src/timetable_cmd.cpp

   1 /*
   2  * This file is part of OpenTTD.
   3  * 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.
   4  * 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.
   5  * 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/>.
   6  */
   7
   8 /** @file timetable_cmd.cpp Commands related to time tabling. */
   9
  10 #include "stdafx.h"
  11 #include "command_func.h"
  12 #include "company_func.h"
  13 #include "date_func.h"
  14 #include "window_func.h"
  15 #include "vehicle_base.h"
  16 #include "cmd_helper.h"
  17
  18 #include "table/strings.h"
  19
  20 #include "safeguards.h"
  21
  22 /**
  23  * Change/update a particular timetable entry.
  24  * @param v            The vehicle to change the timetable of.
  25  * @param order_number The index of the timetable in the order list.
  26  * @param val          The new data of the timetable entry.
  27  * @param mtf          Which part of the timetable entry to change.
  28  * @param timetabled   If the new value is explicitly timetabled.
  29  */
  30 static void ChangeTimetable(Vehicle *v, VehicleOrderID order_number, uint16 val, ModifyTimetableFlags mtf, bool timetabled)
  31 {
  32         Order *order = v->GetOrder(order_number);
  33         int total_delta = 0;
  34         int timetable_delta = 0;
  35
  36         switch (mtf) {
  37                 case MTF_WAIT_TIME:
  38                         total_delta = val - order->GetWaitTime();
  39                         timetable_delta = (timetabled ? val : 0) - order->GetTimetabledWait();
  40                         order->SetWaitTime(val);
  41                         order->SetWaitTimetabled(timetabled);
  42                         break;
  43
  44                 case MTF_TRAVEL_TIME:
  45                         total_delta = val - order->GetTravelTime();
  46                         timetable_delta = (timetabled ? val : 0) - order->GetTimetabledTravel();
  47                         order->SetTravelTime(val);
  48                         order->SetTravelTimetabled(timetabled);
  49                         break;
  50
  51                 case MTF_TRAVEL_SPEED:
  52                         order->SetMaxSpeed(val);
  53                         break;
  54
  55                 default:
  56                         NOT_REACHED();
  57         }
  58         v->orders.list->UpdateTotalDuration(total_delta);
  59         v->orders.list->UpdateTimetableDuration(timetable_delta);
  60
  61         for (v = v->FirstShared(); v != nullptr; v = v->NextShared()) {
  62                 if (v->cur_real_order_index == order_number && v->current_order.Equals(*order)) {
  63                         switch (mtf) {
  64                                 case MTF_WAIT_TIME:
  65                                         v->current_order.SetWaitTime(val);
  66                                         v->current_order.SetWaitTimetabled(timetabled);
  67                                         break;
  68
  69                                 case MTF_TRAVEL_TIME:
  70                                         v->current_order.SetTravelTime(val);
  71                                         v->current_order.SetTravelTimetabled(timetabled);
  72                                         break;
  73
  74                                 case MTF_TRAVEL_SPEED:
  75                                         v->current_order.SetMaxSpeed(val);
  76                                         break;
  77
  78                                 default:
  79                                         NOT_REACHED();
  80                         }
  81                 }
  82                 SetWindowDirty(WC_VEHICLE_TIMETABLE, v->index);
  83         }
  84 }
  85
  86 /**
  87  * Change timetable data of an order.
  88  * @param tile Not used.
  89  * @param flags Operation to perform.
  90  * @param p1 Various bitstuffed elements
  91  * - p1 = (bit  0-19) - Vehicle with the orders to change.
  92  * - p1 = (bit 20-27) - Order index to modify.
  93  * - p1 = (bit 28-29) - Timetable data to change (@see ModifyTimetableFlags)
  94  * @param p2 The amount of time to wait.
  95  * - p2 = (bit  0-15) - The data to modify as specified by p1 bits 28-29.
  96  *                      0 to clear times, UINT16_MAX to clear speed limit.
