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 "core/sort_func.hpp"
  20
  21 #include "table/strings.h"
  22
  23 #include "safeguards.h"
  24
  25 /**
  26  * Change/update a particular timetable entry.
  27  * @param v            The vehicle to change the timetable of.
  28  * @param order_number The index of the timetable in the order list.
  29  * @param val          The new data of the timetable entry.
  30  * @param mtf          Which part of the timetable entry to change.
  31  * @param timetabled   If the new value is explicitly timetabled.
  32  */
  33 static void ChangeTimetable(Vehicle *v, VehicleOrderID order_number, uint16 val, ModifyTimetableFlags mtf, bool timetabled)
  34 {
  35         Order *order = v->GetOrder(order_number);
  36         int total_delta = 0;
  37         int timetable_delta = 0;
  38
  39         switch (mtf) {
  40                 case MTF_WAIT_TIME:
  41                         total_delta = val - order->GetWaitTime();
  42                         timetable_delta = (timetabled ? val : 0) - order->GetTimetabledWait();
  43                         order->SetWaitTime(val);
  44                         order->SetWaitTimetabled(timetabled);
  45                         break;
  46
  47                 case MTF_TRAVEL_TIME:
  48                         total_delta = val - order->GetTravelTime();
  49                         timetable_delta = (timetabled ? val : 0) - order->GetTimetabledTravel();
  50                         order->SetTravelTime(val);
  51                         order->SetTravelTimetabled(timetabled);
  52                         break;
  53
  54                 case MTF_TRAVEL_SPEED:
  55                         order->SetMaxSpeed(val);
  56                         break;
  57
  58                 default:
  59                         NOT_REACHED();
  60         }
  61         v->orders.list->UpdateTotalDuration(total_delta);
  62         v->orders.list->UpdateTimetableDuration(timetable_delta);
  63
  64         for (v = v->FirstShared(); v != nullptr; v = v->NextShared()) {
  65                 if (v->cur_real_order_index == order_number && v->current_order.Equals(*order)) {
  66                         switch (mtf) {
  67                                 case MTF_WAIT_TIME:
  68                                         v->current_order.SetWaitTime(val);
  69                                         v->current_order.SetWaitTimetabled(timetabled);
  70                                         break;
  71
  72                                 case MTF_TRAVEL_TIME:
  73                                         v->current_order.SetTravelTime(val);
  74                                         v->current_order.SetTravelTimetabled(timetabled);
  75                                         break;
  76
  77                                 case MTF_TRAVEL_SPEED:
  78                                         v->current_order.SetMaxSpeed(val);
  79                                         break;
  80
  81                                 default:
  82                                         NOT_REACHED();
  83                         }
  84                 }
  85                 SetWindowDirty(WC_VEHICLE_TIMETABLE, v->index);
  86         }
  87 }
  88
  89 /**
  90  * Change timetable data of an order.
  91  * @param tile Not used.
  92  * @param flags Operation to perform.
  93  * @param p1 Various bitstuffed elements
  94  * - p1 = (bit  0-19) - Vehicle with the orders to change.
  95  * - p1 = (bit 20-27) - Order index to modify.
  96  * - p1 = (bit 28-29) - Timetable data to change (@see ModifyTimetableFlags)
  97  * @param p2 The amount of time to wait.
  98  * - p2 = (bit  0-15) - The data to modify as specified by p1 bits 28-29.
  99  *                      0 to clear times, UINT16_MAX to clear speed limit.
 100  * @param text unused
 101  * @return the cost of this operation or an error
 102  */
 103 CommandCost CmdChangeTimetable(TileIndex tile, DoCommandFlag flags, uint32 p1, uint32 p2, const char *text)
 104 {
 105         VehicleID veh = GB(p1, 0, 20);
 106
 107         Vehicle *v = Vehicle::GetIfValid(veh);
 108         if (v == nullptr || !v->IsPrimaryVehicle()) return CMD_ERROR;
 109
 110         CommandCost ret = CheckOwnership(v->owner);
 111         if (ret.Failed()) return ret;
 112
 113         VehicleOrderID order_number = GB(p1, 20, 8);
 114         Order *order = v->GetOrder(order_number);
 115         if (order == nullptr || order->IsType(OT_IMPLICIT)) return CMD_ERROR;
 116
 117         ModifyTimetableFlags mtf = Extract<ModifyTimetableFlags, 28, 2>(p1);
 118         if (mtf >= MTF_END) return CMD_ERROR;
 119
 120         int wait_time   = order->GetWaitTime();
 121         int travel_time = order->GetTravelTime();
 122         int max_speed   = order->GetMaxSpeed();
 123         switch (mtf) {
 124                 case MTF_WAIT_TIME:
 125                         wait_time = GB(p2, 0, 16);
 126                         break;
 127
 128                 case MTF_TRAVEL_TIME:
 129                         travel_time = GB(p2, 0, 16);
 130                         break;
 131
 132                 case MTF_TRAVEL_SPEED:
 133                         max_speed = GB(p2, 0, 16);
 134                         if (max_speed == 0) max_speed = UINT16_MAX; // Disable speed limit.
