
 401                                         SetBit(v2->vehicle_flags, VF_AUTOMATE_PRES_WAIT_TIME);
 402                                 }
 403
 404                                 ClrBit(v2->vehicle_flags, VF_TIMETABLE_STARTED);
 405                                 v2->timetable_start = 0;
 406                                 v2->lateness_counter = 0;
 407                                 v2->current_loading_time = 0;
 408                         }
 409                         else {
 410                                 /* De-automate timetable. */
 411                                 ClrBit(v2->vehicle_flags, VF_AUTOMATE_TIMETABLE);
 412                                 ClrBit(v2->vehicle_flags, VF_AUTOMATE_PRES_WAIT_TIME);
 413                         }
 414                         SetWindowDirty(WC_VEHICLE_TIMETABLE, v2->index);
 415                 }
 416         }
 417
 418         return CommandCost();
 419 }
 420
 421 /**
 422  * Confirm all estimated wait and travel times as timetabled.
 423  * @param tile Not used.
 424  * @param flags Operation to perform.
 425  * @param p1 Vehicle index.
 426  * @param p2 Unused
 427  * @param text unused
 428  * @return the cost of this operation or an error
 429  */
 430 CommandCost CmdConfirmAll(TileIndex tile, DoCommandFlag flags, uint32 p1, uint32 p2, const char *text)
 431 {
 432         VehicleID veh = GB(p1, 0, 20);
 433
 434         Vehicle *v = Vehicle::GetIfValid(veh);
 435         if (v == nullptr || !v->IsPrimaryVehicle() || !v->HasOrdersList()) return CMD_ERROR;
 436
 437         CommandCost ret = CheckOwnership(v->owner);
 438         if (ret.Failed()) return ret;
 439
 440         if (flags & DC_EXEC) {
 441                 int num_orders = v->GetNumOrders();
 442                 int timetable_delta = 0;
 443
 444                 for (int i = 0; i < num_orders; ++i) {
 445                         Order* order = v->GetOrderAt(i);
 446
 447                         assert(order != nullptr);
 448
 449                         if (!order->IsType(OT_IMPLICIT)) {
 450                                 if (order->GetWaitTime() != 0 && !order->IsWaitTimetabled()) {
 451                                         timetable_delta += order->GetWaitTime() - order->GetTimetabledWait();
 452                                         order->SetWaitTimetabled(true);
 453                                 }
 454
 455                                 if (order->GetTravelTime() != 0 && !order->IsTravelTimetabled()) {
 456                                         timetable_delta += order->GetTravelTime() - order->GetTimetabledTravel();
 457                                         order->SetTravelTimetabled(true);
 458                                 }
 459                         }
 460                 }
 461
 462                 v->UpdateTimetableDuration(timetable_delta);
 463
 464                 SetWindowDirty(WC_VEHICLE_TIMETABLE, v->index);
 465         }
 466
 467         return CommandCost();
 468 }
 469
 470 /**
 471 * Set new separation parameters
 472 * @param tile  Not used.
 473 * @param flags Operation to perform.
 474 * @param p1    Vehicle id.
 475 * @param p2
 476 *   - p2 = (bit 0-2)  - Separation mode (@see TTSepMode)
 477 *   - p2 = (bit 3-31) - Separation parameter (Unused if #TTS_MODE_OFF | #TTS_MODE_AUTO,
 478 *                       Number of vehicles if #TTS_MODE_MAN_N, separation delay in ticks if #TTS_MODE_MAN_T).
 479 * @param text  Not used.
 480 * @return      The error or cost of the operation.
 481 */
 482 CommandCost CmdReinitSeparation(TileIndex tile, DoCommandFlag flags, uint32 p1, uint32 p2, const char *text)
 483 {
 484         Vehicle *v = Vehicle::GetIfValid(p1);
 485         if (v == NULL || !v->IsPrimaryVehicle()) return CMD_ERROR;
 486
 487         CommandCost ret = CheckOwnership(v->owner);
 488         if (ret.Failed()) return ret;
 489
 490         if (flags & DC_EXEC) {
 491                 v->SetSepSettings((TTSepMode)GB(p2, 0, 3), GB(p2, 3, 29));
 492         }
 493
 494         return CommandCost();
 495 }
 496
 497 /**
 498  * Update the timetable for the vehicle.
 499  * @param v The vehicle to update the timetable for.
 500  * @param traveling Whether we just traveled or waited at a station.
 501  */
 502 void UpdateVehicleTimetable(Vehicle *v, bool travelling)
 503 {
 504         if (!travelling) v->current_loading_time++; // +1 because this time is one tick behind
 505         uint time_taken = v->current_order_time;
 506         uint time_loading = v->current_loading_time;
 507
 508         // We are on our way so vehicle separation has finished.
