# ship_cmd.cpp

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    00001 /* $Id$ */
    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 "newgrf_engine.h"
    00022 #include "pathfinder/yapf/yapf.h"
    00023 #include "newgrf_sound.h"
    00024 #include "spritecache.h"
    00025 #include "strings_func.h"
    00026 #include "window_func.h"
    00027 #include "date_func.h"
    00028 #include "vehicle_func.h"
    00029 #include "sound_func.h"
    00030 #include "ai/ai.hpp"
    00031 #include "pathfinder/opf/opf_ship.h"
    00032 #include "engine_base.h"
    00033 #include "company_base.h"
    00034 #include "tunnelbridge_map.h"
    00035 #include "zoom_func.h"
    00036
    00037 #include "table/strings.h"
    00038
    00044 WaterClass GetEffectiveWaterClass(TileIndex tile)
    00045 {
    00046   if (HasTileWaterClass(tile)) return GetWaterClass(tile);
    00047   if (IsTileType(tile, MP_TUNNELBRIDGE)) {
    00048     assert(GetTunnelBridgeTransportType(tile) == TRANSPORT_WATER);
    00049     return WATER_CLASS_CANAL;
    00050   }
    00051   if (IsTileType(tile, MP_RAILWAY)) {
    00052     assert(GetRailGroundType(tile) == RAIL_GROUND_WATER);
    00053     return WATER_CLASS_SEA;
    00054   }
    00055   NOT_REACHED();
    00056 }
    00057
    00058 static const uint16 _ship_sprites[] = {0x0E5D, 0x0E55, 0x0E65, 0x0E6D};
    00059
    00060 static inline TrackBits GetTileShipTrackStatus(TileIndex tile)
    00061 {
    00062   return TrackStatusToTrackBits(GetTileTrackStatus(tile, TRANSPORT_WATER, 0));
    00063 }
    00064
    00065 static SpriteID GetShipIcon(EngineID engine, EngineImageType image_type)
    00066 {
    00067   const Engine *e = Engine::Get(engine);
    00068   uint8 spritenum = e->u.ship.image_index;
    00069
    00070   if (is_custom_sprite(spritenum)) {
    00071     SpriteID sprite = GetCustomVehicleIcon(engine, DIR_W, image_type);
    00072     if (sprite != 0) return sprite;
    00073
    00074     spritenum = e->original_image_index;
    00075   }
    00076
    00077   return DIR_W + _ship_sprites[spritenum];
    00078 }
    00079
    00080 void DrawShipEngine(int left, int right, int preferred_x, int y, EngineID engine, PaletteID pal, EngineImageType image_type)
    00081 {
    00082   SpriteID sprite = GetShipIcon(engine, image_type);
    00083   const Sprite *real_sprite = GetSprite(sprite, ST_NORMAL);
    00084   preferred_x = Clamp(preferred_x, left - UnScaleByZoom(real_sprite->x_offs, ZOOM_LVL_GUI), right - UnScaleByZoom(real_sprite->width, ZOOM_LVL_GUI) - UnScaleByZoom(real_sprite->x_offs, ZOOM_LVL_GUI));
    00085   DrawSprite(sprite, pal, preferred_x, y);
    00086 }
    00087
    00094 void GetShipSpriteSize(EngineID engine, uint &width, uint &height, EngineImageType image_type)
    00095 {
    00096   const Sprite *spr = GetSprite(GetShipIcon(engine, image_type), ST_NORMAL);
    00097
    00098   width  = UnScaleByZoom(spr->width, ZOOM_LVL_GUI);
    00099   height = UnScaleByZoom(spr->height, ZOOM_LVL_GUI);
    00100 }
    00101
    00102 SpriteID Ship::GetImage(Direction direction, EngineImageType image_type) const
    00103 {
    00104   uint8 spritenum = this->spritenum;
    00105
    00106   if (is_custom_sprite(spritenum)) {
    00107     SpriteID sprite = GetCustomVehicleSprite(this, direction, image_type);
    00108     if (sprite != 0) return sprite;
    00109
    00110     spritenum = this->GetEngine()->original_image_index;
    00111   }
    00112
    00113   return _ship_sprites[spritenum] + direction;
    00114 }
    00115
    00116 static const Depot *FindClosestShipDepot(const Vehicle *v, uint max_distance)
    00117 {
    00118   /* Find the closest depot */
    00119   const Depot *depot;
    00120   const Depot *best_depot = NULL;