  97  * @param text unused
  98  * @return the cost of this operation or an error
  99  */
 100 CommandCost CmdChangeTimetable(TileIndex tile, DoCommandFlag flags, uint32 p1, uint32 p2, const std::string &text)
 101 {
 102         VehicleID veh = GB(p1, 0, 20);
 103
 104         Vehicle *v = Vehicle::GetIfValid(veh);
 105         if (v == nullptr || !v->IsPrimaryVehicle()) return CMD_ERROR;
 106
 107         CommandCost ret = CheckOwnership(v->owner);
 108         if (ret.Failed()) return ret;
 109
 110         VehicleOrderID order_number = GB(p1, 20, 8);
 111         Order *order = v->GetOrder(order_number);
 112         if (order == nullptr || order->IsType(OT_IMPLICIT)) return CMD_ERROR;
 113
 114         ModifyTimetableFlags mtf = Extract<ModifyTimetableFlags, 28, 2>(p1);
 115         if (mtf >= MTF_END) return CMD_ERROR;
 116
 117         int wait_time   = order->GetWaitTime();
 118         int travel_time = order->GetTravelTime();
 119         int max_speed   = order->GetMaxSpeed();
 120         switch (mtf) {
 121                 case MTF_WAIT_TIME:
 122                         wait_time = GB(p2, 0, 16);
 123                         break;
 124
 125                 case MTF_TRAVEL_TIME:
 126                         travel_time = GB(p2, 0, 16);
 127                         break;
 128
 129                 case MTF_TRAVEL_SPEED:
 130                         max_speed = GB(p2, 0, 16);
 131                         if (max_speed == 0) max_speed = UINT16_MAX; // Disable speed limit.
 132                         break;
 133
 134                 default:
 135                         NOT_REACHED();
 136         }
 137
 138         if (wait_time != order->GetWaitTime()) {
 139                 switch (order->GetType()) {
 140                         case OT_GOTO_STATION:
 141                                 if (order->GetNonStopType() & ONSF_NO_STOP_AT_DESTINATION_STATION) return_cmd_error(STR_ERROR_TIMETABLE_NOT_STOPPING_HERE);
 142                                 break;
 143
 144                         case OT_CONDITIONAL:
 145                                 break;
 146
 147                         default: return_cmd_error(STR_ERROR_TIMETABLE_ONLY_WAIT_AT_STATIONS);
 148                 }
 149         }
 150
 151         if (travel_time != order->GetTravelTime() && order->IsType(OT_CONDITIONAL)) return CMD_ERROR;
 152         if (max_speed != order->GetMaxSpeed() && (order->IsType(OT_CONDITIONAL) || v->type == VEH_AIRCRAFT)) return CMD_ERROR;
 153
 154         if (flags & DC_EXEC) {
 155                 switch (mtf) {
 156                         case MTF_WAIT_TIME:
 157                                 /* Set time if changing the value or confirming an estimated time as timetabled. */
 158                                 if (wait_time != order->GetWaitTime() || (wait_time > 0 && !order->IsWaitTimetabled())) {
 159                                         ChangeTimetable(v, order_number, wait_time, MTF_WAIT_TIME, wait_time > 0);
 160                                 }
 161                                 break;
 162
 163                         case MTF_TRAVEL_TIME:
 164                                 /* Set time if changing the value or confirming an estimated time as timetabled. */
 165                                 if (travel_time != order->GetTravelTime() || (travel_time > 0 && !order->IsTravelTimetabled())) {
 166                                         ChangeTimetable(v, order_number, travel_time, MTF_TRAVEL_TIME, travel_time > 0);
 167                                 }
 168                                 break;
 169
 170                         case MTF_TRAVEL_SPEED:
 171                                 if (max_speed != order->GetMaxSpeed()) {
 172                                         ChangeTimetable(v, order_number, max_speed, MTF_TRAVEL_SPEED, max_speed != UINT16_MAX);
 173                                 }
 174                                 break;
 175
 176                         default:
 177                                 break;
 178                 }
 179         }
 180
 181         return CommandCost();
 182 }
 183
 184 /**
 185  * Clear the lateness counter to make the vehicle on time.
 186  * @param tile Not used.
 187  * @param flags Operation to perform.
 188  * @param p1 Various bitstuffed elements
 189  * - p1 = (bit  0-19) - Vehicle with the orders to change.
 190  * @param p2 unused
 191  * @param text unused
 192  * @return the cost of this operation or an error
 193  */
 194 CommandCost CmdSetVehicleOnTime(TileIndex tile, DoCommandFlag flags, uint32 p1, uint32 p2, const std::string &text)
 195 {
 196         VehicleID veh = GB(p1, 0, 20);
 197
 198         Vehicle *v = Vehicle::GetIfValid(veh);
 199         if (v == nullptr || !v->IsPrimaryVehicle() || v->orders.list == nullptr) return CMD_ERROR;
 200
 201         CommandCost ret = CheckOwnership(v->owner);
 202         if (ret.Failed()) return ret;
 203
 204         if (flags & DC_EXEC) {
 205                 v->lateness_counter = 0;
 206                 SetWindowDirty(WC_VEHICLE_TIMETABLE, v->index);
 207         }
 208
 209         return CommandCost();
 210 }
 211
 212 /**
 213  * Order vehicles based on their timetable. The vehicles will be sorted in order
 214  * they would reach the first station.
