ship_cmd.cpp

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00001 /* $Id: ship_cmd.cpp 21954 2011-02-04 14:37:24Z rubidium $ */
00002 
00003 /*
00004  * This file is part of OpenTTD.
00005  * 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.
00006  * 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.
00007  * 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/>.
00008  */
00009 
00012 #include "stdafx.h"
00013 #include "ship.h"
00014 #include "landscape.h"
00015 #include "timetable.h"
00016 #include "news_func.h"
00017 #include "company_func.h"
00018 #include "pathfinder/npf/npf_func.h"
00019 #include "depot_base.h"
00020 #include "station_base.h"
00021 #include "vehicle_gui.h"
00022 #include "newgrf_engine.h"
00023 #include "pathfinder/yapf/yapf.h"
00024 #include "newgrf_sound.h"
00025 #include "spritecache.h"
00026 #include "strings_func.h"
00027 #include "functions.h"
00028 #include "window_func.h"
00029 #include "date_func.h"
00030 #include "vehicle_func.h"
00031 #include "sound_func.h"
00032 #include "ai/ai.hpp"
00033 #include "pathfinder/opf/opf_ship.h"
00034 #include "engine_base.h"
00035 #include "company_base.h"
00036 
00037 #include "table/strings.h"
00038 
00039 static const uint16 _ship_sprites[] = {0x0E5D, 0x0E55, 0x0E65, 0x0E6D};
00040 
00041 static inline TrackBits GetTileShipTrackStatus(TileIndex tile)
00042 {
00043   return TrackStatusToTrackBits(GetTileTrackStatus(tile, TRANSPORT_WATER, 0));
00044 }
00045 
00046 static SpriteID GetShipIcon(EngineID engine)
00047 {
00048   const Engine *e = Engine::Get(engine);
00049   uint8 spritenum = e->u.ship.image_index;
00050 
00051   if (is_custom_sprite(spritenum)) {
00052     SpriteID sprite = GetCustomVehicleIcon(engine, DIR_W);
00053     if (sprite != 0) return sprite;
00054 
00055     spritenum = e->original_image_index;
00056   }
00057 
00058   return DIR_W + _ship_sprites[spritenum];
00059 }
00060 
00061 void DrawShipEngine(int left, int right, int preferred_x, int y, EngineID engine, PaletteID pal)
00062 {
00063   SpriteID sprite = GetShipIcon(engine);
00064   const Sprite *real_sprite = GetSprite(sprite, ST_NORMAL);
00065   preferred_x = Clamp(preferred_x, left - real_sprite->x_offs, right - real_sprite->width - real_sprite->x_offs);
00066   DrawSprite(sprite, pal, preferred_x, y);
00067 }
00068 
00075 void GetShipSpriteSize(EngineID engine, uint &width, uint &height)
00076 {
00077   const Sprite *spr = GetSprite(GetShipIcon(engine), ST_NORMAL);
00078 
00079   width  = spr->width;
00080   height = spr->height;
00081 }
00082 
00083 SpriteID Ship::GetImage(Direction direction) const
00084 {
00085   uint8 spritenum = this->spritenum;
00086 
00087   if (is_custom_sprite(spritenum)) {
00088     SpriteID sprite = GetCustomVehicleSprite(this, direction);
00089     if (sprite != 0) return sprite;
00090 
00091     spritenum = Engine::Get(this->engine_type)->original_image_index;
00092   }
00093 
00094   return _ship_sprites[spritenum] + direction;
00095 }
00096 
00097 static const Depot *FindClosestShipDepot(const Vehicle *v, uint max_distance)
00098 {
00099   /* Find the closest depot */
00100   const Depot *depot;
00101   const Depot *best_depot = NULL;
00102   /* If we don't have a maximum distance, i.e. distance = 0,
00103    * we want to find any depot so the best distance of no
00104    * depot must be more than any correct distance. On the
00105    * other hand if we have set a maximum distance, any depot
00106    * further away than max_distance can safely be ignored. */
00107   uint best_dist = max_distance == 0 ? UINT_MAX : max_distance + 1;
00108 