 135                         break;
 136
 137                 default:
 138                         NOT_REACHED();
 139         }
 140
 141         if (wait_time != order->GetWaitTime()) {
 142                 switch (order->GetType()) {
 143                         case OT_GOTO_STATION:
 144                                 if (order->GetNonStopType() & ONSF_NO_STOP_AT_DESTINATION_STATION) return_cmd_error(STR_ERROR_TIMETABLE_NOT_STOPPING_HERE);
 145                                 break;
 146
 147                         case OT_CONDITIONAL:
 148                                 break;
 149
 150                         default: return_cmd_error(STR_ERROR_TIMETABLE_ONLY_WAIT_AT_STATIONS);
 151                 }
 152         }
 153
 154         if (travel_time != order->GetTravelTime() && order->IsType(OT_CONDITIONAL)) return CMD_ERROR;
 155         if (max_speed != order->GetMaxSpeed() && (order->IsType(OT_CONDITIONAL) || v->type == VEH_AIRCRAFT)) return CMD_ERROR;
 156
 157         if (flags & DC_EXEC) {
 158                 switch (mtf) {
 159                         case MTF_WAIT_TIME:
 160                                 /* Set time if changing the value or confirming an estimated time as timetabled. */
 161                                 if (wait_time != order->GetWaitTime() || (wait_time > 0 && !order->IsWaitTimetabled())) {
 162                                         ChangeTimetable(v, order_number, wait_time, MTF_WAIT_TIME, wait_time > 0);
 163                                 }
 164                                 break;
 165
 166                         case MTF_TRAVEL_TIME:
 167                                 /* Set time if changing the value or confirming an estimated time as timetabled. */
 168                                 if (travel_time != order->GetTravelTime() || (travel_time > 0 && !order->IsTravelTimetabled())) {
 169                                         ChangeTimetable(v, order_number, travel_time, MTF_TRAVEL_TIME, travel_time > 0);
 170                                 }
 171                                 break;
 172
 173                         case MTF_TRAVEL_SPEED:
 174                                 if (max_speed != order->GetMaxSpeed()) {
 175                                         ChangeTimetable(v, order_number, max_speed, MTF_TRAVEL_SPEED, max_speed != UINT16_MAX);
 176                                 }
 177                                 break;
 178
 179                         default:
 180                                 break;
 181                 }
 182         }
 183
 184         return CommandCost();
 185 }
 186
 187 /**
 188  * Clear the lateness counter to make the vehicle on time.
 189  * @param tile Not used.
 190  * @param flags Operation to perform.
 191  * @param p1 Various bitstuffed elements
 192  * - p1 = (bit  0-19) - Vehicle with the orders to change.
 193  * @param p2 unused
 194  * @param text unused
 195  * @return the cost of this operation or an error
 196  */
 197 CommandCost CmdSetVehicleOnTime(TileIndex tile, DoCommandFlag flags, uint32 p1, uint32 p2, const char *text)
 198 {
 199         VehicleID veh = GB(p1, 0, 20);
 200
 201         Vehicle *v = Vehicle::GetIfValid(veh);
 202         if (v == nullptr || !v->IsPrimaryVehicle() || v->orders.list == nullptr) return CMD_ERROR;
 203
 204         CommandCost ret = CheckOwnership(v->owner);
 205         if (ret.Failed()) return ret;
 206
 207         if (flags & DC_EXEC) {
 208                 v->lateness_counter = 0;
 209                 SetWindowDirty(WC_VEHICLE_TIMETABLE, v->index);
 210         }
 211
 212         return CommandCost();
 213 }
 214
 215 /**
 216  * Order vehicles based on their timetable. The vehicles will be sorted in order
 217  * they would reach the first station.
 218  *
 219  * @param ap First Vehicle pointer.
 220  * @param bp Second Vehicle pointer.
 221  * @return Comparison value.