 215  *
 216  * @param a First Vehicle pointer.
 217  * @param b Second Vehicle pointer.
 218  * @return Comparison value.
 219  */
 220 static bool VehicleTimetableSorter(Vehicle * const &a, Vehicle * const &b)
 221 {
 222         VehicleOrderID a_order = a->cur_real_order_index;
 223         VehicleOrderID b_order = b->cur_real_order_index;
 224         int j = (int)b_order - (int)a_order;
 225
 226         /* Are we currently at an ordered station (un)loading? */
 227         bool a_load = a->current_order.IsType(OT_LOADING) && a->current_order.GetNonStopType() != ONSF_STOP_EVERYWHERE;
 228         bool b_load = b->current_order.IsType(OT_LOADING) && b->current_order.GetNonStopType() != ONSF_STOP_EVERYWHERE;
 229
 230         /* If the current order is not loading at the ordered station, decrease the order index by one since we have
 231          * not yet arrived at the station (and thus the timetable entry; still in the travelling of the previous one).
 232          * Since the ?_order variables are unsigned the -1 will flow under and place the vehicles going to order #0 at
 233          * the begin of the list with vehicles arriving at #0. */
 234         if (!a_load) a_order--;
 235         if (!b_load) b_order--;
 236
 237         /* First check the order index that accounted for loading, then just the raw one. */
 238         int i = (int)b_order - (int)a_order;
 239         if (i != 0) return i < 0;
 240         if (j != 0) return j < 0;
 241
 242         /* Look at the time we spent in this order; the higher, the closer to its destination. */
 243         i = b->current_order_time - a->current_order_time;
 244         if (i != 0) return i < 0;
 245
 246         /* If all else is equal, use some unique index to sort it the same way. */
 247         return b->unitnumber < a->unitnumber;
 248 }
 249
 250 /**
 251  * Set the start date of the timetable.
 252  * @param tile Not used.
 253  * @param flags Operation to perform.
 254  * @param p2 Various bitstuffed elements
 255  * - p2 = (bit 0-19) - Vehicle ID.
 256  * - p2 = (bit 20)   - Set to 1 to set timetable start for all vehicles sharing this order
 257  * @param p2 The timetable start date.
 258  * @param text Not used.
 259  * @return The error or cost of the operation.
 260  */
 261 CommandCost CmdSetTimetableStart(TileIndex tile, DoCommandFlag flags, uint32 p1, uint32 p2, const std::string &text)
 262 {
 263         bool timetable_all = HasBit(p1, 20);
 264         Vehicle *v = Vehicle::GetIfValid(GB(p1, 0, 20));
 265         if (v == nullptr || !v->IsPrimaryVehicle() || v->orders.list == nullptr) return CMD_ERROR;
 266
 267         CommandCost ret = CheckOwnership(v->owner);
 268         if (ret.Failed()) return ret;
 269
 270         /* Don't let a timetable start more than 15 years into the future or 1 year in the past. */
 271         Date start_date = (Date)p2;
 272         if (start_date < 0 || start_date > MAX_DAY) return CMD_ERROR;
 273         if (start_date - _date > 15 * DAYS_IN_LEAP_YEAR) return CMD_ERROR;
 274         if (_date - start_date > DAYS_IN_LEAP_YEAR) return CMD_ERROR;
 275         if (timetable_all && !v->orders.list->IsCompleteTimetable()) return CMD_ERROR;
 276
 277         if (flags & DC_EXEC) {
 278                 std::vector<Vehicle *> vehs;
 279
 280                 if (timetable_all) {
 281                         for (Vehicle *w = v->orders.list->GetFirstSharedVehicle(); w != nullptr; w = w->NextShared()) {
 282                                 vehs.push_back(w);
 283                         }
 284                 } else {
 285                         vehs.push_back(v);
 286                 }
 287
 288                 int total_duration = v->orders.list->GetTimetableTotalDuration();
 289                 int num_vehs = (uint)vehs.size();
 290
 291                 if (num_vehs >= 2) {
 292                         std::sort(vehs.begin(), vehs.end(), &VehicleTimetableSorter);
 293                 }
 294
 295                 int idx = vehs.begin() - std::find(vehs.begin(), vehs.end(), v);
 296
 297                 for (Vehicle *w : vehs) {
 298
 299                         w->lateness_counter = 0;
 300                         ClrBit(w->vehicle_flags, VF_TIMETABLE_STARTED);
 301                         /* Do multiplication, then division to reduce rounding errors. */
 302                         w->timetable_start = start_date + idx * total_duration / num_vehs / DAY_TICKS;
 303                         SetWindowDirty(WC_VEHICLE_TIMETABLE, w->index);
 304                         ++idx;
 305                 }
 306
 307         }
 308
 309         return CommandCost();
 310 }
 311
 312
 313 /**
 314  * Start or stop filling the timetable automatically from the time the vehicle
 315  * actually takes to complete it. When starting to autofill the current times
 316  * are cleared and the timetable will start again from scratch.