00109   FOR_ALL_DEPOTS(depot) {
00110     TileIndex tile = depot->xy;
00111     if (IsShipDepotTile(tile) && IsTileOwner(tile, v->owner)) {
00112       uint dist = DistanceManhattan(tile, v->tile);
00113       if (dist < best_dist) {
00114         best_dist = dist;
00115         best_depot = depot;
00116       }
00117     }
00118   }
00119 
00120   return best_depot;
00121 }
00122 
00123 static void CheckIfShipNeedsService(Vehicle *v)
00124 {
00125   if (Company::Get(v->owner)->settings.vehicle.servint_ships == 0 || !v->NeedsAutomaticServicing()) return;
00126   if (v->IsInDepot()) {
00127     VehicleServiceInDepot(v);
00128     return;
00129   }
00130 
00131   uint max_distance;
00132   switch (_settings_game.pf.pathfinder_for_ships) {
00133     case VPF_OPF:  max_distance = 12; break;
00134     case VPF_NPF:  max_distance = _settings_game.pf.npf.maximum_go_to_depot_penalty  / NPF_TILE_LENGTH;  break;
00135     case VPF_YAPF: max_distance = _settings_game.pf.yapf.maximum_go_to_depot_penalty / YAPF_TILE_LENGTH; break;
00136     default: NOT_REACHED();
00137   }
00138 
00139   const Depot *depot = FindClosestShipDepot(v, max_distance);
00140 
00141   if (depot == NULL) {
00142     if (v->current_order.IsType(OT_GOTO_DEPOT)) {
00143       v->current_order.MakeDummy();
00144       SetWindowWidgetDirty(WC_VEHICLE_VIEW, v->index, VVW_WIDGET_START_STOP_VEH);
00145     }
00146     return;
00147   }
00148 
00149   v->current_order.MakeGoToDepot(depot->index, ODTFB_SERVICE);
00150   v->dest_tile = depot->xy;
00151   SetWindowWidgetDirty(WC_VEHICLE_VIEW, v->index, VVW_WIDGET_START_STOP_VEH);
00152 }
00153 
00154 void Ship::UpdateCache()
00155 {
00156   this->vcache.cached_max_speed = GetVehicleProperty(this, PROP_SHIP_SPEED, ShipVehInfo(this->engine_type)->max_speed);
00157 
00158   this->UpdateVisualEffect();
00159 }
00160 
00161 Money Ship::GetRunningCost() const
00162 {
00163   const Engine *e = Engine::Get(this->engine_type);
00164   uint cost_factor = GetVehicleProperty(this, PROP_SHIP_RUNNING_COST_FACTOR, e->u.ship.running_cost);
00165   return GetPrice(PR_RUNNING_SHIP, cost_factor, e->grf_prop.grffile);
00166 }
00167 
00168 void Ship::OnNewDay()
00169 {
00170   if ((++this->day_counter & 7) == 0) {
00171     DecreaseVehicleValue(this);
00172   }
00173 
00174   CheckVehicleBreakdown(this);
00175   AgeVehicle(this);
00176   CheckIfShipNeedsService(this);
00177 
00178   CheckOrders(this);
00179 
00180   if (this->running_ticks == 0) return;
00181 
00182   CommandCost cost(EXPENSES_SHIP_RUN, this->GetRunningCost() * this->running_ticks / (DAYS_IN_YEAR * DAY_TICKS));
00183 
00184   this->profit_this_year -= cost.GetCost();
00185   this->running_ticks = 0;
00186 
00187   SubtractMoneyFromCompanyFract(this->owner, cost);
00188 
00189   SetWindowDirty(WC_VEHICLE_DETAILS, this->index);
00190   /* we need this for the profit */
00191   SetWindowClassesDirty(WC_SHIPS_LIST);
00192 }
00193 
00194 Trackdir Ship::GetVehicleTrackdir() const
00195 {
00196   if (this->vehstatus & VS_CRASHED) return INVALID_TRACKDIR;
00197 
00198   if (this->IsInDepot()) {
00199     /* We'll assume the ship is facing outwards */
00200     return DiagDirToDiagTrackdir(GetShipDepotDirection(this->tile));
00201   }
00202 
00203   if (this->state == TRACK_BIT_WORMHOLE) {
00204     /* ship on aqueduct, so just use his direction and assume a diagonal track */
00205     return DiagDirToDiagTrackdir(DirToDiagDir(this->direction));
00206   }
00207 
00208   return TrackDirectionToTrackdir(FindFirstTrack(this->state), this->direction);
00209 }
00210 
00211 void Ship::MarkDirty()
00212 {