 222  */
 223 static int CDECL VehicleTimetableSorter(Vehicle * const *ap, Vehicle * const *bp)
 224 {
 225         const Vehicle *a = *ap;
 226         const Vehicle *b = *bp;
 227
 228         VehicleOrderID a_order = a->cur_real_order_index;
 229         VehicleOrderID b_order = b->cur_real_order_index;
 230         int j = (int)b_order - (int)a_order;
 231
 232         /* Are we currently at an ordered station (un)loading? */
 233         bool a_load = a->current_order.IsType(OT_LOADING) && a->current_order.GetNonStopType() != ONSF_STOP_EVERYWHERE;
 234         bool b_load = b->current_order.IsType(OT_LOADING) && b->current_order.GetNonStopType() != ONSF_STOP_EVERYWHERE;
 235
 236         /* If the current order is not loading at the ordered station, decrease the order index by one since we have
 237          * not yet arrived at the station (and thus the timetable entry; still in the travelling of the previous one).
 238          * Since the ?_order variables are unsigned the -1 will flow under and place the vehicles going to order #0 at
 239          * the begin of the list with vehicles arriving at #0. */
 240         if (!a_load) a_order--;
 241         if (!b_load) b_order--;
 242
 243         /* First check the order index that accounted for loading, then just the raw one. */
 244         int i = (int)b_order - (int)a_order;
 245         if (i != 0) return i;
 246         if (j != 0) return j;
 247
 248         /* Look at the time we spent in this order; the higher, the closer to its destination. */
 249         i = b->current_order_time - a->current_order_time;
 250         if (i != 0) return i;
 251
 252         /* If all else is equal, use some unique index to sort it the same way. */
 253         return b->unitnumber - a->unitnumber;
 254 }
 255
 256 /**
 257  * Set the start date of the timetable.
 258  * @param tile Not used.
 259  * @param flags Operation to perform.
 260  * @param p2 Various bitstuffed elements
 261  * - p2 = (bit 0-19) - Vehicle ID.
 262  * - p2 = (bit 20)   - Set to 1 to set timetable start for all vehicles sharing this order
 263  * @param p2 The timetable start date.
 264  * @param text Not used.
 265  * @return The error or cost of the operation.
 266  */
 267 CommandCost CmdSetTimetableStart(TileIndex tile, DoCommandFlag flags, uint32 p1, uint32 p2, const char *text)
 268 {
 269         bool timetable_all = HasBit(p1, 20);
 270         Vehicle *v = Vehicle::GetIfValid(GB(p1, 0, 20));
 271         if (v == nullptr || !v->IsPrimaryVehicle() || v->orders.list == nullptr) return CMD_ERROR;
 272
 273         CommandCost ret = CheckOwnership(v->owner);
 274         if (ret.Failed()) return ret;
 275
 276         /* Don't let a timetable start more than 15 years into the future or 1 year in the past. */
 277         Date start_date = (Date)p2;
 278         if (start_date < 0 || start_date > MAX_DAY) return CMD_ERROR;
 279         if (start_date - _date > 15 * DAYS_IN_LEAP_YEAR) return CMD_ERROR;
 280         if (_date - start_date > DAYS_IN_LEAP_YEAR) return CMD_ERROR;
 281         if (timetable_all && !v->orders.list->IsCompleteTimetable()) return CMD_ERROR;
 282
 283         if (flags & DC_EXEC) {
 284                 std::vector<Vehicle *> vehs;
 285
 286                 if (timetable_all) {
 287                         for (Vehicle *w = v->orders.list->GetFirstSharedVehicle(); w != nullptr; w = w->NextShared()) {
 288                                 vehs.push_back(w);
 289                         }
 290                 } else {
 291                         vehs.push_back(v);
 292                 }
 293
 294                 int total_duration = v->orders.list->GetTimetableTotalDuration();
 295                 int num_vehs = (uint)vehs.size();
 296
 297                 if (num_vehs >= 2) {
 298                         QSortT(vehs.data(), vehs.size(), &VehicleTimetableSorter);
 299                 }
 300
 301                 int idx = vehs.begin() - std::find(vehs.begin(), vehs.end(), v);
 302
 303                 for (Vehicle *w : vehs) {
 304
 305                         w->lateness_counter = 0;
 306                         ClrBit(w->vehicle_flags, VF_TIMETABLE_STARTED);
 307                         /* Do multiplication, then division to reduce rounding errors. */
 308                         w->timetable_start = start_date + idx * total_duration / num_vehs / DAY_TICKS;
 309                         SetWindowDirty(WC_VEHICLE_TIMETABLE, w->index);
 310                         ++idx;
 311                 }
 312
 313         }
 314
 315         return CommandCost();
 316 }
 317
 318
 319 /**
 320  * Start or stop filling the timetable automatically from the time the vehicle
 321  * actually takes to complete it. When starting to autofill the current times
 322  * are cleared and the timetable will start again from scratch.