    00121   /* If we don't have a maximum distance, i.e. distance = 0,
    00122    * we want to find any depot so the best distance of no
    00123    * depot must be more than any correct distance. On the
    00124    * other hand if we have set a maximum distance, any depot
    00125    * further away than max_distance can safely be ignored. */
    00126   uint best_dist = max_distance == 0 ? UINT_MAX : max_distance + 1;
    00127
    00128   FOR_ALL_DEPOTS(depot) {
    00129     TileIndex tile = depot->xy;
    00130     if (IsShipDepotTile(tile) && IsTileOwner(tile, v->owner)) {
    00131       uint dist = DistanceManhattan(tile, v->tile);
    00132       if (dist < best_dist) {
    00133         best_dist = dist;
    00134         best_depot = depot;
    00135       }
    00136     }
    00137   }
    00138
    00139   return best_depot;
    00140 }
    00141
    00142 static void CheckIfShipNeedsService(Vehicle *v)
    00143 {
    00144   if (Company::Get(v->owner)->settings.vehicle.servint_ships == 0 || !v->NeedsAutomaticServicing()) return;
    00145   if (v->IsChainInDepot()) {
    00146     VehicleServiceInDepot(v);
    00147     return;
    00148   }
    00149
    00150   uint max_distance;
    00151   switch (_settings_game.pf.pathfinder_for_ships) {
    00152     case VPF_OPF:  max_distance = 12; break;
    00153     case VPF_NPF:  max_distance = _settings_game.pf.npf.maximum_go_to_depot_penalty  / NPF_TILE_LENGTH;  break;
    00154     case VPF_YAPF: max_distance = _settings_game.pf.yapf.maximum_go_to_depot_penalty / YAPF_TILE_LENGTH; break;
    00155     default: NOT_REACHED();
    00156   }
    00157
    00158   const Depot *depot = FindClosestShipDepot(v, max_distance);
    00159
    00160   if (depot == NULL) {
    00161     if (v->current_order.IsType(OT_GOTO_DEPOT)) {
    00162       v->current_order.MakeDummy();
    00163       SetWindowWidgetDirty(WC_VEHICLE_VIEW, v->index, WID_VV_START_STOP);
    00164     }
    00165     return;
    00166   }
    00167
    00168   v->current_order.MakeGoToDepot(depot->index, ODTFB_SERVICE);
    00169   v->dest_tile = depot->xy;
    00170   SetWindowWidgetDirty(WC_VEHICLE_VIEW, v->index, WID_VV_START_STOP);
    00171 }
    00172
    00176 void Ship::UpdateCache()
    00177 {
    00178   const ShipVehicleInfo *svi = ShipVehInfo(this->engine_type);
    00179
    00180   /* Get speed fraction for the current water type. Aqueducts are always canals. */
    00181   bool is_ocean = GetEffectiveWaterClass(this->tile) == WATER_CLASS_SEA;
    00182   uint raw_speed = GetVehicleProperty(this, PROP_SHIP_SPEED, svi->max_speed);
    00183   this->vcache.cached_max_speed = svi->ApplyWaterClassSpeedFrac(raw_speed, is_ocean);
    00184
    00185   /* Update cargo aging period. */
    00186   this->vcache.cached_cargo_age_period = GetVehicleProperty(this, PROP_SHIP_CARGO_AGE_PERIOD, EngInfo(this->engine_type)->cargo_age_period);
    00187
    00188   this->UpdateVisualEffect();
    00189 }
    00190
    00191 Money Ship::GetRunningCost() const
    00192 {
    00193   const Engine *e = this->GetEngine();
    00194   uint cost_factor = GetVehicleProperty(this, PROP_SHIP_RUNNING_COST_FACTOR, e->u.ship.running_cost);
    00195   return GetPrice(PR_RUNNING_SHIP, cost_factor, e->GetGRF());
    00196 }
    00197
    00198 void Ship::OnNewDay()
    00199 {
    00200   if ((++this->day_counter & 7) == 0) {
    00201     DecreaseVehicleValue(this);
    00202   }
    00203
    00204   CheckVehicleBreakdown(this);
    00205   AgeVehicle(this);
    00206   CheckIfShipNeedsService(this);
    00207
    00208   CheckOrders(this);
    00209
    00210   if (this->running_ticks == 0) return;
    00211
    00212   CommandCost cost(EXPENSES_SHIP_RUN, this->GetRunningCost() * this->running_ticks / (DAYS_IN_YEAR * DAY_TICKS));