00213   this->UpdateViewport(false, false);
00214   this->UpdateCache();
00215 }
00216 
00217 static void PlayShipSound(const Vehicle *v)
00218 {
00219   if (!PlayVehicleSound(v, VSE_START)) {
00220     SndPlayVehicleFx(ShipVehInfo(v->engine_type)->sfx, v);
00221   }
00222 }
00223 
00224 void Ship::PlayLeaveStationSound() const
00225 {
00226   PlayShipSound(this);
00227 }
00228 
00229 TileIndex Ship::GetOrderStationLocation(StationID station)
00230 {
00231   if (station == this->last_station_visited) this->last_station_visited = INVALID_STATION;
00232 
00233   const Station *st = Station::Get(station);
00234   if (st->dock_tile != INVALID_TILE) {
00235     return TILE_ADD(st->dock_tile, ToTileIndexDiff(GetDockOffset(st->dock_tile)));
00236   } else {
00237     this->IncrementRealOrderIndex();
00238     return 0;
00239   }
00240 }
00241 
00242 void Ship::UpdateDeltaXY(Direction direction)
00243 {
00244 #define MKIT(a, b, c, d) ((a & 0xFF) << 24) | ((b & 0xFF) << 16) | ((c & 0xFF) << 8) | ((d & 0xFF) << 0)
00245   static const uint32 _delta_xy_table[8] = {
00246     MKIT( 6,  6,  -3,  -3),
00247     MKIT( 6, 32,  -3, -16),
00248     MKIT( 6,  6,  -3,  -3),
00249     MKIT(32,  6, -16,  -3),
00250     MKIT( 6,  6,  -3,  -3),
00251     MKIT( 6, 32,  -3, -16),
00252     MKIT( 6,  6,  -3,  -3),
00253     MKIT(32,  6, -16,  -3),
00254   };
00255 #undef MKIT
00256 
00257   uint32 x = _delta_xy_table[direction];
00258   this->x_offs        = GB(x,  0, 8);
00259   this->y_offs        = GB(x,  8, 8);
00260   this->x_extent      = GB(x, 16, 8);
00261   this->y_extent      = GB(x, 24, 8);
00262   this->z_extent      = 6;
00263 }
00264 
00265 static const TileIndexDiffC _ship_leave_depot_offs[] = {
00266   {-1,  0},
00267   { 0, -1}
00268 };
00269 
00270 static void CheckShipLeaveDepot(Ship *v)
00271 {
00272   if (!v->IsInDepot()) return;
00273 
00274   TileIndex tile = v->tile;
00275   Axis axis = GetShipDepotAxis(tile);
00276 
00277   /* Check first (north) side */
00278   if (DiagdirReachesTracks((DiagDirection)axis) & GetTileShipTrackStatus(TILE_ADD(tile, ToTileIndexDiff(_ship_leave_depot_offs[axis])))) {
00279     v->direction = ReverseDir(AxisToDirection(axis));
00280   /* Check second (south) side */
00281   } else if (DiagdirReachesTracks((DiagDirection)(axis + 2)) & GetTileShipTrackStatus(TILE_ADD(tile, -2 * ToTileIndexDiff(_ship_leave_depot_offs[axis])))) {
00282     v->direction = AxisToDirection(axis);
00283   } else {
00284     return;
00285   }
00286 
00287   v->state = AxisToTrackBits(axis);
00288   v->vehstatus &= ~VS_HIDDEN;
00289 
00290   v->cur_speed = 0;
00291   v->UpdateViewport(false, true);
00292   SetWindowDirty(WC_VEHICLE_DEPOT, v->tile);
00293 
00294   PlayShipSound(v);
00295   VehicleServiceInDepot(v);
00296   InvalidateWindowData(WC_VEHICLE_DEPOT, v->tile);
00297   SetWindowClassesDirty(WC_SHIPS_LIST);
00298 }
00299 
00300 static bool ShipAccelerate(Vehicle *v)
00301 {
00302   uint spd;
00303   byte t;
00304 
00305   spd = min(v->cur_speed + 1, v->vcache.cached_max_speed);
00306 
00307   /* updates statusbar only if speed have changed to save CPU time */
00308   if (spd != v->cur_speed) {
00309     v->cur_speed = spd;
00310     SetWindowWidgetDirty(WC_VEHICLE_VIEW, v->index, VVW_WIDGET_START_STOP_VEH);
00311   }
00312 
00313   /* Convert direction-indepenent speed into direction-dependent speed. (old movement method) */
00314   spd = v->GetOldAdvanceSpeed(spd);
00315 
00316   if (spd == 0) return false;
00317   if ((byte)++spd == 0) return true;
00318 
00319   v->progress = (t = v->progress) - (byte)spd;
00320 