 509         if (travelling) ClrBit(v->vehicle_flags, VF_SEPARATION_IN_PROGRESS);
 510
 511         v->current_order_time = 0;
 512         v->current_loading_time = 0;
 513
 514         if (v->current_order.IsType(OT_IMPLICIT)) return; // no timetabling of auto orders
 515
 516         if (v->cur_real_order_index >= v->GetNumOrders()) return;
 517         Order *real_current_order = v->GetOrder(v->cur_real_order_index);
 518         Order *real_timetable_order = v->cur_timetable_order_index != INVALID_VEH_ORDER_ID ? v->GetOrder(v->cur_timetable_order_index) : nullptr;
 519
 520         auto guard = scope_guard([v, travelling]() {
 521                 /* On next call, when updating waiting time, use current order even if travel field of current order isn't being updated */
 522                 if (travelling) v->cur_timetable_order_index = v->cur_real_order_index;
 523         });
 524
 525         VehicleOrderID first_manual_order = 0;
 526         for (Order *o = v->GetFirstOrder(); o != NULL && o->IsType(OT_IMPLICIT); o = o->next) {
 527                 ++first_manual_order;
 528         }
 529
 530         bool just_started = false;
 531
 532         /* Start automated timetables at first opportunity */
 533         if (!HasBit(v->vehicle_flags, VF_TIMETABLE_STARTED) && HasBit(v->vehicle_flags, VF_AUTOMATE_TIMETABLE)) {
 534                 SetBit(v->vehicle_flags, VF_TIMETABLE_STARTED);
 535
 536                 v->lateness_counter = 0;
 537
 538                 for (v = v->FirstShared(); v != NULL; v = v->NextShared()) {
 539                         SetWindowDirty(WC_VEHICLE_TIMETABLE, v->index);
 540                 }
 541                 return;
 542         }
 543
 544         /* This vehicle is arriving at the first destination in the timetable. */
 545         if (v->cur_real_order_index == first_manual_order && travelling) {
 546                 v->trip_history.NewRound();
 547                 /* If the start date hasn't been set, or it was set automatically when
 548                  * the vehicle last arrived at the first destination, update it to the
 549                  * current time. Otherwise set the late counter appropriately to when
 550                  * the vehicle should have arrived. */
 551                 just_started = !HasBit(v->vehicle_flags, VF_TIMETABLE_STARTED);
 552
 553                 if (v->timetable_start != 0) {
 554                         v->lateness_counter = (_date - v->timetable_start) * DAY_TICKS + _date_fract;
 555                         v->timetable_start = 0;
 556                 }
 557
 558                 SetBit(v->vehicle_flags, VF_TIMETABLE_STARTED);
 559                 SetWindowDirty(WC_VEHICLE_TIMETABLE, v->index);
 560         }
 561
 562         if (!HasBit(v->vehicle_flags, VF_TIMETABLE_STARTED)) return;
 563         if (real_timetable_order == nullptr) return;
 564
 565         bool is_conditional = real_timetable_order->IsType(OT_CONDITIONAL);
 566         bool remeasure_wait_time = !is_conditional && (!real_current_order->IsWaitTimetabled() ||
 567                 (HasBit(v->vehicle_flags, VF_AUTOMATE_TIMETABLE) && !HasBit(v->vehicle_flags, VF_AUTOMATE_PRES_WAIT_TIME)));
 568
 569         if (travelling && remeasure_wait_time) {
 570                 /* We just finished traveling and want to remeasure the loading time,
 571                  * so do not apply any restrictions for the loading to finish. */
 572                 v->current_order.SetWaitTime(0);
 573         }
 574
 575         bool travel_field = travelling;
 576         if (is_conditional) {
 577                 if (travelling) {
 578                         /* conditional orders use the wait field for the jump-taken travel time */
 579                         travel_field = false;
 580                 } else {
 581                         /* doesn't make sense to update wait time for conditional orders */
 582                         return;
 583                 }
 584         } else {
 585                 assert(real_timetable_order == real_current_order);
 586         }
 587
 588         if (just_started) return;
 589
 590         /* Before modifying waiting times, check whether we want to preserve bigger ones. */
 591         if (travelling || (time_taken > real_timetable_order->GetWaitTime()) || remeasure_wait_time) {
 592                 /* For trains/aircraft multiple movement cycles are done in one
 593                  * tick. This makes it possible to leave the station and process
 594                  * e.g. a depot order in the same tick, causing it to not fill
 595                  * the timetable entry like is done for road vehicles/ships.