    00213
    00214   this->profit_this_year -= cost.GetCost();
    00215   this->running_ticks = 0;
    00216
    00217   SubtractMoneyFromCompanyFract(this->owner, cost);
    00218
    00219   SetWindowDirty(WC_VEHICLE_DETAILS, this->index);
    00220   /* we need this for the profit */
    00221   SetWindowClassesDirty(WC_SHIPS_LIST);
    00222 }
    00223
    00224 Trackdir Ship::GetVehicleTrackdir() const
    00225 {
    00226   if (this->vehstatus & VS_CRASHED) return INVALID_TRACKDIR;
    00227
    00228   if (this->IsInDepot()) {
    00229     /* We'll assume the ship is facing outwards */
    00230     return DiagDirToDiagTrackdir(GetShipDepotDirection(this->tile));
    00231   }
    00232
    00233   if (this->state == TRACK_BIT_WORMHOLE) {
    00234     /* ship on aqueduct, so just use his direction and assume a diagonal track */
    00235     return DiagDirToDiagTrackdir(DirToDiagDir(this->direction));
    00236   }
    00237
    00238   return TrackDirectionToTrackdir(FindFirstTrack(this->state), this->direction);
    00239 }
    00240
    00241 void Ship::MarkDirty()
    00242 {
    00243   this->UpdateViewport(false, false);
    00244   this->UpdateCache();
    00245 }
    00246
    00247 static void PlayShipSound(const Vehicle *v)
    00248 {
    00249   if (!PlayVehicleSound(v, VSE_START)) {
    00250     SndPlayVehicleFx(ShipVehInfo(v->engine_type)->sfx, v);
    00251   }
    00252 }
    00253
    00254 void Ship::PlayLeaveStationSound() const
    00255 {
    00256   PlayShipSound(this);
    00257 }
    00258
    00259 TileIndex Ship::GetOrderStationLocation(StationID station)
    00260 {
    00261   if (station == this->last_station_visited) this->last_station_visited = INVALID_STATION;
    00262
    00263   const Station *st = Station::Get(station);
    00264   if (st->dock_tile != INVALID_TILE) {
    00265     return TILE_ADD(st->dock_tile, ToTileIndexDiff(GetDockOffset(st->dock_tile)));
    00266   } else {
    00267     this->IncrementRealOrderIndex();
    00268     return 0;
    00269   }
    00270 }
    00271
    00272 void Ship::UpdateDeltaXY(Direction direction)
    00273 {
    00274   static const int8 _delta_xy_table[8][4] = {
    00275     /* y_extent, x_extent, y_offs, x_offs */
    00276     { 6,  6,  -3,  -3}, // N
    00277     { 6, 32,  -3, -16}, // NE
    00278     { 6,  6,  -3,  -3}, // E
    00279     {32,  6, -16,  -3}, // SE
    00280     { 6,  6,  -3,  -3}, // S
    00281     { 6, 32,  -3, -16}, // SW
    00282     { 6,  6,  -3,  -3}, // W
    00283     {32,  6, -16,  -3}, // NW
    00284   };
    00285
    00286   const int8 *bb = _delta_xy_table[direction];
    00287   this->x_offs        = bb[3];
    00288   this->y_offs        = bb[2];
    00289   this->x_extent      = bb[1];
    00290   this->y_extent      = bb[0];
    00291   this->z_extent      = 6;
    00292 }
    00293
    00294 static const TileIndexDiffC _ship_leave_depot_offs[] = {
    00295   {-1,  0},
    00296   { 0, -1}
    00297 };
    00298
    00299 static bool CheckShipLeaveDepot(Ship *v)
    00300 {
    00301   if (!v->IsChainInDepot()) return false;
    00302
    00303   /* We are leaving a depot, but have to go to the exact same one; re-enter */
    00304   if (v->current_order.IsType(OT_GOTO_DEPOT) &&
    00305       IsShipDepotTile(v->tile) && GetDepotIndex(v->tile) == v->current_order.GetDestination()) {
    00306     VehicleEnterDepot(v);
    00307     return true;
    00308   }
    00309
    00310   TileIndex tile = v->tile;
    00311   Axis axis = GetShipDepotAxis(tile);
    00312
    00313   DiagDirection north_dir = ReverseDiagDir(AxisToDiagDir(axis));
    00314   TileIndex north_neighbour = TILE_ADD(tile, ToTileIndexDiff(_ship_leave_depot_offs[axis]));