 317  * @param tile Not used.
 318  * @param flags Operation to perform.
 319  * @param p1 Vehicle index.
 320  * @param p2 Various bitstuffed elements
 321  * - p2 = (bit 0) - Set to 1 to enable, 0 to disable autofill.
 322  * - p2 = (bit 1) - Set to 1 to preserve waiting times in non-destructive mode
 323  * @param text unused
 324  * @return the cost of this operation or an error
 325  */
 326 CommandCost CmdAutofillTimetable(TileIndex tile, DoCommandFlag flags, uint32 p1, uint32 p2, const std::string &text)
 327 {
 328         VehicleID veh = GB(p1, 0, 20);
 329
 330         Vehicle *v = Vehicle::GetIfValid(veh);
 331         if (v == nullptr || !v->IsPrimaryVehicle() || v->orders.list == nullptr) return CMD_ERROR;
 332
 333         CommandCost ret = CheckOwnership(v->owner);
 334         if (ret.Failed()) return ret;
 335
 336         if (flags & DC_EXEC) {
 337                 if (HasBit(p2, 0)) {
 338                         /* Start autofilling the timetable, which clears the
 339                          * "timetable has started" bit. Times are not cleared anymore, but are
 340                          * overwritten when the order is reached now. */
 341                         SetBit(v->vehicle_flags, VF_AUTOFILL_TIMETABLE);
 342                         ClrBit(v->vehicle_flags, VF_TIMETABLE_STARTED);
 343
 344                         /* Overwrite waiting times only if they got longer */
 345                         if (HasBit(p2, 1)) SetBit(v->vehicle_flags, VF_AUTOFILL_PRES_WAIT_TIME);
 346
 347                         v->timetable_start = 0;
 348                         v->lateness_counter = 0;
 349                 } else {
 350                         ClrBit(v->vehicle_flags, VF_AUTOFILL_TIMETABLE);
 351                         ClrBit(v->vehicle_flags, VF_AUTOFILL_PRES_WAIT_TIME);
 352                 }
 353
 354                 for (Vehicle *v2 = v->FirstShared(); v2 != nullptr; v2 = v2->NextShared()) {
 355                         if (v2 != v) {
 356                                 /* Stop autofilling; only one vehicle at a time can perform autofill */
 357                                 ClrBit(v2->vehicle_flags, VF_AUTOFILL_TIMETABLE);
 358                                 ClrBit(v2->vehicle_flags, VF_AUTOFILL_PRES_WAIT_TIME);
 359                         }
 360                         SetWindowDirty(WC_VEHICLE_TIMETABLE, v2->index);
 361                 }
 362         }
 363
 364         return CommandCost();
 365 }
 366
 367 /**
 368  * Update the timetable for the vehicle.
 369  * @param v The vehicle to update the timetable for.
 370  * @param travelling Whether we just travelled or waited at a station.