 323  * @param tile Not used.
 324  * @param flags Operation to perform.
 325  * @param p1 Vehicle index.
 326  * @param p2 Various bitstuffed elements
 327  * - p2 = (bit 0) - Set to 1 to enable, 0 to disable autofill.
 328  * - p2 = (bit 1) - Set to 1 to preserve waiting times in non-destructive mode
 329  * @param text unused
 330  * @return the cost of this operation or an error
 331  */
 332 CommandCost CmdAutofillTimetable(TileIndex tile, DoCommandFlag flags, uint32 p1, uint32 p2, const char *text)
 333 {
 334         VehicleID veh = GB(p1, 0, 20);
 335
 336         Vehicle *v = Vehicle::GetIfValid(veh);
 337         if (v == nullptr || !v->IsPrimaryVehicle() || v->orders.list == nullptr) return CMD_ERROR;
 338
 339         CommandCost ret = CheckOwnership(v->owner);
 340         if (ret.Failed()) return ret;
 341
 342         if (flags & DC_EXEC) {
 343                 if (HasBit(p2, 0)) {
 344                         /* Start autofilling the timetable, which clears the
 345                          * "timetable has started" bit. Times are not cleared anymore, but are
 346                          * overwritten when the order is reached now. */
 347                         SetBit(v->vehicle_flags, VF_AUTOFILL_TIMETABLE);
 348                         ClrBit(v->vehicle_flags, VF_TIMETABLE_STARTED);
 349
 350                         /* Overwrite waiting times only if they got longer */
 351                         if (HasBit(p2, 1)) SetBit(v->vehicle_flags, VF_AUTOFILL_PRES_WAIT_TIME);
 352
 353                         v->timetable_start = 0;
 354                         v->lateness_counter = 0;
 355                 } else {
 356                         ClrBit(v->vehicle_flags, VF_AUTOFILL_TIMETABLE);
 357                         ClrBit(v->vehicle_flags, VF_AUTOFILL_PRES_WAIT_TIME);
 358                 }
 359
 360                 for (Vehicle *v2 = v->FirstShared(); v2 != nullptr; v2 = v2->NextShared()) {
 361                         if (v2 != v) {
 362                                 /* Stop autofilling; only one vehicle at a time can perform autofill */
 363                                 ClrBit(v2->vehicle_flags, VF_AUTOFILL_TIMETABLE);
 364                                 ClrBit(v2->vehicle_flags, VF_AUTOFILL_PRES_WAIT_TIME);
 365                         }
 366                         SetWindowDirty(WC_VEHICLE_TIMETABLE, v2->index);
 367                 }
 368         }
 369
 370         return CommandCost();
 371 }
 372
 373 /**
 374  * Update the timetable for the vehicle.
 375  * @param v The vehicle to update the timetable for.
 376  * @param travelling Whether we just travelled or waited at a station.