    00315   DiagDirection south_dir = AxisToDiagDir(axis);
    00316   TileIndex south_neighbour = TILE_ADD(tile, -2 * ToTileIndexDiff(_ship_leave_depot_offs[axis]));
    00317
    00318   TrackBits north_tracks = DiagdirReachesTracks(north_dir) & GetTileShipTrackStatus(north_neighbour);
    00319   TrackBits south_tracks = DiagdirReachesTracks(south_dir) & GetTileShipTrackStatus(south_neighbour);
    00320   if (north_tracks && south_tracks) {
    00321     /* Ask pathfinder for best direction */
    00322     bool reverse = false;
    00323     bool path_found;
    00324     switch (_settings_game.pf.pathfinder_for_ships) {
    00325       case VPF_OPF: reverse = OPFShipChooseTrack(v, north_neighbour, north_dir, north_tracks, path_found) == INVALID_TRACK; break; // OPF always allows reversing
    00326       case VPF_NPF: reverse = NPFShipCheckReverse(v); break;
    00327       case VPF_YAPF: reverse = YapfShipCheckReverse(v); break;
    00328       default: NOT_REACHED();
    00329     }
    00330     if (reverse) north_tracks = TRACK_BIT_NONE;
    00331   }
    00332
    00333   if (north_tracks) {
    00334     /* Leave towards north */
    00335     v->direction = DiagDirToDir(north_dir);
    00336   } else if (south_tracks) {
    00337     /* Leave towards south */
    00338     v->direction = DiagDirToDir(south_dir);
    00339   } else {
    00340     /* Both ways blocked */
    00341     return false;
    00342   }
    00343
    00344   v->state = AxisToTrackBits(axis);
    00345   v->vehstatus &= ~VS_HIDDEN;
    00346
    00347   v->cur_speed = 0;
    00348   v->UpdateViewport(true, true);
    00349   SetWindowDirty(WC_VEHICLE_DEPOT, v->tile);
    00350
    00351   PlayShipSound(v);
    00352   VehicleServiceInDepot(v);
    00353   InvalidateWindowData(WC_VEHICLE_DEPOT, v->tile);
    00354   SetWindowClassesDirty(WC_SHIPS_LIST);
    00355
    00356   return false;
    00357 }
    00358
    00359 static bool ShipAccelerate(Vehicle *v)
    00360 {
    00361   uint spd;
    00362   byte t;
    00363
    00364   spd = min(v->cur_speed + 1, v->vcache.cached_max_speed);
    00365   spd = min(spd, v->current_order.max_speed * 2);
    00366
    00367   /* updates statusbar only if speed have changed to save CPU time */
    00368   if (spd != v->cur_speed) {
    00369     v->cur_speed = spd;
    00370     SetWindowWidgetDirty(WC_VEHICLE_VIEW, v->index, WID_VV_START_STOP);
    00371   }
    00372
    00373   /* Convert direction-indepenent speed into direction-dependent speed. (old movement method) */
    00374   spd = v->GetOldAdvanceSpeed(spd);
    00375
    00376   if (spd == 0) return false;
    00377   if ((byte)++spd == 0) return true;
    00378
    00379   v->progress = (t = v->progress) - (byte)spd;
    00380
    00381   return (t < v->progress);
    00382 }
    00383
    00389 static void ShipArrivesAt(const Vehicle *v, Station *st)
    00390 {
    00391   /* Check if station was ever visited before */
    00392   if (!(st->had_vehicle_of_type & HVOT_SHIP)) {
    00393     st->had_vehicle_of_type |= HVOT_SHIP;
    00394
    00395     SetDParam(0, st->index);
    00396     AddVehicleNewsItem(
    00397       STR_NEWS_FIRST_SHIP_ARRIVAL,
    00398       (v->owner == _local_company) ? NT_ARRIVAL_COMPANY : NT_ARRIVAL_OTHER,
    00399       v->index,
    00400       st->index
    00401     );
    00402     AI::NewEvent(v->owner, new ScriptEventStationFirstVehicle(st->index, v->index));
    00403   }
    00404 }
    00405
    00406
    00416 static Track ChooseShipTrack(Ship *v, TileIndex tile, DiagDirection enterdir, TrackBits tracks)
    00417 {
    00418   assert(IsValidDiagDirection(enterdir));
    00419
    00420   bool path_found = true;
    00421   Track track;
    00422   switch (_settings_game.pf.pathfinder_for_ships) {