00321   return (t < v->progress);
00322 }
00323 
00329 static void ShipArrivesAt(const Vehicle *v, Station *st)
00330 {
00331   /* Check if station was ever visited before */
00332   if (!(st->had_vehicle_of_type & HVOT_SHIP)) {
00333     st->had_vehicle_of_type |= HVOT_SHIP;
00334 
00335     SetDParam(0, st->index);
00336     AddVehicleNewsItem(
00337       STR_NEWS_FIRST_SHIP_ARRIVAL,
00338       (v->owner == _local_company) ? NS_ARRIVAL_COMPANY : NS_ARRIVAL_OTHER,
00339       v->index,
00340       st->index
00341     );
00342     AI::NewEvent(v->owner, new AIEventStationFirstVehicle(st->index, v->index));
00343   }
00344 }
00345 
00346 
00352 static Track ChooseShipTrack(Ship *v, TileIndex tile, DiagDirection enterdir, TrackBits tracks)
00353 {
00354   assert(IsValidDiagDirection(enterdir));
00355 
00356   bool path_found = true;
00357   Track track;
00358   switch (_settings_game.pf.pathfinder_for_ships) {
00359     case VPF_OPF: track = OPFShipChooseTrack(v, tile, enterdir, tracks, path_found); break;
00360     case VPF_NPF: track = NPFShipChooseTrack(v, tile, enterdir, tracks, path_found); break;
00361     case VPF_YAPF: track = YapfShipChooseTrack(v, tile, enterdir, tracks, path_found); break;
00362     default: NOT_REACHED();
00363   }
00364 
00365   v->HandlePathfindingResult(path_found);
00366   return track;
00367 }
00368 
00369 static const Direction _new_vehicle_direction_table[] = {
00370   DIR_N , DIR_NW, DIR_W , INVALID_DIR,
00371   DIR_NE, DIR_N , DIR_SW, INVALID_DIR,
00372   DIR_E , DIR_SE, DIR_S
00373 };
00374 
00375 static Direction ShipGetNewDirectionFromTiles(TileIndex new_tile, TileIndex old_tile)
00376 {
00377   uint offs = (TileY(new_tile) - TileY(old_tile) + 1) * 4 +
00378               TileX(new_tile) - TileX(old_tile) + 1;
00379   assert(offs < 11 && offs != 3 && offs != 7);
00380   return _new_vehicle_direction_table[offs];
00381 }
00382 
00383 static Direction ShipGetNewDirection(Vehicle *v, int x, int y)
00384 {
00385   uint offs = (y - v->y_pos + 1) * 4 + (x - v->x_pos + 1);
00386   assert(offs < 11 && offs != 3 && offs != 7);
00387   return _new_vehicle_direction_table[offs];
00388 }
00389 
00390 static inline TrackBits GetAvailShipTracks(TileIndex tile, DiagDirection dir)
00391 {
00392   return GetTileShipTrackStatus(tile) & DiagdirReachesTracks(dir);
00393 }
00394 
00395 static const byte _ship_subcoord[4][6][3] = {
00396   {
00397     {15, 8, 1},
00398     { 0, 0, 0},
00399     { 0, 0, 0},
00400     {15, 8, 2},
00401     {15, 7, 0},
00402     { 0, 0, 0},
00403   },
00404   {
00405     { 0, 0, 0},
00406     { 8, 0, 3},
00407     { 7, 0, 2},
00408     { 0, 0, 0},
00409     { 8, 0, 4},
00410     { 0, 0, 0},
00411   },
00412   {
00413     { 0, 8, 5},
00414     { 0, 0, 0},
00415     { 0, 7, 6},
00416     { 0, 0, 0},
00417     { 0, 0, 0},
00418     { 0, 8, 4},
00419   },
00420   {
00421     { 0, 0, 0},
00422     { 8, 15, 7},
00423     { 0, 0, 0},
00424     { 8, 15, 6},
00425     { 0, 0, 0},
00426     { 7, 15, 0},
00427   }
00428 };
00429 
00430 static void ShipController(Ship *v)
00431 {
00432   uint32 r;
00433   const byte *b;
00434   Direction dir;
00435   Track track;
00436   TrackBits tracks;
00437 
00438   v->tick_counter++;
00439   v->current_order_time++;
00440 
00441   if (v->HandleBreakdown()) return;
00442 
00443   if (v->vehstatus & VS_STOPPED) return;
00444 
00445   ProcessOrders(v);
00446   v->HandleLoading();
00447 
00448   if (v->current_order.IsType(OT_LOADING)) return;
00449 
00450   CheckShipLeaveDepot(v);
00451 
00452   v->ShowVisualEffect();
00453 
00454   if (!ShipAccelerate(v)) return;
00455 