 371  */
 372 void UpdateVehicleTimetable(Vehicle *v, bool travelling)
 373 {
 374         uint time_taken = v->current_order_time;
 375
 376         v->current_order_time = 0;
 377
 378         if (v->current_order.IsType(OT_IMPLICIT)) return; // no timetabling of auto orders
 379
 380         if (v->cur_real_order_index >= v->GetNumOrders()) return;
 381         Order *real_current_order = v->GetOrder(v->cur_real_order_index);
 382
 383         VehicleOrderID first_manual_order = 0;
 384         for (Order *o = v->GetFirstOrder(); o != nullptr && o->IsType(OT_IMPLICIT); o = o->next) {
 385                 ++first_manual_order;
 386         }
 387
 388         bool just_started = false;
 389
 390         /* This vehicle is arriving at the first destination in the timetable. */
 391         if (v->cur_real_order_index == first_manual_order && travelling) {
 392                 /* If the start date hasn't been set, or it was set automatically when
 393                  * the vehicle last arrived at the first destination, update it to the
 394                  * current time. Otherwise set the late counter appropriately to when
 395                  * the vehicle should have arrived. */
 396                 just_started = !HasBit(v->vehicle_flags, VF_TIMETABLE_STARTED);
 397
 398                 if (v->timetable_start != 0) {
 399                         v->lateness_counter = (_date - v->timetable_start) * DAY_TICKS + _date_fract;
 400                         v->timetable_start = 0;
 401                 }
 402
 403                 SetBit(v->vehicle_flags, VF_TIMETABLE_STARTED);
 404                 SetWindowDirty(WC_VEHICLE_TIMETABLE, v->index);
 405         }
 406
 407         if (!HasBit(v->vehicle_flags, VF_TIMETABLE_STARTED)) return;
 408
 409         bool autofilling = HasBit(v->vehicle_flags, VF_AUTOFILL_TIMETABLE);
 410         bool remeasure_wait_time = !real_current_order->IsWaitTimetabled() ||
 411                         (autofilling && !HasBit(v->vehicle_flags, VF_AUTOFILL_PRES_WAIT_TIME));
 412
 413         if (travelling && remeasure_wait_time) {
 414                 /* We just finished travelling and want to remeasure the loading time,
 415                  * so do not apply any restrictions for the loading to finish. */
 416                 v->current_order.SetWaitTime(0);
 417         }
 418
 419         if (just_started) return;
 420
 421         /* Before modifying waiting times, check whether we want to preserve bigger ones. */
 422         if (!real_current_order->IsType(OT_CONDITIONAL) &&
 423                         (travelling || time_taken > real_current_order->GetWaitTime() || remeasure_wait_time)) {
 424                 /* Round the time taken up to the nearest day, as this will avoid
 425                  * confusion for people who are timetabling in days, and can be
 426                  * adjusted later by people who aren't.
 427                  * For trains/aircraft multiple movement cycles are done in one
 428                  * tick. This makes it possible to leave the station and process
 429                  * e.g. a depot order in the same tick, causing it to not fill
 430                  * the timetable entry like is done for road vehicles/ships.
 431                  * Thus always make sure at least one tick is used between the
 432                  * processing of different orders when filling the timetable. */
 433                 uint time_to_set = CeilDiv(std::max(time_taken, 1U), DAY_TICKS) * DAY_TICKS;
 434
 435                 if (travelling && (autofilling || !real_current_order->IsTravelTimetabled())) {
 436                         ChangeTimetable(v, v->cur_real_order_index, time_to_set, MTF_TRAVEL_TIME, autofilling);
 437                 } else if (!travelling && (autofilling || !real_current_order->IsWaitTimetabled())) {
 438                         ChangeTimetable(v, v->cur_real_order_index, time_to_set, MTF_WAIT_TIME, autofilling);
 439                 }
 440         }
 441
 442         if (v->cur_real_order_index == first_manual_order && travelling) {
 443                 /* If we just started we would have returned earlier and have not reached
 444                  * this code. So obviously, we have completed our round: So turn autofill
 445                  * off again. */
 446                 ClrBit(v->vehicle_flags, VF_AUTOFILL_TIMETABLE);
 447                 ClrBit(v->vehicle_flags, VF_AUTOFILL_PRES_WAIT_TIME);
 448         }
 449
 450         if (autofilling) return;
 451
 452         uint timetabled = travelling ? real_current_order->GetTimetabledTravel() :
 453                         real_current_order->GetTimetabledWait();
 454
 455         /* Vehicles will wait at stations if they arrive early even if they are not
 456          * timetabled to wait there, so make sure the lateness counter is updated
 457          * when this happens. */
 458         if (timetabled == 0 && (travelling || v->lateness_counter >= 0)) return;
 459
 460         v->lateness_counter -= (timetabled - time_taken);
 461
 462         /* When we are more late than this timetabled bit takes we (somewhat expensively)
 463          * check how many ticks the (fully filled) timetable has. If a timetable cycle is
 464          * shorter than the amount of ticks we are late we reduce the lateness by the
 465          * length of a full cycle till lateness is less than the length of a timetable
 466          * cycle. When the timetable isn't fully filled the cycle will be INVALID_TICKS. */
 467         if (v->lateness_counter > (int)timetabled) {
 468                 Ticks cycle = v->orders.list->GetTimetableTotalDuration();
 469                 if (cycle != INVALID_TICKS && v->lateness_counter > cycle) {
 470                         v->lateness_counter %= cycle;
 471                 }
 472         }
 473
 474         for (v = v->FirstShared(); v != nullptr; v = v->NextShared()) {
 475                 SetWindowDirty(WC_VEHICLE_TIMETABLE, v->index);
 476         }
 477 }