    00423     case VPF_OPF: track = OPFShipChooseTrack(v, tile, enterdir, tracks, path_found); break;
    00424     case VPF_NPF: track = NPFShipChooseTrack(v, tile, enterdir, tracks, path_found); break;
    00425     case VPF_YAPF: track = YapfShipChooseTrack(v, tile, enterdir, tracks, path_found); break;
    00426     default: NOT_REACHED();
    00427   }
    00428
    00429   v->HandlePathfindingResult(path_found);
    00430   return track;
    00431 }
    00432
    00433 static const Direction _new_vehicle_direction_table[] = {
    00434   DIR_N , DIR_NW, DIR_W , INVALID_DIR,
    00435   DIR_NE, DIR_N , DIR_SW, INVALID_DIR,
    00436   DIR_E , DIR_SE, DIR_S
    00437 };
    00438
    00439 static Direction ShipGetNewDirectionFromTiles(TileIndex new_tile, TileIndex old_tile)
    00440 {
    00441   uint offs = (TileY(new_tile) - TileY(old_tile) + 1) * 4 +
    00442               TileX(new_tile) - TileX(old_tile) + 1;
    00443   assert(offs < 11 && offs != 3 && offs != 7);
    00444   return _new_vehicle_direction_table[offs];
    00445 }
    00446
    00447 static Direction ShipGetNewDirection(Vehicle *v, int x, int y)
    00448 {
    00449   uint offs = (y - v->y_pos + 1) * 4 + (x - v->x_pos + 1);
    00450   assert(offs < 11 && offs != 3 && offs != 7);
    00451   return _new_vehicle_direction_table[offs];
    00452 }
    00453
    00454 static inline TrackBits GetAvailShipTracks(TileIndex tile, DiagDirection dir)
    00455 {
    00456   return GetTileShipTrackStatus(tile) & DiagdirReachesTracks(dir);
    00457 }
    00458
    00459 static const byte _ship_subcoord[4][6][3] = {
    00460   {
    00461     {15, 8, 1},
    00462     { 0, 0, 0},
    00463     { 0, 0, 0},
    00464     {15, 8, 2},
    00465     {15, 7, 0},
    00466     { 0, 0, 0},
    00467   },
    00468   {
    00469     { 0, 0, 0},
    00470     { 8, 0, 3},
    00471     { 7, 0, 2},
    00472     { 0, 0, 0},
    00473     { 8, 0, 4},
    00474     { 0, 0, 0},
    00475   },
    00476   {
    00477     { 0, 8, 5},
    00478     { 0, 0, 0},
    00479     { 0, 7, 6},
    00480     { 0, 0, 0},
    00481     { 0, 0, 0},
    00482     { 0, 8, 4},
    00483   },
    00484   {
    00485     { 0, 0, 0},
    00486     { 8, 15, 7},
    00487     { 0, 0, 0},
    00488     { 8, 15, 6},
    00489     { 0, 0, 0},
    00490     { 7, 15, 0},
    00491   }
    00492 };
    00493
    00494 static void ShipController(Ship *v)
    00495 {
    00496   uint32 r;
    00497   const byte *b;
    00498   Direction dir;
    00499   Track track;
    00500   TrackBits tracks;
    00501
    00502   v->tick_counter++;
    00503   v->current_order_time++;
    00504
    00505   if (v->HandleBreakdown()) return;
    00506
    00507   if (v->vehstatus & VS_STOPPED) return;
    00508
    00509   ProcessOrders(v);
    00510   v->HandleLoading();
    00511
    00512   if (v->current_order.IsType(OT_LOADING)) return;
    00513
    00514   if (CheckShipLeaveDepot(v)) return;
    00515
    00516   v->ShowVisualEffect();
    00517
    00518   if (!ShipAccelerate(v)) return;
    00519
    00520   GetNewVehiclePosResult gp = GetNewVehiclePos(v);
    00521   if (v->state != TRACK_BIT_WORMHOLE) {
    00522     /* Not on a bridge */
    00523     if (gp.old_tile == gp.new_tile) {
    00524       /* Staying in tile */
    00525       if (v->IsInDepot()) {
    00526         gp.x = v->x_pos;
    00527         gp.y = v->y_pos;
    00528       } else {
    00529         /* Not inside depot */
    00530         r = VehicleEnterTile(v, gp.new_tile, gp.x, gp.y);
    00531         if (HasBit(r, VETS_CANNOT_ENTER)) goto reverse_direction;
    00532
    00533         /* A leave station order only needs one tick to get processed, so we can
    00534          * always skip ahead. */