 377  */
 378 void UpdateVehicleTimetable(Vehicle *v, bool travelling)
 379 {
 380         uint time_taken = v->current_order_time;
 381
 382         v->current_order_time = 0;
 383
 384         if (v->current_order.IsType(OT_IMPLICIT)) return; // no timetabling of auto orders
 385
 386         if (v->cur_real_order_index >= v->GetNumOrders()) return;
 387         Order *real_current_order = v->GetOrder(v->cur_real_order_index);
 388
 389         VehicleOrderID first_manual_order = 0;
 390         for (Order *o = v->GetFirstOrder(); o != nullptr && o->IsType(OT_IMPLICIT); o = o->next) {
 391                 ++first_manual_order;
 392         }
 393
 394         bool just_started = false;
 395
 396         /* This vehicle is arriving at the first destination in the timetable. */
 397         if (v->cur_real_order_index == first_manual_order && travelling) {
 398                 /* If the start date hasn't been set, or it was set automatically when
 399                  * the vehicle last arrived at the first destination, update it to the
 400                  * current time. Otherwise set the late counter appropriately to when
 401                  * the vehicle should have arrived. */
 402                 just_started = !HasBit(v->vehicle_flags, VF_TIMETABLE_STARTED);
 403
 404                 if (v->timetable_start != 0) {
 405                         v->lateness_counter = (_date - v->timetable_start) * DAY_TICKS + _date_fract;
 406                         v->timetable_start = 0;
 407                 }
 408
 409                 SetBit(v->vehicle_flags, VF_TIMETABLE_STARTED);
 410                 SetWindowDirty(WC_VEHICLE_TIMETABLE, v->index);
 411         }
 412
 413         if (!HasBit(v->vehicle_flags, VF_TIMETABLE_STARTED)) return;
 414
 415         bool autofilling = HasBit(v->vehicle_flags, VF_AUTOFILL_TIMETABLE);
 416         bool remeasure_wait_time = !real_current_order->IsWaitTimetabled() ||
 417                         (autofilling && !HasBit(v->vehicle_flags, VF_AUTOFILL_PRES_WAIT_TIME));
 418
 419         if (travelling && remeasure_wait_time) {
 420                 /* We just finished travelling and want to remeasure the loading time,
 421                  * so do not apply any restrictions for the loading to finish. */
 422                 v->current_order.SetWaitTime(0);
 423         }
 424
 425         if (just_started) return;
 426
 427         /* Before modifying waiting times, check whether we want to preserve bigger ones. */
 428         if (!real_current_order->IsType(OT_CONDITIONAL) &&
 429                         (travelling || time_taken > real_current_order->GetWaitTime() || remeasure_wait_time)) {
 430                 /* Round the time taken up to the nearest day, as this will avoid
 431                  * confusion for people who are timetabling in days, and can be
 432                  * adjusted later by people who aren't.
 433                  * For trains/aircraft multiple movement cycles are done in one
 434                  * tick. This makes it possible to leave the station and process
 435                  * e.g. a depot order in the same tick, causing it to not fill
 436                  * the timetable entry like is done for road vehicles/ships.
 437                  * Thus always make sure at least one tick is used between the
 438                  * processing of different orders when filling the timetable. */
 439                 uint time_to_set = CeilDiv(max(time_taken, 1U), DAY_TICKS) * DAY_TICKS;
 440
 441                 if (travelling && (autofilling || !real_current_order->IsTravelTimetabled())) {
 442                         ChangeTimetable(v, v->cur_real_order_index, time_to_set, MTF_TRAVEL_TIME, autofilling);
 443                 } else if (!travelling && (autofilling || !real_current_order->IsWaitTimetabled())) {
 444                         ChangeTimetable(v, v->cur_real_order_index, time_to_set, MTF_WAIT_TIME, autofilling);
 445                 }
 446         }
 447
 448         if (v->cur_real_order_index == first_manual_order && travelling) {
 449                 /* If we just started we would have returned earlier and have not reached
 450                  * this code. So obviously, we have completed our round: So turn autofill
 451                  * off again. */
 452                 ClrBit(v->vehicle_flags, VF_AUTOFILL_TIMETABLE);
 453                 ClrBit(v->vehicle_flags, VF_AUTOFILL_PRES_WAIT_TIME);
 454         }
 455
 456         if (autofilling) return;
 457
 458         uint timetabled = travelling ? real_current_order->GetTimetabledTravel() :
 459                         real_current_order->GetTimetabledWait();
 460
 461         /* Vehicles will wait at stations if they arrive early even if they are not
 462          * timetabled to wait there, so make sure the lateness counter is updated
 463          * when this happens. */
 464         if (timetabled == 0 && (travelling || v->lateness_counter >= 0)) return;
 465
 466         v->lateness_counter -= (timetabled - time_taken);
 467
 468         /* When we are more late than this timetabled bit takes we (somewhat expensively)
 469          * check how many ticks the (fully filled) timetable has. If a timetable cycle is
 470          * shorter than the amount of ticks we are late we reduce the lateness by the
 471          * length of a full cycle till lateness is less than the length of a timetable
 472          * cycle. When the timetable isn't fully filled the cycle will be INVALID_TICKS. */
 473         if (v->lateness_counter > (int)timetabled) {
 474                 Ticks cycle = v->orders.list->GetTimetableTotalDuration();
 475                 if (cycle != INVALID_TICKS && v->lateness_counter > cycle) {
 476                         v->lateness_counter %= cycle;
 477                 }
 478         }
 479
 480         for (v = v->FirstShared(); v != nullptr; v = v->NextShared()) {
 481                 SetWindowDirty(WC_VEHICLE_TIMETABLE, v->index);
 482         }
 483 }