00456   GetNewVehiclePosResult gp = GetNewVehiclePos(v);
00457   if (v->state != TRACK_BIT_WORMHOLE) {
00458     /* Not on a bridge */
00459     if (gp.old_tile == gp.new_tile) {
00460       /* Staying in tile */
00461       if (v->IsInDepot()) {
00462         gp.x = v->x_pos;
00463         gp.y = v->y_pos;
00464       } else {
00465         /* Not inside depot */
00466         r = VehicleEnterTile(v, gp.new_tile, gp.x, gp.y);
00467         if (HasBit(r, VETS_CANNOT_ENTER)) goto reverse_direction;
00468 
00469         /* A leave station order only needs one tick to get processed, so we can
00470          * always skip ahead. */
00471         if (v->current_order.IsType(OT_LEAVESTATION)) {
00472           v->current_order.Free();
00473           SetWindowWidgetDirty(WC_VEHICLE_VIEW, v->index, VVW_WIDGET_START_STOP_VEH);
00474         } else if (v->dest_tile != 0) {
00475           /* We have a target, let's see if we reached it... */
00476           if (v->current_order.IsType(OT_GOTO_WAYPOINT) &&
00477               DistanceManhattan(v->dest_tile, gp.new_tile) <= 3) {
00478             /* We got within 3 tiles of our target buoy, so let's skip to our
00479              * next order */
00480             UpdateVehicleTimetable(v, true);
00481             v->IncrementRealOrderIndex();
00482             v->current_order.MakeDummy();
00483           } else {
00484             /* Non-buoy orders really need to reach the tile */
00485             if (v->dest_tile == gp.new_tile) {
00486               if (v->current_order.IsType(OT_GOTO_DEPOT)) {
00487                 if ((gp.x & 0xF) == 8 && (gp.y & 0xF) == 8) {
00488                   VehicleEnterDepot(v);
00489                   return;
00490                 }
00491               } else if (v->current_order.IsType(OT_GOTO_STATION)) {
00492                 v->last_station_visited = v->current_order.GetDestination();
00493 
00494                 /* Process station in the orderlist. */
00495                 Station *st = Station::Get(v->current_order.GetDestination());
00496                 if (st->facilities & FACIL_DOCK) { // ugly, ugly workaround for problem with ships able to drop off cargo at wrong stations
00497                   ShipArrivesAt(v, st);
00498                   v->BeginLoading();
00499                 } else { // leave stations without docks right aways
00500                   v->current_order.MakeLeaveStation();
00501                   v->IncrementRealOrderIndex();
00502                 }
00503               }
00504             }
00505           }
00506         }
00507       }
00508     } else {
00509       DiagDirection diagdir;
00510       /* New tile */
00511       if (TileX(gp.new_tile) >= MapMaxX() || TileY(gp.new_tile) >= MapMaxY()) {
00512         goto reverse_direction;
00513       }
00514 
00515       dir = ShipGetNewDirectionFromTiles(gp.new_tile, gp.old_tile);
00516       assert(dir == DIR_NE || dir == DIR_SE || dir == DIR_SW || dir == DIR_NW);
00517       diagdir = DirToDiagDir(dir);
00518       tracks = GetAvailShipTracks(gp.new_tile, diagdir);
00519       if (tracks == TRACK_BIT_NONE) goto reverse_direction;
00520 
00521       /* Choose a direction, and continue if we find one */
00522       track = ChooseShipTrack(v, gp.new_tile, diagdir, tracks);
00523       if (track == INVALID_TRACK) goto reverse_direction;
00524 
00525       b = _ship_subcoord[diagdir][track];
00526 
00527       gp.x = (gp.x & ~0xF) | b[0];
00528       gp.y = (gp.y & ~0xF) | b[1];
00529 
00530       /* Call the landscape function and tell it that the vehicle entered the tile */