    00535         if (v->current_order.IsType(OT_LEAVESTATION)) {
    00536           v->current_order.Free();
    00537           SetWindowWidgetDirty(WC_VEHICLE_VIEW, v->index, WID_VV_START_STOP);
    00538         } else if (v->dest_tile != 0) {
    00539           /* We have a target, let's see if we reached it... */
    00540           if (v->current_order.IsType(OT_GOTO_WAYPOINT) &&
    00541               DistanceManhattan(v->dest_tile, gp.new_tile) <= 3) {
    00542             /* We got within 3 tiles of our target buoy, so let's skip to our
    00543              * next order */
    00544             UpdateVehicleTimetable(v, true);
    00545             v->IncrementRealOrderIndex();
    00546             v->current_order.MakeDummy();
    00547           } else {
    00548             /* Non-buoy orders really need to reach the tile */
    00549             if (v->dest_tile == gp.new_tile) {
    00550               if (v->current_order.IsType(OT_GOTO_DEPOT)) {
    00551                 if ((gp.x & 0xF) == 8 && (gp.y & 0xF) == 8) {
    00552                   VehicleEnterDepot(v);
    00553                   return;
    00554                 }
    00555               } else if (v->current_order.IsType(OT_GOTO_STATION)) {
    00556                 v->last_station_visited = v->current_order.GetDestination();
    00557
    00558                 /* Process station in the orderlist. */
    00559                 Station *st = Station::Get(v->current_order.GetDestination());
    00560                 if (st->facilities & FACIL_DOCK) { // ugly, ugly workaround for problem with ships able to drop off cargo at wrong stations
    00561                   ShipArrivesAt(v, st);
    00562                   v->BeginLoading();
    00563                 } else { // leave stations without docks right aways
    00564                   v->current_order.MakeLeaveStation();
    00565                   v->IncrementRealOrderIndex();
    00566                 }
    00567               }
    00568             }
    00569           }
    00570         }
    00571       }
    00572     } else {
    00573       /* New tile */
    00574       if (!IsValidTile(gp.new_tile)) goto reverse_direction;
    00575
    00576       dir = ShipGetNewDirectionFromTiles(gp.new_tile, gp.old_tile);
    00577       assert(dir == DIR_NE || dir == DIR_SE || dir == DIR_SW || dir == DIR_NW);
    00578       DiagDirection diagdir = DirToDiagDir(dir);
    00579       tracks = GetAvailShipTracks(gp.new_tile, diagdir);
    00580       if (tracks == TRACK_BIT_NONE) goto reverse_direction;
    00581
    00582       /* Choose a direction, and continue if we find one */
    00583       track = ChooseShipTrack(v, gp.new_tile, diagdir, tracks);
    00584       if (track == INVALID_TRACK) goto reverse_direction;
    00585
    00586       b = _ship_subcoord[diagdir][track];
    00587
    00588       gp.x = (gp.x & ~0xF) | b[0];
    00589       gp.y = (gp.y & ~0xF) | b[1];
    00590
    00591       /* Call the landscape function and tell it that the vehicle entered the tile */
    00592       r = VehicleEnterTile(v, gp.new_tile, gp.x, gp.y);
    00593       if (HasBit(r, VETS_CANNOT_ENTER)) goto reverse_direction;
    00594
    00595       if (!HasBit(r, VETS_ENTERED_WORMHOLE)) {
    00596         v->tile = gp.new_tile;
    00597         v->state = TrackToTrackBits(track);
    00598
    00599         /* Update ship cache when the water class changes. Aqueducts are always canals. */
    00600         WaterClass old_wc = GetEffectiveWaterClass(gp.old_tile);
    00601         WaterClass new_wc = GetEffectiveWaterClass(gp.new_tile);
    00602         if (old_wc != new_wc) v->UpdateCache();
    00603       }
    00604
    00605       v->direction = (Direction)b[2];