 596                  * Thus always make sure at least one tick is used between the
 597                  * processing of different orders when filling the timetable. */
 598                 if (travel_field && !real_timetable_order->IsTravelTimetabled()) {
 599                         ChangeTimetable(v, v->cur_timetable_order_index, max(time_taken, 1U), MTF_TRAVEL_TIME, false);
 600                 } else if (!travel_field && !real_timetable_order->IsWaitTimetabled()) {
 601                         ChangeTimetable(v, v->cur_timetable_order_index, max(time_loading, 1U), MTF_WAIT_TIME, false);
 602                 }
 603         }
 604
 605         uint timetabled = travel_field ? real_timetable_order->GetTimetabledTravel() :
 606                         real_timetable_order->GetTimetabledWait();
 607
 608         /* Update the timetable to gradually shift order times towards the actual travel times. */
 609         if (timetabled != 0 && HasBit(v->vehicle_flags, VF_AUTOMATE_TIMETABLE) && (travelling || !HasBit(v->vehicle_flags, VF_AUTOMATE_PRES_WAIT_TIME))) {
 610                 int32 new_time;
 611                 if (travelling) {
 612                         new_time = time_taken + _settings_game.order.timetable_auto_travel_buffer;
 613
 614                         assert(_settings_game.order.timetable_auto_travel_rounding != 0);
 615
 616                         if (new_time % _settings_game.order.timetable_auto_travel_rounding != 0) {
 617                                 new_time /= _settings_game.order.timetable_auto_travel_rounding;
 618                                 new_time += 1;
 619                                 new_time *= _settings_game.order.timetable_auto_travel_rounding;
 620                         }
 621                 }
 622                 else {
 623                         new_time = time_loading + _settings_game.order.timetable_auto_load_buffer;
 624
 625                         assert(_settings_game.order.timetable_auto_load_rounding != 0);
 626
 627                         if (new_time % _settings_game.order.timetable_auto_load_rounding != 0) {
 628                                 new_time /= _settings_game.order.timetable_auto_load_rounding;
 629                                 new_time += 1;
 630                                 new_time *= _settings_game.order.timetable_auto_load_rounding;
 631                         }
 632                 }
 633
 634                 if (new_time > (int32)timetabled * 4 && travelling) {
 635                         /* Possible jam, clear time and restart timetable for all vehicles.
 636                         * Otherwise we risk trains blocking 1-lane stations for long times. */
 637                         ChangeTimetable(v, v->cur_timetable_order_index, 0, travel_field ? MTF_TRAVEL_TIME : MTF_WAIT_TIME, true);
 638                         for (Vehicle *v2 = v->FirstShared(); v2 != NULL; v2 = v2->NextShared()) {
 639                                 ClrBit(v2->vehicle_flags, VF_TIMETABLE_STARTED);
 640                                 SetWindowDirty(WC_VEHICLE_TIMETABLE, v2->index);
 641                         }
 642                         return;
 643                 }
 644                 else if (!travelling || (new_time >= (int32)timetabled / 2)) {
 645                         /* Compute running average, with sign conversion to avoid negative overflow. */
 646                         if (new_time < (int32)timetabled) {
 647                                 new_time = ((int32)timetabled * 3 + new_time * 2 + 2) / 5;
 648                         }
 649                         else {
 650                                 new_time = ((int32)timetabled * 9 + new_time + 5) / 10;
 651                         }
 652                 }
 653                 else {
 654                         /* new time is less than half old time, set value directly */
 655                 }
 656
 657                 if (new_time < 1) new_time = 1;
 658                 if (new_time != (int32)timetabled) {
 659                         ChangeTimetable(v, v->cur_timetable_order_index, new_time, travel_field ? MTF_TRAVEL_TIME : MTF_WAIT_TIME, true);
 660                 }
 661         }
 662         else if (timetabled == 0 && HasBit(v->vehicle_flags, VF_AUTOMATE_TIMETABLE)) {
 663                 /* Add times for orders that are not yet timetabled, even while not autofilling */
 664                 const int32 new_time = travelling ? time_taken : time_loading;
 665
 666                 ChangeTimetable(v, v->cur_timetable_order_index, new_time, travel_field ? MTF_TRAVEL_TIME : MTF_WAIT_TIME, true);
 667         }
 668
 669         /* Vehicles will wait at stations if they arrive early even if they are not
 670          * timetabled to wait there, so make sure the lateness counter is updated
 671          * when this happens. */
 672         if (timetabled == 0 && (travelling || v->lateness_counter >= 0)) return;
 673
 674         v->lateness_counter -= (timetabled - time_taken);
 675
 676         /* When we are more late than this timetabled bit takes we (somewhat expensively)
 677          * check how many ticks the (fully filled) timetable has. If a timetable cycle is
 678          * shorter than the amount of ticks we are late we reduce the lateness by the
 679          * length of a full cycle till lateness is less than the length of a timetable
 680          * cycle. When the timetable isn't fully filled the cycle will be INVALID_TICKS. */
 681         if (v->lateness_counter > (int)timetabled) {
 682                 Ticks cycle = v->GetTimetableTotalDuration();
 683                 if (cycle != INVALID_TICKS && v->lateness_counter > cycle) {
 684                         v->lateness_counter %= cycle;
 685                 }
 686         }
 687
 688         for (v = v->FirstShared(); v != NULL; v = v->NextShared()) {
 689                 SetWindowDirty(WC_VEHICLE_TIMETABLE, v->index);
 690         }
 691 }