00531       r = VehicleEnterTile(v, gp.new_tile, gp.x, gp.y);
00532       if (HasBit(r, VETS_CANNOT_ENTER)) goto reverse_direction;
00533 
00534       if (!HasBit(r, VETS_ENTERED_WORMHOLE)) {
00535         v->tile = gp.new_tile;
00536         v->state = TrackToTrackBits(track);
00537       }
00538 
00539       v->direction = (Direction)b[2];
00540     }
00541   } else {
00542     /* On a bridge */
00543     if (!IsTileType(gp.new_tile, MP_TUNNELBRIDGE) || !HasBit(VehicleEnterTile(v, gp.new_tile, gp.x, gp.y), VETS_ENTERED_WORMHOLE)) {
00544       v->x_pos = gp.x;
00545       v->y_pos = gp.y;
00546       VehicleMove(v, !(v->vehstatus & VS_HIDDEN));
00547       return;
00548     }
00549   }
00550 
00551   /* update image of ship, as well as delta XY */
00552   dir = ShipGetNewDirection(v, gp.x, gp.y);
00553   v->x_pos = gp.x;
00554   v->y_pos = gp.y;
00555   v->z_pos = GetSlopeZ(gp.x, gp.y);
00556 
00557 getout:
00558   v->UpdateViewport(true, true);
00559   return;
00560 
00561 reverse_direction:
00562   dir = ReverseDir(v->direction);
00563   v->direction = dir;
00564   goto getout;
00565 }
00566 
00567 bool Ship::Tick()
00568 {
00569   if (!(this->vehstatus & VS_STOPPED)) this->running_ticks++;
00570 
00571   ShipController(this);
00572 
00573   return true;
00574 }
00575 
00585 CommandCost CmdBuildShip(TileIndex tile, DoCommandFlag flags, const Engine *e, uint16 data, Vehicle **ret)
00586 {
00587   tile = GetShipDepotNorthTile(tile);
00588   if (flags & DC_EXEC) {
00589     int x;
00590     int y;
00591 
00592     const ShipVehicleInfo *svi = &e->u.ship;
00593 
00594     Ship *v = new Ship();
00595     *ret = v;
00596 
00597     v->owner = _current_company;
00598     v->tile = tile;
00599     x = TileX(tile) * TILE_SIZE + TILE_SIZE / 2;
00600     y = TileY(tile) * TILE_SIZE + TILE_SIZE / 2;
00601     v->x_pos = x;
00602     v->y_pos = y;
00603     v->z_pos = GetSlopeZ(x, y);
00604 
00605     v->UpdateDeltaXY(v->direction);
00606     v->vehstatus = VS_HIDDEN | VS_STOPPED | VS_DEFPAL;
00607 
00608     v->spritenum = svi->image_index;
00609     v->cargo_type = e->GetDefaultCargoType();
00610     v->cargo_cap = svi->capacity;
00611 
00612     v->last_station_visited = INVALID_STATION;
00613     v->engine_type = e->index;
00614 
00615     v->reliability = e->reliability;
00616     v->reliability_spd_dec = e->reliability_spd_dec;
00617     v->max_age = e->GetLifeLengthInDays();
00618     _new_vehicle_id = v->index;
00619 
00620     v->state = TRACK_BIT_DEPOT;
00621 
00622     v->service_interval = Company::Get(_current_company)->settings.vehicle.servint_ships;
00623     v->date_of_last_service = _date;
00624     v->build_year = _cur_year;
00625     v->cur_image = SPR_IMG_QUERY;
00626     v->random_bits = VehicleRandomBits();
00627 
00628     v->UpdateCache();
00629 
00630     if (e->flags & ENGINE_EXCLUSIVE_PREVIEW) SetBit(v->vehicle_flags, VF_BUILT_AS_PROTOTYPE);
00631 
00632     v->InvalidateNewGRFCacheOfChain();
00633 
00634     v->cargo_cap = GetVehicleCapacity(v);
00635 
00636     v->InvalidateNewGRFCacheOfChain();
00637 
00638     VehicleMove(v, false);
00639   }
00640 
00641   return CommandCost();
00642 }
00643 
00644 bool Ship::FindClosestDepot(TileIndex *location, DestinationID *destination, bool *reverse)
00645 {
00646   const Depot *depot = FindClosestShipDepot(this, 0);
00647 
00648   if (depot == NULL) return false;
00649 
00650   if (location    != NULL) *location    = depot->xy;
00651   if (destination != NULL) *destination = depot->index;
00652 
00653   return true;
00654 }

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