    00606     }
    00607   } else {
    00608     /* On a bridge */
    00609     if (!IsTileType(gp.new_tile, MP_TUNNELBRIDGE) || !HasBit(VehicleEnterTile(v, gp.new_tile, gp.x, gp.y), VETS_ENTERED_WORMHOLE)) {
    00610       v->x_pos = gp.x;
    00611       v->y_pos = gp.y;
    00612       VehicleUpdatePosition(v);
    00613       if ((v->vehstatus & VS_HIDDEN) == 0) VehicleUpdateViewport(v, true);
    00614       return;
    00615     }
    00616   }
    00617
    00618   /* update image of ship, as well as delta XY */
    00619   dir = ShipGetNewDirection(v, gp.x, gp.y);
    00620   v->x_pos = gp.x;
    00621   v->y_pos = gp.y;
    00622   v->z_pos = GetSlopePixelZ(gp.x, gp.y);
    00623
    00624 getout:
    00625   VehicleUpdatePosition(v);
    00626   v->UpdateViewport(true, true);
    00627   return;
    00628
    00629 reverse_direction:
    00630   dir = ReverseDir(v->direction);
    00631   v->direction = dir;
    00632   goto getout;
    00633 }
    00634
    00635 bool Ship::Tick()
    00636 {
    00637   if (!(this->vehstatus & VS_STOPPED)) this->running_ticks++;
    00638
    00639   ShipController(this);
    00640
    00641   return true;
    00642 }
    00643
    00653 CommandCost CmdBuildShip(TileIndex tile, DoCommandFlag flags, const Engine *e, uint16 data, Vehicle **ret)
    00654 {
    00655   tile = GetShipDepotNorthTile(tile);
    00656   if (flags & DC_EXEC) {
    00657     int x;
    00658     int y;
    00659
    00660     const ShipVehicleInfo *svi = &e->u.ship;
    00661
    00662     Ship *v = new Ship();
    00663     *ret = v;
    00664
    00665     v->owner = _current_company;
    00666     v->tile = tile;
    00667     x = TileX(tile) * TILE_SIZE + TILE_SIZE / 2;
    00668     y = TileY(tile) * TILE_SIZE + TILE_SIZE / 2;
    00669     v->x_pos = x;
    00670     v->y_pos = y;
    00671     v->z_pos = GetSlopePixelZ(x, y);
    00672
    00673     v->UpdateDeltaXY(v->direction);
    00674     v->vehstatus = VS_HIDDEN | VS_STOPPED | VS_DEFPAL;
    00675
    00676     v->spritenum = svi->image_index;
    00677     v->cargo_type = e->GetDefaultCargoType();
    00678     v->cargo_cap = svi->capacity;
    00679
    00680     v->last_station_visited = INVALID_STATION;
    00681     v->last_loading_station = INVALID_STATION;
    00682     v->engine_type = e->index;
    00683
    00684     v->reliability = e->reliability;
    00685     v->reliability_spd_dec = e->reliability_spd_dec;
    00686     v->max_age = e->GetLifeLengthInDays();
    00687     _new_vehicle_id = v->index;
    00688
    00689     v->state = TRACK_BIT_DEPOT;
    00690
    00691     v->service_interval = Company::Get(_current_company)->settings.vehicle.servint_ships;
    00692     v->date_of_last_service = _date;
    00693     v->build_year = _cur_year;
    00694     v->cur_image = SPR_IMG_QUERY;
    00695     v->random_bits = VehicleRandomBits();
    00696
    00697     v->UpdateCache();
    00698
    00699     if (e->flags & ENGINE_EXCLUSIVE_PREVIEW) SetBit(v->vehicle_flags, VF_BUILT_AS_PROTOTYPE);
    00700
    00701     v->InvalidateNewGRFCacheOfChain();
    00702
    00703     v->cargo_cap = e->DetermineCapacity(v);
    00704
    00705     v->InvalidateNewGRFCacheOfChain();
    00706
    00707     VehicleUpdatePosition(v);
    00708   }
    00709
    00710   return CommandCost();
    00711 }
    00712
    00713 bool Ship::FindClosestDepot(TileIndex *location, DestinationID *destination, bool *reverse)
    00714 {
    00715   const Depot *depot = FindClosestShipDepot(this, 0);
    00716
    00717   if (depot == NULL) return false;
    00718
    00719   if (location    != NULL) *location    = depot->xy;
    00720   if (destination != NULL) *destination = depot->index;
    00721
    00722   return true;
    00723 }